CN109873403A - Circuit for controlling motor, control method and ring network cabinet - Google Patents
Circuit for controlling motor, control method and ring network cabinet Download PDFInfo
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- CN109873403A CN109873403A CN201910288725.8A CN201910288725A CN109873403A CN 109873403 A CN109873403 A CN 109873403A CN 201910288725 A CN201910288725 A CN 201910288725A CN 109873403 A CN109873403 A CN 109873403A
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Abstract
This application involves a kind of circuit for controlling motor, including motor, comparison circuit, control module and switching circuit.The comparison circuit is connect with the motor.The comparison circuit exports comparison signal for the output voltage of the motor and the size of threshold voltage, and according to comparison result.The control module is connect with the comparison circuit, for exporting control signal according to the comparison signal.The switching circuit is connected between the motor and the control module, for controlling the switch of the motor according to the control signal.When the motor rotation blockage, the output voltage of the motor is increased rapidly, and the output voltage for obtaining the circuit motor is greater than the threshold voltage, exports corresponding comparison signal.The control module receives the comparison signal, disconnects the motor by the switching circuit, prevents excessive electric current from burning out motor and motor circuit, effectively prevent damaging by the ring network cabinet of the motor driven.
Description
Technical field
The present invention relates to field of power systems, more particularly to a kind of circuit for controlling motor, control method and ring network cabinet.
Background technique
Motor is a kind of device for electric energy being converted into mechanical energy, uses the power on coil (stator winding) and generates rotating excitation field
The rotor coil being powered is set, by power, to form electro-magnetic motor force rotation torque in magnetic field, rotate rotor coil, thus electric energy
It is converted into mechanical energy.
When motor cisco unity malfunction for some reason, when rotor can not rotate, the electric current for flowing through motor increases rapidly
Greatly, the function that electric current is done all is used to generate thermal energy, may burn out motor and motor circuit.
Summary of the invention
Based on this, it is necessary to aiming at the problem that motor rotation blockage burns out motor and motor circuit, provide a kind of motor control electricity
Road, control method and ring network cabinet.
A kind of circuit for controlling motor includes motor, comparison circuit, control module and switching circuit.The comparison circuit and institute
State motor connection.The comparison circuit is for the output voltage of the motor and the size of threshold voltage, and according to comparing
As a result comparison signal is exported.The control module is connect with the comparison circuit.The control module is used for according to the comparison
Signal output control signal.The switching circuit is connected between the motor and the control module.The switching circuit is used
In the switch for controlling the motor according to the control signal.
In one embodiment, the circuit for controlling motor further includes amplifying circuit, and the amplifying circuit is connected to described
Between motor and the comparison circuit, for amplifying the output voltage of the motor.
In one embodiment, the amplifying circuit includes operational amplifier, resistance R4, resistance R5 and resistance R6, described
The noninverting input of operational amplifier is connect by the resistance R4 with the motor, the reverse input end of the operational amplifier
It is grounded by resistance R5, the reverse input end of the operational amplifier is connected to the output of the operational amplifier by resistance R6
End, the output end of the operational amplifier are connect with the comparison circuit.
In one embodiment, the amplifying circuit further includes resistance R7, and resistance R7 is connected to the output end and described
Between comparison circuit.
In one embodiment, the comparison circuit includes operational amplifier, resistance R8, resistance R9 and resistance R10, described
The non-inverting input terminal of operational amplifier is connected to reference voltage by resistance R9, and the non-inverting input terminal of the operational amplifier passes through
Resistance R8 ground connection, the inverting input terminal of the operational amplifier are connect with the motor, and the output end of the operational amplifier is logical
It crosses resistance R10 and is connected to the control module.
In one embodiment, the switching circuit includes relay, the relay be series at the control module with
Between the motor, for being opened or closed according to the control signal, so that the switch of the motor is controlled, the relay
Also connect to power supply.
