CN207098975U - A kind of counter electromotive force absorbing circuit - Google Patents
A kind of counter electromotive force absorbing circuit Download PDFInfo
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- CN207098975U CN207098975U CN201720693403.8U CN201720693403U CN207098975U CN 207098975 U CN207098975 U CN 207098975U CN 201720693403 U CN201720693403 U CN 201720693403U CN 207098975 U CN207098975 U CN 207098975U
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Abstract
A kind of counter electromotive force absorbing circuit, including controller, voltage collection circuit and voltage control circuit, wherein：The first interface of the controller is connected with one end of the voltage collection circuit, second interface for gathering controller described in busbar voltage by the voltage collection circuit is connected with one end of the voltage control circuit, the voltage control circuit includes on-off circuit and braking circuit, and the controller is by controlling the break-make of the on-off circuit to start or closing the braking circuit to be controlled to the busbar voltage；The other end of the voltage control circuit is connected with the other end of the voltage collection circuit.It is simple in construction that the utility model provides a kind of counter electromotive force absorbing circuit, can detect the change of busbar voltage in time and be responded, fast response time.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to a kind of counter electromotive force absorbing circuit.
Background technology
With the fast development of industrial automation, nowadays requirement more and more higher of the various equipment to servo-drive system, often
It is required that motor quick response, start and stop are realized, and when motor slows down suddenly from a higher speed, back-emf renewable power supply
Easily lead to voltage stabilizing power supply output overvoltage and protect shut-off or directly damage motor driver.
It is currently to add energy-dissipating brake circuit inside motor driver, the main control chip of motor driver is by detecting bus
Voltage, correspondingly handled according to the change of busbar voltage, can so take certain software resource；Add in the drive
Dynamic braking resistance increases the complexity and manufacturing cost of driver, simultaneously as the complexity of circuit, main control chip is to energy consumption
The control of braking circuit is not real-time enough, energy-dissipating brake circuit low-response, easily burns out braking resistor.
Utility model content
In order to solve the above problems, the utility model embodiment provides a kind of counter electromotive force absorbing circuit, simple in construction, can
To detect the change of busbar voltage in time and be responded, fast response time.
The utility model embodiment provides a kind of counter electromotive force absorbing circuit, including controller, voltage collection circuit and
Voltage control circuit, wherein：
The first interface of the controller is connected with one end of the voltage collection circuit, for passing through the voltage acquisition
Circuit gathers busbar voltage；
The second interface of the controller is connected with one end of the voltage control circuit, and the voltage control circuit includes
On-off circuit and braking circuit, the controller is by controlling the break-make of the on-off circuit to start or close the braking circuit
To be controlled to the busbar voltage；
The other end of the voltage control circuit is connected with the other end of the voltage collection circuit.
Alternatively, the voltage collection circuit can include first resistor, second resistance, 3rd resistor, the 4th resistance, the
One electric capacity, the second electric capacity and the first operational amplifier, wherein：
One end of the first resistor is connected with the other end of the voltage control circuit, the other end of the first resistor
One end with the second resistance, one end of the 3rd resistor are connected respectively, one end of the 3rd resistor and described first
One end connection of electric capacity and it is grounded, the other end of first electric capacity other end with the second resistance, described first respectively
The in-phase end connection of operational amplifier, one end of the first power end of first operational amplifier and second electric capacity connect
Connect, the other end of second electric capacity ground connection, the output end of first operational amplifier respectively with first operation amplifier
One end connection of the end of oppisite phase of device, the 4th resistance, the other end of the 4th resistance and the first interface of the controller
Connection.
Alternatively, the voltage control circuit can include the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the
Nine resistance, the tenth resistance, the first triode, the second triode, the 3rd triode, the first metal-oxide-semiconductor and the first diode, its
In：
One end of 5th resistance is connected with the second interface of the controller, the other end difference of the 5th resistance
The base stage of one end, first triode with the 6th resistance is connected, the other end and the control of the 6th resistance
The 3rd interface connection of device, the colelctor electrode of first triode base stage with second triode, the described 3rd 3 respectively
One end connection of the base stage of pole pipe, the 7th resistance, the other end of the 7th resistance and the current collection of the 3rd triode
Pole connects, the emitter stage of the 3rd triode one end with the 8th resistance, the emitter stage of second triode respectively
Connection, the emitter stage with first triode, one end of the 9th resistance connect the colelctor electrode of second triode respectively
Connect and be grounded, the other end with the 8th resistance, the grid of first metal-oxide-semiconductor connect the other end of the 9th resistance respectively
Connect, the source ground of first metal-oxide-semiconductor, the drain electrode of first metal-oxide-semiconductor one end with the tenth resistance, described the respectively
The positive pole connection of one diode, the other end, the voltage of the negative pole of first diode respectively with the tenth resistance are adopted
The other end connection of collector.
Alternatively, the circuit can also include power supply auxiliary circuit, wherein：
One end of the power supply auxiliary circuit other end with the voltage control circuit, the voltage collection circuit respectively
The other end connection；
The other end of the power supply auxiliary circuit is connected with the 3rd interface of the controller.
Alternatively, the power supply auxiliary circuit can include the 11st resistance, the 12nd resistance, the 13rd resistance, the tenth
Four resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 3rd electric capacity, the 4th electric capacity, the 5th electricity
Appearance, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, the second diode, the three or two
Pole pipe, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the second metal-oxide-semiconductor, the first transformer and first
Circuit, wherein:
One end of 11st resistance is connected with the 3rd interface of the controller, the other end of the 11st resistance
One end with the 12nd resistance, one end of the 13rd resistance, one end of the 3rd electric capacity, first electricity respectively
The first interface connection on road, the other end ground connection of the 12nd resistance, the second interface of first circuit respectively with it is described
The other end connection of the other end of 13rd resistance, the 3rd electric capacity, the 3rd interface of first circuit respectively with it is described
One end of 14th resistance, one end connection of the 4th electric capacity, the other end and the 5th electric capacity of the 4th electric capacity
One end connects and is grounded, the other end of the 5th electric capacity one end with the 15th resistance, first circuit respectively
4th interface connects, the 5th interfacing ground of first circuit, the 6th interface of first circuit and the described 16th electricity
One end connection of resistance, the other end of the 16th resistance are connected with the grid of second metal-oxide-semiconductor, second metal-oxide-semiconductor
The other end with the 14th resistance, one end of the 17th resistance are connected source electrode respectively, the 17th resistance it is another
One end is grounded, the drain positive pole with second diode, the primary winding of first transformer respectively of second metal-oxide-semiconductor
The first tap connection, the second tap of the primary winding of first transformer positive pole with the 3rd diode, institute respectively
One end connection of the other end of voltage control circuit, the other end of the voltage collection circuit, the 18th resistance is stated, it is described
The negative pole of 3rd diode is connected with the negative pole of second diode, and the other end of the 18th resistance is respectively with described
The negative pole connection of the 7th interface, the 4th diode of one circuit, positive pole and the 7th electric capacity of the 6th electric capacity
One end connects, and the other end of the 7th electric capacity is connected and is grounded with the negative pole of the 6th electric capacity respectively, first circuit
The 8th interface be connected with the other end of the 15th resistance, one end of the first auxiliary winding of first transformer with it is described
The positive pole connection of 5th diode, the negative pole of the 5th diode positive pole with the 8th electric capacity, the 9th electricity respectively
One end of appearance, the 3rd interface connection of the controller, the other end of the 9th electric capacity are negative with the 8th electric capacity respectively
Pole, first transformer the first auxiliary winding the other end connection and be grounded, the second auxiliary winding of first transformer
One end is connected with the positive pole of the 6th diode, the negative pole of the 6th diode respectively the positive pole with the tenth electric capacity,
One end of 11st electric capacity, the negative pole connection of the 7th diode, the positive pole of the 7th diode respectively with it is described
The other end of 11st electric capacity, the negative pole of the tenth electric capacity, first transformer the second auxiliary winding the other end connection
And it is grounded.
Alternatively, the circuit can also include rectification circuit, wherein：
The other end with the voltage control circuit, the other end of the voltage collection circuit connect the rectification circuit respectively
Connect.
The rectification circuit includes the first connector, second circuit, the 12nd electric capacity, the 13rd electric capacity and the 14th electricity
Hold, wherein:
The first interface of first connector second interface with first connector, the second circuit respectively
First interface connects, and the 3rd interface with first connector, described first connect the second interface of the second circuit respectively
Connect the 4th interface connection of device, the 3rd interfacing ground of the second circuit, the 4th interface of the second circuit respectively with institute
State the positive pole of the 12nd electric capacity, the positive pole of the 13rd electric capacity, positive pole, the voltage control circuit of the 14th electric capacity
The other end, the voltage collection circuit other end connection, the negative pole of the 12nd electric capacity respectively with the described 13rd electricity
The negative pole of appearance, the negative pole of the 14th electric capacity are connected and are grounded.
Alternatively, the circuit can also include voltage selecting circuit, wherein：
The voltage selecting circuit is connected with the 3rd interface of the controller.
Alternatively, the voltage selection can include the 19th resistance, the 20th resistance, the 21st resistance, the 20th
Two resistance and toggle switch, wherein：
One end of 19th resistance one end with the 20th resistance, the one of the 21st resistance respectively
The 3rd interface connection at end, one end of the 22nd resistance and the controller, the other end of the 19th resistance
The 4th interface with the controller, one end of first switch of the toggle switch are connected respectively, the 20th resistance
The 5th interface with the controller, one end of second switch of the toggle switch are connected the other end respectively, and the described 20th
The 6th interface with the controller, the 3rd one end switched of the toggle switch are connected the other end of one resistance respectively, institute
State the other end of the 22nd resistance respectively the 7th interface with the controller, the toggle switch the 4th switch one end
Connection, the other end of the first switch of the toggle switch other end with the second switch of the toggle switch, described respectively
The other end of 3rd switch of toggle switch, the other end of the 4th switch of the toggle switch are connected and are grounded.
Alternatively, the circuit also includes the second connector and the 3rd connector, wherein：
Second connector, the 3rd connector other end with the voltage control circuit, the voltage respectively
The other end connection of Acquisition Circuit.
In the utility model, outside counter electromotive force absorbing circuit is independently of the driver of motor, simplify the electricity of driver
Road；Voltage collection circuit and voltage control circuit are individually controlled by controller, and circuit structure is simple, can detect bus in time
Change on voltage is simultaneously timely responded to, and rectification circuit is also included in circuit, can be DC current by alternating current rectification, can be with
It is applied on the driver for supporting direct current input, now driver need not increase rectification circuit, further simplify the electricity of driver
Road.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model,
For those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 be the utility model proposes a kind of counter electromotive force absorbing circuit composition structural representation；
Fig. 2 is a kind of circuit theory diagrams for counter electromotive force absorbing circuit that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the utility model protection.
Refer to Fig. 1 and Fig. 2, Fig. 1 be the utility model proposes the composition structure of counter electromotive force absorbing circuit a kind of show
It is intended to, the circuit 10 comprises at least controller 101, voltage collection circuit 102 and voltage control circuit 103 as shown in the figure,
Wherein：
The first interface of the controller 101 is connected with one end of the voltage collection circuit 102, for passing through the electricity
Acquisition Circuit 102 is pressed to gather busbar voltage；
The second interface of the controller 102 is connected with one end of the voltage control circuit, the voltage control circuit
103 include on-off circuit 1031 and braking circuit 1032, and the controller is by controlling the break-make of the on-off circuit 1031 to open
Move or close the braking circuit 1032 to be controlled to the busbar voltage；
The other end of the voltage control circuit 103 is connected with the other end of the voltage collection circuit 102.
The operation principle of the circuit 10 is as follows：
The controller 101 obtains the voltage that the voltage collection circuit 102 collects, according to determining transformation rule
The normal voltage value of busbar voltage corresponding to voltage and the busbar voltage under motor normal work, when the controller 101
Determine that the first voltage value of busbar voltage is more than in advance not equal to normal voltage value and the difference of first voltage value and normal voltage value
If during threshold value, controller ON switch circuit 1031, braking circuit 1032 is set to start working, unnecessary power consumption is in voltage
In the braking circuit 1032 of control circuit.
Alternatively, the controller 101 can be integrated circuit, and the controller 101 includes but is not limited to central processing
Device (Center Processor Unit, CPU), embedded microcontroller (Micro Controller Unit, MCU), insertion
Microsever (Micro Processor Unit, MPU), Embedded SoC (System on Chip, SoC).
Specifically, the controller 101 can be digital signal processor (Digital Signal Processor,
DSP)。
Specifically, the controller can be model MC56F84442 processor.
Specifically, the on-off circuit can be that intelligent switch, metal-oxide-semiconductor etc. include the electricity for turning on and disconnecting two states
Road.
Alternatively, the circuit 10 can also include power supply auxiliary circuit 104, wherein：
One end of the power supply auxiliary circuit 104 other end with the voltage control circuit, the voltage acquisition respectively
The other end connection of circuit；
The other end of the power supply auxiliary circuit 104 is connected with the 3rd interface of the controller 101.
Wherein, the power supply auxiliary circuit can be used for providing stable power supply for the counter electromotive force absorbing circuit.
Alternatively, the circuit 10 can also include rectification circuit 105, wherein：
The rectification circuit 105 other end with the voltage control circuit 103, the voltage collection circuit 102 respectively
The other end connection.
Wherein, the rectification circuit 105 can be used for flowing into the alternating current rectification of AC power input for direct current
Row output.
Alternatively, the rectification circuit can be uncontrollable rectification circuit, or all controlled rectifier circuit, can also be
Half-controlled rectifier circuit.
Specifically, the rectification circuit can be bridge rectifier.
Alternatively, the circuit 10 can also include voltage selecting circuit 106, wherein：
The voltage selecting circuit 106 is connected with the 3rd interface of the controller 101.
Wherein, the voltage selecting circuit can be used for selecting the normal voltage value of the busbar voltage (to refer to motor driving
The magnitude of voltage of busbar voltage when device does not produce counter electromotive force).
