CN2098121U - Starting and speed regulator of wrapping asynchronous motor - Google Patents
Starting and speed regulator of wrapping asynchronous motor Download PDFInfo
- Publication number
- CN2098121U CN2098121U CN 91220790 CN91220790U CN2098121U CN 2098121 U CN2098121 U CN 2098121U CN 91220790 CN91220790 CN 91220790 CN 91220790 U CN91220790 U CN 91220790U CN 2098121 U CN2098121 U CN 2098121U
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- China
- Prior art keywords
- motor
- phase
- starting
- resistance
- speed regulation
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- 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.)
- Withdrawn
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- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a speed controller of motor. A resistor and a three-phase bidirectional thyristor circuit are connected in the rotor loop of a wrapping asynchronous motor, resistance-capacity phase shifting can make a control circuit connected with the rotor loop, the angle of flow of the silicon controlled is controlled to achieve control the value of the electric current of the rotor loop to achieve the purposes of reducing the surge current when the motor is started and achieve stepless speed regulation. The utility model has the advantages of simple structure, low cost, energy conservation and stable speed regulation performance; compared with resistor sectional type speed regulation wrapping motor, the efficiency is improved by 20%-50%, so the utility model can be widely used for the starting and stepless speed regulation of various large, medium and small power motors.
Description
The utility model relates to the starting and the speed regulating device of SPEED CONTROL OF MOTOR device, particularly a kind of wire wound asynchronous motor.
Wire wound asynchronous motor is widely used in industrial and mining enterprises, and its start mode is the quick resistance of serial connection frequency in rotor loop, or serial connection additional resistance segmentation starting and speed governing.Adopt quick resistance start motor frequently, defective is can not Fraquent start, and motor can not be with the heavy duty starting, rotor serial connection additional resistance segmentation starting and speed governing, the cost height, energy consumption is big, maintenance capacity is big, volume is big, floor space is big and can not continuous speed adjustment, can only the segmentation speed governing, limited the scope of application of motor, be the starting of solution wire wound asynchronous motor and the problem of speed governing, people have also developed some solutions.It is to connect the three-phase half controlled bridge circuit in the rotor loop as Chinese patent communique disclosed " application number 90220021 exchanges sliding ring type asynchronous machine stepless speed-regulating device ", electric current in the control rotor loop, reach the purpose of stepless speed regulation, but this device, after the controllable silicon copped wave changes the cycle that influences the three-phase alternating current in rotor loop owing to adopt the three-phase half controlled bridge circuit, the direct current composition is big, make big, the heating of motor oscillating, defective is big during use, is difficult to promote the use of.
The purpose of this utility model provides a kind of simple in structure, the starting of the wire wound asynchronous motor that speed adjusting performance is stable and speed regulating device.
The utility model is realized with following mode, the starting of wire wound asynchronous motor and speed regulating device, and it comprises the resistor R of Y-connection
1Connect the three-phase circuit of motor rotor, in the three-phase circuit of motor rotor, with resistor R
1And meet the bidirectional triode thyristor T of three-phase Y-connection and the capacitance-resistance phase-shift trigger control circuit of the three-phase Y-connection that constitutes by resistance, electric capacity, trigger impulse output meets bidirectional triode thyristor T through bidirectional diode CS the control utmost point, but control the angle of flow of two-way controllable silicon T, realize regulating the size of motor rotor loop three-phase current.
The utility model is that the rotor loop at wire wound asynchronous motor connects three-phase bidirectional triode thyristor and capacitance-resistance phase-shift trigger control circuit, the size of control motor rotor loop three-phase current, reach the impulse current when reducing electric motor starting and realize stepless speed regulation, it have simple in structure, cost is low, speed adjusting performance is stable, raise the efficiency 20-50% than winding motor with the resistor section variable speed energy saving, can be widely used as the energy-conservation starting and the bringing onto load stepless speed regulation of the dragging motor of various large, medium and small power.
Fig. 1 is the utility model circuit theory diagrams.
