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Combination compensated type wound rotor asynchronous machine

A technology for asynchronous motors and wound rotors, which is applied in the manufacture of motor generators, electrical components, electromechanical devices, etc., and can solve the problems of complex starting devices and large power consumption

Active Publication Date: 2008-07-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the motor of the heavy-duty starting equipment needs to be connected with a frequency-sensitive rheostat in its winding rotor circuit when starting, the power consumption caused by it is relatively large and its starting device is relatively complicated due to its matching with a starting rheostat and a switching switch. Provide a combined compensation type wound rotor asynchronous motor

Method used

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  • Combination compensated type wound rotor asynchronous machine
  • Combination compensated type wound rotor asynchronous machine

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1 (as shown in Figure 1)

[0014] Combined compensation type wound rotor asynchronous motor, including stator windings and rotor windings. The stator windings are connected into two or three groups of three-phase windings. At least two groups of three-phase windings are connected to have three compensation terminals whose potential value is close to zero. O 1 , O 2 , O 3 Combination wiring, its three compensation terminals O 1 , O 2 , O 3 Through switch K4 and the rotor winding W in star connection 01 -W 02 -W 03 The three wire ends are connected, and the rotor winding W 01 -W 02 -W 03 The three wire ends of is connected to a switch group K5 consisting of three switches in star connection. Switch K4 and switch group K5 adopt AC contactors.

[0015] In this embodiment, the stator windings are connected into three groups of three-phase windings Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -Wc 2 , Wa 3 -Wb 3 -Wc 3 , Two sets of three-phase winding Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -Wc 2 ...

Embodiment 2

[0020] Example 2 (as shown in Figure 2)

[0021] Combined compensation type wound rotor asynchronous motor, including stator windings and rotor windings. The stator windings are connected into two or three groups of three-phase windings. At least two groups of three-phase windings are connected to have three compensation terminals whose potential value is close to zero. O 1 , O 2 , O 3 Combination wiring, its three compensation terminals O 1 , O 2 , O 3 Through switch K4 and the rotor winding W in star connection 01 -W 02 -W 03 The three wire ends are connected, and the rotor winding W 01 -W 02 -W 03 The three wire ends of is connected to a switch group K5 consisting of three switches in star connection. Switch K4 and switch group K5 adopt AC contactors.

[0022] In this embodiment, the stator windings are connected into three groups of three-phase windings Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -Wc 2 , Wa 3 -Wb 3 -Wc 3 , Three groups of three-phase winding Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -W...

Embodiment 3

[0025] Combined compensation type wound rotor asynchronous motor, including stator windings and rotor windings. The stator windings are connected into two or three groups of three-phase windings. At least two groups of three-phase windings are connected to have three compensation terminals whose potential value is close to zero. O 1 , O 2 , O 3 Combination wiring, its three compensation terminals O 1 , O 2 , O 3 Through switch K4 and the rotor winding W in star connection 01 -W 02 -W 03 The three wire ends are connected, and the rotor winding W 01 -W 02 -W 03 The three wire ends of is connected to a switch group K5 consisting of three switches in star connection. Switch K4 and switch group K5 adopt AC contactors.

[0026] In this embodiment, the stator windings are connected into two groups of three-phase windings Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -Wc 2 , Two sets of three-phase winding Wa 1 -Wb 1 -Wc 1 , Wa 2 -Wb 2 -Wc 2 Connected to have three compensation terminals O whose potentia...

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Abstract

The invention relates to a motor, in particular to a combining compensating type winding rotor asynchronous motor, which solves the problem that the motor of a heavy loaded device needs connecting a frequency-sensitive rheostat in winding rotor return circuit when the heavy loaded device is started, electric energy consumption is larger and a starting device is complex which is caused by the matching starting rheostat and a change-over switch. The invention comprises a stator winding and a rotor winding, the stator winding is connected into two groups or three groups three phases windings, at least two groups three phase windings are connected into a combining wiring which is provided with three compensating ends whose electric potential value is closed to zero, the three compensating ends are connected with three wiring ends of the rotor winding which takes star shape connection, and a switch group which is formed by three switches which take star shape connection is connected with the three wire ends of the rotor winding which take star shape connection. The invention avoids tedious property of the matching starting rheostat of winding rotor asynchronous motor, utilizes bending connection and the inner compensating function of a bridging condenser, and generates distinctive electricity saving effect in normal running.

Description

Technical field [0001] The invention relates to a motor, in particular to a combined compensation type wound rotor asynchronous motor. Background technique [0002] When the rotor circuit of the wound rotor asynchronous motor is connected in series with different resistances, its critical torque remains unchanged, and the critical slip changes in proportion to the external resistance. In the current technology, for the heavy-duty starting equipment of ball mills, the frequency-sensitive rheostat is connected to the winding rotor circuit to carry out the heavy-load starting of the motor. After the starting is completed, the rotor windings are placed at the collector ring and carbon brush. Short-circuit and enter normal operation. Because this kind of motor has a relatively high number of poles and needs to be equipped with a starting varistor, its lower power factor leads to greater power consumption, and its starting device is more complicated due to its matching with a starting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K15/085
Inventor 刘建平刘涛殷新文刘静
Owner STATE GRID CORP OF CHINA
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