In one embodiment, the switching circuit further includes switching tube, the control terminal of the switching tube and the control
Module connection, the input terminal of the switching tube are connected to power supply by the relay, the output end ground connection of the switching tube, institute
Switching tube is stated according to the control signal conduction or is not turned on, to control the closing or opening of the relay.
In one embodiment, the switching tube is NMOS tube, and the grid of the NMOS tube is connected with the control module,
The drain electrode of the NMOS tube is connect with the relay, the source electrode ground connection of the NMOS tube.
In one embodiment, the switching circuit further includes resistance R1, the control module by resistance R1 with it is described
The grid of NMOS tube connects.
In one embodiment, the switching circuit further includes resistance R2, the control module by resistance R2 with it is described
The source electrode of NMOS tube connects.
In one embodiment, the switching tube is triode, and the base stage of the triode is connect with the control module,
The collector of the triode is connect with the movable contact of the relay, the emitter ground connection of the triode.
In one embodiment, the control module is single-chip microcontroller, the signal input interface of the single-chip microcontroller and the ratio
Compared with circuit connection, the signal output port of the single-chip microcontroller is connect with the switching circuit.
This application provides a kind of motor control methods.The mode is suitable for above-mentioned circuit for controlling motor.The method
The following steps are included:
By the output voltage and threshold voltage of the comparison circuit motor, compared according to comparison result sending
Signal；
The control module issues control signal according to the comparison signal；
The switching circuit controls the switch of the motor according to the control signal.
In one embodiment, output voltage and the threshold value electricity that the step passes through the comparison circuit motor
Pressure, issuing comparison signal according to comparison result further comprises:
When the output voltage is higher than the threshold voltage, the comparison module issues low level to the control module
Comparison signal, and execute the switch that switching circuit described in step controls the motor according to the control signal, the switching molding
Root tuber controls the motor according to the control signal and closes.
Present invention also provides a kind of ring network cabinets.The ring network cabinet includes above-mentioned circuit for controlling motor, further includes transmission dress
It sets, operating stick and on-load switch, the motor control the load by the transmission device and operating stick mechanical connection
Opening a sluice gate/closing a floodgate for switch, realizes the division of the ring network cabinet.
The circuit for controlling motor that present application example provides passes through the output electricity of the comparison circuit motor
The size of pressure and threshold voltage.When the motor rotation blockage, the output voltage of the motor is increased rapidly, the comparison circuit energy
The difference for enough comparing the motor output voltage and the threshold voltage, exports corresponding comparison signal.The control module
The comparison signal is received, the working condition of the motor is controlled by the switching circuit, prevents excessive electric current from burning out
Motor and motor circuit effectively prevent damaging by the ring network cabinet of the motor driven.
Detailed description of the invention
Fig. 1 is the circuit for controlling motor module map according to one embodiment of the application；
Fig. 2 is the circuit for controlling motor figure according to one embodiment of the application；
Fig. 3 is the motor control method flow chart according to one embodiment of the application；
Fig. 4 is the ring network cabinet functional block diagram according to one embodiment of the application.
Description of symbols:
Circuit for controlling motor 10, motor 110, comparison circuit 120, control module 130, switching circuit 140, amplifying circuit
150；Motor control method 20；Ring network cabinet 30, transmission device 310, operating stick 320, on-load switch 330
Specific embodiment
As shown in Figure 1 or 2, this application provides a kind of circuit for controlling motor 10.The circuit for controlling motor 10 includes
Motor 110, comparison circuit 120, control module 130 and switching circuit 140.The comparison circuit 120 connects with the motor 110
It connects.The comparison circuit 120 is tied for the output voltage of the motor 110 and the size of threshold voltage, and according to comparing
Fruit exports comparison signal.The control module 130 is connect with the comparison circuit 120.The control module 130 is used for according to institute
State comparison signal output control signal.The switching circuit 140 is connected between the motor 110 and the control module 130.
The switching circuit 140 is used to control the switch of the motor 110 according to the control signal.
Circuit for controlling motor 10 provided by the present application passes through the output electricity of the comparison circuit 120 motor 110
The size of pressure and threshold voltage.When 110 stall of motor, the output voltage of the motor 110 is increased rapidly, described to obtain
The output voltage of the circuit motor 110 is greater than the threshold voltage, exports corresponding comparison signal.The control module
130 receive the comparison signal, disconnect the motor 110 by the switching circuit 140, prevent excessive electric current from burning out electricity
Machine and motor circuit.
Looped network refers to ring distribution system, i.e. supply main forms the annular being closed, and power supply is dry to this annular
Line power supply, passes through the outside distribution of high-voltage switch gear of each distribution branch again from main line.Ring network cabinet, which refers to, to be arranged in each distribution branch
The switchgear (outlet switch cabinet) of road, ring network cabinet can be the metal cabinet of integrated transmission & distribution electrical equipment (high-tension switch gear)
Or non-metallic insulation cabinet body, it can also be spliced by partition shelf.High-tension switch gear in ring network cabinet refers to fuse
On-load switch.On-load switch is the core component of ring network cabinet, and the open/close lock operation of ring network cabinet is the rotation of worker operation handle at present
Mode realize.The application, which provides the circuit for controlling motor 10, can be applied to ring network cabinet, and the motor 110 can be used
In the open/close lock for controlling ring network cabinet by transmission device and operating stick.It rotates, is saved manually without worker operation handle,
The problem of worker may get an electric shock is avoided, it is safer and efficient.
The switch of ring network cabinet be in rotation it is angled, when open/close lock, the motor 110 has preset rotational angle.?
In practical operation, the angle when angle of the motor 110 may be more than ring network cabinet open/close lock, the motor 110 will at this time
It is not able to rotate, causes 110 stall of motor, motor 110 can be damaged, it is also possible to damage the pull operation mechanism of ring network cabinet.Institute
It states circuit for controlling motor 10 and passes through the output voltage of the comparison circuit 120 motor 110 and the size of threshold voltage.
When 110 stall of motor, the output voltage of the motor 110 is increased rapidly, described to obtain the circuit motor 110
Output voltage be greater than the threshold voltage, export corresponding comparison signal.The control module 130 receives the relatively letter
Number, the motor 110 is disconnected by the switching circuit 140, prevent excessive electric current burn out the motor 110 and with it is described
The pull operation mechanism of the ring network cabinet of motor electrical connection.
In one embodiment, the circuit for controlling motor 10 further includes amplifying circuit 150.The amplifying circuit 150 connects
It is connected between the motor 110 and the comparison circuit 120.The amplifying circuit 150 is used to amplify the output of the motor 110
Voltage.The amplifying circuit 150 can amplify the output voltage of the motor 110, then compare described in the voltage input by amplification
Circuit 120 is compared convenient for the comparison circuit 120.
As shown in Fig. 2, in one embodiment, the amplifying circuit 150 includes operational amplifier, resistance R4, resistance R5
With resistance R6.The noninverting input 5 of the operational amplifier is connect by the resistance R4 with the motor 110.The operation
The reverse input end 6 of amplifier is grounded by resistance R5.The reverse input end 6 of the operational amplifier is connected to by resistance R6
The output end 7 of the operational amplifier.The output end 7 of the operational amplifier is connect with the comparison circuit 120.
