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Rotor of asynchronous start permanent magnet motor and asynchronous start permanent magnet motor using the same

An asynchronous starting, permanent magnet motor technology, applied in starting devices, synchronous motors with static armatures and rotating magnets, and electric components, etc., can solve the problems of reducing starting torque, reducing the performance of permanent magnet motors, etc. The effect of improving starting torque, high starting torque and high efficiency

Active Publication Date: 2016-01-27
DANFOSS (TIANJIN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing asynchronous starting permanent magnet motor, there are following problems: in order to improve the starting torque, the performance (such as efficiency, power factor) when the permanent magnet motor is drawn into synchronous ability and stable operation will be reduced to a certain extent; Conversely, to improve the ability to pull in synchronously and the performance during steady operation, the starting torque will be reduced

Method used

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  • Rotor of asynchronous start permanent magnet motor and asynchronous start permanent magnet motor using the same
  • Rotor of asynchronous start permanent magnet motor and asynchronous start permanent magnet motor using the same
  • Rotor of asynchronous start permanent magnet motor and asynchronous start permanent magnet motor using the same

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no. 1 example

[0037] refer to figure 1 , shows the asynchronous start permanent magnet motor 20 according to the first embodiment of the present invention. The asynchronous start permanent magnet motor 20 includes a stator 21 and a rotor 24 , the rotor 24 is rotatably arranged in the stator 21 and is spaced from the stator 21 by a distance. Specifically, the rotor 24 is disposed in a cylindrical cavity inside the stator 21 . Preferably, said rotor 24 is arranged concentrically in said cylindrical cavity. The stator 21 is spaced apart from the rotor 24 by a distance d1.

[0038] see figure 2 , the stator 21 includes a cylindrical stator core 22, a plurality of stator teeth 29 extending inward along the radial direction of the stator 21, stator slots 23 distributed between the plurality of stator teeth 29, and Coils (not shown) are wound around the stator teeth 29 to generate a rotating magnetic field. Since the stator 21 is cylindrical, the stator 21 has an outer circumference 211 and ...

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Abstract

The invention provides a rotor of an asynchronous starting permanent magnet motor and an asynchronous starting permanent magnet motor using the rotor. The rotor for the asynchronous starting permanent magnet motor comprises a rotor iron core, a plurality of permanent magnet bodies which are arranged inside the rotor iron core at intervals along the circumference of the center of the rotor, and at least one magnetic flux switch which is arranged between two adjacent permanent magnet bodies and is close to the outer circumference of the rotor iron core, wherein by each magnetic flux switch, a magnetic flux loop between two adjacent permanent magnet bodies can be changed.

Description

technical field [0001] The invention relates to the field of permanent magnet motors, in particular to a rotor of an asynchronous start permanent magnet motor and an asynchronous start permanent magnet motor using the same. Background technique [0002] Generally, a permanent magnet motor such as a brushless DC motor has permanent magnets mounted on a rotor core to generate rotational driving force. Typically, a permanent magnet motor includes components such as a stator and a rotor, and end covers. The stator is the fixed part of the permanent magnet motor, which is used to generate the rotating magnetic field. It is mainly composed of stator core, stator winding and other components. The rotor is the rotating part of the permanent magnet motor. It is composed of rotor core, rotor winding and rotating shaft. Its function is to obtain the rotational torque under the action of the rotating magnetic field. [0003] Based on the arrangement of the windings in the rotor struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/14H02K1/27H02P6/20H02K11/20
Inventor 刘万振姚丽王震宇林岩
Owner DANFOSS (TIANJIN) CO LTD
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