CN202093147U - Fault detection device of alternating current motor - Google Patents
Fault detection device of alternating current motor Download PDFInfo
- Publication number
- CN202093147U CN202093147U CN2011201824513U CN201120182451U CN202093147U CN 202093147 U CN202093147 U CN 202093147U CN 2011201824513 U CN2011201824513 U CN 2011201824513U CN 201120182451 U CN201120182451 U CN 201120182451U CN 202093147 U CN202093147 U CN 202093147U
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- alternating current
- current generator
- master control
- failure detector
- control borad
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Abstract
The utility model relates to a fault detection device of an alternating current motor, comprising an alternating motor heat overload protector, a normally opened contact Q1 and an alternating current contactor CD which are connected together; both ends of the normally opened contact Q1 are connected into the fault detection circuit; the output end of the fault detection circuit is connected with a main control board; the main control board is connected with the alternating current contactor CD; the detection circuit outputs corresponding high and low level signals to the main control board according to the action times of the heat overload protector; and the main control board is provided with a counting module which calculates the number of output pulse signals within a preset time. The fault detection device of the alternating current motor has a simple circuit structure, and can ensure the safe and the stable operation of an alternating current motor, an air-conditioning system and a whole train.
Description
Technical field
The utility model relates to a kind of alternating current generator failure detector, belongs to the electric machines control technology field.
Background technology
In the air-conditioning unit of rail vehicles such as subway, the outside can be provided with condensation fan, and condensation fan generally all is to adopt alternating current generator.In actual moving process; alternating current generator may be because of overload; phase shortage; reasons such as short circuit break down; in the prior art; master control borad can not detect and handle the fault of alternating current generator; alternating current generator is after breaking down; as long as reach the reset condition and the reset time of thermal overload protection device; alternating current generator is promptly opened again and is put into operation; in this case; if the alternating current generator long-play not only causes the damage of condensation fan, influence the normal operation of air-conditioning system; also can cause the tripping operation of vehicle primary power, influence the safe and stable operation of whole train.
Summary of the invention
The utility model fundamental purpose is to address the above problem and is not enough, provides a kind of circuit structure simple, can effectively protect the alternating current generator failure detector of alternating current generator safe and stable operation.
For achieving the above object, the technical solution of the utility model is:
A kind of alternating current generator failure detector, connect to form by alternating current generator thermal overload protection device, normally opened contact Q1 and A.C. contactor CD, failure detector circuit is inserted at the two ends of described normally opened contact Q1, the output terminal of described failure detector circuit is connected with master control borad, described master control borad is connected with described A.C. contactor CD, and described testing circuit is exported corresponding high-low level signal according to the action frequency of described thermal overload protection device to described master control borad; Described master control borad has the counting processing module, in a Preset Time, and the quantity of counting output pulse signal.
Further, described failure detector circuit is connected to form by plug CN651 and optocoupler PQ651, the pin 2 of described plug CN651 connects power supply by current-limiting resistance R651, the pin 1 of described plug CN651 connects the anode of described optocoupler PQ651, and the collector of described optocoupler PQ651 is outwards exported the high-low level signal through resistance R 652, resistance R 653 and capacitor C.
Further, be provided with a normally closed contact Q2 between described master control borad and the described A.C. contactor CD.
Further, the Preset Time of described counting processing module is 1 hour, and the quantity of counting output high-low level fault-signal is 3-5 time.
Content to sum up; alternating current generator failure detector provided by the utility model; by failure detector circuit is set; be used for whether moving according to the thermal overload protection device; export corresponding pulse signal to master control borad; and then judge whether fault of alternating current generator by master control borad; whether can satisfy the safe operation of air-conditioning unit; when not reaching the safe operation standard; master control borad is the loop of disengagement failure alternating current generator at once; alternating current generator can't put into operation before reparation again, and then guarantees the safe and stable operation of alternating current generator, air-conditioning system and permutation car.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
As shown in Figure 1, thermal overload protection device 1, master control borad 2, coil 3, motor 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As shown in Figure 1; a kind of alternating current generator failure detector; thermal overload protection device 1 (3UA5940-1E), normally opened contact Q1 and A.C. contactor CD by alternating current generator connect to form; the alternating current generator 4 of condensation fan is connected with three-phase supply by thermal overload protection device 1 and A.C. contactor CD; A.C. contactor CD is connected with master control borad 2; specifically the control coil 3 among the A.C. contactor CD is connected with master control borad 2; by the energising and the outage of master control borad 2 control coils 3, normally opened contact Q1 then is that thermal overload protection device 1 is incidental.The alternating current generator 4 of condensation fan when normal operation, three whole adhesives in contact of A.C. contactor CD, thermal overload protection device 1 can not move.
Failure detector circuit is inserted at two ends at normally opened contact Q1, and the output terminal of failure detector circuit is connected with master control borad 2.Failure detector circuit is mainly connected to form by plug CN651 and optocoupler PQ651, plug CN651 input end is connected with the two ends of normally opened contact Q1, pin 2 in the plug CN651 output terminal connects the power supply of 24V by current-limiting resistance R651, the pin 1 of plug CN651 connects the anode of optocoupler PQ651, the collector of optocoupler PQ651 is connected with power supply through resistance R 652, outwards export the high-low level signal through resistance R 653 and capacitor C again, promptly be connected the output terminal of light emitting diode among the optocoupler PQ651 with master control borad 2, the equal ground connection of the emitter of photosensitive semiconductor pipe and capacitor C.
When alternating current generator 4 normal operations, normally opened contact Q1 often opens, at this moment, plug CN651 open circuit, the not conducting of light emitting diode of optocoupler PQ651, therefore alternating current generator 4 fault detection signal FAN_out_FO_A are high level, when master control borad 2 receives the signal of this high level, judge that then alternating current generator 4 normally moves.
When alternating current generator 4 breaks down; thermal overload protection device 1 reaches protective condition; 1 action of thermal overload protection device; this moment normally opened contact Q1 closure; the CN651 short circuit, the light emitting diode conducting of optocoupler PQ651, so alternating current generator 4 fault detection signal FAN_out_Fo_A are low level; when master control borad 2 receives this low level fault level signal, then judge alternating current generator 4 faults.
In master control borad 1, has the counting processing module, be used in a Preset Time, the quantity of counting output fault high-low level signal, promptly counting receives the quantity of low level signal, and then judge whether this alternating current generator 4 satisfies the condition of safe operation, judge whether to need to cut off the loop of this fault alternating current generator 4 again.According to lot of experiment validation, for the condensation fan of vehicle air conditioning unit, continuous fault promptly can judge that the alternating current generator 4 of this condensation fan can't satisfy the condition of safe operation, must quit work for 3-5 time in 1 hour.
Alternating current generator 4 loops of disengagement failure condensation fan during for energy urgency; be connected a normally closed contact Q2 between control coil 3 in A.C. contactor CD and the master control borad 2; when detecting alternating current generator 4, master control borad 2 in 1 hour, breaks down 3-5 time; at once controlling normally closed contact Q2 disconnects; thereby cut off the control of the A.C. contactor CD control coil 3 of this fault alternating current generator 4; at this moment, even thermal overload protection device 1 reaches reset condition and reset time, condensation fan also can't put into operation again.
For the air-conditioning unit of rail vehicles such as subway, all be provided with two condensation fans in its outside, the alternating current generator 4 of every condensation fan all is provided with a corresponding failure detector circuit, is controlled the operation of corresponding condensation fan by mentioned above principle by master control borad 2.
Describe the control procedure of two condensation fans below in detail:
When condensation fan A or B fault; thermal overload protection device 1 action of corresponding alternating current generator 4, three contacts of corresponding A.C. contactor CD disconnect, fault condensation fan A or B shutdown; master control borad 2 can detect condensation fan A or B fault, with Times condensation fan fault.When thermal overload protection device 1 action of correspondence, reach reset condition and after reset time, the A.C. contactor CD adhesive again in fault condensation fan A or B loop, the fault condensation fan recovers running.
Table 1 is when the condensation fan fault, and processing mode is as follows:
| The ventilation blower running status | Compressor behavior | The condensation fan running status | |
| Condensation fan A fault | Open | Press the primary frequency operation | The B blower fan normally moves |
| B condensation fan B fault | Open | Press the primary frequency operation | The A blower fan normally moves |
| Condensation fan A, B simultaneous faults | Open | Shutdown | A, B shut down |
When having only a condensation fan A or B fault, corresponding thermal overload protection device 1 resets, and condensation fan recovers running, and compressor is still pressed the primary frequency operation.
When two condensation fan A and B simultaneous faults, if there is the thermal overload protection device 1 of a condensation fan A or B correspondence to reset, this condensation fan A or B recover running, and compressor continues operation by setpoint frequency before the fault after satisfying 3 minutes halt conditions; If the thermal overload protection device 1 of two condensation fan A and B correspondence all resets, two condensation fan A and B recover running, and compressor continues operation by setpoint frequency before the fault after satisfying 3 minutes halt conditions.
When condensation fan A or B in 1 hour, fault appears 3 times continuously, promptly in the failure detector circuit 1 hour to 3 low level signals of master control borad 2 outputs, then master control borad 2 cuts off the control of the A.C. contactor CD control coil 3 in these fault condensation fan A or B loop.Simultaneously, newspaper condensation fan A or B fan trouble, compressor in the air-conditioning unit and ventilation blower are still by the previous status operation.
When condensation fan A and B in 1 hour, fault all appears 3 times continuously, promptly in two failure detector circuits 1 hour all to 3 low level signals of master control borad 2 outputs, then master control borad 2 cuts off the control of the A.C. contactor CD control coil 3 in two condensation fan A and B loop.Simultaneously, newspaper condensation fan A and B fault are cut off the compressor in the air-conditioning unit, have only ventilation blower to continue operation.
As mentioned above, given in conjunction with the accompanying drawings and embodiments scheme content can derive the similar techniques scheme.In every case be the content that does not break away from technical solutions of the utility model, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (4)
1. alternating current generator failure detector, connect to form by alternating current generator thermal overload protection device, normally opened contact Q1 and A.C. contactor CD, it is characterized in that: failure detector circuit is inserted at the two ends of described normally opened contact Q1, the output terminal of described failure detector circuit is connected with master control borad, described master control borad is connected with described A.C. contactor CD, and described testing circuit is exported corresponding high-low level signal according to the action frequency of described thermal overload protection device to described master control borad;
Described master control borad has the counting processing module, in a Preset Time, and the quantity of counting output pulse signal.
2. alternating current generator failure detector according to claim 1, it is characterized in that: described failure detector circuit is connected to form by plug CN651 and optocoupler PQ651, the pin 2 of described plug CN651 connects power supply by current-limiting resistance R651, the pin 1 of described plug CN651 connects the anode of described optocoupler PQ651, and the collector of described optocoupler PQ651 is outwards exported the high-low level signal through resistance R 652, resistance R 653 and capacitor C.
3. alternating current generator failure detector according to claim 1 is characterized in that: be provided with a normally closed contact Q2 between described master control borad and the described A.C. contactor CD.
4. according to each described alternating current generator failure detector of claim 1 to 3, it is characterized in that: the Preset Time of described counting processing module is 1 hour, and the quantity of counting output high-low level signal is 3-5 time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201824513U CN202093147U (en) | 2011-06-01 | 2011-06-01 | Fault detection device of alternating current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201824513U CN202093147U (en) | 2011-06-01 | 2011-06-01 | Fault detection device of alternating current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202093147U true CN202093147U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201824513U Expired - Lifetime CN202093147U (en) | 2011-06-01 | 2011-06-01 | Fault detection device of alternating current motor |
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| Country | Link |
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| CN (1) | CN202093147U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734120A (en) * | 2015-03-12 | 2015-06-24 | 株洲南车时代电气股份有限公司 | Protection and fault detection system and method for fan motor |
| CN106300266A (en) * | 2016-07-26 | 2017-01-04 | 潘燕 | There is the alternating current generator of fault detection capability |
| CN106526377A (en) * | 2016-11-03 | 2017-03-22 | 珠海格力电器股份有限公司 | Fault arc generation system |
| CN108565828A (en) * | 2018-05-30 | 2018-09-21 | 珠海格力电器股份有限公司 | Circuit sharing overload protection and air conditioning unit with same |
| CN109406936A (en) * | 2018-12-18 | 2019-03-01 | 辽宁恒顺新能源科技有限公司 | Charging pile alarm and protection module |
-
2011
- 2011-06-01 CN CN2011201824513U patent/CN202093147U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734120A (en) * | 2015-03-12 | 2015-06-24 | 株洲南车时代电气股份有限公司 | Protection and fault detection system and method for fan motor |
| CN104734120B (en) * | 2015-03-12 | 2018-09-18 | 株洲南车时代电气股份有限公司 | Blower motor protection and fault detection system and method |
| CN106300266A (en) * | 2016-07-26 | 2017-01-04 | 潘燕 | There is the alternating current generator of fault detection capability |
| CN106300266B (en) * | 2016-07-26 | 2018-10-26 | 威马智慧出行科技（上海）有限公司 | Alternating current generator with fault detection capability |
| CN106526377A (en) * | 2016-11-03 | 2017-03-22 | 珠海格力电器股份有限公司 | Fault arc generation system |
| CN108565828A (en) * | 2018-05-30 | 2018-09-21 | 珠海格力电器股份有限公司 | Circuit sharing overload protection and air conditioning unit with same |
| CN109406936A (en) * | 2018-12-18 | 2019-03-01 | 辽宁恒顺新能源科技有限公司 | Charging pile alarm and protection module |
| CN109406936B (en) * | 2018-12-18 | 2024-04-09 | 辽宁恒顺新能源科技有限公司 | Alarm protection module for charging pile |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |