CN111211678A

CN111211678A - Adjusting circuit, control method, device, control circuit, household appliance and medium

Info

Publication number: CN111211678A
Application number: CN202010188208.6A
Authority: CN
Inventors: 井上薰; 黄招彬; 赵鸣; 文先仕; 徐锦清; 张杰楠; 曾贤杰; 胡斌; 龙谭
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-05-29

Abstract

The invention provides a regulating circuit, a control method, a device, a control circuit, household electrical appliance equipment and a medium, wherein the regulating circuit comprises: the synchronous rectification module comprises a high-voltage output end and a low-voltage output end, and is suitable for synchronously configuring an input alternating current signal into a direct current signal; and the power factor correction module is electrically connected with the synchronous rectification module and comprises a first half-bridge component, a second half-bridge component and an inductive element arranged between the first half-bridge component and the second half-bridge component, the power factor correction module is suitable for configuring the direct current signal into bus voltage according to the switch control signal, the bus voltage boosts or lowers the direct current signal, and two ends of the second half-bridge component are configured as output ends of the bus voltage. The technical scheme that this application provided not only can realize the buck-boost function to can guarantee the steady change of power factor correction module PFC electric current when switching between the buck-boost, reduce harmonic distortion, and then be favorable to promoting PFC efficiency.

Description

Adjusting circuit, control method, device, control circuit, household appliance and medium

Technical Field

The present invention relates to the field of switch control circuits, and in particular, to a voltage regulator circuit, a control method of the voltage regulator circuit, a control apparatus of the voltage regulator circuit, a drive control circuit, a home appliance, and a computer-readable storage medium.

Background

For loads such as a permanent magnet motor, the higher the bus voltage output by the drive control circuit, the larger the iron loss of the motor, the lower the bus voltage, and the smaller the iron loss of the motor, so that the iron loss can be reduced by appropriately reducing the bus voltage.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide a voltage regulating circuit.

Another object of the present invention is to provide a control method, a control device and a storage medium for a voltage regulator circuit.

It is still another object of the present invention to provide a driving control circuit and a home appliance.

According to an aspect of the first aspect of the present invention, a voltage regulation circuit is provided, including: the synchronous rectification module comprises a high-voltage output end and a low-voltage output end, and is suitable for synchronously configuring an input alternating current signal into a direct current signal; the power factor correction module is electrically connected with the synchronous rectification module and comprises a first half-bridge component, a second half-bridge component and an inductive element arranged between the first half-bridge component and the second half-bridge component, wherein the first half-bridge component is arranged between a low-voltage output end and a high-voltage output end, the second half-bridge component comprises a plurality of power tubes connected in series, one of the power tubes is connected with the first half-bridge component, one end of the inductive element is connected to any one connection point between the power tubes, the other end of the inductive element is connected to a designated position of the first half-bridge component, the power factor correction module is suitable for configuring a direct current signal into a bus voltage according to a switch control signal, the bus voltage boosts or lowers the direct current signal, and two ends of the second half-bridge component are configured into an output end.

Wherein, the first half-bridge also comprises a plurality of power tubes in the same direction.

The synchronous rectification module comprises a first rectification half bridge and a second rectification half bridge which are connected in parallel, wherein two ends of the first rectification half bridge and the second rectification half bridge are configured into a low-voltage output end and a high-voltage output end; the first rectifying half bridge comprises a first power tube and a second power tube which are connected, the second rectifying half bridge comprises a third power tube and a fourth power tube which are connected, wherein in a positive half period of an alternating current signal, the first power tube and the fourth power tube are both configured to be in a conducting state, or one of the first power tube and the fourth power tube is configured to be in an off state, or all the first power tube and the fourth power tube are configured to be in an off state, the second power tube and the third power tube are configured to be in an off state, and in a negative half period of the alternating current signal, the first power tube and the fourth power tube are configured to be in an off state, and the second power tube and the third power tube are configured to be in an on state, or one of the first power.

Specifically, if a power MOSFET is used as a rectifying device, the gate voltage must be synchronized with the phase of the rectified voltage to complete the rectifying function, so it is called synchronous rectification.

The first power tube, the second power tube, the third power tube and the fourth power tube are all power switch tubes, or the middle parts of the first power tube, the second power tube, the third power tube and the fourth power tube are power switch tubes, and the parts are power diodes.

The power factor correction module further comprises: and the capacitive element is connected to two ends of the second half-bridge component.

In this technical scheme, voltage regulation circuit includes synchronous rectifier module and power factor correction module, synchronous rectifier module is for other forms's rectifier module, be favorable to reducing the rectification loss, and improve power efficiency, and power factor correction module realizes the relative DC signal's of the bus voltage signal of output step-up or step-down operation through carrying out the power factor correction operation to DC signal, construct power factor correction module through adopting two half-bridge subassemblies, two half-bridge subassemblies set up respectively in the both sides of perception component, control through different switch control signal realizes the function of stepping up, the function of stepping down, and the switching function between the step-up and step-down.

The two ends of the capacitive element are the output ends of the bus voltage.

Through reasonable setting of the switch control signal, the stable change of current can be ensured when a power factor correction module (PFC) is switched between the buck-boost, harmonic distortion is reduced, and the PFC efficiency is favorably improved.

Furthermore, through the regulation of the output bus voltage, when the voltage regulation circuit is adopted to control the power supply of a load, such as a permanent magnet motor, the operation efficiency of the permanent magnet motor is favorably improved.

Specifically, the first half-bridge assembly comprises a fifth power tube and a sixth power tube which are connected in series, and the first half-bridge assembly comprises a seventh power tube and an eighth power tube which are connected in series.

The fifth power tube and the eighth power tube are power switching tubes, the sixth power tube and the seventh power tube are power switching tubes or power diodes, each power switching tube comprises a first electrode and a second electrode, each second electrode is suitable for being connected with a substrate in the corresponding switching tube, and each power diode also comprises a first electrode and a second electrode.

The power switch tube may be a triode, an MOS Transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) or an IGBT (Insulated Gate bipolar Transistor), wherein if the power switch tube is a triode, the controlled electrode is a base electrode, the first electrode is a collector electrode, the second electrode is an emitter electrode, and if the power switch tube is an MOS Transistor, the controlled electrode is a Gate electrode, the first electrode is a drain electrode, and the second electrode is a source electrode.

The first electrode of the power diode is a cathode, and the second electrode of the power diode is an anode.

If necessary, three or more power tubes may be provided per half-bridge module.

In addition, the voltage regulating circuit in the above embodiment provided by the present invention may further have the following additional technical features:

in the above technical solution, a first electrode of a fifth power tube is connected to the high voltage output terminal, a second electrode of the fifth power tube is connected to a first electrode of a sixth power tube, and a second electrode of the sixth power tube is connected to the low voltage output terminal; the designated position is a connection point between the fifth power tube and the sixth power tube; the first electrode of the seventh power tube and the second electrode of the eighth power tube are configured as output ends of bus voltage, the second electrode of the seventh power tube is connected to the first electrode of the eighth power tube, and the first electrode of the eighth power tube is connected to the sixth power tube.

In the technical scheme, as a first setting mode of the power factor correction module, an eighth power tube is connected to a low-voltage output end, a seventh power tube is not directly connected with the low-voltage output end or the high-voltage output end, one end of a sensing element is connected between the seventh power tube and the eighth power tube, the other end of the sensing element is connected between a fifth power tube and a sixth power tube, the fifth power tube is connected to the high-voltage output end, and the sixth power tube is connected to the low-voltage output end.

And when one of the seventh power tube and the eighth power tube is turned off and the other one of the seventh power tube and the eighth power tube is turned on, the switching control signal controls the fifth power tube and the sixth power tube to be turned on and off by adjusting the duty ratio of the switching control signal, so that the boosting function is realized.

And four switching tubes are controlled by different switching control signals, so that transition stable transition is realized when switching between voltage boosting and voltage reducing.

In the above technical solution, a first electrode of a sixth power tube is connected to the high voltage output terminal, a second electrode of the sixth power tube is connected to a first electrode of a fifth power tube, and a second electrode of the fifth power tube is connected to the low voltage output terminal; the designated position is a connection point between the fifth power tube and the sixth power tube; the first electrode of the eighth power tube and the second electrode of the seventh power tube are configured as output ends of bus voltage, the second electrode of the eighth power tube is connected to the first electrode of the seventh power tube, and the first electrode of the eighth power tube is connected to the sixth power tube.

In this technical solution, as a second setting mode of the power factor correction module, the eighth power tube is connected to the high-voltage output end, one end of the inductive element is connected between the seventh power tube and the eighth power tube, the other end of the inductive element is connected between the fifth power tube and the sixth power tube, the fifth power tube is connected to the high-voltage output end, and the sixth power tube is connected to the low-voltage output end.

Specifically, relative to the first setting mode, the high-voltage output end is connected with the second half-bridge assembly, the fifth power tube and the sixth power tube are interchanged, and the seventh power tube and the eighth power tube are interchanged, so that the control method is ensured to be the same as the first setting mode.

In the above technical solution, a first electrode of a sixth power tube is connected to the high voltage output terminal, a second electrode of the sixth power tube is connected to a first electrode of a fifth power tube, and a second electrode of the fifth power tube is connected to the low voltage output terminal; the designated position is a first electrode of a sixth power tube; the first electrode of the seventh power tube and the second electrode of the eighth power tube are configured as output ends of bus voltage, the second electrode of the seventh power tube is connected to the first electrode of the eighth power tube, and the second electrode of the eighth power tube is connected between the fifth power tube and the sixth power tube.

In the technical scheme, as a third setting mode of the power factor correction module, compared with the first setting mode, the fifth power tube is moved to a position between the low-voltage output end and the fifth power tube from the original position, and a control mode which is the same as that of the first setting mode can be ensured.

In the above technical solution, a first electrode of a fifth power tube is connected to the high voltage output terminal, a second electrode of the fifth power tube is connected to a first electrode of a sixth power tube, and a second electrode of the sixth power tube is connected to the low voltage output terminal; the designated position is a second electrode of a sixth power tube; the second electrode of the seventh power tube and the first electrode of the eighth power tube are configured as output ends of bus voltage, the first electrode of the seventh power tube is connected to the second electrode of the eighth power tube, and the first electrode of the eighth power tube is further connected between the fifth power tube and the sixth power tube.

In the technical solution, as a fourth setting mode of the power factor correction module, compared with the third setting mode, the fifth power tube and the sixth power tube are moved from being connected in series between the low voltage output end and the inductive element to being connected between the high voltage output end and the inductive element, and the seventh power tube and the eighth power tube are exchanged in position to ensure the same control mode as the first setting mode.

In the above technical solution, the fifth power transistor and the eighth power transistor include a power switch transistor; the sixth power tube and the seventh power tube comprise power switch tubes or power diodes.

In the above technical solution, the power factor correction module further includes: the first controller is connected to the bases of the first power tube, the second power tube, the third power tube, the fourth power tube, the fifth power tube, the sixth power tube, the seventh power tube and the eighth power tube, and is used for sending a rectification driving signal to the first power tube, the second power tube, the third power tube and the fourth power tube and sending a switch control signal to the fifth power tube, the sixth power tube, the seventh power tube and the eighth power tube.

In the above technical solution, the method further comprises: the detection module is suitable for detecting at least one of an alternating current signal, a direct current signal, an inductive current of the inductive element and a bus voltage at two ends of the capacitive element, and is also electrically connected with the first controller.

According to a second aspect of the present invention, there is provided a control method for a voltage regulating circuit, the voltage regulating circuit includes a synchronous rectification module and a power factor correction module, the synchronous rectification module includes four power tubes, the four power tubes synchronously configure an input ac signal into a dc signal according to a rectification driving signal, the power factor correction module is adapted to configure an output bus voltage according to a received switching control signal, the control method includes: collecting an electric signal at a specified position in a voltage regulating circuit; and configuring the duty ratio of the switch control signal according to the reference voltage and the electric signal, wherein the duty ratio is suitable for regulating the bus voltage so as to enable the bus voltage to approach the reference voltage.

In the technical scheme, the reference voltage is used for representing the power supply voltage required by the load, the bus voltage output by the voltage regulating circuit can be determined based on the electric signal by detecting the electric signal at the specified position in the driving control circuit, so that the duty ratio of the switching control signal can be configured according to the relation between the bus voltage and the reference voltage, the switching of a power tube in the power factor correction module is controlled by the switching control signal with the duty ratio, the voltage boosting regulation or the voltage reduction regulation of the bus voltage is realized to approach the reference voltage, and the operating efficiency of the load on the inversion side (such as a permanent magnet motor in the inverter compressor) can be improved.

The switching control signal is specifically a PWM (pulse width modulation) signal.

In the above technical solution, the driving control circuit further includes a synchronous rectification module, the synchronous rectification module is adapted to configure an input ac signal into a dc signal synchronously, the power factor correction module is connected to an output end of the synchronous rectification module, the power factor correction module further includes an inductive element, and the power factor correction module collects an electrical signal at a specified position in the voltage regulating circuit, and specifically includes: at least one of an alternating current signal, a direct current signal, an inductive current of an inductive element, and a bus voltage is detected.

In the technical scheme, the duty ratio of the switch control signal input to the power factor correction module is reliably adjusted by collecting the electric signal and combining the set reference voltage.

In the above technical solution, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: the reference voltage is in a stable state, and the reference voltage is greater than or equal to a first voltage threshold value, and the control adjusts the duty ratio to enable the power factor correction module to operate according to a boosting mode and/or an intermediate mode so as to increase the bus voltage.

It will be appreciated by those skilled in the art that the different modes of operation cannot be performed simultaneously, but rather sequentially.

And recording the maximum direct current voltage obtained after rectification by the synchronous rectification module as a first voltage threshold.

In the technical scheme, if the reference voltage is a fixed value or a fixed range and is higher than or close to the rectified maximum direct current voltage, the power factor correction module is controlled to operate in a boost mode in one period of the alternating current power supply so as to realize a boost function.

The intermediate mode can realize both boosting and voltage reduction, and can link the switching between the boosting mode and the voltage reduction mode, so that the current during switching is changed stably, and the PFC efficiency is improved.

In the above technical solution, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: and if the reference voltage is in a stable state and the reference voltage is smaller than the first voltage threshold value, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a voltage reduction mode and/or an intermediate mode so as to reduce the bus voltage.

In the technical scheme, if the reference voltage is smaller than the first voltage threshold, the reference voltage is smaller, that is, the voltage actually required by the load is smaller, at this time, the power factor correction module is controlled to operate according to the voltage reduction mode, so that the value of the output bus voltage is reduced, and the load operation efficiency is improved.

In the above technical solution, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: if the reference voltage is in a stable state and the reference voltage is smaller than the first voltage threshold, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a boost mode, an intermediate mode and a buck mode so as to reduce the bus voltage; or controlling and adjusting the duty ratio to enable the power factor correction module to operate alternately according to the boosting mode and the intermediate mode so as to reduce the bus voltage.

In the technical scheme, if the reference voltage is low, the bus voltage needs to be correspondingly reduced, and the bus voltage can be reduced in a manner that the power factor correction module operates according to a boost mode, an intermediate mode and a buck mode, or a duty ratio is controlled and adjusted so that the power factor correction module alternately operates according to the boost mode and the intermediate mode.

In the above technical solution, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a boost mode, an intermediate mode, and a buck mode specifically includes: configuring a first switching threshold value and a second switching threshold value according to the performance parameters of the power factor correction module; entering a period of the alternating current signal from a designated phase, and controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a boosting mode if the voltage value of the direct current signal is smaller than a first switching threshold value; if the voltage value of the direct current signal rises to be larger than a first switching threshold value, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the intermediate mode; if the voltage value rises to be larger than or equal to the second switching threshold value, controlling and adjusting the duty ratio to operate according to the voltage reduction mode; if the voltage drops to be smaller than a second switching threshold value, controlling and adjusting the duty ratio to operate according to the intermediate mode; and if the voltage drops to be smaller than a first switching threshold value, controlling and adjusting the duty ratio to operate according to the boosting mode, wherein the first switching threshold value is smaller than a second switching threshold value.

In the technical scheme, if the reference voltage is small, the lower limit direct current voltage (namely, the second switching threshold) of the step-down mode and the upper limit direct current voltage (namely, the first switching threshold) of the step-up mode can be set according to the device performance, and the step-up mode, the intermediate mode and the step-down mode are alternately used in one period of the alternating current power supply, so that stable step-down is realized.

According to the technical scheme, the power factor correction module is controlled to operate according to the intermediate mode between the voltage boosting mode and the voltage reducing mode, only two power tubes are controlled to be switched to four power tubes, and then the other two power tubes are controlled, so that the current stability in the switching process can be improved.

In the above technical solution, if it is detected that the reference voltage is decreased from being greater than the first voltage threshold to being less than the first voltage threshold, the power factor correction module is configured to operate according to a buck mode and/or an intermediate mode.

In the technical scheme, when the voltage is higher than the first voltage threshold in the earlier stage but needs to be quickly adjusted down, the power factor correction module is controlled to be switched to a voltage reduction mode or an intermediate mode so as to reduce the charging time of the inductive element and the voltages at two ends during charging, and therefore the bus voltage can be quickly reduced.

In the above technical scheme, the power factor correction module includes a first half-bridge component and a second half-bridge component, the first half-bridge component is disposed between the low-voltage output end and the high-voltage output end of the synchronous rectification module, the second half-bridge component is connected to one of the low-voltage output end and the high-voltage output end, the first half-bridge component includes a fifth power tube and a sixth power tube which are connected in series, and the second half-bridge component includes a seventh power tube and an eighth power tube which are connected in series.

In the above technical solution, the power factor correction module operates according to a boost mode, and specifically includes: and controlling to switch on the fifth power tube and to switch off the sixth power tube.

In the above technical solution, the power factor correction module operates according to a boost mode, and further includes: and controlling the seventh power tube and the eighth power tube according to the first group of switch control signals with dead zones and complementary control, so that the eighth power tube is switched off when the seventh power tube is switched on, and the eighth power tube is switched on when the seventh power tube is switched off.

In addition, the power factor correction module operates according to a boost mode, further comprising: and only the eighth power tube is controlled to be opened and closed, and the seventh power tube is kept disconnected.

In the technical scheme, the boost circuit is constructed by controlling the fifth power tube to be turned on and the sixth power tube to be turned off, the seventh power tube and the eighth power tube are controlled according to the switch control signal to realize boost, and the specific boost amount is further adjusted by adjusting the duty ratio of the switch control signal.

In the above technical solution, the power factor correction module operates according to a buck mode, and specifically includes: and controlling to switch on the seventh power tube and controlling to switch off the eighth power tube.

In the above technical solution, the power factor correction module operates according to a buck mode, and further includes: and controlling the fifth power tube and the sixth power tube according to a second group of switch control signals with dead zones and complementary control, so that the sixth power tube is switched off when the fifth power tube is switched on, and the sixth power tube is switched on when the fifth power tube is switched off.

In addition, the power factor correction module operates according to a buck mode, further comprising: and only the fifth power tube is controlled to be opened and closed, and the sixth power tube is kept disconnected.

In the technical scheme, the seventh power tube is controlled to be turned on and the eighth power tube is controlled to be turned off so as to construct the voltage reduction circuit, the voltage reduction is realized by controlling the fifth power tube and the sixth power tube according to the switch control signal, and the specific voltage reduction amount is further adjusted by adjusting the duty ratio of the switch control signal.

In the above technical solution, the intermediate mode includes a first intermediate mode, and the power factor correction module operates according to the intermediate mode, and specifically includes: in the first intermediate mode, the fifth power tube and the eighth power tube are controlled to be opened and closed according to a third switch control signal, the sixth power tube and the seventh power tube are controlled to be opened and closed according to a fourth switch control signal, and the third switch control signal and the fourth switch control signal are complementary driving signals with dead zones.

In this technical solution, as a first implementation manner of the intermediate mode, the same third switch control signal is used to control the fifth power transistor and the eighth power transistor, so that the fifth power transistor and the eighth power transistor operate in the same manner, the same fourth switch control signal is used to control the sixth power transistor and the seventh power transistor, so that the sixth power transistor and the seventh power transistor operate in the same manner, and the third switch control signal and the fourth switch control signal are complementary signals, so as to implement reliable control of the intermediate mode.

In the above technical solution, the intermediate mode further includes a second intermediate mode, and the power factor correction module operates according to the intermediate mode, specifically including: in a second intermediate mode, collecting an inductive current of the inductive element; if the inductive current is larger than the reference current, controlling the power factor correction module to operate according to a voltage reduction mode; and if the inductive current is less than or equal to the reference current, controlling the power factor correction module to operate according to the boosting mode.

In the technical scheme, the step-up or step-down can be determined based on the change of the inductive current.

In the above technical solution, the intermediate mode further includes a third intermediate mode, and the power factor correction module operates according to the intermediate mode, specifically including: and if the reference voltage, the first switching threshold and the second switching threshold are the same, controlling the power factor correction module to operate according to the boosting mode and the step-down mode respectively in a third intermediate mode.

In the technical scheme, the first switching threshold is the same as the second switching threshold, so that transition between voltage increasing and decreasing is not required, and the third intermediate mode can be a voltage increasing mode and a voltage decreasing mode which are operated alternately.

In addition, for the boosting mode, the voltage reduction mode and the intermediate mode, one or two of the fifth power tube and the seventh power tube can be controlled to be turned off, and the current can flow through the power diodes which are connected in parallel in the reverse direction.

In the above technical solution, the bus voltage is suitable for supplying power to the load, and the control method further includes: and configuring the reference voltage according to the operating condition of the load.

In the above technical solution, the load includes a motor, and the reference voltage is configured according to an operation condition of the load, which specifically includes: and configuring reference voltage according to the operation parameters of the motor, the state parameters of the motor, the model parameters of the motor and the modulation ratio of the motor.

In the above technical solution, configuring the reference voltage according to the operation condition of the load specifically includes: the operation condition comprises a motor rotating speed, and if the motor rotating speed is less than or equal to a first rotating speed threshold value, the reference voltage is configured to be less than a second voltage threshold value; if the motor speed is greater than the first speed threshold and less than the second speed threshold, the reference voltage is configured to be greater than the second voltage threshold and less than the first voltage threshold; if the motor speed is greater than or equal to a second speed threshold, the reference voltage is configured to be greater than or equal to a first voltage threshold, wherein the second voltage threshold is less than the first voltage threshold.

In this technical solution, in an application scenario where the variable frequency driving of the permanent magnet synchronous motor is used as a load, preferably, in terms of energy efficiency, a reference voltage value of the buck-boost converter is given according to a rotation speed of the permanent magnet synchronous motor, a motor model, a modulation ratio, a motor state quantity, and the like, and then a working state of the buck-boost converter part is adjusted, so that the efficiency of the motor during low-frequency operation is improved:

1) when the rotating speed of the permanent magnet synchronous motor is smaller than or equal to the first rotating speed threshold value, the calculated bus voltage required by the motor is far smaller than the peak value of the rectified voltage, namely the second voltage threshold value, and the buck-boost converter part works in a buck mode.

