CN203339997U - Motor voltage reduction starting protector - Google Patents
Motor voltage reduction starting protector Download PDFInfo
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- CN203339997U CN203339997U CN2013202723650U CN201320272365U CN203339997U CN 203339997 U CN203339997 U CN 203339997U CN 2013202723650 U CN2013202723650 U CN 2013202723650U CN 201320272365 U CN201320272365 U CN 201320272365U CN 203339997 U CN203339997 U CN 203339997U
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- contactor
- loop
- control
- switching device
- protective switching
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Abstract
The utility model relates to a motor voltage reduction starting protector. The protector comprises a major loop and a secondary control loop, wherein the loops are formed by CPS control and protection switch electrical appliances and a plurality of contactors. In the major loop, the main contacts of the contactors and the winding of the motor form a voltage reduction starting state loop and a normal operation state loop. One end of the main contactor of the CPS control and protection switch electrical appliance is connected with a three-phase power supply, and the other end thereof is connected with the voltage reduction starting state loop and the normal operation state loop. In the secondary control loop, the programmable input end of the CPS control and protection switch electrical appliance is provided with a switch control loop. The power supply port of the CPS control and protection switch electrical appliance is connected with a single-phase power supply. The power supply port is in parallel connection with an operation state control loop. The protector is simple in structure, can not only achieve voltage reduction starting of the motor, but also provide overcurrent and overload protection for the motor. The protector is convenient to operate, and remote control of the protector is easy to achieve.
Description
Technical field
The utility model relates to dynamo-electric field, particularly a kind of control system that reduced-voltage starting is provided when electric motor starting.
Background technology
Asynchronous machine is in start-up course, starting current is larger, must take certain measure to be protected motor, prevent that motor from burning out, in prior art, in the reduced-voltage starting circuit of asynchronous machine, usually contactor need to be set, the time relay etc., switched reduced-voltage starting by time relay time delay, this Starting mode can't be learnt the electric motor starting state, control inaccurate, can't adapt to the situations such as variation start-up time that cause because of load variations, and device contacts is more, the circuit-line complex structure, also can't meet the demand that the intelligent power distribution watch-dog is realized remote monitoring.
Summary of the invention
The purpose of this utility model is for the existing electric machine step-down starting control circuit complexity described in background technology; element is many; can't judge the problem whether start-up course completes according to the actual current size; adopt Novel intelligent CPS control and protective switching device; as required; setting program adopts traditional time delay switching mode or selects judgement actual current mode, provides a kind of circuit simple, and convenient operation also can be used for the electric machine step-down starting protector that intelligent power distribution is monitored.
The technical scheme that realizes the purpose of this utility model is as follows:
A kind of electric machine step-down starting protector, it comprises major loop and secondary control loop that CPS control and protective switching device and several contactors form, in major loop, the main contact of contactor and the winding of motor form reduced-voltage starting state loop and normal operating condition loop, main contact one end of CPS control and protective switching device connects three phase mains, the other end is connected with the normal operating condition loop with reduced-voltage starting state loop, in secondary control loop, the input able to programme of CPS control and protective switching device arranges switch control circuit, the power port of CPS control and protective switching device is connected with single phase poaer supply, power port is parallel with the running status control loop.
Described reduced-voltage starting state loop and normal operating condition loop are respectively the star/triangle loop, it comprises the first contactor and the second contactor, the head end of three phase windings of motor is connected with the main contact of CPS control and protective switching device, in reduced-voltage starting state loop, the main contact leading-out terminal short circuit of the first contactor, be connected on the tail end terminal of three phase windings of motor, in the normal operating condition loop, the main contact of the second contactor is connected respectively head end and the tail end at three phase windings of motor, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the coil that branch road comprises the first contactor of mutual series connection, the first output normally opened contact able to programme of the normally-closed contact of the second contactor and CPS control and protective switching device, the coil that branch road comprises the second contactor of mutual series connection is controlled in normal operation, the second output normally opened contact able to programme of the normally-closed contact of the first contactor and CPS control and protective switching device.
Described reduced-voltage starting state loop comprises the first main noddle on contactor, the second main noddle on contactor and autotransformer, the first main noddle on contactor one end is connected with three phase mains, the other end is connected with the terminal of autotransformer, the second main noddle on contactor one end is connected with the another terminal of autotransformer, the second main noddle on contactor other end short circuit, the centre tap of autotransformer is connected with the winding of motor, described normal operating condition loop comprises the main contact of the 3rd contactor, main contact one end of the 3rd contactor is connected with three phase mains, the other end is connected with the winding of motor, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the first output normally opened contact able to programme that branch road comprises the CPS control and protective switching device, the coil of the first contactor, the normally-closed contact of the coil of the second contactor and the 3rd contactor, the coil of the first contactor, the coils from parallel connection of coils of the second contactor, the loop and the first output normally opened contact able to programme that form, the normally-closed contact series connection of the 3rd contactor, the second output normally opened contact able to programme that branch road comprises the CPS control and protective switching device of mutual series connection is controlled in described normal operation, the normally-closed contact of the first contactor, the coil of the normally-closed contact of the second contactor and the 3rd contactor.
Described normal operating condition loop comprises the first contactor; the first contactor one end connects three phase mains; other end connecting motor coil; reduced-voltage starting state loop comprises regulating resistor; regulating resistor one end is connected with three phase mains; the other end is connected with motor coil, and the running status control loop comprises the first output normally opened contact able to programme of CPS control and protective switching device and the coil of the first contactor.
In above-mentioned several scheme; described switch control circuit comprises normally closed key switch, often opens the auxiliary normally opened contact of key switch and CPS control and protective switching device; the auxiliary normally opened contact of CPS control and protective switching device is with often to open key switch in parallel; connect with normally closed key switch in the loop formed, the external control mode port short circuit of CPS control and protective switching device.
In above-mentioned several scheme, the communication port of described CPS control and protective switching device is connected with host computer.
Electric machine step-down starting protector of the present utility model has adopted Novel intelligent CPS control and protective switching device and several contactors to control to realize different reduced-voltage startings, simple in structure, the CPS control and protective switching device both can arrange the closure of each output normally opened contact able to programme/off-state switching time, control the cut-off/close of each contactor, start the time of loop access with controlled hypotension, also can be by the starting current of CPS control and protective switching device monitoring motor, judge whether start-up course completes, start the switching of loop and normal operating loop with controlled hypotension, it is more accurate to control, and the user can be according to equipment or loading condition needs, the mode of change reduced-voltage starting, simple to operate, the CPS control and protective switching device can also provide to motor the protections such as over-current and-load.The RS485 PORT COM of the CPS control and protective switching device in the utility model is connected with the host computer of intelligent power distribution equipment by fieldbus and realizes communication; just can realize real-time remote monitoring and the control of equipment, be applicable to the demand of intelligent grid technical development.
The accompanying drawing explanation
The theory diagram that Fig. 1 is electric machine step-down starting protector embodiment 1 of the present utility model;
The major loop schematic diagram that Fig. 2 is electric machine step-down starting protector embodiment 2 of the present utility model;
The secondary control loop schematic diagram that Fig. 3 is electric machine step-down starting protector embodiment 2 of the present utility model;
The major loop schematic diagram that Fig. 4 is electric machine step-down starting protector embodiment 3 of the present utility model;
The secondary control loop schematic diagram that Fig. 5 is electric machine step-down starting protector embodiment 3 of the present utility model;
The major loop schematic diagram that Fig. 6 is electric machine step-down starting protector embodiment 4 of the present utility model;
The secondary control loop schematic diagram that Fig. 7 is electric machine step-down starting protector embodiment 4 of the present utility model;
In figure, 1 is the CPS control and protective switching device, 2a is the first output normally opened contact able to programme in embodiment 2, 2b is the first output normally opened contact able to programme in embodiment 3, 2c is the first output normally opened contact able to programme in embodiment 4, 3a is the second output normally opened contact able to programme in embodiment 2, 3b is the second output normally opened contact able to programme in embodiment 3, 4 is auxiliary normally opened contact, 5 main contacts that are the CPS control and protective switching device, the coil that 6a is the first contactor in embodiment 2, the coil that 6b is the first contactor in embodiment 3, the coil that 6c is the first contactor in embodiment 4, the coil that 7a is the second contactor in embodiment 2, the coil that 7b is the second contactor in embodiment 3, 8 coils that are the 3rd contactor, the main contact that 9a is the first contactor in embodiment 2, the main contact that 9b is the first contactor in embodiment 3, the main contact that 9c is the first contactor in embodiment 4, the main contact that 10a is the second contactor in embodiment 2, the main contact that 10b is the second contactor in embodiment 3, 11 main contacts that are the 3rd contactor, the normally-closed contact that 12a is the first contactor in embodiment 2, the normally-closed contact that 12b is the first contactor in embodiment 3, the normally-closed contact that 12c is the first contactor in embodiment 4, the normally-closed contact that 13a is the second contactor in embodiment 2, the normally-closed contact that 13b is the second contactor in embodiment 3, 14 normally-closed contacts that are the 3rd contactor, 15 is autotransformer, 16 is regulating resistor, 17 is motor, 18 is external control mode port, 19 is normally closed key switch, 20 for often opening key switch, 21 is input able to programme, 22 is power port.
Embodiment
Carry out detailed illustrating below in conjunction with accompanying drawing 1 to 7 pairs of embodiments of the present utility model of accompanying drawing:
A kind of electric machine step-down starting protector, it comprises major loop and secondary control loop that CPS control and protective switching device 1 and several contactors form, in major loop, the main contact of contactor and the winding of motor form reduced-voltage starting state loop and normal operating condition loop, main contact one end of CPS control and protective switching device connects three phase mains, the other end is connected with the normal operating condition loop with reduced-voltage starting state loop, in secondary control loop, the input able to programme 21 of CPS control and protective switching device 1 arranges switch control circuit, the power port 22 of CPS control and protective switching device 1 is connected with single phase poaer supply, power port 22 is parallel with the running status control loop.
The basic embodiment that such scheme is the electric machine step-down starting protector; described major loop and secondary control loop can take multiple reduced-voltage starting protective circuit to be protected motor; therefore, only the particular circuit configurations of major loop and secondary control loop being carried out to the simple technical scheme of replacing formation of revising all should fall in the protection range of claim of the present utility model.
Embodiment 2
On embodiment 1 basis, described reduced-voltage starting state loop and normal operating condition loop are respectively the star/triangle loop, it comprises the first contactor and the second contactor, the head end of three phase windings of motor 17 is connected with the main contact 5 of CPS control and protective switching device, in reduced-voltage starting state loop, the main contact 9a leading-out terminal short circuit of the first contactor, be connected on the tail end terminal of three phase windings of motor 17, in the normal operating condition loop, the main contact 10a of the second contactor is connected respectively head end and the tail end at three phase windings of motor 17, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the coil 6a that branch road comprises the first contactor of mutual series connection, the first output normally opened contact 2a able to programme of the normally-closed contact 13a of the second contactor and CPS control and protective switching device 1, the coil 7a that branch road comprises the second contactor of mutual series connection is controlled in normal operation, the second output normally opened contact 3a able to programme of the normally-closed contact 12a of the first contactor and CPS control and protective switching device 1.
