WO2020237863A1

WO2020237863A1 - Operation control method and apparatus, and circuit, household appliance and computer storage medium

Info

Publication number: WO2020237863A1
Application number: PCT/CN2019/102642
Authority: WO
Inventors: 胡斌; 曾贤杰; 文先仕
Original assignee: 广东美的制冷设备有限公司; 美的集团股份有限公司
Priority date: 2019-05-31
Filing date: 2019-08-26
Publication date: 2020-12-03
Also published as: JP2022535514A; JP7269380B2

Abstract

Provided are an operation control method and apparatus, and a circuit, a household appliance and a computer storage medium. The operation control method comprises: if the situation whereby an alternating-current power supply signal reaches any zero crossing point is collected, and an action signal meets a preset switching condition in a duration of the state of the action signal, switching the state of the action signal at the zero crossing point, wherein the state of the action signal comprises an output state and an output stop state. By means of the technical solution of the present disclosure, the output of an action signal in an intermittent oscillation mode is realized, so as to reduce the conduction power consumption of a PFC switch module in a drive control circuit; by means of executing, at a zero crossing point, a switching operation on an output state, the stability of a switching operation can be improved; and when the output of the action signal is stopped, the energy of an energy storage inductor on an output flow path can be effectively released to prevent there being impact on a switch tube.

Description

Operation control method, device, circuit, household electrical appliance and computer storage medium

This application is required to be submitted to the Chinese Patent Office on May 31, 2019, the application number is 201910472245.7, the public name is "operation control methods, devices, circuits, household appliances and computer storage media", and it is submitted to the Chinese Patent Office on May 31, 2019 , The application number is 201910472259.9, the public name is "Operation control methods, devices, circuits, household appliances and computer storage media", which was submitted to the Chinese Patent Office on May 31, 2019, the application number is 201910472229.8, and the public name is "Operation control methods, Devices, circuits, household appliances and computer storage media" were submitted to the Chinese Patent Office on May 31, 2019, with the application number 201910473282.X, and the public name "Operation control methods, devices, circuits, household appliances and computer storage media" in China The priority of the patent application, the entire content of which is incorporated in this application by reference.

Technical field

The present disclosure relates to the field of drive control, and in particular, to an operation control method, an operation control device, a drive control circuit, a household appliance and a computer-readable storage medium.

Background technique

Active PFC (Power Factor Correction, power factor correction) technology has been widely used due to its high power factor, low harmonic current, stable output voltage and other advantages. In the related technology, the boost type is adopted. PFC circuit structure, and use continuous PWM (pulse width modulation signal) output to control the switching unit to achieve boost action, so that the phase of the input current and the input voltage are consistent, but there are still the following defects in the application process:

The PFC control scheme through continuous PWM output has a very low power factor at low loads. As the load decreases, the ratio of the conduction loss to the total power will be higher, resulting in a lower operating efficiency.

Public content

The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

For this reason, an object of the present disclosure is to propose an operation control method.

Another object of the present disclosure is to provide an operation control device.

Another objective of the present disclosure is to provide a drive control circuit.

Another objective of the present disclosure is to provide a household electrical appliance.

Another object of the present disclosure is to provide a computer-readable storage medium.

The operation control method in the technical solution of the first aspect of the present disclosure is applicable to a drive control circuit, the drive control circuit includes a power factor correction module, and the power factor correction module includes a switch tube to control AC power supply by outputting an action signal to the switch tube The signal supplies power to the load, and the operation control method includes: the AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the current state meets the preset switching condition, and the state switching operation is performed at the zero-crossing point, where the state of the action signal includes In the output state and the stop output state, the bus voltage is in an upward trend in the output state, and in the stop output state, the switch tube stops switching, and the bus voltage is in a downward trend.

The operation control method in the technical solution of the second aspect of the present disclosure is applicable to a drive control circuit, the drive control circuit is used to control the power supply signal to supply power to the load, and the drive control circuit also performs power factor correction by receiving a pulse width modulation signal The operation control method includes: determining the rate of change of the bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load, so as to determine the switching time point of the action signal state according to the rate of change, wherein the action signal state includes output State and stop output state, the bus voltage is in an upward trend in the output state, in the stop output state, the switch tube stops switching, and the bus voltage is in a downward trend.

In the technical solution of the third aspect of the present disclosure, an operation control device is proposed. The operation control device may specifically include a processor and a current sensor. The current sensor collects the current of the load and uses the current as the operating power. The power consumption is applied to the calculation of the rate of change of the bus voltage. When the processor executes the computer program, the operation control method as described above can be implemented. Therefore, the operation control device has the beneficial technical effects of the above at least one operation control method, I will not repeat them here.

In the technical solution of the fourth aspect of the present disclosure, a drive control circuit is proposed. The drive control circuit is used to supply power to the load with the power supply signal input from the grid system. The drive control circuit is connected to the at least one operation control device described above to drive The control circuit includes: a power factor correction module, including a switch tube; a drive module, electrically connected to the power factor correction module, for outputting a pulse width modulation signal to the switch tube, so that the power factor correction module performs power factor correction operations; as in this application The operation control device described in the technical solution of the third aspect is electrically connected to the drive module and the load.

A fifth aspect of the present disclosure provides a household electrical appliance, including: a load; the drive control circuit as described in at least one of the above, the drive control circuit is connected between the power grid system and the load, and the drive control circuit is configured To control the grid system to supply power to the load.

In this technical solution, the home appliance includes the drive control circuit as described in any of the above technical solutions. Therefore, the home appliance includes all the beneficial effects of the drive control circuit as described in any of the above technical solutions. Repeat.

In the above technical solution, the household electrical appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner, and a host computer.

A sixth aspect of the present disclosure provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the steps of the operation control method as described in at least one of the above are realized.

In this technical solution, the computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it implements the operation control method as in any of the above technical solutions. Therefore, the computer-readable storage medium includes any of the above technical solutions. All the beneficial effects of the operation control method in, will not be repeated.

The operation control method, device, circuit, household appliance, and computer storage medium provided by the embodiments of the present disclosure collect the duration of the current state and the state of the corresponding AC power supply signal when the action signal is in the output state or in the stop output state, If at a zero-crossing point of the AC power supply signal, the duration of the corresponding current state meets the preset switching condition at the same time, the switching operation of the action signal is performed at the zero-crossing point, so that after the action signal is in the output state for a period of time, the A certain zero-crossing point of the power supply signal is switched to the stop output state and maintained for a period of time to complete an operation cycle of the intermittent oscillation mode. On the one hand, by realizing the output of the action signal in the intermittent oscillation mode, the drive control circuit can be reduced The conduction power consumption of the PFC switch module can improve the energy efficiency of electrical equipment (such as air conditioners) that use the drive control circuit. On the other hand, it can realize the regular switching of the action signal in the intermittent oscillation mode. The zero-crossing point performs the switching operation of the output state, which can improve the stability of the switching operation. When the output of the action signal is stopped, the energy of the energy storage inductor on the output flow path can be effectively released to prevent impact on the switch tube.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 shows a schematic flow chart of an operation control method according to an embodiment of the present disclosure;

FIG. 2 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure;

FIG. 3 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 4 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 5 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 6 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 7 shows a schematic flowchart of an operation control method according to an embodiment of the present disclosure;

FIG. 8 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure;

FIG. 9 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 10 shows a schematic flowchart of an operation control method according to an embodiment of the present disclosure;

FIG. 11 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure;

FIG. 12 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure;

FIG. 13 shows a schematic flowchart of an operation control method according to an embodiment of the present disclosure;

FIG. 14 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure;

Fig. 15 shows a schematic block diagram of an operation control device according to an embodiment of the present disclosure;

FIG. 16 shows a schematic diagram of a drive control circuit according to an embodiment of the present disclosure;

FIG. 17 shows a schematic diagram of the driving control circuit in FIG. 16 in the first output mode;

FIG. 18 shows a schematic diagram of the driving control circuit in FIG. 16 in the second output mode;

FIG. 19 shows a schematic diagram of the drive control circuit in FIG. 16 not in an output mode;

Figure 20 shows a schematic diagram of a drive control circuit provided with a totem pole PFC module;

FIG. 21 shows a schematic diagram of control signals of the drive control circuit in FIG. 20 in the first control mode;

FIG. 22 shows a schematic diagram of a power supply signal when the drive control circuit in FIG. 20 outputs a PWM signal to the switch tube;

FIG. 23 shows a graph of control signals of the drive control circuit in FIG. 20 in the second control mode;

FIG. 24 shows a graph of the control signal of the drive control circuit in FIG. 20 in the third control mode.

Detailed ways

In order to be able to understand the above objectives, features and advantages of the present disclosure more clearly, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the following description, many specific details are set forth in order to fully understand the present disclosure. However, the present disclosure can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present disclosure is not limited to the specific disclosures below. Limitations of the embodiment.

Example one

As shown in FIG. 1, according to the operation control method of an embodiment of the present disclosure, the drive control circuit includes a power factor correction module, and the power factor correction module includes a switch tube to control the AC power supply signal to supply power to the load by outputting an action signal to the switch tube , Operation control methods include:

Step 102: The AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the current state meets the preset switching condition, and the state switching operation is performed at the zero-crossing point, where the state of the action signal includes the output state and the stop output state, The bus voltage is in an upward trend in the output state. In the stop output state, the switch tube stops switching, and the bus voltage is in a downward trend.

In the operation control method suitable for the drive control circuit proposed in the present disclosure, when the action signal is in the output state or in the stop output state, the duration of the current state and the state of the corresponding AC power supply signal are collected separately. At the same time, if the duration of the corresponding current state meets the preset switching condition, the switching operation of the action signal is performed at the zero crossing point, so that after the action signal is in the output state for a period of time, the AC power supply signal The zero-crossing point is switched to the stop output state and maintained for a period of time to complete one operating cycle of the intermittent oscillation mode. On the one hand, by realizing the output of the action signal in the intermittent oscillation mode, the conduction of the PFC switch module in the drive control circuit can be reduced. Power consumption to improve the energy efficiency of electrical equipment (such as air conditioners) using the drive control circuit. On the other hand, it can realize the regular switching of the action signal in the intermittent oscillation mode. On the other hand, the output state is executed at the zero-crossing point. The switching operation can improve the stability of the switching operation. When the output of the action signal is stopped, the energy of the energy storage inductor on the output flow path can be effectively released to prevent impact on the switch tube.

Among them, the preset switching condition is specifically a time condition, and the action signal is specifically a pulse width modulation signal (ie, a PWM signal).

Specifically, the switching tube can preferably use an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) type power tube, or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal oxide semiconductor power field effect transistor). MOSFET specifically includes SiC and GaN devices.

Those skilled in the art can understand that the intermittent oscillation mode can be called intermittent oscillation mode, controllable pulse mode or skip cycle control mode. In the intermittent oscillation mode, the PWM output pulse is periodically Work (that is, the PWM is in the output state) or stop (that is, the PWM is in the stop output state), so as to improve the operating efficiency of the load by reducing the number of switching and increasing the duty cycle at a constant frequency.

In the above technical solution, optionally, the AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the current state meets the preset switching condition, and the state switching operation is performed at the zero-crossing point, which specifically includes: if the action signal is at Output status, record the first duration of the output status; AC power supply signal reaches any zero-crossing point, and the first duration meets the first preset switching condition, the output action signal will stop at the current zero-crossing point; if the action signal is in the stop output state, Record the second duration of the stopped output state; the AC power supply signal reaches any zero-crossing point, and the second duration meets the second preset switching condition, then the output action signal is turned on at the current zero-crossing point.

Specifically, if the collected AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the state meets the preset switching condition, the state of the action signal is switched at the zero-crossing point, which specifically includes: if the action signal is in the output state , The first duration of the output state is recorded; if the collected AC power signal reaches any zero-crossing point, and the first duration meets the first preset switching condition, the output of the action signal will be stopped at the current zero-crossing point; if the action signal is in the stop output state , Record the second duration of the stop output state; if the collected AC power supply signal reaches any zero-crossing point and the second duration meets the second preset switching condition, the output action signal will be turned on at the current zero-crossing point.

