CN104465015A - Electromagnet driving circuit for cloth pressing mechanism - Google Patents
Electromagnet driving circuit for cloth pressing mechanism Download PDFInfo
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- CN104465015A CN104465015A CN201410712245.7A CN201410712245A CN104465015A CN 104465015 A CN104465015 A CN 104465015A CN 201410712245 A CN201410712245 A CN 201410712245A CN 104465015 A CN104465015 A CN 104465015A
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Abstract
The invention relates to an electromagnet driving circuit for a cloth pressing mechanism and belongs to the field of the electronic technology. The electromagnet driving circuit for the cloth pressing mechanism comprises a low-pass filtering amplification circuit, an on-off control circuit, a PWM control signal generation circuit, a first field-effect transistor, a second field-effect transistor and a sampling resistor, wherein the on-off control circuit is used for controlling the on-off state between the drain electrode and the source electrode of the second field-effect transistor so as to control on-off of an electromagnet, the low-pass filtering amplification circuit converts a PWM reference signal output by a microcontroller into a corresponding direct-current voltage signal and amplifying the direct-current voltage signal by certain times, the PWM control signal generation circuit compares the direct-current voltage signal with sampling voltage applied to the sampling resistor in real time and adjusts a PWM control signal output by the PWM control signal generation circuit and used for controlling the output current of the drain electrode of the first field-effect transistor according to the voltage difference between the direct-current voltage signal and the sampling voltage, and then the purpose of constant current of the electromagnet is realized. According to the electromagnet driving circuit for the cloth pressing mechanism, the pressure of the cloth pressing mechanism can be adjusted flexibly, and the pressure of the cloth pressing mechanism is made stable.
Description
Technical field
The present invention relates to a kind of solenoid driver circuit, particularly a kind of solenoid driver circuit of presser, adopt constant current drive mode.
Background technology
In existing sewing machine industry, automatic edge-adjusting machine is typically provided with presser.When conveyor belt carrying pieces of cloth are sent into before sewing machine, the adhesive needing presser to pass through to control electromagnet to the suitable pressure of pieces of cloth one, for keeping the smooth of pieces of cloth.When pieces of cloth send into presser, pressure too conference makes the out-of-flatness of pieces of cloth, affects sewing quality.Control adopts usually electromagnet drive presser, regulate presser to the pressure of pieces of cloth by the mode of regulating magnet pressure.
The drive circuit of electromagnet, as backstitched, the drive circuit such as presser foot lifter, trimming, adopts constant pressure source usually.The operating voltage of this electromagnet is fixing, the size of the suction-combining force selects the electromagnet of different operating voltage as required, and the electromagnet be operated under pressure constant state is because long-time constant conduction electric current, electromagnet caloric value can be caused large, make to flow through electromagnet current and reduce.Use the presser of this kind of solenoid driver circuit, the pressure of presser being caused to reduce because using for a long time, affecting actual compress performance, harmful effect being produced to cloth sewing quality, also can cause the vibration that presser is larger and noise simultaneously.
Summary of the invention
The object of the invention is to for the problems referred to above, provide a kind of solenoid driver circuit of presser, make the pressure stability of presser, play simultaneously and reduce the vibration of presser and the effect of noise.
The object of the present invention is achieved like this:
A solenoid driver circuit for presser, is characterized in that, comprises low-pass filtering amplifying circuit, ON-OFF control circuit, pwm control signal generation circuit, the first field effect transistor, the second field effect transistor and sampling resistor;
The PWM reference signal output of the input termination microcontroller of described low-pass filtering amplifying circuit, the output termination pwm control signal of low-pass filtering amplifying circuit produces the reverse input end of circuit, pwm control signal produces the grid of output termination first field effect transistor of circuit, the drain electrode of the first field effect transistor connects solenoid actuated power supply, the source electrode of the first field effect transistor connects one end of electromagnet, the level signal output of the input termination microcontroller of ON-OFF control circuit, the grid of output termination second field effect transistor of ON-OFF control circuit, the drain electrode of the second field effect transistor connects the other end of electromagnet, source electrode ground connection after sampling resistor of the second field effect transistor, lead-out wire between the source electrode of the second field effect transistor and sampling resistor connects the positive input that pwm control signal produces circuit,
The level signal that described ON-OFF control circuit exports according to microcontroller exports the grid controlling signal to the second field effect transistor accordingly, for controlling the break-make between the drain electrode of the second field effect transistor and source electrode, thus controls the break-make of electromagnet;
The PWM reference signal that microcontroller exports by described low-pass filtering amplifying circuit converts corresponding d. c. voltage signal to and amplifies by specific factor;
Described pwm control signal produces circuit and compares in real time low-pass filtering the amplifying circuit d. c. voltage signal exported and the sampled voltage be applied on sampling resistor, and regulate pwm control signal to produce the pwm control signal of circuit output according to both voltage differences, this pwm control signal is for controlling the output current of the drain electrode of the first field effect transistor, thus regulate the electric current flowing through electromagnet, make sampled voltage equal the d. c. voltage signal of low-pass filtering amplifying circuit output, realize the object of electromagnet constant current.
