CN103715674A - High-capacity-motor slow-starting protective device - Google Patents
High-capacity-motor slow-starting protective device Download PDFInfo
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- CN103715674A CN103715674A CN201210375180.2A CN201210375180A CN103715674A CN 103715674 A CN103715674 A CN 103715674A CN 201210375180 A CN201210375180 A CN 201210375180A CN 103715674 A CN103715674 A CN 103715674A
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Abstract
The invention discloses a high-capacity-motor slow-starting protective device which includes a motor, an AC power supply, a rectifying circuit, a bidirectional SCR, a unijunction transistor, a transformer, a sliding rheostat, a voltage-stabilizing tube, a fifth diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor. The protective device undergoes current limiting and voltage stabilization by the first resistor after being rectified by the rectifying circuit and then charges the high-capacity capacitors and delays gradual increasing of an opening angle of the bidirectional SCR by triggering pulses through discharge capacity of the sliding rheostat to the unijuction transistor. Even if the resistance of the sliding rheostat is adjusted to the minimum, the bidirectional SCR does not switch on completely immediately so that a soft-starting objective is achieved. Through adjustment of the sliding rheostat, soft starting speed of the motor can be changed. Through adoption of the soft starting, the high-capacity-motor slow-starting protective device is capable of limiting impulse current of a refrigeration motor so that motor burning is prevented, service life of the motor is prolonged and inconvenience brought to work by motor burning is reduced.
Description
Technical field
The present invention relates to a kind of Electric Machine Control apparatus, relate in particular to the slow starting protection device of a kind of high capacity motor.
Background technology
For heavy-duty motor, make the circuit of load, because power of motor is larger, resistance is low, and before unlatching, cold conditions resistance is lower, and electric motor starting electric current is very large, just starts and likely causes the phenomenon that burns out motor suddenly, and reduced the useful life of motor.
Summary of the invention
Object of the present invention provides a kind of high capacity motor slow starting protection device with regard to being in order to address the above problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes motor, AC power, rectification circuit, bidirectional thyristor, unijunction transistor, transformer, slide rheostat, voltage-stabiliser tube, the 5th diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first electric capacity and the second electric capacity, the input of described rectification circuit is connected with described AC power, and the positive pole of described rectification circuit is connected with the first end of described the first resistance, the second end while of described the first resistance and the negative pole of described voltage-stabiliser tube, the positive pole of described the 5th diode is connected with the first end of described the 5th resistance, the negative pole of described the 5th diode is connected with the first end of described the 3rd resistance with the first end of described the second resistance simultaneously, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance with the first end of described the first electric capacity simultaneously, the second end of described the 4th resistance is connected after described slide rheostat and is connected with the emitter of described unijunction transistor, the sliding end of described slide rheostat is connected with the first end of described the second electric capacity, the first base stage of described unijunction transistor is connected with the second end of described the 5th resistance, the second base stage of described unipolar transistor is connected with one end of the input side of described transformer, the other end while of the input side of described transformer and the second end of described the second electric capacity, the second end of described the first electric capacity, the second end of described the second resistance, the positive pole of described voltage-stabiliser tube is connected with the cathode output end of described rectification circuit, one end of the outlet side of described transformer is connected with the control end of described bidirectional thyristor, the other end of the outlet side of described transformer is connected with the first end of bidirectional thyristor and one end of described AC power simultaneously, and the second end of described bidirectional thyristor is connected with the other end of described AC power with after described motor series connection.
The present invention also comprises the 6th resistance, the 7th resistance, the 3rd electric capacity, the 4th electric capacity, the 6th diode and the 7th diode, the first end while of described the 6th resistance and the second end of described bidirectional thyristor, the first end of described the 3rd electric capacity is connected with the positive pole of described the 6th diode, the second end of the 3rd electric capacity described in the second end of described the 6th resistance, the negative pole of described the 6th diode, the first end of described the 7th resistance, the first end of described the 4th electric capacity is connected with the negative pole of described the 7th diode, the second end while of described the 7th resistance and the first end of described bidirectional thyristor, the second end of described the 4th electric capacity is connected with the positive pole of described the 7th diode.
Beneficial effect of the present invention is:
The present invention adopts soft start, can limit the impulse current of cool electric machine, can protect motor like this, avoids motor to be burned, and extends its useful life, has reduced motor and has burnt out the inconvenience bringing to work, thereby improved operating efficiency.
Accompanying drawing explanation
Accompanying drawing is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in drawings: the present invention includes AC power, rectification circuit, bidirectional thyristor SCR, unijunction transistor BT, transformer B, slide rheostat W, voltage-stabiliser tube DW, the 5th diode D5, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the first capacitor C 1 and the second capacitor C 2, the input of described rectification circuit is connected with described AC power, and the positive pole of described rectification circuit is connected with the first end of the first resistance R 1, the second end while of the first resistance R 1 and the negative pole of voltage-stabiliser tube DW, the positive pole of the 5th diode D5 is connected with the first end of the 5th resistance R 5, the negative pole of the 5th diode D5 is connected with the first end of the 3rd resistance R 3 with the first end of the second resistance R 2 simultaneously, the second end of the 3rd resistance R 3 is connected with the first end of the 4th resistance R 4 with the first end of the first capacitor C 1 simultaneously, after the second end series connection slide rheostat W of the 4th resistance R 4, be connected with the emitter of unijunction transistor BT, the sliding end of slide rheostat W is connected with the first end of the second capacitor C 2, the first base stage of unijunction transistor BT is connected with the second end of the 5th resistance R 5, the second base stage of unipolar transistor BT is connected with one end of the input side of transformer B, the other end while of the input side of transformer B and the second end of the second capacitor C 2, the second end of the first capacitor C 1, the second end of the second resistance R 2, the positive pole of voltage-stabiliser tube DW is connected with the cathode output end of rectification circuit, one end of the outlet side of transformer B is connected with the control end of bidirectional thyristor SCR, the other end of the outlet side of transformer B is connected with the first end of bidirectional thyristor SCR and one end of AC power simultaneously, and the second end of bidirectional thyristor SCR is connected with the other end of AC power with after motor M series connection.
As shown in drawings: the present invention also comprises the 6th resistance R 6, the 7th resistance R 7, the 3rd capacitor C 3, the 4th capacitor C 4, the 6th diode D6 and the 7th diode D7, the first end while of the 6th resistance R 6 and the second end of bidirectional thyristor SCR, the first end of the 3rd capacitor C 3 is connected with the positive pole of the 6th diode D6, the second end of the second end the 3rd capacitor C 3 of the 6th resistance R 6, the negative pole of the 6th diode D6, the first end of the 7th resistance R 7, the first end of the 4th capacitor C 4 is connected with the negative pole of the 7th diode D7, the second end while of the 7th resistance R 7 and the first end of bidirectional thyristor SCR, the second end of the 4th capacitor C 4 is connected with the positive pole of the 7th diode D7.
As shown in drawings: the present invention is by the first diode D1, the second diode D2, after the 3rd diode D3 and the 4th diode D4 rectification, pass through the first resistance R 1 current limliting, after voltage-stabiliser tube DW, large bulk capacitance C1 is charged, discharge capacity by slide rheostat W to single crystals brake tube BT, delaying trigger impulse progressively increases from small to large to bidirectional thyristor SCR turn-on angle, even the resistance of slide rheostat W is adjusted minimumly, bidirectional thyristor SCR is not full conducting immediately also, limited like this load current, thereby reach the object of soft start, regulate slide rheostat W can change the speed of motor M soft start.
Claims (2)
1. the slow starting protection device of high capacity motor, comprise motor, it is characterized in that: also comprise AC power, rectification circuit, bidirectional thyristor, unijunction transistor, transformer, slide rheostat, voltage-stabiliser tube, the 5th diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first electric capacity and the second electric capacity, the input of described rectification circuit is connected with described AC power, the positive pole of described rectification circuit is connected with the first end of described the first resistance, the second end while of described the first resistance and the negative pole of described voltage-stabiliser tube, the positive pole of described the 5th diode is connected with the first end of described the 5th resistance, the negative pole of described the 5th diode is connected with the first end of described the 3rd resistance with the first end of described the second resistance simultaneously, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance with the first end of described the first electric capacity simultaneously, the second end of described the 4th resistance is connected after described slide rheostat and is connected with the emitter of described unijunction transistor, the sliding end of described slide rheostat is connected with the first end of described the second electric capacity, the first base stage of described unijunction transistor is connected with the second end of described the 5th resistance, the second base stage of described unipolar transistor is connected with one end of the input side of described transformer, the other end while of the input side of described transformer and the second end of described the second electric capacity, the second end of described the first electric capacity, the second end of described the second resistance, the positive pole of described voltage-stabiliser tube is connected with the cathode output end of described rectification circuit, one end of the outlet side of described transformer is connected with the control end of described bidirectional thyristor, the other end of the outlet side of described transformer is connected with the first end of bidirectional thyristor and one end of described AC power simultaneously, the second end of described bidirectional thyristor is connected with the other end of described AC power with after described motor series connection.
2. heavy-duty motor soft start-up control device according to claim 1, it is characterized in that: also comprise the 6th resistance, the 7th resistance, the 3rd electric capacity, the 4th electric capacity, the 6th diode and the 7th diode, the first end while of described the 6th resistance and the second end of described bidirectional thyristor, the first end of described the 3rd electric capacity is connected with the positive pole of described the 6th diode, the second end of the 3rd electric capacity described in the second end of described the 6th resistance, the negative pole of described the 6th diode, the first end of described the 7th resistance, the first end of described the 4th electric capacity is connected with the negative pole of described the 7th diode, the second end while of described the 7th resistance and the first end of described bidirectional thyristor, the second end of described the 4th electric capacity is connected with the positive pole of described the 7th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375180.2A CN103715674A (en) | 2012-10-08 | 2012-10-08 | High-capacity-motor slow-starting protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375180.2A CN103715674A (en) | 2012-10-08 | 2012-10-08 | High-capacity-motor slow-starting protective device |
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| Publication Number | Publication Date |
|---|---|
| CN103715674A true CN103715674A (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210375180.2A Pending CN103715674A (en) | 2012-10-08 | 2012-10-08 | High-capacity-motor slow-starting protective device |
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| CN (1) | CN103715674A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848368A (en) * | 2016-06-01 | 2016-08-10 | 四川欧利普照明科技开发有限公司 | High-power LED lamp driving power supply |
| CN110683505A (en) * | 2019-09-22 | 2020-01-14 | 萧县华恒静电科技有限公司 | Intelligent preparation device based on PLC control |
| TWI717805B (en) * | 2019-08-14 | 2021-02-01 | 宏碁股份有限公司 | Power supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601638U (en) * | 2009-12-17 | 2010-10-06 | 张家港华捷电子有限公司 | Soft starter |
| CN202503755U (en) * | 2012-03-09 | 2012-10-24 | 成都思茂科技有限公司 | Controller for soft starting of high-power bulb |
| CN202713208U (en) * | 2012-08-24 | 2013-01-30 | 成都酷玩网络科技有限公司 | Soft start control device for high-power motor |
| CN103633886A (en) * | 2012-08-24 | 2014-03-12 | 成都酷玩网络科技有限公司 | Soft start control device for high-power motor |
-
2012
- 2012-10-08 CN CN201210375180.2A patent/CN103715674A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601638U (en) * | 2009-12-17 | 2010-10-06 | 张家港华捷电子有限公司 | Soft starter |
| CN202503755U (en) * | 2012-03-09 | 2012-10-24 | 成都思茂科技有限公司 | Controller for soft starting of high-power bulb |
| CN202713208U (en) * | 2012-08-24 | 2013-01-30 | 成都酷玩网络科技有限公司 | Soft start control device for high-power motor |
| CN103633886A (en) * | 2012-08-24 | 2014-03-12 | 成都酷玩网络科技有限公司 | Soft start control device for high-power motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848368A (en) * | 2016-06-01 | 2016-08-10 | 四川欧利普照明科技开发有限公司 | High-power LED lamp driving power supply |
| TWI717805B (en) * | 2019-08-14 | 2021-02-01 | 宏碁股份有限公司 | Power supply device |
| CN110683505A (en) * | 2019-09-22 | 2020-01-14 | 萧县华恒静电科技有限公司 | Intelligent preparation device based on PLC control |
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Application publication date: 20140409 |