CN207265918U - Speed-adjusting circuit of alternating - Google Patents
Speed-adjusting circuit of alternating Download PDFInfo
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- CN207265918U CN207265918U CN201721338395.1U CN201721338395U CN207265918U CN 207265918 U CN207265918 U CN 207265918U CN 201721338395 U CN201721338395 U CN 201721338395U CN 207265918 U CN207265918 U CN 207265918U
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Abstract
The utility model provides a kind of speed-adjusting circuit of alternating, power including forming motor feed circuit by the first afterflow module or the second afterflow module, rectification module and switch module to alternating current generator, and AC power is powered by switch module for the conducting of the first afterflow module or the second afterflow module, realize and released to the induced electromotive force produced on alternating current generator main winding by the first afterflow module or the second afterflow module, the normal operation of alternating current generator is ensure that with this.And, the composite pipe structure that first afterflow module and the second afterflow module are made of two triodes respectively, when being closed to switch module when the induced electromotive force that alternating current generator produces carries out current drain, due to its triode composite construction, therefore it is very small to maintain above-mentioned afterflow module to turn on the bias current provided by switch module, therefore it can greatly reduce and the biasing power consumption that switch module provides is provided, save the volume of this partial circuit, reduce heating loss.
Description
Technical field
It the utility model is related to AC Motor Control field, more particularly to speed-adjusting circuit of alternating.
Background technology
PWM (pulsewidth modulation) signal that a kind of current speed-adjusting circuit of alternating exports high speed by controller controls electricity
The high-speed switch switching of sub switch is when realizing the speed governing of alternating current generator, its circuit causes fever tight there are component power consumption is excessive
Weight, simultaneously because device power consumption must use bulky component to cause cost to improve greatly.
Utility model content
The main purpose of the utility model is that provide a kind of speed-adjusting circuit of alternating, it is therefore intended that solve existing friendship
The problem of stream motor speed control circuit causes related component cost to improve there are related device power consumption height.
To achieve the above object, a kind of speed-adjusting circuit of alternating provided by the utility model, the speed regualtion of AC motor
Circuit includes the first afterflow module, the second afterflow module, rectification module, switch module and MCU；
The input terminal and the second output terminal of the first afterflow module respectively with the output terminal of the second afterflow module and
The both ends of the main winding of first input end and motor are in parallel, and the second output terminal of the first afterflow module is continuous with described second
One input terminal of the first input end of flow module and the common connecting point connection AC power of motor one end, described first is continuous
Flow module and the second afterflow module include the compound transistor circuit being made of respectively two triodes；
Second input terminal of the first output terminal of the first afterflow module and the second afterflow module and described whole
The input terminal connection of flow module, another input terminal of the rectification module connect another input terminal of the AC power；
Two output terminals of the rectification module connect the switch module, provide power supply for switch module work, institute
The control terminal for stating switch module connects the MCU；
The switch module realizes that on off state switches under the control of the MCU, by the first afterflow module or
The second afterflow module, the rectification module and the switch module form the power supply circuit of the motor, and are opened described
When closing module conducting, power supply circuit of the alternating current of the AC power through the alternating current generator is with for alternating current generator confession
Electricity, when the switch module is closed, the AC power is the first afterflow module or the by the switch module
The compound transistor circuit turn-on of two afterflow modules is powered, and the induced electromotive force produced on the AC Electrical Machine Winding coil passes through
The compound transistor circuit of the first afterflow module or the second afterflow module is released.
Preferably, the first afterflow module includes the first PNP type triode, the second PNP type triode and the one or two pole
Pipe；
First PNP type triode and second PNP type triode form compound PNP type triode circuit；
The base stage of first PNP type triode be the first afterflow module the first output terminal, first positive-negative-positive
The emitter of triode connects the base stage of second PNP type triode, the collector of first PNP type triode with it is described
The anode of first diode and the collector of second PNP type triode connect altogether, and the cathode of first diode is described
Second output terminal of the first afterflow module, the input of the extremely described first afterflow module of transmitting of second PNP type triode
End.
Preferably, the first afterflow module further includes the 3rd diode；
The anode of 3rd diode connects the collector of second PNP type triode, the 3rd diode
Cathode connects the emitter of second PNP type triode.
Preferably, the first afterflow module further includes first resistor；
One end of the first resistor connects the cathode of first diode, and the other end of the first resistor is described
Second output terminal of the first afterflow module.
Preferably, the first afterflow module further includes the first RC absorptive units；
The first RC absorptive units are connected in parallel on the both ends of first diode, to absorb the first diode both ends
The disturbing pulse of generation.
Preferably, the second afterflow module includes the 3rd NPN type triode, the 4th NPN type triode and the two or two pole
Pipe；
3rd NPN type triode and the 4th NPN type triode form compound NPN type triode circuit；
The base stage of 3rd NPN type triode be the second afterflow module the second input terminal, the 3rd NPN type
The emitter of triode connects the base stage of the 4th NPN type triode, the collector of the 3rd NPN type triode with it is described
The cathode of second diode and the collector of the 4th NPN type triode connect altogether, and the anode of second diode is described
The first input end of second afterflow module, the output of the extremely described second afterflow module of transmitting of the 4th NPN type triode
End.
Preferably, the second afterflow module further includes the 4th diode；
The anode of 4th diode connects the emitter of the 4th NPN type triode, the 4th diode
Cathode connects the collector of the 4th NPN type triode.
Preferably, the second afterflow module further includes second resistance；
One end of the second resistance connects the anode of second diode, and the other end of the second resistance is described
The first input end of second afterflow module.
Preferably, the second afterflow module further includes the 2nd RC absorptive units；
The 2nd RC absorptive units are connected in parallel on the both ends of second diode, to absorb the second diode both ends
The disturbing pulse of generation.
Preferably, the switch module includes IGBT pipes and 3rd resistor；
The grid of the IGBT pipes is the control terminal of the switch module, and the emitter for stating IGBT pipes connects described whole
The cathode output end of flow module, the collector of the IGBT pipes connect the cathode output end of the rectification module, the 3rd electricity
Resistance is connected in parallel on the IGBT pipe collectors and emitter.
Preferably, the switch module further includes the 3rd RC absorptive units；
The 3rd RC absorptive units are connected in parallel on the IGBT pipe collectors and emitter, with absorb the switch module into
Disturbing pulse caused by row switching.
Preferably, the speed-adjusting circuit of alternating further includes the 4th RC absorption modules；
The 4th RC absorption modules are connected in parallel on the main winding both ends of the alternating current generator, when being run with absorbing alternating current generator
The disturbing pulse that main winding both ends produce.
The speed-adjusting circuit of alternating that the utility model embodiment provides passes through by the first afterflow module or the second afterflow mould
Block, rectification module and switch module composition motor feed circuit power alternating current generator, and are closed in MCU controlling switches module
When, AC power is powered by switch module for the conducting of the first afterflow module or the second afterflow module, is realized to exchange
The induced electromotive force produced on motor main winding is released by the first afterflow module or the second afterflow module, is ensured with this
The normal operation of alternating current generator.Moreover, the first afterflow module and the second afterflow module are answered by what two triodes were formed respectively
Pipe structure is closed, when being closed to switch module when the induced electromotive force that alternating current generator produces carries out current drain, due to thirdly pole
Pipe composite construction, therefore by switch module to maintain the bias current that above-mentioned afterflow module conducting provides very small, therefore energy
Greatly reduce and the biasing power consumption that switch module provides is provided, save the volume of this partial circuit, reduce heating loss.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the utility model speed-adjusting circuit of alternating first embodiment；
Fig. 2 is a current supply circuit schematic diagram of the utility model speed-adjusting circuit of alternating first embodiment；
Fig. 3 is another current supply circuit schematic diagram of the utility model speed-adjusting circuit of alternating first embodiment；
Fig. 4 is a continuous current circuit schematic diagram of the utility model speed-adjusting circuit of alternating first embodiment；
Fig. 5 is another continuous current circuit schematic diagram of the utility model speed-adjusting circuit of alternating first embodiment；
Fig. 6 is the circuit structure diagram of the utility model speed-adjusting circuit of alternating second embodiment；
Fig. 7 is the circuit structure diagram of the utility model speed-adjusting circuit of alternating fourth embodiment.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
With reference to Fig. 1, Fig. 1 is the speed-adjusting circuit of alternating structure chart that the utility model first embodiment provides, in order to just
In explanation, illustrate only with the relevant part of the utility model embodiment, details are as follows：
60 alignment circuit of alternating current generator that the utility model embodiment provides includes the first afterflow module 10, the second afterflow mould
Block 20, rectification module 30, switch module 40 and MCU50；
The input terminal in1 of first afterflow module 10 and the second output terminal out12 outputs with the second afterflow module 20 respectively
Hold the both ends of out2 and the main winding of first input end in21 and motor 60 in parallel, the second output terminal of the first afterflow module 10
Out12 is connected AC power with the common connecting point of 60 one end of first input end in21 and motor of the second afterflow module 20
One input terminal AC neutral line input terminal ACN-IN as shown in Figure 1；First afterflow module 10 and the second afterflow module 20 include
The compound transistor circuit being made of respectively two triodes.
