CN109120193A - Motor-drive circuit and electrical equipment - Google Patents
Motor-drive circuit and electrical equipment Download PDFInfo
- Publication number
- CN109120193A CN109120193A CN201811165785.2A CN201811165785A CN109120193A CN 109120193 A CN109120193 A CN 109120193A CN 201811165785 A CN201811165785 A CN 201811165785A CN 109120193 A CN109120193 A CN 109120193A
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- motor
- triode
- connect
- diode
- relay
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
- H02P7/05—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors by means of electronic switching
Abstract
The invention discloses a kind of motor-drive circuit and electrical equipments, wherein the motor-drive circuit includes: motor, switching module and first switch；The first end of motor is connect with one end of first switch and the first power supply respectively by switching module, and the second end of motor is connect with one end of first switch and the first power supply respectively by switching module；Switching module, for controlling the switching that signal control motor rotates and reverse according to motor positive and inverse；First switch rotates forward the on-off in circuit or reversion circuit for controlling motor.The connection for rotating forward circuit or inverting circuit of motor is realized in above-mentioned motor-drive circuit by switching module, the on-off for rotating forward circuit or inverting circuit is realized by first switch again later, to realize the positive and negative rotation of motor, motor-drive circuit is simple, solves the problems, such as that push-rod electric machine control circuit is complicated in the prior art.
Description
Technical field
The present invention relates to technical field of electric appliances, and in particular to a kind of motor-drive circuit and electrical equipment.
Background technique
The automatic open-close of kitchen ventilator smoke deflector, Chinese patent text are realized in the positive and negative rotation that range hood usually passes through push-rod electric machine
It offers CN204406073U and discloses a kind of control circuit of range hood electric pushrod, including DC power supply, DC brush
Motor, current detecting unit and switch control unit, brush direct current motor driving motor putter action further include having several relays
Device, switch control unit receive externally input control signal and by control several relays so that DC power supply and
Brush direct current motor just connects or is reversely connected that brush direct current motor is made to rotate forward or invert, and current detecting unit detection direct current has
Obtained current signal is simultaneously input to switch control unit and is handled by the size of current of brush motor, switch control unit according to
The size output control signal of current signal controls several actuatings of relay to control brush direct current motor operation.
Several above-mentioned relays are 3 relays, make push-rod electric machine positive and negative rotation with three relay assembly controllers,
Excessive relay makes the connection type of circuit more complex.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of motor-drive circuit and electrical equipment, to solve the prior art
The problem of middle push-rod electric machine control circuit complexity.
The embodiment of the invention provides a kind of motor-drive circuits, comprising: motor, switching module and first switch；Its
In, the first end of the motor is connect with one end of the first switch and the first power supply respectively by the switching module, institute
The second end for stating motor is connect with described one end of the first switch and first power supply respectively by the switching module；
The switching module controls the switching that the motor rotates and reverse for controlling signal according to motor positive and inverse；Described first
Switch rotates forward the on-off in circuit or reversion circuit for controlling motor.
Optionally, the switching module includes the first relay, the first driving unit, the second relay and the second driving
Unit；Wherein, the first end of the coil of first relay is connect with second source, and the of the coil of first relay
Two ends are connect with the first driving unit, and the moving contact of first relay is connect with the first end of the motor, and described first
The normally open contact of relay is connect with first power supply, and the normally closed interlock of first relay and the first switch connect
It connects；The first end of the coil of second relay is connect with third power supply, the second end of the coil of second relay with
The connection of second driving unit, the moving contact of second relay are connect with the second end of the motor, second relay
Normally open contact connect with first power supply, the normally closed interlock of second relay is connect with the first switch.
Optionally, the switching module includes third relay and third driving unit, wherein the third relay
The first end of coil is connect with the 4th power supply, and the second end of the coil of the third relay is connect with third driving unit；Institute
The first moving contact for stating third relay is connect with the first end of the motor, the second moving contact of the third relay and institute
State the second end connection of motor；The first normally open contact and the second normally closed interlock of the third relay and the 4th power supply or
The connection of first switch described in person, the first normally closed interlock and the second normally open contact and the first switch or the 4th power supply connect
It connects.
Optionally, the first driving unit include the first triode, the second triode, first diode, the second diode and
First storage capacitor；Wherein, the first end of the first diode is connect with first motor positive and negative rotation control signal, and described first
The second end of diode respectively with the first end of the first storage capacitor, the first end of second diode and the described 1st
The control terminal of pole pipe connects；The second end of second diode is connect with the control terminal of second triode；Described second
The first end of triode is connect with the second end of the coil of the first relay, the second end of second triode and described first
The first end of triode connects；The second end of first triode and the second end of first storage capacitor connect with ground wire
It connects；
And/or
Second driving unit includes third transistor, the 4th triode, third diode, the 4th diode and the second energy storage
Capacitor；Wherein, the first end of the third diode is connect with the second motor positive and inverse control signal, the third diode
The second end control with the first end of the second storage capacitor, the first end and the third transistor of the 4th diode respectively
End connection processed；The second end of 4th diode is connect with the control terminal of the 4th triode；4th triode
First end is connect with the second end of the coil of the second relay, second end and the third transistor of the 4th triode
First end connection；The second end of the third transistor and the second end of second storage capacitor are connect with ground wire；
And/or
Third driving unit includes the 5th triode, the 6th triode, the 5th diode, the 6th diode and third energy storage
Capacitor；Wherein, the first end of the 5th diode is connect with third motor positive and inverse control signal, the 5th diode
The second end control with the first end of third storage capacitor, the first end of the 6th diode and the 5th triode respectively
End connection processed；The second end of 6th diode is connect with the control terminal of the 6th triode；6th triode
First end is connect with the second end of the coil of third relay, second end and the 5th triode of the 6th triode
First end connection；The second end of 5th triode and the second end of the third storage capacitor are connect with ground wire.