In this embodiment, by setting the first preset switching condition and the second preset switching condition, respectively, the switching corresponding to the action signal from output to stop output state and the switch from stop output to output state are switched to When the collected first duration meets the first preset switching condition, switch from the output to the stop output state, and when the collected second duration meets the second preset switching condition, switch from the stop output to the output state to achieve the zero-crossing point Precise switching.

Example two

Fig. 2 shows a schematic flowchart of an operation control method of another embodiment of the present disclosure.

As shown in FIG. 2, the operation control method of another embodiment of the present disclosure includes:

Step 202: Collect operating power consumption of the load;

Step 204: Determine the rising rate of the bus voltage in the drive control circuit in the output state according to the operating power consumption of the load;

Step 206: Determine the first maximum duration according to the ascent rate, and use the first maximum duration as the first preset switching condition;

Step 208: Determine, according to the operating power consumption of the load, the rate of decrease of the bus voltage in the drive control circuit when the output is stopped;

Step 210: Determine the second maximum duration according to the drop rate, and use the second maximum duration as the second preset switching condition.

Step 212: Determine a zero-crossing switching point according to the first maximum duration or the second maximum duration.

In this embodiment, the operating power consumption of the load is collected, and the rising rate of the bus voltage when the PWM of the power factor correction module (PFC module) is in the output state is determined according to the operating power consumption of the load, and then the PWM of the PFC module is determined to be in the output state. Corresponding to the first maximum duration, the first maximum duration indicates the maximum duration of the PWM signal output state and the stop output state that can ensure the normal operation of the load. In the output state, the load is supplied through the power supply signal or the load is supplied through the bus capacitor to collect AC Power supply signal, and determine whether to switch the PWM output state of the PFC at the zero-crossing point of the AC power supply signal.

In the output state, it can be further divided into two working modes: one mode is to supply power to the energy storage inductor, bus capacitor and load through the power supply signal, that is, the energy storage inductor is in the discharge mode, and the other mode is to supply power to the storage inductor through the power supply signal. It can charge inductively and supply power to the load through the bus capacitor, that is, the inductive charging mode. The switching between the two working modes is realized by the high-frequency switching action of the switch tube in the PFC switch module. When the PWM signal is in the output state, the bus voltage The overall trend is on the rise.

In addition, those skilled in the art can also understand that for different loads, the collected operating power consumption is also different, but regardless of any type of load, when the drive control circuit in this application is used as the drive control circuit, because All energy is converted into other forms of energy (such as mechanical energy), so as a simpler collection method, the load current is used as the operating power consumption to calculate the rate of change of the bus voltage in the current operating power consumption collection period. Get more real-time feedback.

In this embodiment, the operating power consumption of the load is collected, and the rate at which the bus voltage rises when the PWM of the PFC is in the output state and the rate at which the bus voltage decreases when the PWM of the PFC is in the stop output state is determined according to the operating power consumption of the load. Determine the first maximum duration of the PFC PWM output state and the second maximum duration of the off state, collect the AC power supply signal, and determine whether to switch the PWM output state of the PFC at the zero-crossing point of the AC power supply signal, by setting the first maximum The duration is long to ensure that the PFC module is in a shutdown state, that is, between the power supply signal and the load, and the normal execution of the power supply to the load through the bus capacitor, thereby realizing the normal operation of the intermittent oscillation mode.

Example three

Fig. 3 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure.

As shown in FIG. 3, the operation control method according to still another embodiment of the present disclosure includes:

Step 302: If the collected AC power supply signal reaches the zero-crossing point, calculate the sum of the first duration and the AC half-wave duration to be experienced, and determine it as the sum of the first duration;

Step 304: Determine whether the sum of the first duration is greater than the first maximum duration;

Step 306: If it is determined that the sum of the first duration is greater than the first maximum duration, control to stop outputting the action signal.

In this embodiment, the AC power supply signal is collected to determine whether it has reached the zero-crossing point of the half-wave of the AC power supply signal (a positive or negative half-cycle of the AC signal is defined as a half-wave). When the AC power supply signal reaches the zero-crossing point of the half-wave , Predict whether the zero-crossing time of the next half-wave of the AC power supply signal is greater than the first maximum duration of the PWM in the output state, when the zero-crossing time of the next half-wave of the AC power supply signal is greater than the first maximum duration of the PWM in the output state , Turn off the PWM output to complete the switching operation from turning on the output to stopping the output. By entering the intermittent state, the conduction loss of the switch tube is reduced.

Example four

Fig. 4 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure.

As shown in FIG. 4, the operation control method according to still another embodiment of the present disclosure includes:

Step 402, if the collected AC power supply signal reaches the zero-crossing point, count the number of half waves experienced by the AC power supply signal in the output state;

Step 404: If the number of half-waves collected is an even number, collect whether the sum of the first duration is greater than the first maximum duration;

Step 406: If the sum of the collected first duration is greater than the first maximum duration, control to stop outputting the action signal.

In this embodiment, the AC power supply signal is collected to determine whether the zero-crossing point of the half-wave of the AC power supply signal is reached. When the AC power supply signal reaches the zero-crossing point of the half-wave, it is judged whether the current half-wave is the even-numbered half-wave within the duration of the PWM output current on state. When the current half-wave of the AC power supply signal is within the duration of the PWM output current on state For the even number of half-waves, predict whether the zero-crossing time of the next half-wave of the AC power supply signal is greater than the maximum duration of the PWM output state. When the zero-crossing time of the next half-wave under the AC power supply signal is greater than the maximum duration of the PWM output state, turn off the PWM output, and collect the even number of half-waves to ensure that the number of positive and negative half-waves are the same, thereby preventing DC generation Weight.

Example five

Fig. 5 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure.

As shown in FIG. 5, the operation control method according to another embodiment of the present disclosure includes: collecting whether the rising rate is less than a first rate threshold; if the rising rate is less than the first rate threshold, adjusting the duty cycle of the action signal to Increase in the second half of the cycle of the AC power supply signal to increase the ascent rate to greater than or equal to the first rate threshold. Specifically include the following steps:

Step 502, collect whether the rising rate is less than the first rate threshold, if the collection result is "yes", go to step 504, if the collection result is "no", go to step 506;

Step 504: If the rising rate is less than the first rate threshold, adjust the duty cycle of the action signal to increase in the next half-wave period of the AC power supply signal so that the rising rate is increased to be greater than or equal to the first rate threshold, and continue Go to step 506;

Step 506, if the ascent rate is greater than or equal to the first rate threshold, whether the collection ascent rate is greater than the second rate threshold, if the collection result is "Yes", go to step 508, if the collection result is "No", go to step 516 ；

Step 508: If the rising rate is greater than the second rate threshold, adjust the duty cycle of the action signal to decrease in the next half-wave period of the AC power supply signal;

Step 510, collect whether the adjusted duty cycle is less than the lower threshold of the duty cycle, if the collection result is "yes", go to step 512, if the collection result is "no", go to step 514;

Step 512: If the duty cycle is less than the lower threshold of the duty cycle, determine the lower threshold of the duty cycle as the actual duty cycle of the action signal, where the second rate threshold is greater than the first rate threshold;

Step 514: Collect the adjusted operating power consumption of the load to update the first maximum duration according to the adjusted operating power consumption.

Step 516: Maintain the current duty cycle.

The second rate threshold is greater than the first rate threshold.

Among them, the first rate threshold indicates the lower limit rising rate that can meet the power supply capability to the load and the power supply capability to the bus capacitor when the PWM signal is in the output state, that is, when the rate is greater than or equal to the first rate threshold, the intermittent oscillation mode can be guaranteed Normally realized.

In this embodiment, if the collected rate of rise is less than the first rate threshold, it indicates that the current rate of change of the bus voltage cannot meet the normal power supply requirements for the load, energy storage inductance, and bus capacitance. By increasing the duty cycle, the rate of rise is increased. To meet the power demand.

In any of the foregoing embodiments, optionally, the method further includes: collecting the adjusted operating power consumption of the load after controlling to increase the duty cycle, so as to update the first maximum duration according to the adjusted operating power consumption.

In this embodiment, after increasing the duty cycle, the operating power consumption is re-collected, and the first maximum duration is updated according to the operating power consumption, so as to determine whether to re-determine the intermittent oscillation mode according to the updated first maximum duration. Zero-crossing switching point.

In this embodiment, the second rate threshold is used to characterize whether excessive energy consumption occurs, that is, if the current rate of rise is greater than the second rate threshold, it indicates that the load is small and the ratio of conduction loss to the total power has exceeded the specified ratio , That is, a large conduction loss occurs. At this time, the duty cycle is reduced to achieve the effect of reducing conduction loss.

Further, after controlling the reduction of the duty cycle, it is necessary to prevent the duty cycle from being too low. Therefore, the duty cycle lower threshold is combined with the duty cycle lower threshold, the first rate threshold and the second rate threshold to ensure that the load At the same time of normal power supply, the purpose of reducing the power consumption of the switch tube is achieved.

In this embodiment, after reducing the duty cycle, the operating power consumption is recollected, and the first maximum duration is updated according to the operating power consumption, so as to determine whether to re-determine the intermittent oscillation mode according to the updated first maximum duration. The zero-crossing switching point.

Specifically, the operating power consumption of the load is collected, and the rate v at which the bus voltage rises when the PWM of the PFC module is in the output state is calculated. When v is less than the first rate threshold v1, the duty cycle D of the PWM output increases by △D1, and Re-collect the operating power consumption of the load, and calculate the rate v at which the bus voltage rises when the PWM of the PFC is in the output state, until v is greater than or equal to the first rate threshold v1, when v is greater than the second rate threshold v2, the duty cycle of the PWM output D reduces ΔD2, and recollects the operating power consumption of the load, and calculates the rate v of the bus voltage rise when the PWM of the PFC is in the output state, until v is less than or equal to the second rate threshold v2.

Wherein, the first rate threshold v1 and the second rate threshold v2 are respectively the minimum and maximum values of a reasonable range of a rate at which the bus voltage rises when the PWM of the PFC is in the output state. When the duty cycle D of the PWM output is less than or equal to the lower duty cycle threshold D _min , the duty cycle D of the PWM output takes the duty lower threshold D _min .

Example Six

Fig. 6 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure.

As shown in FIG. 6, the operation control method according to another embodiment of the present disclosure includes:

Step 602: If the collected AC power supply signal reaches the zero-crossing point, calculate the sum of the second duration and the AC half-wave duration to be experienced, and determine it as the sum of the second duration;

Step 604: Determine whether the sum of the second duration is greater than the second maximum duration;

Step 606: If it is determined that the sum of the second duration is greater than the second maximum duration, it is determined that the second maximum duration satisfies the second preset switching condition, and the output action signal is controlled to be turned on.

In this embodiment, the AC power supply signal is collected to determine whether it reaches the zero-crossing point of the half-wave of the AC power supply signal. When the AC power supply signal reaches the zero-crossing point of the half-wave, it is predicted whether the zero-crossing time of the next half-wave of the AC power supply signal is greater than PWM The maximum duration of the output stop state. When the zero-crossing time of the next half-wave of the AC power supply signal is greater than the maximum duration of the PWM stop output state, the PWM output is turned on, so as to realize the start output of the PWM signal at the zero-crossing point.

In any of the foregoing embodiments, optionally, the method further includes: determining, according to the operating power consumption of the load, the rate of decrease of the bus voltage in the drive control circuit in a stopped output state; and determining the second maximum duration according to the rate of decrease.

In any of the above embodiments, optionally, the load is a compressor, the operating power consumption of the load is the three-phase current of the compressor, a bus capacitor is provided in the drive control circuit, and the voltage across the bus capacitor is determined as the bus voltage , Also includes: determining the operating power consumption of the compressor according to the three-phase current; determining the rate of change of the bus voltage according to the operating power consumption. The rate of change includes the rising rate and the falling rate. If the pulse width modulation signal is in the output state, the AC power supply The signal or bus capacitance supplies power to the load, and the bus voltage as a whole rises, and the rate of change is the rising rate. If the pulse width modulation signal enters the stop output state, the load is supplied through the bus capacitance, and the bus voltage is in a falling state, and the rate of change is the rate of decrease.

In this embodiment, the compressor line current is collected by setting a current sensor to determine the operating power consumption of the load based on the collected current value, thereby determining the rate of change of the bus voltage based on the operating power consumption.

Example Seven

As shown in FIG. 7, the operation control method according to an embodiment of the present disclosure is applicable to a drive control circuit. The drive control circuit includes a power factor correction module. The power factor correction module includes a switch tube to output pulse width modulation to the switch tube. Signal control The power supply signal supplies power to the load. The operation control methods include:

Step 702: Determine the rate of change of the bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load, so as to determine the switching time point of the action signal state according to the rate of change, where the action signal state includes output state and stop In the output state, the bus voltage is in an upward trend in the output state. In the stop output state, the switch tube stops switching, and the bus voltage is in a downward trend.

In the foregoing embodiment, optionally, determining the rate of change of the bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load to determine the switching time point of the action signal state according to the rate of change specifically includes: The operating power consumption is detected according to the preset detection period; the change rate of the bus voltage in the current detection period is determined according to the operating power consumption; the switching time point of the action signal state is determined according to the change rate and the preset voltage limit threshold.

In the operation control method suitable for the drive control circuit proposed in the present disclosure, during the operation of the load driven by the drive control circuit, the operating power consumption of the load is collected to determine the power consumption of the load and the power supply signal on the input side. Calculate the rate of change of the bus voltage based on the output power of the bus, and determine the control strategy for the action signal based on the rate of change of the bus voltage. When the change trend of the bus voltage is detected to meet the state switching conditions of the action signal, determine the switching time point, and The state switching operation is performed. In the state of outputting an action signal (specifically, a pulse width modulation signal, that is, a PWM signal) to the switch tube, the bus voltage is in a rising trend, and when the output of the action signal to the switch tube is stopped, the bus voltage is at The downward trend, which in turn enables the adaptation between the control side of the action signal and the control auxiliary power supply, so that the output state of the action signal and/or the duration of the stop output state can be adjusted when the power is supplied to the load with different power consumption. The adjustment can reduce the loss of the switching device when controlling the power supply to the load with low power consumption, improve the operating efficiency of the drive control circuit, and further improve the energy efficiency of electrical equipment such as air conditioners using the drive control circuit.

Further, based on the preset detection period, the state switching time point of the pulse width modulation signal is usually completed in the current detection period, and when the voltage variation satisfies the preset condition, the switching operation is performed to obtain a regular and clear output The state switching time point, so as to realize the burst (intermittent oscillation) mode control based on the detection period and the size of the load power consumption. By entering the burst mode, the conduction power consumption of the PFC switch module in the drive control circuit is reduced to improve the use of this drive control. The energy efficiency of electrical equipment such as circuit air conditioners.

Specifically, the bus voltage can be regarded as the power supply voltage to the load. The power supply signal can be the AC power supply signal of the mains or the DC power supply signal rectified by the rectifier. The preset detection period is used to collect based on the detection period. The operating power consumption of the load, and to calculate the rate of change of the bus voltage of the bus capacitance, so that after the current detection cycle is completed, through the estimation of the voltage change of the next detection cycle, determine whether to switch the output state of the PWM signal, And after determining the switching output state, determine the corresponding switching time point, that is, if switching, the switching time point of the output state after the current detection cycle is completed, to complete the switching operation, through the PWM signal at the corresponding switching time point The switching of the output state realizes the control execution of the intermittent oscillation mode.

Those skilled in the art can understand that the burst mode can be called intermittent oscillation mode, controllable pulse mode or skip cycle control mode. In burst mode, the PWM output pulse is periodically effective ( That is, the PWM is in the output state) or invalid (that is, the PWM is in the stop output state), so as to improve the operating efficiency of the load by reducing the number of switching and increasing the duty cycle at a constant frequency.

In addition, those skilled in the art can also understand that for different loads, the collected operating power consumption is also different, but regardless of any type of load, when the drive control circuit in this application is used as the drive control circuit, because All energy is converted into other driving energy (such as mechanical energy). Therefore, as a simpler collection method, the load current is used as the operating power consumption to calculate the rate of change of the bus voltage in the current detection cycle, which can get more real-time feedback of.

In the above embodiment, optionally, the rate of change includes a rate of increase and a rate of decrease. The rate of change of the bus voltage in the current detection period is determined according to the operating power consumption, which specifically includes: if the action signal is in the output state, according to the power supply signal Input power and operating power consumption determine the rate of rise of the bus voltage.

In this embodiment, the active PFC circuit is provided with an energy storage inductor and a bus capacitor. The bus voltage is the voltage across the bus capacitor. When the PWM signal is in the output state, it can be further divided into two working modes: one mode It is to supply power to the energy storage inductor, bus capacitor and load through the power supply signal, that is, the energy storage inductor is in the discharge mode. The other mode is to charge the energy storage inductor through the power supply signal and power the load through the bus capacitor, that is, the inductor charging mode. The switching of the two working modes is realized by the switching action of the switch tube in the PFC switch module. When the PWM signal is in the output state, the overall bus voltage is in an upward trend. When the PWM signal is in the stop output state, the power supply signal and The load is equivalent to being in a cut-off state, and the load is supplied with power through the bus capacitance. Because the bus capacitance is discharged, the bus voltage is in a downward trend.

Specifically, the drive control circuit includes a power factor correction module. For the active drive control circuit, the power factor correction module includes a bridge rectifier. The first output end of the bridge rectifier is connected in series with an energy storage inductor, a current limiting diode, and Bus capacitor, the cathode of the current limiting diode is connected to one end of the bus capacitor, the common connection point between the energy storage inductor and the current limiting diode is connected to the first end of the switch tube, and the second end of the switch tube and the other end of the bus capacitor are both Connected to the second output terminal of the bridge rectifier.

Based on the above description, the current working state of the PWM signal is further combined to determine whether to perform the state switching operation. Since the bus voltage is rising in the overall trend when the PWM signal output is in the on state, the rise of the bus voltage is calculated according to the operating power consumption rate.

In any of the foregoing embodiments, optionally, determining the switching time point of the action signal state according to the rate of change and the preset voltage limit threshold includes: starting from the moment when the output of the action signal is turned on, determining each detection period according to the rising rate After at least one detection period, determine the cumulative increase of the bus voltage in the current output state according to the voltage increase; if the cumulative increase of the voltage is greater than or equal to the preset voltage limit threshold, the control stops the output action Signal; if the accumulated voltage rise is less than the preset voltage limit threshold, the action signal will continue to be output.

Among them, those skilled in the art can understand that the previous voltage rise is the cumulative voltage rise before the current detection period when the pulse width modulation signal continues to be in the output state. If the current detection period is switched to the pulse width modulation signal In the first detection cycle after the output state, the previous voltage rise is the initialized voltage rise, and the initialized voltage rise can usually be set to 0.

In any of the foregoing embodiments, optionally, determining the switching time point of the action signal state according to the rate of change and the preset voltage limit threshold value, and specifically includes: if the accumulated voltage rise is less than the preset voltage limit threshold value, then according to the first The predicted gain coefficient predicts the estimated voltage rise in the next detection period; if the sum of the cumulative voltage rise and the estimated voltage rise is greater than or equal to the preset voltage limit threshold, the control stops outputting the action signal.

In any of the foregoing embodiments, optionally, the first prediction gain coefficient is greater than or equal to 1, and less than or equal to 2.

In any of the above embodiments, optionally, it further includes: if the sum of the accumulated voltage rise and the estimated voltage rise is less than the preset voltage limit threshold, continuing to collect input power and operating power consumption in the next detection period, and Update the real-time bus voltage value according to the input power and operating power consumption.

In this embodiment, the increase in the bus voltage in the next detection cycle is predicted by the increase rate, that is, the estimated voltage increase, to determine whether to change the working state of the PWM signal based on the estimated voltage increase and the current voltage increase Switching to stop output, specifically by detecting whether the cumulative increase reaches the preset voltage limit threshold, to determine whether the switching condition of the PWM output signal is met, that is, based on the estimated voltage increase to determine if the PWM signal output is stopped, and the power supply is purely through the bus capacitor Whether it can meet the operating requirements of the current load so that when the operating requirements are met, the output of the PWM signal is controlled to stop, that is, the control signal is not input to the switch tube to achieve the purpose of reducing the number of switching times.

Specifically, the initial value of the bus voltage is initialized, that is, before the first detection cycle, the previous voltage rise U ₁₀ =0, the operating power consumption of the load is detected, the rise rate V _{1 of the} bus voltage is calculated, and the bus is determined The increase in voltage ΔU ₁ = U ₁₀ +V ₁ *T, where T is the load detection period, when the increase in bus voltage ΔU _{1 is} greater than or equal to the upper limit of the change in bus voltage ΔU _max (that is, the preset When the voltage limit threshold), the PWM output is turned off. When the rise of the bus voltage △U ₁ (that is, the actual cumulative voltage rise) is less than the upper limit of the change of the bus voltage △U _max , the rise of the bus voltage in the next load detection cycle is predicted according to the rise rate V ₁ , namely Estimated voltage rise △U _pre1 =k ₁ *V ₁ *T, where k ₁ is the first predictive gain coefficient, and the selection range is [1, 2] to obtain the estimated cumulative voltage rise △U _p1 =△U ₁ +U _pre1 , when △U _{p1 is} greater than or equal to the upper limit value of the bus voltage change △U _max , the PWM output is controlled to switch off the PWM output state. When △U _{p1 is} less than △U _max , Then, according to the detection result of the next detection cycle, determine the updated △U ₁ (that is, the actual voltage accumulation) and △U _p1 (the estimated cumulative voltage rise) and △U _max in order to determine whether to switch the output state.

In any of the above embodiments, optionally, determining the rate of change of the bus voltage in the current detection period according to the operating power consumption, specifically including: if the action signal is in the stop output state, determining that the bus voltage is in the current state according to the operating power consumption The rate of decrease in the detection period.

In this embodiment, when the PWM signal output is in a stopped output state, the bus voltage is in a decreasing state because the bus capacitance is discharged to supply power to the load. Therefore, the decrease rate of the bus voltage needs to be calculated according to the operating power consumption.

In any of the above embodiments, optionally, determining the switching time point of the action signal state according to the rate of change and the preset pressure limit threshold, specifically including: starting from the moment when the output of the action signal is turned off, according to the drop rate and the corresponding detection The cycle determines the voltage drop of each detection cycle, so that after at least one detection cycle, the voltage drop of each detection cycle determines the cumulative voltage drop of the bus voltage in the current stop output state; if the cumulative voltage drop is greater than or When it is equal to the preset voltage limit threshold, it controls to turn on the output action signal.

Among them, those skilled in the art can understand that the previous voltage drop is the cumulative voltage drop before the current detection cycle when the pulse width modulation signal continues to be in the stop output state. If the current detection cycle is switched to pulse width modulation In the first detection cycle after the signal stops outputting, the previous voltage drop is the initialized voltage drop, which can usually be set to 0.

In any of the foregoing embodiments, optionally, determining the switching time point of the action signal state according to the rate of change and the preset voltage limit threshold, specifically further includes: if the accumulated voltage drop is less than the preset voltage limit threshold, then according to the second The predictive gain coefficient predicts the estimated voltage drop in the next detection period; if the sum of the cumulative voltage drop and the estimated voltage drop is greater than or equal to the preset voltage limit threshold, the output action signal is controlled to turn on.

In any of the foregoing embodiments, optionally, the second prediction gain coefficient is greater than or equal to 1, and less than or equal to 2.

In any of the above embodiments, optionally, it further includes: if the sum of the cumulative voltage drop and the estimated voltage drop is less than the preset voltage limit threshold, continue to collect the operating power consumption in the next detection cycle, and then collect the operating power according to the operating power. Consumption updates the value of the real-time bus voltage.