Wherein, the drain electrode of described second field effect transistor also connects the positive pole of the first diode, and the negative pole of this first diode connects solenoid actuated power supply.
Wherein, described ON-OFF control circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first triode, the second triode and the second diode;
One termination 3.3V voltage of described 8th resistance, one end of another termination first resistance, the other end of described first resistance connects one end of the second resistance and the base stage of the first triode respectively, the other end of described second resistance and the equal ground connection of emitter of the first triode, the collector electrode of described first triode connects one end of the 3rd resistance respectively, one end of 4th resistance and one end of the 5th resistance, another termination 15V voltage of described 3rd resistance, the other end of described 4th resistance connects one end of the 6th resistance and the base stage of the second triode respectively, the collector electrode of described second triode connects 15V voltage, the emitter of the second triode connects the other end of the 6th resistance and one end of the 7th resistance respectively, the positive pole of another termination second diode of described 7th resistance, the negative pole of described second diode connects the other end of the 5th resistance,
Lead-out wire between described first resistance and the 8th resistance connects the level signal output of microcontroller; Lead-out wire between described 7th resistance and the second diode connects the grid of the second field effect transistor.
Wherein, described low-pass filtering amplifying circuit comprises the 9th resistance, the first electric capacity, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the first operational amplifier and the second operational amplifier;
The PWM reference signal output of one termination microcontroller of described 9th resistance, the other end is ground connection after the first electric capacity;
The positive input of described first operational amplifier connects the lead-out wire between the 9th resistance and the first electric capacity, and reverse input end is ground connection and connect its output after the 11 resistance after the tenth resistance respectively;
The positive input of described second operational amplifier connect respectively the first operational amplifier output and after the 12 resistance ground connection, reverse input end connects its output after the 13 resistance, and output is ground connection after the 14 resistance and the 15 resistance successively;
Lead-out wire between described 14 resistance and the 15 resistance connects the reverse input end that pwm control signal produces circuit.
Wherein, described pwm control signal generation circuit comprises frequency fixing PWM chip, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance and the second electric capacity;
The in-phase signal end of the first error amplifier of described frequency fixing PWM chip connects the lead-out wire between the source electrode of the second field effect transistor and sampling resistor after the 18 resistance, the output of the inversion signal termination low-pass filtering amplifying circuit of the first error amplifier, compensating element, link connects the inversion signal end of the first error amplifier after the 17 resistance, the external oscillating capacitance link of oscillator ground connection after the second electric capacity, the external oscillation resistance link of oscillator ground connection after the 19 resistance, first push-pull circuit inversion signal output connect respectively the first field effect transistor grid and after the 20 resistance ground connection, second push-pull circuit inversion signal output is unsettled, working power voltage input termination 24V operating voltage, reference power supply output connects the inversion signal end of the second error amplifier after the 16 resistance, all the other dead zone function signal input parts, first push-pull circuit in-phase signal output, second push-pull circuit in-phase signal output, the in-phase signal end all directly ground connection of way of output setting signal input and the second error amplifier.
Beneficial effect of the present invention is:
1) adopt constant current drive mode, electric current can not be changed, therefore the pressure stability of presser with the heating of electromagnet, vibrate little, noise is little.
2) can real-time regulating magnet electric current as required, realize the adjustable flexibly of the pressure of presser.
Accompanying drawing explanation
Fig. 1 is overall structure block diagram of the present invention.
Fig. 2 is the schematic diagram of ON-OFF control circuit.
Fig. 3 is the schematic diagram of low-pass filtering amplifying circuit.
Fig. 4 is the schematic diagram that pwm control signal produces circuit.
Embodiment
Below in conjunction with specific embodiments and the drawings, set forth the present invention further.
As shown in Figure 1, a kind of solenoid driver circuit of presser, comprises low-pass filtering amplifying circuit 1, ON-OFF control circuit 3, pwm control signal generation circuit 2, first field effect transistor CS1, the second field effect transistor CS2 and sampling resistor R.
The PWM reference signal output of the input termination microcontroller 4 of described low-pass filtering amplifying circuit 1, the output termination pwm control signal of low-pass filtering amplifying circuit 1 produces the reverse input end of circuit 2, pwm control signal produces the grid of the output termination first field effect transistor CS1 of circuit 2, the drain electrode of the first field effect transistor CS1 connects solenoid actuated power supply, the source electrode of the first field effect transistor CS1 connects one end of electromagnet 5, the level signal output of the input termination microcontroller 4 of ON-OFF control circuit 3, the grid of the output termination second field effect transistor CS2 of ON-OFF control circuit 3, the drain electrode of the second field effect transistor CS2 connects the other end of electromagnet 5, source electrode ground connection after sampling resistor R of the second field effect transistor CS2, lead-out wire between the source electrode of the second field effect transistor CS2 and sampling resistor R connects the positive input that pwm control signal produces circuit 2.
Because electromagnet 5 can produce high pressure inverse electromotive force in the moment of power-off; this electromotive force can become very high because switching time shortens; superpose solenoid actuated supply voltage again; all act on the drain electrode of the first field effect transistor CS1; first field effect transistor CS1 is punctured; thus the drain electrode of described second field effect transistor CS2 also connects the positive pole of the first diode D1; the negative pole of this first diode D1 connects solenoid actuated power supply; for the inverse electromotive force at vent discharge magnet 5 two ends, play the effect of protection first field effect transistor CS1.
As shown in Figure 2, ON-OFF control circuit 3 specifically comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the first triode Q1, the second triode Q2 and the second diode D2.The one termination 3V voltage of described 8th resistance R8, one end of another termination first resistance R1, the other end of described first resistance R1 connects one end of the second resistance R2 and the base stage of the first triode Q1 respectively, the other end of described second resistance R2 and the equal ground connection of emitter of the first triode Q1, the collector electrode of described first triode Q1 connects one end of the 3rd resistance R3 respectively, one end of 4th resistance R4 and one end of the 5th resistance R5, another termination 15V voltage of described 3rd resistance R3, the other end of described 4th resistance R4 connects one end of the 6th resistance R6 and the base stage of the second triode Q2 respectively, the collector electrode of described second triode Q2 connects 15V voltage, the emitter of the second triode Q2 connects the other end of the 6th resistance R6 and one end of the 7th resistance R7 respectively, the positive pole of another termination second diode D2 of described 7th resistance R7, the negative pole of described second diode D2 connects the other end of the 5th resistance R5.Lead-out wire between described first resistance R1 and the 8th resistance R8 connects the level signal output of microcontroller, and the lead-out wire between described 7th resistance R7 and the second diode D2 connects the grid of the second field effect transistor CS2.
This ON-OFF control circuit 3 exports for the level signal exported according to microcontroller 4 grid controlling signal to the second field effect transistor CS2 accordingly, for controlling the break-make between the drain electrode of the second field effect transistor CS2 and source electrode, thus controls the break-make of electromagnet 4.
Its operation principle is:
When microcontroller 4 exports high level, first triode Q1 conducting, the voltage of its collector electrode is dragged down, the base stage of the second triode is caused to obtain low-voltage and end, the control signal of the second field effect transistor CS2 now drawn from the emitter of the second triode is low level, be cut-off state between the drain electrode of this second field effect transistor CS2 and source electrode, namely electromagnet 4 is closed.
When microcontroller 4 output low level, first triode Q1 ends, thus the base stage of the second triode obtains high voltage and conducting, the control signal of the second field effect transistor CS2 now drawn from the emitter of the second triode is high level, be conducting state between the drain electrode of this second field effect transistor CS2 and source electrode, i.e. electromagnet 4 conducting.
As shown in Figure 3, low-pass filtering amplifying circuit 1 specifically comprises the 9th resistance R9, the first electric capacity C1, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the first operational amplifier U1 and the second operational amplifier U2.The PWM reference signal output of the one termination microcontroller of described 9th resistance R9, the other end is ground connection after the first electric capacity C1.The positive input of described first operational amplifier U1 connects the lead-out wire between the 9th resistance R9 and the first electric capacity C1, and reverse input end is ground connection and connect its output after the 11 resistance R11 after the tenth resistance R10 respectively.The positive input of described second operational amplifier U2 connect respectively the first operational amplifier U1 output and after the 12 resistance R12 ground connection, reverse input end connects its output after the 13 resistance R13, and output is ground connection after the 14 resistance R14 and the 15 resistance R15 successively.Lead-out wire between described 14 resistance R14 and the 15 resistance R15 connects the reverse input end that pwm control signal produces circuit 2.
The PWM reference signal that microcontroller 4 exports by this low-pass filtering amplifying circuit 1 converts corresponding d. c. voltage signal to and amplifies by specific factor.
The second order passive filter circuit that the PWM reference signal that microcontroller 4 exports first forms via the 9th resistance R9 and the first electric capacity C1 becomes d. c. voltage signal, amplify through operational amplifier, the d. c. voltage signal after amplifying produces the reference voltage for making comparisons with sampled voltage in circuit 2 as pwm control signal below again.Within the specific limits, PWM reference signal duty ratio is larger, and the direct voltage of output is higher.
As shown in Figure 4, pwm control signal generation circuit 2 mainly comprises frequency fixing PWM chip, the 16 resistance R16, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the 20 resistance R20 and the second electric capacity C2.The in-phase signal end of the first error amplifier of described frequency fixing PWM chip connects the lead-out wire between the source electrode of the second field effect transistor CS2 and sampling resistor R after the 18 resistance R18, the output of the inversion signal termination low-pass filtering amplifying circuit 1 of the first error amplifier, compensating element, link connects the inversion signal end of the first error amplifier after the 17 resistance R17, the external oscillating capacitance link of oscillator ground connection after the second electric capacity C2, the external oscillation resistance link of oscillator ground connection after the 19 resistance R19, first push-pull circuit inversion signal output connect respectively the first field effect transistor CS1 grid and after the 20 resistance R20 ground connection, second push-pull circuit inversion signal output is unsettled, working power voltage input termination 24V operating voltage, reference power supply output connects the inversion signal end of the second error amplifier after the 16 resistance R16, all the other dead zone function signal input parts, first push-pull circuit in-phase signal output, second push-pull circuit in-phase signal output, the in-phase signal end all directly ground connection of way of output setting signal input and the second error amplifier.
Described pwm control signal produces circuit 2 pairs of low-pass filtering amplifying circuits 1 d. c. voltage signal exported and the sampled voltage be applied on sampling resistor R and compares in real time, and regulate pwm control signal to produce the pwm control signal of circuit 2 output according to both voltage differences, this pwm control signal is for controlling the output current of the drain electrode of the first field effect transistor CS1, thus regulate the electric current flowing through electromagnet, make sampled voltage remain equal with the d. c. voltage signal that low-pass filtering amplifying circuit 1 exports, realize the object of electromagnet constant current.
In the present invention, solenoid actuated power supply, the first field effect transistor CS1, electromagnet 5, second field effect transistor CS2 and sampling resistor R connect successively and form loop, therefore the electric current flowing through electromagnet 5 and sampling resistor R is equal, according to Ohm's law, when the resistance of sampling resistor R is constant, as long as the voltage be applied on sampling resistor R changes, then the electric current flowing through sampling resistor R also can correspondingly change, and the electric current namely flowing through electromagnet 5 also can correspondingly change.Therefore, when the d. c. voltage signal that low-pass filtering amplifying circuit 1 exports is constant, as long as ensure that the sampled voltage be applied on sampling resistor R is equal with this d. c. voltage signal, the object of electromagnet 5 constant current can be realized.
Therefore, when needing the pressure changing presser, only need change the duty ratio of the PWM reference signal that microcontroller 4 exports, the d. c. voltage signal of low-pass filtering amplifying circuit 1 output is changed with this, namely change and produce reference voltage for making comparisons with sampled voltage in circuit 2 as pwm control signal, and the effect of pwm control signal generation circuit 2 is output currents of the drain electrode by changing the first field effect transistor CS1, further sampled voltage is adjusted to equal with the direct voltage that low-pass filtering amplifying circuit 1 exports, thus change the electric current flowing through electromagnet 5, and finally reach the object of electromagnet 5 constant current.
Use the present invention, can real-time regulating magnet electric current as required easily, realize the adjustable flexibly of the pressure of presser.And by comparing the Real-time Collection of electromagnet current, make the electric current flowing through electromagnet can not change with the heating of electromagnet, keep the pressure stability of presser, and vibrate little, noise is little.
Claims (5)
1. a solenoid driver circuit for presser, is characterized in that, comprises low-pass filtering amplifying circuit, ON-OFF control circuit, pwm control signal generation circuit, the first field effect transistor, the second field effect transistor and sampling resistor;
The PWM reference signal output of the input termination microcontroller of described low-pass filtering amplifying circuit, the output termination pwm control signal of low-pass filtering amplifying circuit produces the reverse input end of circuit, pwm control signal produces the grid of output termination first field effect transistor of circuit, the drain electrode of the first field effect transistor connects solenoid actuated power supply, the source electrode of the first field effect transistor connects one end of electromagnet, the level signal output of the input termination microcontroller of ON-OFF control circuit, the grid of output termination second field effect transistor of ON-OFF control circuit, the drain electrode of the second field effect transistor connects the other end of electromagnet, source electrode ground connection after sampling resistor of the second field effect transistor, lead-out wire between the source electrode of the second field effect transistor and sampling resistor connects the positive input that pwm control signal produces circuit,
The level signal that described ON-OFF control circuit exports according to microcontroller exports the grid controlling signal to the second field effect transistor accordingly, for controlling the break-make between the drain electrode of the second field effect transistor and source electrode, thus controls the break-make of electromagnet;
The PWM reference signal that microcontroller exports by described low-pass filtering amplifying circuit converts corresponding d. c. voltage signal to and amplifies by specific factor;
Described pwm control signal produces circuit and compares in real time low-pass filtering the amplifying circuit d. c. voltage signal exported and the sampled voltage be applied on sampling resistor, and regulate pwm control signal to produce the pwm control signal of circuit output according to both voltage differences, this pwm control signal is for controlling the output current of the drain electrode of the first field effect transistor, thus regulate the electric current flowing through electromagnet, make sampled voltage equal the d. c. voltage signal of low-pass filtering amplifying circuit output, realize the object of electromagnet constant current.
2. the solenoid driver circuit of a kind of presser according to claim 1, is characterized in that, the drain electrode of described second field effect transistor also connects the positive pole of the first diode, and the negative pole of this first diode connects solenoid actuated power supply.
3. the solenoid driver circuit of a kind of presser according to claim 1, it is characterized in that, described ON-OFF control circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first triode, the second triode and the second diode;
One termination 3.3V voltage of described 8th resistance, one end of another termination first resistance, the other end of described first resistance connects one end of the second resistance and the base stage of the first triode respectively, the other end of described second resistance and the equal ground connection of emitter of the first triode, the collector electrode of described first triode connects one end of the 3rd resistance respectively, one end of 4th resistance and one end of the 5th resistance, another termination 15V voltage of described 3rd resistance, the other end of described 4th resistance connects one end of the 6th resistance and the base stage of the second triode respectively, the collector electrode of described second triode connects 15V voltage, the emitter of the second triode connects the other end of the 6th resistance and one end of the 7th resistance respectively, the positive pole of another termination second diode of described 7th resistance, the negative pole of described second diode connects the other end of the 5th resistance,
Lead-out wire between described first resistance and the 8th resistance connects the level signal output of microcontroller; Lead-out wire between described 7th resistance and the second diode connects the grid of the second field effect transistor.
4. the solenoid driver circuit of a kind of presser according to claim 1, it is characterized in that, described low-pass filtering amplifying circuit comprises the 9th resistance, the first electric capacity, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the first operational amplifier and the second operational amplifier;
The PWM reference signal output of one termination microcontroller of described 9th resistance, the other end is ground connection after the first electric capacity;
The positive input of described first operational amplifier connects the lead-out wire between the 9th resistance and the first electric capacity, and reverse input end is ground connection and connect its output after the 11 resistance after the tenth resistance respectively;
The positive input of described second operational amplifier connect respectively the first operational amplifier output and after the 12 resistance ground connection, reverse input end connects its output after the 13 resistance, and output is ground connection after the 14 resistance and the 15 resistance successively;
Lead-out wire between described 14 resistance and the 15 resistance connects the reverse input end that pwm control signal produces circuit.
5. the solenoid driver circuit of a kind of presser according to claim 1, it is characterized in that, described pwm control signal produces circuit and comprises frequency fixing PWM chip, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance and the second electric capacity;
The in-phase signal end of the first error amplifier of described frequency fixing PWM chip connects the lead-out wire between the source electrode of the second field effect transistor and sampling resistor after the 18 resistance, the output of the inversion signal termination low-pass filtering amplifying circuit of the first error amplifier, compensating element, link connects the inversion signal end of the first error amplifier after the 17 resistance, the external oscillating capacitance link of oscillator ground connection after the second electric capacity, the external oscillation resistance link of oscillator ground connection after the 19 resistance, first push-pull circuit inversion signal output connect respectively the first field effect transistor grid and after the 20 resistance ground connection, second push-pull circuit inversion signal output is unsettled, working power voltage input termination 24V operating voltage, reference power supply output connects the inversion signal end of the second error amplifier after the 16 resistance, all the other dead zone function signal input parts, first push-pull circuit in-phase signal output, second push-pull circuit in-phase signal output, the in-phase signal end all directly ground connection of way of output setting signal input and the second error amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410712245.7A CN104465015B (en) | 2014-11-28 | 2014-11-28 | A kind of solenoid driver circuit of presser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712245.7A CN104465015B (en) | 2014-11-28 | 2014-11-28 | A kind of solenoid driver circuit of presser |
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| CN104465015A true CN104465015A (en) | 2015-03-25 |
| CN104465015B CN104465015B (en) | 2016-06-22 |
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| CN201410712245.7A Expired - Fee Related CN104465015B (en) | 2014-11-28 | 2014-11-28 | A kind of solenoid driver circuit of presser |
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| CN108492682A (en) * | 2018-06-05 | 2018-09-04 | 深圳大学 | Reading aid for blindmen |
| CN109252297A (en) * | 2018-10-24 | 2019-01-22 | 浙江众邦机电科技有限公司 | The control mechanism and control method of lifting pressre of sewing machine |
| CN109546847A (en) * | 2019-01-16 | 2019-03-29 | 合肥惠科金扬科技有限公司 | Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply |
| CN110118949A (en) * | 2019-06-05 | 2019-08-13 | 中科新松有限公司 | A kind of electromagnet state detection circuit and detection method |
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- 2014-11-28 CN CN201410712245.7A patent/CN104465015B/en not_active Expired - Fee Related
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| CN108131487A (en) * | 2017-12-20 | 2018-06-08 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of electromagnetic valve switch control system of type multimode electromagnetic valve actuator |
| CN108131487B (en) * | 2017-12-20 | 2019-06-28 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of electromagnetic valve switch control system of type multimode electromagnetic valve actuator |
| CN108492682A (en) * | 2018-06-05 | 2018-09-04 | 深圳大学 | Reading aid for blindmen |
| CN109252297A (en) * | 2018-10-24 | 2019-01-22 | 浙江众邦机电科技有限公司 | The control mechanism and control method of lifting pressre of sewing machine |
| CN109546847A (en) * | 2019-01-16 | 2019-03-29 | 合肥惠科金扬科技有限公司 | Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply |
| CN110118949A (en) * | 2019-06-05 | 2019-08-13 | 中科新松有限公司 | A kind of electromagnet state detection circuit and detection method |
| CN110118949B (en) * | 2019-06-05 | 2024-04-12 | 中科新松有限公司 | Electromagnet state detection circuit and detection method |
| CN110563100A (en) * | 2019-10-15 | 2019-12-13 | 上海万森水处理有限公司 | Scale inhibition and scale removal device and method based on random pulse sequence alternating electromagnetic field |
| CN110563100B (en) * | 2019-10-15 | 2023-10-27 | 上海万森低碳科技有限公司 | Scale inhibition and removal device and method based on random pulse sequence alternating electromagnetic field |
| CN113533836A (en) * | 2020-04-15 | 2021-10-22 | 纬湃汽车电子(长春)有限公司 | Circuit for monitoring current of electromagnet, current monitoring method and vehicle |
| CN114421286A (en) * | 2022-03-29 | 2022-04-29 | 北京福乐云数据科技有限公司 | Active fog ion generating device and control method thereof |
| CN114421286B (en) * | 2022-03-29 | 2022-06-24 | 北京福乐云数据科技有限公司 | Active fog ion generating device and control method thereof |
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| CN104465015B (en) | 2016-06-22 |
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