Optionally, further includes: current-limiting resistance；
The current-limiting resistance is connected in series in the control terminal of first triode and/or the control terminal of the second triode；
And/or
The current-limiting resistance is connected in series in the control terminal of the third transistor and/or the control terminal of the 4th triode；
And/or
The current-limiting resistance is connected in series in the control terminal of the 5th triode and/or the control terminal of the 6th triode.
Optionally, further includes: anti-error conducting resistance；
The anti-error conducting resistance is connected to the control terminal of first triode and the second end of first triode
Between；
And/or
The anti-error conducting resistance is connected to the control terminal of the third transistor and the second end of the third transistor
Between；
And/or
The anti-error conducting resistance is connected to the control terminal of the 5th triode and the second end of the 5th triode
Between.
Optionally, further includes: discharge resistance；
The discharge resistance is connected in parallel with first storage capacitor；
And/or
The discharge resistance is connected in parallel with second storage capacitor；
And/or
The discharge resistance is connected in parallel with the third storage capacitor.
It optionally, further include protection capacitor and protection diode；
The protection capacitor is connected in series between first motor positive and negative rotation control signal and first diode, the protection
The second end of diode and the first end of first diode connect, and the first end of the protection diode is connect with ground wire；
And/or
The protection capacitor is connected in series between the second motor positive and inverse control signal and third diode, the protection
The second end of diode is connect with the first end of third diode, and the first end of the protection diode is connect with ground wire；
And/or
The protection capacitor is connected in series between third motor positive and inverse control signal and the 5th diode, the protection
The second end of diode is connect with the first end of the 5th diode, and the first end of the protection diode is connect with ground wire.
Optionally, further includes: motor filter circuit is connect with the motor parallel.
Optionally, further includes: detection unit is connect with the first switch, for detecting the electric current of the motor.
Optionally, the first switch includes switching transistor, and the first end and switching module of the switching transistor connect
It connecing, the second end of the switching transistor is connect with detection unit, and the control terminal of the switching transistor is connect with switching signal,
The switching signal includes pwm signal.
The embodiment of the invention also provides a kind of electrical equipments, including the motor-drive circuit as described in any of the above-described.
Optionally, the electrical equipment includes range hood.
Technical solution of the present invention has the advantages that
Motor-drive circuit provided by the invention, comprising: motor, switching module and first switch；Wherein, the motor
First end connect respectively with one end of the first switch and the first power supply by the switching module, the second of the motor
End is connect with described one end of the first switch and first power supply respectively by the switching module；The switching mould
Block controls the switching that the motor rotates and reverse for controlling signal according to motor positive and inverse；The first switch, for controlling
Motor processed rotates forward circuit or inverts the on-off in circuit.The rotating forward of motor is realized in above-mentioned motor-drive circuit by switching module
The connection that circuit perhaps inverts circuit realizes the on-off for rotating forward circuit or inverting circuit by first switch again later, thus
The positive and negative rotation of motor is realized, motor-drive circuit is simple, solves that push-rod electric machine control circuit in the prior art is complicated to ask
Topic.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of a specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 2 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 3 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 4 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 5 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 6 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 7 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention；
Fig. 8 is the circuit diagram of another specific example of motor-drive circuit in the embodiment of the present invention.
Appended drawing reference:
M, motor；2, switching module；21, the first driving unit；22, the second driving unit；3, first switch；4, detection is single
Member；V1, the first power supply；V2, second source；V3, third power supply；V4, the 4th power supply；K1, the first relay；K2, the second relay
Device；K3, third relay；Q2, switching transistor；Q5, the first triode；Q4, the second triode；Q3, third transistor；Q1,
4th triode；Q6, the 5th triode；Q7, the 6th triode；D1, first diode；D2, the second diode；D6, the three or two
Pole pipe；D7, the 4th diode；D9, the 5th diode；D10, the 6th diode；D3, the first protection diode；D8, the second protection
Diode；D11, third protection diode；D4, the first relay protection diode；D5, the second relay protection diode；
EC1, the first storage capacitor；EC2, the second storage capacitor；EC3, third storage capacitor；R3, the first current-limiting resistance；R1, the second limit
Leakage resistance；R10, third current-limiting resistance；R8, the 4th current-limiting resistance；R7, the 7th current-limiting resistance；R4, the first anti-error conducting resistance；
R9, the second anti-error conducting resistance；R2, the first discharge resistance；R11, the second discharge resistance；R5, filter resistance；R6, detection electricity
Resistance；R12, the 5th current-limiting resistance；R13, the 6th current-limiting resistance；The anti-error conducting resistance of R14, third；R15, third discharge resistance；
C1, the first protection capacitor；C3, the second protection capacitor；C2, filter capacitor；C4, third protect capacitor；S1, switch control signal；
S2, first motor positive and negative rotation control signal；S3, the second motor positive and inverse control signal；S4, detection signal；S5, third motor are just
Reverse control signal.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, can also can also be two indirectly connected through an intermediary
Connection inside element can be wireless connection, be also possible to wired connection.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.It is further to note that term " first ", " the
Two ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
The present embodiment provides a kind of motor-drive circuit, be applied to realize in motor (such as push-rod electric machine) rotating forward of motor and
Reversion solves the problems, such as that circuit for controlling motor is complicated in the prior art.As shown in Figure 1, the motor-drive circuit includes: motor
M, switching module 2 and first switch 3.The first end of motor M by switching module 2 respectively with one end of first switch 3 and the
The second end of the connection of one power supply, motor M is connect with one end of first switch 3 and the first power supply respectively by switching module 2；Switching
Module 2, for controlling the switching that signal control motor M is rotated and reverse according to motor positive and inverse；First switch 3, for controlling
Motor M rotates forward circuit or inverts the on-off in circuit.
The connection for rotating forward circuit or inverting circuit of motor is realized in above-mentioned motor-drive circuit by switching module, it
The on-off for rotating forward circuit or inverting circuit is realized by first switch again afterwards, to realize the positive and negative rotation of motor, motor is driven
Dynamic circuit is simple, solves the problems, such as that push-rod electric machine control circuit is complicated in the prior art.
In an alternative embodiment, specifically: for motor M when rotating forward, the first end of motor M passes through switching module and first
The second end of power supply V1 connection, motor M is connected by one end of switching module and first switch, completes the company that motor rotates forward circuit
It connects, at this point, conducting first switch realizes the rotating forward of motor；Motor M in reversion, the first end of motor M by switching module with
One end of first switch connects, and the second end of motor M is connect by switching module with the first power supply V1, completes motor reversal and returns
The connection on road, at this point, conducting first switch realizes the reversion of motor.Certainly, in other embodiments, when the first end of motor M
It is connect with the first power supply and when second end is connect with first switch, can also be motor reversal circuit；When first end and first switch
One end connection and second end when being connect with the first power supply, then be motor rotating forward circuit.Specific connection type and motor positive and inverse
Corresponding relationship can be rationally arranged as needed, and the present embodiment is not construed as limiting this.
In an alternative embodiment, motor can be push-rod electric machine, and push-rod electric machine is usually applied in household electrical appliance, such as oil smoke
Machine, the positive and negative rotation of push-rod electric machine make smoke deflector automatic open-close and the closing of kitchen ventilator, realize the adjusting of kitchen ventilator smoke deflector.When
So, in other embodiments, motor can be also the motor of other achievable positive and negative rotations in the prior art.It should be noted that electric
The application field of machine is also not limited to household electrical appliance, can also be applied to realize other fields of control by motor positive and inverse,
The present embodiment is not construed as limiting this.It should also be noted that, the motor-drive circuit in the present embodiment is not limited to push rod electricity
Machine can be extended in other direct current generators.
In an alternative embodiment, as shown in Fig. 2, first switch 3 can be switching transistor Q2, specifically, three pole of switch
Pipe Q2 can be NPN type triode, and the collector of switching transistor Q2 is connect with switching module, and emitter is connect with ground wire GND, base
Pole is connect with switch control signal S1, is controlled motor rotating forward circuit according to switch control signal or is inverted the on-off in circuit, and three
The switching speed of pole pipe is fast, and production cost is low.Certainly, in other embodiments, first switch can also be the triode of positive-negative-positive,
The either switching devices such as the higher metal-oxide-semiconductor of production cost or relay, as needed rationally setting.
In an alternative embodiment, switch control signal can be pwm signal, in this way in motor rotating forward or reversion process
PWM speed regulation is carried out to motor, control mode is simple, convenient, easy to operate.Certainly, in other embodiments, switch control signal is also
It can be high potential, rationally setting as needed.
In an alternative embodiment, as shown in Fig. 2, switching module 2 include the first relay K1, the first driving unit 21,
Second relay K2 and the second driving unit 22.The first end of the coil of first relay K1 is connect with second source V2, the
The second end of the coil of one relay K1 is connect with the first driving unit 21, and the of the moving contact of the first relay K1 and motor M
One end A connection, the normally open contact of the first relay K1 are connect with the first power supply V1, the normally closed interlock and first of the first relay K1
Switch 3 connects；The first end of the coil of second relay K2 is connect with third power supply V3, and the second of the coil of the second relay K2
End is connect with the second driving unit 22, and the moving contact of the second relay 24 is connect with the second end B of motor M, the second relay K2
Normally open contact connect with the first power supply V1, the normally closed interlock of the second relay K2 is connect with first switch 3.In the present embodiment
In, as shown in figure 3, second source V2 and third power supply V3 shares a power supply VCC, it can simplify circuit in this way, reduce production
Cost；Certainly, in other embodiments, second source and third power supply can also be separately connected two power supplys, as needed rationally
Setting.
In an alternative embodiment, the first power supply V1, second source V2 and third power supply V3 can share a power supply and supply
Electricity, voltage value can be 24V or 12V；Certainly, it can also be separately connected different power supplys as needed, voltage value may be configured as phase
It is not identical with may be alternatively provided as, voltage value is rationally set as needed.
First switch in above-mentioned switching module connects ground wire, and normally closed interlock connects first switch, normally open contact connection electricity
The safety and reliability that source, in this way setting improve entire circuit.Certainly, in other embodiments, normally open contact can be with
One switch connection, normally closed interlock can connect to power supply, and setting in this way can also realize identical function, and rationally setting is as needed
It can.
Switching module in above-mentioned motor-drive circuit, which only passes through two relays, can realize rotating forward circuit or reversion
The connection in circuit, circuit structure are simple；An actuating of relay is only needed in rotating forward or reversion, control mode is simple, saves
Electric energy reduces production cost.
In an alternative embodiment, as shown in figure 3, the first driving unit 21 includes the first triode Q5, the second triode
Q4, first diode D1, the second diode D2 and the first storage capacitor EC1.Wherein, the first end of first diode D1 and first
Motor positive and inverse control signal S2 connection, the second end of first diode D1 respectively with the first end of the first storage capacitor EC1,
The first end of second diode D2 and the connection of the control terminal of the first triode Q5；The second end and the two or three of second diode D2
The control terminal of pole pipe Q4 connects；The first end of second triode Q4 is connect with the second end of the coil of the first relay K1, and second
The second end of triode Q4 is connect with the first end of the first triode Q5；The second end and the first storage capacitor of first triode Q5
The second end of EC1 is connect with ground wire GND.Above-mentioned first driving circuit is in the high electricity of first motor positive and negative rotation control signal S2 output
Usually, the first triode Q5 is first connected, and later, is connected after making the second triode Q4 due to the second diode D2, to two three
The coil that pole pipe (Q5 and Q4) simultaneously turns on rear first relay K1 obtains electric, the first relay K1 movement.First relay K1's
Moving contact is connect with normally open contact, to be connected to the first power supply V1；Second relay is failure to actuate, moving contact still with normally closed touching
The connection that motor rotates forward circuit is completed in head connection；Later, the rotating forward of motor can be realized under the control of first switch.