Alternatively, the circuit 10 can also include the second connector 107 and the 3rd connector 108, wherein：
Second connector 107, the 3rd connector 108 respectively the other end with the voltage control circuit 103,
The other end connection of the voltage collection circuit 102.
Wherein, second connector 107 can be used for connecting power supply, and the 3rd connector 108 can be used for
Connect motor driver.
In the utility model, outside counter electromotive force absorbing circuit is independently of the driver of motor, simplify the electricity of driver
Road；Voltage collection circuit and voltage control circuit are individually controlled by controller, and circuit structure is simple, can detect bus in time
Change on voltage is simultaneously timely responded to, and rectification circuit is also included in circuit, can be DC current by alternating current rectification, can be with
It is applied on the driver for supporting direct current input, now driver need not increase rectification circuit, further simplify the electricity of driver
Road.
In one embodiment, the on-off circuit in the voltage control circuit can be metal-oxide-semiconductor, and the braking circuit can
So that comprising power resistor, structure chart corresponding to Fig. 1 to be introduced with reference to specific component.Referring to Fig. 2, Fig. 2 is this
A kind of circuit theory diagrams for counter electromotive force absorbing circuit that utility model embodiment provides, the as shown in the figure voltage collection circuit
Can include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2 and
First operational amplifier U1, wherein：
One end of the first resistor R1 is connected with the other end of the voltage control circuit 103, the first resistor R1
The other end one end with the second resistance R2, one end of the 3rd resistor R3 are connected respectively, the 3rd resistor R3's
One end is connected and is grounded with one end of the first electric capacity C1, the other end of the first electric capacity C1 respectively with the second resistance
The in-phase end connection of the R2 other end, the first operational amplifier U1, the first power end of the first operational amplifier U1
It is connected with one end of the second electric capacity C2, the other end ground connection of the second electric capacity C2, the first operational amplifier U1's
The end of oppisite phase with the first operational amplifier U1, one end of the 4th resistance R4 are connected output end respectively, and the described 4th
The resistance R4 other end is connected with the first interface VS-DSP of the controller 101.
Alternatively, the operational amplifier U1 can be a single circuit components, or one is included in
Operational amplifier in integrated circuit, such as the operational amplifier chip that integrated circuit is LMV358 series.
The voltage control circuit 102 can include the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance
R8, the 9th resistance R9, the tenth resistance R10, the first triode Q1, the second triode Q2, the 3rd triode Q3, the first metal-oxide-semiconductor M1
And the first diode D1, wherein：
One end of the 5th resistance R5 is connected with the second interface BR-DSP of the controller 101, the 5th resistance
One end with the 6th resistance R6, the base stage b of the first triode Q1 are connected the R5 other end respectively, the 6th resistance
The R6 other end is connected with the 3rd interface of the controller 101, and the colelctor electrode c of the first triode Q1 is respectively with described
Two triode Q2 base stage b, the base stage b of the 3rd triode Q3, the 7th resistance R7 one end connection, the 7th electricity
The resistance R7 other end is connected with the colelctor electrode c of the 3rd triode Q3, the emitter e of the 3rd triode Q3 respectively with institute
State the emitter e connection of the 8th resistance R8 one end, the second triode Q2, the colelctor electrode point of the second triode Q2
One end of emitter e, the 9th resistance R9 not with the first triode Q1 is connected and is grounded, the 9th resistance R9's
The other end with the 8th resistance R8, the grid g of the first metal-oxide-semiconductor M1 are connected the other end respectively, the first metal-oxide-semiconductor M1
Source electrode s ground connection, the drain electrode d of the first metal-oxide-semiconductor M1 one end with the tenth resistance R10, first diode respectively
D1 positive pole connection, the other end, the voltage of the negative pole of the first diode D1 respectively with the tenth resistance R10 are adopted
The other end connection of collector 102.
Wherein, in the utility model embodiment, the first metal-oxide-semiconductor M1 is on-off circuit, the tenth resistance R10 and
The first diode D1 forms braking circuit.
Specifically, the 3rd interface of the controller 101 can including VDD, VDDA etc. voltage interface.
Wherein, one end of the negative pole of the first diode D1 and the first resistor R1 in the voltage collection circuit 102
Connection.
Alternatively, the power supply auxiliary circuit 104 can include the 11st resistance R11, the 12nd resistance R12, the 13rd
Resistance R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance
R18, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8, the 9th electricity
Hold C9, the tenth electric capacity C10, the 11st electric capacity C11, the second diode D2, the 3rd diode D3D3, the 4th diode D4, the 5th
Diode D5, the 6th diode D 6, the 7th diode D 7, the second metal-oxide-semiconductor M2, the first transformer T 1 and the first circuit
U12, wherein:
One end of the 11st resistance R11 is connected with the 3rd interface of the controller, the 11st resistance R11's
The other end one end with the 12nd resistance R12, one end of the 13rd resistance R13, the 3rd electric capacity C3 respectively
One end, the first interface VFB connections of first circuit U 12, the other end ground connection of the 12nd resistance R12, described first
The other end with the 13rd resistance R13, the other end of the 3rd electric capacity C3 connect the second interface COMP of circuit U 12 respectively
Connect, the 3rd interface ISEN of first circuit U 12 one end with the 14th resistance R14, the 4th electric capacity C4 respectively
One end connection, the other end of the 4th electric capacity C4 is connected and is grounded with one end of the 5th electric capacity C5, and the described 5th is electric
One end with the 15th resistance R15, the 4th interface RT of first circuit U 12 are connected the appearance C5 other end respectively, institute
State the 5th interface GND ground connection of the first circuit U 12, the 6th interface OUT and the 16th resistance of first circuit U 12
R16 one end connection, the other end of the 16th resistance R16 are connected with the grid g of the second metal-oxide-semiconductor M2, and described second
The other end with the 14th resistance R14, one end of the 17th resistance R17 are connected metal-oxide-semiconductor M2 source electrode s respectively, institute
State the 17th resistance R17 other end ground connection, the drain electrode d of the second metal-oxide-semiconductor M2 respectively with the second diode D2 just
Pole, the first transformer T1 primary winding the first tap connection, the second tap of the primary winding of the first transformer T1
The other end, the voltage collection circuit 102 of positive pole with the 3rd diode D3, the voltage control circuit 103 respectively
The other end, the 18th resistance R18 one end connection, the negative pole of the 3rd diode D3 and the second diode D2
Negative pole connection, the other end of the 18th resistance R18 the 7th interface VCC with first circuit U 12, described the respectively
Four diode D4 negative pole connection, the positive pole of the 6th electric capacity C6 are connected with one end of the 7th electric capacity C7, and the described 7th
The electric capacity C7 other end is connected and is grounded with the negative pole of the 6th electric capacity C6 respectively, the 8th interface of first circuit U 12
VERF is connected with the other end of the 15th resistance R15, one end of the first auxiliary winding of the first transformer T1 with it is described
5th diode D5 positive pole connection, the negative pole of the 5th diode D5 positive pole with the 8th electric capacity C8, described respectively
9th electric capacity C9 one end, the 3rd interface connection of the controller 101, the other end of the 9th electric capacity C9 respectively with institute
State the 8th electric capacity C8 negative pole, the first transformer T1 the first auxiliary winding other end connection and be grounded, described first becomes
One end of depressor T1 the second auxiliary winding is connected with the positive pole of the 6th diode D6, the negative pole point of the 6th diode D6
One end of positive pole, the 11st electric capacity C11 not with the tenth electric capacity C10, the negative pole of the 7th diode D7 connect
Connect, the positive pole of the 7th diode D7 respectively the other end with the 11st electric capacity C11, the tenth electric capacity C10 it is negative
Pole, the first transformer T1 the second auxiliary winding the other end connection and be grounded.
Wherein, the second tap of the primary winding of the first transformer T1 respectively with the voltage control circuit 103
One end connection of first diode D1 negative pole, the first resistor R1 in the voltage collection circuit.
Alternatively, the rectification circuit 105 can include the first connector CN1, second circuit BR1, the 12nd electric capacity
C12, the 13rd electric capacity C13 and the 14th electric capacity C14, wherein:
The first interface of the first connector CN1 second interface with the first connector CN1, described second respectively
Circuit BR1 first interface AC1 connections, the second interface AC1 of the second circuit BR1 respectively with the first connector CN1
The 3rd interface, the first connector CN1 the connection of the 4th interface, the 3rd interfacing ground of the second circuit BR1 is described
Second circuit BR1 the 4th interface positive pole, the positive pole of the 13rd electric capacity C13, institute with the 12nd electric capacity C12 respectively
The 14th electric capacity C14 positive pole, the other end of the voltage control circuit 103, the other end of the voltage collection circuit is stated to connect
Connect, the negative pole of the 12nd electric capacity C12 negative pole with the 13rd electric capacity C13, the 14th electric capacity C14 respectively
Negative pole is connected and is grounded.
Wherein, the 4th interface of the second circuit BR1 respectively with the first diode in the voltage control circuit 103
One end connection of first resistor R1 in D1 negative pole, the voltage collection circuit.
Alternatively, voltage selecting circuit 106 can include the 19th resistance R19, the 20th resistance R20, the 21st electricity
R21, the 22nd resistance R 22 and toggle switch SW are hindered, wherein：
One end of the 19th resistance R19 one end with the 20th resistance R20, the 21st resistance respectively
The 3rd interface connection of R21 one end, one end of the 22nd resistance R22 and the controller 101, the described 19th
The resistance R19 other end respectively the 4th interface with the controller 101, the toggle switch SW first switch one end connect
Connect, the other end of the 20th resistance R20 the 5th interface with the controller 101, the of the toggle switch SW respectively
One end connection of two switches, the other end of the 21st resistance R21 the 6th interface with the controller 101, institute respectively
State one end connection of toggle switch SW the 3rd switch, the other end of the 22nd resistance R22 respectively with the controller
101 the 7th interface, the toggle switch SW the 4th switch one end connection, the first switch of the toggle switch SW it is another
One end respectively the other end with the second switch of the toggle switch SW, the toggle switch SW the 3rd switch the other end,
The other end of the 4th switch of the toggle switch SW is connected and is grounded.
Alternatively, the first interface of second connector 107 and the first diode in the voltage control circuit 103
D1 negative pole connection, the second interface of second connector 107 and the first diode in the voltage control circuit 103
Positive pole connection；First interface, second interface and the 3rd interface of 3rd connector 108 control with the voltage respectively
The negative pole connection of the first diode D1 in circuit 103, the 4th interface of the 3rd connector 108, the 5th interface and the
Six interfaces are grounded respectively.
It should be understood that example corresponding to Fig. 2 is only used for explaining utility model embodiment, restriction should not be formed, optional
In mode, Fig. 1 each circuit can also have other implementations, such as can be by partial ohmic (such as the first electricity in Fig. 2
Resistance) two or more equivalent resistances are split as, such as the first metal-oxide-semiconductor M1 in Fig. 2 is replaced with into other on-off circuits etc.,
This is no longer enumerated.
One is done with reference to Fig. 2 to the operation principle of the circuit to be discussed in detail.
In the case of motor normal work, controller 101 can obtain the magnitude of voltage at first interface VS-DSP, and first
Voltage at interface VS-DSP is equal to the voltage of the in-phase end of the first operational amplifier in voltage collection circuit 102, the first computing
The voltage of amplifier in-phase end is the voltage after first resistor R1 and second resistance R2 partial pressures, then can be according to the first electricity
Resistance R1 and second resistance R2 resistance value is back-calculated to obtain busbar voltage VDC magnitude of voltage, i.e. controller can be by obtaining first
The magnitude of voltage of voltage and then the determination busbar voltage in the case of motor normal work at interface VS-DSP, meanwhile, in motor
In the case of normal work, the second interface BR-DSP of controller keeps high level, the first metal-oxide-semiconductor in voltage collection circuit
M1 is off；When motor slows down suddenly from a higher speed suddenly, counter electromotive force can be produced, busbar voltage
Magnitude of voltage can increase suddenly, when controller 101 is from the first interface VS-DSP magnitude of voltage rises obtained and according to VS-DSP electricity
The corresponding relation of pressure value and bus voltage value determines the magnitude of voltage and the magnitude of voltage of busbar voltage under normal circumstances of busbar voltage
When difference is more than predetermined threshold value, second interface BR-DSP is changed into low level by controller 101, makes first in voltage collection circuit
Metal-oxide-semiconductor M1 is turned on, then because of decelerating through motor, caused unnecessary electric energy can pass through the tenth resistance in voltage collection circuit
R10 heatings consume, and busbar voltage can gradually recover normal；When controller 101 determines that the magnitude of voltage of busbar voltage recovers just
Second interface BR-DSP is changed into high level by Chang Shi, controller, and the first MOS pipes M1 in voltage collection circuit recovers to disconnect again
State.
In the utility model, outside counter electromotive force absorbing circuit is independently of the driver of motor, simplify the electricity of driver
Road；Voltage collection circuit and voltage control circuit are individually controlled by controller, and circuit structure is simple, can detect bus in time
Change on voltage is simultaneously timely responded to, and rectification circuit is also included in circuit, can be DC current by alternating current rectification, can be with
It is applied on the driver for supporting direct current input, now driver need not increase rectification circuit, further simplify the electricity of driver
Road.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Above disclosed is only the utility model preferred embodiment, can not limit the utility model with this certainly
Interest field, therefore equivalent variations made according to the utility model claims still belong to the scope that the utility model is covered.
Claims (10)
1. a kind of counter electromotive force absorbing circuit, it is characterised in that control electricity including controller, voltage collection circuit and voltage
Road, wherein：
The first interface of the controller is connected with one end of the voltage collection circuit, for passing through the voltage collection circuit
Gather busbar voltage；
The second interface of the controller is connected with one end of the voltage control circuit, and the voltage control circuit includes switch
Circuit and braking circuit, the controller is by controlling the break-make of the on-off circuit to start or closing the braking circuit with right
The busbar voltage is controlled；
The other end of the voltage control circuit is connected with the other end of the voltage collection circuit.
2. circuit as claimed in claim 1, it is characterised in that the voltage collection circuit include first resistor, second resistance,
3rd resistor, the 4th resistance, the first electric capacity, the second electric capacity and the first operational amplifier, wherein：
One end of the first resistor is connected with the other end of the voltage control circuit, the other end difference of the first resistor
One end, one end of the 3rd resistor with the second resistance are connected, one end of the 3rd resistor and first electric capacity
One end connection and be grounded, the other end other end with the second resistance, first computing respectively of first electric capacity
The in-phase end connection of amplifier, the first power end of first operational amplifier are connected with one end of second electric capacity, institute
The other end ground connection of the second electric capacity is stated, the output end of first operational amplifier is anti-with first operational amplifier respectively
Xiang Duan, the 4th resistance one end connection, the other end of the 4th resistance are connected with the first interface of the controller, institute
State the second source end ground connection of the first operational amplifier.
3. circuit as claimed in claim 1, it is characterised in that the voltage control circuit include the 5th resistance, the 6th resistance,
7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the first triode, the second triode, the 3rd triode, the first MOS
Pipe and the first diode, wherein：
One end of 5th resistance is connected with the second interface of the controller, the other end of the 5th resistance respectively with institute
State the base stage connection of one end, first triode of the 6th resistance, the other end and the controller of the 6th resistance
3rd interface connects, the colelctor electrode of first triode base stage with second triode, the 3rd triode respectively
Base stage, the 7th resistance one end connection, the colelctor electrode of the other end of the 7th resistance and the 3rd triode connects
Connecing, one end with the 8th resistance, the emitter stage of second triode are connected the emitter stage of the 3rd triode respectively,
The emitter stage with first triode, one end of the 9th resistance are connected and connect the colelctor electrode of second triode respectively
Ground, the other end with the 8th resistance, the grid of first metal-oxide-semiconductor are connected the other end of the 9th resistance respectively, institute
State the source ground of the first metal-oxide-semiconductor, drain one end with the tenth resistance, the described 1st respectively of first metal-oxide-semiconductor
The positive pole connection of pole pipe, the other end with the tenth resistance, the voltage acquisition are electric respectively for the negative pole of first diode
The other end connection on road.
4. the circuit as described in claim any one of 1-3, it is characterised in that the circuit also includes power supply auxiliary circuit, its
In：
One end of the power supply auxiliary circuit respectively the other end with the voltage control circuit, the voltage collection circuit it is another
One end connects；
The other end of the power supply auxiliary circuit is connected with the 3rd interface of the controller.
5. circuit as claimed in claim 4, it is characterised in that the power supply auxiliary circuit includes the 11st resistance, the 12nd
Resistance, the 13rd resistance, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 3rd electricity
Appearance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity,
Second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the second metal-oxide-semiconductor,
First transformer and the first circuit, wherein:
One end of 11st resistance is connected with the 3rd interface of the controller, the other end difference of the 11st resistance
One end, one end of the 13rd resistance, one end of the 3rd electric capacity, first circuit with the 12nd resistance
First interface connects, the other end of the 12nd resistance ground connection, and the second interface of first circuit is respectively with the described tenth
The other end connection of the other end of three resistance, the 3rd electric capacity, the 3rd interface of first circuit is respectively with the described tenth
One end of four resistance, one end connection of the 4th electric capacity, the other end of the 4th electric capacity and one end of the 5th electric capacity
Connect and be grounded, the other end of the 5th electric capacity one end with the 15th resistance, the 4th of first circuit the respectively
Interface connects, the 5th interfacing ground of first circuit, the 6th interface and the 16th resistance of first circuit
One end is connected, and the other end of the 16th resistance is connected with the grid of second metal-oxide-semiconductor, the source electrode of second metal-oxide-semiconductor
The other end with the 14th resistance, one end of the 17th resistance are connected respectively, the other end of the 17th resistance
Ground connection, the drain electrode of second metal-oxide-semiconductor respectively the positive pole with second diode, first transformer primary winding the
One tap connects, the second tap of the primary winding of first transformer positive pole, electricity with the 3rd diode respectively
One end of the other end of control circuit, the other end of the voltage collection circuit, the 18th resistance is pressed to connect, the described 3rd
The negative pole of diode is connected with the negative pole of second diode, and the other end of the 18th resistance is electric with described first respectively
The negative pole connection of 7th interface, the 4th diode on road, the positive pole of the 6th electric capacity and one end of the 7th electric capacity
Connection, the other end of the 7th electric capacity is connected and is grounded with the negative pole of the 6th electric capacity respectively, and the of first circuit
Eight interfaces are connected with the other end of the 15th resistance, one end of the first auxiliary winding of first transformer and the described 5th
The positive pole connection of diode, the negative pole of the 5th diode positive pole with the 8th electric capacity, the 9th electric capacity respectively
One end, the 3rd interface connection of the controller, the other end of the 9th electric capacity negative pole with the 8th electric capacity, institute respectively
State the first auxiliary winding of the first transformer the other end connection and be grounded, one end of the second auxiliary winding of first transformer with
The positive pole connection of 6th diode, the negative pole of the 6th diode positive pole with the tenth electric capacity, described the respectively
One end of 11 electric capacity, the negative pole connection of the 7th diode, the positive pole of the 7th diode is respectively with the described 11st
The other end of electric capacity, the negative pole of the tenth electric capacity, first transformer the second auxiliary winding the other end connection and be grounded.
6. the circuit as described in claim any one of 1-3, it is characterised in that the circuit also includes rectification circuit, wherein：
The other end with the voltage control circuit, the other end of the voltage collection circuit are connected the rectification circuit respectively.
7. circuit as claimed in claim 6, it is characterised in that the rectification circuit includes the first connector, second circuit, the
12 electric capacity, the 13rd electric capacity and the 14th electric capacity, wherein:
The first interface of first connector second interface with first connector, the first of the second circuit respectively
Interface connects, the second interface of the second circuit the 3rd interface with first connector, first connector respectively
The connection of the 4th interface, the 3rd interfacing ground of the second circuit, the 4th interface of the second circuit is respectively with described the
The positive pole of 12 electric capacity, the positive pole of the 13rd electric capacity, the positive pole of the 14th electric capacity, the voltage control circuit it is another
One end, the other end connection of the voltage collection circuit, the negative pole of the 12nd electric capacity respectively with the 13rd electric capacity
Negative pole, the negative pole of the 14th electric capacity are connected and are grounded.
8. the circuit as described in claim any one of 1-3, it is characterised in that the circuit also includes voltage selecting circuit, its
In：
The voltage selecting circuit is connected with the 3rd interface of the controller.
9. circuit as claimed in claim 8, it is characterised in that the voltage selecting circuit includes the 19th resistance, the 20th
Resistance, the 21st resistance, the 22nd resistance and toggle switch, wherein：
One end of 19th resistance one end, one end of the 21st resistance, institute with the 20th resistance respectively
State one end of the 22nd resistance and the 3rd interface connection of the controller, the other end of the 19th resistance respectively with
One end connection of 4th interface of the controller, the first switch of the toggle switch, the other end of the 20th resistance
The 5th interface with the controller, one end of second switch of the toggle switch are connected respectively, the 21st resistance
The other end respectively the 6th interface with the controller, the toggle switch the 3rd switch one end be connected, described second
The 7th interface with the controller, the 4th one end switched of the toggle switch are connected the other end of 12 resistance respectively,
The other end of the first switch of the toggle switch respectively open by the other end with the second switch of the toggle switch, the dial-up
The other end of the 3rd switch closed, the other end of the 4th switch of the toggle switch are connected and are grounded.
10. circuit as claimed in claim 1, it is characterised in that the circuit also includes the second connector and the 3rd connector,
Wherein：
Second connector, the 3rd connector other end with the voltage control circuit, the voltage acquisition respectively
The other end connection of circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017205836432 | 2017-05-23 | ||
| CN201720583643 | 2017-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207098975U true CN207098975U (en) | 2018-03-13 |
Family
ID=61550759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720693403.8U Expired - Fee Related CN207098975U (en) | 2017-05-23 | 2017-06-14 | A kind of counter electromotive force absorbing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207098975U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900133A (en) * | 2018-08-01 | 2018-11-27 | 浙江东方机电有限公司 | The permanent magnet synchronous motor control device and method of height driving conversion speed |
| CN109143064A (en) * | 2018-08-01 | 2019-01-04 | 浙江东方机电有限公司 | Counter electromotive force test device and method in permanent magnet synchronous motor commutation process |
-
2017
- 2017-06-14 CN CN201720693403.8U patent/CN207098975U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900133A (en) * | 2018-08-01 | 2018-11-27 | 浙江东方机电有限公司 | The permanent magnet synchronous motor control device and method of height driving conversion speed |
| CN109143064A (en) * | 2018-08-01 | 2019-01-04 | 浙江东方机电有限公司 | Counter electromotive force test device and method in permanent magnet synchronous motor commutation process |
| CN108900133B (en) * | 2018-08-01 | 2020-10-30 | 浙江东方机电有限公司 | Permanent magnet synchronous motor control device and method with high driving conversion speed |
| CN109143064B (en) * | 2018-08-01 | 2020-11-24 | 浙江东方机电有限公司 | Counter electromotive force testing device and method in reversing process of permanent magnet synchronous motor |
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Granted publication date: 20180313 Termination date: 20200614 |