In the above-described embodiments, the model of the operational amplifier (amplifier) can be LM358.The amplifying circuit 150
It can be in-phase proportion amplifying circuit 150.The input resistance of the amplifier is very high, and output resistance is very low.In one embodiment,
The resistance value of resistance R4 is 47K Ω, and the resistance value of resistance R6 is 18K Ω, and the resistance value of resistance R5 is 1K Ω.The output of the motor 110
Voltage is added to the non-inverting input terminal of amplifier by resistance R4, and the output voltage of the amplifier is fed back by resistance R5 and R6 to amplifier
Inverting input terminal, constitute series voltage negtive backword amplifying circuit 150.According to empty short concept, two input terminals of amplifier
Current potential is equal, and the voltage of non-inverting input terminal 5 and the voltage of reverse input end 6 are equal.Since the resistance value of resistance R4 is very big, with mutually defeated
The voltage for entering end 5 is equal to the output voltage of the motor 110.According to the disconnected concept of void, integrated operational amplifier input terminal is flowed into
Electric current is zero, and the electric current for flowing through resistance R6 is equal with the electric current for flowing through resistance R5.So V6/R5=(V7-V6)/R6, wherein V6
For the voltage (equal to the output voltage of the motor 110) of the reverse input end 6 of the amplifier, V7 is the output end of the amplifier
7 voltage, it is hereby achieved that the magnification ratio of the in-phase proportion amplifying circuit 150 is the output of V7 and the motor 110
The ratio of voltage is equal to 1+R6/R5.Therefore, the amplification factor of the amplifying circuit 150 depends on the resistance of resistance R6 and resistance R5
It is worth ratio.In the above-described embodiments, the resistance value of resistance R6 is 18K Ω, and the resistance value of resistance R5 is 1K Ω, then the amplifying circuit
150 magnification ratio is 18 times.
In one embodiment, the amplifying circuit 150 further includes resistance R7, and resistance R7 is connected to the output end and described
Between comparison circuit 120.In one embodiment, the resistance value of the R7 can be 10K Ω.The resistance R7 is used for current limliting, subtracts
The small electric current into the comparison circuit 120, protects the comparison circuit 120.
In one embodiment, the comparison circuit 120 includes operational amplifier, resistance R8, resistance R9 and resistance R10,
The non-inverting input terminal of the operational amplifier is connected to reference voltage, the non-inverting input terminal of the operational amplifier by resistance R9
Be grounded by resistance R8, the inverting input terminal of the operational amplifier is connect with the motor 110, the operational amplifier it is defeated
Outlet is connected to the control module 130 by resistance R10.
In the above-described embodiments, the model of the operational amplifier (amplifier) can be LM358.The LM358 is more electric
Road 120 can compare the size of two input voltages (110 output voltage of motor and threshold voltage), defeated with LM358 amplifier
The high level or low level of voltage out, indicates the size relation of described two input voltages.Specifically, when the LM358 amplifier
2 voltage of inverting input terminal when being higher than the non-inverting input terminal 3 of the operational amplifier, the output of the LM358 amplifier is low electricity
It is flat；It is described when 2 voltage of inverting input terminal of the LM358 amplifier is lower than the non-inverting input terminal 3 of the operational amplifier
The output of LM358 amplifier is high level.Fig. 2 is referred to, the threshold voltage is the voltage of the non-inverting input terminal 3 of the amplifier,
The output voltage of the motor 110 is the voltage of the reverse input end 2 of the amplifier.The electricity at resistance R8 and resistance R9 series connection both ends
Pressure is the difference of reference voltage and 0V (ground connection), and the threshold voltage is the voltage that resistance R9 divides, i.e. R9/ (R8+R9) * reference
Voltage.
In one embodiment, the resistance value of the resistance R8 is 10K Ω, and the resistance value of the resistance R9 is 33K Ω, the electricity
The resistance value for hindering R10 is 1K Ω.The reference voltage is 5V, then the threshold voltage is 5V*33/43=3.84V.When the motor
When 110 output voltage (the reception voltage of the i.e. described comparison circuit 120) is higher than 3.84V, event occurs for the motor 110 at this time
Barrier, the hot-wire coil of the motor 110 can not rotate, and the comparison circuit 120 is believed to the control module 130 output low level
Number.The control module 130 receives the low level signal, controls the switching circuit and disconnects the motor 110, prevent due to
The hot-wire coil of the motor 110, which can not rotate the excessive heat of generation, to be caused to burn out motor 110 and motor circuit.
In one embodiment, the amplifier in the comparison circuit 120 can pass through the resistance R7 and amplification electricity
Road 150 is connected.Resistance R7 can reduce the output electric current of the amplifying circuit 150, so that into the fortune of the comparison circuit 120
The electric current very little put protects the amplifier of the comparison circuit 120.Specifically, in the amplifying circuit 150 amplifier reversed input
End connects the motor 110 by the resistance R7 connection amplifying circuit 150.At this point, into the amplifying circuit 150
Voltage be amplified 110 voltage of motor, be more convenient for comparing.More amplified 110 voltage of motor of the amplifying circuit 150
With the threshold voltage, and to the control module 130 issue comparison signal.
In one embodiment, the control module 130 is single-chip microcontroller, the signal input interface 18 of the single-chip microcontroller and institute
The connection of comparison circuit 120 is stated, the signal output port 19 of the single-chip microcontroller is connect with the switching circuit 140.The single-chip microcontroller
Control process it is as follows: when 110 stall of motor, the comparison circuit 120 issues low level signal, and the single-chip microcontroller can
To receive the low level signal, issues control signal and disconnect the switching circuit 140；When the motor 110 works normally,
The comparison circuit 120 issues high level signal, and the single-chip microcontroller can receive the high level signal, not react, described
Switching circuit 140 remains closed.In another embodiment, the single-chip microcontroller receives the low level signal or the high level
After signal, two different control signals can be issued, disconnects or remains closed to control the switching circuit 140.Ying Li
Solution, can change the output of the monolithic machine control signal by software control method.The single-chip microcontroller further includes power circuit
And telecommunication circuit.The power circuit is used to power for the single-chip microcontroller.The telecommunication circuit is for instant to the single-chip microcontroller
Communication is read the operating status of the single-chip microcontroller and is controlled by the output for the control signal for changing the single-chip microcontroller.
In one embodiment, the switching circuit 140 includes relay.The switching circuit 140 includes relay, institute
Relay is stated to be series between the control module 130 and the motor 110.The relay is used for according to the control signal
It is opened or closed, to control the switch of the motor 110.The relay also connects to power supply.Specifically, the relay
Coil be series between the control module 130 and power supply, the contact of the relay is for being series at the power supply and institute
It states between motor 110, is opened or closed according to the control signal, to control the switch of the motor 110.Implement at one
In example, two contacts are to disconnect when the relay can be normally opened relay, i.e. coil no power, after energization, two contacts
With regard to closure.When the 110 coil normal rotation of motor, the comparison circuit 120 issues high level signal, the control module
130 issue high-level control signals, and the coil of the relay obtains electric, and the contact of the relay remains closed, the motor
110 keep access state.When 110 stall of motor, the comparison circuit 120 issues low level signal, the control mould
Block 130 issues low level control signal, and the contact of the coil losing electricity of the relay, the relay disconnects, the motor 110
It disconnects, to prevent excessive electric current from burning out motor and motor circuit, effectively prevents damaging by the looped network of the motor driven
Cabinet.
In one embodiment, the switching circuit 140 further includes switching tube.The control terminal of the switching tube and the control
Molding block 130 connects, and the input terminal of the switching tube is connected to power supply by the relay, the output termination of the switching tube
Ground.The switching tube is according to the control signal conduction or is not turned on, to control the closing or opening of the relay.
In one embodiment, the switching tube can be triode.The triode is series at the control module 130
Between the relay.Specifically, the base stage of the triode is connect with the control module 130, the collection of the triode
Electrode is connect with the coil of the relay, the emitter ground connection of the triode.The triode is according to the control signal
It is connected or is not turned on, to control the closing or opening of the relay.In one embodiment, the triode can be
NPN pipe.When the base stage input high level signal of the NPN pipe, the NPN pipe conducting.When 110 coil of motor normally turns
When dynamic, the comparison circuit 120 issues high level signal, and the control module 130 issues high-level control signal, the NPN
Pipe conducting, the coil of the relay obtains electric, and the contact of the relay remains closed, and the motor 110 keeps access state.
