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Inverter feed rotor multi three-phase winding asynchronous motor

An asynchronous motor and inverter technology, applied in asynchronous induction motors, DC motor speed/torque control, electrical components, etc., can solve the static and dynamic current sharing of power modules, poor utilization of power devices, and inverters. Reliability reduction and other problems, to achieve the effect of power dispersion, improved potential waveform, and improved reliability

Inactive Publication Date: 2005-12-07
ZHONGYUAN ENGINEERING COLLEGE
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AI Technical Summary

Problems solved by technology

[0002] Three-phase wound asynchronous motors can be used in metallurgy, coal mines, paper and machinery manufacturing and other industrial sectors to drive rolling mills, hoists, water pumps, fans, coal mills, electric / generator sets and other general machinery, conventional wound motors Speed ​​regulation generally adopts series resistance speed regulation, or cascade speed regulation method. This kind of speed regulation method belongs to changing slip speed regulation, and the speed regulation range is generally relatively small.
This will cause the reliability of the inverter to decrease and the static and dynamic current sharing problems of the power module. At the same time, the utilization rate of the power devices of the inverter will be relatively poor in the parallel state.

Method used

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  • Inverter feed rotor multi three-phase winding asynchronous motor
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  • Inverter feed rotor multi three-phase winding asynchronous motor

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Embodiment Construction

[0052] Instructions attached Figure 6-7 It is an embodiment of a multi-rotor three-phase motor. The power of the motor is 2000kW, the stator voltage is 6KV, and the rated speed of the motor is 495rpm. The stator winding of the motor is three-phase and directly connected to the power frequency grid, while the rotor winding has multiple groups of three-phase symmetrical windings that are independent on the circuit. The motor rotor wave winding structure is shown in Figure 5 . In the multi-phase system of the rotor, the winding connection diagram of the 4×3-phase rotor winding is adopted, and the winding adopts integer slots. It can be seen from the winding connection diagram that 4 sets of three-phase symmetrical windings are included in the 4×3-phase system. In this embodiment, the number of stator slots of the asynchronous motor powered by a three-phase inverter with wound rotors is Z=144, and the magnetic poles The number 2p=12, the number of slots per pole and each pha...

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Abstract

This invention refers to a more three-phase motor adopting inverter to supply power to rotor, which contains said rotor is three-phase and connected with electric network and has plurality of group of three-phase symmetry windings independent in circuit, there is only magnetic circuit coupling among groups without direction relation in electric circuit, the each star connected three-phase windings has independent zero point, the angle connected windings is independent, the total windings phases are multiple times of three, e.g. 2X3, 3X3,...NX3, the displacement angle can adopt 360 degree / (nX3), 180 degree / (nX3), or 0<=beta<180 degree / (nX3).

Description

Technical field: [0001] The invention relates to a winding rotor multi-three-phase inverter-powered asynchronous motor which adopts an inverter to supply power to the rotor winding. Background technique: [0002] Three-phase wound asynchronous motors can be used in metallurgy, coal mines, paper and machinery manufacturing and other industrial sectors to drive rolling mills, hoists, water pumps, fans, coal mills, electric / generator sets and other general machinery, conventional wound motors Speed ​​regulation generally adopts series resistance speed regulation, or cascade speed regulation method. This kind of speed regulation method belongs to changing slip speed regulation, and the speed regulation range is generally relatively small. If the wound motor adopts the stator side speed regulation, the power of the frequency converter must be greater than the power of the motor, especially the high-power wound motor is often a high-voltage motor, and its frequency converter also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/12
Inventor 王晓雷
Owner ZHONGYUAN ENGINEERING COLLEGE
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