CN202713208U - Soft start control device for high-power motor - Google Patents
Soft start control device for high-power motor Download PDFInfo
- Publication number
- CN202713208U CN202713208U CN 201220423574 CN201220423574U CN202713208U CN 202713208 U CN202713208 U CN 202713208U CN 201220423574 CN201220423574 CN 201220423574 CN 201220423574 U CN201220423574 U CN 201220423574U CN 202713208 U CN202713208 U CN 202713208U
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- diode
- electric capacity
- soft start
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Abstract
The utility model discloses a soft start control device for a high-power motor. The device comprises a motor, an alternating current power supply, a rectifying circuit, a bidirectional thyristor, a unijunction transistor, a transformer, a sliding rheostat, a voltage-regulator 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. According to the device provided by the utility model, after the rectifying circuit performs rectification, current limitation and voltage stabilization are performed through the first resistor, after that, the large-capacity capacitors are charged; trigger pulses enables gradually increased switch-on angle of the bidirectional thyristor, which can be delayed through the discharge quantity of the sliding rheostat to the unijunction transistor; and even if the resistance value of the sliding rheostat is adjusted to a minimum value, the bidirectional thyristor can not be conducted immediately, thereby achieving the purpose of soft start. The speed of the soft start of the motor can be changed through adjusting the sliding rheostat. With the soft start adopted, the soft start control device provided by the utility model can limit the surge current of a cold motor, prevent the motor from being burned out, prolong the service life of the motor and alleviate inconvenience in work caused by the burning of the motor.
Description
Technical field
The utility model relates to a kind of Electric Machine Control apparatus, relates in particular to a kind of heavy-duty motor soft start-up control device of using.
Background technology
Make the circuit of load for heavy-duty motor, because power of motor is larger, resistance is low, and before unlatching, the cold conditions resistance is lower, and the electric motor starting electric current is very large, starts suddenly and just might cause the phenomenon that burns out motor, and reduced the useful life of motor.
Summary of the invention
The purpose of this utility model provides a kind of heavy-duty motor soft start-up control device with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises 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, 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 be connected the first end of the 5th resistance and connect, the negative pole of described the 5th diode simultaneously with the first end of described the second resistance be connected the first end of the 3rd resistance and be connected, the second end of described the 3rd resistance simultaneously with the first end of described the first electric capacity be connected the first end of the 4th resistance and be connected, the second end of described the 4th resistance is connected and is connected with the emitter of described unijunction transistor behind the described slide rheostat, 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 an 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 be connected the cathode output end of rectification circuit and connect, 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 simultaneously with the first end of bidirectional thyristor be connected an end of AC power and be connected, the second end of described bidirectional thyristor is connected with described motor and is connected with the other end of described AC power afterwards.
The utility model 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 be connected the positive pole of the 6th diode and connect, the second end of described the 3rd electric capacity of 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 be connected the negative pole of the 7th diode and connect, the second end of described the 7th resistance is simultaneously and the first end of described bidirectional thyristor, the second end of described the 4th electric capacity be connected the positive pole of the 7th diode and connect.
The beneficial effects of the utility model are:
The utility model adopts soft start, can limit the impulse current of cool electric machine, can protect motor like this, avoids motor to be burned, and prolongs its useful life, has reduced motor and has burnt out the inconvenience that brings to work, thereby improved operating efficiency.
Description of drawings
Accompanying drawing is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in drawings: the utility model comprises 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, 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 first end of the positive pole of the 5th diode D5 and the 5th resistance R 5 connects, the negative pole of the 5th diode D5 is connected with the first end of the second resistance R 2 and the first end of the 3rd resistance R 3 simultaneously, the second end of the 3rd resistance R 3 is connected with the first end of the first capacitor C 1 and the first end of the 4th resistance R 4 simultaneously, be connected with the emitter of unijunction transistor BT behind the second end series connection slide rheostat W of the 4th resistance R 4, 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 an 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 cathode output end and is connected with 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 simultaneously and the first end of bidirectional thyristor SCR be connected an end with AC power and be connected, the second end of bidirectional thyristor SCR is connected with motor M and is connected with the other end of AC power afterwards.
As shown in drawings: the utility model 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 positive pole of the first end of the 3rd capacitor C 3 and the 6th diode D6 connects, 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 negative pole of the first end of the 4th capacitor C 4 and the 7th diode D7 connects, the second end while of the 7th resistance R 7 and the first end of bidirectional thyristor SCR, the positive pole of the second end of the 4th capacitor C 4 and the 7th diode D7 connects.
As shown in drawings: the utility model is by the first diode D1, the second diode D2, pass through the first resistance R 1 current limliting after the 3rd diode D3 and the 4th diode D4 rectification, behind the voltage-stabiliser tube DW large bulk capacitance C1 is charged, by the discharge capacity of 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 transfer the resistance of slide rheostat W minimumly, bidirectional thyristor SCR is not immediately full conducting also, limited like this load current, thereby reach the purpose of soft start, regulate the speed that slide rheostat W can change the motor M soft start.
Claims (2)
1. heavy-duty motor soft start-up control device, 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 be connected the first end of the 5th resistance and connect, the negative pole of described the 5th diode simultaneously with the first end of described the second resistance be connected the first end of the 3rd resistance and be connected, the second end of described the 3rd resistance simultaneously with the first end of described the first electric capacity be connected the first end of the 4th resistance and be connected, the second end of described the 4th resistance is connected and is connected with the emitter of described unijunction transistor behind the described slide rheostat, 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 an 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 be connected the cathode output end of rectification circuit and connect, 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 simultaneously with the first end of bidirectional thyristor be connected an end of AC power and be connected, the second end of described bidirectional thyristor is connected with described motor and is connected with the other end of described AC power afterwards.
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 be connected the positive pole of the 6th diode and connect, the second end of described the 3rd electric capacity of 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 be connected the negative pole of the 7th diode and connect, the second end of described the 7th resistance is simultaneously and the first end of described bidirectional thyristor, the second end of described the 4th electric capacity be connected the positive pole of the 7th diode and connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423574 CN202713208U (en) | 2012-08-24 | 2012-08-24 | Soft start control device for high-power motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423574 CN202713208U (en) | 2012-08-24 | 2012-08-24 | Soft start control device for high-power motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713208U true CN202713208U (en) | 2013-01-30 |
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ID=47593470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220423574 Expired - Fee Related CN202713208U (en) | 2012-08-24 | 2012-08-24 | Soft start control device for high-power motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202713208U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103715674A (en) * | 2012-10-08 | 2014-04-09 | 四川金信石信息技术有限公司 | High-capacity-motor slow-starting protective device |
-
2012
- 2012-08-24 CN CN 201220423574 patent/CN202713208U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103715674A (en) * | 2012-10-08 | 2014-04-09 | 四川金信石信息技术有限公司 | High-capacity-motor slow-starting protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20130824 |