This embodiment has adopted the star/triangle loop to carry out reduced-voltage starting control, in the electric machine step-down starting stage, at reduced-voltage starting, control in branch road, the first output normally opened contact 2a closure able to programme of CPS control and protective switching device 1, the coil 6a conducting of the first contactor, in branch road is controlled in normal operation, the second output normally opened contact 3a able to programme of CPS control and protective switching device 1 disconnects, the normally-closed contact 12a of the first contactor disconnects, the coil 7a of the second contactor is in off-state, in major loop, the main contact 9a closure of the first contactor, the main contact 10a of the second contactor disconnects, the motor winding is star connection, starting resistance is large, correspondingly reduce starting current, after motor 17 has started, in branch road is controlled in normal operation, the second output normally opened contact 3a closure able to programme of CPS control and protective switching device 1, the coil 7a of the second contactor is in closure state, at reduced-voltage starting, control in branch road, the first output normally opened contact 2a able to programme of CPS control and protective switching device disconnects, the normally closed interlock 13a of the second contactor disconnects, the coil 6a of the first contactor disconnects, in major loop, the main contact 9a of the first contactor disconnects, the main contact 10a closure of the second contactor, at this moment, the motor winding is delta connection.According to motor starting time, can on CPS control and protective switching device 1, set the first output normally opened contact 2a able to programme, closure and the opening time of the second output normally opened contact 3a able to programme, and then switching time of motor winding star connection and delta connection in the setting major loop, current value in the time of also can setting motor on CPS control and protective switching device 1 and normally move is controlled the switching between star connection and delta connection, after electric motor starting completes, when electric current returns to normal running status electric current, in major loop, the motor winding is switched to delta connection from star connection.
Embodiment 3
On embodiment 1 basis, described reduced-voltage starting state loop comprises the first main noddle on contactor 9b, the second main noddle on contactor 10b and autotransformer 15, the first main noddle on contactor 9b mono-end is connected with three phase mains, the other end is connected with the terminal of autotransformer 15, the second main noddle on contactor 10b mono-end is connected with the another terminal of autotransformer 15, the second main noddle on contactor 10b other end short circuit, the centre tap of autotransformer is connected with the winding of motor 17, described normal operating condition loop comprises the main contact 11 of the 3rd contactor, main contact 11 1 ends of the 3rd contactor are connected with three phase mains, the other end is connected with the winding of motor 17, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the first output normally opened contact 2b able to programme that branch road comprises CPS control and protective switching device 1, the coil 6b of the first contactor, the coil 7b of the second contactor and the normally-closed contact 14 of the 3rd contactor, the coil 6b of the first contactor, the coil 7b parallel connection of the second contactor, the loop and the first output normally opened contact 2b able to programme that form, normally-closed contact 14 series connection of the 3rd contactor, the second output normally opened contact 3b able to programme that branch road comprises the CPS control and protective switching device 1 of mutual series connection is controlled in described normal operation, the normally-closed contact 12b of the first contactor, the normally-closed contact 13b of the second contactor and the coil 8 of the 3rd contactor.
This embodiment has adopted autotransformer 15 to carry out reduced-voltage starting control, in the electric machine step-down starting stage, at reduced-voltage starting, control in branch road, the first output normally opened contact 2b closure able to programme of CPS control and protective switching device 1, the coil 7b conducting of the coil 6b of the first contactor and the second contactor, in branch road is controlled in normal operation, the second output normally opened contact 3b able to programme of CPS control and protective switching device 1 disconnects, the normally-closed contact 12b of the first contactor and the normally-closed contact 13b of the second contactor disconnect, the coil 8 of the 3rd contactor is in off-state, in major loop, the main contact 10b closure of the main contact 9b of the first contactor and the second contactor, the main contact 11 of the 3rd contactor disconnects, carry out step-down by setting autotransformer 15, correspondingly reduce starting current, after motor 17 has started, in branch road is controlled in normal operation, the second output normally opened contact 3b closure able to programme of CPS control and protective switching device 1, the coil 8 of the 3rd contactor is in closure state, at reduced-voltage starting, control in branch road, the first output normally opened contact 2a able to programme of CPS control and protective switching device 1 disconnects, the normally closed interlock 14 of the 3rd contactor disconnects, the coil 6b of the first contactor and the coil 7b of the second contactor disconnect, in major loop, the main contact 9b of the first contactor and the main contact 10b of the second contactor disconnect, main contact 11 closures of the 3rd contactor, at this moment, not by autotransformer 15 step-downs, motor 17 enters normal operation, current value in the time of also can setting motor on CPS control and protective switching device 1 and normally move is controlled access and the disconnection of autotransformer, after electric motor starting completes, autotransformer disconnects, electric current returns to normal running status electric current, motor enters normal operation.
