CN210007616U - Drive control circuit and household electrical appliance - Google Patents
Drive control circuit and household electrical appliance Download PDFInfo
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- CN210007616U CN210007616U CN201921045868.8U CN201921045868U CN210007616U CN 210007616 U CN210007616 U CN 210007616U CN 201921045868 U CN201921045868 U CN 201921045868U CN 210007616 U CN210007616 U CN 210007616U
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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 an kind drive control circuit and tame electric installation, wherein, drive control circuit includes half-bridge circuit, half-bridge circuit inserts in bus circuit, half-bridge circuit is configured to carry out the conversion treatment to power supply signal, every bridge arm of half-bridge circuit specifically includes the switch tube, the switch tube is configured to have the control end, the clamp unit is configured to the restriction the voltage value of the control end of switch tube, wherein, switch tube among the half-bridge circuit triggers at the initial moment of switching on the control end of second switch tube among the half-bridge circuit spike voltage appears, spike voltage can by the clamp unit weakens.
Description
Technical Field
The utility model relates to a drive control field particularly, relates to kinds of drive control circuit and kinds of 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 by steps, at least half-bridge circuits in the totem-pole PFC module are usually configured to maintain high-frequency operation, and because a parasitic capacitance exists between an input end (or a control end) and an output end of a switching tube, three ends of the switching tube are denoted as a gate g, a source s and a drain d, and based on the miller effect, it can be known that:
(1) the parasitic capacitance Cdg causes the two switching tubes of the half-bridge circuit to generate large peak voltage and oscillation in the alternate conduction process, and the reliability of the driving control circuit is seriously affected.
(2) Before the switching tube is switched on, junction capacitance and parasitic capacitance Cgs exist between the grid electrode and the source electrode, when the voltage between the grid electrode voltage and the source electrode voltage of the switching tube is larger than the switching tube conduction voltage, the switching tube can be conducted, and the Cgs is increased, so that the switching tube is long in response time and large in power consumption.
Additionally, any discussion of the background art throughout the specification is not intended to represent that background art is certainly known in the art by those skilled in the art, and any discussion of the prior art throughout the specification is not intended to represent that prior art is certainly well known as or that constitutes well known in the art.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to at least for solving the problems of the prior art or related art.
Therefore, aims to provide drive control circuits.
The utility model discloses a individual purpose propose kind household electrical appliances again.
The utility model discloses an technical scheme provides kinds of drive control circuits, including the half-bridge circuit, the half-bridge circuit inserts in the bus circuit, the half-bridge circuit is configured to carry out conversion processing to power supply signal, each bridge arm of half-bridge circuit specifically includes the switch tube, the switch tube is configured to have the control end, the clamp unit is configured to limit the voltage value of the control end of switch tube, wherein, the th switch tube in the half-bridge circuit triggers the control end of the second switch tube in the half-bridge circuit to appear spike voltage at the initial moment of switching on, spike voltage can be weakened by the clamp unit.
In the technical scheme, for a half-bridge circuit provided with at least two switching tubes, due to the fact that parasitic capacitors exist between the control ends and the output ends of the switching tubes, the parasitic capacitors can cause voltage interference between the two switching tubes under the amplification effect of the switching tubes, the switching tubes and the corresponding clamping units are arranged in the half-bridge circuit, the clamping units are arranged to limit the voltage values of the control ends of the switching tubes, peak voltages can be effectively absorbed, the possibility that the peak voltages cause direct connection of the half-bridge circuit is reduced, and the reliability and the stability of the half-bridge circuit are further improved.
Specifically, the th switching tube in the half-bridge circuit is in a cut-off state at the initial turn-on time, the miller effect may cause a spike voltage to occur at a control end of the second switching tube in the half-bridge circuit, and when the spike voltage reaches a turn-on limit threshold of the second switching tube, the second switching tube may be turned on, so that the th switching tube and the second switching tube are turned on at the same time, and short circuit damage occurs.
The clamping unit comprises at least capacitive elements, resistive elements and switching devices, the end of the clamping unit is connected to the control end, the conduction time of the switching tube is prolonged while spike voltage appearing at the control end is absorbed, and meanwhile, the power consumption of the switching tube is reduced.
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 above technical solution, optionally, the switch tube further has a end and a second end, when the switch tube is turned on, a current flows from the end to the second end, a bias resistor is connected between the control end and the second end, and when a turn-on signal is input to the control end, a divided voltage of the bias resistor is greater than a turn-on voltage threshold of the switch tube.
In this technical solution, the th end of the switch tube is denoted as an output end, the control end is an input end of the switch tube, and the bias resistor is connected between the second end and the control end, so that the PN junction between the gate and the source can be turned on by the voltage division of the bias resistor, which is beneficial to improving the reliability of the on signal input to the control end.
In any above, the clamping unit further includes a capacitive element connected in series between the control terminal and the second terminal of the switching tube, and the capacitive element is configured to bleed off the spike voltage.
In the technical scheme, the clamping unit comprises the capacitive element, the capacitive element is connected between the control end and the second end in series, and the capacitive element releases the peak voltage, namely the peak voltage is equivalent to neutralizing the electric quantity stored by the parasitic capacitor, so that the Miller effect in the half-bridge circuit is reduced, and the reliability of the half-bridge circuit is improved.
In any above, the clamping unit optionally includes a switching device, wherein a end of the switching device is connected to the control end, and a second end of the switching device is connected to the second end of the switching tube, so that when the spike voltage is generated at the control end of the switching tube, the switching device is turned on to discharge the spike voltage.
In the technical scheme, the switching device is connected between the control end and the second end, and then when the parasitic capacitance releases electric quantity to the capacitive element, the switching device can be in a conducting state, so that the peak voltage discharge efficiency is improved, and the reliability of the half-bridge circuit is further improved by .
In any above technical solution, optionally, the switching circuit further includes a driver, an output terminal of the driver is connected to the control terminal of the switching tube, a th switching resistor connected in series between the control terminal of the switching tube and the output terminal of the driver, and a second switching resistor and a unidirectional conducting element connected in series and connected in parallel with the th switching resistor, wherein when the driver outputs the on signal to the control terminal of the switching tube, the unidirectional conducting element is turned off, the on signal is transmitted to the control terminal of the switching tube through the th switching resistor, and when the driver outputs the off signal to the control terminal of the switching tube, the unidirectional conducting element is turned on, and the off signal is transmitted to the control terminal of the switching tube through the th switching resistor and the second switching resistor.
In the technical scheme, by arranging the driver, the th switch resistor, the second switch resistor and the unidirectional conducting element in the above manner, when the conducting signal is transmitted to the control end, only the th switch resistor is passed through, and when the cut-off signal is transmitted to the control end, the th switch resistor, the second switch resistor and the unidirectional conducting element are simultaneously conducted, so that the transmission speed of the cut-off signal is faster than that of the conducting signal, which is beneficial to improving the reliability of overcurrent protection of the switch tube, and in addition, the spike signal can be quickly released to the clamping unit through the th switch resistor, the second switch resistor and the unidirectional conducting element, thereby being beneficial to further -step reduction of the impact of the spike voltage on the switch tube, and reduction of the response time and power consumption of the switch tube.
In any above technical solution, optionally, the mobile terminal further includes a bridge module, where the bridge module includes two half-bridge circuits connected in parallel, and if an input end of the bridge module is connected to an ac signal, an output end of the bridge module outputs a dc signal, and if an input end of the bridge module is connected to a dc signal, an output end of the bridge module outputs an ac signal.
In this technical solution, the switching tube is turned on and off to convert the power supply signal, and usually, the input ac signal is converted into a dc signal, or the input dc signal is converted into an ac signal to drive the load to operate reliably.
In any technical solution, optionally, the power factor correction module further includes two half-bridge circuits connected in parallel, the switching tubes of four bridge arms of the power factor correction module are sequentially denoted as a switching tube, a second switching tube, a third switching tube and a fourth switching tube, a common end between the switching tube and the second switching tube is connected to a input line of the power supply signal, a common end between the third switching tube and the fourth switching tube is connected to a second input line of the power supply signal, a common end between the switching tube and the fourth switching tube is connected to a high-voltage bus corresponding to the pulsating direct current signal, and a common end between the second switching tube and the third switching 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, optionally, an upper switch tube in the half-bridge circuit is an NPN-type triode, a lower switch tube is a PNP-type triode, the upper switch tube and the lower switch tube are connected by a common emitter, and the emitter is also output ends of the totem-pole PFC module.
Alternatively, 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 switching tube or a GaN switching tube, so that the switching frequency of the switching tube may be further increased by , and although the load operation energy efficiency may be further increased by , the electromagnetic interference signal is stronger, which requires a filter 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 technical solution above, 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 terminal 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 terminal of the controller, and a reverse freewheel diode is connected between an emitter and a collector of the insulated gate bipolar transistor.
In any technical solution above, optionally, the power factor correction module further includes an electrolytic capacitor disposed at an output end of the power factor correction module, the electrolytic capacitor being configured to receive the pulsating dc signal and convert the pulsating dc signal into a dc signal, and an inverter connected to the output end of the electrolytic capacitor, the inverter being configured to control the dc signal to supply power to a load.
In the technical scheme, the electrolytic capacitor is arranged at the output end of the half-bridge circuit, , the electrolytic capacitor can provide the electric quantity for load operation, , the electrolytic capacitor can absorb surge signals contained in the driving control circuit, can further reduce electromagnetic interference signals and noise flowing to the inverter, and the reliability of load operation is improved.
If the inverter comprises two half-bridge circuits connected in parallel, the inverter can drive a single-phase load to operate, and if the inverter comprises three half-bridge circuits connected in parallel, the inverter can drive a three-phase load to operate.
In any above technical solution, optionally, a value of the capacitance of the electrolytic capacitor ranges from 10uF to 20000 uF.
In any above technical solution, optionally, the power supply circuit further includes a power detection module connected to the second input line, where the power detection module is configured to detect a power supply amount of the power supply signal to the load, and the power supply amount is used to adjust a conduction 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, there are provided kinds of household electrical appliances, including a load, and a driving control circuit according to any item in the aspect of the present invention, the driving control circuit is configured to control a power supply signal to supply power to the 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 of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer mainframe.
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 of embodiments of the prior art;
FIG. 2 shows a schematic diagram of another embodiments of a drive control circuit in the prior art;
fig. 3 shows a schematic diagram of drive control circuits according to embodiments of the invention;
fig. 4 shows a schematic diagram of a drive control circuit according to another embodiments of the present invention;
fig. 5 shows a schematic diagram of a drive control circuit according to another embodiments of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings, which are not intended to limit the scope of the invention, but which are illustrated in the appended drawings.
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 5.
As shown in fig. 1, after the Power supply signal AC is input to the drive control circuit, an inductor L, a totem-pole PFC (Power Factor Correction) module, and an electrolytic capacitor are generally usedThe capacitor E and the inverter constitute a drive control circuit of a motor (load), and a large number of switching tubes ( th switching tube Q) are usually arranged in a totem-pole PFC module1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4) In addition, a hall sensor S is provided in the charging circuit of the inductor L, and a current is detected based on the hall sensor S.
As shown in fig. 1, the th switching tube Q1Between the source and drain of the transistor is an th reverse freewheeling diode D1A second switch tube Q2Between the source and the drain of the first diode and a second reverse freewheeling diode D is arranged2A third switching tube Q3Is provided with a third reverse freewheeling diode D between the source and the drain3Fourth switch tube Q4Is provided with a fourth reverse freewheeling diode D between the source and the drain4。
As shown in fig. 2, the controller is connected to the driver and drives the switch transistor to be turned on or off through the driver, for example, the th switch transistor Q1Is connected to the th resistor R between the gate and the driver1(mainly for current and voltage limiting), th switch tube Q1A second resistor R is connected between the grid electrode and the source electrode2(mainly for drive conduction), the second switch tube Q2Is connected to a third resistor R between the gate and the driver3(mainly for current and voltage limiting), a second switch tube Q2A fourth resistor R is connected between the grid electrode and the source electrode4(mainly for driving conduction).
As shown in fig. 3, 4 and 5, in a totem-pole PFC (Power Factor Correction) module, if the switching tube is an N-type MOSFET, the peak current I generated by the parasitic capacitancedgSwitch tube Q of th1At the initial time of conduction, the second switch tube Q2In the off state, the miller effect causes the second switch tube Q in the half-bridge circuit2The control end generates peak voltage which reaches the second switch tube Q2The conduction of will result in the second switch tube Q2Conducting to result in the th switch tube Q1And a second switching tube Q2Are simultaneously conducted to sendShort circuit damage occurs.
As shown in FIGS. 3, 4 and 5, the driving control circuits according to the present invention include a half-bridge circuit 100, the half-bridge circuit 100 is connected to a bus circuit, the half-bridge circuit 100 is configured to perform conversion processing on a power supply signal, each bridge arm of the half-bridge circuit 100 specifically includes a switching tube configured to have a control end, and a clamping unit 200, the clamping unit 200 is configured to limit a voltage value of the control end of the switching tube, wherein a th switching tube Q in the half-bridge circuit 1001At the initial moment of conduction, triggering the second switch tube Q in the half-bridge circuit 1002A spike voltage occurs at the control terminal, which can be attenuated by the clamping unit 200.
In this solution, for the half-bridge circuit 100 with at least two switching tubes, the parasitic capacitance C exists between the control end and the output end of the switching tubedgParasitic capacitance CdgThe voltage interference between the two switching tubes can be caused under the amplification effect of the switching tubes, and the switching tubes and the corresponding clamping units 200 are arranged in the half-bridge circuit 100, and the clamping units 200 are arranged to limit the voltage values of the control ends of the switching tubes, so that the peak voltage can be effectively absorbed, the possibility that the peak voltage leads to the through connection of the half-bridge circuit is reduced, and the reliability and the stability of the half-bridge circuit 100 are further improved.
Specifically, the th switch tube Q in the half-bridge circuit 1001At the initial time of conduction, the second switch tube is in the off state, and the miller effect will cause the second switch tube Q in the half-bridge circuit 1002The control end generates peak voltage which reaches the second switch tube Q2The conduction of is limited to a threshold value, which results in the conduction of the second switch tube and the conduction of the th switch tube Q1And a second switching tube Q2And at the same time, short circuit damage occurs.
Wherein the clamping unit 200 includes a capacitive element C0Resistive element and switching device T0At least , and the terminal of the clamp cell 200 is connected to the control terminal at the absorption endWhen the peak voltage appears at the control end, the conduction time of the switch tube is prolonged, and meanwhile, the power consumption of the switch tube is favorably reduced.
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 above technical solution, optionally, the switch tube further has a end and a second end, when the switch tube is turned on, a current flows from the end to the second end, a bias resistor is connected between the control end and the second end, and when a turn-on signal is input to the control end, a divided voltage of the bias resistor is greater than a turn-on voltage threshold of the switch tube.
In this technical solution, the th end of the switch tube is denoted as an output end, the control end is an input end of the switch tube, and the bias resistor is connected between the second end and the control end, so that the PN junction between the gate and the source can be turned on by the voltage division of the bias resistor, which is beneficial to improving the reliability of the on signal input to the control end.
In any of the above, the clamping unit 200 further optionally includes a capacitive element C0Connected in series between the control terminal and the second terminal of the switching tube, the capacitive element C0Is configured to bleed off the spike voltage.
In this embodiment, the clamp unit 200 includes a capacitive element C0And a capacitive element C0A capacitive element C connected in series between the control terminal and the second terminal0The release of the peak voltage is equivalent to the parasitic capacitance CdgThe stored power is neutralized to reduce the miller effect in the half-bridge circuit 100, which is beneficial to improving the reliability of the half-bridge circuit 100.
In any of the solutions above, optionally, the clamping unit 200 includes a switching device T0Said switching device T0Is connected to the control terminal, and the second terminal of the switching device T0 is connected to the second terminal of the switching tube, so that when the spike voltage is generated at the control terminal of the switching tube, the switching device T generates the spike voltage0Is conducted to dischargeA spike voltage.
In the technical scheme, a switching device T is arranged0Connected between the control terminal and the second terminal, and further connected between the parasitic capacitor CdgTo the capacitive element C0When the electricity is discharged, the switch device T0And can be in a conducting state to improve the efficiency of discharging the spike voltage, and is added to improve the reliability of the half-bridge circuit 100.
, in order to lift the switching device T, as shown in FIGS. 4 and 50Reliability of the switching device T0Is connected into a current limiting resistor R02。
In any above technical solution, optionally, the circuit further includes a driver, an output terminal of the driver is connected to the control terminal of the switching tube, a th switching resistor connected in series between the control terminal of the switching tube and the output terminal of the driver, and a second switching resistor R connected in series01And a one-way conduction element D0And the unidirectional conducting element D is connected with the th switch resistor in parallel, wherein when the driver outputs the conducting signal to the control end of the switch tube, the unidirectional conducting element D is connected with the unidirectional conducting element D0When the on signal is transmitted to the control end of the switch tube through the th switch resistor, and the driver outputs an off signal to the control end of the switch tube, the one-way conduction element D0On, the off signal passes through the th switch resistor and the second switch resistor R01And transmitting the signal to the control end of the switching tube.
In this embodiment, the driver, the th switching resistor, and the second switching resistor R are arranged as described above01And a one-way conduction element D0When the on signal is transmitted to the control terminal, only the th switch resistor is passed through, and when the off signal is transmitted to the control terminal, the th switch resistor, the second switch resistor R01And a one-way conduction element D0Meanwhile, the switching-on is conducted, so that the transmission speed of the cut-off signal is higher than that of the conduction signal, the reliability of overcurrent protection of the switching tube is improved, and in addition, the peak signal can also pass through the th switching resistor and the second switching resistor R01And is in one-way conductionComponent D0The voltage is released to the clamping unit 200 quickly, so that is facilitated to reduce the impact of the spike voltage on the switch tube and reduce the response time and power consumption of the switch tube.
Wherein, the th switch resistor comprises a th switch tube Q1Between the gate and the driver1The th switch resistor further comprises a second switch tube Q2Between the gate and the driver3。
In any above technical solution, optionally, the apparatus further includes a bridge module, where the bridge module includes two half-bridge circuits 100 connected in parallel, and if an input end of the bridge module is connected to an ac signal, an output end of the bridge module outputs a dc signal, and if an input end of the bridge module is connected to a dc signal, an output end of the bridge module outputs an ac signal.
In this technical solution, the switching tube is turned on and off to convert the power supply signal, and usually, the input ac signal is converted into a dc signal, or the input dc signal is converted into an ac signal to drive the load to operate reliably.