2) When the rotating speed of the permanent magnet synchronous motor is greater than a first rotating speed threshold and smaller than a second rotating speed threshold, and when the calculated bus voltage required by the motor is smaller than the peak value of the rectified voltage, namely greater than the second voltage threshold and smaller than the first voltage threshold, the voltage reduction and conversion part alternately uses a voltage reduction mode, an intermediate mode and a voltage increase mode.

3) When the rotating speed of the permanent magnet synchronous motor is greater than the second rotating speed threshold value, when the calculated bus voltage required by the motor is close to or greater than the peak value of the rectified voltage, namely the first voltage threshold value, the buck-boost converter part works in a boost mode.

According to a third aspect of the present invention, there is provided a control device for a voltage regulator circuit, comprising: a memory and a processor; a memory for storing program code; a processor for executing the steps of the control method of the voltage regulating circuit as defined in any one of the claims of the second aspect of the present application.

According to an aspect of the fourth aspect of the present application, there is provided a drive control circuit including: the voltage regulating circuit defined in the above-mentioned first aspect, the control device of the voltage regulating circuit defined in the above-mentioned third aspect, the control device is configured to control the voltage regulating circuit to output the dc bus voltage according to the input ac signal.

In the above technical solution, the inverter is electrically connected to the voltage regulating circuit, and is configured to configure the dc bus voltage as an ac driving signal; the inverter includes: three switch tube subassemblies and second controller in parallel, the second controller is connected to the controlled end of each switch tube subassembly.

According to a technical solution of a fifth aspect of the present application, a home appliance is provided, including: a load; the driving control circuit defined in the second aspect of the present application is connected between the ac power source and the load; the drive control circuit is configured to control a power supply signal of the alternating current power supply to supply power to the load.

According to an aspect of the sixth aspect of the present application, a computer-readable storage medium is proposed, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the control method as defined in any one of the above-mentioned aspects of the second aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a circuit schematic of a voltage regulation circuit according to one embodiment of the present invention;

FIG. 2 shows a circuit schematic of a voltage regulation circuit according to another embodiment of the present invention;

FIG. 3 shows a circuit schematic of a voltage regulation circuit according to yet another embodiment of the present invention;

FIG. 4 shows a circuit schematic of a voltage regulation circuit according to yet another embodiment of the present invention;

FIG. 5 shows a circuit schematic of a voltage regulation circuit according to yet another embodiment of the present invention;

FIG. 6 shows a schematic flow diagram of a control method of a voltage regulation circuit according to yet another embodiment of the present invention;

FIG. 7 shows an equivalent circuit schematic of a voltage regulation circuit according to one embodiment of the present invention;

FIG. 8 shows an equivalent circuit schematic of a voltage regulation circuit according to another embodiment of the present invention;

FIG. 9 shows a schematic diagram of the switching control signals of the power transistor in the voltage regulation circuit according to one embodiment of the present invention;

FIG. 10 is a schematic diagram of the switching control signals of the power transistor in the voltage regulation circuit according to another embodiment of the present invention;

FIG. 11 shows a schematic block diagram of a control device of a voltage regulation circuit according to yet another embodiment of the present invention;

fig. 12 shows a circuit schematic of a drive control circuit according to an embodiment of the invention.

Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:

10 synchronous rectification module, 20 power factor correction module.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments of the voltage regulation circuit of the present invention are described below with reference to fig. 1-12.

As shown in fig. 1, a voltage regulating circuit according to an embodiment of the present invention includes: a voltage regulation circuit comprising: the synchronous rectification module 10 comprises a high-voltage output end and a low-voltage output end, and is suitable for synchronously configuring an input alternating current signal into a direct current signal; a power factor correction module 20 electrically connected to the synchronous rectification module 10, wherein the power factor correction module 20 includes a first half-bridge component and a second half-bridge component, the first half-bridge component is disposed between the low voltage output terminal DC-and the high voltage output terminal DC +, the second half-bridge component includes a plurality of power tubes connected in series, one of the plurality of power tubes is connected to the first half-bridge component, the power factor correction module 20 further includes an inductive element L and a capacitive element C, the inductive element L is disposed between the first half-bridge component and the second half-bridge component, one end of the inductive element L is connected to any connection point between the plurality of power tubes, the other end of the inductive element L is connected to a designated position of the first half-bridge component, the capacitive element C is connected to both ends of the second half-bridge component, both ends of the second half-bridge component are adapted to output a bus voltage, the power factor correction module 20 is adapted to configure a DC signal into a, the bus voltage is boosted or reduced relative to the DC signal.

In addition, the first half bridge also comprises a plurality of power tubes in the same direction.

The synchronous rectification module comprises a first rectification half bridge and a second rectification half bridge which are connected in parallel, wherein two ends of the first rectification half bridge and the second rectification half bridge are configured into a low-voltage output end and a high-voltage output end; the first rectification half bridge comprises a first power tube Q1 and a second power tube Q2 which are connected, the second rectification half bridge comprises a third power tube Q3 and a fourth power tube Q4 which are connected, wherein in the positive half period of the alternating current signal, the first power tube Q1 and the fourth power tube Q4 are configured to be in a conducting state, or one of the first power tube Q3 and the fourth power tube Q4 is configured to be in an off state, or all of the first power tube Q2 and the third power tube Q3 are configured to be in an off state, in the negative half period of the alternating current signal, the first power tube Q1 and the fourth power tube Q4 are configured to be in an off state, and the second power tube Q2 and the third power tube Q3 are configured to be in a conducting state, or one of the second power tube Q2 and the third power tube Q3.

The power factor correction module further comprises: and the capacitive element C is connected to two ends of the second half-bridge assembly.

Wherein, the two ends of the capacitive element C are the output ends of the bus voltage.

By reasonably setting the switch control signal, the stable change of the current of the power factor correction module 20(PFC) during switching between the voltage rising and the voltage falling can be ensured, and the PFC efficiency can be improved.

Specifically, the first half-bridge assembly includes a fifth power transistor Q5 and a sixth power transistor Q6 connected in series, and the first half-bridge assembly includes a seventh power transistor Q7 and an eighth power transistor Q8 connected in series.

Four setting modes of the power factor correction module 20 are described below according to the first to fourth embodiments.

The first embodiment is as follows:

as shown in fig. 1, in the above embodiment, the first electrode of the fifth power transistor Q5 is connected to the high voltage output terminal DC +, the second electrode of the fifth power transistor Q5 is connected to the first electrode of the sixth power transistor Q6, and the second electrode of the sixth power transistor Q6 is connected to the low voltage output terminal DC-; the designated position is a connection point between the fifth power tube Q5 and the sixth power tube Q6; the first electrode of the seventh power transistor Q7 and the second electrode of the eighth power transistor Q8 are configured as the output end of the bus voltage, the second electrode of the seventh power transistor Q7 is connected to the first electrode of the eighth power transistor Q8, and the second electrode of the eighth power transistor Q35is connected to the sixth power transistor.

In this embodiment, as a first setting manner of the power factor correction module 20, the eighth power tube is connected to the low voltage output end, the seventh power tube is not directly connected to the low voltage output end or the high voltage output end, one end of the inductive element L is connected between the seventh power tube Q7 and the eighth power tube, the other end of the inductive element L is connected between the fifth power tube Q5 and the sixth power tube, the fifth power tube is connected to the high voltage output end, and the sixth power tube is connected to the low voltage output end.

Example two:

as shown in fig. 2, in the above embodiment, the first electrode of the sixth power transistor Q6 is connected to the high voltage output terminal DC +, the second electrode of the sixth power transistor Q6 is connected to the first electrode of the fifth power transistor Q5, and the second electrode of the fifth power transistor Q5 is connected to the low voltage output terminal DC-; the designated position is a connection point between the fifth power tube Q5 and the sixth power tube Q6; a first electrode of the eighth power transistor Q8 and a second electrode of the seventh power transistor Q7 are configured as output terminals of a bus voltage, a second electrode of the eighth power transistor Q8 is connected to a first electrode of the seventh power transistor Q7, and a first electrode of the eighth power transistor Q8 is connected to the sixth power transistor Q6.