As shown in figure 3, the second driving unit 22 includes third transistor Q3, the 4th triode Q1, third diode D6, the
Four diode D7 and the second storage capacitor EC2.Wherein, the first end of third diode D6 and the second motor positive and inverse control signal
S3 connection, the second end of third diode D6 respectively with the first end of the second storage capacitor EC2, the first end of the 4th diode D7
And the control terminal connection of third transistor Q3；The second end of 4th diode D7 is connect with the control terminal of the 4th triode Q1；
The first end of 4th triode Q1 is connect with the second end of the coil of the second relay K2, the second end of the 4th triode Q1 with
The first end of third transistor Q3 connects；The second end of third transistor Q3 and the second end of the second storage capacitor EC2 with ground
Line GND connection.Above-mentioned second driving circuit is in the second motor positive and inverse control signal S3 output high level, third transistor
Q3 is first connected, and later, is connected after making the 4th triode Q1 due to the 4th diode D7, simultaneously to two triodes (Q3 and Q1)
The coil of the second relay K2 obtains electric, second actuating of relay after conducting.The moving contact of second relay is connect with normally open contact,
To be connected to the first power supply V1；First relay K1 is failure to actuate, and moving contact is still connect with normally closed interlock, completes motor reversal
The connection in circuit；Later, the reversion of motor can be realized under the control of first switch.
Specifically, the first storage capacitor EC1 and the second storage capacitor EC2 is electrolytic capacitor, the capacitance of electrolytic capacitor compared with
Greatly, and cost is relatively low；Certainly, in other embodiments, other capacitors in the prior art, such as tantalum capacitor, root also can be used
According to needs rationally setting.
Pass through two triode series controls, one relay in above-mentioned first driving circuit and the second driving circuit,
In the case of any one component damage, motor will not be malfunctioned, and safety coefficient is high；Also, two groups of concatenated triode difference
Two relays of parallel drive, while two power supply lines of motor are controlled, it can guarantee motor not relay damaged one
It can be powered, safety is high.
It should be noted that the first triode Q5, the second triode Q4, third transistor Q3 and the 4th triode Q1 are equal
For the triode of NPN type；Certainly, in other embodiments, triode can also be PNP type, can also realize technology effect of the invention
Fruit specifically can be rationally arranged as needed.
In alternative embodiment, motor-drive circuit further include: current-limiting resistance；Current-limiting resistance is connected in series in first
The control terminal of the control terminal of triode Q5 and/or the second triode Q4.And/or current-limiting resistance is connected in series in third transistor
The control terminal of the control terminal of Q3 and/or the 4th triode Q1.Series resistance is connected in series in the control terminal (base stage) of triode, rises
To the effect of protection triode.
Specifically, as shown in figure 4, current-limiting resistance is connected in series in the control terminal of the first triode Q5, current limliting herein is electric
Resistance is expressed as the first current-limiting resistance R3；Current-limiting resistance is connected in series in the control terminal of the second triode Q4, current-limiting resistance herein
It is expressed as the second current-limiting resistance R1；Current-limiting resistance is connected in series in the control terminal of third transistor Q3, current-limiting resistance table herein
It is shown as third current-limiting resistance R10；Current-limiting resistance is connected in series in the control terminal of the 4th triode Q1, and current-limiting resistance herein indicates
For the 4th current-limiting resistance R8.Certainly, in other embodiments, current-limiting resistance can be also only arranged to the control of the first triode Q5
The control terminal at end and third transistor Q3, as needed rationally setting.
In another alternative embodiment, as shown in figure 4, first switch is switching transistor Q2, motor-drive circuit is also
Including the current-limiting resistance being set in first switch control terminal.Specifically, current-limiting resistance herein is expressed as the 7th current-limiting resistance
Between the control terminal for being connected in series in switching transistor Q2 and switch control signal S1 of R7, the 7th current-limiting resistance R7.
It should be noted that the resistance value of current-limiting resistance can be set as identical on different setting positions according to actual needs
Or different resistance value.It should also be noted that, the position of current-limiting resistance is not limited to described in the present embodiment attached drawing
The technology that the control terminal of position, current-limiting resistance and triode is directly connected in series or is connected in series indirectly by other components
Scheme is each fallen in the scope of the present invention.
In another alternative embodiment, motor-drive circuit further include: anti-error conducting resistance；Anti-error conducting resistance connection
Between the control terminal of the first triode Q5 and the second end of the first triode Q5；And/or anti-error conducting resistance is connected to third
Between the control terminal of triode Q3 and the second end of third transistor Q3.Anti-error conducting resistance be set to triode control terminal and
Between second end, triode is misleaded as caused by interference etc., improves the reliability of motor-drive circuit.
Specifically, as shown in figure 4, anti-error conducting resistance is connected to the control terminal and the first triode Q5 of the first triode Q5
Second end between, anti-error conducting resistance herein is expressed as the first anti-error conducting resistance R4；Anti-error conducting resistance is connected to
Between the control terminal of three triode Q3 and the second end of third transistor Q3, it is anti-error that anti-error conducting resistance herein is expressed as second
Conducting resistance R9.Certainly, in other embodiments, anti-error conducting resistance can be also only arranged at the first triode Q5 or only
It is set at third transistor Q3, as needed rationally setting.
In another alternative embodiment, motor-drive circuit further include: discharge resistance；Discharge resistance and the first energy storage electricity
Hold EC1 to be connected in parallel；And/or discharge resistance is connected in parallel with the second storage capacitor EC2.Discharge resistance is connect with storage capacitor,
Discharge loop is provided for storage capacitor, reduces discharge time.
Specifically, as shown in figure 4, discharge resistance is connected in parallel with the first storage capacitor EC1, discharge resistance herein is indicated
For the first discharge resistance R2；Discharge resistance is also connected in parallel with the second storage capacitor EC2, and discharge resistance herein is expressed as second
Discharge resistance R11.Certainly, in other embodiments, can also discharge resistance is only in parallel with the first storage capacitor EC1 or only with
Second storage capacitor EC2 is in parallel, as needed rationally setting.
In another alternative embodiment, in order to further increase the safety and reliability of motor-drive circuit, motor
Positive and negative rotation is controlled signal and is driven using square-wave signal, at this point, motor-drive circuit further include: protection capacitor and protection diode；
Protection capacitor is connected in series between first motor positive and negative rotation control signal S2 and first diode D1, and the second of protection diode
End is connect with the first end of first diode D1, and the first end of protection diode is connect with ground wire；And/or protection capacitor series connection
It is connected between the second motor positive and inverse control signal S3 and third diode D6, the second end of protection diode and the three or two
The first end of pole pipe D6 connects, and the first end of protection diode is connect with ground wire.First motor positive and negative rotation controls signal S2 and the
Two motor positive and inverses control signal S3 and can be provided by control chip, in order to protect capacitor and protection diode to prevent control chip
The damage of the components such as triode or relay is caused when damage.Specifically, when controlling wafer damage, it will usually export one
A high potential or low potential, due to protecting the buffer action of capacitor, the motor positive and inverse signal for no matter controlling chip output is
High potential or low potential, motor positive and inverse signal can not reach triode control terminal, to play a protective role.
Specifically, as shown in figure 4, protection capacitor and protection diode are set to first motor positive and negative rotation control data side
When, protection capacitor is expressed as the first protection capacitor C1, and protection diode is expressed as the first protection diode D3.First protection capacitor
C1 is connected in series between first motor positive and negative rotation control signal S2 and first diode D1, and the second of the first protection diode D3
End (cathode) is connect with the first end (anode) of first diode D1, the first end (anode) and ground of the first protection diode D3
Line GND connection.
As shown in figure 4, when protection capacitor and protection diode are set to the second motor positive and inverse control data side, protection electricity
Appearance is expressed as the second protection capacitor C3, and protection diode is expressed as the second protection diode D8.Second protection capacitor C3 series connection connects
It is connected between the second motor positive and inverse control signal S3 and third diode D6, the second end (cathode) of the second protection diode D8
It is connect with the first end (anode) of third diode D6, the first end (anode) of the second protection diode D8 is connect with ground wire GND.
In another alternative embodiment, as shown in figure 4, motor-drive circuit further include: two pole of the first relay protection
Pipe D4 is connected in parallel with the first relay coil, for protecting the first relay coil.Specifically, the first relay protection two
The cathode of pole pipe D4 is connect with the first end of the first relay coil, and anode is connect with the second end of the first relay coil.
In another alternative embodiment, as shown in figure 4, motor-drive circuit further include: two pole of the second relay protection
Pipe D5 is connected in parallel with the second relay coil, for protecting the second relay coil.Specifically, the second relay protection two
The cathode of pole pipe D5 is connect with the first end of the second relay K2 coil, and the second end of anode and the second relay K2 coil connects
It connects.
In another alternative embodiment, as shown in figure 4, motor-drive circuit further include: motor filter module, with motor
It is connected in parallel, specifically includes the filter resistance R5 and filter capacitor C2 being serially connected, for filtering out in motor commutation and rotation
Relevant interference prevents motor sparking from causing to damage to motor.
In another alternative embodiment, as shown in figure 5, motor-drive circuit further include: detection unit 4 is opened with first
3 connections are closed, for detecting the electric current of motor M.Specifically, as shown in fig. 6, detection unit can be detection resistance R6, motor is detected
Electric current and the electric current that will test be converted to voltage, by the detection signal S4 connection of the voltage and controller, be convenient for controller
Carry out subsequent processing；Certainly, in other embodiments, it can be also other detection devices in the prior art, rationally set as needed
It sets.
In another alternative embodiment, motor-drive circuit further include: controller is connect with motor-drive circuit, is used
In the current control motor according to motor.Specifically, controller can be control chip, can be with switch control signal S1, motor just
Reverse control signal (S2 and S3) shares the same control chip, can reduce production cost in this way.Certainly, in other embodiments
In, each signal can also be separately connected multiple control chips, as needed rationally setting.
Controller controls motor according to the electric current detected, above-mentioned control may include motor occur stall or
Smoke deflector movement in kitchen ventilator controls motor stalls afterwards in place.For example, current of electric can be shown when stall occurs for motor
It writes and increases, the voltage detected on detection resistance R6 at this time also will increase, and controller disconnects electric motor loop according to the voltage, make electricity
Machine stops operating.In another example the position signal of smoke deflector is sent to controller by smoke deflector position detecting device in kitchen ventilator, when
After smoke deflector is moved to suitable position, controller controls motor stalls, so that smoke deflector stops at the position.
Specifically, controller can realize the disconnection in entire circuit by the travel switch inside control push-rod electric machine, from
And realize motor stalls；Signal or switch control signal can also be controlled by motor positive and inverse to realize the disconnected of circuit
It opens, realizes motor stalls；Specific control mode can be rationally arranged according to actual needs, and the present embodiment is not construed as limiting this.
Such as the circuit diagram that Fig. 7 is a specific example of motor-drive circuit in the present embodiment, it is discussed in detail by taking Fig. 7 as an example
The working principle of the motor-drive circuit.M in Fig. 7 indicates push-rod electric machine, and the voltage value of power supply VCC can be 24V or 12V.
The normally closed point of first relay K1 is M-, and the normally closed point of the second relay K2 is M-；A termination M+, B of push-rod electric machine terminate M-
When, push-rod electric machine rotates forward；When A termination M-, B termination M+ of push-rod electric machine, push-rod electric machine reversion.
When push-rod electric machine rotates forward, the second relay K2 is failure to actuate, and the end B of motor is connected to the normally closed point of the second relay K2
M-, relay driving square wave export a fixed voltage after C1 and diode D1, D2, EC1 rectifying and wave-filtering, and the voltage is same
When driving triode Q4, Q5, the first relay K1 by normally closed point is connected to M+ after triode Q4, Q5 are opened.I/O mouthfuls of driving provides height
Level is connected by triode Q2, and M- is made to be connected to GND, and the end A of motor is M+ at this time, and the end B is M-, and motor rotates forward.
When push-rod electric machine inverts, the first relay K1 is failure to actuate, and the end A of motor is connected to the normally closed point of the first relay K1
M-, relay driving square wave export a fixed voltage after C3 and diode D6, D7, EC2 rectifying and wave-filtering, and the voltage is same
When driving triode Q1, Q3, the second relay K2 by normally closed point is connected to M+ after triode Q1, Q3 are opened.I/O mouthfuls of driving provides height
Level is connected by triode Q2, and M- is made to be connected to GND, and the end A of motor is M- at this time, and the end B is M+, motor reversal.
Motor-drive circuit in the prior art in the case where component damage, the voltage at push-rod electric machine both ends not by
Control, the rotation of push-rod electric machine is uncontrolled, and such smoke deflector might have the risk hurted sb.'s feelings, at the same motor may be constantly in it is stifled
Turn state and damage motor, even results in the mainboard overload powered to motor.Above-mentioned motor-drive circuit in the present embodiment,
One chip I/O mouthfuls of controller two concatenated triodes drive relay, damage in a triode and chip I/O mouthfuls
In the case of, motor will not be powered；Two concatenated triode parallel drives, two relays, while controlling two power supplys of motor
Line, safety is high, guarantees that motor will not be powered relay damaged one；Any two component damage, relay
It can not be attracted, load will not malfunction；Two triode series control relays, in any two component damage,
Motor will not malfunction, and safety coefficient is high, be suitable for kitchen ventilator push-rod electric machine driving circuit, and safety coefficient is high.
It should be noted that controlling the technical solution of a relay by three even more concatenated triodes
Belong to present inventive concept, these technical solutions are each fallen in protection scope defined by the present invention.
In another alternative embodiment, switching module 2 includes third relay K3 and third driving unit；Wherein,
The first end of the coil of three relay K3 is connect with the 4th power supply V4, and the second end and third of the coil of third relay K3 drive
Unit connection；The first moving contact of third relay K3 is connect with the first end of motor M, the second moving contact of third relay K3
It is connect with the second end of motor M；The first normally open contact and the second normally closed interlock and the 4th power supply of third relay K3 or
One switch connection, the first normally closed interlock and the second normally open contact are connect with first switch or the 4th power supply.
Specifically, as shown in figure 8, the first normally open contact and the second normally closed interlock of third relay and the 4th power supply connect
Connect, the first normally closed interlock and the second normally open contact are connect with first switch, in this way connection so that third relay coil must not
In the case where electricity, the first normally closed interlock connects first switch, and the second normally closed interlock connects the 4th power supply, and motor reversal circuit connects
It connects, in first switch conducting, motor realizes reversion；Conversely, in the case where third relay coil obtains electric, the first normally opened touching
Head the 4th power supply of connection, the second normally open contact connect first switch, and motor rotates forward circuit connection, in first switch conducting, electricity
Machine, which is realized, to be rotated forward.Certainly, in other embodiments, the first normally open contact of third relay and the second normally closed interlock can also be with
One switch connection, the first normally closed interlock and the second normally open contact are then connect with the 4th power supply, at this point, third relay coil must not
When electric, motor rotates forward circuit connection, when coil obtains electric, the connection of motor reversal circuit；Setting can also realize identical function in this way,
Specific connection type can be rationally arranged as needed.The switching module only passes through two groups of switches of a dpdt relay
The switching in motor positive and inverse circuit is realized in linkage, is replaced two single-pole double-throw relays using dpdt relay, is saved peace
Space is filled, production cost is reduced.
As shown in figure 8, third driving unit includes the 5th triode Q6, the 6th triode Q7, the 5th diode D9, the 6th
Diode D10 and third storage capacitor EC3；Wherein, the first end of the 5th diode D9 and third motor positive and inverse control signal
S5 connection, the second end of the 5th diode D9 respectively with the first end of third storage capacitor EC3, the 6th diode D10 first
The connection of the control terminal of end and the 5th triode Q6；The second end of 6th diode D10 and the control terminal of the 6th triode Q7 connect
It connects；The first end of 6th triode Q7 is connect with the second end of the coil of third relay K3, the second end of the 6th triode Q7
It is connect with the first end of the 5th triode Q6；The second end of 5th triode Q6 and the second end of third storage capacitor EC3 with
Ground wire GND connection.
As shown in figure 8, motor-drive circuit further include: be connected in series in the current limliting electricity of the control terminal of the 5th triode Q6
Resistance, current-limiting resistance herein are expressed as the 5th current-limiting resistance R12；It is connected in series in the current limliting electricity of the control terminal of the 6th triode Q7
Resistance, current-limiting resistance herein are expressed as the 6th current-limiting resistance R13.
As shown in figure 8, motor-drive circuit further include: be connected to the control terminal and the 5th triode Q6 of the 5th triode Q6
Second end between anti-error conducting resistance, anti-error conducting resistance herein is expressed as the anti-error conducting resistance R14 of third.
As shown in figure 8, motor-drive circuit further include: the discharge resistance being connected in parallel with third storage capacitor EC3, herein
Discharge resistance be expressed as third discharge resistance R15.
As shown in figure 8, motor-drive circuit further include: be connected in series in third motor positive and inverse control signal S5 and the
Third between five diode D9 protects capacitor C4；The second end of third protection diode D11 and the first of the 5th diode D9
End connection, the first end of third protection diode D11 are connect with ground wire GND.
Above-mentioned motor-drive circuit can realize the control that motor rotates and reverse by a dpdt relay, two
A triode can equally increase the reliability and safety of circuit, and component needed for circuit is less, save installation space, reduce
Production cost.
In alternative embodiment, two even more strings can also be used in the first switch 3 in above embodiment
The triode of connection, in this way setting further improve the reliability of first switch, so that the safety of entire motor-drive circuit
And reliability is higher.Physical circuit can refer to the triode in Fig. 3-Fig. 8 and mode be connected in series, and details are not described herein.
The present embodiment also provides a kind of electrical equipment, including the motor-drive circuit as described in any in above-described embodiment.
In an alternative embodiment, electrical equipment includes the direct current generator (for example, push-rod electric machine) with positive and negative rotating function, which sets
Standby concretely range hood, the positive and negative rotation of push-rod electric machine in range hood is realized by above-mentioned motor-drive circuit.Certainly, exist
In other embodiments, electrical equipment can also be in the prior art with direct current generator and direct current generator needs other electricity of positive and negative rotation
Device, as needed rationally setting.
Above-mentioned electrical equipment due to using the motor-drive circuit in the present embodiment, therefore also have control circuit simple and
The advantages of high reliablity.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (13)
1. a kind of motor-drive circuit characterized by comprising motor (M), switching module (2) and first switch (3)；Its
In,
The first end of the motor (M) is electric with one end of the first switch (3) and first respectively by the switching module (2)
Source connection, the second end of the motor (M) pass through the switching module (2) described one end with the first switch (3) respectively
It is connected with first power supply；
The switching module (2) is cut for what is rotated and reverse according to the motor positive and inverse control signal control motor (M)
It changes；
The first switch (3) rotates forward the on-off in circuit or reversion circuit for controlling motor (M).
2. motor-drive circuit according to claim 1, which is characterized in that the switching module (2) includes the first relay
Device (K1), the first driving unit (21), the second relay (K2) and the second driving unit (22)；Wherein,
The first end of the coil of first relay (K1) is connect with second source, the coil of first relay (K1)
Second end is connect with the first driving unit (21), the moving contact of first relay (K1) and the first end of the motor (M)
Connection, the normally open contact of first relay (K1) connect with first power supply, first relay (K1) it is normally closed
Contact is connect with the first switch (3)；
The first end of the coil of second relay (K2) is connect with third power supply, the coil of second relay (K2)
Second end is connect with the second driving unit (22), the moving contact of second relay (K2) and the second end of the motor (M)
Connection, the normally open contact of second relay (K2) connect with first power supply, second relay (K2) it is normally closed
Contact is connect with the first switch (3).
3. motor-drive circuit according to claim 1, which is characterized in that the switching module (2) includes third relay
Device (K3) and third driving unit, wherein
The first end of the coil of the third relay (K3) is connect with the 4th power supply, the coil of the third relay (K3)
Second end is connect with third driving unit；
First moving contact of the third relay (K3) is connect with the first end of the motor (M), the third relay
(K3) the second moving contact is connect with the second end of the motor (M)；
The first normally open contact and the second normally closed interlock of the third relay (K3) and the 4th power supply or described first
(3) connection is switched, the first normally closed interlock and the second normally open contact are connect with the first switch (3) or the 4th power supply.
4. according to motor-drive circuit described in claim 2 or 3, which is characterized in that
First driving unit (21) includes the first triode (Q5), the second triode (Q4), first diode (D1), the two or two pole
Manage (D2) and the first storage capacitor (EC1)；Wherein, the first end of the first diode (D1) and first motor positive and negative rotation control
Signal (S2) connection, the second end of the first diode (D1) respectively with the first end of the first storage capacitor (EC1), described the
The first end of two diodes (D2) and the connection of the control terminal of first triode (Q5)；The of second diode (D2)
Two ends are connect with the control terminal of second triode (Q4)；The first end and the first relay of second triode (Q4)
(K1) second end of coil connects, the first end of the second end of second triode (Q4) and first triode (Q5)
Connection；The second end of first triode (Q5) and the second end of first storage capacitor (EC1) are connect with ground wire；
And/or
Second driving unit (22) includes third transistor (Q3), the 4th triode (Q1), third diode (D6), the four or two pole
Manage (D7) and the second storage capacitor (EC2)；Wherein, the first end of the third diode (D6) and the second motor positive and inverse control
Signal (S3) connection, the second end of the third diode (D6) respectively with the first end of the second storage capacitor (EC2), described the
The control terminal connection of the first end and the third transistor (Q3) of four diodes (D7)；The of 4th diode (D7)
Two ends are connect with the control terminal of the 4th triode (Q1)；The first end and the second relay of 4th triode (Q1)
(K2) second end of coil connects, the second end of the 4th triode (Q1) and the first end of the third transistor (Q3)
Connection；The second end of the third transistor (Q3) and the second end of second storage capacitor (EC2) are connect with ground wire；
And/or
Third driving unit includes the 5th triode (Q6), the 6th triode (Q7), the 5th diode (D9), the 6th diode
(D10) and third storage capacitor (EC3)；Wherein, the first end of the 5th diode (D9) and third motor positive and inverse control
Signal (S5) connection, the second end of the 5th diode (D9) respectively with the first end of third storage capacitor (EC3), described the
The first end of six diodes (D10) and the connection of the control terminal of the 5th triode (Q6)；6th diode (D10)
Second end is connect with the control terminal of the 6th triode (Q7)；The first end and third relay of 6th triode (Q7)
(K3) second end of coil connects, the second end of the 6th triode (Q7) and the first end of the 5th triode (Q6)
Connection；The second end of 5th triode (Q6) and the second end of the third storage capacitor (EC3) are connect with ground wire.
5. motor-drive circuit according to claim 4, which is characterized in that further include: current-limiting resistance；
The current-limiting resistance is connected in series in the control terminal of first triode (Q5) and/or the control of the second triode (Q4)
End；
And/or
The current-limiting resistance is connected in series in the control terminal of the third transistor (Q3) and/or the control of the 4th triode (Q1)
End；
And/or
The current-limiting resistance is connected in series in the control terminal of the 5th triode (Q6) and/or the control of the 6th triode (Q7)
End.
6. motor-drive circuit according to claim 4, which is characterized in that further include: anti-error conducting resistance；
The anti-error conducting resistance be connected to first triode (Q5) control terminal and first triode (Q5)
Between two ends；
And/or
The anti-error conducting resistance be connected to the third transistor (Q3) control terminal and the third transistor (Q3)
Between two ends；
And/or
The anti-error conducting resistance be connected to the 5th triode (Q6) control terminal and the 5th triode (Q6)
Between two ends.
7. motor-drive circuit according to claim 4, which is characterized in that further include: discharge resistance；
The discharge resistance is connected in parallel with first storage capacitor (EC1)；
And/or
The discharge resistance is connected in parallel with second storage capacitor (EC2)；
And/or
The discharge resistance is connected in parallel with the third storage capacitor (EC3).
8. motor-drive circuit according to claim 4, which is characterized in that further include protection capacitor and protection diode；
The protection capacitor is connected in series between first motor positive and negative rotation control signal (S2) and first diode (D1), described
The second end of protection diode is connect with the first end of first diode (D1), and the first end and ground wire of the protection diode connect
It connects；
And/or
The protection capacitor is connected in series between the second motor positive and inverse control signal (S3) and third diode (D6), described
The second end of protection diode is connect with the first end of third diode (D6), and the first end and ground wire of the protection diode connect
It connects；
And/or
The protection capacitor is connected in series between third motor positive and inverse control signal (S5) and the 5th diode (D9), described
The second end of protection diode is connect with the first end of the 5th diode (D9), and the first end and ground wire of the protection diode connect
It connects.
9. motor-drive circuit according to claim 1, which is characterized in that further include: motor filter circuit, with the electricity
Machine (M) is connected in parallel.
10. any motor-drive circuit in -9 according to claim 1, which is characterized in that further include:
Detection unit (4) is connect, for detecting the electric current of the motor (M) with the first switch (3).
11. motor-drive circuit according to claim 10, which is characterized in that the first switch (3) includes switch three
The first end of pole pipe (Q2), the switching transistor (Q2) is connect with switching module, the second end of the switching transistor (Q2)
It is connect with detection unit, the control terminal of the switching transistor (Q2) is connect with switching signal, and the switching signal includes PWM letter
Number.
12. a kind of electrical equipment, which is characterized in that including the motor-drive circuit as described in any in claim 1-11.
13. electrical equipment according to claim 12, which is characterized in that the electrical equipment includes range hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165785.2A CN109120193A (en) | 2018-09-30 | 2018-09-30 | Motor-drive circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165785.2A CN109120193A (en) | 2018-09-30 | 2018-09-30 | Motor-drive circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109120193A true CN109120193A (en) | 2019-01-01 |
Family
ID=64857248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811165785.2A Pending CN109120193A (en) | 2018-09-30 | 2018-09-30 | Motor-drive circuit and electrical equipment |
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| Country | Link |
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| CN (1) | CN109120193A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318627A (en) * | 2019-06-25 | 2019-10-11 | 宁波方太厨具有限公司 | Bi-directional drive control circuit |
| CN110984766A (en) * | 2019-12-11 | 2020-04-10 | 深圳南方德尔汽车电子有限公司 | Relay control circuit of electric vehicle window and control method thereof |
| CN112053642A (en) * | 2020-07-29 | 2020-12-08 | 深圳供电局有限公司 | Safe marking device and secondary screen cabinet of transformer substation |
| CN112865610A (en) * | 2021-01-08 | 2021-05-28 | 上海欧菲智能车联科技有限公司 | Motor drive circuit |
| CN113834252A (en) * | 2021-09-06 | 2021-12-24 | 澳柯玛股份有限公司 | Automatic door opening and closing control method for low-temperature refrigerator |
| CN114050747A (en) * | 2021-11-03 | 2022-02-15 | 深圳朗特智能控制股份有限公司 | Motor forward and reverse rotation driving circuit and motor forward and reverse rotation driving terminal equipment |
-
2018
- 2018-09-30 CN CN201811165785.2A patent/CN109120193A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318627A (en) * | 2019-06-25 | 2019-10-11 | 宁波方太厨具有限公司 | Bi-directional drive control circuit |
| CN110984766A (en) * | 2019-12-11 | 2020-04-10 | 深圳南方德尔汽车电子有限公司 | Relay control circuit of electric vehicle window and control method thereof |
| CN112053642A (en) * | 2020-07-29 | 2020-12-08 | 深圳供电局有限公司 | Safe marking device and secondary screen cabinet of transformer substation |
| CN112865610A (en) * | 2021-01-08 | 2021-05-28 | 上海欧菲智能车联科技有限公司 | Motor drive circuit |
| CN113834252A (en) * | 2021-09-06 | 2021-12-24 | 澳柯玛股份有限公司 | Automatic door opening and closing control method for low-temperature refrigerator |
| CN114050747A (en) * | 2021-11-03 | 2022-02-15 | 深圳朗特智能控制股份有限公司 | Motor forward and reverse rotation driving circuit and motor forward and reverse rotation driving terminal equipment |
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