In this embodiment, when the PWM is in the stop output state, the current voltage drop is calculated based on the currently collected operating power consumption, and the voltage drop in the next cycle is estimated based on the current voltage drop. Obtain the cumulative voltage drop, combined with the preset voltage limit threshold to determine the duration of the bus capacitor discharge to maintain the load, so that when the cumulative voltage drop is greater than or equal to the preset voltage limit threshold, it indicates that the capacitor discharge can no longer meet the load. Normal operation, at this time, switch the working state of the PWM to the output state, and re-power the load through the power supply signal to reduce the switching times of the PFC switch module while the PWM is in the stop output state to ensure the normal operation of the load.

Specifically, the initial value of the bus voltage is initialized, that is, before the first detection cycle, the previous voltage drop △U ₂₀ =0, the operating power consumption of the load is detected, the bus voltage drop rate V _{2 is} calculated, and the determination Bus voltage drop △U ₂ =U ₂₀ +V ₂ *T, where T is the detection period of load operation power consumption, when the bus voltage drop △U _{2 is} greater than or equal to the upper limit of the bus voltage change △U _{When max} (that is, the preset voltage limit threshold), the PWM output is turned on. When the bus voltage drop △U ₂ (that is, the actual cumulative voltage drop) is less than the upper limit of the bus voltage change △U _max , predict the bus voltage drop in the next load detection cycle, that is, the estimated voltage drop U _pre2 = k ₂ *V ₂ *T, where the second coefficient k2 is the predicted gain coefficient of the voltage drop, and the selection range is [1, 2] to obtain the estimated cumulative voltage drop △U _p2 ＝△U ₂ +U _pre2 , When △U _{p2 is} greater than or equal to the upper limit of the bus voltage change △U _max , the PWM output is turned on. When △U _{p2 is} less than △U _max , the updated result is determined in turn according to the detection result of the next detection cycle △U ₁ (that is, the actual voltage accumulation), △U _p2 (estimated cumulative voltage rise) and △U _max , determine whether to switch the output state.

In any of the above embodiments, optionally, the load is a compressor, and the load is a compressor, and collecting the operating power consumption of the load according to a preset detection period includes: collecting the line voltage and line current of the compressor according to the detection period ; Determine the operating power consumption in each detection cycle according to the line voltage and line current.

In this embodiment, the detection of the compressor line current is performed by setting a current sensor to determine the operating power consumption of the load based on the detected current value, thereby determining the rate of change of the bus voltage based on the operating power consumption.

In any of the foregoing embodiments, optionally, the power supply signal is an AC power supply signal, and the detection period is an integer multiple of the half-wave period of the AC power supply signal to perform the switching operation at the zero-crossing point of the AC power supply signal.

In this embodiment, the detection period is set corresponding to the signal period of the AC power supply signal, for example, the half period length of the AC power supply signal is determined as the period length of a detection period, so that after a detection period is completed, according to the voltage The prediction result of the variation determines that the switching operation of the PWM output needs to be performed, so that when the switching operation is required, the switching operation is performed at the zero-crossing point of the AC power supply signal to realize the optimized switching mode of the burst mode.

In any of the above embodiments, optionally, the switch tube includes an IGBT-type power tube and a MOSFET, and the MOSFET includes a SiC-MOSFET and a GaN-MOSFET.

Example eight

Fig. 8 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure.

As shown in FIG. 8, the operation control method according to another embodiment of the present disclosure includes:

Step 802: Collect operating power consumption of the load according to a preset operating detection period.

In the foregoing embodiment, optionally, determining the rate of change of the bus voltage in the drive control circuit in the current detection period according to the operating power consumption specifically includes:

In step 804, if the pulse width modulation signal is in the output state, the rise rate of the bus voltage is determined according to the operating power consumption.

As shown in FIG. 8, in any of the foregoing embodiments, optionally, the operating power consumption determines the state switching time point of the pulse width modulation signal according to the change rate and the duration of the detection period, which specifically includes:

Step 806: Calculate the current voltage rise in the current detection period according to the rise rate;

Step 808: Determine the actual cumulative voltage increase according to the current voltage increase and the previous voltage increase;

Step 810: Determine whether the actual cumulative voltage rise is greater than or equal to the preset voltage limit threshold. If the determination result is "Yes", then go to step 818, and if the determination result is "No", then go to step 812.

Among them, the previous voltage rise is the historical accumulated voltage rise when the pulse width modulation signal is in the output state.

In any of the foregoing embodiments, optionally, the operating power consumption determines the state switching time point of the pulse width modulation signal according to the rate of change and the duration of the detection period, which specifically further includes:

Step 812: If it is detected that the actual cumulative voltage increase is less than the preset voltage limit threshold, predict the estimated voltage increase in the next detection period according to the first predicted gain coefficient, where the first predicted gain coefficient is greater than or equal to 1, And less than or equal to 2;

Step 814: Calculate the sum of the current voltage increase and the estimated voltage increase, and determine it as the estimated cumulative voltage increase;

Step 816: Determine whether the estimated cumulative voltage rise is greater than or equal to the preset voltage limit threshold. If the determination result is "Yes", go to step 818, and if the determination result is "No", then return to step 802, that is, if the estimated If the accumulated voltage rise is less than the preset voltage limit threshold, it will return to collect the operating power consumption according to the detection cycle, and update the actual accumulated voltage rise or the estimated accumulated voltage rise according to the operating power consumption; if the actual accumulated voltage rise or estimated The cumulative voltage rise is greater than or equal to the preset voltage limit threshold, and the control stops outputting the pulse width modulation signal at the end of the current detection period;

Step 818, control to stop outputting the pulse width modulation signal when the current detection period ends.

Example 9

Fig. 9 shows a schematic flowchart of an operation control method according to still another embodiment of the present disclosure.

As shown in FIG. 9, the operation control method according to still another embodiment of the present disclosure includes:

Step 902: Collect operating power consumption of the load according to a preset detection period.

In any of the foregoing embodiments, optionally, determining the rate of change of the bus voltage in the drive control circuit in the current detection period according to the operating power consumption specifically includes:

Step 904: If the pulse width modulation signal is in the output stop state, determine the rate of decrease of the bus voltage according to the operating power consumption.

As shown in FIG. 9, in any of the foregoing embodiments, optionally, the operating power consumption determines the state switching time point of the pulse width modulation signal according to the change rate and the duration of the detection period, which specifically includes:

Step 906: Calculate the current voltage drop in the current detection period according to the drop rate;

Step 908: Determine the actual cumulative voltage drop according to the current voltage drop and the previous voltage drop;

Step 910: Determine whether the actual accumulated voltage drop is greater than or equal to the preset voltage limit threshold. If the determination result is "Yes", then go to step 918, and if the determination result is "No", then go to step 912.

Among them, the previous voltage drop is the historical accumulated voltage drop when the pulse width modulation signal is in the output stop state.

Step 912: If it is detected that the actual accumulated voltage drop is less than the preset voltage limit threshold, predict the estimated voltage drop in the next detection period according to the second predicted gain coefficient, where the second predicted gain coefficient is greater than or equal to 1, And less than or equal to 2;

Step 914: Calculate the sum of the current voltage drop and the estimated voltage drop, and determine it as the estimated cumulative voltage drop;

Step 916: Determine whether the estimated cumulative voltage drop is greater than or equal to the preset voltage limit threshold. If the result of the determination is "Yes", go to step 918, and if the result of the determination is "No", then return to step 902, that is, if the estimated If the cumulative voltage drop is less than the preset voltage limit threshold, it will return to collect the operating power consumption according to the detection cycle, and update the actual cumulative voltage drop or the estimated cumulative voltage drop according to the operating power consumption; if the actual cumulative voltage drop or estimated The cumulative voltage drop is greater than or equal to the preset voltage limit threshold, and the pulse width modulation signal is controlled to start output at the end of the current detection period.

Step 918, control to start outputting a pulse width modulation signal when the current detection period ends.

Predict the rise of the bus voltage in the next detection cycle by the rise rate, that is, the estimated voltage rise, to determine whether to switch the working state of the PWM signal to stop output based on the estimated voltage rise and the current voltage rise. Determine whether the switching condition of the PWM output signal is satisfied by detecting whether the cumulative rise has reached the preset voltage limit threshold, that is, based on the estimated voltage rise, it is judged whether the current load can be satisfied by the power supply of the bus capacitor if the PWM signal output is stopped. To achieve the purpose of reducing the number of switching times, the output of the PWM signal is controlled to stop when the operation demand is met, that is, no control signal is input to the switch tube.

In any of the above embodiments, optionally, the load is a compressor, the operating power consumption of the load is the three-wire current of the compressor, and a bus capacitor is provided in the drive control circuit, and the bus voltage in the drive control circuit is determined according to the operating power consumption. The rate of change in the current detection cycle includes: determining the operating power consumption of the compressor according to the three-wire current; determining the rate of change according to the operating power consumption, where, if the pulse width modulation signal is in the output state, the power supply signal or bus capacitance When power is supplied, the overall bus voltage is rising, and the rate of change is the rising rate. If the pulse width modulation signal is in the stop output state, and the load is supplied through the bus capacitor, the bus voltage is falling, and the rate of change is the falling rate.

In any of the foregoing embodiments, optionally, the power supply signal is an AC power supply signal, and the detection period is set corresponding to the signal period of the power supply signal to perform the switching operation of the output state of the pulse width modulation signal at the zero-crossing point of the AC power supply signal.

The foregoing embodiment describes the technical solution of how to determine the switching point of the action signal state in the intermittent oscillation control mode. The following describes how to perform switching control in the intermittent oscillation control mode and the uncontrolled rectification mode in conjunction with Embodiment 10 to Embodiment 12.

Example ten

As shown in FIG. 10, the operation control method according to an embodiment of the present disclosure is applicable to a drive control circuit. The drive control circuit includes a power factor correction module, and the power factor correction module includes a switch tube to output high-frequency actions to the switch tube. Signal control The power supply signal supplies power to the load. The operation control methods include:

Step 1002, obtain the operating parameters of the load;

Step 1004: It is detected that the operating parameter is less than the first parameter threshold, and the switch tube is switched on and off according to the first control mode;

Step 1006: It is detected that the operating parameter is greater than or equal to the first parameter threshold, and the switching tube is controlled to open and close according to the second control mode. The first control mode is the uncontrolled rectification mode. In the uncontrolled rectification mode, multiple switches are not Tube input action signal, the second control mode is intermittent oscillation control mode.

In this embodiment, in the process of controlling the AC power supply signal to supply power to the load through the power factor control module, for the load with low power consumption, if the high-frequency control signal is continuously output to the switch tube, unnecessary switching loss will be increased. , By collecting the operating parameters of the load to determine the size of the load according to the operating parameters, combined with the first parameter threshold of the same type as the operating parameters, the first parameter threshold is used as the load size division standard. Specifically, when the operation is detected When the parameter is less than the threshold value of the first parameter, it indicates that the uncontrolled rectification mode can ensure the normal power supply of the AC power signal to the load. When the operating parameter is detected to be greater than or equal to the threshold value of the first parameter, it indicates that the intermittent oscillation control mode is required to be used. The switch tube in the power factor correction module outputs a high-frequency action signal to achieve efficient control of the load power supply. For the first control mode, since there is no need to output a high-frequency control signal to the switch tube, no switching loss occurs. For the second control mode, since only the high-frequency action signal is output to the switch tube intermittently, the conduction loss can also be reduced compared to the continuous output control mode.

Among them, the high-frequency action signal is specifically a pulse width modulation signal (ie, Pulse Width Modulation Control, PWM signal).

The multi-pulse control mode means that no control signal is output to the switch tube, but the rectified output is realized by the freewheeling diode in anti-parallel with the switch tube, which is suitable for small load applications.

The intermittent oscillation control mode is to determine the output duration and stop output duration of the high-frequency operating signal of the switching tube according to the DC bus voltage. The output duration and the stop output duration will maintain multiple half-wave durations of multiple AC power signals And preferably, the switching operation of the output state is performed at the zero-crossing point of the AC power supply signal, so as to achieve reduced switching loss and improve the efficiency of power factor correction.

Specifically, in the output state, the entire half cycle is in the alternate switching state, and in the stop output state, the entire half cycle stops output.