Second input in22 ends of the first output terminal out11 of the first afterflow module 10 and the second afterflow module 20 and whole
The input terminal connection of flow module 30, another input terminal of rectification module 30 are connected in another input terminal such as Fig. 1 of AC power
Shown exchange firewire input terminal ACL-IN.
Two output terminal connecting valve modules 40 of rectification module 30, power supply, switch module are provided for the work of switch module 40
40 control terminal connection MCU50.Here rectification module 30 can be discrete full bridge rectifier or integrated rectifier bridge stack
Module, rectification module 30 include two ac input ends, and DC output end cathode and DC output end anode.Specifically,
As shown in Figure 1, rectification module 30 is the full bridge rectifier being made of tetra- rectifier diodes of FD1-FD4.
Switch module 40 realizes that on off state switches under the control of MCU50, is continued by the first afterflow module 10 or the second
Flow module 20, rectification module 30 and switch module 40 form the power supply circuit of motor 60, and when switch module 40 turns on, exchange
Power supply circuit of the alternating current of power supply through alternating current generator 60 for alternating current generator 60 to power, and when switch module 40 is closed, hands over
Galvanic electricity source is powered by switch module 40 for the conducting of the first afterflow module 10 or the second afterflow module 20, alternating current generator 60 around
The induced electromotive force produced on group coil is released by the conducting of the first afterflow module 10 or the second afterflow module 20.Tool
Body, as shown in Figure 1, the grid that switch module 40 includes IGBT pipes Q5 and 3rd resistor R7, IGBTQ5 pipe is switch module
Control terminal, states the complete machine output terminal of the emitter connection rectification module of IGBT pipes Q5, the collector connection rectification mould of IGBT pipes Q5
The cathode output end of block, 3rd resistor R7 are connected in parallel on IGBT pipe collectors and emitter.Here the switch of IGBT pipes Q5 is realized and opened
The switching of module 40 is closed, and when switch module 40 is closed, AC power passes through the first afterflows of 3rd resistor R7 module 10
Or second afterflow module 20 conducting power supply, to realize releasing for the induced electromotive force on 60 winding coil of alternating current generator, i.e.,
3rd resistor R7 provides bias voltage for the conducting of the first afterflow module or the 3rd afterflow module.
Specifically, the first afterflow module 10 includes the first PNP type triode Q1, the second PNP type triode Q2 and the one or two
Pole pipe D1, wherein the first PNP type triode Q1 and the second PNP type triode Q2 forms compound PNP triode circuit；
The base stage of first PNP type triode Q1 be the first afterflow module 10 the first output terminal out11, the first positive-negative-positive three
The emitter of pole pipe Q1 connects the base stage of the second PNP type triode Q2, the collector of the first PNP type triode Q1 and the one or two pole
The collector of the anode of pipe D1 and the second PNP type triode Q2 connect altogether, and the cathode of the first diode D1 is the first afterflow module 10
The second output terminal out12, the second PNP type triode Q2 transmitting extremely the first afterflow module 10 input terminal in1；
Specifically, the second afterflow module 20 includes the 3rd NPN type triode Q3, the 4th NPN type triode Q4 and the two or two
Pole pipe D2, wherein the 3rd NPN type triode Q3 and the 4th NPN type triode Q4 forms compound NPN type triode circuit；
The base stage of 3rd NPN type triode Q3 be the second afterflow module 20 the second input terminal in22, three pole of the 3rd NPN type
The emitter of pipe Q3 connects the base stage of the 4th NPN type triode Q4, the collector and the second diode of the 3rd NPN type triode Q3
The collector of the cathode of D2 and the 4th NPN type triode Q4 connect altogether, and the anode of the second diode D2 is the second afterflow module 20
The output terminal out2 of transmitting extremely the second afterflow module 20 of first input end in21, the 4th NPN type triode Q4.
The operation principle of the speed-adjusting circuit of alternating of the utility model embodiment is as follows：
When MCU50 controlling switches module 40 turns on, power supply circuit of the alternating current of AC power through alternating current generator 60
Think that alternating current generator 60 is powered, due to by alternating current generator 60 alternating current from ac input end L lines with exchange input
End N lines set out two kinds of directions, therefore its current supply circuit is different and different by the direction of alternating current, as shown in Fig. 2, working as alternating current
From the N lines of AC power when, main winding of its alternating current through motor 60, the second PNP type triode Q2 emitter and
An input terminal and cathode output end, switch module for base stage, the first PNP type triode Q1 emitters and base stage, rectification module 30
40th, the negative pole of output end of rectification module 30 and another input terminal return to the L lines of AC power；As shown in figure 3, work as alternating current from friendship
It is the input terminal and cathode output end of the rectified module 30 of its alternating current, switch module 40, whole when the L lines in galvanic electricity source set out
The negative pole of output end of flow module 30 and another input terminal, the base stage of the 3rd NPN type triode Q3 and emitter, the 4th NPN type three
The base stage and emitter of pole pipe Q3, the main winding of motor 60 return to the N lines of AC power.
When switching signal (such as frequency is in 10-30KHz) controlling switch module 40 of MCU50 output high speeds carries out on off state
During switching, being turned in switch module 40, AC power powers motor 60 through above-mentioned current supply circuit, and in MCU50 controlling switches
When module 40 is ended, do not power on motor 60, therefore the time turned on by controlling switch module 40, that is, MCU50 outputs
PWM pulsewidths length is, it can be achieved that the speed governing run to motor 60.
When MCU50 controlling switches module 40 is ended, to switch at a high speed when being powered due to motor 60, to motor 60
Its main winding of the moment of shut-off of powering produces induced electromotive force, this induced electromotive force needs 40 conducting of switch module next time again
Before release, not so so that the high voltage that induced electromotive force produces produces impact to the power device of switch module 40 and causes its damage
It is bad.When switch module 40 is closed, due to the electromagnetic induction characteristic of electrical-coil inductance, the induced electromotive force of its main winding generation
Corresponding electric current is consistent before being closed with enabling module 40, and AC power closes it preceding current supply circuit by switch module 40 at this time
In afterflow module be powered so that this afterflow module can still turn on, and the induced electromotive force of motor 60 produce correspondence
Electric current obtain afterflow through this afterflow module and release.As shown in figure 4, by the first afterflow module 10 before switch module 40 is closed
When being powered to alternating current generator 60, when switch module 40 is closed, the induced electromotive force pair of 60 main winding parameter of alternating current generator
The current drain principle answered is as follows：The transmitting of main winding of the AC power through alternating current generator 60, the second PNP type triode Q2 at this time
Pole and base stage, the first PNP type triode Q1 emitters and base stage, the diode FD4 of rectification module 30,3rd resistor R7, rectification
The diode FD2 of module 30 returns to the L lines of AC power, with to the second PNP type triode Q2's and the first PNP type triode Q1
Base stage provides bias voltage so that the two triodes can maintain conducting state, and be produced at this time on 60 main winding of alternating current generator
Raw induced electromotive force corresponding leakage current have passed through wherein several branches, such as Fig. 4 when releasing by the first afterflow module 10
Described, emitter and collector of its leakage current first through the second PNP type triode Q2 is then return to the first diode D1
The other end of 60 main winding of alternating current generator is released, and the first diode D1 is played here provides shaping operation to leakage current, and another
Some outer leakage current can reach the base stage of the second PNP type triode Q2, dashed lines portion of electrical current bleed-off circuit
P1 node locations, in this position, leakage current is divided into two branches, and due to the amplification of triode, this base current is with respect to it
Electric current between emitter and collector is small, such as during using the amplification factor of triode operation in scheming as 10 times, its base current
The 1/10 of about whole leakage current is 10%, and other parts i.e. 90% is let out by its above-mentioned emitter and collector branch
Put；This part leakage current come out from the base stage of the second PNP type triode Q2 during the first PNP type triode Q1 by being separated into
The P2 node locations of two branches, dashed lines portion of electrical current bleed-off circuit, in this position, leakage current is separated into two branch
Road, i.e. a branch are arrived by the emitter and collector of the first PNP type triode Q1 to the first diode D1, another branch
Up to the base stage of the first PNP type triode Q1, alternating current is returned to from base stage through diode F4,3rd resistor R7, diode FD2
Source input terminal, also due to the amplification of the first PNP type triode Q1, the branch current that its base stage comes out is only opposite to be entered
Part is small, such as using the amplification factor of triode operation in scheming as 10 times when, its base stage come out electric current there was only entering part
10%, remaining 90% have passed through the emitter and collector of the first PNP type triode Q1 this branch.Specifically, if exchange
The leakage current that 60 main winding of motor comes out is I1, and the emitter and collector branch current through the second PNP type triode Q2 is
I11, the electric current that the base stage through the second PNP type triode Q2 is set out are I12, this electric current enters back into the first PNP type triode Q1, into
One step is layered two branches, wherein be I121 by the branch current of its emitter and collector, the electric current come out from its base stage
For I122, if the two triode operation amplification factors are 10 times, then these branch current magnitude relationships are as follows：
I1=I11+I12, and I11=I1*9/10, I12=I1*1/10；
I12=I121+I122, and I121=I12*9/10, I122=I12*1/10；
I122=I1*1/100 can be obtained from above-mentioned formula；
It is made of 60 main winding leakage current of motor by the first PNP type triode Q1 and the second PNP type triode Q2
Meet audion after, the overwhelming majority is 99% releasing through the first diode D1 for above-mentioned electric currents, and remaining 1%
Just pass through the 3rd resistor R7 of switch module 40, therefore flow through 3rd resistor R7 electric current very littles, and if above-mentioned first afterflow mould
When block 10 only has a triode composition, it is whole leakage current to be come out from its base stage by the electric current of 3rd resistor R7
10%, still can be higher so that the relatively high fever of the power consumption of 3rd resistor R7 is also relatively high.Such as 60 main winding of motor is released
When electric current is 300mA, if the first afterflow module 10 only has a triode, it is 30mA to flow through 3rd resistor R7 electric currents, with
Voltage effective value on R7 calculates for 220V, and the power undertaken thereon is 6.6W, and relatively conventional specification is 1/8W or 1/4W
Resistance for require power very high, therefore to select the very big resistance of volume and power consumption, and send out during the work time
Hot high, this undoubtedly adds the power consumption of whole circuit, since its resistance volume is much bigger, can excessively take the space of circuit board
Its area is caused to increase, and if using the composite pipe structure being made of two triodes in the utility model embodiment, its
It is only 3mA to flow through 3rd resistor R7 electric currents, and the power undertaken thereon is only 0.66W, therefore power can be selected relatively much lower
Resistance, thus its operating power consumption is greatly reduced, and also greatly reduce with the volume of this resistance, so as to reduce whole
The area of circuit board.
Similarly, when switch module 40 is closed, the corresponding electric current that the induced electromotive force of motor 60 produces is continuous by second
When flow module 20 is released, its current drain circuit above by the first afterflow module 10 as shown in figure 5, based on being let out
The reasons why putting, very small by the relatively whole leakage current of the electric current of 3rd resistor R7, what with respect to one triode was formed releases
Electric current is much smaller.
The speed-adjusting circuit of alternating of the utility model embodiment, including by the first afterflow module 10, the second afterflow module
20th, rectification module 30, switch module 40 and MCU50 compositions, when MCU50 is turned on by controlling switch module 40, by by the
One afterflow module 10 or the second afterflow module 20, rectification module 30 and switch module 40 form the power supply circuit of motor 60 to exchanging
Motor 60 is powered, and when MCU50 controlling switches module 40 is closed, AC power is the first afterflow module by switch module 40
10 or second afterflow module 20 conducting power supply, realize and the induced electromotive force produced on 60 main winding of alternating current generator passed through
First afterflow module 10 or the second afterflow module 20 are released, and the normal operation of alternating current generator 60 is ensure that with this.Moreover,
First afterflow module 10 and the second afterflow module 20 have the composite pipe structure that two triodes are formed respectively, and switch module 20 is closed
When closing when the induced electromotive force that alternating current generator 60 produces carries out current drain, due to its triode composite construction, pass through
Switch module 20 is very small to maintain the bias current that above-mentioned afterflow module conducting provides, therefore can greatly reduce offer switch
The biasing power consumption that module provides, saves the volume of this partial circuit, reduces heating loss.
