CN102931641A - Control and protection device of multispeed motor - Google Patents
Control and protection device of multispeed motor Download PDFInfo
- Publication number
- CN102931641A CN102931641A CN2012104836761A CN201210483676A CN102931641A CN 102931641 A CN102931641 A CN 102931641A CN 2012104836761 A CN2012104836761 A CN 2012104836761A CN 201210483676 A CN201210483676 A CN 201210483676A CN 102931641 A CN102931641 A CN 102931641A
- Authority
- CN
- China
- Prior art keywords
- control
- speed control
- contactor
- push
- button switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a control and protection device of a multispeed motor. The control and protection device comprises a control and protection switch electric device, as well as a primary loop and a secondary control loop both formed by speed control switch blocks, wherein the control and protection switch electric device is provided with a high-speed protection current control terminal, a medium-speed protection current control terminal, a low-speed protection current control terminal and a current detection control output terminal; the primary loop is connected with the current detection control output terminal; and the secondary control loop is connected with the high-speed protection current control terminal, the medium-speed protection current control terminal and the low-speed protection current control terminal. The control and protection device of the multispeed motor is simple in structure, low in manufacturing cost, and more suitable for the promotion and application.
Description
Technical field
The present invention relates to dynamo-electric field, particularly a kind of multispeed electric machine control protector that different protective currents and control are provided that under different rotating speeds, moves for multispeed electric machine.
Background technology
At present; control and protective switching device well melts the function of circuit breaker, contactor, thermal relay and isolator for one; the occasions such as control system that can be widely used in automatic centralized control system and Fieldbus Based distributed production line, electrical control and the protection systems such as the Motor Control in fields such as metallurgy, colliery, iron and steel, petrochemical industry, harbour, boats and ships, railway and the illumination in protection system and the modern architecture, power supply conversion, pump, blower fan, air-conditioning.
Electric motor protecting of the prior art is the rated current according to motor, select corresponding protective current, if motor is speed change, then need different rated current, just need to select simultaneously the protected location of respective numbers, such as the words of double-speed motor with the control and protective switching device protection, must come corresponding with two control and protective switching devices with different protective current setting values, words such as three-speed motor, must be next corresponding with three control and protective switching devices with different protective current setting values, just can play the effect of protection motor; If it also is the same protecting with thermal relay, a thermal relay can only be protected a corresponding current value.In sum, because need a plurality of control and protective switching devices or a plurality of thermal relay could realize its function, cost is higher in the existing multispeed electric machine protection scheme, and volume is larger, and line construction is complicated, is unfavorable for applying.
Summary of the invention
The object of the invention is to higher for the multispeed electric machine protection scheme cost described in the background technology, volume is larger, the problem of line construction complexity provides a kind of multispeed electric machine control protector that can solve foregoing problems.
The technical scheme that can realize goal of the invention of the present invention is as follows:
A kind of multispeed electric machine control protector; it comprises control and protective switching device and the major loop and the secondary control loop that are comprised of the S/CO group; be provided with high speed protective current control end, middling speed protective current control end and low speed protective current control end and current detecting control output end on the control and protective switching device; described major loop is connected with the current detecting control output end, and described secondary control loop is connected with high speed protective current control end, middling speed protective current control end and low speed protective current control end.
Described S/CO group comprises High-speed Control contactor, middling speed control contactor and low speed control contactor, the first push-button switch that also comprises control High-speed Control contactor, the second push-button switch of control middling speed control contactor, the 3rd push-button switch of control low speed control contactor.
In described major loop; an end of often opening main contacts of High-speed Control contactor, middling speed control contactor and low speed control contactor is connected with the current detecting control output end of control and protective switching device respectively, and the other end is continuous with corresponding electrical motor gearshift tap respectively.
The end that another group of described High-speed Control contactor is often opened main contacts is connected respectively in each of low speed control contactor and often opens main contacts, the mutual short circuit of the other end.
Described secondary control loop comprises the High-speed Control branch road, middling speed control branch road and low speed control branch road, described the first push-button switch, the second push-button switch and the 3rd push-button switch all have normally-closed contact and the normally opened contact of mutual interlock, the High-speed Control contactor often to drive auxiliary contact in parallel with the normally opened contact of the first push-button switch, the circuit and the second push-button switch that form, the normally closed auxiliary contact of the normally-closed contact of the 3rd push-button switch and middling speed control contactor, the normally closed auxiliary contact of low speed control contactor, the coil of High-speed Control contactor is in series, and forms the High-speed Control branch road; The normally opened contact of described the second push-button switch and middling speed control contactor often to drive auxiliary contact in parallel, normally-closed contact and the normally closed auxiliary contact of High-speed Control contactor, the normally closed auxiliary contact of low speed control contactor and the coil of middling speed control contactor of the circuit that forms and the first push-button switch, the 3rd push-button switch are in series, and form middling speed control branch road; The normally opened contact of described the 3rd push-button switch and low speed control contactor often to drive auxiliary contact in parallel, the coil of the normally closed auxiliary contact of the normally closed auxiliary contact of the normally-closed contact of the first push-button switch, the second push-button switch and High-speed Control contactor, middling speed control contactor and low speed control contactor is in series, and forms low speed control branch road; Be composed in series whole secondary control loop with the stop button switch behind three branch circuit parallel connections.
In order to provide protection to control loop, be serially connected with fuse in the described secondary control loop.
The advantage of multispeed electric machine control protector of the present invention is: multispeed electric machine control protector of the present invention only needs a control and protective switching device in conjunction with four contactors and three push-button switches; compare with the motor protecter of three control and protective switching devices of available technology adopting; the cost decrease; and circuit structure is simple; be convenient to assembling; volume is little, is more conducive to apply.
Description of drawings
Fig. 1 is the control schematic diagram of multispeed electric machine control protector of the present invention;
Fig. 2 is the secondary control loop schematic diagram of multispeed electric machine control protector of the present invention;
Fig. 3 is the major loop connection diagram of multispeed electric machine control protector;
Figure 4 shows that the control flow chart of multispeed electric machine control protector;
Among the figure, CPS is control and protective switching device, and CH is the High-speed Control contactor; CM is the middling speed control contactor; CL is the low speed control contactor, and DI1 is low speed protective current control end, and DI2 is middling speed protective current control end; DI3 is high speed protective current control end; AH is the first push-button switch, and AM is the second push-button switch, and AL is the 3rd push-button switch; AT is the stop button switch, and AN is the rotary switch of control and protective switching device.
Embodiment
Further set forth below in conjunction with accompanying drawing 1 to 4 pairs of the specific embodiment of the present invention of accompanying drawing:
Embodiment 1
A kind of multispeed electric machine control protector; it comprises control and protective switching device CPS and the major loop and the secondary control loop that are comprised of the S/CO group; be provided with high speed protective current control end DI3, middling speed protective current control end DI2 and low speed protective current control end DI1 and current detecting control output end on the control and protective switching device CPS; described major loop is connected with the current detecting control output end, and described secondary control loop is connected with low speed protective current control end DI1 with high speed protective current control end DI3, middling speed protective current control end DI2.
Embodiment 2
In the such scheme, described S/CO group comprises High-speed Control contactor CH, middling speed control contactor CM and low speed control contactor CL, the the first push-button switch AH that also comprises control High-speed Control contactor CH, the second push-button switch AM of control middling speed control contactor CM, the 3rd push-button switch AL of control low speed control contactor CL.
Embodiment 3
In the such scheme; in described major loop; the end of often opening main contacts of High-speed Control contactor CH, middling speed control contactor CM and low speed control contactor CL is connected with the current detecting control output end of control and protective switching device CPS respectively, and the other end is continuous with corresponding electrical motor gearshift tap respectively.
Embodiment 4
In the such scheme, different according to the motor coil structure, the end that another group of described High-speed Control contactor CH is often opened main contacts is connected respectively in each of low speed control contactor CL and often opens main contacts, the mutual short circuit of the other end.
Embodiment 5
Described secondary control loop comprises the High-speed Control branch road, middling speed control branch road and low speed control branch road, described the first push-button switch AH, the second push-button switch AM and the 3rd push-button switch AL all have normally-closed contact and the normally opened contact of mutual interlock, High-speed Control contactor CH often to drive auxiliary contact in parallel with the normally opened contact of the first push-button switch AH, the circuit and the second push-button switch AM that form, the normally closed auxiliary contact of the normally-closed contact of the 3rd push-button switch AL and middling speed control contactor CM, the normally closed auxiliary contact of low speed control contactor CL, the coil of High-speed Control contactor CH is in series, and forms the High-speed Control branch road; The normally opened contact of described the second push-button switch AM and middling speed control contactor CM often to drive auxiliary contact in parallel, the circuit that forms and normally closed auxiliary contact and the normally closed auxiliary contact of High-speed Control contactor CH, the normally closed auxiliary contact of low speed control contactor CL and the coil of middling speed control contactor CM of the first push-button switch AH, the 3rd push-button switch AL are in series, and form middling speed control branch road; The normally opened contact of described the 3rd push-button switch AL and low speed control contactor CL often to drive auxiliary contact in parallel, the coil of the normally closed auxiliary contact of the normally closed auxiliary contact of the normally closed auxiliary contact of the first push-button switch AH, the second push-button switch AM and High-speed Control contactor CH, middling speed control contactor CM and low speed control contactor CL is in series, and forms low speed control branch road; Be composed in series whole secondary control loop with stop button switch AT behind three branch circuit parallel connections.
Further, in order to provide protection to control loop, be serially connected with fuse in the described secondary control loop.
Above-mentioned contactor often open normally opened contact and the normally-closed contact that auxiliary contact and normally closed auxiliary contact are respectively contactor in the secondary control loop, above-mentioned contactor often open the normally opened contact that main contacts is contactor in the major loop.
Multispeed electric machine control protector of the present invention is when using, High-speed Control contactor CH in the major loop often opens the high speed tap that main contacts connects motor, the middling speed tap of often driving main contacts connection motor of middling speed control contactor CM, the low speed tap of often driving main contacts connection motor of low speed control contactor CL, needs according to the motor coil structure, one group of end of often opening main contacts of High-speed Control contactor CH is connected respectively on the branch road of often opening main contacts of low speed control contactor CL the mutual short circuit of the other end; The main contacts of often opening of often opening main contacts and low speed control contactor CL of often opening main contacts, middling speed control contactor CM of High-speed Control contactor CH all is connected with the current detecting control output end of control and protective switching device CPS.During machine operation, first according to motor at a high speed, the required protective current value setup control of middling speed and low cruise state and the protective current of protection switch electrical equipment CPS, for example, be set as respectively 5A, 3A, 1A.The rotary switch AN of Closed control and protection switch electrical equipment CPS; control and protective switching device CPS can be worked; if motor need to run up; then press the first push-button switch AHAH; high speed protective current control end DI3 by control and protective switching device CPS is set as 5A with the protective current of control and protective switching device CPS; in the secondary control loop; the conducting of High-speed Control branch road; simultaneously; High-speed Control contactor CH conducting; in the major loop; High-speed Control contactor CH often opens the main contacts closure, high speed operation of motor, and control and protective switching device CPS gathers motor operating current; if electric current in service surpasses the protective current value 5A of predefined high-speed cruising state; then control and protective switching device CPS disconnects major loop, makes motor out of service, and motor is protected; if the current value that the current acquisition end collects less than 5A, then need not disconnect major loop.In like manner, if motor needs the middling speed operation, then press switch AM, if motor needs low cruise, then press switch AL.Accompanying drawing 4 is depicted as the control flow chart of multispeed electric machine control protector.
Above-mentioned embodiment only is the simplest execution mode of the present invention, push-button switch wherein or contacts of contactor can be controlled the contact with other and substitute such as relay contact, chopper switch, fire-fighting link make contact, DDC external control make contact, fire resisting damper etc.In addition, among the embodiment, the multispeed electric machine of mentioning is the motor of three speed, and in the practical application, multispeed electric machine also can be double speed or four-speed, only need to adjust accordingly the branch road in control loop and the major loop to get final product.These above-mentioned alternative all belong to the simple replacement of the solution of the present invention, all should fall within the scope of protection of the present invention.
Claims (6)
1. a multispeed electric machine is controlled protector; it is characterized in that: it comprises control and protective switching device and the major loop and the secondary control loop that are comprised of the S/CO group; be provided with high speed protective current control end, middling speed protective current control end and low speed protective current control end and current detecting control output end on the control and protective switching device; described major loop is connected with the current detecting control output end, and described secondary control loop is connected with high speed protective current control end, middling speed protective current control end and low speed protective current control end.
2. multispeed electric machine according to claim 1 is controlled protector; it is characterized in that: described S/CO group comprises High-speed Control contactor, middling speed control contactor and low speed control contactor; the first push-button switch that also comprises control High-speed Control contactor; the second push-button switch of control middling speed control contactor, the 3rd push-button switch of control low speed control contactor.
3. multispeed electric machine according to claim 1 is controlled protector; it is characterized in that: in described major loop; an end of often opening main contacts of High-speed Control contactor, middling speed control contactor and low speed control contactor is connected with the current detecting control output end of control and protective switching device respectively, and the other end is continuous with corresponding electrical motor gearshift tap respectively.
4. multispeed electric machine according to claim 3 control protector is characterized in that: the end that another group of described High-speed Control contactor is often opened main contacts is connected respectively in each of low speed control contactor and often opens main contacts, the mutual short circuit of the other end.
5. multispeed electric machine according to claim 2 is controlled protector, it is characterized in that: described secondary control loop comprises the High-speed Control branch road, middling speed control branch road and low speed control branch road, described the first push-button switch, the second push-button switch and the 3rd push-button switch all have normally-closed contact and the normally opened contact of mutual interlock, the High-speed Control contactor often to drive auxiliary contact in parallel with the normally opened contact of the first push-button switch, the circuit and the second push-button switch that form, the normally closed auxiliary contact of the normally-closed contact of the 3rd push-button switch and middling speed control contactor, the normally closed auxiliary contact of low speed control contactor, the coil of High-speed Control contactor is in series, and forms the High-speed Control branch road; The normally opened contact of described the second push-button switch and middling speed control contactor often to drive auxiliary contact in parallel, normally-closed contact and the normally closed auxiliary contact of High-speed Control contactor, the normally closed auxiliary contact of low speed control contactor and the coil of middling speed control contactor of the circuit that forms and the first push-button switch, the 3rd push-button switch are in series, and form middling speed control branch road; The normally opened contact of described the 3rd push-button switch and low speed control contactor often to drive auxiliary contact in parallel, the coil of the normally closed auxiliary contact of the normally closed auxiliary contact of the normally-closed contact of the first push-button switch, the second push-button switch and High-speed Control contactor, middling speed control contactor and low speed control contactor is in series, and forms low speed control branch road; Be composed in series whole secondary control loop with the stop button switch behind three branch circuit parallel connections.
6. multispeed electric machine control protector according to claim 1 is characterized in that: be serially connected with fuse in the described secondary control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483676.1A CN102931641B (en) | 2012-11-26 | 2012-11-26 | Control and protection device of multispeed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483676.1A CN102931641B (en) | 2012-11-26 | 2012-11-26 | Control and protection device of multispeed motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102931641A true CN102931641A (en) | 2013-02-13 |
| CN102931641B CN102931641B (en) | 2015-05-06 |
Family
ID=47646381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210483676.1A Active CN102931641B (en) | 2012-11-26 | 2012-11-26 | Control and protection device of multispeed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102931641B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697537A (en) * | 2020-05-29 | 2020-09-22 | 中科合成油工程有限公司 | Multi-speed motor control protection circuit and multi-speed motor control protection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1117761A2 (en) * | 1982-07-23 | 1984-10-07 | Калининградское Высшее Инженерное Морское Училище | Device for protecting asynchronous motor against abnormal condition |
| CN200976506Y (en) * | 2006-09-20 | 2007-11-14 | 张�林 | Device for controlling variable charging of electric vehicle |
| CN201266902Y (en) * | 2009-02-17 | 2009-07-01 | 克拉玛依市博瑞科技发展有限公司 | Double-speed actuator with high power factor and high loading capability |
| CN101505128A (en) * | 2009-03-30 | 2009-08-12 | 江苏新日电动车股份有限公司 | Shift control method for multi-stage motor |
| CN202906444U (en) * | 2012-11-26 | 2013-04-24 | 江苏凯隆电器有限公司 | Multi-speed motor control protector |
-
2012
- 2012-11-26 CN CN201210483676.1A patent/CN102931641B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1117761A2 (en) * | 1982-07-23 | 1984-10-07 | Калининградское Высшее Инженерное Морское Училище | Device for protecting asynchronous motor against abnormal condition |
| CN200976506Y (en) * | 2006-09-20 | 2007-11-14 | 张�林 | Device for controlling variable charging of electric vehicle |
| CN201266902Y (en) * | 2009-02-17 | 2009-07-01 | 克拉玛依市博瑞科技发展有限公司 | Double-speed actuator with high power factor and high loading capability |
| CN101505128A (en) * | 2009-03-30 | 2009-08-12 | 江苏新日电动车股份有限公司 | Shift control method for multi-stage motor |
| CN202906444U (en) * | 2012-11-26 | 2013-04-24 | 江苏凯隆电器有限公司 | Multi-speed motor control protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697537A (en) * | 2020-05-29 | 2020-09-22 | 中科合成油工程有限公司 | Multi-speed motor control protection circuit and multi-speed motor control protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102931641B (en) | 2015-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102354638B (en) | Dual-power automatic transfer switch and overload and short-circuit protection method thereof | |
| CN107171431B (en) | Uninterrupted power regulating equipment, uninterrupted power regulating system and uninterrupted power regulating control method | |
| CN202906444U (en) | Multi-speed motor control protector | |
| CN104681329A (en) | Contact system of dual power change-over switch | |
| CN103311889A (en) | Manual switching protection circuit for dual power supplies | |
| CN102931641B (en) | Control and protection device of multispeed motor | |
| CN204390924U (en) | The dynamic contact mechanism of dual-power transfer switch | |
| CN105490244B (en) | A kind of Z sources dc circuit breaker | |
| CN102088185A (en) | Bus differential protection method | |
| CN201717670U (en) | Dual-power-supply switching device with overvoltage protection | |
| CN201204570Y (en) | AC contactless control switch | |
| CN204390939U (en) | The contact system of dual-power transfer switch | |
| CN102368632B (en) | Dual-power switching system | |
| CN202309208U (en) | Dual power supply switching system | |
| CN211032596U (en) | Switch control interface circuit | |
| CN202696523U (en) | Motor positive/negative rotation circuit | |
| CN203434595U (en) | Dual power supply manual switch protection circuit | |
| CN202889265U (en) | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate | |
| CN102437520B (en) | Control circuit board of power distribution cabinet | |
| CN202121547U (en) | Control system utilizing distributed control system (DCS) for controlling motors in centralized mode | |
| CN201069463Y (en) | Quick diagnosis instrument for power loss of low-voltage control line | |
| CN202268622U (en) | Low-voltage power distribution box of intake gate | |
| CN111313370A (en) | Power supply open-phase protection circuit of alternating current servo speed regulation system | |
| CN202268632U (en) | Low-pressure power distribution box for flood gate | |
| CN104577743A (en) | Ring main unit and operating mechanism thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |