CN104133153A - Short circuit detection circuit for elevator motor - Google Patents
Short circuit detection circuit for elevator motor Download PDFInfo
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- CN104133153A CN104133153A CN201410408672.6A CN201410408672A CN104133153A CN 104133153 A CN104133153 A CN 104133153A CN 201410408672 A CN201410408672 A CN 201410408672A CN 104133153 A CN104133153 A CN 104133153A
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- triode
- resistance
- transformer
- potentiometer
- transtat
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Abstract
The invention discloses a short circuit detection circuit of an elevator motor. The detection circuit comprises a power supply, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first potentiometer, a second potentiometer, a third potentiometer, a first transformer, a second transformer, a first adjustable transformer, a second adjustable transformer, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first switch, a second switch, a third switch, a loudspeaker and an ampere meter. The first triode, the second transformer, the first capacitor, the first potentiometer and the second resistor form a transformer feedback oscillation circuit, sound signals are generated, and whether a short circuit is caused on the motor or not can be judged by judging whether the loudspeaker produces a sound or not. The fourth capacitor and the seventh resistor form a positive feedback circuit which is used for feeding back weak sound signals induced in a first primary coil of the first transformer and a second primary coil of the first transformer to the base electrode of the second triode in a voltage feedback mode to be amplified, so that the detection circuit has the advantages of being high in detection sensitivity and stable in working.
Description
Technical field
The present invention relates to a kind of short-circuit test circuit, relate in particular to a kind of short-circuit detecting circuit for elevator motor.
Background technology
Elevator is the vertical conveyor taking motor as power, case shape gondola is housed, take advantage of people or carrying goods for tier building, motor is the power resources of elevator, so it must be treated among in heavy in daily repair and maintenance work, if the motor short circuit of elevator will cause elevator cisco unity malfunction, even cause the loss of people's life or property, therefore the motor of elevator is all provided with circuit measuring circuit, to find in time and solve the problem of motor short circuit, tradition exists detection sensitivity low for the short circuit metering circuit of elevator motor, the problem that job insecurity and cost are high.
Summary of the invention
Object of the present invention is just to provide in order to address the above problem a kind of short-circuit detecting circuit for elevator motor.
In order to achieve the above object, the present invention has adopted following technical scheme:
A kind of short-circuit detecting circuit for elevator motor, comprise power supply, the first resistance to the ten resistance, the first potentiometer to the three potentiometers, the first transformer, the second transformer, the first transtat, the second transtat, the first triode to the five triodes, the first electric capacity to the four electric capacity, the first switch to the three switches, loudspeaker and reometer, the positive pole of described power supply respectively with the first end of described the second resistance, the first end of described the 3rd resistance, the first end of described the 4th resistance, the first end of described the 5th resistance, the first end of described the 6th resistance, the collector of described the 3rd triode, the emitter of described the 4th triode, the first end of described the 9th resistance is connected with the first end of described the 8th resistance, the negative pole of described power supply is connected with the first end of described second switch, the second end of described second switch respectively with the first end of described reometer, the first end of described the 3rd switch, the first end of described the tenth resistance, the first end of the primary coil of described the second transtat, the first end of described the 3rd potentiometer, the first end of the first primary coil of described the first transformer, the first end of described the second potentiometer, the sliding end of described the second potentiometer, the first end of described the first electric capacity, the first end of the primary coil of described the second transformer is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the first potentiometer and the sliding end of described the first potentiometer respectively, the second end of described the first potentiometer is connected with the first end of the second end of described the second resistance and the secondary coil of described the second transformer respectively, the second end of the secondary coil of described the second transformer is connected with the base stage of described the first triode, the emitter of described the first triode is connected with the second end of described the 3rd resistance, the collector of described the first triode respectively with the second end of the primary coil of described the second transformer, the second end of described the first electric capacity, the first end of described the second electric capacity is connected with the first end of described the 7th resistance, the second end of described the second potentiometer respectively with the second end of described the second electric capacity, the second end of described the 4th resistance is connected with the base stage of described the second triode, the emitter of described the second triode is connected with the second end of described the 5th resistance, the collector of described the second triode is connected with the second end of the first primary coil of described the first transformer, the first end of the second primary coil of described the first transformer is connected with the first end of described the 3rd electric capacity and the first end of described the 4th electric capacity respectively, the second end of described the 3rd electric capacity respectively with the second end of described the 6th resistance, the base stage of described the 5th triode, the second end of the second primary coil of described the first transformer, the second end of described the 3rd potentiometer is connected with the sliding end of described the 3rd potentiometer, the second end of described the 4th electric capacity is connected with the second end of described the 7th resistance, the first end of the secondary coil of described the first transformer is connected with the first end of described the first switch, the second end of described the first switch is connected with the second end of the secondary coil of described the first transformer, the second end of described the 8th resistance is connected with the emitter of described the 5th triode, the collector of described the 5th triode is connected with the second end of the primary coil of described the second transtat, the first end of the secondary coil of described the second transtat is connected with the base stage of described the 3rd triode, the adjustable end of described the second transtat is connected with the second end of described the 9th resistance and the second end of described the tenth resistance respectively, the second end of the secondary coil of described the second transtat is connected with the base stage of described the 4th triode, the emitter of described the 3rd triode is connected with the first end of the primary coil of described the first transtat, the adjustable end of described the first transtat is connected with the second end of described reometer and the second end of described the 3rd switch respectively, the second end of the primary coil of described the first transtat is connected with the collector of described the 4th triode, the first end of the secondary coil of described the first transtat is connected with the first end of described loudspeaker, the second end of the secondary coil of described the first transtat is connected with the second end of described loudspeaker.
Beneficial effect of the present invention is:
The present invention is a kind of short-circuit detecting circuit for elevator motor, the 4th electric capacity and the 7th resistance composition positive-feedback circuit in this testing circuit, its effect is that the base stage that the weak audio signal voltage sensing in the second primary coil of the first primary coil of the first transformer and the first transformer is fed back to the second triode is amplified again, positive-feedback circuit can sense faint sound signal, therefore this testing circuit has the feature of detection sensitivity height and working stability, this testing circuit also has the feature that cost is low.
Brief description of the drawings
Fig. 1 is the circuit diagram of a kind of short-circuit detecting circuit for elevator motor of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of short-circuit detecting circuit for elevator motor of the present invention, comprise power supply E, the first resistance R 1 is to the tenth resistance R 10, the first potentiometer RP1 to the three potentiometer RP3, the first transformer T1, the second transformer T2, the first transtat TP1, the second transtat TP2, the first triode VT1 to the five triode VT5, the first capacitor C 1 is to the 4th capacitor C 4, the first switch S 1 is to the 3rd switch S 3, loudspeaker BL and reometer A, the positive pole of power supply E respectively with the first end of the second resistance R 2, the first end of the 3rd resistance R 3, the first end of the 4th resistance R 4, the first end of the 5th resistance R 5, the first end of the 6th resistance R 6, the collector of the 3rd triode VT3, the emitter of the 4th triode VT4, the first end of the 9th resistance R 9 is connected with the first end of the 8th resistance R 8, the negative pole of power supply E is connected with the first end of second switch S2, the second end of second switch S2 respectively with the first end of reometer A, the first end of the 3rd switch S 3, the first end of the tenth resistance R 10, the first end of the primary coil of the second transtat TP2, the first end of the 3rd potentiometer RP3, the first end of the first primary coil of the first transformer T1, the first end of the second potentiometer RP2, the sliding end of the second potentiometer RP2, the first end of the first capacitor C 1, the first end of the primary coil of the second transformer T2 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 is connected with the first end of the first potentiometer RP1 and the sliding end of the first potentiometer RP1 respectively, the second end of the first potentiometer RP1 is connected with the first end of the second end of the second resistance R 2 and the secondary coil of the second transformer T2 respectively, the second end of the secondary coil of the second transformer T2 is connected with the base stage of the first triode VT1, the emitter of the first triode VT1 is connected with the second end of the 3rd resistance R 3, the collector of the first triode VT1 respectively with the second end of the primary coil of the second transformer T2, the second end of the first capacitor C 1, the first end of the second capacitor C 2 is connected with the first end of the 7th resistance R 7, the second end of the second potentiometer RP2 respectively with the second end of the second capacitor C 2, the second end of the 4th resistance R 4 is connected with the base stage of the second triode VT2, the emitter of the second triode VT2 is connected with the second end of the 5th resistance R 5, the collector of the second triode VT2 is connected with the second end of the first primary coil of the first transformer T1, the first end of the second primary coil of the first transformer T1 is connected with the first end of the 3rd capacitor C 3 and the first end of the 4th capacitor C 4 respectively, the second end of the 3rd capacitor C 3 respectively with the second end of the 6th resistance R 6, the base stage of the 5th triode VT5, the second end of the second primary coil of the first transformer T1, the second end of the 3rd potentiometer RP3 is connected with the sliding end of the 3rd potentiometer RP3, the second end of the 4th capacitor C 4 is connected with the second end of the 7th resistance R 7, the first end of the secondary coil of the first transformer T1 is connected with the first end of the first switch S 1, the second end of the first switch S 1 is connected with the second end of the secondary coil of the first transformer T1, the second end of the 8th resistance R 8 is connected with the emitter of the 5th triode VT5, the collector of the 5th triode VT5 is connected with the second end of the primary coil of the second transtat TP2, the first end of the secondary coil of the second transtat TP2 is connected with the base stage of the 3rd triode VT3, the adjustable end of the second transtat TP2 is connected with the second end of the 9th resistance R 9 and the second end of the tenth resistance R 10 respectively, the second end of the secondary coil of the second transtat TP2 is connected with the base stage of the 4th triode VT4, the emitter of the 3rd triode VT3 is connected with the first end of the primary coil of the first transtat TP1, the adjustable end of the first transtat TP1 is connected with the second end of reometer A and the second end of the 3rd switch S 3 respectively, the second end of the primary coil of the first transtat TP1 is connected with the collector of the 4th triode VT4, the first end of the secondary coil of the first transtat TP1 is connected with the first end of loudspeaker BL, the second end of the secondary coil of the first transtat TP1 is connected with the second end of loudspeaker BL.
Principle of work of the present invention is as follows:
The first triode VT1, the second transformer T2, the first capacitor C 1, the first potentiometer RP1 and the second resistance R 2 form transformer feedback oscillatory circuit, produce sound signal, then being coupled to the second triode VT2 through the second capacitor C 2 amplifies, sound signal after amplification is exported from the second triode VT2 collector, the first transformer T1 is for detecting transformer, tone currents will flow through the first primary coil that detects transformer, in the time detecting transformer core contact measured electric machine iron core, the main magnetic circuit that detects transformer forms path through electric machine iron core to be measured, if embedded not short circuit of coil winding in electric machine iron core wire casing to be measured, will produce sound signal induced voltage at the second primary coil two ends of detecting transformer, and deliver to the 5th triode VT5 and carry out voltage amplification, signal voltage after amplification is delivered to through the second transtat TP2 the push-pull power amplifier circuit being made up of the 3rd triode VT3 and the 4th triode VT4 and is carried out power amplification, signal voltage after amplification is coupled to loudspeaker BL sounding by the first transtat TP1 again or is constantly changed and indicate by a pointer position a kind of net used for fishing for reometer, if there is turn-to-turn short circuit in coil winding embedded in electric machine iron core wire casing to be measured, the inductance value that detects transformer will decline to a great extent, the second primary coil two ends of detecting transformer will not produce sound signal induced voltage, so loudspeaker BL will stop sounding.
