CN210053343U - Drive control circuit and household electrical appliance - Google Patents
Drive control circuit and household electrical appliance Download PDFInfo
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- CN210053343U CN210053343U CN201921045879.6U CN201921045879U CN210053343U CN 210053343 U CN210053343 U CN 210053343U CN 201921045879 U CN201921045879 U CN 201921045879U CN 210053343 U CN210053343 U CN 210053343U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a drive control circuit and tame electric installation, wherein, drive control circuit includes: a half-bridge circuit configured to perform a conversion process on a supply signal, the half-bridge circuit including: a switching tube configured to have a control end; the filtering module is configured to filter electromagnetic interference signals generated by the switch tube, and the filtering module is connected to a conducting line of the half-bridge circuit. Through the technical scheme of the utility model, reduced the electromagnetic interference signal that the switch tube produced at the high frequency switch in-process, be favorable to promoting circuit sampling signal's accuracy and control process's reliability.
Description
Technical Field
The utility model relates to a drive control field particularly, relates to a drive control circuit and a household electrical appliances.
Background
In the current inverter air-conditioning market, in order to improve the operating energy efficiency of a load, a driving control circuit of a motor (load) is generally formed by a rectifier, an inductor, a Power Factor Correction (PFC) module, an electrolytic capacitor and an inverter.
In the related art, in order to reduce the power consumption of the BOOST PFC and the power consumption of the rectifier, the totem-pole PFC module is used to replace the BOOST PFC and the rectifier, but in order to further improve the energy efficiency of the circuit, at least one half-bridge circuit in the totem-pole PFC module is usually configured to maintain high-frequency operation, which causes a problem of excessive EMI (electromagnetic Interference) in the driving control circuit, and seriously affects the reliability of the driving control circuit.
Moreover, any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily known to a person of ordinary skill in the art, and any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily widely known or forms part of common general knowledge in the field.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
Therefore, an object of the present invention is to provide a driving control circuit.
It is yet another object of the present invention to provide a household appliance.
In an embodiment of the first aspect of the present invention, a driving control circuit is provided, including: a half-bridge circuit configured to perform a conversion process on a supply signal, the half-bridge circuit including: a switching tube configured to have a control end; the filtering module is configured to filter electromagnetic interference signals generated by the switch tube, and the filtering module is connected to a conducting line of the half-bridge circuit.
In the technical scheme, because the half-bridge circuit is provided with the switching tube, the switching tube can generate high di/dt and dv/dt when working according to a specified pulse driving signal, the driving control circuit is respectively embodied as a surge circuit and a peak voltage, and the driving pulse signal of the switching tube is usually a rectangular wave, in addition, the source-drain waveform of a MOSFET (Metal-Oxide-Semiconductor field effect Transistor) is also similar to a rectangular wave, the reciprocal of the period of the rectangular wave determines the fundamental frequency of the waveform, while the inverse of the rising and falling edge times of the pulsed drive signal at high frequencies determines the frequency value of the frequency component, which is typically in the order of MHz, while the harmonic frequencies are higher, these all cause serious disturbances to the sampling signal, the drive signal and the operational reliability in the drive control circuit.
Therefore, to the electromagnetic interference signal that produces in the switch tube, set up the filtering module and insert in among the switching-on circuit of half-bridge circuit, the electromagnetic interference signal who carries among the mainly used absorption half-bridge circuit output signal, and then reduced the interference of electromagnetic interference signal to drive control circuit, especially, be favorable to promoting the reliability of sampling signal, drive signal and operation among the drive control circuit.
In addition, it is worth particularly emphasizing that reducing the electromagnetic interference signal is very significant for the switching tube itself, because the electromagnetic interference signal may cause the switching tube to be turned on in advance, turned on in delay or broken down in the process that the switching tube operates according to the specified pulse driving signal, and the technical scheme of the application can further improve the reliability of the operation of the switching tube by filtering the electromagnetic interference signal, and is beneficial to reducing the failure rate of the switching tube.
The pulse driving signal includes, but is not limited to, an on-time, a duty cycle, a switching frequency, and the like.
Optionally, a capacitive element is usually provided in the filter module to absorb the electromagnetic interference signal.
In addition, according to the drive control circuit of the above embodiment of the present invention, the following additional technical features may also be provided:
in any of the above technical solutions, optionally, the method further includes: the bridge type module, the bridge type module includes two parallelly connected half-bridge circuit, if the input of bridge type module inserts alternating current signal, then the output direct current signal of bridge type module, if the input of bridge type module inserts direct current signal, then the output alternating current signal of bridge type module, wherein, the appearance value of filtering module with be the negative correlation between the switching frequency of switch tube.
In the technical scheme, the switching processing of the power supply signal is realized by switching on and off the switching tube, generally, an input alternating current signal is converted into a direct current signal, or the input direct current signal is converted into the alternating current signal, because the switching tube continuously acts in a load operation stage, a large amount of spike signals and electromagnetic interference signals can be generated, and the switching frequency is higher, the electromagnetic interference signals are higher, the electric signal transmission to a next-stage circuit module can be influenced, therefore, the capacitance value of the filtering module is in negative correlation with the switching frequency, and the filtering effect on the electromagnetic interference signals is improved.
In any of the above technical solutions, optionally, the method further includes: the power factor correction module comprises two half-bridge circuits which are connected in parallel, switch tubes of four bridge arms of the power factor correction module are sequentially marked as a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, a public end between the first switch tube and the second switch tube is connected to a first input line of an alternating current signal, a public end between the third switch tube and the fourth switch tube is connected to a second input line of the alternating current signal, a public end between the first switch tube and the fourth switch tube is connected to a high-voltage bus corresponding to a pulsating direct current signal, and a public end between the second switch tube and the third switch tube is connected to a low-voltage bus corresponding to the pulsating direct current signal.
In this technical scheme, the Power Factor Correction module includes two half-bridge circuits connected in parallel, and the four bridge arms are all provided with a switch tube, so that a totem-pole PFC (Power Factor Correction) module is formed.
Alternatively, the switching tube in the totem-pole PFC module may be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), and the switching tube may be an S
iC-type power tube or G
aThe N-type power tube, therefore, the switching frequency of the switching tube can be further improved, and although the load operation energy efficiency can be further improved, the electromagnetic interference signal is stronger, which requires to add a filtering module to reduce the electromagnetic interference signal.
Optionally, a reverse freewheeling diode is integrated between the source (emitter) and the drain (collector) of the switching tube of the totem-pole PFC.
In any of the above technical solutions, optionally, a first end of the filtering module is connected to a common terminal between the first switch tube and the fourth switch tube, and a second end of the filtering module is connected to a common terminal between the second switch tube and the third switch tube, where the filtering module is configured to operate as an output-end filtering component of the power factor correction module, and the filtering module is configured to perform filtering processing on the converted direct current signal.
In the technical scheme, the first end of the filtering module is connected to the common end between the first switch tube and the fourth switch tube, the second end of the filtering module is connected to the common end between the second switch tube and the third switch tube, and the filtering module can filter the signal output by the PFC module so as to reduce the influence of the electromagnetic interference signal on the operation of a rear-stage circuit.
In any of the above technical solutions, optionally, the method further includes: the inverter comprises at least two half-bridge circuits connected in parallel, and the filtering module is used for filtering the converted alternating current signals.
In this technical scheme, if the inverter includes two half-bridge circuits that connect in parallel, then can drive single phase load operation, if the inverter includes three half-bridge circuits that connect in parallel, then can drive three phase load operation.
In any of the above technical solutions, optionally, the filtering module includes a capacitor element, or a plurality of capacitor elements connected in series and/or in parallel, where the capacitor element is an X capacitor or a thin film capacitor.
In the technical scheme, the X capacitor is connected across the zero line and the live line to eliminate noise between the zero line and the live line, namely differential mode interference, or called low-pass normal noise, and the X capacitor only allows 50Hz mains supply to pass through, so that the interference of the differential mode interference on a rear-stage circuit can be effectively reduced.
In any of the above technical solutions, optionally, the capacitance range of the filtering module is 0.01uF to 10 uF.
In any of the above technical solutions, optionally, the switch tube is a metal oxide semiconductor field effect transistor or an insulated gate bipolar transistor, wherein a gate of the metal oxide semiconductor field effect transistor is connected to an instruction output end of the controller, a reverse freewheel diode is connected between a source and a drain of the metal oxide semiconductor field effect transistor, a base of the insulated gate bipolar transistor is connected to the instruction output end of the controller, and a reverse freewheel diode is connected between an emitter and a collector of the insulated gate bipolar transistor.
In any of the above technical solutions, optionally, the method further includes: the electrolytic capacitor is arranged at the output end of the half-bridge circuit and is configured to receive the pulsating direct current signal and convert the pulsating direct current signal into a direct current signal; the inverter is connected to the output end of the electrolytic capacitor and is configured to control the direct current signal to supply power to a load, wherein the capacitance value of the electrolytic capacitor ranges from 10uF to 20000 uF.
In this technical scheme, set up electrolytic capacitor through the output at half-bridge circuit, on the one hand, electrolytic capacitor can provide the electric quantity of load operation, and on the other hand, electrolytic capacitor also can absorb the surge signal that contains among the drive control circuit, combines filtering module and electrolytic capacitor, can further reduce the electromagnetic interference signal and the noise that flow to the dc-to-ac converter, is favorable to promoting the reliability of load operation.
In any of the above technical solutions, optionally, the method further includes: the inductor is connected to a first input line corresponding to the alternating current signal, and the inductor is configured to store energy of an input signal of the power factor correction module.
In the technical scheme, the inductor is connected to the first input line corresponding to the alternating current signal, the inductor, the PFC module and the electrolytic capacitor work cooperatively, namely the electrolytic capacitor is precharged before the load runs, and when the charging voltage is greater than or equal to the starting voltage of the load, the electric quantity stored by the electrolytic capacitor drives the load to run, so that the impact of a power supply signal on the load in the power-on process is reduced.
In any of the above technical solutions, optionally, the method further includes: and the electric quantity detection module is connected into the second input line and is configured to detect the power supply quantity of the alternating current signal to the load, and the power supply quantity is used for adjusting the switching frequency of the switching tube.
In this technical scheme, insert in the second input line through setting up electric quantity detection module, detect the power supply signal to adjust switching frequency according to the testing result, for example, when detecting that the electric current in the power supply signal carries more spike signal, in order to avoid spike signal to pass through half-bridge circuit amplification and stack, can reduce electromagnetic interference signal and spike signal through reducing switching frequency.
In a second aspect of the present invention, a household electrical appliance is provided, including: a load; the drive control circuit according to any one of the aspects of the present invention is configured to control a power supply signal to supply power to a load.
In this technical solution, the home appliance includes the driving control circuit described in the above technical solution, so that the home appliance includes all the beneficial effects of the driving control circuit described in the above technical solution, and details are not repeated again.
In the above technical solution, optionally, 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.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, 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 schematic diagram of a drive control circuit according to an embodiment of the invention;
fig. 2 shows a schematic diagram of a drive control circuit according to another embodiment of the present invention;
fig. 3 shows a frequency spectrum test chart of a drive control circuit according to an embodiment of the present invention;
fig. 4 shows a frequency spectrum test chart of a drive control circuit according to another embodiment of the present invention;
fig. 5 shows a frequency spectrum test chart of a drive control circuit according to an embodiment of the present invention;
fig. 6 shows a frequency spectrum test chart of a drive control circuit according to another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The following describes a drive control circuit and a home appliance according to an embodiment of the present invention with reference to fig. 1 to 6.
As shown in fig. 1 and 2, a drive control circuit according to an embodiment of the present invention includes: a half-bridge circuit configured to convert a supply signal AC, the half-bridge circuit comprising: a switching tube configured to have a control end; the filtering module C is configured to filter electromagnetic interference signals generated by the switch tube, and the filtering module C is connected to a conducting line of the half-bridge circuit.
In the technical scheme, a switching tube is arranged in a half-bridge circuit, when the switching tube works according to a specified pulse driving signal, high di/dt and high dv/dt are generated, the high di/dt and the high dv/dt are respectively reflected as a surge circuit and a peak voltage in a driving control circuit, a driving pulse signal of the switching tube is usually a rectangular wave, in addition, a source-drain waveform of a Metal-Oxide-Semiconductor field effect Transistor (MOSFET) is also similar to the rectangular wave, the reciprocal of the period of the rectangular wave determines the fundamental frequency of the waveform, the reciprocal of the rising edge time and the reciprocal of the falling edge time of a high-frequency pulse driving signal determines the frequency value of a frequency component, the frequency value is usually in the order of MHz, the harmonic frequency value is higher, and the high frequency seriously interferes with a sampling signal, a driving signal and the operation reliability in the driving control circuit.
Therefore, to the electromagnetic interference signal that produces in the switch tube, set up filtering module C and insert in among the switching-on circuit of half-bridge circuit, the electromagnetic interference signal who carries among the mainly used absorption half-bridge circuit output signal has then reduced the interference of electromagnetic interference signal to drive control circuit, especially, is favorable to promoting the reliability of sampling signal, drive signal and operation among the drive control circuit.
In addition, it is worth particularly emphasizing that reducing the electromagnetic interference signal is very significant for the switching tube itself, because the electromagnetic interference signal may cause the switching tube to be turned on in advance, turned on in delay or broken down in the process that the switching tube operates according to the specified pulse driving signal, and the technical scheme of the application can further improve the reliability of the operation of the switching tube by filtering the electromagnetic interference signal, and is beneficial to reducing the failure rate of the switching tube.
The pulse driving signal includes, but is not limited to, an on-time, a duty cycle, a switching frequency, and the like.
Optionally, a capacitive element is usually provided in the filter module C to absorb the electromagnetic interference signal.
In addition, according to the drive control circuit of the above embodiment of the present invention, the following additional technical features may also be provided:
in any of the above technical solutions, optionally, the method further includes: the bridge type module, the bridge type module includes two parallelly connected half-bridge circuit, if the input of bridge type module inserts alternating current signal, then the output direct current signal of bridge type module, if the input of bridge type module inserts direct current signal, then the output alternating current signal of bridge type module, wherein, the appearance value of filter module C with be the negative correlation between the switching frequency of switch tube.
In the technical scheme, the switching processing of the power supply signal AC is realized by switching on and off the switching tube, generally, an input alternating current signal is converted into a direct current signal, or the input direct current signal is converted into an alternating current signal, because the switching tube continuously acts in a load operation stage, a large amount of spike signals and electromagnetic interference signals can be generated, and the higher the switching frequency is, the larger the electromagnetic interference signals are, the electric signal transmission to the next-stage circuit module can be influenced, and therefore, the capacitance value of the filtering module C is in negative correlation with the switching frequency, so that the filtering effect on the electromagnetic interference signals is improved.
In any of the above technical solutions, optionally, the method further includes: the power factor correction module comprises two half-bridge circuits connected in parallel, and the switching tubes of four bridge arms of the power factor correction module are sequentially marked as first switching tubes Q
1A second switch tube Q
2And a third switching tube Q
3And a fourth switching tube Q
4The first switch tube Q
1And the second switching tube Q
2The common end between the first input line and the third input line is connected with the first input line of the alternating current signal, and the third switching tube Q
3And the fourth switching tube Q
4A second input line of the alternating current signal is connected to a common terminal in between, and the first switch tube Q
1And the fourth switching tube Q
4The common end between the two is connected with a high-voltage bus corresponding to the pulsating direct current signal, and the second switching tube Q
2And the third switch tube Q
3The common end between the two is connected with a low-voltage bus corresponding to the pulsating direct current signal.
In this technical scheme, the Power Factor Correction module includes two half-bridge circuits connected in parallel, and the four bridge arms are all provided with a switch tube, so that a totem-pole PFC (Power Factor Correction) module is formed.
Optionally, the switching tube in the totem-pole PFC module may also be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), and the switching tube may also be a SiC type power tube or a GaN type power tube, so that the switching frequency of the switching tube may be further increased, and although the load operation energy efficiency may be further increased, the electromagnetic interference signal is stronger, which requires the filter module C to be added to reduce the electromagnetic interference signal.
Optionally, a reverse freewheeling diode is integrated between the source (emitter) and the drain (collector) of the switching tube of the totem-pole PFC, such as the first switching tube Q
1A first reverse freewheeling diode D is connected between the source and the drain
1A second switch tube Q
2A second reverse freewheeling diode D is connected between the source and the drain
2A third switching tube Q
3A third reverse freewheeling diode D is connected between the source and the drain
3Fourth switch tube Q
4A fourth reverse freewheeling diode D is connected between the source and the drain
4。
In any of the above technical solutions, optionally, the first end of the filtering module C is connected to the first switch tube Q
1And the fourth switching tube Q
4A second end of the filtering module C is connected to the second switch tube Q
2And the third switch tube Q
3Wherein the filter module C is configured to operate as an output filter component of the power factor correction module, and the filter module C is configured to perform filtering processing on the converted dc signal.
In the technical scheme, the first end of the filter module C is connected to the first switch tube Q
1And the fourth switching tube Q
4A second end of the filtering module C is connected to the second switch tube Q
2And the third switch tube Q
3And at the public end, the filtering module C can filter the signal output by the PFC module so as to reduce the influence of the electromagnetic interference signal on the operation of a post-stage circuit.
In any of the above technical solutions, optionally, the method further includes: the inverter comprises at least two half-bridge circuits connected in parallel, and the filtering module C is used for filtering the converted alternating current signals.
In this technical scheme, if the inverter includes two half-bridge circuits that connect in parallel, then can drive single phase load operation, if the inverter includes three half-bridge circuits that connect in parallel, then can drive three phase load operation.
In any of the above technical solutions, optionally, the filter module C includes a capacitor element, or a plurality of capacitor elements connected in series and/or in parallel, where the capacitor element is an X capacitor or a thin film capacitor.
In the technical scheme, the X capacitor is connected across the zero line and the live line to eliminate noise between the zero line and the live line, namely differential mode interference, or called low-pass normal noise, and the X capacitor only allows 50Hz mains supply to pass through, so that the interference of the differential mode interference on a rear-stage circuit can be effectively reduced.
In any of the above technical solutions, optionally, the capacitance range of the filter module C is 0.01uF to 10 uF.
In any of the above technical solutions, optionally, the switch tube is a metal oxide semiconductor field effect transistor or an insulated gate bipolar transistor, wherein a gate of the metal oxide semiconductor field effect transistor is connected to an instruction output end of the controller, a reverse freewheel diode is connected between a source and a drain of the metal oxide semiconductor field effect transistor, a base of the insulated gate bipolar transistor is connected to the instruction output end of the controller, and a reverse freewheel diode is connected between an emitter and a collector of the insulated gate bipolar transistor.
In any of the above technical solutions, optionally, the method further includes: the electrolytic capacitor E is arranged at the output end of the half-bridge circuit and is configured to receive the pulsating direct current signal and convert the pulsating direct current signal into a direct current signal; the inverter is connected to the output end of the electrolytic capacitor E and is configured to control the direct current signal to supply power to a load, wherein the capacitance value of the electrolytic capacitor E ranges from 10uF to 20000 uF.
In this technical scheme, through setting up electrolytic capacitor E at half-bridge circuit's output, on the one hand, electrolytic capacitor E can provide the electric quantity of load operation, and on the other hand, electrolytic capacitor E also can absorb the surge signal that contains among the drive control circuit, combines filtering module C and electrolytic capacitor E, can further reduce the electromagnetic interference signal and the noise that flow to the dc-to-ac converter, is favorable to promoting the reliability of load operation.
In any of the above technical solutions, optionally, the method further includes: and the inductor L is connected into a first input line corresponding to the alternating current signal and is configured to store energy of an input signal of the power factor correction module.
As shown in fig. 2, in this solution, by setting the inductor L to be connected to the first input line corresponding to the AC signal, the inductor L, PFC module and the electrolytic capacitor E cooperate to perform a pre-charging operation on the electrolytic capacitor E before the load operates, and when the charging voltage is greater than or equal to the starting voltage of the load, the amount of electricity stored in the electrolytic capacitor E drives the load to operate, so as to reduce the impact of the power supply signal AC on the load during the power-on process.
In any of the above technical solutions, optionally, the method further includes: and the electric quantity detection module S is connected into the second input line and is configured to detect the power supply quantity of the alternating current signal to the load, and the power supply quantity is used for adjusting the switching frequency of the switching tube.
In the technical scheme, the power supply signal AC is detected by setting the power detection module S to be connected to the second input line, and the switching frequency is adjusted according to the detection result, for example, when it is detected that the current in the power supply signal AC carries more peak signals, the electromagnetic interference signal and the peak signal can be reduced by reducing the switching frequency in order to avoid the peak signals from being amplified and superimposed by the half-bridge circuit.
According to the utility model discloses a household electrical appliances, include: a load; the drive control circuit according to any one of the preceding claims, wherein the drive control circuit is configured to control a power supply signal AC to supply power to a load.
In this technical solution, the home appliance includes the driving control circuit described in the above technical solution, so that the home appliance includes all the beneficial effects of the driving control circuit described in the above technical solution, and details are not repeated again.
In the above technical solution, optionally, 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.
Optionally, a first switch tube Q
1A second switch tube Q
2And a third switching tube Q
3And a fourth switching tube Q
4The controller is controlled by a controller, and in addition, the electric quantity detection module S also sends a detection Signal to the controller, where the controller may be one of a Micro-programmed Control Unit (MCU), a Central Processing Unit (CPU), a Digital Signal Processor (DSP), and an embedded device, but is not limited thereto.
Fig. 3 to 6 show test charts of disturbance power and disturbance voltage of the drive control circuit, and fig. 3 to 6 show schematic diagrams of a quasi-peak reference line, an average reference line, a quasi-peak actual measurement line, and an average actual measurement line.
As shown in fig. 3, the disturbance power when the filter module C is installed in the driving control circuit is, for example, much lower than 50 (unit dB × pW) in the range of 40kHz to 100 kHz.
As shown in fig. 4, the disturbance power when the filter module C is not provided in the drive control circuit is, for example, approximately 50 (unit dB × pW) in the range of 40kHz to 100 kHz.
As can be seen from comparison between fig. 3 and fig. 4, the density of disturbance power is significantly reduced after the filter module C is disposed in the driving circuit.
As shown in fig. 5, the disturbance voltage when the filter module C is provided in the drive control circuit is shown.
As shown in fig. 6, the disturbance voltage is a disturbance voltage when the filter module C is not provided in the drive control circuit.
Comparing fig. 5 and fig. 6, it can be seen that the amplitude of the disturbance voltage is significantly reduced after the filter module C is disposed in the driving circuit.
To the technical problem who exists among the prior art, the utility model provides a drive control circuit and household electrical appliances, through the technical scheme of the utility model, to the electromagnetic interference signal who produces in the switch tube, set up the filtering module insert in half-bridge circuit's the circuit that switches on, mainly used absorbs the electromagnetic interference signal who carries in the half-bridge circuit output signal, and then has reduced the interference of electromagnetic interference signal to drive control circuit, especially, is favorable to promoting the reliability of sampling signal, drive signal and operation among the drive control circuit.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
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 (13)
1. A drive control circuit, comprising:
a half-bridge circuit configured to perform a conversion process on a supply signal, the half-bridge circuit including:
a switching tube configured to have a control end;
the filtering module is configured to filter electromagnetic interference signals generated by the switch tube, and the filtering module is connected to a conducting line of the half-bridge circuit.
2. The drive control circuit according to claim 1, further comprising:
a bridge module comprising two of said half-bridge circuits connected in parallel,
if the input end of the bridge module is connected with an alternating current signal, the output end of the bridge module outputs a direct current signal,
if the input end of the bridge module is connected with a direct current signal, the output end of the bridge module outputs an alternating current signal,
and the capacitance value of the filtering module and the switching frequency of the switching tube are in negative correlation.
3. The drive control circuit according to claim 2, further comprising:
a power factor correction module comprising two of the half-bridge circuits in parallel,
the switching tubes of four bridge arms of the power factor correction module are sequentially marked as a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, a common end between the first switching tube and the second switching tube is connected with a first input line of the alternating current signal, a common end between the third switching tube and the fourth switching tube is connected with a second input line of the alternating current signal,
and a common end between the first switch tube and the fourth switch tube is connected with a high-voltage bus corresponding to the pulsating direct current signal, and a common end between the second switch tube and the third switch tube is connected with a low-voltage bus corresponding to the pulsating direct current signal.
4. The drive control circuit according to claim 3,
a first end of the filtering module is connected to a common end between the first switch tube and the fourth switch tube, a second end of the filtering module is connected to a common end between the second switch tube and the third switch tube,
the filtering module is configured to operate as an output end filtering component of the power factor correction module, and the filtering module is configured to perform filtering processing on the converted direct-current signal.
5. The drive control circuit according to claim 1, further comprising:
the inverter comprises at least two half-bridge circuits connected in parallel, and the filtering module is used for filtering the converted alternating current signals.
6. The drive control circuit according to any one of claims 1 to 5,
the filtering module comprises a capacitor element or a plurality of capacitor elements connected in series and/or in parallel, wherein the capacitor element is an X capacitor or a thin film capacitor.
7. The drive control circuit according to any one of claims 1 to 5,
the capacitance value range of the filtering module is 0.01 uF-10 uF.
8. The drive control circuit according to any one of claims 1 to 5,
the switch tube is a metal oxide semiconductor field effect transistor or an insulated gate bipolar transistor,
the gate of the metal oxide semiconductor field effect transistor is connected to an instruction output end of the controller, a reverse freewheeling diode is connected between the source electrode and the drain electrode of the metal oxide semiconductor field effect transistor, the base electrode of the insulated gate bipolar transistor is connected to the instruction output end of the controller, and a reverse freewheeling diode is connected between the emitter electrode and the collector electrode of the insulated gate bipolar transistor.
9. The drive control circuit according to claim 3, characterized by further comprising:
the electrolytic capacitor is arranged at the output end of the half-bridge circuit and is configured to receive the pulsating direct current signal and convert the pulsating direct current signal into a direct current signal;
an inverter connected to an output of the electrolytic capacitor, the inverter configured to control the DC signal to power a load,
wherein the capacitance value range of the electrolytic capacitor is 10 uF-20000 uF.
10. The drive control circuit according to claim 3 or 4, characterized by further comprising:
the inductor is connected to a first input line corresponding to the alternating current signal, and the inductor is configured to store energy of an input signal of the power factor correction module.
11. The drive control circuit according to claim 3 or 4, characterized by further comprising:
and the electric quantity detection module is connected into the second input line and is configured to detect the power supply quantity of the alternating current signal to a load, and the power supply quantity is used for adjusting the switching frequency of the switching tube.
12. An appliance, comprising:
a load;
the drive control circuit of any one of claims 1 to 11, configured to control a supply signal to supply power to a load.
13. The home device of claim 12,
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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045879.6U CN210053343U (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household electrical appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045879.6U CN210053343U (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household electrical appliance |
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| CN210053343U true CN210053343U (en) | 2020-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233565A (en) * | 2019-07-05 | 2019-09-13 | 广东美的制冷设备有限公司 | Drive control circuit and household appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233565A (en) * | 2019-07-05 | 2019-09-13 | 广东美的制冷设备有限公司 | Drive control circuit and household appliance |
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