Drive control circuits and home appliances

Abstract

The present invention provides a driving control circuit and household appliance, wherein the circuit includes: a voltage absorption compensation branch connected between a rectifier module and an inverter, including: a first switch device and a first capacitive element connected in series, the first switch device is configured to control the first capacitive element to charge or discharge, the first capacitive element discharges to perform voltage compensation on the inverter, the power supply of the driving chip of the first switching device is an isolated power supply or a bootstrap power supply, the bootstrap power supply includes a bootstrap power supply circuit of the inverter, a secondary bootstrap diode of the switching device and a secondary bootstrap capacitor, the anode of the secondary bootstrap diode is connected to the positive electrode of the bootstrap power supply circuit of the inverter, the negative electrode of the secondary bootstrap diode is connected to the positive electrode of the secondary bootstrap capacitor, and the positive electrode of the secondary bootstrap capacitor is connected to the power supply end of the driving chip of the first switching device. Through the technical solution of the present invention, the beat frequency noise in the circuit is reduced, and the modification cost of the driving control circuit is also reduced.

Description

Technical Field

[0001] The present invention relates to the field of drive control technology, and in particular to a drive control circuit and a household appliance. Background Art

[0002] Generally speaking, the power factor of a passive PFC (Power Factor Correction) circuit is very low and requires the use of a large-capacity capacitor, resulting in a high cost of the passive PFC circuit.

[0003] As for the general circuit method without electrolytic capacitors, since an independent isolated power supply needs to be provided for the driving chip, there is usually a disadvantage of high circuit cost.

[0004] Therefore, there is an urgent need for a drive control circuit that can solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To this end, a first aspect of the present invention provides a drive control circuit.

[0007] A second aspect of the present invention provides a household appliance.

[0008] In view of this, a first aspect of the present invention provides a drive control circuit, comprising: a voltage absorption compensation branch, connected to the bus line between the rectifier module and the inverter, the voltage absorption compensation branch comprising: a first switching device and a first capacitive element connected in series, the first switching device being configured to control the first capacitive element to charge or discharge, the first capacitive element discharging to perform voltage compensation on the inverter, wherein the first switching device is controlled by a driving chip, the power supply of the driving chip is an isolated power supply or a bootstrap power supply, wherein the bootstrap power supply comprises a bootstrap power supply circuit of the inverter, a secondary bootstrap diode of the switching device and a secondary bootstrap capacitor, the anode of the secondary bootstrap diode is connected to the positive electrode of the bootstrap power supply circuit of the inverter, the negative electrode of the secondary bootstrap diode is connected to the positive electrode of the secondary bootstrap capacitor, and the positive electrode of the secondary bootstrap capacitor is connected to the power supply end of the driving chip of the first switching device.

[0009] In this technical solution, the drive control circuit is connected to the power supply signal, which is converted into a DC signal through the rectifier module. The inverter controls the DC signal to power the load. When the power supply signal is low, beat frequency noise will be generated. Therefore, by setting a voltage absorption compensation circuit, when the power supply signal is low, the voltage absorption compensation circuit can perform voltage compensation on the inverter, thereby effectively reducing the beat frequency noise and improving the reliability of the drive control circuit and the stability of the inverter.

[0010] In addition, the charging or discharging of the first capacitive element is controlled by the conduction state of the switching device, and the switching device is controlled by the driving chip. Therefore, by setting a bootstrap power supply including a bootstrap power supply circuit in the inverter, a secondary bootstrap diode (not belonging to the inverter) and a secondary bootstrap capacitor (not belonging to the inverter), not only a reliable power supply is provided for the driving chip, but also the design cost of the driving control circuit is simplified.

[0011] In this technical solution, a DC source is provided in the inverter, and the DC source is used to provide the voltage required for the operation of the upper bridge arm power device and the lower bridge arm power device, wherein the upper bridge arm power device and the lower bridge arm power device are controlled by a driving chip, which are respectively recorded as a first driving chip and a second driving chip, and the power supply end of the second driving chip is directly connected to the positive electrode of the DC source, the positive electrode of the DC source DC is connected to the anode of a primary bootstrap diode (inside the inverter), and the cathode of the primary bootstrap diode (inside the inverter) is connected to the positive electrode of a primary bootstrap capacitor (inside the inverter). At the same time, the positive electrode of the primary bootstrap capacitor (inside the inverter) is also connected to the power supply end of the first driving chip, wherein the bootstrap power supply circuit includes the DC source DC inside the inverter, the primary bootstrap diode and the primary bootstrap capacitor, that is, the bootstrap power supply is mainly based on the bootstrap power supply circuit (primary bootstrap) inside the inverter, and the secondary bootstrap diode and the secondary bootstrap capacitor perform secondary bootstrap on the basis of the primary bootstrap diode to provide a voltage signal for the operation of the driving chip.

[0012] Among them, the commonly used specifications of the above DC sources are 5V, 12V and 24V.

[0013] In addition, the above-mentioned isolated power supply mainly supplies power to the driver chip based on a transformer.

[0014] In addition, the driving control circuit in the above technical solution provided by the present invention may also have the following additional technical features:

[0015] In the above technical solution, further, the bus line includes a high-voltage bus and a low-voltage bus, and the inverter includes: an upper bridge arm power device and a lower bridge arm power device connected in series, bridged between the high-voltage bus and the low-voltage bus, a reverse-biased freewheeling diode is provided between the source and the drain of the upper bridge arm power device, recorded as a first reverse-biased freewheeling diode, and a reverse-biased freewheeling diode is provided between the source and the drain of the lower bridge arm power device, recorded as a second reverse-biased freewheeling diode, wherein the upper bridge arm power device and the lower bridge arm power device of the same phase are not turned on at the same time.

[0016] In this technical solution, the upper arm power device and the lower arm power device are core components of the inverter. Whether they can be reliably turned on or off depends not only on the driver chip, but also on whether the power supply signal is normal. In particular, when the power supply signal is low, it may cause abnormal opening of the power device of the inverter, and then cause beat frequency noise, which not only affects the reliability of the compressor operation, but is also the main reason for the beat frequency noise in household appliances. Therefore, by setting a voltage absorption compensation branch at the input stage of the inverter, the inverter can be effectively compensated for voltage, thereby reducing beat frequency noise and abnormal noise, so as to enhance the user experience.

[0017] In any of the above technical solutions, further, the inverter is configured to control the process of the power supply signal supplying power to the load. If the load is a single-phase load, the inverter includes two-phase upper bridge arm power devices and lower bridge arm power devices. If the load is a three-phase load, the inverter includes three-phase upper bridge arm power devices and lower bridge arm power devices.

[0018] In any of the above technical solutions, further, the inverter is configured to control the process of the power supply signal supplying power to the load. If the load is a single-phase load, the inverter includes two-phase upper bridge arm power devices and lower bridge arm power devices. If the load is a three-phase load, the inverter includes three-phase upper bridge arm power devices and lower bridge arm power devices.

[0019] In any of the above technical solutions, it further includes: if the power supply signal is greater than or equal to the first power supply signal threshold, the driver chip triggers the first switch device to turn on in the first mode to control the first capacitive element to charge; if the driver chip detects that the power supply signal is less than the second power supply signal threshold, the driver chip triggers the first switch device to turn on in the second mode to control the first capacitive element to discharge.

[0020] The first power supply signal threshold and the second power supply signal threshold may take 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.

[0021] In this technical solution, the collected power supply signal is compared with a preset power supply signal threshold. When the power supply signal exceeds the first power supply signal threshold, it means that the power supply signal is high. At this time, the driver chip controls the switch device to be turned on in the first mode to charge the first capacitive element or keep the first capacitive element inactive. When the power supply signal is less than the second power supply signal threshold, it means that the power supply signal is too low. At this time, the driver chip controls the switch device to be turned on in the second mode to discharge the first capacitive element, thereby achieving voltage compensation and avoiding system power fluctuations, thereby solving the beat frequency noise problem caused by the input power supply signal being too low.

[0022] In any of the above technical solutions, further, the first switching device includes: a power tube, which is connected in series with the first switching device, and the control end of the power tube is connected to the instruction output end of the driving chip, and the instruction output end outputs a control instruction to the control end, and the control instruction is configured to control the power tube to be turned on or off; a third reverse-biased freewheeling diode, and the two ends of the third reverse-biased freewheeling diode are respectively connected to the drain and source of the power tube, wherein, if the power tube is turned on, the first capacitive element discharges to the load through the power tube, and if the power tube is turned off, the first capacitive element is charged through the third reverse-biased freewheeling diode.

[0023] In this technical solution, the switch device includes a power tube and a third reverse-biased freewheeling diode. The power tube is connected in series with the first capacitive element. The command output end of the driver chip is connected to the control end of the power tube to send a control command to the power tube, and the power tube changes the conduction state (on or off) according to the control command. The two ends of the third reverse-biased freewheeling diode are respectively connected to the drain and source of the power tube. When the power tube is turned on, the first capacitive element discharges to the load through the power tube to achieve voltage compensation for the inverter. When the power tube is turned off, the input voltage signal charges the first capacitive element through the third reverse-biased freewheeling diode to reduce the load current peak.

[0024] Among them, the first capacitive element is charged through the third reverse biased freewheeling diode, which means that the power supply signal charges the first capacitive element through the third reverse biased freewheeling diode, and at the same time, the power supply signal supplies power to the running load, the DC signal can charge the first capacitive element, or the first capacitive element is not in action during the complete charging process, that is, when the first capacitive element is discharged, the discharge voltage of the first capacitive element is greater than the power supply voltage on the line, thereby realizing voltage compensation for the inverter.

[0025] Specifically, the power tube can preferably use an IGBT (Insulated Gate Bipolar Transistor) type power tube, or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The reverse-biased freewheeling diode can be set independently or integrated with the IGBT or MOSFET.

[0026] In any of the above technical solutions, further, the drive control circuit also includes: a harmonic filtering module, which is arranged at the input end of the inverter, and the harmonic filtering module is configured to filter out the harmonic signal in the power supply signal.

[0027] In this technical solution, by arranging the harmonic filtering module at the input end of the inverter, the power supply signal input from the power grid system is filtered to reduce the interference of the harmonic signal on the inverter, which is beneficial to improving the reliability and beat frequency noise of the inverter.

[0028] In any of the above technical solutions, further, the harmonic filtering module includes a second capacitive element, the second capacitive element is connected across two AC lines in the drive control circuit, and the signal carried by the AC line is an AC signal.

[0029] In this technical solution, the harmonic filtering module includes a second capacitive element connected across two AC lines on the AC side of the drive control circuit. Specifically, the capacitive element is a filter capacitor, which filters out clutter in the AC signal carried on the AC line.

[0030] In any of the above technical solutions, further, the second capacitive element includes a capacitor element, and / or the first capacitive element includes a plurality of capacitor elements connected in series and / or in parallel, wherein the capacitance of the second capacitive element ranges from 1uF to 100uF.

[0031] Optionally, the capacitance of the second capacitive element ranges from 10uF to 20uF.

[0032] In any of the above technical solutions, further, the harmonic filtering module also includes an inductive element, which is connected in series to at least one AC line in the drive control circuit, and the signal carried by the AC line is an AC signal, wherein the inductance value range of the inductive element is 200uH~25mH.

[0033] In this technical solution, the harmonic filtering module is also provided with an inductive element, which is connected in series to at least one AC line of the AC measurement in the drive control circuit. The inductive element is a filter inductor, and the noise in the AC signal carried by the AC line is filtered out by the filter inductor.

[0034] Optionally, the inductance of the inductive element ranges from 200uH to 25mH.

[0035] Optionally, the inductance of the inductive element is 500uH.

[0036] Optionally, the inductance of the inductive element is 5 mH.

[0037] In any of the above technical solutions, further, the harmonic filtering module also includes an inductive element, and the harmonic filtering module also includes an inductive element, and the inductive element is connected in series to the high-voltage bus and / or the low-voltage bus, wherein the inductance value range of the inductive element is 200uH~25mH.

[0038] In this technical solution, the inductive element is connected in series to at least one DC line of the DC measurement in the drive control circuit. The inductive element is a filter inductor, and the noise in the DC power supply signal carried by the DC line is filtered out by the filter inductor.

[0039] Optionally, the inductance of the inductive element ranges from 200uH to 25mH.

[0040] Optionally, the inductance of the inductive element is 500uH.

[0041] Optionally, the inductance of the inductive element is 5 mH.

[0042] In any of the above technical solutions, further, the drive control circuit also includes: a rectifier module, which is arranged between the input end of the first capacitive element and the power grid system, and the rectifier module is configured to convert the AC signal into a DC signal, wherein the DC signal is configured to charge the first capacitive element and provide the power required for the operation of the load.

[0043] In this technical solution, a rectifier module is provided in the drive control circuit, and the rectifier module is connected between the input end of the first capacitive element and the power grid system. The power supply signal includes an AC signal and a DC signal, wherein the AC signal input by the power grid system enters the rectifier module, the rectifier module rectifies the AC signal, and outputs the DC signal obtained after rectification to the first capacitive element and the load part, so as to charge the first capacitive element or keep the first capacitive element inactive, and provide the load with the power required for operation.

[0044] In any of the above technical solutions, further, the drive control circuit also includes: a third capacitive element and a second switching device connected in series, connected between the high-voltage bus and the low-voltage bus; a fourth reverse-biased freewheeling diode, wherein both ends of the fourth reverse-biased freewheeling diode are respectively connected to the drain and source of the second switching device, wherein the first switching device is turned on and the second switching device is turned on alternately.

[0045] In any of the above technical solutions, the drive control circuit also includes a third capacitive element and a second switch device connected in series between the high-voltage bus and the low-voltage bus, and a fourth reverse-biased freewheeling diode whose two ends are respectively connected to the drain and source of the second switch device. The second switch device changes its conduction state under the control of the drive chip, and the first switch device is turned on and the second switch device is turned on alternately. When the first switch device is turned on, the first capacitive element discharges to achieve voltage compensation, which is beneficial to overcome problems such as system power fluctuations and beat frequency noise. At the same time, the second switch device is cut off, and the discharge current of the first capacitive element does not flow through the third capacitive capacitor, thereby avoiding the occurrence of excessive charging current of the third capacitive element (usually a thin film capacitor), further improving the reliability of the drive control circuit.

[0046] In addition, when the first switching device is turned off and the second switching device is turned on, the third capacitive element can filter out the harmonic signal in the DC signal, which is beneficial to further overcome problems such as system power fluctuations and beat frequency noise. At this time, the DC signal can charge the first capacitive element, or the first capacitive element does not operate, further improving the stability of the drive control circuit.

[0047] Optionally, the second switching device is a power switch tube or a resistive element.

[0048] In any of the above technical solutions, further, any of the upper bridge arm power devices includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein 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.

[0049] 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). When an insulated gate bipolar transistor is used, the collector of the insulated gate bipolar transistor is connected as the drain and the emitter is connected as the source.

[0050] In any of the above technical solutions, further, any of the lower bridge arm power devices includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein 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.

[0051] In this technical solution, the lower bridge arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and / or an insulated gate bipolar transistor (i.e., IGBT). When an insulated gate bipolar transistor is used, the collector of the insulated gate bipolar transistor is connected as the drain and the emitter is connected as the source.

[0052] In any of the above technical solutions, further, the power tube includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein the gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal of the driving chip as the control terminal, and the base of the insulated gate bipolar transistor is connected to the command output terminal of the driving chip as the control terminal.

[0053] In this technical solution, the power tube includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and / or an insulated gate bipolar transistor (i.e., IGBT), wherein the gate of the MOSFET serves as a control terminal, the command output terminal of the driver chip is connected to the gate of the MOSFET, the MOSFET of the IGBT serves as a control terminal, and the command output terminal of the driver chip is connected to the base of the IGBT.

[0054] In any of the above technical solutions, further, the load includes a fan and / or a compressor.

[0055] In any of the above technical solutions, further, the load includes an induction motor and / or a permanent magnet synchronous motor.

[0056] In any of the above technical solutions, further, the first capacitive element includes an electrolytic capacitor, and / or the first capacitive element includes a capacitive element, and / or the first capacitive element includes a plurality of capacitive elements connected in series and / or in parallel.

[0057] In any of the above technical solutions, further, the capacitance value of the first capacitive element ranges from 10uF to 2000uF.

[0058] Optionally, the capacitance of the first capacitive element is 82uF.

[0059] Optionally, the capacitance of the first capacitive element is 220uF.

[0060] Optionally, the capacitance of the first capacitive element is 470uF.

[0061] Optionally, the capacitance of the first capacitive element is 560uF.

[0062] Optionally, the capacitance of the first capacitive element is 680uF.

[0063] Optionally, the capacitance of the first capacitive element is 820uF.

[0064] In any of the above technical solutions, further, the voltage absorption compensation branch also includes: a resistor element and / or an inductor element connected in series with the first capacitive element, the resistor element is used to adjust the current flowing through the first capacitive element, and the inductor element is used to filter out AC noise flowing through the first capacitive element.

[0065] In this technical solution, the resistance element and / or the inductance element can be connected between the high-voltage bus and the switch device, between the first capacitive element and the low-voltage bus, or between the switch device and the first capacitive element.

[0066] In addition, the resistance element includes one resistor, or multiple resistors connected in series and / or in parallel. Similarly, the inductance element includes one inductance, or multiple inductors connected in series and / or in parallel.

[0067] In any of the above technical solutions, further, the resistance element has a value range of 0.1 mΩ to 10 Ω, and the inductance element has a value range of 1 uH to 10 mH.

[0068] The second aspect of the present invention provides a household appliance, comprising: a load; a drive control circuit as described in any of the above technical solutions, wherein the drive control circuit is connected between the power grid system and the load, and the drive control circuit is configured to control the power grid system to supply power to the load.

[0069] In this technical solution, the household appliance includes the driving control circuit as described in any of the above technical solutions. Therefore, all the beneficial effects of the household appliance including the driving control circuit as described in any of the above technical solutions will not be repeated again.

[0070] In the above technical solution, further, the household electrical appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner and a computer host. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0072] Figure 1A schematic diagram of a drive control circuit according to an embodiment of the present invention is shown;

[0073] Figure 2 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0074] Figure 3 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0075] Figure 4 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0076] Figure 5 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0077] Figure 6 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0078] Figure 7 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0079] Figure 8 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0080] Fig. 9 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0081] Fig.10 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0082] Fig.11 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0083] Fig.12 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0084] Fig.13 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0085] Fig.14 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0086] Fig.15 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0087] Fig.16A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0088] Fig.17 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0089] Fig.18 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0090] Fig.19 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0091] Fig. 20 A schematic diagram of a drive control circuit according to another embodiment of the present invention is shown;

[0092] Fig.21 A block diagram of a household appliance according to an embodiment of the present invention is shown.

[0093] in, Figures 1 to 21 The circuit elements and their corresponding numbers in the driving control circuit 100 are as follows:

[0094] DC source DC, secondary bootstrap diode D 02 , Secondary bootstrap capacitor C 02 , first switch device Q1, first capacitive element C1, driver chip M, second capacitive element C2, inductive element L, inductive element L0, primary bootstrap diode D 01 , primary bootstrap capacitor C 01 , AC signal AC, a second switching device Q2, a resistive element R, and a third capacitive element C3. DETAILED DESCRIPTION

[0095] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0096] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0097] Refer to the following Figures 1 to 21 The driving control circuit and the household electrical appliance according to some embodiments of the present invention are described.

[0098] like Figures 1 to 6As shown, in an embodiment of the first aspect of the present invention, a drive control circuit 100 is provided, comprising: a voltage absorption compensation branch, connected to the bus line between the rectifier module and the inverter, the voltage absorption compensation branch comprising: a first switch device Q and a first capacitive element C1 connected in series, the first switch device Q is configured to control the first capacitive element C1 to charge or discharge, the first capacitive element C1 discharges to perform voltage compensation on the inverter, wherein the first switch device Q is controlled by a drive chip M, the power supply of the drive chip M is an isolated power supply or a bootstrap power supply, wherein the bootstrap power supply comprises a bootstrap power supply circuit of the inverter, a secondary bootstrap diode D of the switch device 02 and the secondary bootstrap capacitor C 02 , the secondary bootstrap diode D 02 The anode of the secondary bootstrap diode D is connected to the positive electrode of the inverter bootstrap power supply circuit. 02 The negative terminal is connected to the secondary bootstrap capacitor C 02 The positive electrode of the secondary bootstrap capacitor C 02 The positive electrode is connected to the power supply terminal of the driving chip M of the first switching device Q.

[0099] In this technical solution, the drive control circuit is connected to the power supply signal, which is converted into a DC signal through the rectifier module. The inverter controls the DC signal to power the load. When the power supply signal is low, beat frequency noise will be generated. Therefore, by setting a voltage absorption compensation circuit, when the power supply signal is low, the voltage absorption compensation circuit can perform voltage compensation on the inverter, thereby effectively reducing the beat frequency noise and improving the reliability of the drive control circuit and the stability of the inverter.

[0100] In addition, the charging or discharging of the first capacitive element C1 is controlled by the conduction state of the switch device, and the switch device is controlled by the driver chip M. Therefore, by setting the bootstrap power supply including the bootstrap power supply circuit in the inverter, the secondary bootstrap diode D 02 (not part of the inverter) and the secondary bootstrap capacitor C 02 (not belonging to the inverter), which not only provides a reliable power supply for the driving chip M, but also simplifies the design cost of the driving control circuit.

[0101] The specific embodiments are described as follows:

[0102] Figure 1 The driving control circuit of the three-phase load is shown, the power supply of the driving chip M is a bootstrap power supply, and the secondary bootstrap diode D 02 Includes a bootstrap diode.

[0103] Figure 2The driving control circuit of the three-phase load is shown, the power supply of the driving chip M is a bootstrap power supply, and the secondary bootstrap diode D 02 Includes two bootstrap diodes.

[0104] Figure 3 The driving control circuit of the three-phase load is shown, the power supply of the driving chip M is a bootstrap power supply, and the secondary bootstrap diode D 02 Includes three bootstrap diodes.

[0105] Figure 4 The driving control circuit of the three-phase load is shown, and the power supply of the driving chip M is an isolated power supply.

[0106] Figure 5 The driving control circuit of a single-phase load is shown, in which the power supply of the driving chip M is a bootstrap power supply, and the secondary bootstrap diode D 02 Includes a bootstrap diode.

[0107] Figure 6 The driving control circuit of a single-phase load is shown, in which the power supply of the driving chip M is a bootstrap power supply, and the secondary bootstrap diode D 02 Includes two bootstrap diodes.

[0108] Figure 7 The driving control circuit of a single-phase load is shown, and the power supply of the driving chip M is an isolated power supply.

[0109] In this technical solution, a DC source DC is provided in the inverter, and the DC source DC is used to provide the voltage required for the operation of the upper bridge arm power device and the lower bridge arm power device, wherein the upper bridge arm power device and the lower bridge arm power device are controlled by a driver chip, which are respectively recorded as a first driver chip and a second driver chip, and the power supply end of the second driver chip is directly connected to the positive electrode of the DC source DC, and the positive electrode of the DC source DC is connected to the primary bootstrap diode D 01 Anode of the primary bootstrap diode D 01 The cathode of the inverter is connected to the primary bootstrap capacitor C 01 The positive pole of the inverter, at the same time, the primary bootstrap capacitor C 01 The positive electrode (inside the inverter) is also connected to the power supply end of the first driver chip, wherein the bootstrap power supply circuit includes a DC source DC inside the inverter, a primary bootstrap diode D 01 and a bootstrap capacitor C 01 , that is, the bootstrap power supply is mainly based on the bootstrap power supply circuit inside the inverter (primary bootstrap), the secondary bootstrap diode D 02 and the secondary bootstrap capacitor C 02 The primary bootstrap diode D 01 On this basis, a secondary bootstrap is performed to provide a voltage signal for driving the chip M to operate.

[0110] Among them, the commonly used specifications of the above-mentioned direct current source DC are 5V, 12V and 24V.

[0111] In addition, the above-mentioned isolated power supply is mainly based on the transformer to power the driver chip. The isolated power supply includes a transformer, a secondary bootstrap diode D 02 and the secondary bootstrap capacitor C 02 The primary side of the transformer receives the electrical signal, which is then fed through the secondary bootstrap diode D 02 and the secondary bootstrap capacitor C 02 Raise the voltage to the operating voltage of the driver chip.

[0112] In one embodiment of the present invention, further, Figure 2 As shown, if the load is a single-phase load, the drive control circuit 100 includes a two-phase upper bridge arm power device Q1 and a two-phase lower bridge arm power device Q2.

[0113] In addition, the driving control circuit 100 in the above technical solution provided by the present invention may also have the following additional technical features:

[0114] In the above technical solution, further, the bus line includes a high-voltage bus and a low-voltage bus, and the inverter includes: an upper bridge arm power device and a lower bridge arm power device connected in series, bridged between the high-voltage bus and the low-voltage bus, a reverse-biased freewheeling diode is provided between the source and the drain of the upper bridge arm power device, recorded as a first reverse-biased freewheeling diode, and a reverse-biased freewheeling diode is provided between the source and the drain of the lower bridge arm power device, recorded as a second reverse-biased freewheeling diode, wherein the upper bridge arm power device and the lower bridge arm power device of the same phase are not turned on at the same time.

[0115] In this technical solution, the upper arm power device and the lower arm power device are core components of the inverter. Whether they can be reliably turned on or off depends not only on the driver chip M, but also on whether the power supply signal is normal. In particular, when the power supply signal is low, it may cause abnormal opening of the power device of the inverter, and then cause beat frequency noise, which not only affects the reliability of the compressor operation, but is also the main reason for the beat frequency noise of household appliances. Therefore, by setting a voltage absorption compensation branch at the input stage of the inverter, the inverter can be effectively compensated for voltage, thereby reducing beat frequency noise and abnormal noise, so as to enhance the user experience.

[0116] In any of the above technical solutions, further, the inverter is configured to control the process of the power supply signal supplying power to the load. If the load is a single-phase load, the inverter includes two-phase upper bridge arm power devices and lower bridge arm power devices. If the load is a three-phase load, the inverter includes three-phase upper bridge arm power devices and lower bridge arm power devices.

[0117] In any of the above technical solutions, further, the inverter is configured to control the process of the power supply signal supplying power to the load. If the load is a single-phase load, the inverter includes two-phase upper bridge arm power devices and lower bridge arm power devices. If the load is a three-phase load, the inverter includes three-phase upper bridge arm power devices and lower bridge arm power devices.

[0118] In any of the above technical solutions, it further includes: if the power supply signal is greater than or equal to the first power supply signal threshold, the driver chip M triggers the first switch device Q1 to turn on in the first mode to control the first capacitive element C1 to charge; if the driver chip M detects that the power supply signal is less than the second power supply signal threshold, the driver chip M triggers the first switch device Q1 to turn on in the second mode to control the first capacitive element C1 to discharge.

[0119] The first power supply signal threshold and the second power supply signal threshold may take 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.

[0120] In this technical solution, the collected power supply signal is compared with a preset power supply signal threshold. When the power supply signal exceeds the first power supply signal threshold, it means that the power supply signal is high. At this time, the driver chip M controls the switch device to be turned on in the first mode to charge the first capacitive element C1 or keep the first capacitive element C1 inactive. When the power supply signal is less than the second power supply signal threshold, it means that the power supply signal is too low. At this time, the driver chip M controls the switch device to be turned on in the second mode to discharge the first capacitive element C1, thereby realizing voltage compensation and avoiding system power fluctuations, thereby solving the beat frequency noise problem caused by the input power supply signal being too low.

[0121] Figure 8 A driving control circuit for a unidirectional load is shown, wherein a first switching device Q1 is controlled by a switching power supply unit, and the switching power supply unit includes a driving chip M and a power supply source thereof.

[0122] In any of the above technical solutions, further, the first switching device Q1 includes: a power tube, which is connected in series with the first switching device Q1, and the control end of the power tube is connected to the instruction output end of the driving chip M, and the instruction output end outputs a control instruction to the control end, and the control instruction is configured to control the power tube to be turned on or off; a third reverse-biased freewheeling diode D1, and the two ends of the third reverse-biased freewheeling diode D1 are respectively connected to the drain and source of the power tube, wherein, if the power tube is turned on, the first capacitive element C1 discharges to the load through the power tube, and if the power tube is turned off, the first capacitive element C1 is charged through the third reverse-biased freewheeling diode D1.

[0123] In this technical solution, the switch device includes a power tube and a third reverse-biased freewheeling diode D1. The power tube is connected in series with the first capacitive element C1. The command output end of the driver chip M is connected to the control end of the power tube to send a control command to the power tube, and the power tube changes the conduction state (on or off) according to the control command. The two ends of the third reverse-biased freewheeling diode D1 are respectively connected to the drain and source of the power tube. When the power tube is turned on, the first capacitive element C1 discharges to the load through the power tube to achieve voltage compensation for the inverter. When the power tube is turned off, the input voltage signal charges the first capacitive element C1 through the third reverse-biased freewheeling diode D1 to reduce the load current peak.

[0124] Among them, the charging of the first capacitive element C1 through the third reverse-biased freewheeling diode D1 means that the power supply signal charges the first capacitive element C1 through the third reverse-biased freewheeling diode D1, and at the same time, the power supply signal supplies power to the running load, the DC signal can charge the first capacitive element C1, or the first capacitive element C1 is not in action during the complete charging process, that is, when the first capacitive element C1 is discharged, the discharge voltage of the first capacitive element C1 is greater than the power supply voltage on the line, thereby realizing voltage compensation for the inverter.

[0125] Specifically, the power tube can preferably use an IGBT (Insulated Gate Bipolar Transistor) type power tube, or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The reverse-biased freewheeling diode can be set independently or integrated with the IGBT or MOSFET.

[0126] like Fig. 9 and Fig.13As shown, in any of the above technical solutions, further, the drive control circuit also includes: a harmonic filtering module, which is arranged at the input end of the inverter, and the harmonic filtering module is configured to filter out the harmonic signal in the power supply signal.

[0127] In this technical solution, by arranging the harmonic filtering module at the input end of the inverter, the power supply signal input from the power grid system is filtered to reduce the interference of the harmonic signal on the inverter, which is beneficial to improving the reliability and beat frequency noise of the inverter.

[0128] In any of the above technical solutions, further, the harmonic filtering module includes a second capacitive element C2, and the second capacitive element C2 is connected across two AC lines in the drive control circuit, and the signal carried by the AC line is an AC signal AC.

[0129] In this technical solution, the harmonic filtering module includes a second capacitive element C2 connected across two AC lines on the AC side of the drive control circuit. Specifically, the capacitive element is a filter capacitor, which filters out noise in the AC signal AC carried on the AC line.

[0130] In any of the above technical solutions, further, the second capacitive element C2 includes a capacitor element, and / or the first capacitive element C1 includes a plurality of capacitor elements connected in series and / or in parallel, wherein the capacitance of the second capacitive element C2 ranges from 1uF to 100uF.

[0131] Optionally, the capacitance of the second capacitive element C2 ranges from 10uF to 20uF.

[0132] like Fig.10 and Fig.14 As shown, in any of the above technical solutions, further, the harmonic filtering module also includes an inductive element L, the inductive element L is connected in series to at least one AC line in the drive control circuit, the AC line carries an AC signal AC, wherein the inductance value range of the inductive element L is 200uH~25mH.

[0133] In this technical solution, the harmonic filtering module is also provided with an inductive element L, which is connected in series to at least one AC line of the AC measurement in the drive control circuit. The inductive element L is a filter inductor, and the noise in the AC signal AC carried by the AC line is filtered out by the filter inductor.

[0134] Optionally, the inductance of the inductive element L ranges from 200uH to 25mH.

[0135] Optionally, the inductance of the inductive element L is 500uH.

[0136] Optionally, the inductance of the inductive element L is 5 mH.

[0137] like Fig.11 and Fig.12 As shown, in any of the above technical solutions, further, the harmonic filtering module also includes an inductive element L, and the harmonic filtering module also includes an inductive element L, and the inductive element L is connected in series to the high-voltage bus ( Fig.12 and Fig.15 ) and / or low voltage busbar ( Fig.11 and Fig.16 ), wherein the inductance value range of the inductive element L is 200uH~25mH.

[0138] In this technical solution, the inductive element L is connected in series to at least one DC line of the DC measurement in the drive control circuit. The inductive element L is a filter inductor, and the noise in the DC power supply signal carried by the DC line is filtered out by the filter inductor.

[0139] Optionally, the inductance of the inductive element L ranges from 200uH to 25mH.

[0140] Optionally, the inductance of the inductive element L is 500uH.

[0141] Optionally, the inductance of the inductive element L is 5 mH.

[0142] In addition, the configuration of the harmonic filtering module can also be described with reference to the following figures and embodiments:

[0143] Fig.17 A driving control circuit 100 for a three-phase load is shown, wherein the second switch device is configured as a resistive element R, and the harmonic filtering module includes a second capacitive element C2 and an inductive element L arranged in the AC line.

[0144] Fig.18 A driving control circuit 100 for a three-phase load is shown, wherein the second switch device is configured as a resistive element R, and the harmonic filtering module includes an inductive element L arranged in an AC line.

[0145] Fig.19 A driving control circuit 100 for a three-phase load is shown, wherein the second switch device is configured as a resistive element R, and the harmonic filtering module includes an inductive element L arranged in a low-voltage bus.

[0146] Fig. 20 A driving control circuit 100 for a three-phase load is shown, wherein the second switch device is configured as a resistive element R, and the harmonic filtering module includes an inductive element L arranged in the high-voltage bus.

[0147] In any of the above technical solutions, further, the drive control circuit also includes: a rectifier module, which is arranged between the input end of the first capacitive element C1 and the power grid system, and the rectifier module is configured to convert the AC signal AC into a DC signal, wherein the DC signal is configured to charge the first capacitive element C1 and provide the power required for the operation of the load.

[0148] In this technical solution, a rectifier module is provided in the drive control circuit, and the rectifier module is connected between the input end of the first capacitive element C1 and the power grid system. The power supply signal includes an AC signal AC and a DC signal, wherein the AC signal AC input by the power grid system enters the rectifier module, the rectifier module rectifies the AC signal AC, and outputs the DC signal obtained after rectification to the first capacitive element C1 and the load part, so as to charge the first capacitive element C1 or keep the first capacitive element C1 inactive, and provide the load with the power required for operation.

[0149] In any of the above technical solutions, further, the drive control circuit also includes: a third capacitive element C3 and a second switching device Q2 connected in series, connected between the high-voltage bus and the low-voltage bus; a fourth reverse-biased freewheeling diode, wherein both ends of the fourth reverse-biased freewheeling diode are respectively connected to the drain and source of the second switching device Q2, wherein the first switching device Q1 is turned on and the second switching device Q2 is turned on alternately.

[0150] In any of the above technical solutions, the drive control circuit also includes a third capacitive element C3 and a second switch device Q2 connected in series between the high-voltage bus and the low-voltage bus, and a fourth reverse-biased freewheeling diode whose two ends are respectively connected to the drain and source of the second switch device Q2. The second switch device Q2 changes its conduction state under the control of the drive chip M, and the first switch device Q1 is turned on and the second switch device Q2 is turned on alternately. When the first switch device Q1 is turned on, the first capacitive element C1 discharges to achieve voltage compensation, which is beneficial to overcome problems such as system power fluctuations and beat frequency noise. At the same time, the second switch device Q2 is turned off, and the discharge current of the first capacitive element C1 does not flow through the third capacitive capacitor, thereby avoiding the occurrence of excessive charging current of the third capacitive element C3 (usually a thin film capacitor), further improving the reliability of the drive control circuit.

[0151] In addition, when the first switch device Q1 is turned off and the second switch device Q2 is turned on, the third capacitive element C3 can filter out the harmonic signal in the DC signal, which is beneficial to further overcome the problems of system power fluctuation and beat frequency noise. At this time, the DC signal can charge the first capacitive element C1, or the first capacitive element C1 does not operate, further improving the stability of the drive control circuit.

[0152] Optionally, the second switching device Q2 is a power switch tube or a resistive element R.

[0153] In any of the above technical solutions, further, any of the upper bridge arm power devices includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein 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.

[0154] 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). When an insulated gate bipolar transistor is used, the collector of the insulated gate bipolar transistor is connected as the drain and the emitter is connected as the source.

[0155] In any of the above technical solutions, further, any of the lower bridge arm power devices includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein 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.

[0156] In this technical solution, the lower bridge arm power device includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and / or an insulated gate bipolar transistor (i.e., IGBT). When an insulated gate bipolar transistor is used, the collector of the insulated gate bipolar transistor is connected as the drain and the emitter is connected as the source.

[0157] In any of the above technical solutions, further, the power tube includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, wherein the gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal of the driving chip M as the control terminal, and the base of the insulated gate bipolar transistor is connected to the command output terminal of the driving chip M as the control terminal.

[0158] In this technical solution, the power tube includes a metal oxide semiconductor field effect transistor (i.e., MOSFET) and / or an insulated gate bipolar transistor (i.e., IGBT), wherein the gate of the MOSFET serves as a control terminal, the command output terminal of the driver chip M is connected to the gate of the MOSFET, the MOSFET of the IGBT serves as a control terminal, and the command output terminal of the driver chip M is connected to the base of the IGBT.

[0159] In any of the above technical solutions, further, the load includes a fan and / or a compressor.

[0160] In any of the above technical solutions, further, the load includes an induction motor and / or a permanent magnet synchronous motor.

[0161] In any of the above technical solutions, further, the first capacitive element C1 includes an electrolytic capacitor, and / or the first capacitive element C1 includes one capacitive element, and / or the first capacitive element C1 includes a plurality of capacitive elements connected in series and / or in parallel.

[0162] In any of the above technical solutions, further, the capacitance value of the first capacitive element C1 ranges from 10uF to 2000uF.

[0163] Optionally, the capacitance of the first capacitive element C1 is 82uF.

[0164] Optionally, the capacitance of the first capacitive element C1 is 220uF.

[0165] Optionally, the capacitance of the first capacitive element C1 is 470uF.

[0166] Optionally, the capacitance of the first capacitive element C1 is 560uF.

[0167] Optionally, the capacitance of the first capacitive element C1 is 680uF.

[0168] Optionally, the capacitance of the first capacitive element C1 is 820uF.

[0169] In any of the above technical solutions, further, in any of the above technical solutions, further, the voltage absorption compensation branch also includes: a resistor element and / or an inductor element L0 connected in series with the first capacitive element C1, the resistor element is used to adjust the current flowing through the first capacitive element C1, and the inductor element L0 is used to filter out the AC noise flowing through the first capacitive element C1.

[0170] In this technical solution, the resistance element and / or the inductance element L0 can be connected between the high voltage bus and the switch device, between the first capacitive element C1 and the low voltage bus, or between the switch device and the first capacitive element.

[0171] In addition, the resistance element includes one resistor, or multiple resistors connected in series and / or in parallel. Similarly, the inductance element L0 includes one inductance, or multiple inductances connected in series and / or in parallel.

[0172] In any of the above technical solutions, further, the resistance element has a value range of 0.1 mΩ to 10 Ω, and the inductance element L0 has a value range of 1 uH to 10 mH.

[0173] like Fig.21As shown, in an embodiment of the present invention, a household appliance 300 is provided, including: a load 200; a drive control circuit 100 as described in any of the above embodiments, the drive control circuit 100 is connected between the power grid system and the load, and the drive control circuit 100 is configured to control the power grid system to supply power to the load 200.

[0174] In this embodiment, the household appliance 300 includes the driving control circuit 100 as described in any of the above embodiments. Therefore, all the beneficial effects of the household appliance including the driving control circuit 100 as described in any of the above embodiments are not repeated again.

[0175] In one embodiment of the present invention, further, the household appliance 300 includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner and a computer host.

[0176] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship described in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0177] In the description of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0178] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drive control circuit, characterized in that: include: The voltage absorption compensation branch is connected to the bus line between the rectifier module and the inverter, and the voltage absorption compensation branch includes: a first switching device and a first capacitive element connected in series, wherein the first switching device is configured to control the first capacitive element to charge or discharge, and the first capacitive element discharges to perform voltage compensation on the inverter, Wherein, the first switch device is controlled by a driver chip, and the power supply of the driver chip is a bootstrap power supply. Wherein, the bootstrap power supply includes a bootstrap power supply circuit of the inverter, a secondary bootstrap diode and a secondary bootstrap capacitor of the switching device, the anode of the secondary bootstrap diode is connected to the positive electrode of the bootstrap power supply circuit of the inverter, the cathode of the secondary bootstrap diode is connected to the positive electrode of the secondary bootstrap capacitor, the anode of the secondary bootstrap capacitor is connected to the power supply terminal of the driving chip of the first switching device, and the cathode of the secondary bootstrap capacitor is connected to the bus line; The bus line includes a high-voltage bus and a low-voltage bus; The drive control circuit also includes: A third capacitive element and a second switch device connected in series are connected between the high-voltage bus and the low-voltage bus; a fourth reverse biased freewheeling diode, wherein two ends of the fourth reverse biased freewheeling diode are respectively connected to the drain and the source of the second switching device, Wherein, the first switch device and the second switch device are turned on alternately; The bootstrap power supply circuit includes a DC source inside the inverter, a primary bootstrap diode and a primary bootstrap capacitor; The voltage absorption compensation branch also includes: A resistance element and / or an inductance element connected in series with the first capacitive element, the resistance element is used to adjust the current flowing through the first capacitive element, and the inductance element is used to filter out AC noise flowing through the first capacitive element.

2. The drive control circuit according to claim 1, characterized in that: The inverter comprises: The upper bridge arm power device and the lower bridge arm power device connected in series are connected between the high voltage bus and the low voltage bus. A reverse biased freewheeling diode is provided between the source and drain of the upper bridge arm power device, which is referred to as a first reverse biased freewheeling diode. A reverse biased freewheeling diode is provided between the source and drain of the lower bridge arm power device, which is recorded as a second reverse biased freewheeling diode. The upper bridge arm power device and the lower bridge arm power device of the same phase are not turned on at the same time.

3. The drive control circuit according to claim 2, characterized in that: The inverter is configured to control the process of the power supply signal supplying power to the load. If the load is a single-phase load, the inverter includes two-phase upper bridge arm power devices and two-phase lower bridge arm power devices. If the load is a three-phase load, the inverter includes three-phase upper bridge arm power devices and three-phase lower bridge arm power devices.

4. The drive control circuit according to claim 3, characterized in that: Also includes: If the power supply signal is greater than or equal to a first power supply signal threshold, the driver chip triggers the first switch device to conduct in a first mode to control the first capacitive element to charge. If the driver chip detects that the power supply signal is less than a second power supply signal threshold, the driver chip triggers the first switch device to conduct in a second mode to control the first capacitive element to discharge.

5. The drive control circuit according to claim 4, characterized in that: The first switching device comprises: A power tube, wherein the control end of the power tube is connected to the instruction output end of the driving chip, and the instruction output end outputs a control instruction to the control end, and the control instruction is configured to control the power tube to be turned on or off; a third reverse biased freewheeling diode, wherein two ends of the third reverse biased freewheeling diode are respectively connected to the drain and source of the power tube, Wherein, if the power tube is turned on, the first capacitive element discharges to the load through the power tube, and if the power tube is turned off, the first capacitive element is charged through the third reverse-biased freewheeling diode.

6. The drive control circuit according to claim 2, characterized in that: Also includes: The harmonic filtering module is arranged at the input end of the inverter, and the harmonic filtering module is configured to filter out the harmonic signal in the power supply signal.

7. The drive control circuit according to claim 6, characterized in that: The harmonic filtering module includes a second capacitive element, which is connected across two AC lines in the drive control circuit. The signal carried by the AC lines is the power supply signal.

8. The drive control circuit according to claim 7, characterized in that: The second 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, The capacitance of the second capacitive element ranges from 1uF to 100uF.

9. The drive control circuit according to claim 6, characterized in that: The harmonic filtering module further includes an inductive element, which is connected in series to at least one AC line in the drive control circuit, and the signal carried by the AC line is the power supply signal. The inductance of the inductive element ranges from 200uH to 25mH.

10. The drive control circuit according to claim 6, characterized in that: The harmonic filtering module further includes an inductive element, which is connected in series to the high-voltage bus and / or the low-voltage bus. The inductance of the inductive element ranges from 200uH to 25mH.

11. The drive control circuit according to claim 3, characterized in that: The second switch device is a power switch tube or a resistive element.

12. The drive control circuit according to claim 3, characterized in that: Any of the upper bridge arm power devices comprises a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, Any of the lower bridge arm power devices comprises a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor, Wherein, 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.

13. The drive control circuit according to claim 5, characterized in that: The power transistor includes a metal oxide semiconductor field effect transistor and / or an insulated gate bipolar transistor. The gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal of the driving chip as the control terminal, and the base of the insulated gate bipolar transistor is connected to the command output terminal of the driving chip as the control terminal.

14. The drive control circuit according to claim 3, characterized in that: The loads include fans and / or compressors, or The load includes an induction motor and / or a permanent magnet synchronous motor.

15. The drive control circuit according to any one of claims 1 to 14, characterized in that: The first capacitive element includes an electrolytic capacitor.

16. The drive control circuit according to any one of claims 1 to 14, characterized in that: The first capacitive element includes one capacitive element, or the first capacitive element includes a plurality of capacitive elements connected in series and / or in parallel.

17. The drive control circuit according to any one of claims 1 to 14, characterized in that: The capacitance value of the first capacitive element ranges from 10uF to 2000uF.

18. The drive control circuit according to any one of claims 1 to 14, characterized in that: The value range of the resistance element is 0.1mΩ~10Ω, and the value range of the inductance element is 1uH~10mH.

19. A household appliance, characterized in that: include: load; The drive control circuit according to any one of claims 1 to 18, wherein the drive control circuit is configured to control a power supply signal to supply power to a load.

20. The household appliance according to claim 19, characterized in that: The household electrical appliances include at least one of an air conditioner, a refrigerator, a fan, a range hood, a vacuum cleaner and a computer host.

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