In addition, the switch tube can preferably use IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) type power tube, or MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal oxide semiconductor power field effect transistor), And SiC-MOSFET and GaN-MOSFET devices.

In the above embodiment, optionally, multiple switch tubes are constructed to form a bridge module, and the switch tubes of each bridge arm of the bridge module are sequentially denoted as the first switch tube, the second switch tube, and the third switch tube. And the fourth switch tube, where the common terminal between the first switch tube and the second switch tube is connected to the first input line of the AC power supply signal, and the common terminal between the third switch tube and the fourth switch tube is connected to the AC The second input line of the power supply signal, and the common end between the first switch tube and the third switch tube is connected to the high-voltage line of the bus signal, and the common end between the second switch tube and the fourth switch tube is connected to the bus signal The bus capacitor is connected between the high voltage line and the low voltage line, and the voltage across the bus capacitor is determined as the bus voltage of the load. Among them, each switch tube is also connected in reverse parallel with a freewheeling diode. In the first control mode Next, by controlling the freewheeling diode to conduct, the rectification operation of the AC power supply signal is performed.

In this embodiment, for the bridgeless totem pole type power factor correction module, since the bridgeless totem pole type power factor correction module has multiple switch tubes, its control logic is relative to the boost type power factor correction module (BOOST-PFC) It is more complicated, and therefore it is more necessary to improve the efficiency of power factor correction and reduce switching power consumption through the first control mode and the second control mode that are different from the continuous high-frequency output control method in the prior art.

Shown in Figure 21, U _S AC power signal, I _S corresponding supply current, the controlled rectifier mode, no high frequency output to the switch control signal, so the power factor correction module totem cylindrical considered can be simplified by the The rectifier module composed of four diodes, according to the unidirectional conduction characteristic of the freewheeling diode, realizes power supply output when the voltage across the freewheeling diode is greater than the conduction voltage, and supplies power to the bus capacitor and load through the AC power supply signal. The AC power supply signal is not boosted, so the power supply control to the small load can be realized. On the other hand, since the switching control of the switching tube is not involved, it is beneficial to reduce the conduction loss of the switching tube.

Example 11

In any of the foregoing embodiments, optionally, detecting that the operating parameter is greater than or equal to the first parameter threshold, and controlling the opening and closing of multiple switch tubes according to the second control mode includes: obtaining the bus voltage of the load; The relationship between the preset lower limit voltage threshold and the preset upper limit voltage threshold is determined to determine the intermittent oscillation control strategy of the second control mode to control whether to output high-frequency actions to the first switching tube and the second switching tube according to the intermittent oscillation control strategy Signal to enable the bus voltage to change between the preset lower limit voltage threshold and the preset upper limit voltage threshold, where the preset upper limit voltage threshold is greater than the preset lower limit voltage threshold.

In this embodiment, in the second control mode, by separately defining the preset lower limit voltage threshold and the preset upper limit voltage threshold, the normal variation range of the bus voltage is defined, as long as the bus voltage is within the normal variation range, that is, It can ensure the normal operation of the load. Under the premise of ensuring the normal operation of the load, the corresponding burst (intermittent oscillation) mode control strategy can be set for the change of the bus voltage, that is, the intermittent oscillation control strategy, so as to be controlled by the intermittent oscillation control strategy. The high-frequency action signal is in an intermittent output state, that is, the high-frequency action signal does not need to be continuously in the output state, that is, the switch tube does not need to be continuously in the high-frequency action switch state, which can reduce the power factor correction module in the drive control circuit. Power consumption to improve the energy efficiency of electrical equipment (such as air conditioners) using the drive control circuit.

Among them, the high-frequency action signal may specifically be a pulse width modulation signal (ie, a PWM signal). Obtaining the bus voltage of the load can be achieved by setting a bus voltage detection module, or it can be determined based on the operating parameters by collecting the operating parameters of the load.

In addition, the intermittent oscillation control strategy defined in this application is applicable to both boost (boost mode) power factor correction modules and totem pole type power factor correction modules.

Those skilled in the art can understand that the bus voltage can be regarded as the power supply voltage to the load, and the power supply signal can be the AC power supply signal of the mains or the DC power supply signal rectified by the rectifier, passing a limited preset lower limit The voltage threshold and the preset upper limit voltage threshold, and the threshold interval formed by the lower limit voltage threshold and the preset upper limit voltage threshold, ensure the reliability of the drive control circuit to supply power to the load. The interval is formed based on the lower limit voltage threshold and the preset upper limit voltage threshold. The oscillation control strategy reduces the conduction loss of the switch tube and can improve the execution efficiency of power factor correction.

In the foregoing embodiment, optionally, according to the relationship between the bus voltage and the preset lower limit voltage threshold, and the preset upper limit voltage threshold, the corresponding intermittent oscillation control strategy is determined, which specifically includes: If the high-frequency action signal is in stop output State, and detecting that the bus voltage has dropped to less than or equal to the preset lower voltage threshold, control to output a high-frequency action signal to the switch tube to control the rise of the bus voltage to approach the upper voltage threshold.

In this embodiment, the drive control circuit is provided with an energy storage inductor and a bus capacitor. The bus voltage is the voltage across the bus capacitor. Under the premise that the high-frequency action signal is stopped, the power supply signal and the load are equivalent to In the off state, power is supplied to the load through the bus capacitor. Because the bus capacitor is discharged, the bus voltage is in a downward trend. If the bus voltage is detected to be less than or equal to the preset lower limit voltage threshold, the control is turned on to output a high-frequency action signal to the switch tube , Through the high-frequency action of the switch tube, the power supply signal can supply power to the load, so that the bus voltage can be in an upward trend. On the one hand, by controlling the high-frequency action signal to stop the output state, the power consumption of the switch tube is reduced, and the other On the one hand, by detecting that the bus voltage drops below or equal to the preset lower limit voltage threshold, the state switching operation of the high-frequency action signal is executed to realize the formulation of the intermittent oscillation control strategy, thereby ensuring the reliability of the power supply to the load.

Specifically, the duration from the stop of outputting the high-frequency action signal to the switching tube to the restarting of the output of the high-frequency action signal, that is, the length of time the switching tube stops operating within one bus voltage change period.

Among them, those skilled in the art can understand that enabling the bus voltage to vary between the preset lower voltage threshold and the preset upper voltage threshold does not completely guarantee that the bus voltage is not less than the preset lower voltage threshold at all, but only as long as it is detected When it is close to the preset voltage lower limit threshold or less than the preset voltage lower limit threshold, the state of switching the high-frequency action signal can be started, that is, the high-frequency action signal output to the switch tube is started to realize the boost of the bus voltage, so that the bus voltage can be restored. Rise above the preset voltage lower limit threshold.

In any of the foregoing embodiments, optionally, the corresponding intermittent oscillation control strategy is determined according to the relationship between the bus voltage and the preset lower limit voltage threshold and the preset upper limit voltage threshold, which specifically includes: In the output state, and it is detected that the bus voltage has risen to be greater than or equal to the preset upper limit voltage threshold, the control stops outputting high-frequency action signals to the switch tube until the bus voltage drops to less than or equal to the preset lower limit voltage threshold to complete the bus voltage A cycle of change.

In this embodiment, when the high-frequency action signal (ie, the PWM signal) is in the output state, it can be further divided into two working modes: one mode is shown in Figure 17, and the energy storage inductor and the bus capacitor The energy storage inductor is in the discharge mode as shown in Figure 18. The other mode is shown in Figure 18. The energy storage inductor is charged through the power supply signal, and the load is supplied through the bus capacitor, which is the inductor charging mode. The switching between the two working modes is It is realized by the high frequency switching action of the switch tube in the power factor correction module. When the PWM signal is in the output state, the overall bus voltage is in an upward trend. Therefore, when the bus voltage is rising, it is necessary to detect whether the bus voltage rises to When it is equal to or exceeds the preset upper limit voltage threshold, the control stops outputting the high-frequency action signal to the switch tube. At this time, the power supply signal is disconnected from the load, and the load is supplied through the discharge of the bus capacitor. Therefore, the bus voltage is in a decreasing state. By controlling to stop outputting high-frequency action signals to the switch tube, the switching function of high-frequency action signals between output and stop output is realized, so as to realize the formulation of intermittent oscillation control strategies. On the other hand, it is controlled on the basis of satisfying load power supply. Stop outputting high-frequency action signals, reducing the loss of switching devices.

Among them, those skilled in the art can understand that enabling the bus voltage to change between the preset lower limit voltage threshold and the preset upper limit voltage threshold does not completely guarantee that the bus voltage does not exceed the preset upper limit voltage threshold at all, but as long as it is detected When the preset voltage upper threshold is approaching or exceeds the preset voltage upper threshold, the state of switching high-frequency action signals can be started, that is, the high-frequency action signal is stopped outputting to the switch tube to realize the step-down of the bus voltage so that the bus voltage can be restored. Falling below the preset upper voltage threshold.

Through the above control process, the Burst mode operation in which the bus voltage is intermittently operated within the threshold range between the preset upper limit voltage threshold and the preset lower limit voltage threshold is realized.

Further, a critical value that is as close as possible to the preset voltage upper limit threshold or close to the preset voltage lower limit threshold can be used to control the state switching of the high-frequency action signal to obtain the maximum bus voltage variation range, that is, V _{dc_max} -V _{dc_min} , In this way, the efficiency improvement result of burst mode is maximized, and the most efficient PFC function is realized.

Figure 22 and Figure 23 show the control signals output to the four switch tubes in the BURST control mode.

22 and FIG. 23, U _S AC power signal, I _S corresponding supply current.

As shown in FIG. 22, in this embodiment, in the drive control circuit provided with the totem pole type power factor correction module, by outputting different high-frequency action signals to the first switching tube and the second switching tube, and to The third switch tube and the fourth switch tube alternately output high level and low level, which realizes the output of the high-frequency control action signal in the totem pole type PFC module, so that the switch tube (specifically including the first switch tube and the second switch tube) The second switch tube) when outputting high-frequency control action signals, the bus voltage is boosted, and when the output of high-frequency action signals is stopped, the bus voltage is reduced, and then the intermittent output control strategy is set up with a totem pole PFC module The application of the drive control circuit.

As shown in FIG. 24, after controlling the half-wave length of the four switching tubes to output multiple AC control signals, the output of the control signals to the four switching tubes is turned off. At this time, the output current is zero.

When the output of the control signal to the switch tube is stopped, as shown in Figure 19, there is a circuit break between the power supply terminal and the load terminal, the power supply voltage signal U _{s is} still in the output state, and the power supply current signal I _s stops outputting.

As shown in Figure 11, optionally, if it is detected that the operating parameter is less than the second parameter threshold, not outputting an action signal to the multiple switch tubes according to the third control mode, which specifically includes:

Step 1102, inputting a reverse high-frequency action signal to the first switching tube and the second switching tube respectively to control the first switching tube and the second switching tube to alternate high-frequency switching;

Step 1104, if the AC power supply signal is in a positive half cycle, output a low level to the third switch tube and output a high level to the fourth switch tube;

Step 1106: If the AC power supply signal is in the negative half cycle, output a high level to the third switch tube and output a low level to the fourth switch tube, so that the third switch tube and the fourth switch tube are switched on and off alternately.

In any of the above embodiments, optionally, the preset upper limit voltage threshold is determined according to the bus capacitance and the withstand voltage parameters of the switch tube.

In any of the foregoing embodiments, optionally, the power supply signal is an AC power supply signal, and the preset lower voltage threshold is greater than the peak value of the AC power supply signal.

In this embodiment, due to the boost characteristics of the power factor correction module, the preset lower limit voltage threshold is set to be greater than the peak value of the AC power supply signal to ensure that the bus voltage is greater than or equal to the preset lower limit voltage threshold, and less than or equal to When the upper limit voltage threshold is preset, the reliability of the load power supply is guaranteed.

Embodiment 12

As shown in Figure 12, if the operating parameter is detected to be less than the preset operating parameter threshold, the multiple switch tubes are controlled to open and close according to the first control mode, including: if the operating parameter is detected to be less than the preset operating parameter threshold, the AC power supply signal Control the third switch tube to continuously turn off and control the fourth switch tube to continuously turn on within the positive half cycle of the AC power supply signal; and within the positive half cycle of the AC power supply signal, control the first switch tube and the second switch tube to alternately conduct conduction according to a predetermined number of times And disconnect operation. as well as

If it is detected that the operating parameter is greater than or equal to the preset operating parameter threshold, the bus voltage of the load is obtained; within the negative half cycle of the AC power supply signal, the first switching tube and the second switching tube are controlled to be turned on and off alternately according to the predetermined number of times operating.

Step 1202: It is detected that the operating parameter is less than a preset operating parameter threshold;

Step 1204, within the positive half cycle of the AC power supply signal, control the third switch tube to continuously turn off, and control the fourth switch tube to continuously turn on;

Step 1206, and the first time period has elapsed since the starting zero crossing of the positive half cycle;

Step 1208, controlling the first switching tube and the second switching tube to alternately conduct multiple times;

Step 1210, controlling the first switching tube to be turned on for a second time period and the second switching tube to be turned off for a second time period;

Step 1212: Control the first switching tube and the second switching tube to turn off for a third period of time respectively to complete the positive half cycle.

Step 1214, within the negative half cycle of the AC power supply signal, control the third switch tube to continuously turn on, and control the fourth switch tube to continuously turn off;

Step 1216, and the first time period has elapsed since the starting zero-crossing point of the self-defeating half cycle;

Step 1218, controlling the first switching tube and the second switching tube to alternately conduct multiple times;

Step 1220, controlling the second switching tube to turn on for a second time period and the first switching tube to turn off for a second time period;

Step 1222: Control the first switching tube and the second switching tube to turn off for a third period of time respectively to complete the negative half cycle.

Figure 24 shows the control signals output to the four switch tubes in the multi-pulse control mode.

Shown in Figure 24, U _S AC power signal, I _S corresponding supply current, in this embodiment, for the multi-pulse control mode, during the positive half cycle of the AC power supply signal, the control switch of the four major Including, for the first switching tube Q1 and the second switching tube Q2, controlling the first switching tube Q1 and the second switching tube Q2 to alternately open and close within a specified period of the positive half cycle, and for the third switching tube Q3 and the fourth switching tube The tube Q4 controls one of them to be continuously closed, and the other is continuously turned on, so as to realize the multi-pulse control of the switching tubes in the positive half cycle of the AC power supply signal.

In this embodiment, for the multi-pulse control mode, in the negative half cycle of the AC power supply signal, the control of the four switching tubes mainly includes, for the first switching tube Q1 and the second switching tube Q2, in the negative half cycle Within a specified period of time, control the first switching tube Q1 and the second switching tube Q2 to switch on and off alternately. For the third switching tube Q3 and the fourth switching tube Q4, control one of them to be continuously turned off and the other to be continuously turned on to achieve the The multi-pulse control of the switching tube in the positive half cycle of the power supply signal, combined with the above-mentioned multi-pulse control of the positive half cycle, realizes the switching control of the switching tube in the totem-pole power factor correction module in the multi-pulse control mode, Through the adaptation between the multi-pulse control mode and the low-power load, the optimization of the power supply control mode for the low-power load is realized, and the purpose of improving energy efficiency is achieved.

As shown in Figure 24, when the high-frequency action signal (ie PWM signal) is in the stop output state* (that is, the first switch tube Q1 and the second switch tube Q2 are in the stop output state), as shown in Figure 7, the power supply terminal and There is a circuit break between the load ends, the power supply voltage signal U _{s is} still in the output state, and the power supply current signal I _s stops output.

Embodiment 13

As shown in FIG. 13, the operation control method according to an embodiment of the present disclosure is applicable to a drive control circuit. The drive control circuit includes a power factor correction module, and the power factor correction module includes a switch tube to output pulse width modulation to the switch tube. Signal control The power supply signal supplies power to the load. The operation control methods include:

Step 1302, the action signal is in the output state, and the rising rate of the bus voltage in the drive control circuit is determined according to the operating power consumption of the load;

Step 1304: Detect whether the relationship between the ascent rate and the rate threshold meets a given condition;

Step 1306, the relationship does not meet the given condition, control and adjust the given current of the power factor correction module until the relationship meets the given condition, where the given current is the target output current of the power factor correction module, and the rise rate of the bus voltage is proportional to the given condition. There is a positive correlation between constant currents.

In the operation control method suitable for the drive control circuit proposed in the present disclosure, during the operation of the load driven by the drive control circuit, the operating power consumption of the load is detected to determine the bus based on the operating power consumption and the input power of the power supply signal The rate of voltage rise, and further detect the relationship between the rate of rise and the rate threshold to determine whether the relationship meets the given conditions. If the given conditions are not met, it indicates that the current given current does not meet the power supply requirements of the load , And then adjust the given current so that the relationship between the rise rate of the bus voltage and the rate threshold meets the given conditions, so as to achieve the adaptability of the load control power supply, so that by entering the mode of intermittent signal output to the switch tube, it can The power consumption of the switch tube in the drive control circuit is reduced, and the energy efficiency of electrical equipment (such as air conditioners) using the drive control circuit is improved.

Among them, the rate threshold is used to measure the rationality of the current bus voltage rising rate.

The action signal may specifically be a pulse width modulation signal (PWM) signal.

In the foregoing embodiment, optionally, the rate threshold includes an upper limit rate threshold, and detecting whether the relationship between the ascent rate and the rate threshold meets a given condition specifically includes: detecting the relationship between the ascent rate and the upper limit rate threshold; If the rate is greater than the upper limit rate threshold, it is determined that the relationship does not meet the given condition.

In this embodiment, when it is detected that the rate of rise is greater than the upper limit rate threshold, it indicates that the rate of rise of the current bus voltage is not within a reasonable range because it is too fast, resulting in increased switching loss and reduced operating efficiency, while the rate of rise is too high. Fast but not within a reasonable range indicates that the current given current is unreasonable, so the given current needs to be adjusted to meet the purpose of improving the reliability of load operation.

In the foregoing embodiment, optionally, the rate threshold further includes a lower rate threshold, the upper rate threshold is greater than the lower rate threshold, and detecting whether the relationship between the rising rate and the rate threshold satisfies a given condition, and specifically including: detecting the rising rate and The relationship between the lower rate threshold; if the ascent rate is less than the lower rate threshold, it is determined that the relationship does not meet the given condition; if the ascent rate is greater than or equal to the lower rate threshold, and less than or equal to the upper rate threshold, the relationship is determined to meet the given condition .

In this embodiment, when it is detected that the rate of rise is less than the lower limit rate threshold, it indicates that the rate of rise of the current bus voltage is too slow and not within a reasonable range, resulting in the failure to meet the operating requirements of the drive load, and the rate of rise is too slow. If it is not within a reasonable range, it indicates that the current given current is unreasonable, so the given current needs to be adjusted to meet the purpose of improving the energy efficiency of load operation.

In the above embodiment, optionally, if the relationship does not meet the given condition, control and adjust the given current of the power factor correction module until the relationship meets the given condition, including: if the rising rate is less than the lower limit rate threshold, the control is increased Given current; after the control increases the given current, the operating power consumption of the load is retrieved to determine whether the rising rate rises to greater than or equal to the lower limit rate threshold according to the operating power consumption.

In this embodiment, if it is detected that the rate of rise is less than the lower limit rate threshold, it indicates that the current given current is too small. Therefore, the given current is increased through control to increase the rate of rise of the bus voltage so that the rate of rise is adjusted to the lower limit rate. Between the threshold value and the upper limit rate threshold value, the rise rate of the bus voltage can meet the control requirement of the load power supply and achieve the purpose of reducing switching loss.

In the foregoing embodiment, optionally, controlling to increase the given current specifically includes: controlling to increase the given current according to the preset first current increase, and triggering the acquisition of the load after each increase of the given current Operating power consumption, until it is determined according to the operating power consumption that the relationship between the rising rate and the rate threshold meets the given condition.

In this embodiment, when it is detected that the given current is too small, the given current is gradually increased according to the specified first current increase and the corresponding adjustment frequency, and the operating power consumption is re-collected after each increase of the given current, To perform the above-mentioned detection of the relationship between the rising rate and the rate threshold, after the relationship satisfies a given condition, the adjustment operation is ended to ensure the efficient execution of the switching signal of the control switch tube.

In the above embodiment, optionally, if the relationship does not meet the given condition, control and adjust the given current of the power factor correction module until the relationship meets the given condition, specifically including: if the rising rate is greater than the upper limit rate threshold, the control is reduced Given current; detect whether the reduced given current is less than the current lower limit threshold; if the reduced given current is greater than or equal to the current lower limit threshold, and the ascent rate drops to less than or equal to the upper limit rate threshold, it will be reduced The given current of determines the actual given current; if the given current is less than the current lower threshold, the current lower threshold is determined as the actual given current.

In this embodiment, based on the bus voltage rising rate that satisfies the adjustment strategy in the interval between the lower limit rate threshold and the upper limit rate threshold, the adjustment operation of the given adjustment is performed, and during the adjustment process, the lower limit threshold of the current is set to prevent the given When the current is less than the current lower limit threshold, the normal power supply control of the load is affected, thereby ensuring the efficient and safe operation of the power factor correction module in the driving control current.

Among them, the current lower limit threshold is used to indicate the minimum value for normal power supply to the load.

In the above-mentioned embodiment, optionally, controlling to reduce the given current specifically includes: controlling to reduce the given current according to the preset second current drop amplitude, and triggering the collection load every time the given current is reduced. The operating power consumption until the relationship between the rising rate and the rate threshold is determined to meet the given conditions according to the operating power consumption.

In this embodiment, when it is detected that the given current is too large, the given current is gradually increased and decreased according to the specified second current drop and the corresponding adjustment frequency, and after each reduction of the given current, the operation is collected again. The power consumption is used to perform the above-mentioned detection of the relationship between the rising rate and the rate threshold. After the relationship satisfies the given condition, the adjustment operation is ended to ensure the efficient execution of the switching signal of the control switch tube.

In the above embodiment, optionally, it further includes: determining the lower current limit threshold according to the operating power consumption of the load and the power supply signal.

Embodiment Fourteen

FIG. 14 shows a schematic flowchart of an operation control method according to another embodiment of the present disclosure.

As shown in FIG. 14, the operation control method according to another embodiment of the present disclosure includes:

Step 1402: Calculate the operating power consumption of the load;

Step 1404: Calculate the rising rate of the bus voltage in the output state of the action signal;

Step 1406, the ascent rate is less than the lower limit rate threshold, if "yes", go to step 1408, if "no", go to step 1410;

Step 1408, control to increase the given current, and return to step 1402;

Step 1410, the ascent rate is greater than the upper limit rate threshold, if "Yes", go to step 1412;

Step 1412, control to reduce the given current;

Step 1414, detecting whether the reduced given current is less than or equal to the current lower limit threshold, if "yes", go to step 1416, if "no", return to step 1402;

Step 1416, the given current takes the current lower limit threshold.

Specifically, by detecting the operating parameters of the load, the rate of rise v of the bus voltage in the output state of the PWM (action signal) of the PFC (power factor correction module) is calculated. When v is less than the first threshold v1, the given current I of the PFC increases by △I1, and the operating parameters of the load are detected again, and the rate of rise of the bus voltage v when the PWM output of the PFC is turned on is calculated until v is greater than or equal to the lower limit rate Threshold v1; when v is greater than the upper limit rate threshold v2, the given current I of the PFC decreases by △I2, and the operating parameters of the load are detected again, and the rate of rise of the bus voltage v when the PWM output of the PFC is turned on is calculated until v is less than Or equal to the upper rate threshold v2.

Among them, the lower limit rate threshold v1 and the upper limit rate threshold v2 are respectively the minimum and maximum values of a reasonable range of the rate of rise of the bus voltage when the PWM of the PFC is in the output state. When the given current I of the PFC is less than or equal to its lower limit Imin, the given current I of the PFC takes its lower limit Imin.

Example 15

As shown in FIG. 15, according to an operation control device 150 of an embodiment of the present disclosure, the operation control device may specifically include a processor 1502 and a current sensor 1504. The current sensor 1504 collects the current of the load and uses the current as The operating power consumption is applied to the calculation of the rate of change of the bus voltage. When the processor 1502 executes the computer program, it can implement the operating control method as described in at least one of the above. Therefore, the operating control device has the benefits of the above at least one operating control method. The technical effect will not be repeated here.

Example 16

As shown in FIG. 16, the drive control circuit according to an embodiment of the present disclosure is used to supply the power supply signal input from the grid system to the load. The drive control circuit is connected to the at least one operation control device mentioned above, and the drive control circuit includes: The factor correction module (ie PFC module) includes a switch tube (not shown in the figure); the drive module is electrically connected to the power factor correction module, and is used to output a pulse width modulation signal to the switch tube so that the power factor correction module performs power Factor correction operation; such as the operation control device of the embodiment of the second aspect of the present application, which is electrically connected to the drive module and the load. The operation control device is used for: the AC power supply signal reaches any zero-crossing point, and the action signal is in the current state The duration of the medium meets the preset switching conditions, and the state switching operation is performed at the zero-crossing point. The state of the action signal includes the output state and the stop output state. The bus voltage is in an upward trend in the output state, and the switch tube stops in the stop output state. Switch action, the bus voltage is in a downward trend.

In the operation control circuit suitable for the drive control circuit proposed in the present disclosure, when the action signal is in the output state or in the stop output state, the duration of the current state and the state of the corresponding AC power supply signal are collected respectively. At the same time, if the duration of the corresponding current state meets the preset switching condition, the switching operation of the action signal is performed at the zero crossing point, so that after the action signal is in the output state for a period of time, the AC power supply signal The zero-crossing point is switched to the stop output state and maintained for a period of time to complete one operating cycle of the intermittent oscillation mode. On the one hand, by realizing the output of the action signal in the intermittent oscillation mode, the conduction of the PFC switch module in the drive control circuit can be reduced. Power consumption to improve the energy efficiency of electrical equipment (such as air conditioners) using the drive control circuit. On the other hand, it can realize the regular switching of the action signal in the intermittent oscillation mode. On the other hand, the output state is executed at the zero-crossing point. The switching operation can improve the stability of the switching operation. When the output of the action signal is stopped, the energy of the energy storage inductor on the output flow path can be effectively released to prevent impact on the switch tube.

In the above embodiment, optionally, the drive control circuit further includes: a bus capacitor C, which is arranged at the output end of the power factor correction module.

As shown in the figure, the power factor correction module includes: an energy storage inductor L, which is connected in series between the power supply and the bus capacitor. The power supply is used to generate an AC power supply signal. If the pulse width modulation signal is in the output state, the AC power supply signal is used to store energy The inductor, the bus capacitor C and the load are powered, or the energy storage inductor is charged through an AC power supply signal, and the load is powered through the bus capacitor C. If the pulse width modulation signal is in a stopped output state, the load is powered by the bus capacitor C.

In this embodiment, the active PFC circuit is provided with an energy storage inductor L and a bus capacitor C, and the bus voltage is the voltage across the bus capacitor C.

When the PWM signal is in the output state, it can be further divided into two working modes: one mode is shown in Figure 17, and the energy storage inductor L, the bus capacitor C and the load are powered by the power supply signal, that is, the energy storage inductor L is in discharge The other mode is shown in Figure 18. The energy storage inductor L is charged through the power supply signal, and the load is powered through the bus capacitor C, that is, the inductor charging mode. The switching of the two working modes is through the switch in the PFC switch module. The high-frequency switching action of the tube is realized. When the PWM signal is in the output state, the overall bus voltage is in an upward trend. When the PWM signal is in the stop output state, as shown in Figure 19, the power supply signal and the load are equivalent to In the cut-off state, power is supplied to the load through the bus capacitor C. Because the bus capacitor C is discharged, the bus voltage is in a downward trend.

Example Seventeen

As shown in FIG. 16, the drive control circuit according to an embodiment of the present disclosure is used to supply the power supply signal input by the grid system to the load. The drive control circuit is connected to any one of the above-mentioned operation control devices, and the drive control circuit includes: The power factor correction module, namely the PFC module, includes a switch tube (not shown in the figure); the drive module is electrically connected to the power factor correction module, and is used to output a pulse width modulation signal to the switch tube so that the power factor correction module performs power Factor correction operation; such as the operation control device of the above embodiment (ie 150 in Figure 15), which are electrically connected to the drive module and the load, respectively, and the operation control device is used to collect the operating power consumption of the load according to a preset detection period ; Determine the rate of change of the bus voltage in the drive control circuit in the current detection cycle according to the operating power consumption; determine the state switching time point of the pulse width modulation signal according to the rate of change and the length of the detection cycle, and the pulse width modulation signal The state includes output state and stop output state. If the pulse width modulation signal enters the stop output state, the switch tube stops switching action.

The driving control circuit proposed in this disclosure includes the above-mentioned operation control device, a driving module and a power factor correction module. The operation control device may specifically be a processor, and the processor controls the driving module to output pulses to the switch tube in the power factor correction module. Width modulation signal, in the process of driving the load by the drive control circuit, collect the operating power consumption of the load based on the detection cycle to detect the power consumption of the load, and determine whether the load is a high-power load or a low-power load based on the power consumption For the load, the corresponding bus voltage change rate can be calculated by running power consumption, and the change rate of the bus voltage in the next detection cycle can be predicted by the change rate, so that the power consumption of the load (including high power Load or low-power load) to determine the control strategy of the pulse width modulation signal based on the type of power consumption, that is, when the pulse width modulation signal (ie PWM signal) is in the output mode, determine whether to stop the output, and when the PWM signal is in When the output state is stopped, determine whether to start the signal output to achieve burst (intermittent oscillation) mode control based on the detection period and load power consumption. By entering the burst mode, the power consumption of the PFC switch module in the drive control circuit is reduced. In order to improve the energy efficiency of electrical equipment such as air conditioners using the drive control circuit.

Specifically, the bus voltage can be regarded as the power supply voltage to the load. The power supply signal can be the AC power supply signal AC of the mains or the DC power supply signal rectified by the rectifier. The preset detection period is used to determine the power supply voltage based on the detection period. Collect the operating power consumption of the load and calculate the rate of change of the bus voltage of the bus capacitor, so that after the current detection cycle is completed, through the estimation of the voltage change of the next detection cycle, determine whether to switch the output state of the PWM signal And after determining the switching output state, determine the corresponding switching time point, that is, if switching, the switching time point of the output state after the current detection period is completed, to complete the switching operation, through the PWM at the corresponding switching time point The switching of the signal output state realizes the control execution of the intermittent oscillation mode.

As shown in the figure, the power factor correction module includes: the energy storage inductor L, which is connected in series between the power supply and the bus capacitor. The power supply is used to generate the power supply signal. Among them, if the pulse width modulation signal is in the output state, the energy storage inductor, The bus capacitor C and the load supply power, or the energy storage inductor is charged through the power supply signal, and the load is supplied through the bus capacitor C. If the pulse width modulation signal is in the stop output state, the load is supplied through the bus capacitor C.

When the PWM signal is in the output state, it can be further divided into two working modes: one mode is shown in Figure 17, and the energy storage inductor L, the bus capacitor C and the load are powered by the power supply signal, that is, the energy storage inductor L is in discharge The other mode is shown in Figure 18. The energy storage inductor L is charged through the power supply signal, and the load is powered through the bus capacitor C, that is, the inductor charging mode. The switching of the two working modes is through the switch in the PFC switch module. The switching action of the tube is realized. When the PWM signal is in the output state, the overall bus voltage is in an upward trend. When the PWM signal is in the stop output state, as shown in Figure 19, the power supply signal and the load are in a cut-off state. , The load is powered through the bus capacitor C. Because the bus capacitor C is discharged, the bus voltage is in a downward trend.

Embodiment 18

As shown in FIG. 16, the drive control circuit according to an embodiment of the present disclosure is used to control the AC power supply signal to supply power to the load, and includes: a power factor correction module, including a switch tube; a drive module, and a power factor correction module. Connection, used to output high-frequency action signals to the switch tube, so that the power factor correction module performs power factor correction operations; the operation control device (including the control module and the bus voltage detection module) of any of the above embodiments, respectively, and the drive module And the load is electrically connected, the operation control device is used to: obtain the operation parameter of the load, the operation parameter corresponds to the size of the load; detect that the operation parameter is less than the first parameter threshold, and control the switching tube to open and close according to the first control mode; The operating parameter is greater than or equal to the first parameter threshold, and the switching tube is controlled to open and close according to the second control mode. The first control mode is the uncontrolled rectification mode. In the uncontrolled rectification mode, no action signals are input to multiple switching tubes. The second control mode is an intermittent oscillation control mode.

As shown in FIG. 20, in the above embodiment, optionally, the power supply signal is an AC power supply signal, the power factor correction module is an H-shaped rectifier module, and the switching tube includes a first switching tube Q1 and a second switching tube Q2 connected in series, And the third switch tube Q3 and the fourth switch tube Q4 connected in series, the common connection point after the third switch tube Q3 and the fourth switch tube Q4 are connected in series with the L line of the AC power supply signal, the first switch tube Q1 and the second switch The common connection point after the series connection of the tubes Q2 is connected to the N line of the AC power supply signal, the drain of the first switching tube Q1 is connected in series with the drain of the third switching tube Q3, and the common connection point is determined as the first end of the bus voltage, The source of the second switching tube Q2 is connected in series with the source of the fourth switching tube Q4, and the common connection point is determined as the second terminal of the bus voltage, and a bus capacitor is connected between the first terminal and the second terminal.

In this embodiment, in the drive control circuit provided with the H-shaped rectifier module, different high-frequency action signals are output to the first switching tube Q1 and the second switching tube Q2, and to the third switching tube Q3 and the second switching tube Q2. The four-switch tube Q4 alternately outputs high and low levels, realizing the output of the high-frequency control action signal in the totem-pole PFC module, so that the switching tube (specifically including the first switching tube Q1 and the second switching tube Q2) ) When outputting high-frequency control action signals, the bus voltage is boosted, and when the output of high-frequency action signals is stopped, the bus voltage is reduced, and then the intermittent oscillation control strategy is set to drive control of the totem-pole PFC module. Application in the circuit.

Example Nineteen

As shown in FIG. 16, the drive control circuit according to an embodiment of the present disclosure is used to supply the power supply signal input by the grid system to the load. The drive control circuit is connected to any one of the above-mentioned operation control devices, and the drive control circuit includes: The power factor correction module, namely the PFC module, includes a switch tube (not shown in the figure); the drive module is electrically connected to the power factor correction module, and is used to output a pulse width modulation signal to the switch tube so that the power factor correction module performs power Factor correction operation; the operation control device (ie, the operation control device 150 in FIG. 15) of the above-mentioned embodiment is electrically connected to the drive module and the load. The operation control device is used for: the action signal is in the output state, according to the load Operating power consumption determines the rate of rise of the bus voltage in the drive control circuit; detects whether the relationship between the rate of rise and the rate threshold meets the given condition; the relationship does not meet the given condition, controls and adjusts the given current of the power factor correction module until The relationship satisfies the given conditions, where the given current is the target output current of the power factor correction module, and the rising rate of the bus voltage is positively correlated with the given current.

The driving control circuit proposed in this disclosure includes the above-mentioned operation control device, a driving module and a power factor correction module. The operation control device may specifically be a processor, and the processor controls the driving module to output pulses to the switch tube in the power factor correction module. Width modulation signal, in the process of driving the load by the drive control circuit, and in the process of driving the load by the drive control circuit, by detecting the operating power consumption of the load, to determine the bus based on the operating power consumption and the input power of the power supply signal The rate of voltage rise, and further detect the relationship between the rate of rise and the rate threshold to determine whether the relationship meets the given conditions. If the given conditions are not met, it indicates that the current given current does not meet the power supply requirements of the load , And then adjust the given current so that the relationship between the rise rate of the bus voltage and the rate threshold meets the given conditions, so as to achieve the adaptability of the load control power supply, so that by entering the mode of intermittent signal output to the switch tube, it can The power consumption of the switch tube in the drive control circuit is reduced, and the energy efficiency of electrical equipment (such as air conditioners) using the drive control circuit is improved.