When 110 stall of motor, the comparison circuit 120 issues low level signal, and the control module 130 issues low level control
Signal processed, the NPN pipe end (being not turned on), the coil losing electricity of the relay, and the contact of the relay disconnects, the electricity
Machine 110 disconnects, to prevent excessive electric current from burning out motor and motor circuit, effectively prevents damaging by the motor driven
Ring network cabinet.
Referring again to Fig. 2, in one embodiment, the switching circuit 140 further includes NMOS tube.The grid of the NMOS tube
Pole is connected with the control module 130, and the drain electrode of the NMOS tube is connect with the relay, and the source electrode of the NMOS tube connects
Ground.As switching tube, the efficiency of the NMOS tube is higher than the triode.In one embodiment, the model of the NMOS tube
It can be Q27NMOS.
In one embodiment, the switching circuit 140 further includes resistance R1, and the control module 130 passes through resistance R1
It is connect with the grid of the NMOS tube.The resistance R1 can be used for current limliting.In one embodiment, the single-chip microcontroller exports
The electric current for controlling signal is 20mA, and it is about 9.1 μ A by the electric current after resistance R1 that the resistance value of resistance R1, which is 2.2K Ω, can be to prevent
Only high current damages the NMOS tube.
In one embodiment, the switching circuit 140 further includes resistance R2, and the control module 130 passes through resistance R2
It is connect with the source electrode of the NOS pipe.The resistance value of the resistance R2 can be 2.2K Ω.The resistance R2 ground connection, can remove institute in advance
The interference signal for stating single-chip microcontroller prevents from interfering the NMOS tube.
When the 110 coil normal rotation of motor, the comparison circuit 120 issues high level signal, the control mould
Block 130 issues high-level control signal, the NMOS transistor conduction, and the coil of the relay obtains electric, the contact of the relay
It remains closed, the motor 110 keeps access state.When 110 stall of motor, the comparison circuit 120 issues low electricity
Ordinary mail number, the control module 130 issue low level control signal, and the NMOS tube is ended, the coil losing electricity of the relay,
The contact of the relay disconnects, and the motor 110 disconnects, to prevent excessive electric current from burning out motor and motor circuit, has
Effect avoids damage by the ring network cabinet of the motor driven.
Referring to figure 3., present invention also provides a kind of motor control methods 20.The method is suitable for above-mentioned motor control
Circuit 10.The motor control method 20 the following steps are included:
S10 passes through the output voltage and threshold voltage of the comparison circuit 120 motor 110, ties according to comparing
Fruit issues comparison signal；
Control module 130 described in S20 issues control signal according to the comparison signal；
Switching circuit 140 described in S30 controls the switch of the motor 110 according to the control signal.
Motor control method 20 provided by the present application passes through the output electricity of the comparison circuit 120 motor 110
The size of pressure and threshold voltage.When 110 stall of motor, the output voltage of the motor 110 is increased rapidly, described to obtain
The output voltage of the circuit motor 110 is greater than the threshold voltage, exports corresponding comparison signal.The control module
130 receive the comparison signal, issue corresponding control signal, disconnect the motor 110 by the switching circuit 140,
It prevents excessive electric current from burning out motor and motor circuit, effectively prevents damaging by the ring network cabinet of the motor driven.
In one embodiment, the step S10 further comprises S110: when the output voltage is higher than the threshold value electricity
When pressure, the comparison module issues low level comparison signal to the control module 130, and executes step S30, the switch electricity
Road 140 controls the motor 110 according to the control signal and closes.
Fig. 4 is referred to, present invention also provides a kind of ring network cabinets 30.The ring network cabinet 30 includes in any of the above-described embodiment
Circuit for controlling motor 10.The ring network cabinet 30 further includes transmission device 310, operating stick 320 and on-load switch.The motor
110 are mechanically connected by the transmission device 310 with the operating stick 320, and opening a sluice gate/closing a floodgate for the on-load switch is controlled, from
And realize the division of the ring network cabinet 30.Specifically, the operating stick 320 is mechanically connected with the on-load switch.The operation
Bar 320 can be by controlling the switch of ring network cabinet 30 described in the opening a sluice gate of the on-load switch 330/shutting-brake control.Implement at one
In example, the transmission device 310 may include 110 gear of motor worked in coordination and operation gear.110 gear of motor is set
It is placed in the motor 110.The operation gear is set to the operating stick 320.110 gear of motor and the operation gear
Engaged transmission, so that the operating stick 320 being mounted on operation gear be driven to carry out division operation.When the motor 110 is sent out
Raw failure, when coil does not rotate, the circuit for controlling motor 10 disconnects the motor 110, then is controlled by the transmission device 310
Making the operating stick 320 disconnects the ring network cabinet 30, avoids described in the excessive heat of 110 stall of motor generation is burnt out
Ring network cabinet 30.
Looped network refers to ring distribution system, i.e. supply main forms the annular being closed, and power supply is dry to this annular
Line power supply, passes through the outside distribution of high-voltage switch gear of each distribution branch again from main line.Ring network cabinet, which refers to, to be arranged in each distribution branch
The switchgear (outlet switch cabinet) of road, ring network cabinet can be the metal cabinet of integrated transmission & distribution electrical equipment (high-tension switch gear)
Or non-metallic insulation cabinet body, it can also be spliced by partition shelf.High-tension switch gear in ring network cabinet refers to fuse
On-load switch.On-load switch is the core component of ring network cabinet, and the open/close lock operation of ring network cabinet is the rotation of worker operation handle at present
Mode realize.In ring network cabinet 30 provided by the present application, the motor 110 passes through the transmission device 310 and the behaviour
Make the mechanical connection of bar 320, opening a sluice gate/closing a floodgate for the on-load switch is controlled, to realize the division of the ring network cabinet 30.Without work
The rotation of people's operating handle, saves manually, avoids the problem of worker may get an electric shock, safer and efficient.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (15)
1. a kind of circuit for controlling motor characterized by comprising
Motor (110)；
Comparison circuit (120) is connect with the motor (110), output voltage and the threshold value electricity for the motor (110)
The size of pressure, and comparison signal is exported according to comparison result；
Control module (130) is connect with the comparison circuit (120), for exporting control signal according to the comparison signal；
Switching circuit (140) is connected between the motor (110) and the control module (130), for according to the control
Signal controls the switch of the motor (110).
2. circuit for controlling motor as described in claim 1, which is characterized in that it further include amplifying circuit (150), the amplification electricity
Road (150) is connected between the motor (110) and the comparison circuit (120), for amplifying the described of the motor (110)
Output voltage.
3. circuit for controlling motor as claimed in claim 2, which is characterized in that the amplifying circuit (150) includes operation amplifier
The noninverting input of device, resistance R4, resistance R5 and resistance R6, the operational amplifier pass through the resistance R4 and the motor
(110) it connects, the reverse input end of the operational amplifier is grounded by resistance R5, the reverse input end of the operational amplifier
The output end of the operational amplifier, the output end of the operational amplifier and the comparison circuit are connected to by resistance R6
(120) it connects.
4. circuit for controlling motor as claimed in claim 3, which is characterized in that the amplifying circuit (150) further includes resistance R7,
Resistance R7 is connected between the output end and the comparison circuit (120).
5. circuit for controlling motor as described in claim 1, which is characterized in that the comparison circuit (120) includes operation amplifier
Device, resistance R8, resistance R9 and resistance R10, the non-inverting input terminal of the operational amplifier are connected to reference voltage by resistance R9,
The non-inverting input terminal of the operational amplifier is grounded by resistance R8, the inverting input terminal of the operational amplifier and the motor
(110) it connects, the output end of the operational amplifier is connected to the control module (130) by resistance R10.
6. circuit for controlling motor as described in claim 1, which is characterized in that the switching circuit (140) includes relay, institute
Relay is stated to be series between the control module (130) and the motor (110), for according to the control signal disconnection or
Closure, to control the switch of the motor (110), the relay is also connected to power supply.
7. circuit for controlling motor as claimed in claim 6, which is characterized in that the switching circuit (140) further includes switching tube,
The control terminal of the switching tube is connect with the control module (130), the input terminal of the switching tube by the relay with
Power supply connection, the output end ground connection of the switching tube, the switching tube is according to the control signal conduction or is not turned on, to control
Make the closing or opening of the relay.
8. circuit for controlling motor as claimed in claim 7, which is characterized in that the switching tube is NMOS tube, the NMOS tube
Grid be connected with the control module, the drain electrode of the NMOS tube is connect with the relay, and the source electrode of the NMOS tube connects
Ground.
9. circuit for controlling motor as claimed in claim 8, which is characterized in that the switching circuit (140) further includes resistance R1,
The control module (130) is connect by resistance R1 with the grid of the NMOS tube.
10. circuit for controlling motor as claimed in claim 8, which is characterized in that the switching circuit (140) further includes resistance
R2, the control module (130) are connect by resistance R2 with the source electrode of the NMOS tube.
11. circuit for controlling motor as claimed in claim 7, which is characterized in that the switching tube is triode, the triode
Base stage connect with the control module (130), the collector of the triode is connect with the relay, the triode
Emitter ground connection.
12. circuit for controlling motor as described in claim 1, which is characterized in that the control module (130) is single-chip microcontroller, institute
The signal input interface for stating single-chip microcontroller is connect with the comparison circuit (120), the signal output port of the single-chip microcontroller with it is described
Switching circuit (140) connection.
13. a kind of motor control method, is suitable for the described in any item circuit for controlling motor of claim 1-10, feature exists
In, comprising the following steps:
By the output voltage and threshold voltage of the comparison circuit motor, letter is compared according to comparison result sending
Number；
The control module issues control signal according to the comparison signal；
The switching circuit controls the switch of the motor according to the control signal.
14. circuit for controlling motor as claimed in claim 11, which is characterized in that the step is compared by the comparison circuit
The output voltage and threshold voltage of the motor, issuing comparison signal according to comparison result further comprises:
When the output voltage is higher than the threshold voltage, the comparison module issues low level to the control module and compares
Signal, and execute the switch that switching circuit described in step controls the motor according to the control signal, the switching molding root tuber
The motor is controlled according to the control signal to close.
15. a kind of ring network cabinet, including the described in any item circuit for controlling motor of claim 1-12, which is characterized in that further include
Transmission device (310), operating stick (320) and on-load switch (330), the motor (110) by the transmission device (310) with
Operating stick (320) mechanical connection, controls opening a sluice gate/closing a floodgate for the on-load switch (330), realizes the ring network cabinet (30)
Division.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910288725.8A CN109873403A (en) | 2019-04-11 | 2019-04-11 | Circuit for controlling motor, control method and ring network cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910288725.8A CN109873403A (en) | 2019-04-11 | 2019-04-11 | Circuit for controlling motor, control method and ring network cabinet |
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| CN109873403A true CN109873403A (en) | 2019-06-11 |
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| CN201910288725.8A Pending CN109873403A (en) | 2019-04-11 | 2019-04-11 | Circuit for controlling motor, control method and ring network cabinet |
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| CN112737100A (en) * | 2020-12-02 | 2021-04-30 | 深圳供电局有限公司 | Ring main unit touch screen control system |
| CN115499573A (en) * | 2022-09-19 | 2022-12-20 | 杭州海康威视数字技术股份有限公司 | Video camera |
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| CN201312297Y (en) * | 2008-12-05 | 2009-09-16 | 中国北车股份有限公司大连电力牵引研发中心 | Relay output circuit with state feedback function |
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Application publication date: 20190611 |