Double-stator permanent magnet synchronous motor adopting asynchronous starting

Abstract

The invention discloses a double-stator permanent magnet synchronous motor adopting asynchronous starting. The double-stator permanent magnet synchronous motor comprises a starting stator core, a starting stator winding, a steady stator core, a steady stator winding, a rotor core, a rotor cage and a permanent magnet, wherein the rotor core is located between the starting stator core and the steadystator core, and the permanent magnet is arranged on the rotor core; when the motor is started, the starting stator winding is accessed to a power grid and acts with the rotor cage to supply startingtorque to the motor; after the motor is pulled into synchronism, the steady stator winding is accessed to the power grid and acts with the permanent magnet; when the motor operates in a steady state,the starting stator winding is disconnected with the power grid, and the steady stator winding acts with the permanent magnet to supply average torque to the motor. The problem of mutual restrictionof starting performance and steady-state performance of the permanent magnet synchronous motor adopting asynchronous starting can be solved effectively, and the permanent magnet is prevented from demagnetizing due to larger current flowing in the starting stage of the motor.

Description

technical field [0001] The invention belongs to the field of asynchronous starting permanent magnet synchronous motors, and more specifically relates to a double-stator asynchronous starting permanent magnet synchronous motor. Background technique [0002] Electric motors are widely used in the industrial field, and the motor system accounts for as much as 60% of industrial electricity consumption. Improving the energy efficiency of the motor system is of great significance to energy saving and environmental protection. Compared with traditional asynchronous motors, asynchronous start permanent magnet synchronous motors (also known as self-starting permanent magnet synchronous motors) have the advantages of small size, light weight, high efficiency in a wide load range, and high power factor. The working state of the asynchronous start permanent magnet synchronous motor can be divided into two states: asynchronous start and synchronous steady state operation. [0003] The e...

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Problems solved by technology

[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides a double-stator asynchronous start permanent magnet synchronous motor. Provide average torque to solve the problem of mutual restriction between starting performance and steady-state performance in asynchronous starting permanent magnet synchronous motors

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