On embodiment 1 basis; described normal operating condition loop comprises the first contactor; the first contactor one end connects three phase mains; the other end connects the motor winding; reduced-voltage starting state loop comprises regulating resistor 16; regulating resistor 16 1 ends are connected with three phase mains, and the other end is connected with the motor winding, and the running status control loop comprises the first output normally opened contact 2c able to programme of CPS control and protective switching device and the coil 6c of the first contactor.
This embodiment has adopted regulating resistor 16 to carry out reduced-voltage starting control, in the electric machine step-down starting stage, in secondary control loop, the first output normally opened contact 2c able to programme of CPS control and protective switching device 1 disconnects, and the coil 9c of the first contactor disconnects, in major loop, the main contact 9c of the first contactor disconnects, by regulating resistor 16 is set, electric motor starting resistance is increased, correspondingly reduce starting current; After electric motor starting completes; in secondary control loop; the first output normally opened contact 2c closure able to programme of CPS control and protective switching device 1; the coil 6c of the first contactor is in closure state, in major loop, and the main contact 9c closure of the first contactor; at this moment; regulating resistor 16 is by short circuit, and resistance value reduces, and motor can normally move.
Embodiment 5
In embodiment 1 to embodiment 4; described switch control circuit comprises normally closed key switch 19, often opens the auxiliary normally opened contact 4 of key switch 20 and CPS control and protective switching device 1; the auxiliary normally opened contact 4 of CPS control and protective switching device 1 is with often to open key switch 20 in parallel; connect with normally closed key switch 19 in the loop formed, external control mode port one 8 short circuits of CPS control and protective switching device 1.
Press while often opening key switch 20; 1 conducting of CPS control and protective switching device; auxiliary normally opened contact closure 4; CPS control and protective switching device 1 is started working; when pressing normally closed key switch 19; CPS control and protective switching device 1 disconnects, and auxiliary normally opened contact 4 disconnects, and CPS control and protective switching device 1 quits work.In this way, opening and closing that can manual operation CPS control and protective switching device 1, and the start and stop of motor.
Embodiment 6
In above-mentioned several scheme, the communication port of CPS control and protective switching device is connected with host computer, can realize telecommunication and control, can on host computer, be arranged by switching time or the switch current to reduced-voltage starting, makes control operation more efficiently convenient.
Claims (6)
1. an electric machine step-down starting protector, it is characterized in that: it comprises major loop and secondary control loop that CPS control and protective switching device and several contactors form, in major loop, the main contact of contactor and the winding of motor form reduced-voltage starting state loop and normal operating condition loop, main contact one end of CPS control and protective switching device connects three phase mains, the other end is connected with the normal operating condition loop with reduced-voltage starting state loop, in secondary control loop, the input able to programme of CPS control and protective switching device arranges switch control circuit, the power port of CPS control and protective switching device is connected with single phase poaer supply, power port is parallel with the running status control loop.
2. electric machine step-down starting protector according to claim 1, it is characterized in that: described reduced-voltage starting state loop and normal operating condition loop are respectively the star/triangle loop, it comprises the first contactor and the second contactor, the head end of three phase windings of motor is connected with the main contact of CPS control and protective switching device, in reduced-voltage starting state loop, the main contact leading-out terminal short circuit of the first contactor, be connected on the tail end terminal of three-phase coil of motor, in the normal operating condition loop, the main contact of the second contactor is connected respectively head end and the tail end at three phase windings of motor, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the coil that branch road comprises the first contactor of mutual series connection, the first output normally opened contact able to programme of the normally-closed contact of the second contactor and CPS control and protective switching device, the coil that branch road comprises the second contactor of mutual series connection is controlled in normal operation, the second output normally opened contact able to programme of the normally-closed contact of the first contactor and CPS control and protective switching device.
3. electric machine step-down starting protector according to claim 1, it is characterized in that: described reduced-voltage starting state loop comprises the first main noddle on contactor, the second main noddle on contactor and autotransformer, the first main noddle on contactor one end is connected with three phase mains, the other end is connected with the terminal of autotransformer, the second main noddle on contactor one end is connected with the another terminal of autotransformer, the mutual short circuit of the second main noddle on contactor other end, the centre tap of autotransformer is connected with the winding of motor, described normal operating condition loop comprises the main contact of the 3rd contactor, main contact one end of the 3rd contactor is connected with three phase mains, the other end is connected with the winding of motor, the running status control loop comprises that reduced-voltage starting is controlled branch road and branch road is controlled in normal operation, reduced-voltage starting is controlled the first output normally opened contact able to programme that branch road comprises the CPS control and protective switching device, the coil of the first contactor, the normally-closed contact of the coil of the second contactor and the 3rd contactor, the coil of the first contactor, the coils from parallel connection of coils of the second contactor, the loop and the first output normally opened contact able to programme that form, the normally-closed contact series connection of the 3rd contactor, the second output normally opened contact able to programme that branch road comprises the CPS control and protective switching device of mutual series connection is controlled in described normal operation, the normally-closed contact of the first contactor, the coil of the normally-closed contact of the second contactor and the 3rd contactor.
4. electric machine step-down starting protector according to claim 1; it is characterized in that: described normal operating condition loop comprises the first contactor; the first contactor one end connects three phase mains; the other end connects the motor winding; reduced-voltage starting state loop comprises regulating resistor; regulating resistor one end is connected with three phase mains, and the other end is connected with the motor winding, and the running status control loop comprises the first output normally opened contact able to programme of CPS control and protective switching device and the coil of the first contactor.
5. according to the described electric machine step-down starting protector of any one in claim 1 to 4; it is characterized in that: described switch control circuit comprises normally closed key switch, often opens the auxiliary normally opened contact of key switch and CPS control and protective switching device; the auxiliary normally opened contact of CPS control and protective switching device is with often to open key switch in parallel; connect with normally closed key switch in the loop formed, the external control mode port short circuit of CPS control and protective switching device.
6. according to the described electric machine step-down starting protector of any one in claim 1 to 4, it is characterized in that: the communication port of described CPS control and protective switching device is connected with host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202723650U CN203339997U (en) | 2013-05-20 | 2013-05-20 | Motor voltage reduction starting protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202723650U CN203339997U (en) | 2013-05-20 | 2013-05-20 | Motor voltage reduction starting protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339997U true CN203339997U (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202723650U Expired - Lifetime CN203339997U (en) | 2013-05-20 | 2013-05-20 | Motor voltage reduction starting protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN203339997U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236808A (en) * | 2013-05-20 | 2013-08-07 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN108933431A (en) * | 2018-06-07 | 2018-12-04 | 岭东核电有限公司 | Starting protection circuit and starting protection system for nuclear power station turning motor |
-
2013
- 2013-05-20 CN CN2013202723650U patent/CN203339997U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236808A (en) * | 2013-05-20 | 2013-08-07 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN103236808B (en) * | 2013-05-20 | 2016-07-06 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN108933431A (en) * | 2018-06-07 | 2018-12-04 | 岭东核电有限公司 | Starting protection circuit and starting protection system for nuclear power station turning motor |
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