CN109889031B

CN109889031B - Operation control method, device, circuit, household appliance and computer storage medium

Info

Publication number: CN109889031B
Application number: CN201910290804.2A
Authority: CN
Inventors: 黄招彬; 时崎久; 曾贤杰; 梁国强; 霍军亚
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: 2019-04-11
Filing date: 2019-04-11
Publication date: 2021-05-11
Anticipated expiration: 2039-04-11
Also published as: CN109889031A

Abstract

The invention provides an operation control method, an operation control device, an operation control circuit, household electrical appliance equipment and a computer storage medium, wherein the method comprises the following steps: detecting the supply signal and a load voltage of the first capacitive element; comparing the magnitude relation between the power supply signal and a power supply signal threshold value in real time; and determining whether to control the first capacitive element to perform voltage compensation on the inverter according to the magnitude relation and the voltage of the first capacitive element, wherein the inverter is connected between the first capacitive element and the load, and the inverter is configured to drive the load to operate. By carrying out voltage compensation on the inverter, the phenomenon that the bus voltage is insufficient and cannot output power in the related technology is avoided, and then beat frequency noise is avoided.

Description

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

Technical Field

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

Background

In general, the Power Factor of a passive PFC (Power Factor Correction) circuit is low, and a capacitor with a large capacity is used, so that the cost of the passive PFC circuit is high.

The circuit method without the electrolytic capacitor has the following defects:

firstly, the direct-current bus voltage has large fluctuation, so that the load current has large fluctuation and the load current peak value is high, and therefore, the over-current protection with higher specification needs to be set aiming at the power module, so that the cost is increased;

secondly, the problems of beat frequency noise and the like are caused by the periodic phenomenon that bus voltage with the same power frequency is insufficient and cannot output power.

Therefore, a driving control circuit that can solve the above technical problems is needed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, in an aspect of the first aspect of the present invention, an operation control method is provided.

In a second aspect of the present invention, an operation control device is provided.

In an embodiment of the third aspect of the present invention, a driving control circuit is provided.

In a fourth aspect of the present invention, a home appliance is provided.

In an aspect of the fifth aspect of the present invention, a computer-readable storage medium is provided.

In an aspect of the first aspect of the present invention, an operation control method is provided, which is applied to a driving control circuit, where the driving control circuit is configured to supply a load with a power supply signal input by a power grid system, a controllable first capacitive element is disposed on a bus line of the driving control circuit, the power supply signal is capable of charging the first capacitive element, and the first capacitive element is capable of performing voltage compensation on an inverter, and the operation control method includes: detecting the supply signal and the voltage of the first capacitive element; comparing the magnitude relation between the power supply signal and a power supply signal threshold value in real time; and determining whether to control the first capacitive element to perform voltage compensation on the inverter according to the magnitude relation and the voltage of the first capacitive element, wherein the inverter is connected between the first capacitive element and the load, and the inverter is configured to drive the load to operate.

In the operation control method suitable for the driving control circuit, the driving control circuit outputs a power supply signal input by a power grid system to a load for supplying power, a controllable first capacitive element is arranged on a bus line of the driving control circuit, the power supply signal can charge the first capacitive element, the first capacitive element can compensate the voltage of an inverter, wherein the inverter is connected between the first capacitive element and the load, the inverter is configured to drive the load to operate, the magnitude relation between the power supply signal and a power supply signal threshold value is compared in real time by detecting the power supply signal and the voltage of the first capacitive element, whether the first capacitive element is controlled to compensate the voltage of the inverter or not is determined according to the comparison result of the magnitude relation and the voltage of the first capacitive element, and the voltage of the inverter is compensated by using the first capacitive element, the occurrence of the periodic phenomenon that the bus voltage is insufficient and the force cannot be applied in the related technology is avoided, and then the beat frequency noise is avoided.

In addition, the operation control method according to the above embodiment of the present invention may further have the following additional technical features:

in the above technical solution, the driving control circuit further includes a switching device and a reverse bias freewheeling diode, the first capacitive element and the switching device are connected in series in the bus line, and the switching device is connected in parallel with the reverse bias freewheeling diode, wherein if the switching device is turned on, the first capacitive element performs voltage compensation on the inverter through the switching device; if the switching device is turned off, the power supply signal charges or does not act on the first capacitive element through the reverse bias freewheeling diode.

In the technical scheme, the driving control circuit comprises a switching device and a reverse bias freewheeling diode, wherein a first capacitive element and the switching device are connected in series in the bus line, the switching device is connected with the reverse bias freewheeling diode in parallel, and the first capacitive element performs voltage compensation on the inverter through the switching device under the condition that the switching device is conducted, so that the periodic phenomenon that the bus voltage is insufficient and cannot output power at the current stage is avoided, and further beat frequency noise is avoided; the first capacitive element cannot compensate the voltage of the inverter through the switching device when the switching device is in an off state, and the first capacitive element can be charged through the reverse-biased freewheeling diode because the switching device is connected in parallel with the reverse-biased freewheeling diode, so that sufficient energy can be stored in the first capacitive element to compensate the voltage when the switching device is in an on state, or the alternating voltage supply signal does not act on the first capacitive element through the reverse-biased freewheeling diode when the switching device is in an off state.

In any of the above technical solutions, further, the method further includes: detecting whether the power supply signal increases with time during the voltage compensation of the inverter by the first capacitive element; if the power supply signal is detected to be increased along with the time, detecting whether the voltage of the bus line is reduced to the power supply signal threshold value; and if the voltage of the bus line is detected to be reduced to the power supply signal threshold value, controlling the switching device to be switched off.

In the technical scheme, in the process of performing voltage compensation on the inverter by using the first capacitive element, if the voltage of a bus line is detected to be reduced to the threshold value of the power supply signal, the switching device is controlled to be turned off, the voltage compensation of the first capacitive element on the inverter is stopped, and further, in the process of performing voltage compensation on the inverter by using the first capacitive element, whether the power supply signal is increased along with time is detected; and if the power supply signal is detected to be increased along with the time, detecting whether the voltage of the bus line is reduced to the power supply signal threshold value, and further determining whether the first capacitive element performs voltage compensation on the inverter according to the change condition of the power supply signal along with the time so as to realize the voltage compensation on the inverter.

In any of the above technical solutions, further determining whether to control the first capacitive element to perform voltage compensation on the inverter according to the magnitude relationship and the voltage of the first capacitive element specifically includes: and if the power supply signal is determined to be less than or equal to the power supply signal threshold value and the power supply signal is determined to be less than or equal to the voltage of the first capacitive element, controlling the first capacitive element to perform voltage compensation on the inverter.

In this technical solution, the step of controlling the first capacitive element to perform voltage compensation on the inverter according to the magnitude relationship between the power supply signal and the power supply signal threshold and the voltage determination of the first capacitive element specifically includes: if the power supply signal is determined to be less than or equal to the power supply signal threshold value and the power supply signal is determined to be less than or equal to the voltage of the first capacitive element, the first capacitive element is controlled to perform voltage compensation on the inverter, the periodic phenomenon that bus voltage is insufficient and power cannot be output in the related technology is avoided, and then beat frequency noise is avoided.

In any of the above technical solutions, further, the value range of the power supply signal threshold is 10V to 350V.

In any of the above technical solutions, further, before detecting the power supply signal and the voltage of the first capacitive element, the method further includes: determining a rated power of the load; and determining a corresponding power supply signal threshold according to the rated power, wherein the rated power and the power supply signal threshold are in negative correlation.

In the technical scheme, before the power supply signal and the voltage of the first capacitive element are detected, the rated power of the load is determined, a corresponding power supply signal threshold value is determined according to the rated power, the power supply signal threshold value is set through the change of the rated power of the load, the first capacitive element is dynamically controlled to perform voltage compensation on the inverter, the influence of the fixed power supply signal threshold value on the insufficient power supply voltage is reduced, and beat frequency noise occurs.

In the technical solution of the second aspect of the present invention, an operation control device is provided, where the operation control device is provided with a processor, and when the processor executes a computer program, the operation control method according to any one of the above-mentioned embodiments can be implemented, so that the operation control device has the beneficial technical effects of any one of the above-mentioned operation control methods, and details thereof are not repeated here.

In an aspect of the third aspect of the present invention, a drive control circuit is provided, where the drive control circuit is configured to supply a load with a power supply signal input from a power grid system, and the drive control circuit is connected to any one of the operation control devices, and the drive control circuit includes: the voltage absorption compensation branch circuit comprises a first capacitive element and a switching device which are connected in series and is connected between the power grid system and the inverter; a switching device is connected in series with the first capacitive element, the switching device configured to control the first capacitive element to charge or discharge, wherein the first capacitive element discharge voltage compensates the inverter, the inverter configured to drive a load to operate.

In the technical scheme, the driving control circuit is provided with a voltage novice compensation branch circuit which comprises a first capacitive element and a switching device which are mutually connected in series, and under the control of the switching device, the first capacitive element is charged to reduce the current amplitude of a load or discharged to perform voltage compensation on the inverter.

By applying the technical scheme provided by the invention, the switching device and the first capacitive element are arranged to selectively absorb overvoltage or perform voltage compensation, and if the power supply signal is too high, the first capacitive element starts to absorb the overvoltage signal and realize charging so as to reduce the peak value of the load current.

If the power supply signal is too low, the first capacitive element starts to discharge so as to realize voltage compensation, wherein the first capacitive element does not need to select a capacitor with a large capacity, the cost of a voltage compensation circuit can be reduced, meanwhile, the first capacitive element absorbs an overvoltage signal and an overcurrent signal, the peak value of a load current is effectively reduced, further, voltage compensation is realized through the first capacitive element when the voltage is low, the power fluctuation of a system is avoided, and the problem of beat frequency noise caused when the input power supply signal is too low is solved.

Specifically, the first capacitive element can use an electrolytic capacitor with a capacitance value ranging from 10uF to 2000uF, and a capacitor with a larger capacitance value is not required to be selected, so that better cost control can be realized, and the two effects of reducing the load current peak value and compensating the voltage are achieved.

The first power supply signal threshold and the second power supply signal threshold may be the same value or different values, and the first power supply signal threshold and the second power supply signal threshold are mainly determined by the power of the load and the power of the inverter.

In addition, the driving control circuit in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical solution, further, the inverter is connected between a high voltage bus and a low voltage bus, one end of the switching device is connected to the high voltage bus, and one end of the first capacitive element is connected to the low voltage bus.

In the technical scheme, the inverter is connected between the high-voltage bus and the low-voltage bus, and converts a direct current signal on the bus into an alternating current signal for driving a load to operate. One end of the switch element is connected to the high-voltage bus, and one end of the first capacitive element is connected to the low-voltage bus, so that the charging and discharging of the first capacitive element are controlled.

In any of the above technical solutions, further, the driving control circuit further includes: a controller connected to the switching device to regulate an on state of the switching device; if the power supply signal is greater than or equal to a first power supply signal threshold value, the controller triggers the switching device to be conducted in a first mode to control the first capacitive element to be charged, and if the controller detects that the power supply signal is smaller than a second power supply signal threshold value, the controller triggers the switching device to be conducted in a second mode to control the first capacitive element to be discharged.

In the technical scheme, the controller controls the conduction mode of the switching device according to the magnitude of the power supply signal. Specifically, when the alternating voltage signal exceeds a first voltage threshold, which indicates that the alternating voltage is high, the controller controls the switching device to be turned on in a first mode to charge the first capacitive element, so as to reduce the amplitude of the load current; when the alternating voltage signal is smaller than the second voltage threshold, the alternating voltage is lower than the second voltage threshold, and the controller controls the switching device to be conducted in the second mode at the moment, so that the first capacitive element is discharged, and power compensation is performed on the inverter.

The power supply signal may be an ac voltage input to the rectifier module, or may be a dc voltage output by the rectifier module.

In the above technical solution, further, the switching device includes: a power tube connected in series with the first capacitive element, wherein a control end of the power tube is connected to a command output end of the controller, the command output end outputs a control command to the control end, and the control command is configured to control the power tube to be switched on or switched off; and two ends of the reverse-bias freewheeling diode are respectively connected to the drain electrode and the source electrode of the power tube, wherein if the power tube is switched on, the first capacitive element discharges to the load through the power tube, and if the power tube is switched off, the first capacitive element charges or does not act through the reverse-bias freewheeling diode.

In the technical scheme, the switching device comprises a power tube and a reverse bias freewheeling diode, the power tube is connected with a first capacitive element in series, an instruction output end of a controller is connected to a control end of the power tube to send a control instruction to the power tube, the power tube changes a conduction state (conduction or cut-off) according to the control instruction, two ends of the reverse bias freewheeling diode are respectively connected with a drain electrode and a source electrode of the power tube, when the power tube is conducted, the first capacitive element discharges to a load through the power tube to realize voltage compensation, and when the power tube is cut off, an input voltage signal charges the first capacitive element through the reverse bias freewheeling diode to reduce a load current peak value. When the load current peak is at a normal level, the first capacitive element does not operate without lowering the load current peak.

The first capacitive element is charged through the reverse-biased freewheeling diode, that is, a power supply signal charges the first capacitive element through the reverse-biased freewheeling diode, and simultaneously, the power supply signal supplies power to a running load, and the charging process of the first capacitive element is a complete charging process, that is, when the first capacitive element is discharged, the discharging voltage of the first capacitive element is greater than the power supply voltage on the line, so that voltage compensation is realized.

Specifically, the power Transistor may preferably be an IGBT (Insulated Gate Bipolar Transistor) type power Transistor, or may also be an MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), and the reverse bias freewheeling diode may be independently provided or may be integrally provided with the IGBT or the MOSFET.

In any of the above technical solutions, further, the driving control circuit further includes: the rectifier module is arranged between the input end of the first capacitive element and the harmonic filtering module, and is configured to convert the power supply signal into a direct current signal, wherein the direct current signal is configured to charge the first capacitive element and provide the electric quantity required by the operation of the load, and the inverter is configured to control the direct current signal to drive the operation of the load.

In the technical scheme, a rectifying module is arranged in a driving control circuit and connected between an input end of a first capacitive element and a filtering module, a power supply signal input by a power grid system enters the rectifying module after noise is filtered by the filtering module, the rectifying module rectifies the power supply signal and outputs a direct current signal obtained after rectification to the first capacitive element and a load part so as to charge the first capacitive element and provide electric quantity required by operation for the load.

In any one of the above technical solutions, further, if the load includes a single-phase ac load, the inverter includes a corresponding single-phase inverter circuit, and the single-phase inverter circuit includes: the two upper bridge arm power devices and the two lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch circuit and the input end of the load, if the load comprises a three-phase alternating current load, the inverter comprises a corresponding three-phase inverter circuit, and the three-phase inverter circuit comprises: and the three upper bridge arm power devices and the three lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch and the input end of the load, wherein the upper bridge arm power device of one phase is connected with the lower bridge arm power device of a corresponding phase in series, and the upper bridge arm power device and the lower bridge arm power device of the same phase are not conducted at the same time.

In the technical scheme, if the load comprises a single-phase alternating current load, a corresponding single-phase inverter circuit is arranged in the inverter to output a corresponding driving signal to the single-phase alternating current load. Specifically, the single-phase ac load may be a single-phase motor, or may be a single-phase inductive load.

The single-phase inverter circuit comprises two upper bridge arm power devices and two lower bridge arm power devices, and is connected between an output section of the first capacitive element and an input end of a load.

If the load comprises a three-phase alternating current load, a corresponding three-phase inverter circuit is arranged in the inverter to output a corresponding driving signal to the three-phase alternating current load. Specifically, the three-phase ac load may be an induction motor or a permanent magnet synchronous motor.

The three-phase inverter circuit comprises three upper bridge arm power devices and three lower bridge arm power devices, and is connected between the output section of the first capacitive element and the input end of the load. The upper bridge arm power device of each phase is connected with the lower bridge arm power device of the corresponding phase in series, the upper bridge arm power device and the lower bridge arm power device of the same phase are not conducted simultaneously, and output a one-phase driving signal to a load of a three-phase alternating current load, and the upper bridge arm power devices and the lower bridge arm power devices of three phases are conducted alternately and output a three-phase driving signal to the load of the three-phase alternating current load.

In any of the above technical solutions, further, a reverse bias freewheeling diode is connected between the source and the drain of any one of the upper bridge arm power devices, and is referred to as an upper bridge arm reverse bias freewheeling diode, and a reverse bias freewheeling diode is connected between the source and the drain of any one of the lower bridge arm power devices, and is referred to as a lower bridge arm reverse bias freewheeling diode.

In the technical scheme, a reverse bias freewheeling diode, specifically an upper bridge arm reverse bias freewheeling diode and a lower bridge arm reverse bias freewheeling diode, is indirectly arranged between the source and the drain of the upper bridge arm power device and the lower bridge arm power device, in each phase, the upper bridge arm power device and the lower bridge arm reverse bias freewheeling diode in the corresponding phase form a conduction line, and the lower bridge arm power device and the upper bridge arm reverse bias freewheeling diode in the corresponding phase form a conduction line.

In any one of the above technical solutions, further, any one of the upper bridge arm power devices includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, and any one of the lower bridge arm power devices includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, wherein a collector of the insulated gate bipolar transistor is connected as the drain, and an emitter of the insulated gate bipolar transistor is connected as the source.

In this technical solution, the upper arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and/or an insulated gate bipolar transistor (i.e., IGBT), and when the insulated gate bipolar transistor is used, a collector of the insulated gate bipolar transistor is connected as the drain, and an emitter of the insulated gate bipolar transistor is connected as the source. The lower arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and/or an insulated gate bipolar transistor (i.e., IGBT), and when the insulated gate bipolar transistor is used, a collector of the insulated gate bipolar transistor is connected as the drain, and an emitter of the insulated gate bipolar transistor is connected as the source.

In any one of the above technical solutions, further, the power transistor includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, where a gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal of the controller as the control terminal, and a base of the insulated gate bipolar transistor is connected to the command output terminal of the controller as the control terminal.

In the technical scheme, the power tube comprises a metal oxide semiconductor field effect transistor (namely MOSFET) and/or an insulated gate bipolar transistor (namely IGBT), wherein a grid electrode of the MOSFET is used as a control end, a command output end of the controller is connected with the grid electrode of the MOSFET, the MOSFET of the IGBT is used as a control end, and the command output end of the controller is connected with a base electrode of the IGBT.

In any of the above technical solutions, further, the load of the load includes a fan and/or a compressor.

In any of the above technical solutions, further, the load of the load includes an induction motor and/or a permanent magnet synchronous motor.

In any of the above technical solutions, further, the first capacitive element includes an electrolytic capacitor, and/or the first capacitive element includes one capacitive element, and/or the first capacitive element includes a plurality of capacitive elements connected in series and/or in parallel.

In this embodiment, the first capacitive element uses a single electrolytic capacitor, or a plurality of electrolytic capacitors connected in series and/or in parallel may be used, so as to freely set the capacitance value equivalent to the first capacitive element.

In any of the above technical solutions, further, a value range of a capacitance value of the first capacitive element is 10uF to 2000 uF.

Optionally, the capacitance value of the first capacitive element is 82 uF.

Optionally, the capacitance value of the first capacitive element is 220 uF.

Optionally, the capacitance value of the first capacitive element is 470 uF.

Optionally, the capacitance value of the first capacitive element is 560 uF.

Optionally, the capacitance value of the first capacitive element is 680 uF.

Optionally, the capacitance value of the first capacitive element is 820 uF.

In any one of the foregoing technical solutions, further, the power supply of the controller includes an isolation power supply or a bootstrap power supply, where the bootstrap power supply includes a bootstrap power supply circuit, a bootstrap diode, and a bootstrap capacitor in the inverter, an anode of the bootstrap diode is connected to an anode of the bootstrap power supply circuit, a cathode of the bootstrap diode is connected to a cathode of the bootstrap capacitor, and an anode of the bootstrap capacitor is connected to the power supply terminal of the controller.

In this technical scheme, the controller is provided with power supply, specifically, power supply includes isolation power supply or bootstrap power supply, when power supply is isolation power supply, be connected to the feeder ear of controller through isolation power supply, provide the electric energy for the controller, when power supply is bootstrap power supply, bootstrap power supply includes the bootstrap supply circuit of establishing ties, isolation power supply or bootstrap power supply, bootstrap supply circuit's negative pole is connected with the low pressure generating line in the busbar circuit, bootstrap supply circuit's positive pole is connected with bootstrap diode's positive pole, bootstrap diode's negative pole is connected with bootstrap capacitor's positive pole simultaneously, bootstrap capacitor's negative pole is connected to the feeder ear of controller, for the controller provides the electric energy.

In any of the above technical solutions, further, the voltage absorption compensation branch further includes: the resistance element is used for adjusting the current flowing through the first capacitive element, and the inductance element is used for filtering alternating current noise flowing through the first capacitive element.

In this technical solution, the resistive element and/or the inductive element may be connected between the high-voltage bus and the switching device, may also be connected between the first capacitive element and the low-voltage bus, and may also be connected between the switching device and the first capacitive element.

In addition, the resistive element may comprise a resistor, or a plurality of resistors connected in series and/or in parallel, and similarly, the inductive element may comprise an inductor, or a plurality of inductors connected in series and/or in parallel.

In any of the above technical solutions, further, a value range of the resistance element is 0.1m Ω to 10 Ω, and a value range of the inductance element is 1uH to 10 mH.

A fourth aspect of the present invention provides a home appliance comprising: a load; the drive control circuit of any preceding claim, interposed between a grid system and a load, the drive control circuit configured to control the grid system to supply power to the load.

In this technical solution, the home appliance includes the driving control circuit described in any one of the above technical solutions, so that the home appliance includes all the beneficial effects of the driving control circuit described in any one of the above technical solutions, and details are not repeated again.

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

A fifth aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed, carries out the steps of the operation control method as claimed in any one of the preceding claims.

In this technical solution, a computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the operation control method in any one of the above technical solutions, so that the computer-readable storage medium includes all beneficial effects of the operation control method in any one of the above technical solutions, and is not described again.

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 flow diagram of an operational control method according to an embodiment of the invention;

FIG. 2 shows a flow diagram of a switching device control according to one embodiment of the present invention;

FIG. 3 shows a flow diagram of an operational control method according to another embodiment of the present invention;

FIG. 4 illustrates a flow diagram of a power signal threshold determination according to one embodiment of the present invention;

FIG. 5 shows a schematic diagram of switching device drive signals when the load is too light, according to one embodiment of the invention;

fig. 6 shows a schematic diagram of the inverter supply voltage corresponding to fig. 5;

FIG. 7 shows a schematic diagram of switching device drive signals when the load is too heavy according to one embodiment of the invention;

fig. 8 shows a schematic diagram of the corresponding inverter supply voltage of fig. 7;

FIG. 9 shows a switching device drive signal diagram according to an embodiment of the invention;

FIG. 10 shows a switching device drive signal schematic according to another embodiment of the present invention;

FIG. 11 shows a schematic block diagram of an operation control device according to an embodiment of the present invention;

FIG. 12 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;

FIG. 13 is a schematic diagram illustrating capacitive element charging in a drive control circuit according to one embodiment of the present invention;

FIG. 14 shows a schematic diagram of capacitive element discharge in a drive control circuit according to one embodiment of the invention;

FIG. 15 shows a schematic diagram of a drive control circuit according to another embodiment of the invention;

FIG. 16 is a schematic diagram illustrating capacitive element charging in a drive control circuit according to another embodiment of the present invention;

FIG. 17 is a schematic diagram illustrating discharge of a capacitive element in a drive control circuit according to another embodiment of the present invention;

FIG. 18 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 19 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 20 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 21 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 22 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 23 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 24 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 25 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 26 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 27 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 28 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 29 shows a schematic diagram of a drive control circuit according to another embodiment of the invention;

FIG. 30 shows a schematic diagram of a drive control circuit according to another embodiment of the invention;

FIG. 31 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 32 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 33 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 34 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 35 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 36 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 37 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 38 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 39 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

FIG. 40 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;

fig. 41 illustrates a block diagram of a home device in accordance with one embodiment of the present invention.

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 to the specific embodiments disclosed below.

In an embodiment of the first aspect of the present invention, as shown in fig. 1, an operation control method is provided, which is applied to a driving control circuit, where the driving control circuit is configured to supply a power supply signal input by a power grid system to a load, a first controllable capacitive element is disposed on a bus line of the driving control circuit, the power supply signal is capable of charging the first capacitive element, and the first capacitive element is capable of performing voltage compensation on an inverter, and the operation control method includes:

s102, detecting the power supply signal and the voltage of the first capacitive element;

s104, comparing the magnitude relation between the power supply signal and the power supply signal threshold value in real time;

and S106, determining whether to control the first capacitive element to perform voltage compensation on the inverter or not according to the magnitude relation and the voltage of the first capacitive element.

Wherein the inverter is connected between the first capacitive element and the load, and the inverter is configured to drive the load to operate.

In an embodiment of the present invention, as shown in fig. 1, an operation control method is provided, which is suitable for a driving control circuit, where the driving control circuit is configured to supply a power supply signal input by a power grid system to a load, a bus line of the driving control circuit is provided with a controllable first capacitive element, the power supply signal is capable of charging the first capacitive element, the first capacitive element is capable of performing voltage compensation on the inverter, the driving control circuit further includes a switching device and a reverse bias freewheeling diode, the first capacitive element is connected in series with the switching device in the bus line, the switching device is connected in parallel with the reverse bias freewheeling diode, and if the switching device is turned on, the first capacitive element performs voltage compensation on the inverter via the switching device; if the switching device is turned off, the power supply signal charges or does not act on the first capacitive element through the reverse bias freewheeling diode.

In the embodiment, the driving control circuit comprises a switching device and a reverse bias freewheeling diode, wherein the first capacitive element and the switching device are connected in series in the bus line, the switching device is connected in parallel with the reverse bias freewheeling diode, and the first capacitive element performs voltage compensation on the inverter through the switching device under the condition that the switching device is conducted, so that the periodic phenomenon that the bus voltage is insufficient and the output cannot be output at the current stage is avoided, and further the beat frequency noise is avoided; the first capacitive element cannot compensate the voltage of the inverter through the switching device when the switching device is in an off state, and the first capacitive element can be charged through the reverse-biased freewheeling diode because the switching device is connected in parallel with the reverse-biased freewheeling diode, so that sufficient energy can be stored in the first capacitive element to compensate the voltage when the switching device is in an on state, or the alternating voltage supply signal does not act on the first capacitive element through the reverse-biased freewheeling diode when the switching device is in an off state.

In an embodiment of the present invention, as shown in fig. 2, an operation control method is provided, which is applied to a driving control circuit, where the driving control circuit is configured to supply a load with a power supply signal input by a power grid system, a first controllable capacitive element is disposed on a bus line of the driving control circuit, the power supply signal is capable of charging the first capacitive element, the first capacitive element is capable of performing voltage compensation on the inverter, the driving control circuit further includes a switching device and a reverse bias freewheeling diode, the first capacitive element is connected in series with the switching device in the bus line, and the switching device is connected in parallel with the reverse bias freewheeling diode, the operation control method includes:

s202, detecting whether the power supply signal increases with time in a process of performing voltage compensation on the inverter by the first capacitive element;

s204, detecting whether the voltage of the bus line is reduced to the power supply signal threshold value or not when the power supply signal is detected to be increased along with time;

s206, when the voltage of the bus line is detected to be reduced to the power supply signal threshold value, the switching device is controlled to be turned off.

In this embodiment, during the process of compensating the voltage of the inverter by using the first capacitive element, if the voltage of the bus line is detected to drop to the threshold value of the power supply signal, the switching device is controlled to be turned off, and the voltage compensation of the inverter by the first capacitive element is stopped, and further, during the process of compensating the voltage of the inverter by using the first capacitive element, whether the power supply signal is increased along with time is detected; and if the power supply signal is detected to be increased along with the time, detecting whether the voltage of the bus line is reduced to the power supply signal threshold value, and further determining whether the first capacitive element performs voltage compensation on the inverter according to the change condition of the power supply signal along with the time so as to realize the voltage compensation on the inverter.

In an embodiment of the present invention, as shown in fig. 3, an operation control method is provided, which is applied to a driving control circuit, where the driving control circuit is configured to supply a power supply signal input by a power grid system to a load, a first controllable capacitive element is disposed on a bus line of the driving control circuit, the power supply signal is capable of charging the first capacitive element, the first capacitive element is capable of performing voltage compensation on the inverter, the driving control circuit further includes a switching device and a reverse bias freewheeling diode, the first capacitive element is connected in series with the switching device in the bus line, and the switching device is connected in parallel with the reverse bias freewheeling diode, the operation control method includes:

s302, detecting the power supply signal and the voltage of the first capacitive element;

s304, comparing the magnitude relation between the power supply signal and the power supply signal threshold value in real time;

and S306, determining that the power supply signal is smaller than or equal to the power supply signal threshold value and the power supply signal is smaller than or equal to the voltage of the first capacitive element, and controlling the first capacitive element to perform voltage compensation on the inverter.

In this embodiment, the step of controlling the first capacitive element to perform voltage compensation on the inverter according to the magnitude relationship between the power supply signal and the power supply signal threshold and the voltage determination of the first capacitive element specifically includes: if the power supply signal is determined to be less than or equal to the power supply signal threshold value and the power supply signal is determined to be less than or equal to the voltage of the first capacitive element, the first capacitive element is controlled to perform voltage compensation on the inverter, the periodic phenomenon that bus voltage is insufficient and power cannot be output in the related technology is avoided, and then beat frequency noise is avoided.

In an embodiment of the present invention, the value of the power supply signal threshold ranges from 10V to 350V.

In an embodiment of the present invention, as shown in fig. 4, before detecting the power supply signal and the voltage of the first capacitive element, the method further includes:

s402, determining the rated power of the load;

s404, determining a corresponding power supply signal threshold value according to the rated power.

Wherein there is a negative correlation between the rated power and the supply signal threshold.

In this embodiment, before the power supply signal and the voltage of the first capacitive element are detected, the rated power of the load is determined, a corresponding power supply signal threshold is determined according to the rated power, the power supply signal threshold is set according to the change of the rated power of the load, and then the first capacitive element is dynamically controlled to perform voltage compensation on the inverter, so that the influence of the fixed power supply signal threshold on the insufficient power supply voltage is reduced, and further beat frequency noise occurs.

In one embodiment of the present invention, as shown in fig. 5 and 7, when the rectifier module input supply signal (amplitude) is less than the supply signal threshold and less than the voltage of the first capacitive element, the switching device is turned on, the first capacitive element discharges the inverter; otherwise, the switching device is turned off. The threshold value of the power supply signal is fixed, and the value range is 10V to 350V.

Fig. 5 is a schematic diagram of a switching device driving signal when the load is too light, and fig. 7 is a schematic diagram of a switching device driving signal when the load is too heavy. According to the control method, when the power supply signal is greater than the voltage of the first capacitive element, the switching device is in an off state, and the electrolytic capacitor is charged through the reverse bias freewheeling diode.

As shown in fig. 6 and 8, when the switching device is turned on, the inverter supply voltage (dc bus voltage) is equal to the first capacitive element voltage; when the switching device is turned off, the inverter supply voltage (dc bus voltage) is equal to the supply signal amplitude.

Further, the supply signal threshold is variable: and detecting the load power, and automatically adjusting the threshold of the power supply signal according to the load power, namely, the larger the load power is, the smaller the threshold of the power supply signal is, so that the direct-current bus voltage at the moment when the switching device is switched from on to off in the process that the amplitude of the power supply signal is in the rising process is equal to the threshold of the power supply signal (namely, the lowest value of the direct-current bus voltage is the largest).

As shown in fig. 9 and 10, the load power is just enough to make the dc bus voltage at the moment when the switching device is switched from on to off during the rising of the supply signal amplitude equal to the supply signal threshold, i.e. to make the lowest value of the dc bus voltage maximum and the fluctuation of the dc bus voltage minimum.

In an embodiment of the second aspect of the present invention, as shown in fig. 11, an operation control device 1 is provided, where the operation control device 1 is provided with a processor 12, and when the processor 12 executes a computer program, the operation control method according to any one of the above embodiments can be implemented, so that the operation control device has the beneficial technical effects of any one of the above operation control methods, and details are not repeated here.

In an embodiment of the third aspect of the present invention, as shown in fig. 12, 13 and 14, a driving control circuit 100 is provided, the driving control circuit being configured to supply a power supply signal input by a power grid system to a load, the driving control circuit being connected to any one of the operation control devices, the driving control circuit 100 including: voltage absorbing deviceA compensation branch comprising a first capacitive element C connected in series₁The switching device is connected between the power grid system and the inverter; switching device and said first capacitive element C₁A series connection, the switching device being configured to control the first capacitive element C₁Is charged or discharged, wherein the first capacitive element C₁The discharging voltage compensates the inverter, which is configured to drive a load to operate.

In this embodiment, the drive control circuit 100 is provided with a voltage novice compensation branch comprising first capacitive elements C connected in series with each other₁And a switching device, under the control of which the first capacitive element C₁Charged to reduce the magnitude of the current of the load, or first capacitive element C₁And discharging to perform voltage compensation on the inverter. In particular, as the first capacitive element C₁The current flows in the charging process as shown in FIG. 13, so that the first capacitive element C₁The current flow during discharge is as shown in fig. 14.

The present invention provides the above-mentioned embodiments by providing the switching device and the first capacitive element C₁The selective absorption of overvoltages or voltage compensation is carried out, the first capacitive element C being arranged in case the supply signal is too high₁The overvoltage signal begins to be absorbed and charging is achieved to reduce the load current peak.

If the supply signal is too low, the first capacitive element C₁Starting discharge to realize voltage compensation, wherein the first capacitive element C₁The cost of the voltage compensation circuit can be reduced without using a capacitor with large capacity, and the first capacitive element C₁Absorbing the over-voltage signal and over-current signal, effectively reducing the peak value of load current, and further passing through the first capacitive element C when the voltage is lower₁And voltage compensation is realized, and system power fluctuation is avoided, so that the problem of beat frequency noise caused by too low input power supply signals is solved.

In particular, the first capacitive element C₁The electrolytic capacitor with the capacitance value ranging from 10uF to 2000uF can be used without selecting a capacitor with a larger capacitance value, so that better cost control can be realized, and the reduction of load electricity is realizedBoth aspects of current peaking and voltage compensation.

In an embodiment of the present invention, further, the inverter is connected between a high voltage bus and a low voltage bus, one end of the switching device is connected to the high voltage bus, and the first capacitive element C is connected to the high voltage bus₁Is connected to the low voltage bus bar.

In this embodiment, the inverter is connected between the high-voltage bus and the low-voltage bus, and converts the dc signal on the bus into an ac signal for driving the load to operate. One end of the switch element is connected to the high-voltage bus, the first capacitive element C₁Is connected to the low voltage bus bar to realize the first capacitive element C₁And controlling charging and discharging.

In an embodiment of the present invention, further, as shown in fig. 12, 13 and 14, the driving control circuit 100 further includes: a controller M connected to the switching device to regulate an on state of the switching device; wherein, if the power supply signal is greater than or equal to a first power supply signal threshold, the controller M triggers the switching device to be turned on in a first mode to control the first capacitive element C₁Charging, and if the controller M detects that the power supply signal is smaller than a second power supply signal threshold, the controller M triggers the switching device to be turned on in a second mode to control the first capacitive element C₁And discharging is performed.

In this embodiment, the controller M controls the conduction mode of the switching device according to the magnitude of the power supply signal. Specifically, when the ac voltage signal exceeds the first voltage threshold, which indicates that the ac voltage is higher, the controller M controls the switching device to be turned on in the first mode to set the first capacitive element C as the first capacitive element C₁Charging, and reducing the amplitude of the load current; when the ac voltage signal is less than the second voltage threshold, which indicates that the ac voltage is too low, the controller M controls the switching device to be turned on in the second mode, so that the first capacitive element C is turned on₁Discharging and carrying out power compensation on the inverter.

In one embodiment of the present invention, further, as shown in fig. 12, 13 and 14, the switching device includes: power tube Q, and the first capacitive element C₁The control end of the power tube Q is connected to the instruction output end of the controller M, the instruction output end outputs a control instruction to the control end, and the control instruction is configured to control the power tube Q to be switched on or switched off; reverse bias freewheeling diode D₁Said reverse biased freewheeling diode D₁Is connected to the drain and source of the power transistor Q, respectively, wherein if the power transistor Q is turned on, the first capacitive element C is turned on₁Discharging to the load through the power tube Q, and if the power tube Q is cut off, the first capacitive element C₁Through the reverse biased freewheeling diode D₁Charging or not.

In this embodiment, the switching device includes a power transistor Q and a reverse-biased freewheeling diode D₁A power transistor Q and a first capacitive element C₁The instruction output end of the controller M is connected to the control end of the power tube Q to send a control instruction to the power tube Q, the power tube Q changes the conduction state (conduction or cut-off) according to the control instruction, and the reverse-biased freewheeling diode D₁Is connected with the drain and source of the power tube Q, respectively, and when the power tube Q is turned on, the first capacitive element C₁Discharging to load via power tube Q to realize voltage compensation, when power tube Q is cut off, the input voltage signal is passed through reverse bias freewheeling diode D₁Is a first capacitive element C₁Charging to reduce load current peak. The first capacitive element C does not need to reduce the load current peak value when the load current peak value is at the normal level₁No action is taken.

Wherein the first capacitive element C₁Through the reverse biased freewheeling diode D₁Charging means that the power supply signal passes through a reverse-biased freewheeling diode D₁For the first capacitive element C₁Charging is carried out while a supply signal supplies power to a load in operation, and a first capacitive element C₁The charging process being a complete charging process, i.e. the first capacitive element C₁During discharge, the first capacitive element C₁The discharge voltage of (2) is greater than the supply voltage on the line, thereby realizing voltage compensation.

Specifically, the power Transistor Q may preferably be an IGBT (Insulated Gate Bipolar Transistor) type power Transistor Q, or may alternatively be a MOSFET (Metal-O)₁ide-Semiconductor Field-Effect Transistor (mosfet), reverse-biased freewheeling diode (D)₁The IGBT and the MOSFET can be independently arranged, and can also be integrally arranged with the IGBT or the MOSFET.

In an embodiment of the present invention, further, as shown in fig. 12, 13 and 14, the driving control circuit 100 further includes: a rectifier module arranged on the first capacitive element C₁And the harmonic filtering module, the rectifying module being configured to convert the supply signal into a direct current signal, wherein the direct current signal is configured to supply the first capacitive element C₁The inverter is configured to control the direct current signal to drive the load to operate.

In this embodiment, the driving control circuit 100 is provided with a rectifying module, and the rectifying module is connected to the first capacitive element C₁The power supply signal input by the power grid system enters the rectification module after noise is filtered by the filtering module, the rectification module rectifies the power supply signal and outputs a direct current signal obtained after rectification to the first capacitive element C₁And a load portion to apply a load to the first capacitive element C₁And charging and providing the load with the electric quantity required by operation.

In an embodiment of the present invention, further, as shown in fig. 12, 13, 14, 15 and 16, if the load includes a single-phase alternating current load, the inverter includes a corresponding single-phase inverter circuit, and the single-phase inverter circuit includes: the two upper bridge arm power devices and the two lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch circuit and the input end of the load, if the load comprises a three-phase alternating current load, the inverter comprises a corresponding three-phase inverter circuit, and the three-phase inverter circuit comprises: and the three upper bridge arm power devices and the three lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch and the input end of the load, wherein the upper bridge arm power device of one phase is connected with the lower bridge arm power device of a corresponding phase in series, and the upper bridge arm power device and the lower bridge arm power device of the same phase are not conducted at the same time.

In this embodiment, if the load includes a single-phase ac load, a corresponding single-phase inverter circuit is provided in the inverter to output a corresponding drive signal to the single-phase ac load. Specifically, the single-phase ac load may be a single-phase motor, or may be a single-phase inductive load.

Wherein, the single-phase inverter circuit comprises two upper bridge arm power devices and two lower bridge arm power devices, and is connected with the first capacitive element C₁Between the output section of the load and the input of the load.

Specifically, when the power supply signal exceeds the first power supply signal threshold, which indicates that the power supply signal is high, as shown in fig. 16, the controller M controls the switching device to be turned on in the first mode to provide the first capacitive element C₁Charging, when the power supply signal is smaller than the second power supply signal threshold, which indicates that the power supply signal is too low, as shown in fig. 17, the controller M controls the switching device to be turned on in the second mode, so as to enable the first capacitive element C to be turned on₁And discharging to perform voltage compensation on the single-phase alternating current load.

Wherein, the three-phase inverter circuit comprises three upper bridge arm power devices and three lower bridge arm power devices, and is connected with the first capacitive element C₁Between the output section of the load and the input of the load. The upper bridge arm power device of each phase is connected with the lower bridge arm power device of the corresponding phase in series, and the upper bridge arm power device and the lower bridge arm power device of the same phase are not conducted at the same timeAnd outputting a one-phase driving signal to the load of the three-phase alternating current load, alternately conducting the upper bridge arm power device and the lower bridge arm power device of the three phases, and outputting a three-phase driving signal to the load of the three-phase alternating current load.

In an embodiment of the present invention, as shown in fig. 12, 13, 14, 15, and 16, a reverse bias freewheeling diode, which is referred to as an upper arm reverse bias freewheeling diode, is connected between the source and the drain of any one of the upper arm power devices, and a reverse bias freewheeling diode, which is referred to as a lower arm reverse bias freewheeling diode, is connected between the source and the drain of any one of the lower arm power devices.

In this embodiment, a reverse bias freewheeling diode, specifically, an upper arm reverse bias freewheeling diode and a lower arm reverse bias freewheeling diode, is indirectly arranged between the source and the drain of the upper arm power device and the lower arm power device, in each phase, the upper arm power device and the lower arm reverse bias freewheeling diode of the corresponding phase form a conduction line, and the lower arm power device and the upper arm reverse bias freewheeling diode of the corresponding phase form a conduction line.

In an embodiment of the present invention, further, any one of the upper bridge arm power devices includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, and any one of the lower bridge arm power devices includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, where a collector of the insulated gate bipolar transistor is connected as the drain, and an emitter of the insulated gate bipolar transistor is connected as the source.

In this embodiment, the upper arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and/or an insulated gate bipolar transistor (i.e., IGBT), and when an insulated gate bipolar transistor is used, the collector of the insulated gate bipolar transistor is connected as the drain and the emitter of the insulated gate bipolar transistor is connected as the source. The lower arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and/or an insulated gate bipolar transistor (i.e., IGBT), and when the insulated gate bipolar transistor is used, a collector of the insulated gate bipolar transistor is connected as the drain, and an emitter of the insulated gate bipolar transistor is connected as the source.

In an embodiment of the present invention, further, the power transistor Q includes a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor, wherein a gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal of the controller M as the control terminal, and a base of the insulated gate bipolar transistor is connected to the command output terminal of the controller M as the control terminal.

In this embodiment, the power transistor Q includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and/or an insulated gate bipolar transistor (i.e., IGBT), wherein a gate of the MOSFET is used as a control terminal, a command output terminal of the controller M is connected to the gate of the MOSFET, the MOSFET of the IGBT is used as a control terminal, and a command output terminal of the controller M is connected to a base of the IGBT.

In an embodiment of the present invention, as shown in fig. 15, 16 and 17, the driving control circuit 100 for the single-phase ac load includes a rectifying circuit, a power switching tube, a power diode, an electrolytic capacitor, a single-phase inverter circuit, and a single-phase ac load.

The single-phase power supply signal source is converted into direct-current voltage through the rectifying circuit, the power switch tube is connected with the power diode in parallel, an emitting electrode (or a source electrode) of the power switch tube and a negative electrode of the power diode are connected with a direct-current voltage positive end, a collecting electrode (or a drain electrode) of the power switch tube and a positive electrode of the power diode are connected with an electrolytic capacitor positive end, a negative electrode of the electrolytic capacitor is connected with a direct-current voltage negative end, and the direct-current voltage supplies power to the single-phase inverter circuit to drive the single-.

Alternatively, the single-phase inverter circuit may be composed of 4 IGBTs or 4 MOSFETs while having an anti-parallel freewheeling diode.

Alternatively, the single-phase ac load may be a single-phase motor, or may be a single-phase inductive load.

In an embodiment of the invention, further, the load of the load comprises a fan and/or a compressor.

In one embodiment of the invention, further, the load of the load comprises an induction motor and/or a permanent magnet synchronous motor.

In an embodiment of the invention, further, said first capacitive element C₁Comprising an electrolytic capacitor, and/or said first capacitive element C₁Comprising a capacitive element, and/or said first capacitive element C₁Comprising a plurality of capacitive elements connected in series and/or in parallel.

In this embodiment, the first capacitive element C₁The first capacitive element C can be realized by using a single electrolytic capacitor, or by using a plurality of electrolytic capacitors connected in series and/or in parallel₁And (4) freely setting the equivalent capacitance value.

In an embodiment of the invention, further, said first capacitive element C₁The value range of the capacity value is 10uF to 2000 uF.

Optionally, a first capacitive element C₁Has a capacity value of 82 uF.

Optionally, a first capacitive element C₁Has a capacity value of 220 uF.

Optionally, a first capacitive element C₁Has a capacity value of 470 uF.

Optionally, a first capacitive element C₁Has a capacity of 560 uF.

Optionally, a first capacitive element C₁Has a capacity value of 680 uF.

Optionally, a first capacitive element C₁Has a capacity value of 820 uF.

In an embodiment of the present invention, as shown in fig. 18, fig. 19, fig. 20, fig. 21, and fig. 22, the power supply of the controller M includes an isolation power supply or a bootstrap power supply, where the bootstrap power supply includes a bootstrap power supply circuit DC in the inverter, a bootstrap diode, and a bootstrap capacitor, an anode of the bootstrap diode is connected to an anode of the bootstrap power supply circuit, a cathode of the bootstrap diode is connected to a cathode of the bootstrap capacitor, and an anode of the bootstrap capacitor is connected to the power supply terminal of the controller M.

In this embodiment, the controller M is provided with a power supplyThe power supply comprises an isolation power supply or a bootstrap power supply, when the power supply is the isolation power supply, the isolation power supply is connected to a power supply end of the controller M to provide electric energy for the controller M, and when the power supply is the bootstrap power supply, the bootstrap power supply comprises a bootstrap power supply circuit DC and a bootstrap diode D which are connected in series₂And a bootstrap capacitor C₂The negative pole of the bootstrap power supply circuit DC is connected with the low-voltage bus in the bus line, and the positive pole of the bootstrap power supply circuit DC is connected with the bootstrap diode D₂Is connected with the positive pole of the diode D, and a bootstrap diode D₂Negative electrode of and bootstrap capacitor C₂Is connected with the positive pole of a bootstrap capacitor C₂Is connected to the power supply terminal of the controller M to supply power to the controller M.

Alternatively, as shown in fig. 18, 19, 20 and 21, the load is a three-phase load, and the switching power supply unit includes a controller M and a power supply, where the power supply is a bootstrap power supply.

Wherein optionally, as shown in FIG. 19, a bootstrap diode D₂Is set to one.

Wherein optionally, as shown in FIG. 20, a bootstrap diode D₂Two are provided.

Wherein, alternatively, as shown in fig. 21, the bootstrap diodes D2 are provided in three.

A plurality of bootstrap diodes D₂The reliability of the drive control circuit can be improved.

Alternatively, as shown in fig. 18 and 22, the load is a three-phase load, and the switching power supply unit includes the controller M and a power supply source, wherein the power supply source is an isolated power supply.

Alternatively, as shown in fig. 23, 24 and 25, the load is a single-phase load, and the switching power supply unit includes the controller M and a power supply, where the power supply is a bootstrap power supply.

Wherein optionally, as shown in FIG. 24, a bootstrap diode D₂Is set to one.

Wherein optionally, as shown in FIG. 25, a bootstrap diode D₂Two are provided.

Two bootstrap diodes D₂Can improve the drive control powerThe reliability of the way.

Alternatively, as shown in fig. 23 and 26, the load is a single-phase load, and the switching power supply unit includes the controller M and a power supply, where the power supply is a bootstrap power supply.

In one embodiment of the present invention, as shown in fig. 27, the driving control circuit includes an inductor L, a second capacitive element C₃Rectifier module, switching device Q, reverse bias freewheeling diode D₁A first capacitive element C₁An inverter and a load. The power supply signal source passes through an inductor L and a second capacitive element C₃After filtering, converting the filtered signal into a direct current threshold value through a rectifying module; switching device Q and reverse bias freewheeling diode D₁Parallel connection, emitter (or source) of switching device Q, reverse biased freewheeling diode D₁Is connected with the positive end of the direct current threshold, the collector (or drain) of the switching device Q, and the reverse bias freewheeling diode D₁Positive electrode of and the first capacitive element C₁Positive electrode connection, first capacitive element C₁The negative electrode is connected with the negative end of the direct current threshold; the DC threshold value supplies power to the inverter to drive the three-phase AC load. Alternatively, the inverter may be composed of 6 IGBTs, or 6 MOSFETs, or employ an Intelligent Power Module (IPM). Optionally, the load is a three-phase ac load, and may be an induction motor, or a permanent magnet synchronous motor.

In one embodiment of the present invention, as shown in fig. 28, the driving control circuit includes an inductor L, a second capacitive element C₃Rectifier module, switching device Q, reverse bias freewheeling diode D₁A first capacitive element C₁An inverter and a load. The power supply signal source passes through an inductor L and a second capacitive element C₃After filtering, converting the filtered signal into a direct current threshold value through a rectifying module; switching device Q and reverse bias freewheeling diode D₁Parallel connection, emitter (or source) of switching device Q, reverse biased freewheeling diode D₁Is connected with the positive end of the direct current threshold, the collector (or drain) of the switching device Q, and the reverse bias freewheeling diode D₁Positive electrode of and the first capacitive element C₁Positive electrode connection, first capacitive element C₁The negative electrode is connected with the negative end of the direct current threshold;the direct current threshold value supplies power to the inverter to drive the single-phase alternating current load. Alternatively, the inverter may be composed of 4 IGBTs or 4 MOSFETs. Alternatively, the load is a single-phase alternating current load, and may be a single-phase motor or a single-phase inductive load.

As shown in fig. 29 to fig. 40, in any of the above technical solutions, further, the voltage absorption compensation branch further includes: and said first capacitive element C₁Series-connected resistive and/or inductive elements L₀The resistance element is used for regulating the current flowing through the first capacitive element C₁The current of the inductance element L₀For filtering the current flowing through the first capacitive element C₁The alternating current noise of (1).

In this embodiment, the resistive and/or inductive element L₀Can be connected between the high-voltage bus and the switch device, and can also be connected to the first capacitive element C₁And the low-voltage bus, and can also be connected between the switching device and the first capacitive element C₁In the meantime.

In addition, the resistive element may comprise a resistor, or a plurality of resistors connected in series and/or in parallel, and, similarly, the inductive element L₀Including an inductor, or a plurality of inductors connected in series and/or in parallel.

In any of the above technical solutions, further, a value range of the resistance element is 0.1m Ω to 10 Ω, and the inductance element L is₀The value range of (A) is 1 uH-10 mH.

In addition, as shown in fig. 29 to fig. 40, the driving control circuit 100 may be provided with only one filter inductor L to eliminate the harmonic signal, and specifically includes the following two embodiments:

(1) the filter inductor L is further provided with an inductive element, the inductive element is connected in series to at least one ac line (as shown in fig. 29 and 30, and in fig. 35 and 36) of the ac detection in the driving control circuit, and the inductive element is the filter inductor L, and noise in the power supply signal carried on the ac line is filtered by the filter inductor L.

(2) The filter inductor L is connected in series to the high-voltage bus (as shown in fig. 33 and 34, and as shown in fig. 37 and 38) and/or the low-voltage bus (as shown in fig. 31 and 32, and as shown in fig. 39 and 40), the dc line carries a signal which is the dc signal, and an inductance value range of the inductive element is 200uH to 25 mH.

In this embodiment, the inductive element is connected in series to the voltage bus and/or the low voltage bus of the dc test in the driving control circuit, and the inductive element is a filter inductor L, which filters out noise in the dc signal carried on the dc line.

As shown in fig. 41, in an embodiment of the fourth aspect of the present invention, there is provided a home appliance 300, including: a load 200; as in any of the above embodiments, the driving control circuit 100 is connected between a grid system and a load, and the driving control circuit 100 is configured to control the grid system to supply power to the load 200.

In this embodiment, the home appliance includes the driving control circuit 100 described in any of the above embodiments, so that the home appliance includes all the beneficial effects of the driving control circuit 100 described in any of the above embodiments, and details are not repeated again.

In an embodiment of the present invention, further, the home appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer mainframe.

In an embodiment of the fifth aspect of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored, which, when executed, implements the steps of the operation control method according to any one of the above.

In this embodiment, the computer-readable storage medium stores a computer program, and the computer program is executed by the processor to implement the operation control method in any of the above technical solutions, so that the computer-readable storage medium includes all the beneficial effects of the operation control method in any of the above technical solutions, and is not described again.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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. An operation control method for a driving control circuit, wherein the driving control circuit is used for supplying a load with a power supply signal input by a power grid system, a controllable first capacitive element is arranged on a bus line of the driving control circuit, the power supply signal can charge the first capacitive element, and the first capacitive element can perform voltage compensation on the bus line, and the operation control method comprises the following steps:

determining a rated power of the load;

determining a corresponding power supply signal threshold value according to the rated power,

wherein the rated power and the power supply signal threshold are in negative correlation;

detecting the supply signal and the voltage of the first capacitive element;

comparing the magnitude relation between the power supply signal and a power supply signal threshold value in real time;

determining whether to control the first capacitive element to perform voltage compensation on the inverter according to the magnitude relation and the voltage of the first capacitive element,

wherein the inverter is connected between the first capacitive element and the load, and the inverter is configured to drive the load to operate;

the drive control circuit further comprises a switching device;

detecting whether the power supply signal increases with time during the voltage compensation of the inverter by the first capacitive element;

if the power supply signal is detected to be increased along with the time, detecting whether the voltage of the bus line is reduced to the power supply signal threshold value;

if the voltage of the bus line is detected to be reduced to the power supply signal threshold value, controlling the switching device to be switched off;

determining whether to control the first capacitive element to perform voltage compensation on the inverter according to the magnitude relation and the voltage of the first capacitive element, specifically including:

and if the power supply signal is determined to be less than or equal to the power supply signal threshold value and the power supply signal is determined to be less than or equal to the voltage of the first capacitive element, controlling the first capacitive element to perform voltage compensation on the inverter.

2. The operation control method according to claim 1,

the drive control circuit further comprises a reverse-biased freewheeling diode, the first capacitive element and a switching device are connected in series in the busbar line, the switching device and the reverse-biased freewheeling diode are connected in parallel,

if the switching device is conducted, the first capacitive element performs voltage compensation on the inverter through the switching device;

if the switching device is turned off, the power supply signal charges or does not act on the first capacitive element through the reverse bias freewheeling diode.

3. The operation control method according to claim 1 or 2,

the value range of the power supply signal threshold is 10V-350V.

4. An operation control device provided with a processor, characterized in that the processor, when executing a computer program, is capable of implementing an operation control method according to any one of claims 1 to 3.

5. A drive control circuit for supplying a load with a power supply signal inputted from a grid system, the drive control circuit being connected to the operation control device according to claim 4, the drive control circuit comprising:

the voltage absorption compensation branch circuit comprises a first capacitive element and a switching device which are connected in series and is connected between the power grid system and the inverter;

the switching device is connected in series with the first capacitive element, the switching device being configured to control the first capacitive element to be charged or discharged,

wherein the first capacitive element discharge voltage compensates the inverter, the inverter configured to drive a load to operate;

the power supply for the controller comprises an isolated power supply or a bootstrap power supply,

the bootstrap power supply comprises a bootstrap power supply circuit, a bootstrap diode and a bootstrap capacitor in the inverter, wherein an anode of the bootstrap diode is connected to an anode of the bootstrap power supply circuit, a cathode of the bootstrap diode is connected to an anode of the bootstrap capacitor, and an anode of the bootstrap capacitor is connected to a power supply end of the controller.

6. The drive control circuit according to claim 5,

the inverter is connected between a high-voltage bus and a low-voltage bus, one end of the switching device is connected to the high-voltage bus, and one end of the first capacitive element is connected to the low-voltage bus.

7. The drive control circuit according to claim 5,

a controller connected to the switching device to regulate an on state of the switching device;

wherein if the power supply signal is greater than or equal to a first power supply signal threshold, the controller triggers the switching device to conduct in a first mode to control the first capacitive element to charge,

in addition, if the controller detects that the power supply signal is smaller than a second power supply signal threshold value, the controller triggers the switching device to be conducted in a second mode so as to control the first capacitive element to discharge.

8. The drive control circuit according to claim 7, wherein the switching device comprises:

a power tube connected in series with the first capacitive element, wherein a control end of the power tube is connected to a command output end of the controller, the command output end outputs a control command to the control end, and the control command is configured to control the power tube to be switched on or switched off;

a reverse-biased freewheeling diode, both ends of the reverse-biased freewheeling diode are respectively connected to the drain electrode and the source electrode of the power tube,

if the power tube is conducted, the first capacitive element discharges to the load through the power tube, and if the power tube is cut off, the first capacitive element is charged or does not act through the reverse bias freewheeling diode.

9. The drive control circuit according to claim 5, characterized by further comprising:

a rectifying module disposed between the input of the first capacitive element and the power grid system, the rectifying module configured to convert the supply signal into a direct current signal,

wherein the dc signal is configured to charge the first capacitive element and provide an amount of power required for the operation of the load, and the inverter is configured to control the dc signal to drive the operation of the load.

10. The drive control circuit according to claim 8,

if the load comprises a single-phase alternating current load, the inverter comprises a corresponding single-phase inverter circuit, and the single-phase inverter circuit comprises:

two upper bridge arm power devices and two lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch circuit and the input end of the load,

if the load comprises a three-phase alternating current load, the inverter comprises a corresponding three-phase inverter circuit, and the three-phase inverter circuit comprises:

three upper bridge arm power devices and three lower bridge arm power devices are connected between the output end of the voltage absorption compensation branch circuit and the input end of the load,

the upper bridge arm power device of one phase is connected with the lower bridge arm power device of a corresponding phase in series, and the upper bridge arm power device and the lower bridge arm power device of the same phase are not conducted at the same time.

11. The drive control circuit according to claim 10,

a reverse bias freewheeling diode is connected between the source and the drain of any one of the upper bridge arm power devices and is marked as an upper bridge arm reverse bias freewheeling diode,

and a reverse bias freewheeling diode is connected between the source electrode and the drain electrode of any lower bridge arm power device and is called as a lower bridge arm reverse bias freewheeling diode.

12. The drive control circuit according to claim 10,

any one of the upper bridge arm power devices comprises a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor,

any one of the lower bridge arm power devices comprises a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor,

and the collector of the insulated gate bipolar transistor is used as the drain to be connected, and the emitter of the insulated gate bipolar transistor is used as the source to be connected.

13. The drive control circuit according to claim 10,

the power tube comprises a metal oxide semiconductor field effect transistor and/or an insulated gate bipolar transistor,

the grid electrode of the metal oxide semiconductor field effect transistor is used as the control end and connected to the instruction output end of the controller, and the base electrode of the insulated gate bipolar transistor is used as the control end and connected to the instruction output end of the controller.

14. The drive control circuit according to any one of claims 5 to 13,

the load of the load comprises a fan and/or a compressor,

or the load of the load comprises an induction motor and/or a permanent magnet synchronous motor.

15. The drive control circuit according to any one of claims 5 to 13,

the first capacitive element comprises an electrolytic capacitor, and/or the first capacitive element comprises one capacitive element, and/or the first capacitive element comprises a plurality of capacitive elements connected in series and/or in parallel.

16. The drive control circuit according to any one of claims 5 to 13,

the value range of the capacity value of the first capacitive element is 10 uF-2000 uF.

17. The drive control circuit according to any one of claims 5 to 13, wherein the voltage absorption compensation branch further comprises:

the resistance element is used for adjusting the current flowing through the first capacitive element, and the inductance element is used for filtering alternating current noise flowing through the first capacitive element.

18. The drive control circuit of claim 17,

the value range of the resistance element is 0.1-10 omega, and the value range of the inductance element is 1 uH-10 mH.

19. An appliance, comprising:

a load;

the drive control circuit according to any one of claims 5 to 18, interposed between a grid system and a load, the drive control circuit being configured to control the grid system to supply power to the load.

20. The home device of claim 19,

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.

21. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the operation control method according to any one of claims 1 to 3.