CN204967241U - Plateau high -tension electricity motor protection circuit - Google Patents

Plateau high -tension electricity motor protection circuit Download PDF

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Publication number
CN204967241U
CN204967241U CN201420662699.3U CN201420662699U CN204967241U CN 204967241 U CN204967241 U CN 204967241U CN 201420662699 U CN201420662699 U CN 201420662699U CN 204967241 U CN204967241 U CN 204967241U
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China
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resistance
diode
electric capacity
amplifier
positive pole
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CN201420662699.3U
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Chinese (zh)
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刘玉福
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Honghe University
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Honghe University
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Abstract

The utility model discloses a plateau high -tension electricity motor protection circuit, which comprises a power circuit, current detection circuit and protection control circuit, power supply circuit includes first electric capacity, a second capacitor, the fuse, first resistance to third resistance, first diode to fourth diode, a zener diode and emitting diode, current detection circuit includes the 2nd current transformer to the 3rd current transformer, the 5th resistance to the 11 resistance, the 14 resistance to the 16 resistance, the 5th diode to the 7th diode, the 2nd zener diode is to fourth zener diode, third electric capacity to the 7th electric capacity summation potential ware, protection control circuit includes operational amplifier integrated circuit, the 12 resistance, the 13 resistance, the 8th diode to the tenth quad diode, the transistor, the normally open contact of the rela, an alternating current contactor, run button and stop button. The utility model discloses in the time of and transshipping in the motor loss of phase, in time cut off the working power supply of motor, prevent that the motor from burning out.

Description

Plateau high-pressure electricity motor protective circuit
Technical field
The utility model relates to voltage stabilizing circuit, particularly relates to a kind of plateau high-pressure electricity motor protective circuit.
Background technology
On plateau; because its height above sea level is higher, air pressure is low and oxygen content is less; so the operational environment of electric equipment and usual conventional environment have larger difference; relative to the equipment worked in normal circumstances; if the equipment on plateau more easily occurs when voltage instability aging or damages; more need to prevent motor because the working power of motor can be cut off when the situations such as overcurrent, overvoltage, zero load, short circuit appear in circuit in time, prevent motor from burning.
Utility model content
The purpose of this utility model is just to provide a kind of plateau high-pressure electricity motor protective circuit to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of plateau high-pressure electricity motor protective circuit, comprise power circuit, current detection circuit and protecting control circuit, described power circuit comprises the first electric capacity, second electric capacity, fuse, first resistance is to the 3rd resistance, first diode is to the 4th diode, first voltage stabilizing didoe and light-emitting diode, described current detection circuit comprises the second current transformer to the 3rd current transformer, 5th resistance is to the 11 resistance, 14 resistance is to the 16 resistance, 5th diode is to the 7th diode, second voltage stabilizing didoe is to the 4th voltage stabilizing didoe, 3rd electric capacity is to the 7th electric capacity and potentiometer, described protecting control circuit comprises operational amplifier integrated circuit, first D.C mutual-inductor, 4th resistance, 12 resistance, 13 resistance, 8th diode is to the 14 diode, transistor, relay, A.C. contactor, start button and stop button, described operational amplifier integrated circuit comprises the first amplifier to the 4th amplifier.
Particularly, working motor is connected with three-phase alternating current electrical cables, described second current transformer and described 3rd current transformer, described first D.C mutual-inductor, described second current transformer and described 3rd current transformer are separately positioned on three described three-phase alternating current electrical cables, the first end of described first resistance and the first end of described fuse are connected with wherein two described three-phase alternating current electrical cables respectively, the first end of described first resistance is connected with the first end of described first electric capacity, described first diode is to described 4th diode composition rectifier bridge stack, second end of described first resistance is connected with the second end of described first electric capacity and the first ac input end of described rectifier bridge stack respectively, second end of described fuse is connected with the second ac input end of described rectifier bridge stack, the negative input of described rectifier bridge stack is connected with the first end of described 3rd resistance, second end of described 3rd resistance respectively with the first end of described second resistance, the negative pole of described first voltage stabilizing didoe, the first end of described second electric capacity, the first end of described 13 resistance, the first end of described 4th resistance, the first end of described relay is connected with the first end of described 12 resistance, second end of described second resistance is connected with the positive pole of described light-emitting diode, the negative pole of described light-emitting diode is connected with the positive pole of described first voltage stabilizing didoe and the second end of described second electric capacity and ground connection respectively, described first D.C mutual-inductor with described 14 resistor coupled in parallel and its first end be connected with the positive pole of described 5th diode, second end ground connection of described first D.C mutual-inductor, the negative pole of described 5th diode is connected with the first end of described 5th resistance, second end of described 5th resistance respectively with the first end of described 3rd electric capacity, the negative pole of described second voltage stabilizing didoe, the first end of described 6th resistance is connected with the in-phase input end of described first amplifier, second end of described 3rd electric capacity is connected with the positive pole of described second voltage stabilizing didoe and the second end of described 6th resistance and ground connection respectively, described second current transformer with described 15 resistor coupled in parallel and its first end be connected with the positive pole of described 6th diode, the negative pole of described 6th diode is connected with the first end of described 7th resistance, second end of described 7th resistance respectively with the first end of described 4th electric capacity, the negative pole of described 3rd voltage stabilizing didoe, the first end of described 8th resistance is connected with the in-phase input end of described second amplifier, second end of described 4th electric capacity is connected with the negative pole of described 3rd voltage stabilizing didoe and the second end of described 8th resistance and ground connection respectively, described 3rd current transformer with described 16 resistor coupled in parallel and its first end be connected with the positive pole of described 7th diode, the negative pole of described 7th diode is connected with the first end of described 9th resistance and the first end of described 11 resistance respectively, second end of described 9th resistance respectively with the first end of described 5th electric capacity, the negative pole of described 4th voltage stabilizing didoe, the first end of described tenth resistance is connected with the in-phase input end of described 3rd amplifier, second end of described 5th electric capacity is connected with the positive pole of described 4th voltage stabilizing didoe and the second end of described tenth resistance and ground connection respectively, second end of described 11 resistance is connected with the described first end of the 7th electric capacity and the first end of described potentiometer respectively, second end of described 7th electric capacity respectively with the second end of described potentiometer, the first end of described 6th electric capacity is connected with the first end of described 12 resistance and ground connection, the sliding end of described potentiometer is connected with the second end of described 6th electric capacity and the inverting input of described 4th amplifier respectively, second end of described 12 resistance respectively with the second end of described 13 resistance, the inverting input of described first amplifier, the inverting input of described second amplifier is connected with the inverting input of described 3rd amplifier, the output of described first amplifier is connected with the negative pole of described 8th diode, the output of described second amplifier is connected with the negative pole of described 9th diode, the output of described 3rd amplifier is connected with the negative pole of described tenth diode, the output of described 4th amplifier is connected with the negative pole of described 11 diode, second end of described 4th resistance respectively with the positive pole of described 8th diode, the positive pole of described 9th diode, the positive pole of described tenth diode, the positive pole of described 11 diode is connected with the base stage of described transistor, the collector electrode of described transistor is connected with the second end of described relay and the positive pole of described 12 diode respectively, the emitter of described transistor is connected with the positive pole of described 13 diode, the negative pole of described 13 diode is connected with the positive pole of described 14 diode, the minus earth of described 14 diode, the first end of described A.C. contactor is connected with a wherein three-phase alternating current electrical cables, second end of described A.C. contactor is connected with the first end of described stop button, second end of described stop button is connected with the first end of the first end of described start button and the contact switch of described relay respectively, second end of the contact switch of described relay and the second end of described start button and wherein another root three-phase alternating current electrical cables are connected.
The beneficial effects of the utility model are:
The utility model plateau high-pressure electricity motor protective circuit when Electric Motor Open-phase Situation and overload, can cut off in time the working power of motor, prevents motor from burning, this protective circuit has that antijamming capability is strong, reliable working performance, from features such as power consumption are low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model plateau high-pressure electricity motor protective circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model plateau high-pressure electricity motor protective circuit, comprises power circuit 1, current detection circuit 2 and protecting control circuit 3, power circuit 1 comprises the first electric capacity C1, second electric capacity C2, fuse FU, first resistance R1 is to the 3rd resistance R3, first diode VD1 is to the 4th diode VD4, first voltage stabilizing didoe VS1 and light-emitting diode VL, current detection circuit 2 comprises the second current transformer TA1 to the 3rd current transformer TA3, 5th resistance R5 is to the 11 resistance R11, 14 resistance R14 is to the 16 resistance R16, 5th diode VD5 is to the 7th diode VD7, second voltage stabilizing didoe VS2 is to the 4th voltage stabilizing didoe VS4, 3rd electric capacity C3 is to the 7th electric capacity C7 and potentiometer RP, and protecting control circuit 3 comprises operational amplifier integrated circuit (IC), 12 resistance R12, 13 resistance R13, 8th diode VD8 is to the 14 diode VD14, transistor V, relay K, A.C. contactor KM, start button S1 and stop button S2, operational amplifier integrated circuit (IC) comprises the first amplifier N1 to the 4th amplifier N4.
Working motor M is connected with three-phase alternating current electrical cables, second current transformer TA2 and the 3rd current transformer TA3, first D.C mutual-inductor TA1, second current transformer TA2 and the 3rd current transformer TA3 is separately positioned on three three-phase alternating current electrical cables, the first end of the first resistance R1 and the first end of fuse FU are connected with wherein two three-phase alternating current electrical cables respectively, the first end of the first resistance R1 is connected with the first end of the first electric capacity C1, first diode VD1 forms rectifier bridge stack to the 4th diode VD4, second end of the first resistance R1 is connected with second end of the first electric capacity C1 and the first ac input end of rectifier bridge stack respectively, second end of fuse FU is connected with the second ac input end of rectifier bridge stack, the negative input of rectifier bridge stack is connected with the first end of the 3rd resistance R3, second end of the 3rd resistance R3 respectively with the first end of the second resistance R2, the negative pole of the first voltage stabilizing didoe VS1, the first end of the second electric capacity C2, the first end of the 13 resistance R13, the first end of the 4th resistance R4, the first end of relay K is connected with the first end of the 12 resistance R12, second end of the second resistance R2 is connected with the positive pole of light-emitting diode VL, the negative pole of light-emitting diode VL is connected with the positive pole of the first voltage stabilizing didoe VS1 and second end of the second electric capacity C2 and ground connection respectively, first D.C mutual-inductor TA1 and its first end in parallel with the 14 resistance R14 is connected with the positive pole of the 5th diode VD5, the second end ground connection of the first D.C mutual-inductor TA1, the negative pole of the 5th diode VD5 is connected with the first end of the 5th resistance R5, second end of the 5th resistance R5 respectively with the first end of the 3rd electric capacity C3, the negative pole of the second voltage stabilizing didoe VS2, the first end of the 6th resistance R6 is connected with the in-phase input end of the first amplifier N1, second end of the 3rd electric capacity C3 is connected with the positive pole of the second voltage stabilizing didoe VS2 and second end of the 6th resistance R6 and ground connection respectively, second current transformer TA2 and its first end in parallel with the 15 resistance R15 is connected with the positive pole of the 6th diode VD6, the negative pole of the 6th diode VD6 is connected with the first end of the 7th resistance R7, second end of the 7th resistance R7 respectively with the first end of the 4th electric capacity C4, the negative pole of the 3rd voltage stabilizing didoe VS3, the first end of the 8th resistance R8 is connected with the in-phase input end of the second amplifier N2, second end of the 4th electric capacity C4 is connected with the negative pole of the 3rd voltage stabilizing didoe VS3 and second end of the 8th resistance R8 and ground connection respectively, 3rd current transformer TA3 and its first end in parallel with the 16 resistance R16 is connected with the positive pole of the 7th diode VD7, the negative pole of the 7th diode VD7 is connected with the first end of the 9th resistance R9 and the first end of the 11 resistance R11 respectively, second end of the 9th resistance R9 respectively with the first end of the 5th electric capacity C5, the negative pole of the 4th voltage stabilizing didoe VS4, the first end of the tenth resistance R10 is connected with the in-phase input end of the 3rd amplifier N3, second end of the 5th electric capacity C5 is connected with the positive pole of the 4th voltage stabilizing didoe VS4 and second end of the tenth resistance R10 and ground connection respectively, second end of the 11 resistance R11 is connected with the first end of the 7th electric capacity C7 and the first end of potentiometer RP respectively, second end of the 7th electric capacity C7 respectively with second end of potentiometer RP, the first end of the 6th electric capacity C6 is connected with the first end of the 12 resistance R12 and ground connection, the sliding end of potentiometer RP is connected with second end of the 6th electric capacity C6 and the inverting input of the 4th amplifier N4 respectively, second end of the 12 resistance R12 respectively with second end of the 13 resistance R13, the inverting input of the first amplifier N1, the inverting input of the second amplifier N2 is connected with the inverting input of the 3rd amplifier N3, the output of the first amplifier N1 is connected with the negative pole of the 8th diode VD8, the output of the second amplifier N2 is connected with the negative pole of the 9th diode VD9, the output of the 3rd amplifier N3 is connected with the negative pole of the tenth diode VD10, the output of the 4th amplifier N4 is connected with the negative pole of the 11 diode VD11, second end of the 4th resistance R4 respectively with the positive pole of the 8th diode VD8, the positive pole of the 9th diode VD9, the positive pole of the tenth diode VD10, the positive pole of the 11 diode VD11 is connected with the base stage of transistor V, the collector electrode of transistor V is connected with the second end of relay K and the positive pole of the 12 diode VD12 respectively, the emitter of transistor V is connected with the positive pole of the 13 diode VD13, the negative pole of the 13 diode VD13 is connected with the positive pole of the 14 diode VD14, the minus earth of the 14 diode VD14, the first end of A.C. contactor KM is connected with a wherein three-phase alternating current electrical cables, second end of A.C. contactor KM is connected with the first end of stop button S2, second end of stop button S2 is connected with the first end of the first end of start button and the contact switch K-1 of relay K respectively, second end of the contact switch K-1 of relay K and the second end of start button and wherein another root three-phase alternating current electrical cables are connected.
The operation principle of the utility model plateau high-pressure electricity motor protective circuit is as follows:
After pressing start button S1, A.C. contactor KM is energized adhesive, and its 3 groups of normally open contacts are connected, motor M starting operation.
Alternating voltage, after the first electric capacity C1 step-down, rectifier bridge stack rectification, the 3rd are with you to organize current limliting, the first voltage stabilizing didoe VS1 voltage stabilizing and the second electric capacity C2 filtering, produces+12V voltage, supply protecting control circuit 3.Light-emitting diode VL is lighted simultaneously.
+ 12V voltage after the 13 resistance R13 and the 12 resistance R12 dividing potential drop, for the anti-phase input end of the first amplifier N1 to the 3rd amplifier N3 and the positive input end of the 4th amplifier N4 provide reference voltage.
First D.C mutual-inductor TA1 to the 3rd current transformer TA3 is used for detecting the operating current of motor M three phase mains inlet wire respectively, and produces 3 detectable voltage signals on the 14 resistance R14 to the 16 resistance R16.These 3 detectable voltage signals become direct voltage to the 7th diode VD7 rectification, the 3rd electric capacity C3 through the 5th diode VD5 respectively to the 5th electric capacity C5 filtering, be added in respectively on the positive input end of the first amplifier N1 to the 3rd amplifier N3, compare with the reference voltage of inverting input.
When motor M normally works, the normal phase input end voltage of the first amplifier N1 to the 3rd amplifier N3 is higher than reference voltage, the anti-phase input terminal voltage of the 4th amplifier N4 is lower than reference voltage, first amplifier N1 all exports high level to the 4th amplifier N4,8th diode VD8 all ends to the 11 diode VD11, transistor V and the 13 diode VD13, the 14 diode VD14 conducting, make relay K adhesive, its normally open contact is connected, and ensures that start button unclamps rear A.C. contactor KM and still can maintain energising adhesive.
If cause arbitrary disconnected phase time mutually in three phase mains for a certain reason; then this phase detectable voltage signals disappears; this road amplifier is by output low level; make the diode current flow that its output is external, triode ends, and relay K discharges; the normally open contact of relay K disconnects; A.C. contactor KM is discharged, and the working power of motor M is cut off by three groups of normally open contacts of A.C. contactor KM, thus protection motor M can not damage because of disconnected phase.
When there is overload in motor M; 4th amplifier N4 anti-phase input terminal voltage will higher than reference voltage; 4th amplifier N4 output low level; make the 11 diode VD11 conducting; triode ends; relay K and D.C mutual-inductor release, cut off the working power of motor M, thus protection motor M can not damage because of overload.
Components and parts are selected:
R1 and R4 all selects 1/2W metal film resistor, R3 selects 1W metal film resistor, R2, R5 ~ R16 selects 1/4W carbon film resistor or metal film resistor, RP selects organic solid variable resistance, C1 selects withstand voltage to be the CBB capacitor of 630V, C2 selects withstand voltage to be the aluminium electrolytic capacitor of 25V, C3 ~ C6 all selects monolithic capacitor, C7 selects withstand voltage to be the aluminium electrolytic capacitor of 16V, VD1 ~ VD14 all selects 1N4007 type silicon rectifier diode, VS1 selects 1W, the silicon voltage regulator diode of 12V, VS2 ~ VS4 all selects 1/2W, the silicon voltage regulator diode of 10V, V selects 59013 or 58050 type silicon NPN transistor V, IC selects LM324 type four operation amplifier integrated circuit, K selects JZC-21F type 12V direct current relay K.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical solution of the utility model, all falls within protection range of the present utility model.

Claims (1)

1. a plateau high-pressure electricity motor protective circuit, it is characterized in that: comprise power circuit, current detection circuit and protecting control circuit, described power circuit comprises the first electric capacity, second electric capacity, fuse, first resistance is to the 3rd resistance, first diode is to the 4th diode, first voltage stabilizing didoe and light-emitting diode, described current detection circuit comprises the second current transformer to the 3rd current transformer, 5th resistance is to the 11 resistance, 14 resistance is to the 16 resistance, 5th diode is to the 7th diode, second voltage stabilizing didoe is to the 4th voltage stabilizing didoe, 3rd electric capacity is to the 7th electric capacity and potentiometer, described protecting control circuit comprises operational amplifier integrated circuit, first D.C mutual-inductor, 4th resistance, 12 resistance, 13 resistance, 8th diode is to the 14 diode, transistor, relay, A.C. contactor, start button and stop button, described operational amplifier integrated circuit comprises the first amplifier to the 4th amplifier, working motor is connected with three-phase alternating current electrical cables, described second current transformer and described 3rd current transformer, described first D.C mutual-inductor, described second current transformer and described 3rd current transformer are separately positioned on three described three-phase alternating current electrical cables, the first end of described first resistance and the first end of described fuse are connected with wherein two described three-phase alternating current electrical cables respectively, the first end of described first resistance is connected with the first end of described first electric capacity, described first diode is to described 4th diode composition rectifier bridge stack, second end of described first resistance is connected with the second end of described first electric capacity and the first ac input end of described rectifier bridge stack respectively, second end of described fuse is connected with the second ac input end of described rectifier bridge stack, the negative input of described rectifier bridge stack is connected with the first end of described 3rd resistance, second end of described 3rd resistance respectively with the first end of described second resistance, the negative pole of described first voltage stabilizing didoe, the first end of described second electric capacity, the first end of described 13 resistance, the first end of described 4th resistance, the first end of described relay is connected with the first end of described 12 resistance, second end of described second resistance is connected with the positive pole of described light-emitting diode, the negative pole of described light-emitting diode is connected with the positive pole of described first voltage stabilizing didoe and the second end of described second electric capacity and ground connection respectively, described first D.C mutual-inductor with described 14 resistor coupled in parallel and its first end be connected with the positive pole of described 5th diode, second end ground connection of described first D.C mutual-inductor, the negative pole of described 5th diode is connected with the first end of described 5th resistance, second end of described 5th resistance respectively with the first end of described 3rd electric capacity, the negative pole of described second voltage stabilizing didoe, the first end of described 6th resistance is connected with the in-phase input end of described first amplifier, second end of described 3rd electric capacity is connected with the positive pole of described second voltage stabilizing didoe and the second end of described 6th resistance and ground connection respectively, described second current transformer with described 15 resistor coupled in parallel and its first end be connected with the positive pole of described 6th diode, the negative pole of described 6th diode is connected with the first end of described 7th resistance, second end of described 7th resistance respectively with the first end of described 4th electric capacity, the negative pole of described 3rd voltage stabilizing didoe, the first end of described 8th resistance is connected with the in-phase input end of described second amplifier, second end of described 4th electric capacity is connected with the negative pole of described 3rd voltage stabilizing didoe and the second end of described 8th resistance and ground connection respectively, described 3rd current transformer with described 16 resistor coupled in parallel and its first end be connected with the positive pole of described 7th diode, the negative pole of described 7th diode is connected with the first end of described 9th resistance and the first end of described 11 resistance respectively, second end of described 9th resistance respectively with the first end of described 5th electric capacity, the negative pole of described 4th voltage stabilizing didoe, the first end of described tenth resistance is connected with the in-phase input end of described 3rd amplifier, second end of described 5th electric capacity is connected with the positive pole of described 4th voltage stabilizing didoe and the second end of described tenth resistance and ground connection respectively, second end of described 11 resistance is connected with the described first end of the 7th electric capacity and the first end of described potentiometer respectively, second end of described 7th electric capacity respectively with the second end of described potentiometer, the first end of described 6th electric capacity is connected with the first end of described 12 resistance and ground connection, the sliding end of described potentiometer is connected with the second end of described 6th electric capacity and the inverting input of described 4th amplifier respectively, second end of described 12 resistance respectively with the second end of described 13 resistance, the inverting input of described first amplifier, the inverting input of described second amplifier is connected with the inverting input of described 3rd amplifier, the output of described first amplifier is connected with the negative pole of described 8th diode, the output of described second amplifier is connected with the negative pole of described 9th diode, the output of described 3rd amplifier is connected with the negative pole of described tenth diode, the output of described 4th amplifier is connected with the negative pole of described 11 diode, second end of described 4th resistance respectively with the positive pole of described 8th diode, the positive pole of described 9th diode, the positive pole of described tenth diode, the positive pole of described 11 diode is connected with the base stage of described transistor, the collector electrode of described transistor is connected with the second end of described relay and the positive pole of described 12 diode respectively, the emitter of described transistor is connected with the positive pole of described 13 diode, the negative pole of described 13 diode is connected with the positive pole of described 14 diode, the minus earth of described 14 diode, the first end of described A.C. contactor is connected with a wherein three-phase alternating current electrical cables, second end of described A.C. contactor is connected with the first end of described stop button, second end of described stop button is connected with the first end of the first end of described start button and the contact switch of described relay respectively, second end of the contact switch of described relay and the second end of described start button and wherein another root three-phase alternating current electrical cables are connected.
CN201420662699.3U 2014-11-06 2014-11-06 Plateau high -tension electricity motor protection circuit Expired - Fee Related CN204967241U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420662699.3U CN204967241U (en) 2014-11-06 2014-11-06 Plateau high -tension electricity motor protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420662699.3U CN204967241U (en) 2014-11-06 2014-11-06 Plateau high -tension electricity motor protection circuit

Publications (1)

Publication Number Publication Date
CN204967241U true CN204967241U (en) 2016-01-13

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Application Number Title Priority Date Filing Date
CN201420662699.3U Expired - Fee Related CN204967241U (en) 2014-11-06 2014-11-06 Plateau high -tension electricity motor protection circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116799748A (en) * 2023-08-28 2023-09-22 山西创芯光电科技有限公司 Automatic protection circuit for night vision full-color illuminance of image intensifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116799748A (en) * 2023-08-28 2023-09-22 山西创芯光电科技有限公司 Automatic protection circuit for night vision full-color illuminance of image intensifier
CN116799748B (en) * 2023-08-28 2023-11-14 山西创芯光电科技有限公司 Automatic protection circuit for night vision full-color illuminance of image intensifier

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Granted publication date: 20160113

Termination date: 20161106