CN107546722A - A kind of DC motor positive and negative rotation protects control circuit - Google Patents
A kind of DC motor positive and negative rotation protects control circuit Download PDFInfo
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- CN107546722A CN107546722A CN201710788798.4A CN201710788798A CN107546722A CN 107546722 A CN107546722 A CN 107546722A CN 201710788798 A CN201710788798 A CN 201710788798A CN 107546722 A CN107546722 A CN 107546722A
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Abstract
The present invention relates to a kind of DC motor positive and negative rotation to protect control circuit, switched filter circuit, upper bridge drive circuit, lower bridge drive circuit, power main circuit, over-current detection circuit and interlock protection circuit；The present invention is without main control chip and the relay of large volume; avoid the control circuit and software control algorithm of complexity; reduce the volume and cost of circuit; drive circuit uses single supply, avoids dual power supply driving, current sampling circuit is without sensor and change-over circuit; overcurrent is protected using interlock protection circuit; cut-out main circuit in time, avoids power main circuit and motor damage, improves reliability.
Description
Technical field
The present invention relates to control circuit technical field, more particularly to a kind of DC motor positive and negative rotation protection control circuit.
Background technology
Direct current generator has the advantages that structure and control are simple, volume and weight is small, reliable, efficiency high, national defence,
The every field such as space flight, aviation, automobile, medical treatment.With the appearance of permanent-magnet material and the fast development of electronic component, permanent magnetism
Direct current generator is more widely used, and highly reliable, inexpensive DC motor control circuit turns into direct current generator development
One of key technology.
The DC motor control circuit of current main-stream mainly has two ways, and a kind of mode is built using four relays
H-bridge circuit carrys out controlled motor rotating, be the advantages of this mode it is simple in construction, it is easy to control, without main control chip, reduce
The complexity of system, shortcoming are that control circuit volume is big, and cost is high, and relay switch number is limited, reduces the reliable of system
Property, for powerful motor, relay volume is bigger, and cost is higher.The second way is to build bridge-type electricity using power tube
Road, the rotating of motor is realized using main control chip control power tube, be that control mode is flexible the advantages of this mode, it is expansible
Property it is high, shortcoming is due to that the presence of main control chip causes that control circuit is complicated, cost is high, volume is larger.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of DC motor positive and negative rotation protects control circuit, to solve
The technical problem that DC control circuit reliability is low, volume is big, cost is high.
The purpose of the present invention is mainly achieved through the following technical solutions：
As shown in figure 1, in based on one embodiment of the present of invention, there is provided a kind of DC motor positive and negative rotation protection control
Circuit, including：Upper bridge drive circuit, lower bridge drive circuit, power main circuit, over-current detection circuit and interlock protection circuit；Its
The middle positive rotaring signal SZ and reverse signal SF of motor is connected to the input of bridge drive circuit, and upper bridge drive circuit output motor drives
Dynamic signal SZ2, SF2 and lower bridge drive signal SZ3, SF3, lower bridge drive signal SZ3, SF3 are connected to lower bridge drive circuit input
End, the motor drive signal SZ2 of lower bridge drive circuit output motor drive signal SZ4, SF4 and upper bridge drive circuit output and
SF2 is connected to power main circuit and carrys out controlled motor rotating, and power main circuit output protection voltage signal CU1 connected with CU2
The input of current detection circuit, over-current detection circuit cut off circuit, over-current detection circuit output voltage signal when electric current transfinites
OV1 and OV2 is connected to the input of interlock protection circuit；Interlock protection circuit exports according to the voltage signal OV1 and OV2 of input
Voltage control signal OV3 and OV4 to upper bridge drive circuit control terminal, when input positive rotaring signal and reverse signal simultaneously for height
Level or when there is over current of motor, the upper bridge drive circuit of control signal block.
In another embodiment based on circuit of the present invention, in addition to switched filter circuit, the positive rotaring signal SZ of motor and
Reverse signal SF is connected to the input of switched filter circuit, and after switched filter circuit filters, output rotates forward filtering signal SZ1
The input of upper bridge drive circuit is connected to reversion filtering signal SF1；Switched filter circuit includes：Resistance R16, resistance R17,
Resistance R21, resistance R22, electric capacity C1, electric capacity C2, NPN triode K12, NPN triode K7；Resistance R16 one end be motor just
Rotaring signal SZ input, the resistance R16 other end one end with electric capacity C1, resistance R17 one end, NPN triode K12 respectively
Base stage connection, the electric capacity C1 other end, the resistance R17 other end and NPN triode K12 emitter stage with being all connected with power supply
GND, NPN triode K12 colelctor electrode export SZ1 signals as output end；Resistance R21 one end is as motor reversal signal SF
Input, one end with electric capacity C2, resistance R22 one end, NPN triode K7 base stage are connected the resistance R21 other end respectively,
The electric capacity C2 other end and resistance the R22 other end, GND is connected NPN triode K7 emitter stage with power supply, the poles of NPN tri-
Pipe K7 colelctor electrode exports SF1 signals as output end.
In another embodiment based on circuit of the present invention, upper bridge drive circuit includes：Resistance R2, resistance R15, resistance
R8, resistance R26, resistance R27, resistance R28, resistance R18, resistance R23, PNP triode K2, PNP triode K4；Resistance R2 one end
Accessed as input and rotate forward filtering signal SZ1, the other end is connected with PNP triode K2 base stage, and tie point drives for upper bridge
First control terminal of circuit, PNP triode K2 emitter stage are connected with power supply VCC, PNP triode K2 colelctor electrode and resistance R8
One end connection, one end with resistance R23, R27 one end be connecteds the resistance R8 other end respectively, tie point output motor drive
Signal SZ2, the R23 lower bridge drive signal SZ3 of other end output；Reversion filtering letter is accessed in resistance R15 one end as input
Number SF1, the resistance R15 other end are connected with PNP triode K4 base stage, tie point for upper bridge drive circuit the second control
End, PNP triode K4 emitter stage are connected with power supply VCC, and PNP triode K4 colelctor electrode is connected with resistance R26 one end, electricity
One end with resistance R28, R18 one end are connected the resistance R26 other end respectively, tie point output motor drive signal SF2, R18
The lower bridge drive signal SF3 of other end output.
In another embodiment based on circuit of the present invention, lower bridge drive circuit includes：Resistance R19, resistance R20, electricity
Hinder R24, resistance R25, NPN triode K8, NPN triode K10；NPN triode K8 base stage is connected with resistance R19 one end,
The lower bridge drive signal SF3, NPN triode K8 of tie point input colelctor electrode and the R27 other end connect, and resistance R19's is another
End is connected with resistance R20 one end, NPN triode K8 emitter stage, tie point output motor drive signal SF4, resistance R20's
GND is connected the other end with power supply；NPN triode K10 base stage is connected with resistance R24 one end, and the lower bridge of tie point input drives
Dynamic signal SZ3, NPN triode K10 colelctor electrode and the R28 other end connect, the resistance R24 other end and the one of resistance R25
End, NPN triode K10 emitter stage connection, tie point output motor drive signal SZ4, resistance the R25 other end are with power supply
GND connections.
In another embodiment based on circuit of the present invention, power main circuit includes：NPN triode K3, NPN triode
K5, NPN triode K9, NPN triode K11, diode D1, diode D2, diode D3, diode D4；Wherein, the poles of NPN tri-
Pipe K3 base stage input motor drive signal SZ2, NPN triode K9 base stage input motor drive signal SF4, NPN triode
K3 emitter stage and the resistance R27 other end, NPN triode K8 colelctor electrode, NPN triode K9 colelctor electrode, diode D1
Anode, diode D3 negative electrode, direct current generator positive pole connection, NPN triode K9 emitter stage, diode D3 anode with
Power supply GND connections, diode D1 negative electrode be connected with power supply VCC, the of NPN triode K3 current collection extremely power main circuit
One output end；NPN triode K5 base stage input motor drive signal SF2, NPN triode K11 base stage input motor driving
Signal SZ4, NPN triode K5 emitter stage and the resistance R28 other end, NPN triode K10 colelctor electrode, NPN triode
The negative pole connection of K11 colelctor electrode, diode D2 anode, diode D4 negative electrode, direct current generator, NPN triode K11 hair
Emitter-base bandgap grading, GND is connected diode D4 anode with power supply, and diode D2 negative electrode is connected with power supply VCC, NPN triode K5's
Second output end of current collection extremely power main circuit；First output end output protection voltage signal CU1 of power main circuit, power
Second output end output protection voltage signal CU2 of main circuit.
In another embodiment based on circuit of the present invention, over-current detection circuit includes：Resistance R4, resistance R5, resistance
R6, resistance R7, resistance R9, resistance R10, resistance R11, resistance R12；Wherein, resistance R6 one end is connected with resistance R7 one end,
Tie point is connected for the first input end of over-current detection circuit with the first output end of power main circuit, the resistance R6 other end and
The R7 other end, R4 one end, R5 one end connection, tie point be over-current detection circuit the first output end, the R4 other end
It is connected with the R5 other end with power supply VCC；Resistance R11 one end is connected with resistance R12 one end, and tie point is over-current detection electricity
Second input on road is connected with the second output end of power main circuit, the resistance R11 other end and the R12 other end, R9
One end, R10 one end connection, tie point are the second output end of over-current detection circuit, the R9 other end and the R10 other end with
Power supply VCC connections；The first input end of over-current detection circuit is connected with protection voltage signal CU1, and the second of over-current detection circuit
Input is connected with protection voltage signal CU2, the first output end output voltage signal OV1, the second output end output voltage signal
OV2。
In another embodiment based on circuit of the present invention, interlock protection circuit includes：Resistance R1, resistance R3, resistance
R13, resistance R14, PNP triode K1, PNP triode K6；Wherein, R3 one end for interlock protection circuit first input end with
The first output end connection of over-current detection circuit, the R3 other end and K1 base stage connect, PNP triode K1 emitter stage, electricity
Resistance R1 one end is connected with power supply VCC, and PNP triode K1 colelctor electrode is connected with the resistance R1 other end, and tie point is interlocking
First output end of protection circuit is connected with the first control terminal of upper bridge protection circuit；R13 one end is interlock protection circuit
Second output end of the second input and over-current detection circuit connects, and the R13 other end and K6 base stage connect, PNP triode
K6 emitter stage, resistance R14 one end are connected with power supply VCC, and PNP triode K6 colelctor electrode connects with the resistance R14 other end
Connect, tie point is connected for the second output end of interlock protection circuit with the second control terminal of upper bridge protection circuit；Interlock protection electricity
The first input end input voltage signal OV1 on road, the second input input voltage signal OV2 of interlock protection circuit, interlocking are protected
First output end output voltage control signal OV3 of protection circuit, the second output end output voltage control letter of interlock protection circuit
Number OV4, voltage control signal OV3 and OV4 connect the first control terminal and the second control terminal of bridge drive circuit respectively.
In another embodiment based on circuit of the present invention, during motor normal operation, if positive rotaring signal SZ is high electricity
Flat, reverse signal SF is low level, and NPN triode K12 conductings, NPN triode K7 shut-offs, it is low electricity to rotate forward filtering signal SZ1
Flat, reversion filtering signal SF1 is high level, and PNP triode K2 conductings, PNP triode K4 shut-offs, SZ2 is high level, and SF2 is
Low level, SZ3 are high level, and SF3 is low level, and NPN triode K3 is turned on, and NPN triode K5 shut-offs, NPN triode K8 is closed
Disconnected, NPN triode K10 conductings, SZ4 is high level, and SF4 is low level, and NPN triode K11 is turned on, NPN triode K9 shut-offs,
Electric current flows through resistance R4, resistance R5, resistance R6, resistance R7, NPN triode K3, direct current generator, the poles of NPN tri- by power supply VCC
GND, formation closed-loop path, motor rotate forward pipe K11 with flowing into power supply；If positive rotaring signal SZ is low level, reverse signal SF is
High level, NPN triode K7 conductings, NPN triode K12 shut-offs, it is high level to rotate forward filtering signal SZ1, inverts filtering signal
SF1 is low level, and PNP triode K2 shut-offs, PNP triode K4 conductings, SZ2 is low level, and SF2 is high level, and SZ3 is low electricity
Flat, SF3 is high level, and NPN triode K3 is turned off, NPN triode K5 conductings, NPN triode K8 conductings, and NPN triode K10 is closed
Disconnected, SZ4 is low level, and SF4 is high level, NPN triode K11 shut-offs, NPN triode K9 conductings, electric current by power supply VCC,
Resistance R9, resistance R10, resistance R11, resistance R12, NPN triode K5, direct current generator, NPN triode K9 flow into power supply ground GND,
Form closed-loop path, motor reversal.
In another embodiment based on circuit of the present invention, during normal work, PNP triode K1 and PNP triode K6
Holding complete switches off state, when there is excessively stream in motor, if motor rotates forward, and resistance R9 and resistance in over-current detection circuit
The voltage at R10 both ends is zero, and the voltage rise at resistance R4 and resistance R5 both ends, protection voltage signal CU1 is reduced, protection voltage letter
Number CU2 is constant, and the voltage difference between power supply VCC and voltage signal OV2 is zero, PNP triode K6 shut-offs, power supply VCC and voltage
Voltage difference increase between signal OV1, turns on the PNP triode K1 in interlock protection circuit by resistance R3, PNP triode
Low-voltage is presented between K1 collector and emitters, interlock protection circuit the first output end output voltage OV3 is high level, will
PNP triode K2 is turned off, and low level is presented in motor drive signal SZ2, realizes the block to upper bridge drive signal, NPN triode
K3 is turned off, and the electric current for flowing through motor is cut off；If motor reversal, resistance R4's and resistance R5 both ends in over-current detection circuit
Voltage is zero, and the voltage rise at resistance R9 and resistance R10 both ends, protection voltage signal CU2 is reduced, and protects voltage signal CU1 not
Become, the voltage difference between power supply VCC and voltage signal OV1 is zero, PNP triode K1 shut-offs, power supply VCC and voltage signal OV2
Between voltage difference increase, turn on the PNP triode K6 in interlock protection circuit by resistance R13, PNP triode K6 current collections
Low-voltage is presented between pole and emitter stage, interlock protection circuit the second output end output voltage OV4 is high level, by the poles of PNP tri-
Pipe K4 is turned off, and low level is presented in motor drive signal SF2, realizes the block to upper bridge drive signal, and NPN triode K5 is turned off,
The electric current for flowing through motor is cut off.
In another embodiment based on circuit of the present invention, when simultaneously high electricity occurs in positive rotaring signal SZ and reverse signal SF
Usually, due to over-current detection circuit, resistance R4, the voltage at resistance R5 both ends and resistance R9, the voltage liter at resistance R10 both ends be present
Height, protection voltage signal CU1 and CU2 will be reduced, and the voltage difference increase between power supply VCC and voltage signal OV1, pass through resistance
R3 turns on the PNP triode K1 in interlock protection circuit, and low-voltage is presented between PNP triode K1 collector and emitters,
Interlock protection circuit the first output end output voltage OV3 is high level, and PNP triode K2 is turned off, and motor drive signal SZ2 is in
Existing low level, the upper bridge drive signal of block, NPN triode K3 are turned off, and motor rotating forward passage is cut off；Power supply VCC and voltage letter
Voltage difference increase between number OV2, turns on the PNP triode K6 in interlock protection circuit by resistance R13, PNP tri-
Low-voltage is presented between pole pipe K6 collector and emitters, interlock protection circuit the second output end output voltage OV4 is high level,
PNP triode K4 is turned off, motor drive signal SF2 presentation low levels, bridge drive signal in block, NPN triode K5 shut-offs,
Motor reversal passage is cut off.
The present invention has the beneficial effect that：
The present invention without main control chip and the relay of large volume, calculate by the control circuit and software control for avoiding complexity
Method, reduce the volume and cost of circuit, drive circuit uses single supply, avoid dual power supply driving, current sampling circuit without
Sensor and change-over circuit are needed, overcurrent is protected using interlock protection circuit, main circuit is cut off in time, avoids power
Main circuit and motor damage, improve reliability.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing
In, identical reference symbol represents identical part.
Fig. 1 is the circuit diagram of one embodiment of the invention；
Fig. 2 is the circuit diagram of another embodiment of the present invention；
Fig. 3 is the circuit diagram of another embodiment of the present invention；
Fig. 4 is switched filter circuit circuit diagram；
Fig. 5 is upper bridge drive circuit circuit diagram；
Fig. 6 is lower bridge drive circuit circuit diagram；
Fig. 7 is over-current detection circuit circuit diagram；
Fig. 8 is over-current detection circuit circuit diagram；
Fig. 9 is interlock protection circuit circuit diagram.
Embodiment
The preferred embodiments of the present invention are specifically described below in conjunction with the accompanying drawings, wherein, accompanying drawing forms the application part, and
It is used for the principle for explaining the present invention together with embodiments of the present invention.
The embodiment of the present application provides a kind of DC motor positive and negative rotation protection control circuit,
Two embodiments of the present invention are respectively illustrated as shown in Figure 1, Figure 2, and embodiment illustrated in fig. 1 signal directly inputs bridge drive
Dynamic circuit；Embodiment illustrated in fig. 2, to cause control more accurate, signal inputs upper bridge drive circuit after filtering first.Such as Fig. 2 institutes
Show in a specific embodiment of the invention, DC motor positive and negative rotation control circuit specifically includes：Switched filter circuit, upper bridge drive
Dynamic circuit, lower bridge drive circuit, power main circuit, over-current detection circuit and interlock protection circuit；The wherein positive rotaring signal SZ of motor
The input of switched filter circuit is connected to reverse signal SF, after switched filter circuit filters, output rotates forward filtering signal
SZ1 and reversion filtering signal SF1 is connected to the input of bridge drive circuit, upper bridge drive circuit output motor drive signal
SZ2, SF2 and lower bridge drive signal SZ3, SF3, lower bridge drive signal SZ3, SF3 are connected to lower bridge drive circuit input, lower bridge
The motor drive signal SZ2 and SF2 that drive circuit output motor drive signal SZ4, SF4 exports with upper bridge drive circuit are connected to
Power main circuit carrys out controlled motor rotating, and power main circuit output protection voltage signal CU1 connects over-current detection circuit with CU2
Input, over-current detection circuit cuts off circuit when electric current transfinites, and over-current detection circuit output voltage signal OV1 and OV2 connect
It is connected to the input of interlock protection circuit；Interlock protection circuit is believed according to voltage signal OV1 and the OV2 output voltage control of input
The control terminal of number OV3 and OV4 to upper bridge drive circuit.
In another embodiment of the present invention, physical circuit figure is as shown in Figure 3.
Wherein, as shown in figure 4, switch filter includes：Resistance R16, resistance R17, resistance R21, resistance R22, electric capacity C1,
Electric capacity C2, NPN triode K12, NPN triode K7；Resistance R16 one end be the positive rotaring signal SZ of motor input, resistance R16
The other end one end with electric capacity C1, resistance R17 one end, NPN triode K12 base stage are connected respectively, electric capacity C1's is another
End, resistance R17 the other end and NPN triode K12 emitter stage with being all connected with power supply GND, NPN triode K12 colelctor electrode
SZ1 signals are exported as output end；Resistance R21 one end is as motor reversal signal SF inputs, the resistance R21 other end point
One end of one end, resistance R22 not with electric capacity C2, NPN triode K7 base stage are connected, electric capacity the C2 other end and resistance R22
The other end, GND is connected NPN triode K7 emitter stage with power supply, NPN triode K7 colelctor electrode is defeated as output end
Go out SF1 signals.
As shown in figure 5, upper bridge drive circuit includes：Resistance R2, resistance R15, resistance R8, resistance R26, resistance R27, resistance
R28, resistance R18, resistance R23, PNP triode K2, PNP triode K4；Resistance R2 one end is accessed as input and rotates forward filtering
Signal SZ1, the other end are connected with PNP triode K2 base stage, tie point be upper bridge drive circuit the first control terminal, PNP tri-
Pole pipe K2 emitter stage is connected with power supply VCC, and PNP triode K2 colelctor electrode is connected with resistance R8 one end, and resistance R8's is another
One end with resistance R23, R27 one end are connected respectively for one end, and tie point output motor drive signal SZ2, the R23 other end are defeated
Go out lower bridge drive signal SZ3；Reversion filtering signal SF1, the resistance R15 other end are accessed in resistance R15 one end as input
Be connected with PNP triode K4 base stage, tie point be upper bridge drive circuit the second control terminal, PNP triode K4 emitter stage
Be connected with power supply VCC, PNP triode K4 colelctor electrode is connected with resistance R26 one end, the resistance R26 other end respectively with electricity
Hinder one end connection of R28 one end, R18, tie point output motor drive signal SF2, the R18 lower bridge driving letter of other end output
Number SF3.
As shown in fig. 6, lower bridge drive circuit includes：Resistance R19, resistance R20, resistance R24, resistance R25, NPN triode
K8, NPN triode K10；NPN triode K8 base stage is connected with resistance R19 one end, the lower bridge drive signal of tie point input
SF3, NPN triode K8 colelctor electrode and the R27 other end connect, the resistance R19 other end and resistance R20 one end, NPN tri-
Pole pipe K8 emitter stage connection, GND is connected tie point output motor drive signal SF4, resistance the R20 other end with power supply；
NPN triode K10 base stage is connected with resistance R24 one end, the lower bridge drive signal SZ3, NPN triode K10 of tie point input
Colelctor electrode and the R28 other end connect, the resistance R24 other end and resistance R25 one end, NPN triode K10 emitter stage
Connection, GND is connected tie point output motor drive signal SZ4, resistance the R25 other end with power supply.
As shown in fig. 7, power main circuit includes：NPN triode K3, NPN triode K5, the pole of NPN triode K9, NPN tri-
Pipe K11, diode D1, diode D2, diode D3, diode D4；Wherein, NPN triode K3 base stage input motor driving
Signal SZ2, NPN triode K9 base stage input motor drive signal SF4, NPN triode K3 emitter stage are another with resistance R27's
One end, NPN triode K8 colelctor electrode, NPN triode K9 colelctor electrode, diode D1 anode, diode D3 negative electrode, straight
The positive pole connection of motor is flowed, GND is connected with power supply for NPN triode K9 emitter stage, diode D3 anode, diode D1's
Negative electrode is connected with power supply VCC, the first output end of NPN triode K3 current collection extremely power main circuit；NPN triode K5 base
Pole inputs motor drive signal SF2, NPN triode K11 base stage input motor drive signal SZ4, NPN triode K5 transmitting
Pole and the resistance R28 other end, NPN triode K10 colelctor electrode, NPN triode K11 colelctor electrode, diode D2 anode,
The negative pole connection of diode D4 negative electrode, direct current generator, NPN triode K11 emitter stage, diode D4 anode and power supply
GND connections, diode D2 negative electrode are connected with power supply VCC, the second output of NPN triode K5 current collection extremely power main circuit
End；First output end output protection voltage signal CU1 of power main circuit, the second output end output protection electricity of power main circuit
Press signal CU2.
As shown in figure 8, over-current detection circuit includes：Resistance R4, resistance R5, resistance R6, resistance R7, resistance R9, resistance
R10, resistance R11, resistance R12；Wherein, resistance R6 one end is connected with resistance R7 one end, and tie point is over-current detection circuit
First input end be connected with the first output end of power main circuit, the resistance R6 other end and the R7 other end, R4 one end,
R5 one end connection, tie point are the first output end of over-current detection circuit, the R4 other end and the R5 other end and power supply VCC
Connection；Resistance R11 one end is connected with resistance R12 one end, and tie point is the second input and power of over-current detection circuit
The second output end connection of main circuit, the resistance R11 other end and the R12 other end, R9 one end, R10 one end connect, even
Contact is the second output end of over-current detection circuit, and the R9 other end and the R10 other end are connected with power supply VCC；Over-current detection
The first input end of circuit is connected with protection voltage signal CU1, the second input and the protection voltage signal of over-current detection circuit
CU2 connections, the first output end output voltage signal OV1, the second output end output voltage signal OV2.
As shown in figure 9, interlock protection circuit includes：Resistance R1, resistance R3, resistance R13, resistance R14, PNP triode K1,
PNP triode K6；Wherein, R3 one end is the first input end of interlock protection circuit and the first output end of over-current detection circuit
Connection, the R3 other end and K1 base stage are connected, and PNP triode K1 emitter stage, resistance R1 one end are connected with power supply VCC,
PNP triode K1 colelctor electrode is connected with the resistance R1 other end, tie point for interlock protection circuit the first output end with it is upper
The first control terminal connection of bridge protection circuit；R13 one end is the second input and over-current detection circuit of interlock protection circuit
The connection of the second output end, the R13 other end and K6 base stage connects, PNP triode K6 emitter stage, resistance R14 one end
It is connected with power supply VCC, PNP triode K6 colelctor electrode is connected with the resistance R14 other end, and tie point is interlock protection circuit
Second output end is connected with the second control terminal of upper bridge protection circuit；The first input end input voltage signal of interlock protection circuit
OV1, the second input input voltage signal OV2 of interlock protection circuit, the first output end output voltage of interlock protection circuit
Control signal OV3, the second output end output voltage control signal OV4 of interlock protection circuit, voltage control signal OV3 and OV4
The first control terminal and the second control terminal of upper bridge drive circuit are connected respectively.
During motor normal operation, if motor rotates forward, positive rotaring signal SZ is high level, and reverse signal SF is low level, warp
Cross after switched filter circuit, NPN triode K12 conductings, NPN triode K7 shut-offs, produce and rotate forward filtering signal SZ1 and reversion
Filtering signal SF1 is input to bridge drive circuit, and SZ1 is low level, and SF1 is high level, by upper bridge drive circuit, PNP tri-
Pole pipe K2 is turned on, and PNP triode K4 shut-offs, generating motor drive signal SZ2, SF2 and lower bridge drive signal SZ3, SF3, SZ2 is
High level, SF2 are low levels, and SZ3 is high level, and SF3 is low level, NPN triode K3 conductings, NPN triode K5 shut-offs, is believed
The lower bridge drive circuit of number SZ3 and signal SF3 inputs, NPN triode K8 shut-offs, NPN triode K10 conductings, lower bridge drive circuit
Generation motor drive signal SZ4 and SF4, SZ4 are high level, and SF4 is low level, and NPN triode K11 is turned on, NPN triode K9
Shut-off, so far, electric current flow through resistance R4, resistance R5, resistance R6, resistance R7, NPN triode K3, straight by positive source VCC
Flow motor, GND, formation closed-loop path, motor rotate forward NPN triode K11 with flowing into power supply.If motor reversal, positive rotaring signal
SZ is low level, and reverse signal SF is high level, after switched filter circuit, NPN triode K12 shut-offs, and NPN triode
K7 is turned on, and is produced and is rotated forward filtering signal SZ1 and reversion filtering signal SF1 is input to bridge drive circuit, and SZ1 is high level, SF1
It is low level, by upper bridge drive circuit, PNP triode K2 shut-offs, PNP triode K4 conductings, generation signal SZ2, signal
SF2, signal SZ3, signal SF3, SZ2 are low levels, and SF2 is high level, and SZ3 is low level, and SF3 is high level, NPN triode
K3 is turned off, NPN triode K5 conductings, signal SZ3 and the lower bridge drive circuit of signal SF3 inputs, NPN triode K8 conductings, NPN tri-
Pole pipe K10 is turned off, and lower bridge drive circuit generation signal SZ4 and signal SF4, SZ4 are low level, and SF4 is to level, the poles of NPN tri-
Pipe K11 is turned off, and NPN triode K9 conductings, so far, electric current flows through resistance R9, resistance R10, resistance by positive source VCC
GND, formation closed-loop path, motor are anti-with flowing into power supply by R11, resistance R12, NPN triode K5, direct current generator, NPN triode K9
Turn.
Under normal circumstances, no matter motor is rotated forward or inverted, resistance R4 and resistance R5 both ends in over-current detection circuit
Voltage all deficiencies turn on PNP triode K1 by resistance R3, voltage all deficiencies at resistance R9 and resistance R10 both ends pass through electricity
Resistance R13 turns on PNP triode K6, and PNP triode K1 and PNP triode K6 keep complete switching off state, when motor occurred
During stream, if now motor rotates forward, the voltage of resistance R9 and resistance R10 both ends in over-current detection circuit are zero, resistance R4 and
The voltage at resistance R5 both ends can be raised, and protection voltage signal CU1 will be reduced, and protection voltage signal CU2 is constant, power supply VCC and
Voltage difference between voltage signal OV2 is zero, PNP triode K6 shut-offs, the voltage difference between power supply VCC and voltage signal OV1
It will increase, turn on the PNP triode K1 in interlock protection circuit by resistance R3, PNP triode K1 colelctor electrodes and transmitting
Low-voltage is presented between pole, interlock protection circuit the first output end output voltage OV3 is high level, and PNP triode K2 is turned off,
Low level is presented in motor drive signal SZ2, realizes the block to upper bridge drive signal, NPN triode K3 shut-offs, flows through motor
Electric current is cut off, and current of electric reduces, and reaches the purpose of protection motor, when current of electric returns to running current, PNP
Triode K1 is turned off again, and motor continues normal rotate forward.If motor reversal, resistance R4 and resistance R5 two in over-current detection circuit
The voltage at end is zero, and the voltage at resistance R9 and resistance R10 both ends can raise, and protection voltage signal CU2 will be reduced, and protect voltage
Signal CU1 is constant, and the voltage difference between power supply VCC and voltage signal OV1 is zero, PNP triode K1 shut-offs, power supply VCC and electricity
Voltage difference between pressure signal OV2 will increase, and turn on the PNP triode K6 in interlock protection circuit by resistance R13,
Low-voltage is presented between PNP triode K6 collector and emitters, interlock protection circuit the second output end output voltage OV4 is height
Level, PNP triode K4 is turned off, low level is presented in motor drive signal SF2, realizes the block to upper bridge drive signal, NPN
Triode K5 is turned off, and the electric current for flowing through motor is cut off, and current of electric reduces, and is reached the purpose of protection motor, is worked as current of electric
When returning to running current, PNP triode K6 is turned off again, and motor continues normal reversion.
Under normal circumstances, positive the rotaring signal SZ and reverse signal SF of motor are not allow to be high level simultaneously, if behaviour
Occur maloperation or other operating modes in work, when causing positive rotaring signal SZ and reverse signal SF while high level occur, signal
SZ2, signal SF2, signal SZ4, signal SF4 will occur high level, NPN triode K3, the pole of PNP triode K4, NPN tri- simultaneously
Pipe K9, NPN triode K11 will be turned on by driving simultaneously, so far, it will have two current paths to produce, current loop one is
Electric current flows through resistance R4, resistance R5, resistance R6, resistance R7, NPN triode K3, NPN triode K9 streams by positive source VCC
GND with entering power supply, forms closed-loop path, and current loop two is electric current by positive source VCC, flow through resistance R9, resistance R10,
Resistance R11, resistance R12, NPN triode K5, NPN triode K11 flow into power supply ground GND, closed-loop path are formed, due to resistance
R4, resistance R5, resistance R6, resistance R7, resistance R9, resistance R10, resistance R11, resistance R12 are sampling resistors, and numerical value is all very
It is small, flow through NPN triode K3, NPN triode K9, NPN triode K5, NPN triode K11 electric current can be very big, if be not added with
The danger being burned out be present, reduce electricity in protection, NPN triode K3, NPN triode K9, NPN triode K5, NPN triode K11
Road reliability, due to over-current detection circuit, resistance R4, the voltage at resistance R5 both ends and resistance R9, the electricity at resistance R10 both ends be present
Pressure all can be raised quickly, and protection voltage signal CU1 and CU2 will be reduced, the voltage difference between power supply VCC and voltage signal OV1
It will increase, turn on the PNP triode K1 in interlock protection circuit by resistance R3, PNP triode K1 colelctor electrodes and transmitting
Low-voltage is presented between pole, interlock protection circuit the first output end output voltage OV3 is high level, and PNP triode K2 is turned off,
Low level, the upper bridge drive signal of block is presented in motor drive signal SZ2, and NPN triode K3 is turned off, and current loop one is cut-off,
The electric current for flowing through NPN triode K3 and NPN triode K9 reduces, and NPN triode K3 and NPN triode K9 are protected,
Voltage difference increase between power supply VCC and voltage signal OV2, the poles of PNP tri- in interlock protection circuit are made by resistance R13
Pipe K6 is turned on, and low-voltage, the output end of interlock protection circuit second output electricity are presented between PNP triode K6 collector and emitters
Pressure OV4 is high level, and PNP triode K4 is turned off, motor drive signal SF2 presentation low levels, bridge drive signal in block,
NPN triode K5 is turned off, and current loop two is cut off, and the electric current for flowing through NPN triode K5 and NPN triode K11 reduces, right
NPN triode K5 and NPN triode K11 are protected.
The present invention has the beneficial effect that：
The present invention without main control chip and the relay of large volume, calculate by the control circuit and software control for avoiding complexity
Method, reduce the volume and cost of circuit, drive circuit uses single supply, avoid dual power supply driving, current sampling circuit without
Sensor and change-over circuit are needed, overcurrent is protected using interlock protection circuit, main circuit is cut off in time, avoids power
Main circuit and motor damage, improve reliability.
It will be understood by those skilled in the art that realizing all or part of flow of above-described embodiment method, meter can be passed through
Calculation machine program instructs the hardware of correlation to complete, and described program can be stored in computer-readable recording medium.Wherein, institute
Computer-readable recording medium is stated as disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.
Claims (10)
1. a kind of DC motor positive and negative rotation protects control circuit, including：Upper bridge drive circuit, lower bridge drive circuit, the main electricity of power
Road, over-current detection circuit and interlock protection circuit；Wherein motor positive rotaring signal SZ and reverse signal SF is connected to bridge driving electricity
The input on road, upper bridge drive circuit output motor drive signal SZ2, SF2 and lower bridge drive signal SZ3, SF3, lower bridge driving
Signal SZ3, SF3 are connected to lower bridge drive circuit input, lower bridge drive circuit output motor drive signal SZ4, SF4 and upper bridge
The motor drive signal SZ2 and SF2 of drive circuit output are connected to power main circuit and come controlled motor rotating, power main circuit
Output protection voltage signal CU1 connects the input of over-current detection circuit with CU2, and over-current detection circuit is cut off when electric current transfinites
Circuit, over-current detection circuit output voltage signal OV1 and OV2 are connected to the input of interlock protection circuit；Interlock protection circuit
According to voltage signal OV1 and OV2 the output voltage control signal OV3 and OV4 of input to upper bridge drive circuit control terminal, when defeated
The positive rotaring signal and reverse signal that enter while for high level or when there is over current of motor, the upper bridge driving electricity of control signal block
Road.
2. circuit as claimed in claim 1, it is characterised in that also including switched filter circuit, the positive rotaring signal SZ of motor and anti-
Rotaring signal SF is connected to the input of switched filter circuit, after switched filter circuit filters, output rotate forward filtering signal SZ1 and
Invert the input of bridge drive circuit in filtering signal SF1 connections；Switched filter circuit includes：Resistance R16, resistance R17, resistance
R21, resistance R22, electric capacity C1, electric capacity C2, NPN triode K12, NPN triode K7；Resistance R16 one end is that motor is just transferred the letter
Number SZ input, the resistance R16 other end one end with electric capacity C1, resistance R17 one end, NPN triode K12 base respectively
Pole connects, the electric capacity C1 other end, the resistance R17 other end and NPN triode K12 emitter stage with being all connected with power supply GND,
NPN triode K12 colelctor electrode exports SZ1 signals as output end；Resistance R21 one end inputs as motor reversal signal SF
End, one end with electric capacity C2, resistance R22 one end, NPN triode K7 base stage are connected the resistance R21 other end respectively, electric capacity
The C2 other end and resistance the R22 other end, GND is connected NPN triode K7 emitter stage with power supply, NPN triode K7
Colelctor electrode as output end export SF1 signals.
3. circuit as claimed in claim 2, it is characterised in that the upper bridge drive circuit includes：Resistance R2, resistance R15, electricity
Hinder R8, resistance R26, resistance R27, resistance R28, resistance R18, resistance R23, PNP triode K2, PNP triode K4；Resistance R2 mono-
End rotates forward filtering signal SZ1 as first input end access, and the resistance R2 other end is connected with PNP triode K2 base stage, even
Contact is the first control terminal of upper bridge drive circuit, and PNP triode K2 emitter stage is connected with power supply VCC, PNP triode K2's
Colelctor electrode is connected with resistance R8 one end, and one end with resistance R23, R27 one end are connected the resistance R8 other end respectively, connection
Point output motor drive signal SZ2, the R23 lower bridge drive signal SZ3 of other end output；Resistance R15 one end is defeated as second
Enter to terminate and be connected into reversion filtering signal SF1, the resistance R15 other end with PNP triode K4 base stage, tie point drives for upper bridge
Second control terminal of dynamic circuit, PNP triode K4 emitter stage are connected with power supply VCC, PNP triode K4 colelctor electrode and resistance
R26 one end connection, one end with resistance R28, R18 one end are connected the resistance R26 other end respectively, tie point output motor
Drive signal SF2, the R18 lower bridge drive signal SF3 of other end output.
4. circuit as claimed in claim 3, it is characterised in that the lower bridge drive circuit includes：Resistance R19, resistance R20,
Resistance R24, resistance R25, NPN triode K8, NPN triode K10；NPN triode K8 base stage connects with resistance R19 one end
Connect, the lower bridge drive signal SF3, NPN triode K8 of tie point input colelctor electrode and the R27 other end connect, and resistance R19's is another
One end is connected with resistance R20 one end, NPN triode K8 emitter stage, tie point output motor drive signal SF4, resistance R20
The other end GND is connected with power supply；NPN triode K10 base stage is connected with resistance R24 one end, the lower bridge of tie point input
Drive signal SZ3, NPN triode K10 colelctor electrode and the R28 other end connect, and the resistance R24 other end is with resistance R25's
One end, NPN triode K10 emitter stage connection, tie point output motor drive signal SZ4, resistance the R25 other end and power supply
Ground GND connections.
5. circuit as claimed in claim 4, it is characterised in that the power main circuit includes：The pole of NPN triode K3, NPN tri-
Pipe K5, NPN triode K9, NPN triode K11, diode D1, diode D2, diode D3, diode D4；Wherein, NPN tri-
Pole pipe K3 base stage input motor drive signal SZ2, NPN triode the K9 pole of base stage input motor drive signal SF4, NPN tri-
Pipe K3 emitter stage and the resistance R27 other end, NPN triode K8 colelctor electrode, NPN triode K9 colelctor electrode, diode
The positive pole connection of D1 anode, diode D3 negative electrode, direct current generator, NPN triode K9 emitter stage, diode D3 anode
GND is connected with power supply, and diode D1 negative electrode is connected with power supply VCC, NPN triode K3 current collection extremely power main circuit
First output end；NPN triode K5 base stage input motor drive signal SF2, NPN triode K11 base stage input motor drive
Dynamic signal SZ4, NPN triode K5 emitter stage and the resistance R28 other end, NPN triode K10 colelctor electrode, NPN triode
The negative pole connection of K11 colelctor electrode, diode D2 anode, diode D4 negative electrode, direct current generator, NPN triode K11 hair
Emitter-base bandgap grading, GND is connected diode D4 anode with power supply, and diode D2 negative electrode is connected with power supply VCC, NPN triode K5's
Second output end of current collection extremely power main circuit；First output end output protection voltage signal CU1 of power main circuit, power
Second output end output protection voltage signal CU2 of main circuit.
6. circuit as claimed in claim 5, it is characterised in that the over-current detection circuit includes：Resistance R4, resistance R5, electricity
Hinder R6, resistance R7, resistance R9, resistance R10, resistance R11, resistance R12；Wherein, resistance R6 one end and resistance R7 one end connect
Connect, tie point is connected for the first input end of over-current detection circuit with the first output end of power main circuit, and resistance R6's is another
End is connected with the R7 other end, R4 one end, R5 one end, and tie point is the first output end of over-current detection circuit, and R4's is another
One end and the R5 other end are connected with power supply VCC；Resistance R11 one end is connected with resistance R12 one end, and tie point is examined for excessively stream
Second input of slowdown monitoring circuit is connected with the second output end of power main circuit, the resistance R11 other end and the R12 other end,
R9 one end, R10 one end connection, tie point are the second output end of over-current detection circuit, and the R9 other end and R10's is another
End is connected with power supply VCC；The first input end of over-current detection circuit is connected with protection voltage signal CU1, over-current detection circuit
Second input is connected with protection voltage signal CU2, the first output end output voltage signal OV1, the second output end output voltage
Signal OV2.
7. circuit as claimed in claim 6, it is characterised in that the interlock protection circuit includes：Resistance R1, resistance R3, electricity
Hinder R13, resistance R14, PNP triode K1, PNP triode K6；Wherein, R3 one end is the first input end of interlock protection circuit
It is connected with the first output end of over-current detection circuit, the R3 other end and K1 base stage connect, PNP triode K1 emitter stage,
Resistance R1 one end is connected with power supply VCC, and PNP triode K1 colelctor electrode is connected with the resistance R1 other end, and tie point is mutual
First output end of lock protection circuit is connected with the first control terminal of upper bridge protection circuit；R13 one end is interlock protection circuit
The second input and the second output end of over-current detection circuit connect, the R13 other end and K6 base stage connect, the poles of PNP tri-
Pipe K6 emitter stage, resistance R14 one end are connected with power supply VCC, PNP triode K6 colelctor electrode and the resistance R14 other end
Connection, tie point are connected for the second output end of interlock protection circuit with the second control terminal of upper bridge protection circuit；Interlock protection
The first input end input voltage signal OV1 of circuit, the second input input voltage signal OV2 of interlock protection circuit, interlocking
First output end output voltage control signal OV3 of protection circuit, the second output end output voltage control of interlock protection circuit
Signal OV4, voltage control signal OV3 and OV4 connect the first control terminal and the second control terminal of bridge drive circuit respectively.
8. circuit as claimed in claim 7, it is characterised in that during motor normal operation, if positive rotaring signal SZ is high level,
Reverse signal SF is low level, and NPN triode K12 conductings, NPN triode K7 shut-offs, it is low level to rotate forward filtering signal SZ1,
Reversion filtering signal SF1 is high level, and PNP triode K2 conductings, PNP triode K4 shut-offs, SZ2 is high level, and SF2 is low electricity
Flat, SZ3 is high level, and SF3 is low level, and NPN triode K3 is turned on, NPN triode K5 shut-offs, NPN triode K8 shut-offs,
NPN triode K10 is turned on, and SZ4 is high level, and SF4 is low level, and NPN triode K11 conductings, NPN triode K9 is turned off, electric
Stream passes through power supply VCC, flows through resistance R4, resistance R5, resistance R6, resistance R7, NPN triode K3, direct current generator, NPN triode
GND, formation closed-loop path, motor rotate forward K11 with flowing into power supply；If positive rotaring signal SZ is low level, reverse signal SF is high
Level, NPN triode K7 conductings, NPN triode K12 shut-offs, it is high level to rotate forward filtering signal SZ1, reversion filtering signal SF1
It is low level, PNP triode K2 shut-offs, PNP triode K4 conductings, SZ2 is low level, and SF2 is high level, and SZ3 is low level,
SF3 is high level, and NPN triode K3 is turned off, NPN triode K5 conductings, NPN triode K8 conductings, NPN triode K10 shut-offs,
SZ4 is low level, and SF4 is high level, and NPN triode K11 is turned off, and NPN triode K9 conductings, electric current passes through power supply VCC, resistance
R9, resistance R10, resistance R11, resistance R12, NPN triode K5, direct current generator, NPN triode K9 flow into power supply ground GND, are formed
Closed-loop path, motor reversal.
9. circuit as claimed in claim 8, it is characterised in that during normal work, PNP triode K1 and PNP triode K6 are protected
The state of complete switching off is held, when there is excessively stream in motor, if motor rotates forward, resistance R9 and resistance R10 in over-current detection circuit
The voltage at both ends is zero, and the voltage rise at resistance R4 and resistance R5 both ends, protection voltage signal CU1 is reduced, and protects voltage signal
CU2 is constant, and the voltage difference between power supply VCC and voltage signal OV2 is zero, PNP triode K6 shut-offs, power supply VCC and voltage letter
Voltage difference increase between number OV1, turns on the PNP triode K1 in interlock protection circuit by resistance R3, PNP triode K1
Low-voltage is presented between collector and emitter, interlock protection circuit the first output end output voltage OV3 is high level, by PNP
Triode K2 is turned off, and low level is presented in motor drive signal SZ2, realizes the block to upper bridge drive signal, and NPN triode K3 is closed
Disconnected, the electric current for flowing through motor is cut off；If motor reversal, the voltage of resistance R4 and resistance R5 both ends in over-current detection circuit
It is zero, the voltage rise at resistance R9 and resistance R10 both ends, protection voltage signal CU2 is reduced, and protection voltage signal CU1 is constant, electricity
Voltage difference between source VCC and voltage signal OV1 is zero, PNP triode K1 shut-offs, between power supply VCC and voltage signal OV2
Voltage difference increase, turns on the PNP triode K6 in interlock protection circuit by resistance R13, PNP triode K6 colelctor electrodes and hair
Low-voltage is presented between emitter-base bandgap grading, interlock protection circuit the second output end output voltage OV4 is high level, and PNP triode K4 is closed
Disconnected, low level is presented in motor drive signal SF2, realizes the block to upper bridge drive signal, NPN triode K5 shut-offs, flows through electricity
The electric current of machine is cut off.
10. circuit as claimed in claim 9, it is characterised in that when simultaneously high electricity occurs in positive rotaring signal SZ and reverse signal SF
Usually, due to over-current detection circuit, resistance R4, the voltage at resistance R5 both ends and resistance R9, the voltage liter at resistance R10 both ends be present
Height, protection voltage signal CU1 and CU2 are reduced, and the voltage difference increase between power supply VCC and voltage signal OV1, are made by resistance R3
PNP triode K1 in interlock protection circuit is turned on, and low-voltage is presented between PNP triode K1 collector and emitters, is interlocked
Protection circuit the first output end output voltage OV3 is high level, and PNP triode K2 is turned off, and motor drive signal SZ2 presents low
Level, bridge drive signal in block, NPN triode K3 shut-offs, motor rotate forward passage and are cut off；Power supply VCC and voltage signal OV2
Between voltage difference increase, turn on the PNP triode K6 in interlock protection circuit by resistance R13, PNP triode K6
Low-voltage is presented between collector and emitter, interlock protection circuit the second output end output voltage OV4 is high level, by PNP
Triode K4 is turned off, motor drive signal SF2 presentation low levels, bridge drive signal in block, NPN triode K5 shut-offs, motor
Inverting channel is cut off.
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| CN201710788798.4A CN107546722B (en) | 2017-09-01 | 2017-09-01 | A kind of DC motor positive and negative rotation protection control circuit |
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| CN108736446A (en) * | 2018-05-29 | 2018-11-02 | 广东威灵电机制造有限公司 | Guard method, protection system and the permanent magnet synchronous motor of permanent magnet synchronous motor |
| CN109066597A (en) * | 2018-09-25 | 2018-12-21 | 盖泽工业（天津）有限公司 | A kind of driving of automatic door motor and current foldback circuit |
| CN109150024A (en) * | 2018-09-19 | 2019-01-04 | 北京机械设备研究所 | A kind of brshless DC motor two-way control circuit |
| CN111880399A (en) * | 2020-06-30 | 2020-11-03 | 海益（厦门）建材工业有限公司 | Lifting circuit and lifting device capable of achieving anti-clamping |
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| CN109150024B (en) * | 2018-09-19 | 2020-08-21 | 北京机械设备研究所 | Bidirectional control circuit of brushless direct current motor |
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| CN107546722B (en) | 2019-04-19 |
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