Example 20

A household electrical appliance according to an embodiment of the present disclosure includes: a load; the drive control circuit as described in any of the above embodiments, the drive control circuit is connected between the grid system and the load, and the drive control circuit is configured To control the grid system to supply power to the load.

In this embodiment, the home appliance includes the drive control circuit as described in any of the above embodiments. Therefore, the home appliance includes all the beneficial effects of the drive control circuit as described in any of the above embodiments. Repeat.

In an embodiment of the present disclosure, optionally, the household electrical appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner, and a host computer.

Example 21

A computer-readable storage medium according to an embodiment of the present disclosure has a computer program stored thereon, and when the computer program is executed, the steps of the operation control method as described in at least one of the above are realized.

In this embodiment, the computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it implements the operation control method as in any of the above-mentioned embodiments. Therefore, the computer-readable storage medium includes any of the above-mentioned embodiments. All the beneficial effects of the operation control method in, will not be repeated.

Those skilled in the art should understand that the embodiments of the present disclosure can be provided as methods, systems, or computer program products. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

The present disclosure is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

It should be noted that in the claims, any reference signs located between parentheses should not be constructed as limitations on the claims. The word "comprising" does not exclude the presence of parts or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of multiple such components. The present disclosure can be realized by means of hardware including several different components and by means of a suitably programmed computer. In the unit claims enumerating several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third does not indicate any order. These words can be interpreted as names.

Although the preferred embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

An operation control method, suitable for a drive control circuit, the drive control circuit includes a power factor correction module, the power factor correction module includes a switch tube to control an AC power supply signal to supply power to a load by outputting an action signal to the switch tube , Wherein the operation control method includes:

The AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the current state satisfies a preset switching condition, and the state switching operation is performed at the zero-crossing point, or

Determine the rate of change of the bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load, so as to determine the switching time point of the action signal state according to the rate of change,

Wherein, the state of the action signal includes an output state and a stop output state, the bus voltage is in an upward trend in the output state, in the stop output state, the switch tube stops switching action, and the bus voltage is in Downtrend.
The operation control method according to claim 1, wherein the AC power supply signal reaches any zero-crossing point, and the duration of the action signal in the current state satisfies a preset switching condition, and the state switching is performed at the zero-crossing point Operations, including:

If the action signal is in the output state, record the first duration of the output state;

If the AC power supply signal reaches an arbitrary zero-crossing point, and the first duration meets a first preset switching condition, the output of the action signal is stopped at the current zero-crossing point;

If the action signal is in the stop output state, record the second duration of the stop output state;

When the AC power supply signal reaches any zero-crossing point, and the second time length satisfies a second preset switching condition, the action signal is turned on and output at the current zero-crossing point.
The operation control method according to claim 2, wherein the AC power supply signal reaches any zero-crossing point, and the first time length satisfies a first preset switching condition, then stopping the output of the action signal at the current zero-crossing point specifically includes :

If the collected AC power supply signal reaches the zero-crossing point, calculate the sum of the first duration and the AC half-wave duration to be experienced, and determine it as the sum of the first duration;

Judging whether the sum of the first duration is greater than the first maximum duration;

If it is determined that the sum of the first duration is greater than the first maximum duration, control stops outputting the action signal.
The operation control method according to claim 3, wherein if the collected AC power supply signal reaches a zero-crossing point, it is collected whether the sum of the first duration and the first duration of the AC half-wave duration to be experienced is greater than the The first maximum duration, specifically including:

If it is collected that the AC power supply signal reaches the zero-crossing point, then count the number of half waves experienced by the AC power supply signal in the output state;

If the number of collected half-waves is an even number, whether the sum of the first duration is greater than the first maximum duration is collected.
The operation control method according to claim 3, further comprising:

Determining the rate of increase of the bus voltage in the drive control circuit in the output state according to the input power of the AC power supply signal and the operating power consumption of the load;

The first maximum duration is determined according to the ascent rate.
The operation control method according to claim 5, further comprising:

Collecting whether the rising rate is less than a first rate threshold;

If the rising rate is less than the first rate threshold, the duty cycle of the action signal is adjusted to increase in the next half-wave period of the AC power supply signal, so that the rising rate is increased to greater than or Equal to the first rate threshold.
The operation control method according to claim 6, further comprising:

After increasing the duty cycle in the next half-wave period of the AC power supply signal, collect the adjusted operating power consumption of the load in the next half-wave period to update the The first maximum duration.
The operation control method according to claim 6, further comprising:

If the rising rate is greater than or equal to the first rate threshold, collecting whether the rising rate is greater than a second rate threshold;

If the rising rate is greater than the second rate threshold, adjusting the duty cycle of the action signal to decrease in the next half-wave period of the AC power supply signal;

Collecting whether the adjusted duty cycle is less than the lower threshold of the duty cycle;

If the duty cycle is less than the lower threshold of the duty cycle, the lower threshold of the duty cycle is determined as the actual duty cycle of the action signal,

Wherein, the second rate threshold is greater than the first rate threshold.
The operation control method according to claim 8, further comprising:

After controlling to reduce the duty cycle, collect the adjusted operating power consumption of the load to update the first maximum duration according to the adjusted operating power consumption.
The operation control method according to at least one of claims 3 to 9, wherein the AC power supply signal reaches any zero-crossing point, and the second time period satisfies a second preset switching condition, the output of the action signal is turned on at the current zero-crossing point , Specifically including:

If the collected AC power supply signal reaches the zero-crossing point, calculate the sum of the second duration and the AC half-wave duration to be experienced, and determine it as the sum of the second duration;

Determine whether the sum of the second duration is greater than the second maximum duration;

If it is determined that the sum of the second duration is greater than the second maximum duration, it is determined that the second maximum duration satisfies the second preset switching condition, and the action signal is controlled to turn on and output.
The operation control method according to claim 10, further comprising:

Determining the rate of decrease of the bus voltage in the drive control circuit in the output stop state according to the operating power consumption of the load;

The second maximum duration is determined according to the falling rate.
The operation control method according to claim 1, wherein the change rate of the bus voltage in the drive control circuit is determined based on the output power of the AC power supply signal and the operating power consumption of the load, so as to be based on the The rate of change determines the switching time point of the action signal state, which specifically includes:

Collecting the operating power consumption according to a preset collection period;

Determining the rate of change of the bus voltage in the current collection period according to the operating power consumption;

The switching time point of the state of the action signal is determined according to the change rate and a preset voltage limit threshold.
The operation control method according to claim 12, wherein the rate of change includes a rate of increase and a rate of decrease, and the determining the rate of change of the bus voltage in the current collection period according to the operating power consumption specifically includes:

If the action signal is in the output state, the rate of increase of the bus voltage is determined according to the input power of the AC power supply signal and the operating power consumption.
The operation control method according to claim 13, wherein the determining the switching time point of the action signal state according to the change rate and a preset voltage limit threshold value specifically includes:

From the moment when the output of the action signal is turned on, determine the voltage rise amount in each collection period according to the rise rate;

After at least one of the collection periods has elapsed, determine the cumulative increase in voltage of the bus voltage in the current output state according to the increase in voltage;

If the cumulative increase in voltage is greater than or equal to the preset voltage limit threshold, control to stop outputting the action signal;

If the cumulative increase in voltage is less than the preset voltage limit threshold, continue to output the action signal.
The operation control method according to claim 14, wherein the determining the switching time point of the action signal state according to the change rate and a preset voltage limit threshold value specifically further comprises:

If the cumulative voltage increase is less than the preset voltage limit threshold, predict the estimated voltage increase in the next collection period according to the first predicted gain coefficient;

If the sum of the cumulative increase in voltage and the estimated increase in voltage is greater than or equal to the preset voltage limit threshold, control to stop outputting the action signal.
The operation control method according to claim 15, wherein:

The first prediction gain coefficient is greater than or equal to 1, and less than or equal to 2.
The operation control method according to claim 15, further comprising:

If the sum of the cumulative rise in voltage and the estimated rise in voltage is less than the preset voltage limit threshold, continue to collect the input power and operating power consumption in the next collection period, and according to the input power and the total The operating power consumption updates the value of the real-time bus voltage.
The operation control method according to claim 13, wherein determining the rate of change of the bus voltage in the current collection period according to the operation power consumption specifically further comprises:

If the action signal is in the output stop state, the rate of decrease of the bus voltage in the current collection period is determined according to the operating power consumption.
The operation control method according to claim 18, wherein the determining the switching time point of the action signal state according to the rate of change and a preset voltage limit threshold value specifically further comprises:

From the moment when the output of the action signal is turned off, the voltage drop amount of each collection period is determined according to the drop rate and the corresponding collection period, so that after at least one of the collection periods has elapsed, according to the The voltage drop determines the total voltage drop of the bus voltage in the current stop output state;

If the accumulated voltage drop is greater than or equal to the preset voltage limit threshold, control to turn on the output of the action signal.
The operation control method according to claim 19, wherein the determining the switching time point of the action signal state according to the change rate and a preset voltage limit threshold value specifically further comprises:

If the cumulative voltage drop is less than the preset voltage limit threshold, predict the estimated voltage drop in the next collection period according to the second predicted gain coefficient;

If the sum of the accumulated voltage drop and the estimated voltage drop is greater than or equal to the preset voltage limit threshold, control to turn on the output of the action signal.
The operation control method according to claim 20, wherein:

The second prediction gain coefficient is greater than or equal to 1, and less than or equal to 2.
The operation control method according to claim 20, further comprising:

If the sum of the cumulative voltage drop and the estimated voltage drop is less than the preset voltage limit threshold, continue to collect the operating power consumption in the next collection period, and update the real-time power consumption according to the operating power consumption The value of the bus voltage.
The operation control method according to at least one of claims 12 to 22, wherein the load is a compressor, and the collecting operation power consumption of the load according to a preset collection period specifically includes:

Collecting the line voltage and line current of the compressor according to the collection period;

The operating power consumption in each collection period is determined according to the line voltage and the line current.
The operation control method according to at least one of claims 12 to 22, wherein:

The collection period is an integer multiple of the half-wave period of the AC power supply signal, so as to perform the switching operation at a zero-crossing point of the AC power supply signal.
The operation control method according to at least one of claims 1 to 24, wherein:

The switch tube includes an IGBT-type power tube and a MOSFET, and the MOSFET includes a SiC-MOSFET and a GaN-MOSFET.
An operation control device, wherein the operation control device is provided with a processor, wherein when the processor executes a computer program, the operation control method according to at least one of claims 1 to 25 can be realized.
A drive control circuit is used to control the power supply signal to supply power to the load, which includes:

Power factor correction module, including switch tube;

The drive module is electrically connected to the power factor correction module, and is used to output a high-frequency action signal to the switch tube, so that the power factor correction module performs power factor correction operations;

The operation control device according to claim 26, which is electrically connected to the drive module and the load.
The drive control circuit according to claim 27, further comprising:

The bus capacitor is arranged at the output end of the power factor correction module;

The power factor correction module includes an energy storage inductor connected in series between a power supply and the bus capacitor, and the power supply is used to send out the AC power supply signal,

Wherein, if the high-frequency action signal is in the output state, the energy storage inductor, the bus capacitor, and the load are powered by the AC power supply signal, or the energy storage inductor is charged by the AC power supply signal , Supplying power to the load through the bus capacitor, and supplying power to the load through the bus capacitor if the high-frequency action signal is in an output stop state.
A household electrical appliance, including:

load;

The drive control circuit according to claim 27 or 28, wherein the drive control circuit is connected between the power supply signal and the load, and the drive control circuit is configured to control the power supply signal to supply power to the load.
The household electrical appliance according to claim 29, wherein:

The home appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner, and a computer host.
A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, the steps of the operation control method according to at least one of claims 1 to 25 are realized.