CN110299824A - Drive control circuit and household appliance - Google Patents
Drive control circuit and household appliance Download PDFInfo
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- CN110299824A CN110299824A CN201910606338.4A CN201910606338A CN110299824A CN 110299824 A CN110299824 A CN 110299824A CN 201910606338 A CN201910606338 A CN 201910606338A CN 110299824 A CN110299824 A CN 110299824A
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- switching tube
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- mould group
- bridge circuit
- drive control
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- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 19
- 239000004065 semiconductor Substances 0.000 claims description 17
- 229910044991 metal oxide Inorganic materials 0.000 claims description 15
- 150000004706 metal oxides Chemical class 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 230000010349 pulsation Effects 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 12
- 230000003071 parasitic effect Effects 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 238000012937 correction Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000012421 spiking Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 230000002459 sustained effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
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- 239000013078 crystal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
- H03K17/6872—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor using complementary field-effect transistors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of drive control circuit and household appliances, wherein, drive control circuit includes: half-bridge circuit, half-bridge circuit accesses in bus circuit, half-bridge circuit is configured as carrying out conversion process to power supply signal, half-bridge circuit specifically includes: switching tube, and switching tube is configured with control terminal；Hall sensor, the Hall sensor are configured as sampling power supply signal, to obtain corresponding sampled signal；Compare mould group, the first input end for comparing mould group is configured as access reference signal, the second input terminal for comparing mould group is configured as the corresponding sampled signal of access electric signal, wherein, the output end for comparing mould group is connected to the control terminal of switching tube, if the absolute value of sampled signal is greater than reference signal, compares mould group to switching tube and export pick-off signal.According to the technical solution of the present invention, the overcurrent protection to functional circuit is realized, the impact of overcurrent switch tube is avoided, is conducive to the reliability for promoting drive control circuit and household appliance.
Description
Technical field
The present invention relates to drive control fields, in particular to a kind of drive control circuit and a kind of household appliance.
Background technique
Convertible frequency air-conditioner market at present generallys use rectifier, inductor, PFC (Power to promote load running efficiency
Factor Correction, PFC) mould group, the drive control of electrolytic capacitor and inverter composition motor (load)
Circuit.
In the related technology, in order to reduce the power consumption of BOOST type PFC and the power consumption of rectifier, using totem pole type PFC mould group
BOOST type PFC and rectifier are substituted, still, in order to further improve the efficiency of circuit, totem pole type PFC is usually set
At least one half-bridge circuit in mould group keeps high-frequency work.
Specifically, as shown in Figure 1, using inductor L, totem pole type PFC (Power Factor Correction, power
Factor correcting) mould group, the drive control circuit of electrolytic capacitor E and inverter composition motor (load), above-mentioned drive control circuit
At least there is following technological deficiency in the process of running:
(1) since a large amount of switching tubes (first switch tube Q is usually arranged in totem pole type PFC mould group1, second switch Q2、
Third switching tube Q3With the 4th switching tube Q4), and switching tube is worked with high-frequency mode, this this may result in drive control circuit
Generate a large amount of higher hamonic wave.
(2) based on Miller effect it is found that the intrinsic parasitic capacitance of switching tube can generate a large amount of peak voltages, peak current and
Power consumption, this can seriously affect totem pole type PFC mould group, the reliability of drive control circuit and household appliance.
In addition, any discussion of the whole instruction to background technique, not representing the background technique must be fields
The prior art that technical staff is known, not representing in the whole instruction to any discussion of the prior art think that this is existing
Technology must be widely known or certain common knowledge for constituting this field.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, an object of the present invention is to provide a kind of drive control circuits.
Yet another object of the invention is that proposing a kind of household appliance.
In the technical solution of the first aspect of the present invention, a kind of drive control circuit is proposed, comprising: half-bridge circuit,
In bus circuit, the half-bridge circuit is configured as carrying out conversion process to power supply signal, described for the half-bridge circuit access
Half-bridge circuit specifically includes: switching tube, and the switching tube is configured with control terminal；The Hall sensor is configured as pair
Power supply signal is sampled, to obtain corresponding sampled signal；Compare mould group, the first input end of the relatively mould group is configured
To access reference signal, the second input terminal of the relatively mould group is configured as accessing the corresponding sampled signal of the electric signal,
Wherein, the output end of the relatively mould group is connected to the control terminal of the switching tube, if the absolute value of the sampled signal is greater than
The reference signal, then the relatively mould group exports pick-off signal to the switching tube.
In the technical scheme, for being equipped with the half-bridge circuit of at least two switching tubes, due to the control of switching tube
There are parasitic capacitance between end and output end, parasitic capacitance can cause under the amplification of switching tube between two switching tubes
Voltage disturbance, for example, second switch (being denoted as lower switch pipe) begin to turn on moment, and the parasitic capacitance of lower switch pipe generates one
Peak voltage, this peak voltage impact first switch tube in the form of peak current, it is possible to first switch tube be caused (to be denoted as
Upper switch pipe) it is breakdown, and then lead to half-bridge circuit failure, therefore, by the way that Hall sensor and ratio are arranged in half-bridge circuit
Compared with mould group, overcurrent protection and overvoltage protection are carried out with switch tube, parasitic capacitance and power supply signal can not only be reduced to half-bridge
It is impacted caused by circuit, and can reduce the power consumption of half-bridge circuit, in addition, due to not needing that isolation electricity is arranged for half-bridge circuit
Road also reduces the cost of drive control circuit, and then improves the reliability and stability of drive control circuit.
Wherein, the output end for comparing mould group is connected to the control terminal of the switching tube, if the absolute value of the sampled signal
Greater than the reference signal, then the relatively mould group exports pick-off signal to the switching tube, especially in overcurrent protection or mistake
When pressure protection, needs not move through driver and come the cut-off of trigger switch pipe, the possibility that can further avoid switching tube breakdown
Property.
In addition, being sampled by the way that Hall sensor is arranged to the electric signal for flowing through the half-bridge circuit, and sampling is tied
Fruit is transferred to driver, and is adjusted according to testing result to switching frequency, for example, is detecting the electric current in power supply signal
It, can be by reducing switch frequency in order to avoid spiking amplifies and is superimposed by half-bridge circuit when carrying more spiking
Rate reduces electromagnetic interference signal and spiking.
In addition, drive control circuit according to the above embodiment of the present invention, can also have the following additional technical features:
In any of the above-described technical solution, optionally, the conducting voltage of switching tube is greater than zero, and the relatively mould group is also wrapped
Include: the positive input terminal of first comparator, the first comparator accesses the first reference signal, the negative input of the first comparator
It terminates into the sampled signal, the output end of the first comparator is connected to the control terminal of the switching tube；And/or second
Comparator, the negative input end of second comparator access the second reference signal, the positive input terminal access of second comparator
The output end of the sampled signal, second comparator is connected to the control terminal of the switching tube, wherein the reference signal
For first reference signal or second reference signal.
In the technical scheme, the conducting voltage of switching tube is greater than zero, i.e. switching tube is N-type MOS field
Effect transistor or NPN type triode, the driving signal of control terminal (grid or base stage) are connected when being high level.
Further, the size that first comparator is used to compare between the sampled signal of positive axis and the first reference signal is closed
System, according to above-mentioned connection type it is found that first comparator exports low level if positive sampled signal is greater than the first reference signal
Signal, similarly, the second comparator are used for the size relation between the sampled signal and the second reference signal of more negative semiaxis, according to
For above-mentioned connection type it is found that if negative sampled signal is less than the second reference signal, the second comparator exports low level signal, low
Level signal is transmitted to the control terminal of switching tube (N-type Metal Oxide Semiconductor Field Effect Transistor or NPN type triode), i.e.,
Switching tube cut-off is directly controlled as pick-off signal.
To sum up, as long as the amplitude of sampled signal is greater than reference signal, compare mould group and cut to the output of the control terminal of switching tube
Stop signal improves the reliability of overcurrent protection (or overvoltage protection) with direct on-off switching tube, shorten overcurrent protection (or
Overvoltage protection) response time.
In any of the above-described technical solution, optionally, further includes: one-way conduction element, the one-way conduction element series connection
Between the relatively output end of mould group and the control terminal of the switching tube, the one-way conduction element is configured as will be described
Pick-off signal is one-way transmitted to the control terminal of the switching tube.
In the technical scheme, one-way conduction member is accessed by the control terminal of output end and switching tube in relatively mould group
Part, only when relatively mould group exports pick-off signal, one way conducting device conducting namely direct on-off switching tube, and do not exporting
When pick-off signal, the control terminal of switching tube receives the control signal of driver, and according to control signal conduction or cut-off.
In any of the above-described technical solution, optionally, each bridge arm of the half-bridge circuit includes opening described at least one
Guan Guan, if the input terminal of the half-bridge circuit accesses power supply signal, the output end of the half-bridge circuit exports direct current signal, if
The input terminal of the half-bridge circuit accesses direct current signal, then the output end of the half-bridge circuit exports power supply signal.
In the technical scheme, include at least one switching tube by each bridge arm that half-bridge circuit is arranged, pass through switch
The on and off of pipe realizes the conversion process of power supply signal, and the power supply signal of input is usually converted to direct current signal,
Or the direct current signal of input is converted into power supply signal and then load is driven reliably to run.
In any of the above-described technical solution, optionally, further includes: PFC mould group, the PFC
Mould group includes two half-bridge circuits in parallel, is denoted as the first half-bridge circuit and the second half-bridge circuit respectively；Driver, it is described
Driver is connected to the output end of the Hall sensor, if the driver detects that the power supply signal is greater than bus electricity
Pressure, and the sampled signal be greater than or equal to preset voltage threshold, and the input current of second half-bridge circuit be greater than or
Equal to preset current threshold, then the driver exports pulse drive signal to first half-bridge circuit, wherein the arteries and veins
It rushes driving signal and is configured as controlling two switching tube alternate conductions in first half-bridge circuit.
In the technical scheme, the size of current in power supply signal is acquired by Hall sensor, and by comparing determining
Drive power supply signal be greater than busbar voltage, and sampled signal be greater than or equal to voltage threshold when and the second half-bridge circuit it is defeated
Enter electric current more than or equal to preset current threshold, the first half-bridge circuit of control is started to work, namely is come with pulse drive signal
The work of the first half-bridge circuit is controlled, usual first half-bridge circuit is worked with high frequency mode, and switching frequency is greater than 1KHz, to reduce electricity
The impact of road abnormality switch tube.
Wherein, PFC mould group includes two half-bridge circuits in parallel, and is equipped with switching tube in four bridge arms,
Constitute totem pole type PFC (Power Factor Correction, PFC) mould group, optionally, half-bridge circuit
In upper switch pipe be NPN type triode, lower switch pipe is PNP type triode, and upper switch pipe and lower switch pipe are transmitting altogether
Pole connection, emitter is also an output end of above-mentioned totem pole type PFC mould group.
Optionally, the value range of voltage threshold is 0~200V, 0~10A of threshold value value of current threshold.
Alternatively it is also possible to set MOSFET (Metal-Oxide- for the switching tube in totem pole type PFC mould group
Semiconductor Field Effect Transistor, Metal Oxide Semiconductor Field Effect Transistor), switching tube
It can be SiC-type switching tube or GaN type switch tube, therefore, the switching frequency of switching tube can be promoted further, although can
Load running efficiency is further promoted, still, electromagnetic interference signal is stronger, this just needs that filter module is added to reduce electromagnetism
Interference signal.
Optionally, it is integrated between the source electrode (emitter) of the switching tube of above-mentioned totem pole type PFC and drain electrode (collector)
Reversed freewheeling diode.
In any of the above-described technical solution, optionally, first half-bridge circuit includes first switch tube and second switch
Pipe, second half-bridge circuit include third switching tube and the 4th switching tube, the first switch tube and the second switch
Between common end access the first line of the power supply signal, the public affairs between the third switching tube and the 4th switching tube
It is terminated altogether into the common end between the second route of the power supply signal and the first switch tube and the 4th switching tube
The high voltage bus in the bus circuit is accessed, institute is accessed in the common end between the second switch and the third switching tube
State low-voltage bus bar, wherein when the power supply signal is positive half-wave signal, the conducting of third switching tube described in the driver control,
Meanwhile the 4th switching tube described in the driver control end, the power supply signal be negative half-wave signa when, the driver control
The third switching tube cut-off is made, meanwhile, the conducting of the 4th switching tube described in the driver control.
In any of the above-described technical solution, optionally, the switching tube is Metal Oxide Semiconductor Field Effect Transistor
Or insulated gate bipolar transistor, wherein the grid of the Metal Oxide Semiconductor Field Effect Transistor is connected to controller
Instruction output end, access reversed two pole of afterflow between the source electrode and drain electrode of the Metal Oxide Semiconductor Field Effect Transistor
Pipe, the base stage of the insulated gate bipolar transistor are connected to the instruction output end of controller, the insulated gate bipolar crystal
Reversed freewheeling diode is accessed between the emitter and collector of pipe.
Wherein, Metal Oxide Semiconductor Field Effect Transistor can imitate for depletion mode fet or enhanced field
Transistor is answered, also can choose SiC transistor or GaN transistor.
In any of the above-described technical solution, optionally, further includes: electrolytic capacitor is set to the PFC mould group
Output end, the electrolytic capacitor is configured as receiving the pulsating direct current signal and is converted to direct current signal；Inverter, connection
To the output end of the electrolytic capacitor, the inverter is configured as controlling the direct current signal to load supplying.
In the technical scheme, electrolytic capacitor is arranged by the output end in half-bridge circuit, on the one hand, electrolytic capacitor can
The electricity of load running is provided, on the other hand, electrolytic capacitor can also absorb the surging signal for including in drive control circuit, can
The electromagnetic interference signal and noise for flowing to inverter are further reduced, the reliability for promoting load running is conducive to.
Wherein, if inverter includes two half-bridge circuits in parallel, single-phase load can be driven to run, if inverter packet
Three half-bridge circuits in parallel are included, then threephase load can be driven to run.
In any of the above-described technical solution, optionally, the capacitance value range of the electrolytic capacitor be 10uF~
20000uF。
In the technical solution of the second aspect of the present invention, a kind of household appliance is proposed, comprising: load；Such as the present invention
Any one of first aspect technical solution described in drive control circuit, the dynamic control circuit is configured control for telecommunications
Number to load supplying.
In the technical scheme, household appliance includes drive control circuit as described in the above technical scheme, therefore, should
Household appliance includes whole beneficial effects of drive control circuit as described in the above technical scheme, is repeated no more again.
In the above-mentioned technical solutions, optionally, the household appliance include air conditioner, refrigerator, fan, smoke exhaust ventilator,
At least one of dust catcher and host computer.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the schematic diagram of the drive control circuit of one embodiment in the prior art；
Fig. 2 shows the timing diagrams of drive control circuit according to an embodiment of the invention；
Fig. 3 shows the schematic diagram of drive control circuit according to an embodiment of the invention；
Fig. 4 shows the schematic diagram of drive control circuit according to another embodiment of the invention；
Fig. 5 shows the schematic diagram of drive control circuit according to another embodiment of the invention；
Fig. 6 shows the schematic diagram of drive control circuit according to another embodiment of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
It is carried out below with reference to drive control circuit and household appliance of the Fig. 1 to Fig. 5 to embodiment according to the present invention specific
Explanation.
As shown in Figure 1, generalling use inductor L, totem pole type PFC after power supply signal AC input to drive control circuit
(Power Factor Correction, PFC) mould group, electrolytic capacitor E and inverter constitute motor (load)
Drive control circuit, since a large amount of switching tubes (first switch tube Q is usually arranged in totem pole type PFC mould group1, second switch
Q2, third switching tube Q3With the 4th switching tube Q4), in addition, Hall sensor S is arranged in the charge circuit of inductor L, it is based on
Hall sensor S detects electric current.
As shown in Figure 1, first switch tube Q1Source electrode and drain electrode between be equipped with the first reversed sustained diode1, second opens
Close pipe Q2Source electrode and drain electrode between be equipped with the second reversed sustained diode2, third switching tube Q3Source electrode and drain electrode between set
There is the reversed sustained diode of third3, the 4th switching tube Q4Source electrode and drain electrode between be equipped with the 4th reversed sustained diode4。
As shown in Fig. 2, totem pole type PFC (Power Factor Correction, PFC) mould group is usually pressed
It works according to following mode:
(1) in T0~T3In period, it is denoted as alternating voltage USPositive half cycle waveform, controller is to first switch tube Q1With
Two switching tube Q2Export pulse drive signal, first switch tube Q1Duty ratio be variable numerical value (by it is small increase or by becoming greatly
It is small) or preset definite value, first switch tube Q1Turn-on time and second switch Q2Turn-on time it is complementary, third switching tube
Q3Conducting, and the 4th switching tube Q4Cut-off.
(2) in T3~T6In period, it is denoted as alternating voltage USNegative half period waveform, controller is to first switch tube Q1With
Two switching tube Q2Export pulse drive signal, first switch tube Q1Duty ratio be variable numerical value (by it is small increase or by becoming greatly
It is small) or preset definite value, first switch tube Q1Turn-on time and second switch Q2Turn-on time it is complementary, third switching tube
Q3Cut-off, and the 4th switching tube Q4Conducting.
