CN105048883A - Starting given voltage generation device of electric motor - Google Patents
Starting given voltage generation device of electric motor Download PDFInfo
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- CN105048883A CN105048883A CN201510534325.2A CN201510534325A CN105048883A CN 105048883 A CN105048883 A CN 105048883A CN 201510534325 A CN201510534325 A CN 201510534325A CN 105048883 A CN105048883 A CN 105048883A
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Abstract
The invention relates to a starting given voltage generation device of an electric motor. The starting given voltage generation device comprises an input voltage given module, a signal amplification module, an integration module and a negative feedback module, wherein the input voltage given module is used for giving and adjusting an input voltage, the input end of the input voltage given module is connected with the input end of the signal amplification module, the output end of the signal amplification module is connected with the input end of the integration module, and the output end of the integration module is a signal output end of the generation device and is connected to the input end of the signal amplification module via the negative feedback module. In the generation device, the integration module can be used for converting a given step signal into a ramp signal, thus, high impact on electric motor starting brought by step reference is eliminated, the harm brought by the working of the electric motor at an abnormal rotational speed is solved, the voltage, the current, and the torque and the rotational speed of the electric motor of the system can be stably increased, meanwhile, the service life of the electric motor is also prolonged, and the system reliability is improved.
Description
Technical field
The present invention relates to the generation device of the given voltage of a kind of electric motor starting, belong to slip electric motor speed adjusting technique field.
Background technology
Current slip electric motor speed setting controller is used for completing of ZLK-10 automatic speed regulation system, the structure composition of speed setting controller is shown in Fig. 1, and the given input voltage of motor and the difference of output voltage give motor successively after amplifier, trigger, silicon controlled rectifier and slip clutch.Usually when to slip electric motor speed governing, armrest moves the given potentiometer of governing speed often, the given potentiometer of general speed has littlely to regulate to large carrying out, the rotating speed of corresponding slip electric motor is then have low to high change, because given potentiometer has manual adjustments, this just inevitably there will be: if the governing speed of given potentiometer is fast, and the output voltage of corresponding speed regulator is just high, slip electric motor faster rotational speed, on the contrary speed step-down.And the rotating speed of slip electric motor directly goes to affect by manual adjustments speed speed; for the characteristic that ZLK-10 speed regulator is intrinsic; consider that slip electric motor running can touch equipment and personal safety factor; so; will after each equipment downtime; allow speed preset potentiometer rotate to zero position as initial condition, the equipment that ensures like this is zero output after activation.If there is misoperation or forget regulator potentiometer return-to-zero in speed preset potentiometer; speed regulator after equipment starts will be caused to have certain output voltage or maximum voltage to export at once; this improper output valve; the precipitate rotation of slip electric motor will be caused; this improper rotating speed can crisis to the safety of equipment or personnel; even cause equipment or personal injury, but also the production and operation of enterprise can be caused to be subject to certain economic loss, this is breakneck.
And, when slip electric motor starts, if the input enabling signal of given speed setting controller is Step reference signal, slip electric motor will receive suddenly a very large detent torque when starting, just very large noise and very large vibration is produced during startup, and can cause larger impact to slip electric motor, and motor works and can bring certain harm under abnormal rotational speed, can affect the life-span of motor to a certain extent for a long time in the past.
Summary of the invention
The object of this invention is to provide the generation device of the given voltage of a kind of electric motor starting, during in order to solve electric motor starting, motor is caused to the problem of greater impact.
For achieving the above object, the solution of the present invention comprises the generation device of the given voltage of a kind of electric motor starting, comprise the given module of input voltage, signal amplification module, integration module and negative feedback module, the given module of input voltage is used for given and regulates input voltage, the output of the given module of input voltage connects the input of described signal amplification module, the output of signal amplification module connects the input of integration module, the output of integration module is the signal output part of described generation device, the output of integration module is connected to the input of described signal amplification module by described negative feedback module.
The given module of described input voltage comprises the first rheostat, regulates described input voltage by regulating described first rheostatic resistance value.
Described signal amplification module comprises the first operational amplifier, the output of the given module of described input voltage connects the in-phase input end of described first operational amplifier, the reverse inter-input-ing ending grounding of the first operational amplifier, the output of described first operational amplifier connects the input of described integration module.
Described integration module comprises the second operational amplifier, the output of described signal amplification module is by the second rheostat ground connection, the output of described signal amplification module connects the inverting input of described second operational amplifier by resistance R4, the voltage input end of one setting connects the in-phase input end of described second operational amplifier by electric capacity C3, the output of described second operational amplifier connects the inverting input of described second operational amplifier by electric capacity C4, the output of described second operational amplifier is the signal output part of described generation device.
Described negative feedback module is resistance R6, and the output of described integration module is connected to the input of described signal amplification module by resistance R6.
Integration module is introduced to the Setting signal of motor of adjusting in the generation device of the given voltage of this electric motor starting, the speed preset signal of slip electric motor speed regulating control is increased a given integration module as soft start link, object is for meeting the steady lifting speed slowly of motor, integration module is utilized to change given step signal into ramp signal, to eliminate the large impact excessively that Step reference brings electric motor starting, the harm that solution motor works and brings under abnormal rotational speed, make the voltage in system, electric current, motor torque and rotating speed can grow steadily, also extend the useful life of motor simultaneously, the reliability of raising system.
Further, this generation device structure is simple, and do not relate to the component devices of complexity or costliness, cost of investment is low, but effectively can improve the startup situation of motor.
Accompanying drawing explanation
Fig. 1 is the control block diagram of motor speed regulation system;
Fig. 2 is the control block diagram of the generation device of the given voltage of electric motor starting;
Fig. 3 is the circuit diagram of the generation device of the given voltage of electric motor starting;
Fig. 4 is the oscillogram of each point voltage;
Fig. 5 is the pin arrangements figure of LM324.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
As shown in Figure 1, motor do to determining voltage signal and feedback signal to differ from after, after amplifier, trigger, silicon controlled rectifier and slip clutch, motor is exported on a road successively, and another road is above-mentioned feedback signal.
Wherein, the determining voltage signal of giving of motor is exported by the generation device of the given voltage of electric motor starting.As shown in Figure 2, the generation device of the given voltage of electric motor starting comprises the given module of input voltage, signal amplification module, integration module and negative feedback module, the given module of input voltage is used for given and regulates input voltage, the input of the output connection signal amplification module of the given module of input voltage, the output of signal amplification module connects the input of integration module, the output of integration module is the signal output part of generation device, and the output of integration module is connected to the input of signal amplification module by negative feedback module.
Particularly, as shown in Figure 3, one end that the given module of input voltage comprises resistance R8, potentiometer DW0 ,+15V voltage is connected to potentiometer DW0 by resistance R8, the other end ground connection of potentiometer DW0, changes the size of input voltage by regulator potentiometer DW0.
Signal amplification module comprises operational amplifier Q1:A, the in-phase input end of the adjustable side concatenation operation amplifier Q1:A of potentiometer DW0, the reverse inter-input-ing ending grounding of operational amplifier Q1:A.
Integration module comprises operational amplifier Q1:B, forms an integrator by some components and parts of operational amplifier Q1:B and its periphery.One end of the output contact resistance R2 of operational amplifier Q1:A, the other end of resistance R2 is divided into two-way, lead up to rheostat R3 ground connection, separately lead up to the inverting input of resistance R4 concatenation operation amplifier Q1:B, + 15V voltage is by the in-phase input end of electric capacity C3 concatenation operation amplifier Q1:B, the in-phase input end of operational amplifier Q1:B is by resistance R5 ground connection, the output of operational amplifier Q1:B passes through the inverting input of electric capacity C4 concatenation operation amplifier Q1:B, the output of operational amplifier Q1:B connects the signal output part of this generation device by resistance R7.Wherein, the length regulating R3 can realize the time of integration regulates; The effect of C3 is after serving electricity, does not allow the output of operational amplifier Q1:B have negative output.
Negative feedback module is resistance R6, and the output of operational amplifier Q1:B is connected to the in-phase input end of operational amplifier Q1:A by resistance R6.
Pass through+15V voltage, resistance R8 and potentiometer DW0 and can input the given voltage signal of adjustable motor, can show that potentiometer DW0 maximum regulation voltage is 5 volts by calculating, computing formula is as follows:
Static multiplication factor due to operational amplifier Q1:A is 1 (R6/R1), so when the input of operational amplifier Q1:A is from zero to+5V, maximum output is zero to-5V, and computing formula is as follows:
Because operational amplifier Q1:A is Open-loop amplifier, there is high multiplication factor (hundreds of thousands is to millions of times), so in the process terminated to integration after control signal adds, the output of Q1:A is constant saturation value, it forms a fast regulex, can the time of integration be changed by the resistance of the rheostat R3 changing the output of Q1:A, thus the integral process of any speed of adjusting.
5 pin of operational amplifier Q1:B are by+15V to C3 capacitor charging, and the effect of C3 is after serving electricity, do not allow 7 pin of operational amplifier Q1:B have negative output.Because C3 meets+15V ,+15V is to after C3 charging, and 7 pin of operational amplifier Q1:B, by the output of positive tens volts, ensure given normal output.
Operational amplifier Q1:B and resistance R4, R5 and electric capacity C4 etc. form an integrator, and resistance R4, R5 are input pickup resistance, and capacitor C4 is integrator electric capacity.
The output end voltage U of operational amplifier Q1:B
sCthe input terminal voltage U of (being also the output voltage of integrator) and operational amplifier Q1:B
r3pass be:
Work as U
r5during for definite value:
Draw according to above-mentioned computing formula, output voltage U
sCt makes linear increment in time, U
r3when being worth larger, output voltage changes faster in time; And integration time constant R4*C4 is larger, output voltage is slower over time, changes U
r3rate over time, namely changes the acceleration of motor.
The output voltage of operational amplifier Q1:B is again by the in-phase input end of R6 resistance feedback to Q1:A operational amplifier, and it is a negative feedback, and R6=R1.Therefore output voltage U
sCtime equal with the voltage U sr exported by potentiometer DW0, the output voltage of operational amplifier Q1:A is 0, i.e. comparative voltage U
r3=0, operational amplifier Q1:B stops integration.Therefore, when input end signal voltage U sr Spline smoothing, the change in voltage of this circuit each point as shown in Figure 4.
In Fig. 4, when t=0 time, operational amplifier Q1:A inputs positive step voltage U sr, and Q1:A operational amplifier exports as positive saturation value, U
r3for "+" value, integrator starts negative sense integration, buncher slow start.When being integrated to output end voltage U
sCduring=Usr, operational amplifier Q1:A exports and is 0, and operational amplifier Q1:B stops integration, maintains output voltage U
sCconstant, the stabilization of speed running that motor is corresponding under the command signal of Usr magnitude of voltage.
In the t2 moment, there is a negative step (namely speed command signal disappears) in input, the effect due to R6 resistance feedback makes Q1:A oppositely saturated, U
r3for negative value, operational amplifier Q1:B forward integration, motor slowly slows down.When integrator is integrated to U
sCduring=Usr=0, Q1:A operational amplifier loss signal, Q1:B operational amplifier stops integration again, adjustable-speed motor stall.
As can be seen from Figure 4: be motor accelerating sections from 0 ~ t1 section, R3 potentiometer can be passed through and (change U
r3), i.e. adjustable U
sCthe slope risen, is equivalent to the slope regulating Ug to rise in governing system, that is acceleration, is motor deceleration section from t2 ~ t3 section, can pass through R3 potentiometer and (change U
r3), i.e. adjustable U
sCthe slope declined, is equivalent to the slope regulating Ug to decline in governing system, that is deceleration.The total buffer time of buffer control unit is 6 ~ 20 seconds.As strengthened the capacity of integrating capacitor C4, then also buffer time can be extended.
Operational amplifier Q1:A and Q1:B can use wherein two amplifiers in LM324, and LM324 is the large device of four high guaily unit, and as shown in Figure 5, it adopts 14 pin dual-in-line Plastic Package.Its inside comprises four groups of identical operational amplifiers of form, and except power sharing, four groups of amplifiers are separate.
Be presented above concrete execution mode, but the present invention is not limited to described execution mode.Such as: this gives the concrete numerical value of each resistance and the concrete numerical value of electric capacity, but the numerical value provided is just in order to illustrate, and the present invention is not limited to this concrete numerical value.The change carried out execution mode without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (5)
1. the generation device of the given voltage of electric motor starting, it is characterized in that, comprise the given module of input voltage, signal amplification module, integration module and negative feedback module, the given module of input voltage is used for given and regulates input voltage, the output of the given module of input voltage connects the input of described signal amplification module, the output of signal amplification module connects the input of integration module, the output of integration module is the signal output part of described generation device, the output of integration module is connected to the input of described signal amplification module by described negative feedback module.
2. the generation device of the given voltage of electric motor starting according to claim 1, is characterized in that, the given module of described input voltage comprises the first rheostat, regulates described input voltage by regulating described first rheostatic resistance value.
3. the generation device of the given voltage of electric motor starting according to claim 1, it is characterized in that, described signal amplification module comprises the first operational amplifier, the output of the given module of described input voltage connects the in-phase input end of described first operational amplifier, the reverse inter-input-ing ending grounding of the first operational amplifier, the output of described first operational amplifier connects the input of described integration module.
4. the generation device of the given voltage of electric motor starting according to claim 1, it is characterized in that, described integration module comprises the second operational amplifier, the output of described signal amplification module is by the second rheostat ground connection, the output of described signal amplification module connects the inverting input of described second operational amplifier by resistance R4, the voltage input end of one setting connects the in-phase input end of described second operational amplifier by electric capacity C3, the output of described second operational amplifier connects the inverting input of described second operational amplifier by electric capacity C4, the output of described second operational amplifier is the signal output part of described generation device.
5. the generation device of the given voltage of electric motor starting according to claim 1, is characterized in that, described negative feedback module is resistance R6, and the output of described integration module is connected to the input of described signal amplification module by resistance R6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510534325.2A CN105048883A (en) | 2015-08-27 | 2015-08-27 | Starting given voltage generation device of electric motor |
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|---|---|---|---|
| CN201510534325.2A CN105048883A (en) | 2015-08-27 | 2015-08-27 | Starting given voltage generation device of electric motor |
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| CN105048883A true CN105048883A (en) | 2015-11-11 |
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| CN201510534325.2A Pending CN105048883A (en) | 2015-08-27 | 2015-08-27 | Starting given voltage generation device of electric motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826918A (en) * | 2017-01-03 | 2017-06-13 | 深圳市众为创造科技有限公司 | Mechanical arm adjusting process, mechanical arm calibration apparatus and mechanical arm |
| CN114047718A (en) * | 2021-10-19 | 2022-02-15 | 华帝股份有限公司 | Door control circuit and door body opening and closing device |
Citations (5)
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| CN2114240U (en) * | 1992-02-24 | 1992-08-26 | 河南纺织科学技术研究所 | Dc motor-driven synchronous control device |
| CN1309464A (en) * | 2000-12-01 | 2001-08-22 | 湘潭电气设备制造有限责任公司 | Electronic analog controller of electric shovel |
| CN2521823Y (en) * | 2002-01-11 | 2002-11-20 | 湘潭电气设备制造有限责任公司 | Electric shovel electronic analog control device |
| CN201577061U (en) * | 2010-01-14 | 2010-09-08 | 黑龙江科技学院 | Electric machine control device of a mine hoist |
| CN204835988U (en) * | 2015-08-27 | 2015-12-02 | 河南省通信电缆有限公司 | Device for generating motor starts preset voltage |
-
2015
- 2015-08-27 CN CN201510534325.2A patent/CN105048883A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114240U (en) * | 1992-02-24 | 1992-08-26 | 河南纺织科学技术研究所 | Dc motor-driven synchronous control device |
| CN1309464A (en) * | 2000-12-01 | 2001-08-22 | 湘潭电气设备制造有限责任公司 | Electronic analog controller of electric shovel |
| CN2521823Y (en) * | 2002-01-11 | 2002-11-20 | 湘潭电气设备制造有限责任公司 | Electric shovel electronic analog control device |
| CN201577061U (en) * | 2010-01-14 | 2010-09-08 | 黑龙江科技学院 | Electric machine control device of a mine hoist |
| CN204835988U (en) * | 2015-08-27 | 2015-12-02 | 河南省通信电缆有限公司 | Device for generating motor starts preset voltage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826918A (en) * | 2017-01-03 | 2017-06-13 | 深圳市众为创造科技有限公司 | Mechanical arm adjusting process, mechanical arm calibration apparatus and mechanical arm |
| CN114047718A (en) * | 2021-10-19 | 2022-02-15 | 华帝股份有限公司 | Door control circuit and door body opening and closing device |
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Application publication date: 20151111 |
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