CN201774241U - Phase-loss and phase-fault protector of alternating-current motor - Google Patents
Phase-loss and phase-fault protector of alternating-current motor Download PDFInfo
- Publication number
- CN201774241U CN201774241U CN2010205008914U CN201020500891U CN201774241U CN 201774241 U CN201774241 U CN 201774241U CN 2010205008914 U CN2010205008914 U CN 2010205008914U CN 201020500891 U CN201020500891 U CN 201020500891U CN 201774241 U CN201774241 U CN 201774241U
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- phase
- cpld
- output unit
- alternating
- synchrotrans
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- Control Of Ac Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The utility model discloses a phase-loss and phase-fault protector of an alternating-current motor. The phase-loss and phase-fault protector is characterized by comprising a synchronous transformer, a voltage reshaping circuit, a CPLD, an output unit, a three-phase full-wave rectifier and filter circuit. The synchronous transformer is connected with input three-phase power of the alternating-current motor, the output unit comprises indicator lamps, a buzzer and a relay, the voltage shaping circuit is connected with the synchronous transformer to implement voltage reshaping and transmits processed square-wave signals to the CPLD to be processed further, the CPLD is connected with the indicator lamps, the buzzer and the relay in the output unit respectively, the three-phase full-wave rectifier and filter circuit is connected with an output end of the synchronous transformer to realize rectifying and filtering processes, and the output end of the three-phase full-wave rectifier and filter circuit is connected with the synchronous transformer, the voltage reshaping circuit, the CPLD and the output unit respectively. The protector has the advantages of simple structure, not only brings convenience to production but has low cost and is suitable to be popularized in alternating-current motors widely.
Description
Technical field
The utility model relates to a kind of alternating current motor phase shortage, fault-phase protection device.
Background technology
Alternating current motor commonly used at present mostly is by the three-phase alternating-current supply power supply, and the rotating magnetic field direction of impelling three-phase alternating-current motor to rotate has determined the rotation direction of motor.Under actual condition, motor is if phase shortage, misphase must cause the generation of accident.In addition, there are the structure underaction in original phase shortage, fault-phase protection device, and versatility is not strong, and the change Interface design just must change hardware, is not easy to safeguard and expansion, can not set the protection time-delay etc.So how to avoid because the accident that motor phase shortage, misphase cause, and develop a kind of alternating current motor phase shortage, the fault-phase protection device is very necessary.
Summary of the invention
The utility model is at the proposition of above problem, and develops a kind of alternating current motor phase shortage, fault-phase protection device.The technological means that the utility model adopts is as follows:
A kind of alternating current motor phase shortage, fault-phase protection device is characterized in that comprising synchrotrans, voltage shaping circuit, CPLD, output unit and three phase full wave rectification, filter circuit;
Described synchrotrans are connected with the input three-phase electricity of alternating current machine; Described output unit comprises indicator light, buzzer and relay;
Described voltage shaping circuit is connected with synchrotrans and carries out the voltage shaping and handle, and the square-wave signal after will handling is transferred to CPLD and handles; Described CPLD is connected with the indicator light in the output unit, buzzer and relay respectively; Described three phase full wave rectification, filter circuit are connected with the output of synchrotrans and carry out rectification, Filtering Processing, and the same respectively synchrotrans of the output of described three phase full wave rectification, filter circuit, voltage shaping circuit, CPLD and output unit are connected.
Earlier conspicuous with prior art than the utility model has the advantages that; this protector can be to the static phase failure, and the dynamically phase failure, misphase etc. are protected, and protection is had the time-delay output function; adopt synchrotrans to isolate voltage sample, power supply is disturbed certain inhibitory action.Because it is simple in structure, not only be convenient to produce, and with low cost being suitable for extensively promoted in alternating current motor.
Description of drawings
The utlity model has a width of cloth accompanying drawing:
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, synchrotrans, 2, the voltage shaping circuit, 3, CPLD, 4, output unit, 401, indicator light, 402, buzzer, 403, relay, 5, three phase full wave rectification, filter circuit.
