CN202050233U - Automatic electric motor protector - Google Patents
Automatic electric motor protector Download PDFInfo
- Publication number
- CN202050233U CN202050233U CN2011201432752U CN201120143275U CN202050233U CN 202050233 U CN202050233 U CN 202050233U CN 2011201432752 U CN2011201432752 U CN 2011201432752U CN 201120143275 U CN201120143275 U CN 201120143275U CN 202050233 U CN202050233 U CN 202050233U
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- resistance
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- diode
- triode
- negative pole
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- Control Of Electric Motors In General (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The utility model relates to a protector, in particular to an automatic electric motor protector, which comprises a voltage comparator , wherein the voltage comparator consists of a resistor R5, a resistor R6, a resistor R7 and a proportion operational amplifier ICIA and is connected with a connecting pin 4, a connecting pin 3 is connected with a reverse phase input electrode of a proportion operational amplifier LM3, a resistor R14 is connected with the in-phase input electrode of the proportion operational amplifier LM3 and is connected with a resistor R15, the proportion operational amplifier LM3 is connected in series with a diode D1' and a resistor Rb1, and the in-phase input electrode of a proportion operational amplifier LM4 is connected with a resistor R8 and a resistor R9, and a positive electrode of the diode D1 is connected with the proportion operational amplifier LM4. The device can realize an automatic protection effect on both the over current and the grounding of the electric motor, and a butt joint function with an original locomotive control circuit can also be realized through a universal conversion switch, so a traction electric motor of a locomotive can realize automatic protection and manual protection, the operation flexibility of a driver is higher, and the work efficiency is improved.
Description
Technical field
The utility model relates to a kind of protective device, especially a kind of motor automatic safety device.
Background technology
Can't protect automatically when the traction motor of diesel locomotive in running overcurrent or earth fault takes place at present; but protect by manual switch fault universal seclector; when certain traction motor generation overcurrent or earth fault; major loop overcurrent or earth fault relay action; its normally-closed contact that is connected in LLC and the LC coil circuit is opened; LLC, LC dead electricity, the diesel engine unloading.At this moment the driver moves on for locomotive still can be kept, and can only carry out manual switch one by one to 6 fault universal seclector 1～6GK, excises the traction motor of fault with this.In this operating process, behind fault universal seclector of manual switch, hand-reset overcurrent or earth fault relay again, and then open machine, after that traction motor of fault is cut, overcurrent or earth fault relay just are failure to actuate, locomotive could normally open machine and keep and advance, this kind operation not only makes driver's work become loaded down with trivial details, and the fault traction motor can not by excision timely make fault have extended may, also brought adverse effect for like this maintenance of traction motor and maintenance.
Summary of the invention
In order to overcome the deficiency that motor can't be protected automatically, the utility model provides a kind of motor automatic safety device.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of motor automatic safety device; switch m connects pin 1 and pin 2; capacitor C 3 positive poles link to each other with resistance R 1; negative pole links to each other with resistance R 4; and and resistance R 1; resistance R 2; resistance R 3; resistance R 4 parallel connections; diode DZ and resistance R 2; resistance R 3; resistance R 4 parallel connections; resistance R 5; resistance R 6; resistance R 7 is formed voltage comparator with scale operation amplifier ICIA and is connected pin 4; capacitor C 4 and resistance R 3; resistance R 4 parallel connections; pin 3 connects the anti-phase input utmost point of scale operation amplifier LM3; resistance R 14 connects the homophase input utmost point of scale operation amplifier LM3 and is connected with resistance R 15; scale operation amplifier LM3 and diode D1 '; resistance R b1 series connection; capacitor C 1 links to each other with the emitter of triode Q1; resistance R b1 links to each other with the base stage of triode Q1; the collector electrode of triode Q1 and resistance R 16; resistance R C1 links to each other and links to each other with the positive pole of diode D5; the negative pole of diode D5 links to each other with the positive pole of diode D6; the negative pole of diode D6 links to each other with the negative pole of diode D7; the positive pole of diode D7 links to each other with the negative pole of diode D8; the positive pole of diode D8 links to each other with the collector electrode of triode Q3; the negative pole of diode D6 links to each other with resistance R 13; resistance R 13 and relay GJ coils from parallel connection of coils; pin 7; pin 8 is often opened main contact with relay GJ and is linked to each other; the collector electrode of triode Q2 and resistance R c2; resistance R 17 links to each other; and link to each other with the negative pole of diode D13; the base stage of triode Q2 links to each other with resistance R b2; the collector electrode of triode Q2 and resistance R c2; resistance R 17 links to each other; the negative pole of diode D13 links to each other with the collector electrode of triode Q3; the positive pole of diode D13 links to each other with relay YJ coil; pin 5; pin 6 is often opened main contact with relay YJ and is linked to each other; the homophase input utmost point and the resistance R 8 of scale operation amplifier LM4; resistance R 9 links to each other; the positive pole of diode D1 links to each other with computing proportional amplifier LM4; negative pole and capacitor C 0; resistance R b3 links to each other; the base stage of triode Q3 links to each other with resistance R b3; collector electrode and resistance R C3; resistance R 10 and resistance R b4 link to each other; the base stage of triode Q4 links to each other with resistance R b4; collector electrode and resistance R c4; resistance R 12 links to each other; the positive pole of diode D12 links to each other with resistance R 18, and negative pole links to each other with the collector electrode of triode Q4.
According to another embodiment of the present utility model, further comprise: this device working power is 110V, and installing inner triode, scale operation amplifier, voltage comparator working power voltage is 5V.
The beneficial effects of the utility model are: this device all can play automatic protective effect to the overcurrent and the ground connection of traction motor; also can by universal seclector realize with former locomotive control circuit to connection function; make the traction motor of locomotive can protect automatically and can manually protect; make driver's operating flexibility stronger, improved operating efficiency.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a schematic diagram of the present utility model.
Embodiment
As Fig. 1 is structural representation of the present utility model; a kind of motor automatic safety device; switch m connects pin 1 and pin 2; capacitor C 3 positive poles link to each other with resistance R 1; negative pole links to each other with resistance R 4; and and resistance R 1; resistance R 2; resistance R 3; resistance R 4 series connection; diode DZ and resistance R 2; resistance R 3; resistance R 4 parallel connections; resistance R 5; resistance R 6; resistance R 7 is formed voltage comparator with scale operation amplifier ICIA and is connected pin 4; capacitor C 4 and resistance R 3; resistance R 4 parallel connections; pin 3 connects the anti-phase input utmost point of scale operation amplifier LM3; resistance R 14 connect scale operation amplifier LM3 the homophase input utmost point and and resistance R 15 parallel connections; scale operation amplifier LM3 and diode D1 '; resistance R b1 series connection; capacitor C 1 links to each other with the emitter of triode Q1; resistance R b1 links to each other with the base stage of triode Q1; the collector electrode of triode Q1 and resistance R 16; resistance R C1 links to each other; the negative pole of diode D2 links to each other with capacitor C 2; positive pole links to each other with the positive pole of diode D5; the negative pole of diode D5 links to each other with the positive pole of diode D6; the negative pole of diode D6 links to each other with the negative pole of diode D7; the positive pole of diode D7 links to each other with the negative pole of diode D8; the positive pole of diode D8 links to each other with the positive pole of diode D9; the negative pole of diode D9 links to each other with capacitor C 5; the negative pole of diode D6 links to each other with resistance R 13; resistance R 13 and relay GJ parallel connection; pin 7; pin 8 links to each other with relay GJ; the collector electrode of triode Q2 and resistance R c2; resistance R 17 links to each other; and link to each other with the negative pole of diode D13; the positive pole of diode D2 links to each other with the positive pole of diode D3; the base stage of triode Q2 links to each other with resistance R b3; the emitter of triode Q2 links to each other with capacitor C 3; the collector electrode of triode Q2 and resistance R c2; resistance R 17 links to each other; capacitor C 4 links to each other with the negative pole of diode D4; the positive pole of diode D4 links to each other with the negative pole of diode D13; the positive pole of diode D13 links to each other with relay YJ; pin 5; pin 6 links to each other with relay YJ; the homophase input utmost point and the resistance R 8 of scale operation amplifier LM4; resistance R 9 links to each other; the positive pole of diode D1 links to each other with computing proportional amplifier LM4; negative pole and capacitor C 0; resistance R B2 links to each other; the base stage of triode Q3 links to each other with resistance R B2; collector electrode and resistance R C3; resistance R 10 links to each other; the positive pole of diode D10 links to each other with the positive pole of diode D9; negative pole and capacitor C 6; resistance R b4 links to each other; the base stage of triode Q4 links to each other with resistance R b4; collector electrode and resistance R c4; resistance R 12 links to each other; the positive pole of diode D12 links to each other with resistance R 18; negative pole links to each other with the positive pole of diode D11; the negative pole of diode D11 links to each other with capacitor C 7, and this device working power is 5V.
During work, when first motor normally moves, the voltage of ground signalling input pin 3 is lower than the voltage of voltage comparator reference voltage point, then voltage comparator is exported high level, triode Q1 conducting output low level, Q2 is by the output high level, the anode of diode D13 is a high level, the voltage of over-current signal input pin 4 is lower than the voltage of voltage comparator reference voltage point after the scale operation amplifier amplifies, then voltage comparator is exported high level, triode Q3 conducting output low level, triode Q4 is by the output high level, and the anode of diode D12 is a high level, and the voltage of ground signalling input pin 3 is higher than the voltage of voltage comparator reference voltage point when first motor generation earth fault, voltage comparator output low level then, triode Q1 is by the output high level, and D5 is bright for the ground signalling indicator light, diode D6 conducting, power transfer relay GJ coil two ends are high level, Q2 conducting output low level.When first motor generation over current fault, the voltage of over-current signal input pin 4 is higher than the voltage of voltage comparator reference voltage point after the scale operation amplifier amplifies, voltage comparator output low level then, triode Q3 is by the output high level, D6 is bright for the over-current signal indicator light, diode D7 conducting, power transfer relay GJ coil two ends are high level, triode Q4 conducting output low level.Because of D12 and D13 formation diode AND gate circuit, D6 and D7 constitute the diode OR gate circuit, so have only when D12 and D13 all export high level, high power relay YJ (operation relay) coil gets, it seals in the normally opened contact closure in the traction electric machine main contactor coil control circuit, make the conducting of main contactor wire loop, the motor operate as normal.At this moment the equal output low level of D6 and D7, high power relay GJ (power transfer relay) coil must not, traction electric machine can not be cut, when as long as D12 and D13 have an output low level, high power relay YJ (operation relay) coil is dead electricity just, its normally opened contact that seals in the traction electric machine main contactor coil control circuit disconnects, and the main contactor wire loop is disconnected, and motor is cut.An output high level must be arranged among D6 and the D7 this moment, then high power relay GJ (power transfer relay) coil get electric, its normally opened contact closure, because of its normally opened contact in parallel with traction motor main contactor normally opened contact.So after excising this fault motor, do not influence the continuation operation of all the other motors.This device all can play automatic protective effect to the overcurrent and the ground connection of traction motor; also can by universal seclector realize with former locomotive control circuit to connection function; make the traction motor of locomotive can protect automatically and can manually protect, make driver's operating flexibility stronger.
Claims (2)
1. motor automatic safety device; it is characterized in that: switch m connects pin 1 and pin 2; capacitor C 3 positive poles link to each other with resistance R 1; negative pole links to each other with resistance R 4; and and resistance R 1; resistance R 2; resistance R 3; resistance R 4 parallel connections; diode DZ and resistance R 2; resistance R 3; resistance R 4 parallel connections; resistance R 5; resistance R 6; resistance R 7 is formed voltage comparator with scale operation amplifier ICIA and is connected pin 4; capacitor C 4 and resistance R 3; resistance R 4 parallel connections; pin 3 connects the anti-phase input utmost point of scale operation amplifier LM3; resistance R 14 connects the homophase input utmost point of scale operation amplifier LM3 and is connected with resistance R 15; scale operation amplifier LM3 and diode D1 '; resistance R b1 series connection; capacitor C 1 links to each other with the emitter of triode Q1; resistance R b1 links to each other with the base stage of triode Q1; the collector electrode of triode Q1 and resistance R 16; resistance R C1 links to each other; and link to each other with the positive pole of diode D5; the negative pole of diode D5 links to each other with the positive pole of diode D6; the negative pole of diode D6 links to each other with the negative pole of diode D7; the positive pole of diode D7 links to each other with the negative pole of diode D8; the positive pole of diode D8 links to each other with the collector electrode of triode Q3; the negative pole of diode D6 links to each other with resistance R 13; resistance R 13 and relay GJ coils from parallel connection of coils; pin 7; pin 8 is often opened main contact with relay GJ and is linked to each other; the collector electrode of triode Q2 and resistance R c2; resistance R 17 links to each other; and link to each other with the negative pole of diode D13; the positive pole of diode D13 links to each other with relay YJ coil; pin 5; pin 6 is often opened main contact with relay YJ and is linked to each other; the homophase input utmost point and the resistance R 8 of scale operation amplifier LM4; resistance R 9 links to each other; the positive pole of diode D1 links to each other with computing proportional amplifier LM4; negative pole and capacitor C 0; resistance R b3 links to each other; the base stage of triode Q3 links to each other with resistance R b3; collector electrode and resistance R C3; resistance R 10 and resistance R b4 link to each other; the base stage of triode Q4 links to each other with resistance R b4; collector electrode and resistance R c4; resistance R 12 links to each other; the positive pole of diode D12 links to each other with resistance R 18, and negative pole links to each other with the collector electrode of triode Q4.
2. motor automatic safety device according to claim 1 is characterized in that: this device working power is 110V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201432752U CN202050233U (en) | 2011-05-09 | 2011-05-09 | Automatic electric motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201432752U CN202050233U (en) | 2011-05-09 | 2011-05-09 | Automatic electric motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202050233U true CN202050233U (en) | 2011-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201432752U Expired - Fee Related CN202050233U (en) | 2011-05-09 | 2011-05-09 | Automatic electric motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202050233U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199317A (en) * | 2016-08-31 | 2016-12-07 | 浙江佳乐科仪股份有限公司 | The winding displacement test circuit that a kind of simple accuracy is high |
-
2011
- 2011-05-09 CN CN2011201432752U patent/CN202050233U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199317A (en) * | 2016-08-31 | 2016-12-07 | 浙江佳乐科仪股份有限公司 | The winding displacement test circuit that a kind of simple accuracy is high |
| CN106199317B (en) * | 2016-08-31 | 2022-11-11 | 浙江佳乐科仪股份有限公司 | Simple and easy high winding displacement test circuit of accuracy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20170509 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |