CN203326945U - Automatic control device capable of reducing speed, increasing torque and limiting current of electric motor - Google Patents
Automatic control device capable of reducing speed, increasing torque and limiting current of electric motor Download PDFInfo
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- CN203326945U CN203326945U CN2013201790639U CN201320179063U CN203326945U CN 203326945 U CN203326945 U CN 203326945U CN 2013201790639 U CN2013201790639 U CN 2013201790639U CN 201320179063 U CN201320179063 U CN 201320179063U CN 203326945 U CN203326945 U CN 203326945U
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Abstract
The utility model relates to an automatic control device capable of reducing the speed, increasing the torque and limiting the current of an electric motor, and belongs to the technical field of electric motor drive control. The automatic control device is characterized in that: four groups of resistors, which are enough in capacity and unequal in resistance, are correspondingly connected to a three-phase current loop of a winding type electric motor rotor in series, three resistors in each of the groups are equal in resistance, the head ends of the three resistors in each group are in short circuit connection by using a short circuit switch, the tail ends of the three resistors in the last group are connected into star points, a speed sensor is installed on a brush bracket of the electric motor rotor, a power supply and a signal line of the speed sensor are connected with a controller, the upper end of a power switch of the controller is connected to an AC220V power supply, the lower end of the power switch of the controller is connected with the controller, the controller receives rotating speed information inputted by the speed sensor, carries out signal amplification programming, determines the rated speed corresponding to a main electric motor, developing four programs so as to respectively control the four short circuit switches to open or close timely, thereby regulating the resistance and the power consumption of the current loop of the electric motor rotor, limiting the starting current of the electric motor, increasing the starting torque of the electric motor, and enabling stable soft start of the electric motor to be successful. In addition, the automatic control device can regulate automatically when the speed is reduced and the working current rises because of overload in running of the electric motor, thereby limiting overload current of the electric motor, and increasing the operation torque of the electric motor.
Description
Technical field
The utility model relates to a kind of motor deceleration and increases square current limliting automatic control equipment, and in order to resistance value and the power consumption in automatic adjusting wound-rotor motor rotor current loop, when motor starting, the restriction starting current, increase starting torque; In service at motor, because causing motor speed, traffic overload descends, and when running current raises, energy volitional check overload current, increase the operation torque.Belong to motor run control technology field.
Background technology
At present, multiple loading moment changes frequent equipment greatly, as winch, large-scale hoister, sand-digging machine, general adapted wound-rotor motor is power, mostly adopt the many groups of series winding resistance in the rotor current loop of wound-rotor motor, form a plurality of gears, shifted gears by manual operations, it is high to the skills involved in the labour requirement of operation, and operation labour intensity is large; Also having miscellaneous equipment in addition is power as ball mill, disintegrating machine adapted wound-rotor motor; be generally, after wound-rotor motor has started, directly the rotor coil short circuit to be become to asterism, can not shift gears during work; if charging is irregular; suddenly charging is too much, causes motor moment inadequate, and rotating speed descends; stall even; operating current rises sharply, and to equipment being damaged or the trip protection shutdown, brings great maintenance workload.
Summary of the invention
The purpose of this utility model is exactly for above-mentioned deficiency, provide a kind of motor deceleration to increase square current limliting automatic control equipment, in order to resistance and the power consumption in automatic adjusting wound-rotor motor rotor current loop, when motor starting, the restriction starting current, increase starting torque; In service at motor, because causing electronic motor-driven rotating speed, traffic overload descends, and when electric current raises, energy volitional check overload current, increase the operation torque.
The technical solution of the utility model is: described a kind of motor deceleration increases square current limliting automatic control equipment, it is characterized in that: by the corresponding connection of rotor leading-out wire of three resistance head ends with the main motor (M) of the 1st group of resistance (R1), simultaneously by shorting switch 1(K1) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 2nd group of resistance (R2) of the 1st group of resistance (R1), simultaneously by shorting switch 2(K2) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 3rd group of resistance (R3) of the 2nd group of resistance (R2), simultaneously by shorting switch 3(K3) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 4th group of resistance (R4) of the 3rd group of resistance (R3), simultaneously by shorting switch 4(K4) and be connected in therebetween, 3 resistance tail ends of the 4th group of resistance (R4) are connected into to asterism, speed probe (4) is arranged on the brush holder of main motor (M) rotor, the power supply of speed probe (4) and holding wire are connected with controller (2), the upper termination AC220V power supply of controller power source switch (3), controller power source switch (3) lower end is connected with controller (2), controller (2) receives the rotary speed information of speed probe (4) input, control respectively shorting switch 1(K1), shorting switch 2(K2), shorting switch 3(K3), shorting switch 4(K4) four shorting switchs disconnect or closure in good time, to regulate resistance value and the power consumption in the motor rotor current circuit, and the starting of restrictions motor or overload current, the starting of increasing motor or operation torque.
The utility model has following advantage:
1, this device not only has the wound-rotor motor soft start function, and in service at motor, because traffic overload causes motor speed, descends, and when running current raises, the overload current of energy volitional check motor, increase the operation torque;
2, processing ease, operation labour intensity is low;
3, be not subject to the impact in environment for use and temperature and geographical position;
4, simple in structure, easily to manufacture, maintenance technology is understandable easy, and maintenance cost is low;
5, safe and reliable to operation, long service life, overload capacity is strong.
The accompanying drawing explanation:
Fig. 1 is that the utility model is executed routine electrical structure schematic diagram;
In figure, the member name of each figure number is called: 1, main power switch 2, controller 3, controller power source switch 4, speed probe R1, the 1st group of resistance R 2, the 2nd group of resistance R 3, the 3rd group of resistance R 4, the 4th group of resistance K1, shorting switch 1 K2, shorting switch 2 K3, shorting switch 3 K4, shorting switch 4 M, main motor.
The explanation of the utility model structure, and operation principle explanation: structure explanation (see figure 1), the corresponding connection of rotor leading-out wire by the head end of three resistance of the 1st group of resistance (R1) with main motor (M), simultaneously by shorting switch 1(K1) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 2nd group of resistance (R2) of the 1st group of resistance (R1), simultaneously by shorting switch 2(K2) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 3rd group of resistance (R3) of the 2nd group of resistance (R2), simultaneously by shorting switch 3(K3) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 4th group of resistance (R4) of the 3rd group of resistance (R3), simultaneously by shorting switch 4(K4) and be connected in therebetween, three resistance tail ends of the 4th group of resistance (R4) are connected into to asterism, speed probe (4) is arranged on the brush holder of main motor (M) rotor, the power supply of speed probe (4) and holding wire are connected with controller (2), the upper termination AC220V power supply of controller power source switch (3), controller power source switch (3) lower end is connected with controller (2), operation principle explanation (see figure 1), the operation principle of this device is, the resistance of four groups of enough capacities of series winding access in wound-rotor motor rotor current loop, can reduce starting current or the overload current of motor, resistance heating can consume the power in wound-rotor motor rotor current loop, the turning moment of energy increasing motor, when design serial resistance capacity and resistance, consider total resistance of series winding access resistance in the motor rotor current circuit, can be when motor work stall, 1 times of left and right that the restrictions motor stator current is the motor rated current, the operation principle of controller (2) is, controller (2) receives the rotary speed information of speed probe (4) input, carry out signal and amplify programming, determine rated speed corresponding to main motor (M), work out four programs, a, rotating speed is at rated speed closed shorting switch 1(K1 more than 95%), rotating speed disconnects shorting switch 1(K1 below 95% in rated speed), b, rotating speed is at rated speed closed shorting switch 2(K2 more than 90%), rotating speed disconnects shorting switch 2(K2 below 90% in rated speed), c, rotating speed is at rated speed closed shorting switch 3(K3 more than 85%), rotating speed disconnects shorting switch 3(K3 below 85% in rated speed), d, rotating speed is at rated speed closed shorting switch 4(K4 more than 65%), rotating speed disconnects shorting switch 4(K4 below 65% in rated speed).
Embodiment
By reference to the accompanying drawings and execute the example the utility model is described as follows:
Fig. 1 is one of the present utility model and executes example, connect controller power source switch (3), controller (2) enters operating state, main power switch (1) manually closes, main motor (M) starts slowly running, rotating speed rises gradually, 1 times of left and right that now starting current of main motor (M) is its rated current, when rise of rotational speed arrives rated speed more than 65%, controller (2) is controlled shorting switch 4(K4) closure, the 4th group of resistance (R4) becomes bypass, rotating speed continues to rise, circulate progressive, controller (2) continues to control shorting switch 3(K3), shorting switch 2(K2), shorting switch 1(K1) corresponding auto-closing successively, as shorting switch 1(K1) after closure, all resistance becomes bypass entirely, main motor (M) runs well, start successfully, and reached the effect of soft start success, when motor runs well, as ball mill, disintegrating machine, if charging is irregular, suddenly charging is too much, cause motor torque inadequate, rotating speed descends, stall even, when rotating speed drops to rated speed 95% when following, controller (2) is controlled shorting switch 1(K1 automatically) disconnect, the 1st group of resistance (R1) is contacted accesses the rotor current loop, when if rotating speed intermittently drops to the programme controlled corresponding rotating speed of controller (2), controller (2) can be controlled shorting switch 2(K2), shorting switch 3(K3), shorting switch 4(K4) automatic disconnection successively, by the 2nd group of resistance (R2), the 3rd group of resistance (R3), the 4th group of resistance (R4), successively in series winding access rotor current loop, progressively increase the turning moment of motor, the limiting overload Current rise, unlikely equipment breaking-up or the trip protection of making shut down, while running well as winch, large-scale hoister, can easily extract be put down, during perhaps by the weight traction enhancement, the rated speed torque is inadequate, can make rotating speed descend, when dropping to the programme controlled corresponding rotating speed of controller (2), controller (2) can automatically be controlled and disconnect 1 or several shorting switchs, to increase by 1 group or several groups of resistance, and the turning moment of increasing motor, the limiting overload electric current, need not the manual operation gearshift.
Claims (1)
1. a motor deceleration increases square current limliting automatic control equipment, it is characterized in that: by the corresponding connection of rotor leading-out wire of three resistance head ends with the main motor (M) of the 1st group of resistance (R1), simultaneously by shorting switch 1(K1) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 2nd group of resistance (R2) of the 1st group of resistance (R1), simultaneously by shorting switch 2(K2) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 3rd group of resistance (R3) of the 2nd group of resistance (R2), simultaneously by shorting switch 3(K3) and be connected in therebetween, the corresponding connection of three resistance head ends by three resistance tail ends with the 4th group of resistance (R4) of the 3rd group of resistance (R3), simultaneously by shorting switch 4(K4) and be connected in therebetween, 3 resistance tail ends of the 4th group of resistance (R4) are connected into to asterism, speed probe (4) is arranged on the brush holder of main motor (M) rotor, the power supply of speed probe (4) and holding wire are connected with controller (2), the upper termination AC220V power supply of controller power source switch (3), controller power source switch (3) lower end is connected with controller (2), controller (2) receives the rotary speed information of speed probe (4) input, control respectively shorting switch 1(K1), shorting switch 2(K2), shorting switch 3(K3), shorting switch 4(K4) four shorting switchs disconnect or closure in good time, to regulate resistance value and the power consumption in the motor rotor current circuit, and the starting of restrictions motor or overload current, the starting of increasing motor or operation torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201790639U CN203326945U (en) | 2013-04-11 | 2013-04-11 | Automatic control device capable of reducing speed, increasing torque and limiting current of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201790639U CN203326945U (en) | 2013-04-11 | 2013-04-11 | Automatic control device capable of reducing speed, increasing torque and limiting current of electric motor |
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| Publication Number | Publication Date |
|---|---|
| CN203326945U true CN203326945U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201790639U Expired - Fee Related CN203326945U (en) | 2013-04-11 | 2013-04-11 | Automatic control device capable of reducing speed, increasing torque and limiting current of electric motor |
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| CN (1) | CN203326945U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406772A (en) * | 2015-12-22 | 2016-03-16 | 鞍钢电气有限责任公司 | Universal soft-start device for wire winding type and cage type asynchronous motors and using method |
| CN112716024A (en) * | 2021-01-15 | 2021-04-30 | 青岛海信日立空调系统有限公司 | Drying machine |
-
2013
- 2013-04-11 CN CN2013201790639U patent/CN203326945U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406772A (en) * | 2015-12-22 | 2016-03-16 | 鞍钢电气有限责任公司 | Universal soft-start device for wire winding type and cage type asynchronous motors and using method |
| CN105406772B (en) * | 2015-12-22 | 2017-11-21 | 鞍钢电气有限责任公司 | For winding-type and the general soft starting device and application method of squirrel cage induction motor |
| CN112716024A (en) * | 2021-01-15 | 2021-04-30 | 青岛海信日立空调系统有限公司 | Drying machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN KETAI ELECTRIC CO., LTD. Free format text: FORMER OWNER: XIE YOUSHEN Effective date: 20140310 Free format text: FORMER OWNER: XIE ZHENHUAN Effective date: 20140310 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 410008 CHANGSHA, HUNAN PROVINCE TO: 410000 CHANGSHA, HUNAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140310 Address after: 410000, 4 floor, Hunan Electrical Research Institute, building 004, Xin Zhong Road, Tianxin District, Changsha, Hunan Patentee after: Hunan Ketai Electric Co., Ltd. Address before: 410008 Hunan province Changsha Kaifu District Gongnong Street No. 144 Patentee before: Xie Youshen Patentee before: Xie Zhenhuan |
|
| ASS | Succession or assignment of patent right |
Owner name: XIE YOUSHEN Free format text: FORMER OWNER: HUNAN KETAI ELECTRIC CO., LTD. Effective date: 20150722 Owner name: XIE ZHENHUAN Effective date: 20150722 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150722 Address after: 410008 Hunan province Changsha Kaifu District Gongnong Street No. 144 Patentee after: Xie Youshen Patentee after: Xie Zhenhuan Address before: 410000, 4 floor, Hunan Electrical Research Institute, building 004, Xin Zhong Road, Tianxin District, Changsha, Hunan Patentee before: Hunan Ketai Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20160411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |