CN103414162A - Motor forward/reverse rotation protection device - Google Patents
Motor forward/reverse rotation protection device Download PDFInfo
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- CN103414162A CN103414162A CN201310295930XA CN201310295930A CN103414162A CN 103414162 A CN103414162 A CN 103414162A CN 201310295930X A CN201310295930X A CN 201310295930XA CN 201310295930 A CN201310295930 A CN 201310295930A CN 103414162 A CN103414162 A CN 103414162A
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Abstract
The invention discloses a motor protection device, in particular, a motor forward/reverse rotation protection device. A main control loop comprises a starting button SA1, a contactor 1KM, a normally-closed contact 2KM1 of a contactor 2KM, a stopping button SB, a normally-closed temperature control switch KSD1, a normally-closed temperature control switch KSD2 and a normally-closed temperature control switch KSD3 which are connected in series with one another successively, wherein the starting button SA1 is connected in parallel with a normally-open contact 1KM3 of the contactor 1KM; and further the main control loop further comprises a starting button SA2, a contactor 2KM and a normally-closed contact1KM1 of the contactor 1KM which are connected in series with one another from a U phase of a power source to a position between the normally-closed contact 2KM1 of the contactor 2KM and the stopping button SB, wherein the starting button SA2 is connected in parallel with a normally-open contact 2KM2 of the contactor 2KM. The motor forward/reverse rotation protection device can perform real-time monitoring on the temperature of each stator coil of a three-phase motor in a comprehensive and high-sensitivity manner when the motor is in forward/reverse rotation, and can control the power source to make the same stop supplying power for the three-phase motor when any one stator coil reaches predetermined temperature so as to protect the three-phase motor.
Description
Technical field
The present invention relates to a kind of electric motor protective device, be specifically related to a kind of motor positive and inverse protective device.
Background technology
While the situation such as overload, phase shortage, blocking when motor, occurring in the forward and backward running, while continuing operation, the insulation of coil of stator of motor is easy to damage, thereby various temperature protective devices occurred.
Now the temperature protective device of motor is various on the market, and pluses and minuses are respectively arranged, and roughly is divided into: 1, and insufficient sensitivity, the protection temperature is non-constant, and perhaps temperature does not still play a protective role higher than safety line yet; 2, the apparatus structure complexity, high cost, and also along with aluminium core motor is universal cheaply, because copper core is larger than the ampacity of the aluminum core line of same model, under identical service condition, the stator coil of aluminium core motor more capacity damages.
Summary of the invention
The object of the present invention is to provide a kind of motor positive and inverse protective device, solved current electric motor protective device insufficient sensitivity, operating temperature just differs, the problem that complex structure, cost are too high.
For solving above-mentioned technical problem, the present invention by the following technical solutions: a kind of motor positive and inverse protective device, comprise and be connected to power supply U phase and the power supply W main control loop between mutually,
Described main control loop comprises start button SA1, contactor 1KM, normally-closed contact 2KM1, the stop button SB of contactor 2KM, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2 and the normally closed temperature detect switch (TDS) KSD3 of serial connection successively, wherein start button SA1 is parallel with the normally opened contact 1KM3 of contactor 1KM
Main control loop also comprises from power supply U phase start button SA2, the contactor 2KM of serial connection successively and the normally-closed contact 1KM1 of contactor 1KM in addition, be connected between the normally-closed contact 2KM1 and stop button SB of contactor 2KM, wherein said start button SA2 is parallel with the normally opened contact 2KM2 of contactor 2KM;
Described normally closed temperature detect switch (TDS) KSD1 is arranged on the U phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD2 is arranged on the V phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD3 is arranged on the W phase coil of three phase electric machine;
There is the normally opened contact 1KM0 of relay 1KM to be serially connected in the forward supply line of described three phase electric machine, have the normally opened contact 2KM0 of relay 2KM to be serially connected in the counter-rotating supply line of described three phase electric machine.
Further technical scheme is, the normally opened contact 1KM3 and the forward that between described power supply U phase and power supply W phase, are serially connected with successively relay 1KM start warning light HD-1; The normally opened contact 2KM3 and the counter-rotating that between described power supply U phase and power supply W phase, are serially connected with successively relay 2KM start warning light LD-1.
Further technical scheme is, described power supply U phase and power supply W be serially connected with successively between mutually relay 1KM normally-closed contact 1KM4, relay 2KM normally-closed contact 2KM4 and stop warning light LD.
Compared with prior art; the invention has the beneficial effects as follows: when motor the time can both comprehensive, highly sensitive each stator coil temperature to three phase electric machine be monitored in real time in forward, counter-rotating; when any one stator coil reaches predetermined temperature; namely can control power supply stops, to the three phase electric machine power supply, playing the effect of protection three phase electric machine.
The accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present invention.
Fig. 2 is the installation site schematic diagram of temperature detect switch (TDS) of the present invention in three phase electric machine.
Fig. 3 is motor circuit connection layout of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1, Fig. 2 and Fig. 3 show an embodiment of motor positive and inverse protective device of the present invention: a kind of motor positive and inverse protective device, comprise the main control loop be connected between power supply U phase and power supply W phase,
As shown in Figure 1, described main control loop comprises start button SA1, contactor 1KM, normally-closed contact 2KM1, the stop button SB of contactor 2KM, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2 and the normally closed temperature detect switch (TDS) KSD3 of serial connection successively, wherein start button SA1 is parallel with the normally opened contact 1KM3 of contactor 1KM
Main control loop also comprises from power supply U phase start button SA2, the contactor 2KM of serial connection successively and the normally-closed contact 1KM1 of contactor 1KM in addition, be connected between the normally-closed contact 2KM1 and stop button SB of contactor 2KM, wherein said start button SA2 is parallel with the normally opened contact 2KM2 of contactor 2KM;
As shown in Figure 2, described normally closed temperature detect switch (TDS) KSD1 is arranged on the U phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD2 is arranged on the V phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD3 is arranged on the W phase coil of three phase electric machine;
As shown in Figure 3, there is the normally opened contact 1KM0 of relay 1KM to be serially connected in the forward supply line of described three phase electric machine, have the normally opened contact 2KM0 of relay 2KM to be serially connected in the counter-rotating supply line of described three phase electric machine.
Fig. 1 also shows another embodiment of motor positive and inverse protective device of the present invention, and the normally opened contact 1KM3 and the forward that between described power supply U phase and power supply W phase, are serially connected with successively relay 1KM start warning light HD-1; The normally opened contact 2KM3 and the counter-rotating that between described power supply U phase and power supply W phase, are serially connected with successively relay 2KM start warning light LD-1.
Fig. 1 also shows another embodiment of motor positive and inverse protective device of the present invention, described power supply U phase and power supply W be serially connected with successively between mutually relay 1KM normally-closed contact 1KM4, relay 2KM normally-closed contact 2KM4 and stop warning light LD.
Operation principle of the present invention is: no matter motor is in forward or inverted status, any one in the normally closed temperature detect switch (TDS) KSD1 in three phase electric machine, normally closed temperature detect switch (TDS) KSD2 and normally closed temperature detect switch (TDS) KSD3 disconnects because corresponding stator coil excess Temperature triggers its normally-closed contact, relay 1KM or relay 2KM outage, normally opened contact 1KM0 or normally opened contact 2KM0 disconnect, and cause three phase electric machine M to stop operating.
And when three phase electric machine was in the forward state, relay 1KM was in "on" position, its normally opened contact 1KM3 closure, forward start warning light HD-1 and light.
When three phase electric machine was in inverted status, relay 2KM was in "on" position, and its normally opened contact 2KM3 closure, forward start warning light LD-1 and light.
When three phase electric machine quits work, be that the normally-closed contact 1KM4 of relay 1KM and the normally-closed contact 2KM4 of relay 2KM all are in closure state, stop warning light LD and light.
In the present invention, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2 and normally closed temperature detect switch (TDS) KSD3 are selecting temperature control point with the exhausted about grade of motor as a reference, and temperature control point should be identical, and the temperature detect switch (TDS) of KSD9700 of all take is example.
Claims (3)
1. motor positive and inverse protective device is characterized in that: comprises and is connected to power supply U phase and the power supply W main control loop between mutually,
Described main control loop comprises start button SA1, contactor 1KM, normally-closed contact 2KM1, the stop button SB of contactor 2KM, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2 and the normally closed temperature detect switch (TDS) KSD3 of serial connection successively, wherein start button SA1 is parallel with the normally opened contact 1KM3 of contactor 1KM
Main control loop also comprises from power supply U phase start button SA2, the contactor 2KM of serial connection successively and the normally-closed contact 1KM1 of contactor 1KM in addition, be connected between the normally-closed contact 2KM1 and stop button SB of contactor 2KM, wherein said start button SA2 is parallel with the normally opened contact 2KM2 of contactor 2KM;
Described normally closed temperature detect switch (TDS) KSD1 is arranged on the U phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD2 is arranged on the V phase coil of three phase electric machine, and normally closed temperature detect switch (TDS) KSD3 is arranged on the W phase coil of three phase electric machine;
There is the normally opened contact 1KM0 of relay 1KM to be serially connected in the forward supply line of described three phase electric machine, have the normally opened contact 2KM0 of relay 2KM to be serially connected in the counter-rotating supply line of described three phase electric machine.
2. a kind of motor positive and inverse protective device according to claim 1, is characterized in that: the normally opened contact 1KM3 and the forward startup warning light HD-1 that between described power supply U phase and power supply W phase, are serially connected with successively relay 1KM; The normally opened contact 2KM3 and the counter-rotating that between described power supply U phase and power supply W phase, are serially connected with successively relay 2KM start warning light LD-1.
3. a kind of motor positive and inverse protective device according to claim 1 is characterized in that: described power supply U phase and power supply W be serially connected with successively between mutually relay 1KM normally-closed contact 1KM4, relay 2KM normally-closed contact 2KM4 and stop warning light LD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310295930XA CN103414162A (en) | 2013-07-15 | 2013-07-15 | Motor forward/reverse rotation protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310295930XA CN103414162A (en) | 2013-07-15 | 2013-07-15 | Motor forward/reverse rotation protection device |
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| CN103414162A true CN103414162A (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310295930XA Pending CN103414162A (en) | 2013-07-15 | 2013-07-15 | Motor forward/reverse rotation protection device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3551749A (en) * | 1966-12-15 | 1970-12-29 | Rotork Eng Co Ltd | Valve actuating mechanisms |
| CN2311889Y (en) * | 1996-10-18 | 1999-03-24 | 刘志华 | Controller for electric machine |
| CN2744064Y (en) * | 2004-07-26 | 2005-11-30 | 刘琼 | Controller for electric machine |
| CN201113876Y (en) * | 2007-09-29 | 2008-09-10 | 孙晓飞 | Oil pumping machine dedicated multi- power integral energy-saving actuator |
| CN202503465U (en) * | 2012-03-09 | 2012-10-24 | 成都思茂科技有限公司 | Clockwise and anticlockwise rotation controller for preventing false activation of motor |
| CN202550942U (en) * | 2012-03-01 | 2012-11-21 | 成都智利达科技有限公司 | Dual-interlocking clockwise and anticlockwise rotation motor controller |
| CN102916628A (en) * | 2012-10-24 | 2013-02-06 | 四川省电力公司达州电业局 | Motor control device |
| CN203367990U (en) * | 2013-07-15 | 2013-12-25 | 国家电网公司 | Motor forward and reverse rotation protection device |
-
2013
- 2013-07-15 CN CN201310295930XA patent/CN103414162A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3551749A (en) * | 1966-12-15 | 1970-12-29 | Rotork Eng Co Ltd | Valve actuating mechanisms |
| CN2311889Y (en) * | 1996-10-18 | 1999-03-24 | 刘志华 | Controller for electric machine |
| CN2744064Y (en) * | 2004-07-26 | 2005-11-30 | 刘琼 | Controller for electric machine |
| CN201113876Y (en) * | 2007-09-29 | 2008-09-10 | 孙晓飞 | Oil pumping machine dedicated multi- power integral energy-saving actuator |
| CN202550942U (en) * | 2012-03-01 | 2012-11-21 | 成都智利达科技有限公司 | Dual-interlocking clockwise and anticlockwise rotation motor controller |
| CN202503465U (en) * | 2012-03-09 | 2012-10-24 | 成都思茂科技有限公司 | Clockwise and anticlockwise rotation controller for preventing false activation of motor |
| CN102916628A (en) * | 2012-10-24 | 2013-02-06 | 四川省电力公司达州电业局 | Motor control device |
| CN203367990U (en) * | 2013-07-15 | 2013-12-25 | 国家电网公司 | Motor forward and reverse rotation protection device |
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Application publication date: 20131127 |