As shown in figure 3, in totem pole type PFC (Power Factor Correction, PFC) mould group,
If switching tube is N-type MOSFET, parasitic capacitance CdgThe peak current I of generationdgDirection is flowed to by grid and is drained, second switch
Pipe Q2Peak current will lead to first switch tube Q1Grid generate peak voltage, this peak voltage may puncture first and open
Close pipe Q1。
Wherein, controller is connected to driver, and by driver driving switch pipe on or off, for example, first is opened
Close pipe Q1Grid and driver between access first resistor R1(being mainly used for current limliting and partial pressure), first switch tube Q1Grid
Second resistance R is accessed between source electrode2(being mainly used for driving conducting), second switch Q2Grid and driver between access
3rd resistor R3(being mainly used for current limliting and partial pressure), second switch Q2Grid and source electrode between access the 4th resistance R4It is (main
It is connected for driving).
As shown in Figure 4, Figure 5 and Figure 6, drive control circuit according to an embodiment of the invention, comprising: half-bridge circuit
100, in bus circuit, the half-bridge circuit 100 is configured as turning power supply signal AC for the access of half-bridge circuit 100
Processing is changed, the half-bridge circuit 100 specifically includes: switching tube, the switching tube are configured with control terminal；Hall sensor
S, the Hall sensor S are configured as sampling power supply signal AC, to obtain corresponding sampled signal；Compare mould group,
The first input end of the relatively mould group is configured as access reference signal, and the second input terminal of the relatively mould group is configured as
Access the corresponding sampled signal of the electric signal, wherein the output end of the relatively mould group is connected to the control of the switching tube
End, if the absolute value of the sampled signal is greater than the reference signal, the relatively mould group is exported to the switching tube ends
Signal.
In the technical scheme, for being equipped with the half-bridge circuit 100 of at least two switching tubes, due to the control of switching tube
There are parasitic capacitance C between end processed and output enddg, parasitic capacitance CdgIt can cause two switches under the amplification of switching tube
Voltage disturbance between pipe, for example, second switch Q2(being denoted as lower switch pipe) begins to turn on moment, the parasitism electricity of lower switch pipe
Hold CdgA peak voltage is generated, this peak voltage impacts first switch tube Q in the form of peak current1, it is possible to cause
First switch tube Q1(being denoted as upper switch pipe) is breakdown, and then leads to 100 failure of half-bridge circuit, therefore, by half-bridge circuit
Hall sensor S is set in 100 and compares mould group, overcurrent protection and overvoltage protection are carried out with switch tube, can not only be reduced
Parasitic capacitance CdgIt is impacted with power supply signal AC to caused by half-bridge circuit 100, and can reduce the power consumption of half-bridge circuit 100,
In addition, also reducing the cost of drive control circuit, and then promoted due to not needing that isolation circuit is arranged for half-bridge circuit 100
The reliability and stability of drive control circuit.
Wherein, the output end for comparing mould group is connected to the control terminal of the switching tube, if the absolute value of the sampled signal
Greater than the reference signal, then the relatively mould group exports pick-off signal to the switching tube, especially in overcurrent protection or mistake
When pressure protection, needs not move through driver and come the cut-off of trigger switch pipe, the possibility that can further avoid switching tube breakdown
Property.
In addition, being sampled by the way that Hall sensor S is arranged to the electric signal for flowing through the half-bridge circuit 100, and will adopt
Sample result is transferred to driver, and is adjusted according to testing result to switching frequency, for example, in detecting power supply signal AC
Electric current carry more spiking when, in order to avoid spiking by half-bridge circuit 100 amplify and be superimposed, drop can be passed through
Low switching frequency reduces electromagnetic interference signal and spiking.
Optionally, the sample frequency range of Hall sensor S is 1KHz~1000MHz, and sampled signal is also used for electric current loop
Closure control.
In addition, drive control circuit according to the above embodiment of the present invention, can also have the following additional technical features:
In any of the above-described technical solution, optionally, the conducting voltage of switching tube is greater than zero, and the relatively mould group is also wrapped
It includes: first comparator C1, the first comparator C1Positive input terminal access the first reference signal B1, the first comparator C1
Negative input end access the sampled signal, the first comparator C1Output end be connected to the control terminal of the switching tube；
And/or the second comparator C2, the second comparator C2Negative input end access the second reference signal B2, second comparator
C2Positive input terminal access the sampled signal, the second comparator C2Output end be connected to the control terminal of the switching tube,
Wherein, the reference signal is the first reference signal B1Or the second reference signal B2。
In the technical scheme, the conducting voltage of switching tube is greater than zero, i.e. switching tube is N-type MOS field
Effect transistor or NPN type triode, the driving signal of control terminal (grid or base stage) are connected when being high level.
As shown in fig. 6, first comparator C1For comparing the sampled signal and the first reference signal B of positive axis1Between it is big
Small relationship, according to above-mentioned connection type it is found that if positive sampled signal is greater than the first reference signal B1, then first comparator C1It is defeated
Low level signal out, similarly, the second comparator C2Sampled signal and the second reference signal B for more negative semiaxis2Between it is big
Small relationship, according to above-mentioned connection type it is found that if negative sampled signal is less than the second reference signal B2, then the second comparator C2It is defeated
Low level signal out, low level signal are transmitted to switching tube (N-type Metal Oxide Semiconductor Field Effect Transistor or NPN type three
Pole pipe) control terminal, i.e., as pick-off signal directly control switching tube cut-off.
To sum up, as long as the amplitude of sampled signal is greater than reference signal, compare mould group and cut to the output of the control terminal of switching tube
Stop signal improves the reliability of overcurrent protection (or overvoltage protection) with direct on-off switching tube, shorten overcurrent protection (or
Overvoltage protection) response time.
In any of the above-described technical solution, optionally, further includes: one way conducting device D0, the one way conducting device D0String
It is coupled between the relatively output end of mould group and the control terminal of the switching tube, the one way conducting device D0Being configured as will
The pick-off signal is one-way transmitted to the control terminal of the switching tube.
As shown in Figure 4 and Figure 5, first switch tube Q1With third switching tube Q3When receiving the Continuity signal that driver is sent, the
Two switching tube Q2With the 4th switching tube Q4Receive the pick-off signal that driver is sent, and first switch tube Q1Turn-on time and
Second switch Q2Turn-on time between there are dead times, meanwhile, third switching tube Q3Turn-on time and the 4th switching tube
Q4Turn-on time between there are dead times.
In the technical scheme, one way conducting device is accessed by the control terminal of output end and switching tube in relatively mould group
D0, only when relatively mould group exports pick-off signal, one way conducting device D0Conducting namely direct on-off switching tube, and do not exporting
When pick-off signal, the control terminal of switching tube receives the control signal of driver, and according to control signal conduction or cut-off.
In any of the above-described technical solution, optionally, further includes: PFC mould group, the PFC
Mould group includes two half-bridge circuits 100 in parallel, is denoted as the first half-bridge circuit 100 and the second half-bridge circuit 100 respectively；It drives
Dynamic device, the driver is connected to the output end of the Hall sensor S, if the driver detects that the power supply signal is big
In busbar voltage, and the sampled signal is greater than or equal to preset voltage threshold, and the input of second half-bridge circuit 100
Electric current is greater than or equal to preset current threshold, then the driver is believed to first half-bridge circuit 100 output pulsed drive
Number, wherein the pulse drive signal is configured as controlling two switching tubes in first half-bridge circuit 100 and alternately leads
It is logical.
In the technical scheme, the size of current in power supply signal is acquired by Hall sensor S, and by comparing determining
Power supply signal is driven to be greater than busbar voltage, and when sampled signal is greater than or equal to voltage threshold and second half-bridge circuit 100
Input current is greater than or equal to preset current threshold, and the first half-bridge circuit 100 of control is started to work, namely is believed with pulsed drive
Number control the work of the first half-bridge circuit 100, usual first half-bridge circuit 100 works with high frequency mode, and switching frequency is greater than
1KHz, to reduce the impact of circuit abnormality state switch tube.
In addition, as shown in fig. 6, driver can receive three tunnel overcurrent protection signals, it is specific as follows:
(1) first comparator C1And/or the second comparator C2The comparison signal 102 of output；
(2) sampled signal 104 of the power supply signal of Hall sensor S output.
Optionally, the value range of voltage threshold is 0~200V, 0~10A of threshold value value of current threshold.
Wherein, PFC mould group includes two half-bridge circuits 100 in parallel, and is equipped with switch in four bridge arms
Pipe, that is, constitute totem pole type PFC (Power Factor Correction, PFC) mould group, optionally, half-bridge
Upper switch pipe in circuit 100 is NPN type triode, and lower switch pipe is PNP type triode, and upper switch pipe and lower switch pipe are
Common emitter connection, emitter is also an output end of above-mentioned totem pole type PFC mould group.
Alternatively it is also possible to set MOSFET (Metal-Oxide- for the switching tube in totem pole type PFC mould group
Semiconductor Field Effect Transistor, Metal Oxide Semiconductor Field Effect Transistor), switching tube
It can be SiC-type switching tube or GaN type switch tube, therefore, the switching frequency of switching tube can be promoted further, although can
Load running efficiency is further promoted, still, electromagnetic interference signal is stronger, this just needs that filter module is added to reduce electromagnetism
Interference signal.
Optionally, it is integrated between the source electrode (emitter) of the switching tube of above-mentioned totem pole type PFC and drain electrode (collector)
Reversed freewheeling diode.
In any of the above-described technical solution, optionally, first half-bridge circuit includes first switch tube Q1It is opened with second
Close pipe Q2, second half-bridge circuit includes third switching tube Q3With the 4th switching tube Q4, the first switch tube Q1With described
Two switching tube Q2Between common end access the first line of the power supply signal, the third switching tube Q3It is opened with the described 4th
Close pipe Q4Between common end access the second route and the first switch tube Q of the power supply signal1It is opened with the described 4th
Close pipe Q4Between common end access the high voltage bus in the bus circuit, the second switch Q2It is switched with the third
Pipe Q3Between common end access the low-voltage bus bar, wherein when the power supply signal is positive half-wave signal, the driver control
Make the third switching tube Q3Conducting, meanwhile, the 4th switching tube Q described in the driver control4Cut-off, the power supply signal are
When negative half-wave signa, third switching tube Q described in the driver control3Cut-off, meanwhile, the 4th opens described in the driver control
Close pipe Q4Conducting.
In any of the above-described technical solution, optionally, the switching tube is Metal Oxide Semiconductor Field Effect Transistor
Or insulated gate bipolar transistor, wherein the grid of the Metal Oxide Semiconductor Field Effect Transistor is connected to controller
Instruction output end, access reversed two pole of afterflow between the source electrode and drain electrode of the Metal Oxide Semiconductor Field Effect Transistor
Pipe, the base stage of the insulated gate bipolar transistor are connected to the instruction output end of controller, the insulated gate bipolar crystal
Reversed freewheeling diode is accessed between the emitter and collector of pipe.
Wherein, Metal Oxide Semiconductor Field Effect Transistor can imitate for depletion mode fet or enhanced field
Transistor is answered, also can choose SiC transistor or GaN transistor.
In any of the above-described technical solution, optionally, further includes: electrolytic capacitor E is set to the PFC mould group
Output end, the electrolytic capacitor E is configured as receiving the pulsating direct current signal and is converted to direct current signal；Inverter, even
It is connected to the output end of the electrolytic capacitor E, the inverter is configured as controlling the direct current signal to load supplying.
In the technical scheme, electrolytic capacitor E is arranged by the output end in half-bridge circuit 100, on the one hand, electrolytic capacitor
E is capable of providing the electricity of load running, and on the other hand, electrolytic capacitor E can also absorb the surge letter for including in drive control circuit
Number, the electromagnetic interference signal and noise for flowing to inverter can be further reduced, the reliability for promoting load running is conducive to.
Wherein, if inverter includes two half-bridge circuits 100 in parallel, single-phase load can be driven to run, if inversion
Device includes three half-bridge circuits 100 in parallel, then threephase load can be driven to run.
In any of the above-described technical solution, optionally, the capacitance value range of the electrolytic capacitor E be 10uF~
20000uF。
For the technical problems in the prior art, the invention proposes a kind of drive control circuit and household appliance,
By the way that Hall sensor is arranged in half-bridge circuit and compares mould group, overcurrent protection and overvoltage protection are carried out with switch tube, no
It only can reduce the impact caused by half-bridge circuit of parasitic capacitance and power supply signal, and can reduce the power consumption of half-bridge circuit,
In addition, also reducing the cost of drive control circuit, and then improve drive due to not needing that isolation circuit is arranged for half-bridge circuit
The reliability and stability of dynamic control circuit.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the controller of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the controller of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
It should be noted that in the claims, any reference symbol between parentheses should not be configured to power
The limitation that benefit requires.Word "comprising" does not exclude the presence of component or step not listed in the claims.Before component
Word "a" or "an" does not exclude the presence of multiple such components.The present invention can be by means of including several different components
It hardware and is realized by means of properly programmed computer.In the unit claims listing several devices, these are filled
Several in setting, which can be, to be embodied by the same item of hardware.The use of word first, second, and third is not
Indicate any sequence.These words can be construed to title.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of drive control circuit characterized by comprising
Half-bridge circuit, in bus circuit, the half-bridge circuit is configured as carrying out power supply signal for the half-bridge circuit access
Conversion process, the half-bridge circuit specifically include:
Switching tube, the switching tube are configured with control terminal；
Hall sensor, the Hall sensor are configured as sampling power supply signal, to obtain corresponding sampled signal；
Compare mould group, the first input end of the relatively mould group is configured as access reference signal, described to compare the second of mould group
Input terminal is configured as accessing the corresponding sampled signal of the electric signal,
Wherein, the output end of the relatively mould group is connected to the control terminal of the switching tube, if the absolute value of the sampled signal
Greater than the reference signal, then the relatively mould group exports pick-off signal to the switching tube.