Further, based on the utility model speed-adjusting circuit of alternating first embodiment, the utility model alternating current generator
In alignment circuit second embodiment, as shown in fig. 6, the first afterflow module 10 further includes the 3rd diode D3；3rd diode D3
Anode connect the collector of the second PNP type triode Q2, the cathode of the 3rd diode D3 connects the second PNP type triode Q2's
Emitter.In switch module 40 during high speed switches to be powered to alternating current generator 60, since machine winding is perception
Load, therefore its voltage and current of loading on it is ultimately resulted in the second PNP type triode there are phase out of step conditions
There are high backward voltage between the emitter and collector of Q2, when long-term work, easily causes this triode punch through damage, because
This by one the 3rd diode D3 of parallel connection on its two poles of the earth, can by the voltage clamping between this two poles of the earth to safe voltage value it
Between, play the role of protecting the second PNP type triode Q2.
Further, the second afterflow module 20 further includes the 4th diode D4；
The anode of 4th diode D4 connects the emitter of the 4th NPN type triode Q4, and the cathode of the 4th diode D4 connects
Connect the collector of the 4th NPN type triode Q4.Here the effect of the 4th diode D4 is identical with the 3rd diode D3 effects, equally
Play the role of protecting the 4th NPN type triode Q4 to prevent backward voltage breakdown from causing damage.
Further, based on the utility model speed-adjusting circuit of alternating first embodiment, the utility model alternating current generator
In alignment circuit 3rd embodiment, as shown in fig. 6, the first afterflow module 10 further includes first resistor R1；The one of first resistor R1
The cathode of the first diode of end connection, the other end of first resistor R1 are the second output terminal out12 of the first afterflow module 10.This
In first resistor R1 be circuit that the corresponding leakage current of the induced electromotive force produced on the main winding of alternating current generator 60 passes through,
Metering function is played, prevents the component in the excessive whole circuit of damage of the electric current in bleed-off circuit.
Further, the second afterflow module 20 further includes second resistance R3；One end of second resistance R3 connects the two or two pole
The anode of pipe D2, the other end of second resistance R3 are the first input end in21 of the second afterflow module 20.Here second resistance R3
It is identical with the effect of first resistor R1, and play the metering function to leakage current.
Further, based on the utility model speed-adjusting circuit of alternating first embodiment, the utility model alternating current generator
In alignment circuit fourth embodiment, as shown in fig. 7, the first afterflow module 10 further includes the first RC absorptive units 11；First RC inhales
The both ends that unit 11 is connected in parallel on the first diode D1 are received, to absorb the disturbing pulse that the first diode both ends produce.Specific
One RC absorptive units 11 are connected in parallel on the after including the 4th resistance R2 and the first capacitance C1, the 4th resistance R2 and the first capacitance C1 series connection
The both ends of one diode D1, since switch module 40 is during high speed switching is to be powered alternating current generator 60, alternating current
The corresponding electric current of induced electromotive force produced on 60 main winding of machine is also easy to produce peak interference letter when by the first diode D1
Number, therefore the absorbing circuit by being made of the 4th resistance R2 and the first capacitance C1 absorbs its peak pulse, Neng Gougai
It is apt to EMC (electromagnetic compatibility) performance of whole circuit.
Further, the second afterflow module 20 further includes the 2nd RC absorptive units 21；2nd RC absorptive units 21 are connected in parallel on
The both ends of second diode D2, to absorb the disturbing pulse that the second diode D2 both ends produce.Specific 2nd RC absorptive units
21 include being connected in parallel on the second diode D2's after the 5th resistance R4 and the second capacitance C2, the 5th resistance R4 and the second capacitance C2 connect
Both ends, here the 2nd RC absorptive units 21 acted on the first RC absorptive units 11 identical.
Further, based on the utility model speed-adjusting circuit of alternating first embodiment, the utility model alternating current generator
In the 5th embodiment of alignment circuit, as shown in fig. 7, switch module 40 further includes the 3rd RC absorption modules 41；3rd RC absorbs single
Member 41 is connected in parallel on IGBT pipe Q5 collector and emitters, carries out disturbing arteries and veins caused by switching to absorb switch module 40
Punching.Specifically, the 3rd RC absorptive units 41 include the 6th resistance R4 and the 3rd capacitance C4, the 6th resistance R4 and the 3rd capacitance C4 string
IGBT pipe Q5 collector and emitters are connected in parallel on after connection, since switch module 40 is switching at a high speed to supply alternating current generator 60
In electric process, its collector and emitter both ends is also easy to produce peak interference signal, therefore by by the electricity of the 6th resistance R4 and the 3rd
The absorbing circuit for holding C4 compositions absorbs its peak pulse, can improve EMC (electromagnetic compatibility) performance of whole circuit.
Further, speed-adjusting circuit of alternating further includes the 4th RC absorption modules 70；4th RC absorption modules 70 are in parallel
At the main winding both ends of alternating current generator 60, to absorb the disturbing pulse that main winding both ends produce when alternating current generator 60 is run.Specifically
, the 4th RC absorption modules 70 are included after the 7th resistance R5 and the 4th capacitance C3, the 7th resistance R5 and the 4th capacitance C3 connect simultaneously
It is associated in 60 main winding both ends of alternating current generator.Since 60 current supply circuit of alternating current generator by the switching of high speed powers it, and
And there is also the continuous current circuit of high speed, therefore the main winding both ends of alternating current generator 60 are there is also peak interference pulse, by by
The absorbing circuit of seven resistance R5 and the 4th capacitance C3 compositions absorbs its peak pulse, can improve the EMC of whole circuit
(electromagnetic compatibility) performance.
In the description of this specification, the description meaning of reference term " first embodiment ", " second embodiment ", " example " etc.
Refer at least one implementation that the utility model is contained in reference to specific method, device or the feature that the embodiment or example describe
In example or example.In the present specification, schematic expression of the above terms is necessarily directed to identical embodiment or shows
Example.Moreover, specific features, method, apparatus or the feature of description can close in any one or more of the embodiments or examples
Suitable mode combines.In addition, without conflicting with each other, those skilled in the art can be by described in this specification
Different embodiments or example and different embodiments or exemplary feature are combined and combine.
It these are only the preferred embodiment of the utility model, it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas, are equally included in the patent within the scope of the utility model.
Claims (12)
1. a kind of speed-adjusting circuit of alternating, it is characterised in that the speed-adjusting circuit of alternating includes the first afterflow module, the
Two afterflow modules, rectification module, switch module and MCU；
The input terminal and the second output terminal of the first afterflow module output terminal and first with the second afterflow module respectively
The both ends of the main winding of input terminal and motor are in parallel, the second output terminal of the first afterflow module and the second afterflow mould
One input terminal of the first input end of block and the common connecting point connection AC power of motor one end, the first afterflow mould
Block and the second afterflow module include the compound transistor circuit being made of respectively two triodes；
The second input terminal and the rectification mould of first output terminal of the first afterflow module and the second afterflow module
The input terminal connection of block, another input terminal of the rectification module connect another input terminal of the AC power；
Two output terminals of the rectification module connect the switch module, and power supply is provided for switch module work, described to open
The control terminal for closing module connects the MCU；
The switch module realizes that on off state switches under the control of the MCU, by the first afterflow module or described
Second afterflow module, the rectification module and the switch module form the power supply circuit of the motor, and in the switching molding
Block turn on when, power supply circuit of the alternating current of the AC power through the alternating current generator with for the alternating current generator power,
When the switch module is closed, the AC power is continued by the switch module for the first afterflow module or second
The compound transistor circuit turn-on of flow module is powered, and the induced electromotive force produced on the AC Electrical Machine Winding coil passes through described
The compound transistor circuit of first afterflow module or the second afterflow module is released.
2. speed-adjusting circuit of alternating as claimed in claim 1, it is characterised in that the first afterflow module includes first
PNP type triode, the second PNP type triode and the first diode；
First PNP type triode and second PNP type triode form compound PNP type triode circuit；
The base stage of first PNP type triode be the first afterflow module the first output terminal, three pole of the first positive-negative-positive
The emitter of pipe connects the base stage of second PNP type triode, the collector of first PNP type triode and described first
The anode of diode and the collector of second PNP type triode connect altogether, and the cathode of first diode is described first
Second output terminal of afterflow module, the input terminal of the extremely described first afterflow module of transmitting of second PNP type triode.
3. speed-adjusting circuit of alternating as claimed in claim 2, it is characterised in that the first afterflow module further includes the 3rd
Diode；
The anode of 3rd diode connects the collector of second PNP type triode, the cathode of the 3rd diode
Connect the emitter of second PNP type triode.
4. speed-adjusting circuit of alternating as claimed in claim 2, it is characterised in that the first afterflow module further includes first
Resistance；
One end of the first resistor connects the cathode of first diode, and the other end of the first resistor is described first
Second output terminal of afterflow module.
5. speed-adjusting circuit of alternating as claimed in claim 2, it is characterised in that the first afterflow module further includes first
RC absorptive units；
The first RC absorptive units are connected in parallel on the both ends of first diode, are produced with absorbing the first diode both ends
Disturbing pulse.
6. speed-adjusting circuit of alternating as claimed in claim 1, it is characterised in that the second afterflow module includes the 3rd
NPN type triode, the 4th NPN type triode and the second diode；
3rd NPN type triode and the 4th NPN type triode form compound NPN type triode circuit；
The base stage of 3rd NPN type triode be the second afterflow module the second input terminal, three pole of the 3rd NPN type
The emitter of pipe connects the base stage of the 4th NPN type triode, the collector and described second of the 3rd NPN type triode
The cathode of diode and the collector of the 4th NPN type triode connect altogether, and the anode of second diode is described second
The first input end of afterflow module, the output terminal of the extremely described second afterflow module of transmitting of the 4th NPN type triode.
7. speed-adjusting circuit of alternating as claimed in claim 6, it is characterised in that the second afterflow module further includes the 4th
Diode；
The anode of 4th diode connects the emitter of the 4th NPN type triode, the cathode of the 4th diode
Connect the collector of the 4th NPN type triode.
8. speed-adjusting circuit of alternating as claimed in claim 6, it is characterised in that the second afterflow module further includes second
Resistance；
One end of the second resistance connects the anode of second diode, and the other end of the second resistance is described second
The first input end of afterflow module.
9. speed-adjusting circuit of alternating as claimed in claim 6, it is characterised in that the second afterflow module further includes second
RC absorptive units；
The 2nd RC absorptive units are connected in parallel on the both ends of second diode, are produced with absorbing the second diode both ends
Disturbing pulse.
10. speed-adjusting circuit of alternating as claimed in claim 1, it is characterised in that the switch module include IGBT pipe and
3rd resistor；
The grid of the IGBT pipes is the control terminal of the switch module, and the emitter of the IGBT pipes connects the rectification module
Cathode output end, the collectors of the IGBT pipes connects the cathode output end of the rectification module, and the 3rd resistor is in parallel
In the IGBT pipe collectors and emitter.
11. speed-adjusting circuit of alternating as claimed in claim 10, it is characterised in that the switch module further includes the 3rd RC
Absorptive unit；
The 3rd RC absorptive units are connected in parallel on the IGBT pipe collectors and emitter, are opened with absorbing the switch module
Concern changes caused disturbing pulse.
12. the speed-adjusting circuit of alternating as described in claim 1 to 11 is any, it is characterised in that the speed regualtion of AC motor
Circuit further includes the 4th RC absorption modules；
The 4th RC absorption modules are connected in parallel on the main winding both ends of the alternating current generator, with absorb alternating current generator operation when master around
The disturbing pulse that group both ends produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721338395.1U CN207265918U (en) | 2017-10-16 | 2017-10-16 | Speed-adjusting circuit of alternating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721338395.1U CN207265918U (en) | 2017-10-16 | 2017-10-16 | Speed-adjusting circuit of alternating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207265918U true CN207265918U (en) | 2018-04-20 |
Family
ID=61917946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721338395.1U Withdrawn - After Issue CN207265918U (en) | 2017-10-16 | 2017-10-16 | Speed-adjusting circuit of alternating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207265918U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107659239A (en) * | 2017-10-16 | 2018-02-02 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating |
-
2017
- 2017-10-16 CN CN201721338395.1U patent/CN207265918U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107659239A (en) * | 2017-10-16 | 2018-02-02 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating |
| CN107659239B (en) * | 2017-10-16 | 2023-11-28 | 广东美的制冷设备有限公司 | Speed regulating circuit of alternating current motor |
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