In any of the technical solutions, optionally, the power factor correction module further includes two parallel half-bridge circuits 100, and the switching tubes of the four bridge arms of the power factor correction module are sequentially denoted as a th switching tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4The th switch tube Q1And the second switching tube Q2The common end between the three is connected with the th input line of the power supply signal, and the third switching tube Q3And the fourth switching tube Q4A second input line of the power supply signal is connected to the common terminal, and the th switching tube Q1And the fourth switching tube Q4The common end between the two is connected with a high-voltage bus corresponding to the pulsating direct current signal, and the second switching tube Q2And the third switch tube Q3The 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 100 connected in parallel, and four bridge arms are all provided with a switch tube, that is, a totem-pole PFC (Power Factor Correction) module is formed, optionally, an upper switch tube in the half-bridge circuit 100 is an NPN-type triode, a lower switch tube is a PNP-type triode, and the upper switch tube and the lower switch tube are connected by a common emitter, and the emitter is also output ends of the totem-pole PFC module.
Alternatively, 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 switching tube or a GaN switching tube, so that the switching frequency of the switching tube may be further increased by , and although the load operation energy efficiency may be further increased by , the electromagnetic interference signal is stronger, which requires a filter 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 technical solution above, 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 terminal 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 terminal of the controller, and a reverse freewheel diode is connected between an emitter and a collector of the insulated gate bipolar transistor.
In any technical solution above, optionally, the power factor correction module further includes an electrolytic capacitor disposed at an output end of the power factor correction module, the electrolytic capacitor being configured to receive the pulsating dc signal and convert the pulsating dc signal into a dc signal, and an inverter connected to the output end of the electrolytic capacitor, the inverter being configured to control the dc signal to supply power to a load.
In the technical scheme, the electrolytic capacitor is arranged at the output end of the half-bridge circuit 100, and in the aspect of , the electrolytic capacitor can provide the electric quantity for load operation, and in addition, in the aspect of , the electrolytic capacitor can also absorb surge signals contained in the driving control circuit, so that the electromagnetic interference signals and noise flowing to the inverter can be further reduced by , and the reliability of load operation is favorably improved.
If the inverter includes two half-bridge circuits 100 connected in parallel, the inverter can drive a single-phase load to operate, and if the inverter includes three half-bridge circuits 100 connected in parallel, the inverter can drive a three-phase load to operate.
In any above technical solution, optionally, a value of the capacitance of the electrolytic capacitor E ranges from 10uF to 20000 uF.
In any above technical solution, optionally, the power supply control circuit further includes a power quantity detection module S connected to the second input line, where the power quantity detection module S is configured to detect a power supply quantity of the power supply signal AC to the load, and the power supply quantity is used to adjust a conduction frequency of the switching tube.
In this technical solution, the power detection module S is connected to the second input line, so as to detect the power supply signal AC, and adjust the switching frequency according to the detection result, for example, when detecting that the current in the power supply signal AC carries more peak signals, to avoid the peak signals from being amplified and superimposed by the half-bridge circuit 100, the switching frequency may be reduced to reduce the electromagnetic interference signals and the peak signals.
To the technical problem who exists among the prior art, the utility model provides an kinds of drive control circuit and tame electric installation, through set up switch tube and corresponding clamping unit in half-bridge circuit to set up the clamping unit restriction the voltage value of the control end of switch tube can absorb spike voltage effectively, leads to the straight-through possibility of half-bridge circuit with reduction spike voltage, and then has promoted half-bridge circuit's reliability and stability.
Furthermore, the present invention may take the form of a computer program product embodied on or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present invention is 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 is understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions which are provided to a controller of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce machines, such that the instructions, which execute via the controller 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.
The present invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer, in a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware, the use of the words , second and third, etcetera do not indicate any order, and these words may be interpreted as names.
Having thus described the preferred embodiments of the present invention, additional variations and modifications of these embodiments may occur to those skilled in the art upon learning of the basic inventive concepts .