2. drive control circuit according to claim 1, which is characterized in that the relatively mould group further include:
The positive input terminal of first comparator, the first comparator accesses the first reference signal, and bearing for the first comparator is defeated
Enter to terminate into the sampled signal, the output end of the first comparator is connected to the control terminal of the switching tube；
And/or second comparator, the negative input end of second comparator access the second reference signal, second comparator
Positive input terminal access the sampled signal, the output end of second comparator is connected to the control terminal of the switching tube,
Wherein, the reference signal is first reference signal or second reference signal.
3. drive control circuit according to claim 1, which is characterized in that further include:
One-way conduction element, the one-way conduction element are series at the control of the output end and the switching tube of the relatively mould group
Between end, the one-way conduction element is configured as the pick-off signal being one-way transmitted to the control terminal of the switching tube.
4. drive control circuit according to claim 1, which is characterized in that
PFC mould group, the PFC mould group include two half-bridge circuits in parallel, are denoted as respectively
First half-bridge circuit and the second half-bridge circuit；
Driver, the driver are connected to the output end of the Hall sensor, if the driver detects the power supply
Signal is greater than busbar voltage, and the sampled signal is greater than or equal to preset voltage threshold, and second half-bridge circuit
Input current is greater than or equal to preset current threshold, then the driver is believed to first half-bridge circuit output pulsed drive
Number,
Wherein, the pulse drive signal is configured as controlling two switching tube alternate conductions in first half-bridge circuit.
5. drive control circuit according to claim 4, which is characterized in that further include:
First half-bridge circuit includes first switch tube and second switch, and second half-bridge circuit includes third switching tube
With the 4th switching tube, the first of the power supply signal is accessed in the common end between the first switch tube and the second switch
The second route of the power supply signal is accessed in route, the common end between the third switching tube and the 4th switching tube,
And the mother of the high pressure in the bus circuit is accessed in the common end between the first switch tube and the 4th switching tube
Low-voltage bus bar is accessed in line, the common end between the second switch and the third switching tube,
Wherein, when the power supply signal is positive half-wave signal, the conducting of third switching tube described in the driver control, meanwhile, institute
State the cut-off of the 4th switching tube described in driver control, the power supply signal be negative half-wave signa when, described in the driver control
The cut-off of third switching tube, meanwhile, the conducting of the 4th switching tube described in the driver control.
6. drive control circuit according to any one of claim 1 to 5, which is characterized in that
The switching tube be Metal Oxide Semiconductor Field Effect Transistor or insulated gate bipolar transistor,
Wherein, the grid of the Metal Oxide Semiconductor Field Effect Transistor is connected to the instruction output end of controller, described
Reversed freewheeling diode, the insulated gate bipolar are accessed between the source electrode and drain electrode of Metal Oxide Semiconductor Field Effect Transistor
The base stage of transistor npn npn is connected to the instruction output end of controller, the emitter and collector of the insulated gate bipolar transistor
Between access reversed freewheeling diode.
7. drive control circuit according to any one of claim 1 to 5, which is characterized in that further include:
Electrolytic capacitor, set on the output end of the PFC mould group, the electrolytic capacitor is configured as receiving pulsation directly
Stream signal is simultaneously converted to direct current signal；
Inverter, is connected to the output end of the electrolytic capacitor, and the inverter is configured as controlling the direct current signal to negative
Carry power supply.
8. drive control circuit according to claim 7, which is characterized in that
The capacitance value range of the electrolytic capacitor is 10uF~20000uF.
9. a kind of household appliance characterized by comprising
Load；
Such as drive control circuit described in any item of the claim 1 to 8, the dynamic control circuit is configured to control power supply signal
To load supplying.
10. household appliance according to claim 9, which is characterized in that
The household appliance includes at least one of air conditioner, refrigerator, fan, smoke exhaust ventilator, dust catcher and host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606338.4A CN110299824A (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606338.4A CN110299824A (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household appliance |
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| CN110299824A true CN110299824A (en) | 2019-10-01 |
Family
ID=68030505
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910606338.4A Pending CN110299824A (en) | 2019-07-05 | 2019-07-05 | Drive control circuit and household appliance |
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