CN206932190U - A kind of circuit for controlling motor - Google Patents
A kind of circuit for controlling motor Download PDFInfo
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- CN206932190U CN206932190U CN201720679323.7U CN201720679323U CN206932190U CN 206932190 U CN206932190 U CN 206932190U CN 201720679323 U CN201720679323 U CN 201720679323U CN 206932190 U CN206932190 U CN 206932190U
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Abstract
The application provides a kind of circuit for controlling motor, including：The voltage conversion circuit that input is connected with power input；The microprocessor being connected with the output end of voltage conversion circuit；The motor-drive circuit that control terminal is connected with the output end of microprocessor, the input of motor-drive circuit are connected with power input, and output end is connected with motor, and full-bridge circuit is configured with motor-drive circuit；Be arranged between motor-drive circuit and voltage conversion circuit input it is counter drag electromotive force to guide circuit, for the anti-input for dragging electromotive force to voltage conversion circuit for guiding motor-drive circuit to export；Sample circuit, for dragging electromotive force to sample to counter caused by motor, sampled signal is sent to microprocessor；Microprocessor is used for：When the sampled signal of sample circuit output is more than setting value, the control signal for controlled motor braking is exported.So as to prevent it is counter drag electromotive force to caused by circuit devcie damage.
Description
Technical field
It the utility model is related to circuit for controlling motor technical field, and in particular to one kind has that motor is counter drags electromotive force to suppress
The circuit for controlling motor of function.
Background technology
Modern society, automobile is as a kind of vehicles, its safety, energy-conservation and be comfortably its essential key element and bar
Part, but with the increase of automobile quantity and the popularization of car owning amount, automobile is increasingly becoming a kind of culture performance, one kind life
Mode, the automation of automobile and intelligence degree also more and more higher.
The car door of more and more automobiles realizes Electronic control, such as automobile engine lid, and side door, sliding door is with after
Standby chamber door, but for the consideration of safety and hommization angle, control manually must be retained.Therefore car door is in Electronic control
When, its internal motor converts electrical energy into mechanical energy to drive the on and off of car door, but in manual mode, and this motor is just
Electromotive force is exported equivalent to generator and externally, it is referred to herein as counter to drag electromotive force.It is faster to pull the speed of car door, it is caused anti-
Drag electromotive force bigger, and it is counter drag electromotive force can to inside metal-oxide-semiconductor type motor-drive circuit have an impact, when speed exceedes
During certain value, caused counter drag or even can damage drive circuit and control circuit at electromotive force.
How to prevent under user's manual mode, metal-oxide-semiconductor type motor-drive circuit is damaged when pulling car door turns into this area skill
One of art personnel technical problem urgently to be resolved hurrily.
Utility model content
In view of this, the utility model embodiment provides a kind of circuit for controlling motor, when pulling car door to user to realize
It is caused it is counter drag electromotive force to be suppressed, prevent from counter dragging electromotive force excessive and damaging circuit for controlling motor.
To achieve the above object, the utility model embodiment provides following technical scheme：
A kind of circuit for controlling motor, including：
The voltage conversion circuit that input is connected with power input；
The microprocessor being connected with the output end of the voltage conversion circuit；
The motor-drive circuit that control terminal is connected with the output end of the microprocessor, the input of the motor-drive circuit
End is connected with the power input, and output end is connected with motor, and full-bridge circuit is configured with the motor-drive circuit；
Be arranged between motor-drive circuit and voltage conversion circuit input it is counter drag electromotive force to guide circuit, for drawing
Lead the anti-input for dragging electromotive force to the voltage conversion circuit of the motor-drive circuit output；
Sample circuit, the output end of the sample circuit are connected with the microprocessor, for caused by the motor
It is counter to drag electromotive force to be sampled, sampled signal is sent to the microprocessor；
The microprocessor is used for：When the sampled signal of sample circuit output is more than setting value, export for controlling
The control signal of motor braking processed.
Preferably, in above-mentioned circuit for controlling motor, it is described it is counter drag electromotive force guiding circuit be made up of a diode：
The input of the diode is connected with the output end of rectification circuit, the output end of the diode and the voltage
The input of change-over circuit is connected, the rectification circuit by switching tube in full-bridge circuit in the motor-drive circuit parasitism two
Pole pipe is formed.