In this embodiment, as a second configuration of the power factor correction module 20, the eighth power transistor is connected to the high voltage output terminal, one end of the inductive element L is connected between the seventh power transistor Q7 and the eighth power transistor, the other end of the inductive element L is connected between the fifth power transistor Q5 and the sixth power transistor, the fifth power transistor is connected to the high voltage output terminal, and the sixth power transistor is connected to the low voltage output terminal.

Example three:

as shown in fig. 3, in the above embodiment, the first electrode of the sixth power transistor Q6 is connected to the high voltage output terminal DC +, the second electrode of the sixth power transistor Q6 is connected to the first electrode of the fifth power transistor Q5, and the second electrode of the fifth power transistor Q5 is connected to the low voltage output terminal DC-; a first electrode designated as a sixth power transistor Q6; a first electrode of the seventh power transistor Q7 and a second electrode of the eighth power transistor Q8 are configured as output terminals of a bus voltage, a second electrode of the seventh power transistor Q7 is connected to the first electrode of the eighth power transistor Q8, and a second electrode of the eighth power transistor Q35is connected between the fifth power transistor and the sixth power transistor.

In this embodiment, as a third setting of the pfc module 20, compared to the first setting, the fifth power transistor is moved from the home position to a position between the low voltage output terminal and the fifth power transistor, and the same control manner as the first setting can be ensured.

Example four:

as shown in fig. 4, in the above embodiment, the first electrode of the fifth power transistor Q5 is connected to the high voltage output terminal DC +, the second electrode of the fifth power transistor Q5 is connected to the first electrode of the sixth power transistor Q6, and the second electrode of the sixth power transistor Q6 is connected to the low voltage output terminal DC-; a second electrode designated as a sixth power transistor Q6; the second electrode of the seventh power transistor Q7 and the first electrode of the eighth power transistor Q8 are configured as the output end of the bus voltage, the first electrode of the seventh power transistor Q7 is connected to the second electrode of the eighth power transistor Q8, and the first electrode of the eighth power transistor is also connected between the fifth power transistor and the sixth power transistor.

In this embodiment, as a fourth setting mode of the pfc module 20, compared with the third setting mode, the fifth power transistor and the sixth power transistor are moved from being connected in series between the low voltage output terminal and the inductive element L to being connected between the high voltage output terminal and the inductive element L, and the seventh power transistor and the eighth power transistor are interchanged to ensure the same control mode as the first setting mode.

As shown in fig. 5, in the above embodiment, the power factor correction module 20 further includes: the first controller is connected to the controlled poles of the first power transistor Q1, the second power transistor Q2, the third power transistor Q3, the fourth power transistor Q4, the fifth power transistor Q5, the sixth power transistor Q6, the seventh power transistor Q7 and the eighth power transistor Q8, and is configured to transmit the rectified driving signal to the first power transistor Q1, the second power transistor Q2, the third power transistor Q3 and the fourth power transistor Q4, and transmit the switching control signal to the fifth power transistor Q5, the sixth power transistor Q6, the seventh power transistor Q7 and the eighth power transistor Q8.

As shown in fig. 5, in the above embodiment, the method further includes: and the detection module (which can be integrated in the first controller) is suitable for detecting at least one of an alternating current signal, a direct current signal, an inductive current of the inductive element L and a bus voltage at two ends of the capacitive element C, and is also electrically connected with the first controller.

Example five:

as shown in fig. 6, the control method of the voltage regulating circuit according to the embodiment of the present invention includes:

step S602, collecting an electrical signal at a specified position in the voltage regulating circuit.

And step S604, configuring the duty ratio of the switch control signal according to the reference voltage and the electric signal, wherein the duty ratio is suitable for adjusting the bus voltage so as to enable the bus voltage to approach the reference voltage.

In this embodiment, the reference voltage is used to represent a supply voltage required by the load, and the bus voltage output by the voltage regulating circuit can be determined based on the electrical signal by detecting the electrical signal at a specified position in the drive control circuit, so that the duty ratio of the switching control signal can be configured according to the relationship between the bus voltage and the reference voltage, so as to control the on/off of the power tube in the power factor correction module by the switching control signal with the duty ratio, thereby realizing the boost regulation or the buck regulation of the bus voltage to approach the reference voltage, and thus the operating efficiency of the load on the inverter side (for example, a permanent magnet motor in an inverter compressor) can be improved.

In the above embodiment, the driving control circuit further includes a synchronous rectification module, where the synchronous rectification module is suitable for the input ac signal to be configured as a dc signal synchronously, the power factor correction module is connected to the output end of the synchronous rectification module, the power factor correction module further includes an inductive element, and the power factor correction module collects the electrical signal at a specific position in the voltage regulating circuit, and specifically includes: at least one of an alternating current signal, a direct current signal, an inductive current of an inductive element, and a bus voltage is detected.

In this embodiment, by collecting the electrical signal and combining the set reference voltage, the duty ratio of the switching control signal input to the power factor correction module is reliably adjusted.

Example six:

in the above embodiment, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: the reference voltage is in a stable state, and the reference voltage is greater than or equal to a first voltage threshold value, and the control adjusts the duty ratio to enable the power factor correction module to operate according to a boosting mode and/or an intermediate mode so as to increase the bus voltage.

In this embodiment, if the reference voltage is a fixed value or a fixed range and is higher than or close to the rectified maximum dc voltage, the power factor correction module is controlled to operate in a boost mode in one cycle of the ac power supply, so as to implement a boost function.

In the above embodiment, the power factor correction module operates according to a boost mode, and specifically includes: and controlling to switch on the fifth power tube and to switch off the sixth power tube.

As shown in fig. 7, in the above embodiment, the power factor correction module operates according to a boost mode, and further includes: and controlling the seventh power tube and the eighth power tube according to the first group of switch control signals with dead zones and complementary control, so that the eighth power tube is switched off when the seventh power tube is switched on, and the eighth power tube is switched on when the seventh power tube is switched off.

Or, the power factor correction module operates according to a boost mode, and further comprises: and only the eighth power tube is controlled to be opened and closed, and the seventh power tube is kept disconnected.

In this embodiment, a boost circuit is configured by controlling the fifth power transistor to be turned on and the sixth power transistor to be turned off, and the seventh power transistor and the eighth power transistor are controlled according to the switch control signal to boost voltage, and further, the specific boost amount is adjusted by adjusting the duty ratio of the switch control signal.

Example seven:

in the above embodiment, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: and if the reference voltage is in a stable state and the reference voltage is smaller than the first voltage threshold value, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a voltage reduction mode and/or an intermediate mode so as to reduce the bus voltage.

In this embodiment, if the reference voltage is less than the first voltage threshold, indicating that the reference voltage is small, that is, the voltage actually required by the load is small, the power factor correction module is controlled to operate according to the buck mode to reduce the value of the output bus voltage, so as to improve the load operation efficiency.

As shown in fig. 8, in the above embodiment, the operation of the power factor correction module according to the buck mode specifically includes: and controlling to switch on the seventh power tube and controlling to switch off the eighth power tube.

In the above embodiment, the power factor correction module operates according to a buck mode, and further includes: and controlling the fifth power tube and the sixth power tube according to a second group of switch control signals with dead zones and complementary control, so that the sixth power tube is switched off when the fifth power tube is switched on, and the sixth power tube is switched on when the fifth power tube is switched off.

Or the power factor correction module operates according to a buck mode, further comprising: and only the fifth power tube is controlled to be opened and closed, and the sixth power tube is kept disconnected.

In this embodiment, the voltage reduction circuit is configured by controlling to turn on the seventh power transistor and to turn off the eighth power transistor, the voltage reduction is realized by controlling the fifth power transistor and the sixth power transistor according to the switch control signal, and further the specific voltage reduction amount is adjusted by adjusting the duty ratio of the switch control signal.

In the above embodiment, configuring the duty ratio of the switching control signal according to the reference voltage and the electrical signal specifically includes: if the reference voltage is in a stable state and the reference voltage is smaller than the first voltage threshold, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a boost mode, an intermediate mode and a buck mode so as to reduce the bus voltage; or controlling and adjusting the duty ratio to enable the power factor correction module to operate alternately according to the boosting mode and the intermediate mode so as to reduce the bus voltage.

In this embodiment, if the reference voltage is small, the lower limit dc voltage (i.e., the second switching threshold) for switching the buck mode and the upper limit dc voltage (i.e., the first switching threshold) for switching the boost mode may be set according to device performance, and the boost mode, the intermediate mode, and the buck mode are alternately used in one cycle of the ac power supply, so that stable buck is achieved.

As shown in fig. 9, in the above embodiment, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the boost mode, the intermediate mode, and the buck mode specifically includes: configuring a first switching threshold V1 and a second switching threshold V2 according to the performance parameters of the power factor correction module; entering a period of the alternating current signal from a designated phase, and controlling and adjusting the duty ratio in a half period to enable the power factor correction module to operate according to a boosting mode; if the voltage value of the direct current signal rises to be larger than a first switching threshold value V1, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the intermediate mode; if the voltage value rises to be greater than or equal to a second switching threshold value V2, controlling and adjusting the duty ratio to operate according to the voltage reduction mode; if the voltage drops to be less than a second switching threshold value V2, controlling and adjusting the duty ratio to operate according to the intermediate mode; if the voltage drops to be less than the first switching threshold V1, the control adjusts the duty cycle to operate according to the boost mode, wherein the first switching threshold V1 is less than or equal to the second switching threshold V2.

During the positive half period of the ac signal, the first power transistor Q1 and the fourth power transistor Q4 are configured to be in a conducting state, the second power transistor Q2 and the third power transistor Q3 are configured to be in an off state, and during the negative half period of the ac signal, the first power transistor Q1 and the fourth power transistor Q4 are configured to be in an off state, and the second power transistor Q2 and the third power transistor Q3 are configured to be in a conducting state.

Wherein, the power factor correction module specifically includes according to the operation of first intermediate mode: the fifth power transistor Q5 and the eighth power transistor Q8 are controlled to be switched on and off according to a third switch control signal, and the sixth power transistor Q6 and the seventh power transistor Q7 are controlled to be switched on and off according to a fourth switch control signal, wherein the third switch control signal and the fourth switch control signal are complementary driving signals with dead zones.

In this embodiment, as a first implementation manner of the intermediate mode, the same third switch control signal is used to control the fifth power transistor Q5 and the sixth power transistor Q6, so that the seventh power transistor Q7 and the sixth power transistor Q6 operate in the same manner, the same fourth switch control signal is used to control the sixth power transistor Q6 and the seventh power transistor Q7, so that the sixth power transistor Q6 and the seventh power transistor Q7 operate in the same manner, and the third switch control signal and the fourth switch control signal are complementary signals, so as to implement reliable control of the intermediate mode.

As shown in fig. 10, in the above embodiment, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the boost mode, the intermediate mode, and the buck mode specifically includes: configuring a first switching threshold V1 and a second switching threshold V2 according to the performance parameters of the power factor correction module; entering a period of the alternating current signal from a designated phase, and controlling and adjusting the duty ratio in a half period to enable the power factor correction module to operate according to a boosting mode; if the voltage value of the direct current signal rises to be larger than a first switching threshold value V1, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the intermediate mode; if the voltage value rises to be greater than or equal to a second switching threshold value V2, controlling and adjusting the duty ratio to operate according to the voltage reduction mode; if the voltage drops to be less than a second switching threshold value V2, controlling and adjusting the duty ratio to operate according to the intermediate mode; and if the voltage drops to be less than a first switching threshold V1, controlling the regulation duty ratio to operate according to the boosting mode, wherein the first switching threshold V1 is less than a second switching threshold V2.

Wherein, the power factor correction module specifically includes according to the operation of second intermediate mode: collecting an inductive current of an inductive element; if the inductive current is larger than the reference current, controlling the power factor correction module to operate according to a voltage reduction mode; and if the inductive current is less than or equal to the reference current, controlling the power factor correction module to operate according to the boosting mode.

In this embodiment, the step-up or step-down may also be determined based on a change in the inductor current.

In the embodiment, the power factor correction module is controlled to operate according to the intermediate mode between the voltage boosting mode and the voltage reducing mode, and the two power tubes are controlled to be switched to four power tubes and then to the other two power tubes, so that the current stability in the switching process can be improved.

In the above embodiments, if it is detected that the reference voltage drops from greater than the first voltage threshold to less than the first voltage threshold, the power factor correction module is configured to operate according to the buck mode and/or the intermediate mode.

In this embodiment, when the previous period is higher than the first voltage threshold but needs to be adjusted down quickly, the power factor correction module is controlled to switch to the step-down mode or the intermediate mode, so as to reduce the charging time of the inductive element and the voltage across the inductive element during charging, thereby facilitating to pull down the bus voltage quickly.

In the above embodiment, the power factor correction module includes a first half-bridge component and a second half-bridge component, the first half-bridge component is disposed between the low-voltage output terminal DC-and the high-voltage output terminal DC + of the synchronous rectification module, the second half-bridge component is connected to one of the low-voltage output terminal DC-and the high-voltage output terminal DC +, the first half-bridge component includes a fifth power transistor Q5 and a sixth power transistor Q6 connected in series, and the second half-bridge component includes a seventh power transistor Q7 and an eighth power transistor Q8 connected in series.

The power factor correction module operates according to a third intermediate mode, specifically including: and if the reference voltage, the first switching threshold and the second switching threshold are the same, controlling the power factor correction module to operate according to the boosting mode and the step-down mode respectively in a third intermediate mode.

In this embodiment, since the first switching threshold is the same as the second switching threshold, no transition between buck and boost is required, and thus the third intermediate mode may be a boost mode operating alternately with a buck mode.

In the above embodiment, the bus voltage is suitable for supplying power to the load, and the control method further includes: and configuring the reference voltage according to the operating condition of the load.

In the above embodiment, the load includes a motor, and the reference voltage is configured according to an operation condition of the load, specifically including: and configuring reference voltage according to the operation parameters of the motor, the state parameters of the motor, the model parameters of the motor and the modulation ratio of the motor.

In the above embodiment, configuring the reference voltage according to the operation condition of the load specifically includes: the operation condition comprises a motor rotating speed, and if the motor rotating speed is less than or equal to a first rotating speed threshold value, the reference voltage is configured to be less than a second voltage threshold value; if the motor speed is greater than the first speed threshold and less than the second speed threshold, the reference voltage is configured to be greater than the second voltage threshold and less than the first voltage threshold; if the motor speed is greater than or equal to a second speed threshold, the reference voltage is configured to be greater than or equal to a first voltage threshold, wherein the second voltage threshold is less than the first voltage threshold.

In this embodiment, in an application scenario where the variable frequency driving of the permanent magnet synchronous motor is used as a load, preferably, in terms of energy efficiency, a reference voltage value of the buck-boost converter is given according to a rotation speed of the permanent magnet synchronous motor, a motor model, a modulation ratio, a motor state quantity, and the like, and then a working state of the buck-boost converter portion is adjusted, so that efficiency of the motor during low-frequency operation is improved:

As shown in fig. 11, a control device 110 of a voltage regulating circuit according to an embodiment of the present application includes: a memory 1102 and a processor 1104; a memory 1102 for storing program code; a processor 1104 for performing the steps of the control method of the voltage regulation circuit as defined in any one of the above embodiments.

As shown in fig. 12, a drive control circuit according to an embodiment of the present application includes: the voltage regulating circuit defined in the above embodiment, and the control device 110 of the voltage regulating circuit defined in the above embodiment are configured to control the voltage regulating circuit to output the dc bus voltage according to the input ac signal.

Specifically, as shown in fig. 12, the first controller is connected to a first power transistor Q1, a second power transistor Q2, a third power transistor Q3, a fourth power transistor Q4, a fifth power transistor Q5, a sixth power transistor Q6, a seventh power transistor Q7, and an eighth power transistor Q8.

In one aspect, the first controller is configured to send a rectified driving signal to the first power transistor Q1, the second power transistor Q2, the third power transistor Q3, and the fourth power transistor Q4, and send a switching control signal to the fifth power transistor Q5, the sixth power transistor Q6, the seventh power transistor Q7, and the eighth power transistor Q8.

On the other hand, the first controller is also suitable for collecting alternating current, alternating voltage, direct current, direct voltage, inductive current and bus voltage in the voltage regulating circuit.

In the above embodiment, the driving control circuit further includes an inverter IPM electrically connected to the voltage regulating circuit for configuring the dc bus voltage as an ac driving signal; the inverter includes: the IPM controller comprises three switch tube assemblies connected in parallel and a second controller, wherein the second controller is connected to the controlled end of each switch tube assembly to send SVPWM (Space Vector pulse width Modulation) signals to the IPM, and the second controller is also used for collecting load current, such as motor current.

According to the embodiment of the application, the household electrical appliance comprises: a load; the drive control circuit as defined in embodiments of the second aspect of the present application, the drive control circuit being interposed between the ac power source and the load; the drive control circuit is configured to control a power supply signal of the alternating current power supply to supply power to the load.

A computer-readable storage medium according to an embodiment of the application, on which a computer program is stored which, when being executed by a processor, realizes the steps of the control method as defined in any one of the above-mentioned embodiments.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

The term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A voltage regulation circuit, comprising:

the synchronous rectification module comprises a high-voltage output end and a low-voltage output end, and is suitable for synchronously configuring an input alternating current signal into a direct current signal;

a power factor correction module electrically connected to the synchronous rectification module and including a first half-bridge component, a second half-bridge component and an inductive element disposed between the first half-bridge component and the second half-bridge component, the first half-bridge component is arranged between the low-voltage output end and the high-voltage output end, the second half-bridge component comprises a plurality of power tubes which are connected in series, one of the plurality of power tubes is connected to the first half-bridge assembly, one end of the inductive element is connected to any one connection point between the plurality of power tubes, the other end of the inductive element is connected to a designated position of the first half-bridge component, the power factor correction module is suitable for configuring the direct current signal into bus voltage according to a switch control signal, the bus voltage is boosted or dropped relative to the DC signal, and two ends of the second half-bridge component are configured as output ends of the bus voltage.

2. The voltage regulation circuit of claim 1, wherein the synchronous rectification module comprises:

a first and a second rectifying half-bridges connected in parallel, both ends of the first and the second rectifying half-bridges being configured as the low-voltage output end and the high-voltage output end;

the first rectifying half bridge comprises a first power tube and a second power tube which are connected, the second rectifying half bridge comprises a third power tube and a fourth power tube which are connected,

wherein, during a positive half cycle of the alternating current signal, the first power tube and the fourth power tube are both configured to be in an on state, or one of the first power tube and the fourth power tube is configured to be in an off state, or both of the first power tube and the fourth power tube are configured to be in an off state, and the second power tube and the third power tube are configured to be in an on state, or one of the second power tube and the third power tube is configured to be in an off state, or both of the second power tube and the third power tube are configured to be in an off state,

the first power tube, the second power tube, the third power tube and the fourth power tube are all power switch tubes, or the middle parts of the first power tube, the second power tube, the third power tube and the fourth power tube are the power switch tubes, and the parts are power diodes.

3. The voltage regulation circuit of claim 2,

the first half-bridge component comprises a fifth power tube and a sixth power tube which are connected in series in the same direction, the second half-bridge component comprises a seventh power tube and an eighth power tube which are connected in series in the same direction,

the fifth power tube and the eighth power tube are power switching tubes, the sixth power tube and the seventh power tube are power switching tubes or power diodes, the power switching tubes include a first electrode and a second electrode, the second electrode is suitable for being connected with a substrate inside the switching tubes, and the power diodes also include the first electrode and the second electrode.

4. The voltage regulation circuit of claim 3,

a first electrode of the fifth power tube is connected to the high-voltage output end, a second electrode of the fifth power tube is connected to a first electrode of the sixth power tube, and a second electrode of the sixth power tube is connected to the low-voltage output end;

the designated position is a connection point between the fifth power tube and the sixth power tube;

the first electrode of the seventh power tube and the second electrode of the eighth power tube are configured as output ends of bus voltage, the second electrode of the seventh power tube is connected to the first electrode of the eighth power tube, and the second electrode of the eighth power tube is connected to the sixth power tube.

5. The voltage regulation circuit of claim 3,

a first electrode of the sixth power tube is connected to the high-voltage output end, a second electrode of the sixth power tube is connected to a first electrode of the fifth power tube, and a second electrode of the fifth power tube is connected to the low-voltage output end;

the first electrode of the eighth power tube and the second electrode of the seventh power tube are configured as output ends of bus voltage, the second electrode of the eighth power tube is connected to the first electrode of the seventh power tube, and the first electrode of the eighth power tube is connected to the sixth power tube.

6. The voltage regulation circuit of claim 3,

the designated position is a first electrode of the sixth power tube;

the first electrode of the seventh power tube and the second electrode of the eighth power tube are configured as output ends of bus voltage, the second electrode of the seventh power tube is connected to the first electrode of the eighth power tube, and the second electrode of the eighth power tube is connected between the fifth power tube and the sixth power tube.

7. The voltage regulation circuit of claim 3,

the designated position is a second electrode of the sixth power tube;

the second electrode of the seventh power tube and the first electrode of the eighth power tube are configured as output ends of bus voltage, the first electrode of the seventh power tube is connected to the second electrode of the eighth power tube, and the first electrode of the eighth power tube is also connected between the fifth power tube and the sixth power tube.

8. The voltage regulation circuit of any one of claims 3 to 7, wherein the power factor correction module further comprises:

a capacitive element connected to both ends of the second half-bridge assembly.

9. The voltage regulation circuit of claim 8, wherein the power factor correction module further comprises:

the first controller is connected to the first power tube, the second power tube, the third power tube, the fourth power tube, the fifth power tube, the sixth power tube, the seventh power tube and the eighth power tube, and is used for sending a rectification driving signal to the first power tube and the second power tube and sending the switching control signal to the fifth power tube, the sixth power tube, the seventh power tube and the eighth power tube.

10. The voltage regulation circuit of claim 9, further comprising:

and the detection module is suitable for detecting at least one of the alternating current signal, the direct current signal, the inductive current of the inductive element and the bus voltage at two ends of the capacitive element, and is also electrically connected with the first controller.

11. A control method for a voltage regulating circuit, the voltage regulating circuit comprising a synchronous rectification module and a power factor correction module electrically connected with each other, the synchronous rectification module comprising four power tubes, the four power tubes synchronously configuring an input ac signal into a dc signal according to a rectification driving signal, the power factor correction module being adapted to configure the dc signal into an output bus voltage according to a received switching control signal, the control method comprising:

collecting an electric signal at a specified position in the voltage regulating circuit;

configuring a duty cycle of the switch control signal according to a reference voltage and the electrical signal, the duty cycle being adapted to regulate the bus voltage such that the bus voltage approaches the reference voltage.

12. The control method according to claim 11, wherein the pfc module further includes an inductive element, and the acquiring the electrical signal at a specific position in the voltage regulating circuit specifically includes:

and detecting at least one of the alternating current signal, the direct current signal, the inductive current of the inductive element and the bus voltage.

13. The control method according to claim 12, wherein configuring the duty cycle of the switching control signal according to the reference voltage and the electrical signal specifically comprises:

the reference voltage is in a stable state and is greater than or equal to a first voltage threshold value, and the control adjusts the duty ratio to enable the power factor correction module to operate according to a boost mode and/or an intermediate mode to increase the bus voltage.

14. The control method according to claim 13, wherein configuring the duty cycle of the switching control signal according to the reference voltage and the electrical signal specifically comprises:

and if the reference voltage is in a stable state and the reference voltage is smaller than the first voltage threshold, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to a voltage reduction mode and/or an intermediate mode so as to reduce the bus voltage.

15. The control method according to claim 14, wherein configuring the duty cycle of the switching control signal according to the reference voltage and the electrical signal specifically comprises:

the reference voltage is in a stable state, and the reference voltage is smaller than the first voltage threshold, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the boost mode, the intermediate mode and the buck mode so as to reduce the bus voltage;

or controlling to adjust the duty cycle to cause the power factor correction module to operate alternately according to the boost mode and the intermediate mode to reduce the bus voltage.

16. The control method of claim 15, wherein the controlling adjusts the duty cycle to cause the power factor correction module to operate according to the boost mode, the intermediate mode, and the buck mode, including:

configuring a first switching threshold value and a second switching threshold value according to the performance parameters of the power factor correction module;

if the voltage value of the direct current signal is smaller than the first switching threshold value, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the boosting mode;

if the voltage value rises to be larger than or equal to the first switching threshold value, controlling and adjusting the duty ratio to enable the power factor correction module to operate according to the intermediate mode;

if the voltage value rises to be larger than or equal to the second switching threshold value, controlling and adjusting the duty ratio to operate according to the voltage reduction mode;

if the voltage drops to be smaller than the second switching threshold value and still larger than the first switching threshold value, controlling and adjusting the duty ratio to operate according to the intermediate mode;

if the voltage drops to be less than the first switching threshold value, controlling and adjusting the duty ratio to operate according to the boosting mode,

wherein the first handover threshold is less than the second handover threshold.

17. The control method according to claim 15, characterized by further comprising:

if the reference voltage is detected to be decreased from being greater than the first voltage threshold to being less than the first voltage threshold, the power factor correction module is configured to operate according to a buck mode and/or the intermediate mode.

18. The control method according to claim 17, wherein the power factor correction module comprises a first half-bridge component and a second half-bridge component, the first half-bridge component is disposed between a low-voltage output end and a high-voltage output end of the synchronous rectification module, the second half-bridge component is connected to one of the low-voltage output end and the high-voltage output end, the first half-bridge component comprises a fifth power tube and a sixth power tube connected in series, and the second half-bridge component comprises a seventh power tube and an eighth power tube connected in series.

19. The control method according to claim 18, wherein the power factor correction module operates according to a boost mode, specifically comprising:

and controlling to switch on the fifth power tube and controlling to switch off the sixth power tube.

20. The control method of claim 19, wherein the power factor correction module operates according to a boost mode, further comprising:

controlling the seventh power tube and the eighth power tube or only controlling the eighth power tube according to a first group of switch control signals which are provided with dead zones and are complementarily controlled, so that the eighth power tube is switched off when the seventh power tube is switched on, and the eighth power tube is switched on when the seventh power tube is switched off; or

And only the eighth power tube is controlled to be opened and closed, and the seventh power tube is kept disconnected.

21. The control method according to claim 18, wherein the pfc module operates according to a buck mode, specifically comprising:

and controlling to switch on the seventh power tube and controlling to switch off the eighth power tube.

22. The control method of claim 21, wherein the power factor correction module operates according to a buck mode, further comprising:

controlling the fifth power tube and the sixth power tube according to a second group of switch control signals with dead zones and complementary control, so that when the fifth power tube is switched on, the sixth power tube is switched off, and when the fifth power tube is switched off, the sixth power tube is switched on; or

And only the fifth power tube is controlled to be opened and closed, and the sixth power tube is kept disconnected.

23. The control method according to claim 18, wherein the intermediate mode comprises a first intermediate mode, and the power factor correction module operates according to the intermediate mode, specifically comprising:

in the first intermediate mode, the fifth power tube and the eighth power tube are controlled to be opened and closed according to a third switch control signal, the sixth power tube and the seventh power tube are controlled to be opened and closed according to a fourth switch control signal, and the third switch control signal and the fourth switch control signal are complementary driving signals with dead zones.

24. The control method according to claim 18, wherein the intermediate modes further include a second intermediate mode, and the power factor correction module operates according to the intermediate mode, specifically including:

in the second intermediate mode, collecting an inductive current of the inductive element;

if the inductive current is larger than the reference current, controlling the power factor correction module to operate according to the voltage reduction mode;

and if the inductive current is less than or equal to the reference current, controlling the power factor correction module to operate according to the boosting mode.

25. The control method according to claim 16, wherein the intermediate modes further include a third intermediate mode, and the power factor correction module operates according to the intermediate mode, specifically including:

and if the reference voltage, the first switching threshold and the second switching threshold are the same, controlling the power factor correction module to operate according to the boosting mode and the buck mode respectively in the third intermediate mode.

26. The control method of any one of claims 13 to 25, wherein the bus voltage is adapted to power a load, the control method further comprising:

and configuring the reference voltage according to the operating condition of the load.

27. The control method according to claim 26, wherein the load comprises a motor, and the configuring the reference voltage according to the operating condition of the load specifically comprises:

and configuring the reference voltage according to the operation parameters of the motor, the state parameters of the motor, the model parameters of the motor and the modulation ratio of the motor.

28. The control method according to claim 26, wherein configuring the reference voltage according to the operating condition of the load specifically comprises:

the operating condition comprises a motor speed, and if the motor speed is less than or equal to a first speed threshold, the reference voltage is configured to be less than a second voltage threshold;

if the motor speed is greater than the first speed threshold and less than a second speed threshold, the reference voltage is configured to be greater than the second voltage threshold and less than the first voltage threshold;

if the motor speed is greater than or equal to the second speed threshold, the reference voltage is configured to be greater than or equal to the first voltage threshold,

wherein the second voltage threshold is less than the first voltage threshold.

29. A control device for a voltage regulating circuit, wherein the driving control circuit comprises a power factor correction module, the power factor correction module is adapted to configure an output bus voltage according to an input dc signal according to a received switch control signal, the control device comprises: a memory and a processor;

the memory for storing program code;

the processor, configured to call the program code to execute the control method according to any one of claims 11 to 28.

30. A drive control circuit, comprising:

a voltage regulation circuit as claimed in any one of claims 1 to 10;

a control device for a voltage regulating circuit as claimed in claim 29, said control device being adapted to control said voltage regulating circuit to output a dc bus voltage in response to an input ac signal.

31. The drive control circuit of claim 30, further comprising:

an inverter electrically connected to the voltage regulating circuit for configuring the DC bus voltage as an AC drive signal;

the inverter includes: the three parallel switch tube assemblies and a second controller are connected to the controlled end of each switch tube assembly.

32. An appliance, comprising:

a load;

the drive control circuit according to claim 30 or 31, which is connected between an alternating current power source and the load; the drive control circuit is configured to control a power supply signal of the alternating current power supply to supply power to the load.

33. The home device of claim 32,

the household appliance comprises at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector and a computer host.

34. A computer-readable storage medium on which an operation control program is stored, characterized in that the operation control program, when executed by a processor, implements the control method of any one of claims 11 to 28.