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:
the half-bridge circuit is connected into the bus circuit, and is configured to perform conversion processing on a power supply signal, and each bridge arm of the half-bridge circuit specifically includes:
a switching tube configured to have a control end;
the clamping unit is configured to limit the voltage value of the control end of the switching tube, wherein th switching tube in the half-bridge circuit triggers the control end of the second switching tube in the half-bridge circuit to generate a spike voltage at the initial moment of conduction, and the spike voltage can be weakened by the clamping unit.
2. The drive control circuit according to claim 1,
the switch tube is further provided with an th end and a second end, when the switch tube is switched on, current flows to the second end from the th end, a bias resistor is connected between the control end and the second end, and when a switching-on signal is input to the control end, the partial pressure of the bias resistor is greater than the switching-on voltage threshold of the switch tube.
3. The drive control circuit according to claim 2, wherein the clamping unit includes:
a capacitive element connected in series between the control terminal of the switching tube and the second terminal of the switching tube, the capacitive element configured to bleed off the spike voltage.
4. The drive control circuit according to claim 1, wherein the clamping unit includes:
and the th end of the switching device is connected to the control end, the second end of the switching device is connected to the second end of the switching tube, and the switching device is conducted to discharge the spike voltage when the spike voltage is generated at the control end of the switching tube.
5. The drive control circuit according to claim 1, further comprising:
the output end of the driver is connected to the control end of the switch tube;
switch resistor connected in series between the control end of the switch tube and the output end of the driver;
a second switch resistance and a unidirectional conducting element connected in series, connected in parallel with said th switch resistance,
when the driver outputs the conducting signal to the control end of the switch tube, the one-way conducting element is cut off, and the conducting signal is transmitted to the control end of the switch tube through the th switch resistor,
and when the driver outputs a cut-off signal to the control end of the switching tube, the one-way conduction element is conducted, and the cut-off signal is transmitted to the control end of the switching tube through the th switching resistor and the second switching resistor.
6. 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,
and if the input end of the bridge module is connected with the direct current signal, the output end of the bridge module outputs an alternating current signal.
7. The drive control circuit according to claim 1, 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 an th switching tube, a second switching tube, a third switching tube and a fourth switching tube, a common end between the th switching tube and the second switching tube is connected to a th input line of the power supply signal, a common end between the third switching tube and the fourth switching tube is connected to a second input line of the power supply signal,
and a common end between the th switching tube and the fourth switching tube is connected with a high-voltage bus corresponding to the pulsating direct current signal, and a common end between the second switching tube and the third switching tube is connected with a low-voltage bus corresponding to the pulsating direct current signal.
8. The drive control circuit of of any of claims 1-7,
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 7, characterized by further comprising:
the electrolytic capacitor is arranged at the output end of the power factor correction module 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.
10. The drive control circuit according to claim 9,
the capacitance value range of the electrolytic capacitor is 10 uF-20000 uF.
11. The drive control circuit according to claim 7, characterized by further comprising:
and the electric quantity detection module is connected into the second input circuit and is configured to detect the power supply quantity of the power supply signal to a load, and the power supply quantity is used for adjusting the conduction frequency of the switching tube.
12, a household appliance, comprising:
a load;
the drive control circuit of any of claims 1-11, configured to control a supply signal to supply power to the load.
13. The home device of claim 12,
the household appliances comprise at least of air conditioner, refrigerator, fan, smoke exhaust ventilator, dust collector and computer host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045868.8U CN210007616U (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045868.8U CN210007616U (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household electrical appliance |
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| CN210007616U true CN210007616U (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233566A (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 |
| CN112737425A (en) * | 2020-12-25 | 2021-04-30 | 兰州飞行控制有限责任公司 | Direct current brushless motor drive circuit based on CPLD control |
-
2019
- 2019-07-05 CN CN201921045868.8U patent/CN210007616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233566A (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 |
| CN112737425A (en) * | 2020-12-25 | 2021-04-30 | 兰州飞行控制有限责任公司 | Direct current brushless motor drive circuit based on CPLD control |
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