Claims (1)
1. the short-circuit detecting circuit for elevator motor, it is characterized in that: comprise power supply, the first resistance to the ten resistance, the first potentiometer to the three potentiometers, the first transformer, the second transformer, the first transtat, the second transtat, the first triode to the five triodes, the first electric capacity to the four electric capacity, the first switch to the three switches, loudspeaker and reometer, the positive pole of described power supply respectively with the first end of described the second resistance, the first end of described the 3rd resistance, the first end of described the 4th resistance, the first end of described the 5th resistance, the first end of described the 6th resistance, the collector of described the 3rd triode, the emitter of described the 4th triode, the first end of described the 9th resistance is connected with the first end of described the 8th resistance, the negative pole of described power supply is connected with the first end of described second switch, the second end of described second switch respectively with the first end of described reometer, the first end of described the 3rd switch, the first end of described the tenth resistance, the first end of the primary coil of described the second transtat, the first end of described the 3rd potentiometer, the first end of the first primary coil of described the first transformer, the first end of described the second potentiometer, the sliding end of described the second potentiometer, the first end of described the first electric capacity, the first end of the primary coil of described the second transformer is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the first potentiometer and the sliding end of described the first potentiometer respectively, the second end of described the first potentiometer is connected with the first end of the second end of described the second resistance and the secondary coil of described the second transformer respectively, the second end of the secondary coil of described the second transformer is connected with the base stage of described the first triode, the emitter of described the first triode is connected with the second end of described the 3rd resistance, the collector of described the first triode respectively with the second end of the primary coil of described the second transformer, the second end of described the first electric capacity, the first end of described the second electric capacity is connected with the first end of described the 7th resistance, the second end of described the second potentiometer respectively with the second end of described the second electric capacity, the second end of described the 4th resistance is connected with the base stage of described the second triode, the emitter of described the second triode is connected with the second end of described the 5th resistance, the collector of described the second triode is connected with the second end of the first primary coil of described the first transformer, the first end of the second primary coil of described the first transformer is connected with the first end of described the 3rd electric capacity and the first end of described the 4th electric capacity respectively, the second end of described the 3rd electric capacity respectively with the second end of described the 6th resistance, the base stage of described the 5th triode, the second end of the second primary coil of described the first transformer, the second end of described the 3rd potentiometer is connected with the sliding end of described the 3rd potentiometer, the second end of described the 4th electric capacity is connected with the second end of described the 7th resistance, the first end of the secondary coil of described the first transformer is connected with the first end of described the first switch, the second end of described the first switch is connected with the second end of the secondary coil of described the first transformer, the second end of described the 8th resistance is connected with the emitter of described the 5th triode, the collector of described the 5th triode is connected with the second end of the primary coil of described the second transtat, the first end of the secondary coil of described the second transtat is connected with the base stage of described the 3rd triode, the adjustable end of described the second transtat is connected with the second end of described the 9th resistance and the second end of described the tenth resistance respectively, the second end of the secondary coil of described the second transtat is connected with the base stage of described the 4th triode, the emitter of described the 3rd triode is connected with the first end of the primary coil of described the first transtat, the adjustable end of described the first transtat is connected with the second end of described reometer and the second end of described the 3rd switch respectively, the second end of the primary coil of described the first transtat is connected with the collector of described the 4th triode, the first end of the secondary coil of described the first transtat is connected with the first end of described loudspeaker, the second end of the secondary coil of described the first transtat is connected with the second end of described loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408672.6A CN104133153A (en) | 2014-08-19 | 2014-08-19 | Short circuit detection circuit for elevator motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408672.6A CN104133153A (en) | 2014-08-19 | 2014-08-19 | Short circuit detection circuit for elevator motor |
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| Publication Number | Publication Date |
|---|---|
| CN104133153A true CN104133153A (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410408672.6A Pending CN104133153A (en) | 2014-08-19 | 2014-08-19 | Short circuit detection circuit for elevator motor |
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| CN (1) | CN104133153A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970901A (en) * | 1973-12-14 | 1976-07-20 | Societe Anonyme Des Ateliers De Secheron | Method and apparatus for the detection of short circuits |
| CN1207361A (en) * | 1997-08-05 | 1999-02-10 | 北京市畅达贸易发展公司 | Automatic help safety device for elevator |
| EP2159868A1 (en) * | 2007-06-11 | 2010-03-03 | Panasonic Corporation | In-cell shortcircuit detection device and method and cell pack |
| CN201530653U (en) * | 2009-10-27 | 2010-07-21 | 马力 | Elevator electrical energy feedback device |
| CN104714140A (en) * | 2013-12-14 | 2015-06-17 | 天津市飞美通电梯有限公司 | Short circuit detection circuit for elevator motor |
-
2014
- 2014-08-19 CN CN201410408672.6A patent/CN104133153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970901A (en) * | 1973-12-14 | 1976-07-20 | Societe Anonyme Des Ateliers De Secheron | Method and apparatus for the detection of short circuits |
| CN1207361A (en) * | 1997-08-05 | 1999-02-10 | 北京市畅达贸易发展公司 | Automatic help safety device for elevator |
| EP2159868A1 (en) * | 2007-06-11 | 2010-03-03 | Panasonic Corporation | In-cell shortcircuit detection device and method and cell pack |
| CN201530653U (en) * | 2009-10-27 | 2010-07-21 | 马力 | Elevator electrical energy feedback device |
| CN104714140A (en) * | 2013-12-14 | 2015-06-17 | 天津市飞美通电梯有限公司 | Short circuit detection circuit for elevator motor |
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Application publication date: 20141105 |
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