Below in conjunction with accompanying drawing the utility model is described in further detail:
In Fig. 1, the starting of wire wound asynchronous motor and speed regulating device are by the resistor R that is connected on the three-phase Y-connection in the motor rotor three-phase circuit
1And the three-phase bidirectional triode thyristor T that connects Y-connection constitutes, and the trigger control circuit of bidirectional triode thyristor T is by resistance R
2, adjustable resistance W
2And capacitor C
1And C
2Form electric bridge four arms, constitute a phase capacitance-resistance phase-shift trigger control circuit, as shown in Figure 1, two mid point a, b adjustable resistance W of electric bridge
1Connect, mid point a output pulse signal from electric bridge, connect the control utmost point of bidirectional triode thyristor through bidirectional diode CS, utilize forward and reverse breakover voltage of bidirectional diode CS to make the circuits for triggering conducting obtain trigger impulse, the angle of flow, the three-phase capacitance-resistance phase-shift trigger control circuit of control bidirectional triode thyristor are connected into Y-connection, be connected in the three-phase circuit of motor rotor, guarantee three-phase bidirectional triode thyristor T energy synchronous triggering, reach the size of current in control motor rotor loop, realize the purpose of starting and speed governing.Bidirectional triode thyristor T also is connected to resistance R
3The serial connection capacitor C
3The resistance-capacitance protection device.In the capacitance-resistance phase-shift trigger control circuit, adopting bridge circuit to constitute the capacitance-resistance phase shift is in order to increase phase shift range, because when the little angle of flow, in capacitor C
2Voltage behind band of last acquisition is given capacitor C
1Increase a charging circuit, make when the little angle of flow capacitor C
1On voltage can increase, to guarantee the reliable triggering and conducting of bidirectional triode thyristor.Increase adjustable range.Resistor R
1Be the inrush current that reduces motor when being used for electric motor starting, and when bidirectional triode thyristor T complete shut-down is disconnected, do not cause the rotor loop open circuit, the control circuit that stator connects of motor is the same with conventional control circuit.ZK mains switch, 3XC and 2XC are the forward and backward control contactors.RS is a fast acting fuse.BHQ is a comprehensive protector of motor, and LH is the current transformer in the rotor loop, is used for measuring and control.Power turn-on after the motor stator energized, is regulated adjustable resistance W
2Needs according to the starting time can make bidirectional triode thyristor disconnected to opening entirely from complete shut-down, make motor reach rated speed from minimum speed, thereby reach motor unsteady flow stepless starting, the torque of motor can be from the minimum speed to the rated speed, can keep breakdown torque always, in servicely can regulate adjustable resistance W arbitrarily
2Resistance, realize any rotating speed of motor, thereby realize the stepless speed regulation of motor.
The utility model also has the function of automatic feedback, during as the motor operate as normal, loads suddenly, and rotor coil voltage raise when rotor speed reduced, adjustable resistance W
2On voltage ratio also just raise, phase-shift circuit pulse phase shift forward, the angle of flow increases, short circuit current strengthens, and guarantees that rotating speed is constant.Can control heavy-duty motor, because controllable silicon is just controlled the rotor loop electric current, and rotor loop voltage is not high.The electric motor starting electric current is little, even can debug and have only rated operational current onesize, is a kind of starting and speed regulating device of desirable wire wound asynchronous motor.
Claims (1)
1, a kind of starting of wire wound asynchronous motor and speed regulating device, it comprises the resistor R of Y-connection
1Connect the three-phase circuit of motor rotor, it is characterized in that in the three-phase circuit of motor rotor, with resistor R
1And meet the bidirectional triode thyristor T of three-phase Y-connection and by resistance, the capacitance-resistance phase-shift trigger control circuit of the three-phase Y-connection that electric capacity constitutes, trigger impulse output connects the control utmost point of bidirectional triode thyristor T through bidirectional diode CS, the angle of flow of control bidirectional triode thyristor T, the size that realizes regulating motor rotor loop three-phase current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220790 CN2098121U (en) | 1991-09-02 | 1991-09-02 | Starting and speed regulator of wrapping asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220790 CN2098121U (en) | 1991-09-02 | 1991-09-02 | Starting and speed regulator of wrapping asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2098121U true CN2098121U (en) | 1992-03-04 |
Family
ID=4927841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91220790 Withdrawn CN2098121U (en) | 1991-09-02 | 1991-09-02 | Starting and speed regulator of wrapping asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2098121U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411295C (en) * | 2006-08-11 | 2008-08-13 | 邯郸钢铁股份有限公司 | Synchronization throwing method and device for coiling type asynchronous motor |
| CN101951210A (en) * | 2010-10-11 | 2011-01-19 | 刘辉 | Novel brushless ringless starter for wound rotor motor |
| CN102487260A (en) * | 2011-06-06 | 2012-06-06 | 梁佑芬 | Improvement of soft start major loop current limiting |
| WO2016015072A1 (en) | 2014-07-29 | 2016-02-04 | SIMA, Ewald | Closed-loop control and open-loop control of a single-phase or polyphase electromagnetic lathe |
| CN111669000A (en) * | 2019-03-08 | 2020-09-15 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
-
1991
- 1991-09-02 CN CN 91220790 patent/CN2098121U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411295C (en) * | 2006-08-11 | 2008-08-13 | 邯郸钢铁股份有限公司 | Synchronization throwing method and device for coiling type asynchronous motor |
| CN101951210A (en) * | 2010-10-11 | 2011-01-19 | 刘辉 | Novel brushless ringless starter for wound rotor motor |
| CN102487260A (en) * | 2011-06-06 | 2012-06-06 | 梁佑芬 | Improvement of soft start major loop current limiting |
| WO2016015072A1 (en) | 2014-07-29 | 2016-02-04 | SIMA, Ewald | Closed-loop control and open-loop control of a single-phase or polyphase electromagnetic lathe |
| CN111669000A (en) * | 2019-03-08 | 2020-09-15 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
| CN111669000B (en) * | 2019-03-08 | 2021-09-21 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |