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Rotor of permanent magnetic composite excitation synchronous motor

A synchronous motor and excitation technology, which is applied to the rotating parts of the magnetic circuit, the shape/style/structure of the magnetic circuit, etc., can solve the problems of the temperature of the motor, increase the difficulty of motor control, and affect the best performance of the motor.

Active Publication Date: 2014-12-24
ZHEJIANG LOONGSON ELECTRIC DRIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the motor system, the temperature change will cause the excitation temperature of the motor to increase, which increases the difficulty of motor control and affects the best performance of the motor.

Method used

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  • Rotor of permanent magnetic composite excitation synchronous motor
  • Rotor of permanent magnetic composite excitation synchronous motor

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Experimental program
Comparison scheme
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Embodiment

[0020] Such as figure 1 As shown, the permanent magnet composite excitation synchronous motor rotor of the present invention includes a double-layer embedded rotor punching piece 100. A first magnetic steel groove 200 is provided on the outer side of the rotor punching piece 100. A second magnetic steel groove 300 is arranged on the inner side of the punching piece 100, a magnetic bridge is arranged between the second magnetic steel grooves 300, and a magnetic steel is arranged in the first magnetic steel groove 200 and the second magnetic steel groove 300. .

[0021] In this embodiment, for different stator structures, the outer first magnetic steel grooves 200 allow different shapes, and the first magnetic steel grooves 200 are arranged in a V shape (such as figure 1 Shown), suitable for distributed winding stator; or the first magnetic steel slot 200 is arranged in a straight line (such as figure 2 Shown), suitable for concentrated winding stator.

[0022] In this embodiment, ...

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Abstract

The invention aims at disclosing a rotor of a permanent magnetic composite excitation synchronous motor. The rotor comprises a double-layer embedded type rotor sheet, first magnetic steel grooves are formed in the outer side of the rotor sheet, second magnetic steel grooves are formed in the inner side of the rotor sheet, magnetic bridges are arranged between the second magnetic steel grooves, and magnetic steel is arranged in the first magnetic steel grooves and the second magnetic steel grooves. Compared with the prior art, different permanent materials are embedded in the rotor sheet according to a certain rule to form the rotor, the usage number of rare-earth permanent magnetic materials is effectively reduced, the effect of the temperature on a motor air-gap magnetic field is reduced, the excitation stability is improved, the utilization rate of salient pole torque of the motor is increased, the torque density of the motor is increased, and the purpose of the rotor is achieved.

Description

Technical field [0001] The invention relates to a motor rotor, in particular to a permanent magnet composite excitation synchronous motor rotor. Background technique [0002] Permanent magnet synchronous motors have the advantages of high power density, high efficiency, wide speed range and hard mechanical characteristics. However, high-performance permanent magnet synchronous motors require high-grade rare earth permanent magnet materials to be realized. Generally, the more permanent magnet materials are used Larger, the higher the power density of the motor. In addition, in order to ensure the reliable operation of the motor, the thickness of the magnetic steel must meet the requirements of the armature response of the motor in the worst case. [0003] At present, there are mainly two types of magnetic steel materials for permanent magnet motors on the market: neodymium iron boron and ferrite. The price of NdFeB is 20 to 100 times that of ferrite, and its magnetic energy produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
Inventor 袁沛海
Owner ZHEJIANG LOONGSON ELECTRIC DRIVE TECH CO LTD
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