Embodiment
As shown in Figure 1, this alternating current motor phase shortage, fault-phase protection device is characterized in that comprising synchrotrans 1, voltage shaping circuit 2, CPLD 3, output unit 4 and three phase full wave rectification, filter circuit 5; Described synchrotrans 1 are connected with the input three-phase electricity of alternating current machine, and three phase mains is sampled transformation for exchanging 23V; Described output unit 4 comprises indicator light 401, buzzer 402 and relay 403; Described voltage shaping circuit 2 is connected with synchrotrans 1 and carries out the voltage shaping and handle, and the square-wave signal after will handling is transferred to CPLD3 and handles; Described CPLD 3 is connected with the indicator light in the output unit 4 401, buzzer 402 and relay 403 respectively; Described three phase full wave rectification, filter circuit 5 are connected with the output of synchrotrans 1 and carry out rectification, Filtering Processing, with the 23V after synchrotrans 1 transformation through behind the three phase full wave rectification, filtering through behind the LM2575-12 power supply chip, transformation be+12V voltage supplies with synchrotrans 1, voltage shaping circuit 2, CPLD 3 and output unit 4 and power.
The working method of this protector is as follows: three-phase alternating-current supply A, B, C can have the multiple mode that is linked in sequence, but power phase has positive phase sequence for example A, B, C, negative phase sequence be for example: B, A, C after all.When three-phase alternating-current supply was positive phase sequence, motor just changeed, and corresponding just commentaries on classics indication green light is bright, for example water pump feedwater.When three-phase alternating-current supply is negative phase sequence, the motor counter-rotating, corresponding counter-rotating indication amber light is bright, and control output simultaneously makes an actuating of relay, in order to the control peripheral circuit, reaches the control motor and changes the purpose that turns to.When three-phase alternating-current supply has the phase failure, phase shortage, the stall of control motor, corresponding indication red light is bright, simultaneously output alarm information.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.
Claims (1)
1. an alternating current motor phase shortage, fault-phase protection device is characterized in that comprising synchrotrans (1), voltage shaping circuit (2), CPLD (3), output unit (4) and three phase full wave rectification, filter circuit (5);
Described synchrotrans (1) are connected with the input three-phase electricity of alternating current machine; Described output unit (4) comprises indicator light (401), buzzer (402) and relay (403);
The same synchrotrans of described voltage shaping circuit (2) (1) are connected and carry out the voltage shaping and handle, and the square-wave signal after will handling is transferred to CPLD (3) and handles; Indicator light (401) in the same respectively output unit of described CPLD (3) (4), buzzer (402) and relay (403) are connected; The output of described three phase full wave rectification, the same synchrotrans of filter circuit (5) (1) is connected and carries out rectification, Filtering Processing, and the same respectively synchrotrans of output (1) of described three phase full wave rectification, filter circuit (5), voltage shaping circuit (2), CPLD (3) and output unit (4) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205008914U CN201774241U (en) | 2010-08-17 | 2010-08-17 | Phase-loss and phase-fault protector of alternating-current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205008914U CN201774241U (en) | 2010-08-17 | 2010-08-17 | Phase-loss and phase-fault protector of alternating-current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774241U true CN201774241U (en) | 2011-03-23 |
Family
ID=43754078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205008914U Expired - Fee Related CN201774241U (en) | 2010-08-17 | 2010-08-17 | Phase-loss and phase-fault protector of alternating-current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774241U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364647A (en) * | 2013-07-31 | 2013-10-23 | 襄垣县树元电器有限公司 | Device for detecting high voltage default phase of transformer |
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
-
2010
- 2010-08-17 CN CN2010205008914U patent/CN201774241U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364647A (en) * | 2013-07-31 | 2013-10-23 | 襄垣县树元电器有限公司 | Device for detecting high voltage default phase of transformer |
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
| CN104678860B (en) * | 2015-02-11 | 2017-05-24 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
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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: 20110323 Termination date: 20150817 |
|
| EXPY | Termination of patent right or utility model |