Preferably, in above-mentioned circuit for controlling motor, the sample circuit is made up of Hall sensor；
The Hall sensor is used to sensing the changes of magnetic field of the motor, the power end of the Hall sensor with it is described
The output end of voltage conversion circuit is connected.
Preferably, in above-mentioned circuit for controlling motor, the sample circuit is voltage sampling circuit；
The voltage sampling circuit includes first resistor and second resistance；
The first end of the first resistor is connected with the anti-input for dragging electromotive force guiding circuit；
The first end of the second resistance is connected with the second end of the first resistor, the second termination of the second resistance
Ground；
The common port of the first resistor and second resistance is connected with the microprocessor.
Preferably, in above-mentioned circuit for controlling motor, comparison circuit is configured with the microprocessor；
The first input end of the comparison circuit is used to obtain the sampled signal collected by the sample circuit；
Second end of the comparison circuit is used to obtain reference signal；
When the sampled signal is more than the reference signal, the comparison circuit exports predetermined level signal；
The microprocessor is specifically configured to：When detecting the predetermined level signal, electricity is driven to the motor
Road exports the control signal for controlled motor braking.
Preferably, in above-mentioned circuit for controlling motor, the motor-drive circuit includes：
It is pre- to drive chip and full-bridge circuit；
When the full-bridge circuit and it is pre- drive chip individual packages when, the brake signal output end of the microprocessor with it is described
The control terminal of the preset switches pipe of full-bridge circuit is connected, when the preset switches pipe turns on, the motor braking；
The microprocessor of stating is specifically configured to：When the sampled signal is more than setting value, believed by the braking
Number export the control signal for controlling the preset switches pipe conducting.
Preferably, in above-mentioned circuit for controlling motor, when the pre- drive chip and full-bridge circuit are mutually encapsulated into same chip
When interior, the motor-drive circuit is designated as full-bridge driving chip；
The brake signal output end of the microprocessor is connected with the control signal input of the full-bridge driving chip；
The microprocessor of stating is used for：When the sampled signal is more than setting value, by the brake signal to described
Full-bridge driving chip exports the control signal for controlling the preset switches pipe conducting.
Preferably, in above-mentioned circuit for controlling motor, the setting value is configured as：
It is corresponding with the setting value counter to drag electromotive force to be more than 24V and be less than 27V.
Preferably, in above-mentioned circuit for controlling motor, can also include：It is arranged on power input and motor driving electricity
Reverse-connection preventing circuit between road.
Based on above-mentioned technical proposal, the circuit for controlling motor that the utility model embodiment provides when in use, works as hand buggy
Men Shi, motor produce it is counter drag electromotive force, outside output current, output current drags electromotive force to draw after full-bridge circuit rectification by counter
Conductive path is guided to the input of the voltage conversion circuit, after the voltage conversion circuit is changed to the electric signal, to
The microprocessor provides operating voltage, the microprocessor work, and the sample circuit drags electromotive force to counter caused by motor
Sampled, sampled signal is sent to the microprocessor, after the microprocessor gets the sampled signal, by interior
The default comparison circuit in portion or comparison program, the sampled signal is contrasted with setting value, when the sampled signal is more than
During the setting value, the control signal for controlled motor braking is exported, stops that output is described counter to drag electricity after the motor braking
Kinetic potential, electromotive force is dragged to continue to increase so as to suppress counter, to prevent its damage to circuit for controlling motor internal circuit.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is a kind of structural representation of circuit for controlling motor disclosed in the embodiment of the present application；
Fig. 2 is a kind of structural representation of circuit for controlling motor disclosed in another embodiment of the application；
Fig. 3 is a kind of structural representation of circuit for controlling motor disclosed in the application another embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Existing method is mainly by strengthening the performance of driving chip or adding TVS (Transient in motor output end
Voltage Suppressor, transient voltage suppressor), to suppress this anti-influence for dragging electromotive force to bring circuit,
But this method often increases the cost of motor-drive circuit and control circuit；Other different automobile types, different car door motors and
Difference pull it is counter caused by speed drag electromotive force to have very big difference, therefore the performance of raising driving chip simply and matching
Corresponding TVS is unpractical.
This is directed to, there is the anti-circuit for controlling motor for dragging electromotive force to suppress function of motor this application discloses a kind of, with
Solve the problems, such as to pull caused by car door it is counter drag electromotive force by Car's door controlling device damage.
Referring to Fig. 1, Fig. 1 is a kind of principle schematic of circuit for controlling motor, motor control disclosed in the embodiment of the present application
Circuit can include：Voltage conversion circuit 100, microprocessor 200, motor-drive circuit 300, it is counter drag electromotive force guide circuit
400 and sample circuit 500；
Voltage conversion circuit 100 is configured as：Input is connected with power input, and input electricity is gathered from power input
Signal, input electrical signal is changed, the voltage letter being converted into required for microprocessor and/or other logic circuits
Number, the design method of voltage conversion circuit 100 is more ripe in the prior art, such as voltage conversion circuit 100 can be borrowed
Reflect DC-DC change-over circuits of the prior art, and the performance requirement that its design form can be different according to user sets different match somebody with somebody
Mode is put, as long as the circuit of voltage conversion can be realized in the prior art, can be turned as the voltage in the embodiment of the present application
Change circuit 100；Power input can be connected with on-vehicle battery；
Microprocessor 200 is connected with the output end of voltage conversion circuit 100, and it is configured as：It is loaded with it default
Processing routine, the digital and analog signaling got is handled, communicated with external interface and sent out to late-class circuit to realize
Go out control command, and by the comparison circuit or program of internal preset by the sampled signal collected by sample circuit 500 with setting
Determine signal to be compared, when the value of the sampled signal collected by sample circuit 500 is more than setting value, generate for controlling
The control signal of motor braking；Its mode specifically braked to motor can voluntarily select according to user's request, for example,
In technical scheme disclosed in the embodiment of the present application, microprocessor 200 can be braked by motor-drive circuit 300 to motor,
Specially：When the value of the sampled signal collected by sample circuit 500 is more than setting value, microprocessor 200 is exported for controlling
The control signal of preset switches pipe conducting in motor-drive circuit 300 processed, is turned on so that motor two by default switching tube
End ground connection, so as to be braked to motor.
The control terminal of motor-drive circuit 300 is connected with microprocessor 200, input and the electricity of motor-drive circuit 300
Source input is connected, and output end is connected with motor M, and full-bridge circuit is configured with motor-drive circuit 300, and it is used for according to micro- place
The control instruction of device 200 is managed by the rotary state of full-bridge circuit motor, and by full-bridge circuit to flowing through the electricity of motor
The direction of stream is controlled, and so as to realize the control to the rotation direction of motor, such as controlled motor forward or reverse, motor is again
Convert electrical energy into the on and off of mechanical energy driving car door；
It is counter drag electromotive force guiding circuit 400 be arranged on the input of voltage conversion circuit 100 and motor-drive circuit 300 it
Between, for guiding the anti-input for dragging electromotive force electric current to voltage conversion circuit 100 caused by motor, carried for microprocessor 200
For operating current, when user pulls car door, the work under the anti-electric current for dragging electromotive force to generate caused by motor of microprocessor 200
Make；
Sample circuit 500 is used to drag electromotive force to sample to counter caused by motor, and sampled signal is sent to microprocessor
Device 200；
Technical scheme disclosed in above-described embodiment at work, power input VBAT connection on-vehicle batteries, microprocessor
After 200 send control command, the full-bridge circuit work in motor-drive circuit 300；Pass through each switching tube in full-bridge circuit
Conducting state, motor forward or reverse；When pulling car door, user pulls car door, motor by it is counter drag produce it is counter drag it is electronic
Gesture, now equivalent to one alternating current generator of motor outwards export AC electromotive force, and in each switching tube in full-bridge circuit
The parasitic diode in portion now just constitutes the rectification circuit of a full-bridge, the AC electrical that rectification circuit can export to motor
Gesture carries out rectification, and forms the direct current of a pulsation at full-bridge circuit both ends；The speed that user pulls car door is faster, caused
The magnitude of voltage of direct current is bigger, and the application drags electromotive force to guide circuit 400 to guide direct current to voltage conversion electricity by counter
The input on road 100, after voltage conversion circuit 100 is changed to the electric signal, operating voltage is provided to microprocessor 200,
Microprocessor 200 works, and sample circuit 500 drags electromotive force to sample to counter caused by motor, and sampled signal is sent to micro-
Processor 200, after microprocessor 200 gets sampled signal, by the comparison circuit or comparison program of internal preset, it will adopt
Sample signal is contrasted with setting value, when sampled signal is more than setting value, exports the control signal for controlled motor braking,
Stop that output is counter to drag electromotive force after motor braking, drag electromotive force to continue to increase so as to suppress counter, to prevent it to motor control
The damage of circuit internal circuit.
In such scheme, suppress it is counter drag electromotive force when, microprocessor 200 is in anti-work under dragging electric current caused by electromotive force
Make, it is therefore not necessary to powered using power input, therefore the utility model not only can drag electromotive force in normal work to counter
Suppressed, can also on auto production line, automobile be also fitted without battery when, drag caused electromotive force using motor is counter
To drag electromotive force to suppress to counter.
The inside of microprocessor 200 has the either default journey of the circuit of the control signal for output control motor braking
Sequence, by taking circuit as an example, the circuit can be a comparison circuit, and the first input end of comparison circuit is used to obtain by sample circuit
500 sampled signals collected；Second input of comparison circuit is used to obtain reference signal, and the size of reference signal is setting
Value；When sampled signal is more than reference signal, comparison circuit output predetermined level signal；Predetermined level signal can be directly as
Used for the control signal of controlled motor braking, the control signal is alternatively referred to as brake signal, for example, it can directly make
For the preset switches pipe of the full-bridge circuit in the control signal input or motor-drive circuit of motor-drive circuit, when
So, an other brake signal can also be generated to be braked to motor according to the level signal by microprocessor 200, microprocessor
Device sends the brake signal control terminal to the control signal input of motor-drive circuit or preset switches pipe, to control electricity
Default switching tube conducting in the full-bridge circuit of drive circuit.
Referring to Fig. 2, in technical scheme disclosed in the embodiment of the present application, the anti-specific knot for dragging electromotive force guiding circuit 400
Configuration formula can be according to user's request sets itself, as long as it can drag electromotive force to guide to voltage conversion by counter caused by motor
Circuit 100, for example, in technical scheme disclosed in the embodiment of the present application, it only can be made up of a diode D2, two poles
Pipe D2 input is connected with the output end of rectification circuit, the output end of diode and the input phase of voltage conversion circuit 100
Even, rectification circuit is the rectification circuit being made up of the parasitic diode of each switching tube in the full-bridge circuit of motor-drive circuit.
Referring to Fig. 2, in technical scheme disclosed in the embodiment of the present application, the specific constructive form of sample circuit 500 can be with
According to user's request sets itself, as long as it can drag electromotive force to sample to counter caused by motor, for example, in this Shen
Please be in technical scheme disclosed in embodiment, sample circuit can be Hall sensor, the magnetic of the direct induction machine of Hall sensor
Field change, the cycle of the changes of magnetic field can characterize the rotating speed of motor, produce the induced-current corresponding with the magnetic field changed, will
Induced-current is sent to microprocessor 200, and Hall sensor is arranged near the bearing of motor, and when motor rotates, Hall passes
Sensor outwards exports pulse, and motor speed is faster, exports that the frequency of pulse is faster, and output current is also bigger, and microprocessor can
Braked with the size of the current value exported by Hall sensor to determine a need for controlled motor, certainly, microprocessor 200
It can also judge whether to need to brake motor by judging the rotating speed of motor, sentence when by judging the rotating speed of motor
Whether disconnected when needing to brake motor, microprocessor internal is provided with counter and timer, passes through counter and timing
Device calculates the change frequency of Hall sensor induced signal, and the change frequency according to induced signal calculates the rotating speed of motor, will
The rotating speed of motor judges whether to need controlled motor to brake compared with setting value according to comparative result, it should be pointed out that
According to the difference of comparison other, setting value can set different forms, for example, it can be a numerical value, current value or voltage
Value etc..
Referring to Fig. 3, sample circuit 500 can also be voltage sampling circuit, and now setting value is a magnitude of voltage, voltage sample
Circuit can be made up of first resistor R1 and second resistance R2, and first resistor R1 first end drags electromotive force to guide circuit with counter
400 input is connected；
Second resistance R2 first end is connected with first resistor R1 the second end, second resistance R2 the second end ground connection；
First resistor R1 and second resistance R2 common port are connected with microprocessor 200.
Voltage sampling circuit drags electric signal caused by electromotive force to carry out voltage sample to counter, and microprocessor 200 passes through detection
The magnitude of voltage at second resistance R2 both ends, by the magnitude of voltage at second resistance R2 both ends compared with setting value, according to comparative result
Judge whether to need to generate the control signal for being used for braking motor.
In technical scheme disclosed in the embodiment of the present application, the structure and composition of motor-drive circuit 300 can be according to use
Family demand sets itself, for example, motor-drive circuit 300 can include：
It is pre- to drive chip and full-bridge circuit；
The pre- chip that drives is at least configured to：Control command according to microprocessor 200 drives the working condition of full-bridge circuit,
Motor M rotation direction is controlled by the working condition of full-bridge circuit, certainly, motor-drive circuit 300 also by with
Motor both ends are connected to detect motor M driving current, and driving current is fed back into microprocessor 200.
The pre- control signal input for driving chip can include：Enable pin IN1, the enable pin of right half-bridge of left half-bridge
IN2, the PWM input pins PWM1 of left half-bridge and right half-bridge PWM input pin PWM2, the certainly pre- control signal for driving chip
Input can also include current feedback signal CS ends, and the pre- control output end for driving chip includes：Opened with each in full-bridge circuit
The output end that the control terminal of pipe is connected one by one is closed, and for detecting the current acquisition end of motor drive current；
Full-bridge circuit includes：Control terminal is opened with driving first switch pipe Q1, second switch pipe Q2, the 3rd that chip is connected in advance
Pipe Q3 and the 4th switching tube Q4 is closed, switching tube Q1, Q2, Q3 and Q4 are preferably NMOS pipes；
First switch pipe Q1 and second switch pipe Q2 drain electrode are connected with power input；
3rd switching tube Q3 drain electrode is connected with first switch pipe Q1 source electrode, motor M first end, the 3rd switching tube Q3
Source ground；
4th switching tube Q4 drain electrode is connected with second switch pipe Q2 source electrode, motor M the second end, the 4th switching tube Q4
Source ground；
Wherein, the 3rd switching tube Q3 and the 4th switching tube Q4 is as preset switches pipe disclosed in the above embodiments of the present application,
That is, when microprocessor is braked by motor-drive circuit controlled motor, the control signal controlled motor of microprocessor output is driven
The 3rd switching tube Q3 and the 4th switching tube Q4 conductings in dynamic circuit, with braking motor；
Specifically, when the output signal by microprocessor 200 controls default switching tube to turn on, can be according to motor
The specific constructive form of drive circuit sets the connected mode between microprocessor 200 and motor-drive circuit 400, for example, such as
When full-bridge circuit in fruit motor-drive circuit individually encapsulates or be unencapsulated, directly the brake signal of microprocessor can be exported
End is connected with the control terminal of default switching tube in full-bridge circuit, when the sampled signal of sample circuit output is more than setting value,
The output control signal of microprocessor directly acts on the control terminal of default switching tube, and default switching tube can be switching tube
Q3 and Q4, default switching tube is controlled to turn on, to cause motor both ends to be grounded by default switching tube, so as to realize to electricity
Machine is braked.
When sample circuit is Hall sensor, now circuit for controlling motor includes：Voltage conversion circuit 100, microprocessor
Device 200, chip, the full-bridge circuit being made up of 4 MOS type switching tubes, sample circuit, motor M and some resistors are driven in advance；Wherein
Power input VBAT is used to power to circuit for controlling motor internal module and motor, and it is connected by wire with on-vehicle battery, and
It is divided into two-way after circuit for controlling motor is entered：Enter voltage conversion circuit 100 all the way, another way is connected to motor driving electricity
The input on road；It by the Power convert of input is microprocessor 200 and other logic circuits that the function of voltage conversion circuit 100, which is,
5V the or 3.3V direct currents needed；Digital and analog signaling that microprocessor 200 is responsible in process plate, communicate with external interface and
Control command is sent, the pre- control signal input for driving chip includes enable pin IN1, the enable pin of right half-bridge of left half-bridge
IN2, the PWM input pins PWM1 of left half-bridge, the PWM input pins PWM2 and current feedback signal CS of right half-bridge；It is pre- to drive chip
It is responsible for receiving the control command of microprocessor and full-bridge circuit that driving is made up of 4 metal-oxide-semiconductor Q1~Q4, and to microprocessor
The driving current of 200 feedback full-bridge circuit outputs；Wherein, metal-oxide-semiconductor Q1 and Q3 composition full-bridge circuit left half-bridge, metal-oxide-semiconductor Q2 and
Q4 forms the right half-bridge of full-bridge circuit.
In normal work, power input VBAT connection on-vehicle batteries, after microprocessor sends control command, core is driven in advance
Piece driving full-bridge circuit work；When Q1 and Q4 switching tubes are opened simultaneously, the pre- chip that drives is rotated forward by full-bridge circuit motor,
When Q2 and Q3 switching tubes are opened simultaneously, the pre- chip that drives is inverted by full-bridge circuit motor；In normal work, due to car
The voltage for carrying battery is less than setting value, thus will not switch tube Q3 and Q4 control have an impact；When pulling car door, motor quilt
Counter to drag, now equivalent to one alternating current generator of motor outwards exports AC electromotive force, and metal-oxide-semiconductor Q1 in full-bridge circuit,
Q2, Q3, Q4 endoparasitic diode now just constitute the rectification circuit of a full-bridge, and rectification circuit can export to motor
AC electromotive force carry out rectification, and between the earth terminal of power input and each circuit module formed one pulsation it is straight
Stream electricity, electromotive force is dragged to guide circuit that the direct current is introduced into voltage conversion circuit 100 by counter, voltage conversion circuit 100 is to this
Direct current changes backward microprocessor 200 and provides operating current；Sample circuit drags electromotive force to adopt to counter caused by motor
Sample, sampled signal is sent to microprocessor 200, microprocessor 200 passes through the signal intensity of induced signal or induced signal
Change frequency judges whether to need controlled motor to brake, i.e., when sampled signal is more than setting value, output control signal, to cause
The 3rd switching tube Q3 and the 4th switching tube Q4 is controlled to turn on, when switching tube pipe Q3 and Q4 is opened simultaneously, motor both ends will be short
It is connected together, so as to play a part of that motor is braked；No longer outwards output electric energy, sample circuit export after motor braking
Sampled signal be 0, now no current acts on switching tube pipe Q3 and Q4 control terminal, switching tube Q3 and Q4 shut-off, now car
Door can be pulled again, and motor and sample circuit export again and outwards electric signal until next braking action occurs；Pass through
Said process, pull on it is counter caused by car door drag electromotive force to be limited in the scope of a safety, while be unlikely to lose again
The function of hand switch car door.
When motor-drive circuit is uniformly packaged together, the full-bridge circuit collection that chip and four MOS are formed will be driven in advance
Into together, now the motor-drive circuit can be designated as full-bridge driving chip, due to the control that can not export microprocessor
Signal processed directly acts on the low side metal-oxide-semiconductor of left and right half-bridge, and low side MOS pipes are the 3rd switching tube Q3 and the 4th switching tube Q4, because
This can guide to control signal in the control signal input of full-bridge driving chip or so half-bridge, the control letter of full-bridge driving chip
Number input includes：Enable Pin EN1 and EN2, left half-bridge control Enable Pin INa, right half-bridge Enable Pin INb and PWM control are dragged in counnter attack
Signal input part PWM processed, full-bridge driving chip can also include being used for the feedback letter for feeding back motor drive current to microprocessor
Number end CS.
Now, in above-mentioned circuit for controlling motor normal work, power input VBAT connection on-vehicle batteries, microprocessor
After device sends control command, full-bridge driving chip motor rotating；Because the voltage of on-vehicle battery is less than setting value, therefore
Will not have an impact to the control of full-bridge driving chip；When pulling car door, the full-bridge circuit inside full-bridge driving chip reforms into
Full bridge rectifier, rectification is carried out to the AC electromotive force of motor output, work is provided for microprocessor by voltage conversion circuit
Make electric current, it is counter caused by sample circuit induction machine to drag electromotive force, and sampled signal is sent to microprocessor；Equally work as motor
When output voltage is more than setting value, control signal input output triggering letter is dragged in counnter attack of the microprocessor to full-bridge driving chip
Number, full-bridge driving chip controls the low-end switch pipe conducting in full-bridge circuit according to the trigger signal, with braking motor, so as to press down
Motor output electromotive force processed continues to increase.
During in order to prevent reverse power connection, circuit for controlling motor is damaged, can also be set in the above-mentioned circuit for controlling motor of the application
Reverse-connection preventing circuit 600 is equipped with, reverse-connection preventing circuit 600 is arranged between motor-drive circuit and power input.It can be by one
Metal-oxide-semiconductor forms, and the grid of metal-oxide-semiconductor is connected with the pre- chip that drives, and is flowed to by its internal parasitic diode control electric current, certainly
Directly it can be made up of a diode.Certainly, it is alternatively other circuit forms, as long as anti-reverse circuit knot can be played
Structure, can reverse-connection preventing circuit be used as to use.
Preferably, in technical scheme disclosed in the embodiment of the present application, metal-oxide-semiconductor can be N-type MOS pipes or p-type metal-oxide-semiconductor
Deng.
In design, user can set the size of setting value according to self-demand, if counter corresponding to setting value drag electricity
When EMF voltage is too small, when can cause to pull car door, it is easy to on-position is entered, during so as to influence hand switch car door
Feel；And setting value design it is excessive when, can not play a part of protect internal circuit；Preferably, the design principle of setting value
For：By setting the setting value of fair-sized, EMF voltage is dragged to be limited in the range of 24V to 27V by counter, now can be neither
Influence feel during hand switch door, moreover it is possible to which internal circuit is played a very good protection.
The utility model proposes circuit for controlling motor on the basis of not increasing or increasing a small amount of hardware cost, using existing
Some sensor and motor-drive circuit, the anti-suppression for dragging electromotive force of motor is realized, greatly reduces controller cost.
The anti-suppression threshold value for dragging electromotive force of the utility model can be configured by the regulation to setting value, from without
Due to different car doors and motor change circuit, make the scope of application of controller wider, greatly strengthen controller in different cars
Reusability in type, reduce the cost that different automobile types need repeatedly to develop.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
- A kind of 1. circuit for controlling motor, it is characterised in that including：The voltage conversion circuit that input is connected with power input；The microprocessor being connected with the output end of the voltage conversion circuit；The motor-drive circuit that control terminal is connected with the output end of the microprocessor, the input of the motor-drive circuit with The power input is connected, and output end is connected with motor, and full-bridge circuit is configured with the motor-drive circuit；Be arranged between motor-drive circuit and voltage conversion circuit input it is counter drag electromotive force to guide circuit, for guiding State the anti-input for dragging electromotive force to the voltage conversion circuit of motor-drive circuit output；Sample circuit, the output end of the sample circuit are connected with the microprocessor, for being dragged to counter caused by the motor Electromotive force is sampled, and sampled signal is sent to the microprocessor；The microprocessor is used for：When the sampled signal of sample circuit output is more than setting value, export for controlling electricity The dynamic control signal of mechanism.
- 2. circuit for controlling motor according to claim 1, it is characterised in that it is described it is counter drag electromotive force guide circuit by one or two Pole pipe is formed：The input of the diode is connected with the output end of rectification circuit, the output end of the diode and the voltage conversion The input of circuit is connected, the rectification circuit by switching tube in full-bridge circuit in the motor-drive circuit parasitic diode Form.
- 3. circuit for controlling motor according to claim 1, it is characterised in that the sample circuit is by Hall sensor structure Into；The Hall sensor is used for the changes of magnetic field of induction machine, the power end of the Hall sensor and the voltage conversion The output end of circuit is connected.
- 4. circuit for controlling motor according to claim 1, it is characterised in that the sample circuit is voltage sampling circuit；The voltage sampling circuit includes first resistor and second resistance；The first end of the first resistor is connected with the anti-input for dragging electromotive force guiding circuit；The first end of the second resistance is connected with the second end of the first resistor, the second end ground connection of the second resistance；The common port of the first resistor and second resistance is connected with the microprocessor.
- 5. circuit for controlling motor according to claim 1, it is characterised in that it is electric to be configured with comparison in the microprocessor Road；The first input end of the comparison circuit is used to obtain the sampled signal collected by the sample circuit；Second end of the comparison circuit is used to obtain reference signal；When the sampled signal is more than the reference signal, the comparison circuit exports predetermined level signal；The microprocessor is specifically configured to：It is defeated to the motor-drive circuit when detecting the predetermined level signal Go out the control signal for controlled motor braking.
- 6. circuit for controlling motor according to claim 1, it is characterised in that the motor-drive circuit includes：It is pre- to drive chip and full-bridge circuit；When the full-bridge circuit and pre- drive chip individual packages, brake signal output end and the full-bridge of the microprocessor The control terminal of the preset switches pipe of circuit is connected, when the preset switches pipe turns on, the motor braking；The microprocessor is specifically configured to：When the sampled signal is more than setting value, exported by the brake signal For controlling the control signal of the preset switches pipe conducting.
- 7. circuit for controlling motor according to claim 6, it is characterised in that when the pre- drive chip and full-bridge circuit are common When being encapsulated in same chip, the motor-drive circuit is designated as full-bridge driving chip；The brake signal output end of the microprocessor is connected with the control signal input of the full-bridge driving chip；The microprocessor is used for：When the sampled signal is more than setting value, driven by the brake signal to the full-bridge Dynamic chip exports the control signal for controlling the preset switches pipe conducting.
- 8. circuit for controlling motor according to claim 1, it is characterised in that corresponding with the setting value counter to drag electromotive force More than 24V and it is less than 27V.
- 9. circuit for controlling motor according to claim 1, it is characterised in that also include：The reverse-connection preventing circuit being arranged between power input and the motor-drive circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720679323.7U CN206932190U (en) | 2017-06-12 | 2017-06-12 | A kind of circuit for controlling motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720679323.7U CN206932190U (en) | 2017-06-12 | 2017-06-12 | A kind of circuit for controlling motor |
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| CN206932190U true CN206932190U (en) | 2018-01-26 |
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| CN201720679323.7U Active CN206932190U (en) | 2017-06-12 | 2017-06-12 | A kind of circuit for controlling motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247613A (en) * | 2018-03-07 | 2019-09-17 | 广东美的生活电器制造有限公司 | Food processor and its anti-motor rotation blockage control method, device |
| CN110792352A (en) * | 2019-11-27 | 2020-02-14 | 芜湖莫森泰克汽车科技股份有限公司 | Automobile side sliding door control method and control circuit |
| CN110863729A (en) * | 2019-11-27 | 2020-03-06 | 芜湖莫森泰克汽车科技股份有限公司 | Automobile window speed regulation circuit and method |
| CN112230668A (en) * | 2020-10-14 | 2021-01-15 | 四川航天烽火伺服控制技术有限公司 | Drive circuit and system |
| CN114337470A (en) * | 2022-01-04 | 2022-04-12 | 大陆汽车研发（重庆）有限公司 | Motor reverse rotation protection device and protection method thereof and motor driving system |
| CN115065140A (en) * | 2022-08-19 | 2022-09-16 | 深圳市宝润科技有限公司 | Motor energy recovery circuit, charge-discharge module and electric equipment |
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2017
- 2017-06-12 CN CN201720679323.7U patent/CN206932190U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247613A (en) * | 2018-03-07 | 2019-09-17 | 广东美的生活电器制造有限公司 | Food processor and its anti-motor rotation blockage control method, device |
| CN110792352A (en) * | 2019-11-27 | 2020-02-14 | 芜湖莫森泰克汽车科技股份有限公司 | Automobile side sliding door control method and control circuit |
| CN110863729A (en) * | 2019-11-27 | 2020-03-06 | 芜湖莫森泰克汽车科技股份有限公司 | Automobile window speed regulation circuit and method |
| CN112230668A (en) * | 2020-10-14 | 2021-01-15 | 四川航天烽火伺服控制技术有限公司 | Drive circuit and system |
| CN114337470A (en) * | 2022-01-04 | 2022-04-12 | 大陆汽车研发（重庆）有限公司 | Motor reverse rotation protection device and protection method thereof and motor driving system |
| CN114337470B (en) * | 2022-01-04 | 2024-01-30 | 大陆汽车研发（重庆）有限公司 | Motor reversal protection device, protection method thereof and motor driving system |
| CN115065140A (en) * | 2022-08-19 | 2022-09-16 | 深圳市宝润科技有限公司 | Motor energy recovery circuit, charge-discharge module and electric equipment |
| CN115065140B (en) * | 2022-08-19 | 2022-11-15 | 深圳市宝润科技有限公司 | Motor energy recovery circuit, charge-discharge module and electric equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co., Ltd Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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| CP03 | "change of name, title or address" |