Rotor plate of highly effective permanent magnetism synchronous motor

A permanent magnet synchronous motor, rotor punching technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problems of increasing motor vibration and noise, increasing motor loss, affecting motor magnetic density, etc. , to achieve the effect of reducing temperature rise and noise, reducing harmonic content, and reducing additional losses

Inactive Publication Date: 2007-09-19
SHANGHAI MARITIME UNIVERSITY
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  • Claims
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Problems solved by technology

On the one hand, the sinusoidal distortion rate of the air-gap flux density waveform of the permanent magnet synchronous motor is high, resulting in a large number of harmonics that affect the performance of the motor, increasing the loss of the motor, and increasing the vibration and noise of the motor; on the other hand, for For permanent magnet synchronous motors with small power, due to the small size of the punching sheet, the size of the magnetic steel groove is limited, so that the magnetic steel that can be placed is also small, which affects the magnetic density of the motor, thus affecting the power density of the motor and the size of the motor. The starting performance of the

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  • Rotor plate of highly effective permanent magnetism synchronous motor
  • Rotor plate of highly effective permanent magnetism synchronous motor

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Embodiment approach

[0013] Disclosed is a rotor punch of a high-efficiency permanent magnet synchronous motor. The rotor slots have two sizes: one is a common slot (1), and the other is a shallow slot (3). These two grooves have different depths, and the ratio of the shallow groove (3) to the common groove (1) is between 0.6 and 0.95. The number of shallow grooves is related to the number of magnetic steel grooves, which is twice the number of magnetic steel grooves.

[0014] A non-uniform magnetic steel groove (2) is opened on the rotor punch. The side of the non-uniform magnetic steel groove close to the center of the circle is a straight line, and the other side is an arc or two broken lines; or both sides are arcs. The width of the non-uniform magnetic steel slot varies everywhere, and the width (4) is the narrowest in the middle, and the width (5) is the largest at both ends. The ratio of the width (4) at the narrowest point in the middle to the width (5) at the widest point at both ends i...

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Abstract

The invention relates to a motor, more specifically to a rotor punching plate of high efficiency permanent magnet synchronous motor. The rotor punching plate of high efficiency permanent magnet synchronous motor has a plurality of rotor grooves provided thereon in two sizes wherein the depth ratio of shallow grooves depth and the common grooves depth is between 0.6-0.95. Nonuniform magnet steel grooves are opened on the rotor punching plate, the width ratio of the middle width and the both ends width thereof is between 0.5-0.95. This invention can not only improve start performance of the motor but also eliminate part of harmonic wave which is harmful to motor, wearing, temperature rising and noise of the permanent magnet synchronous motor can also be obviously depressed, thus the efficiency thereof can be improved.

Description

field of invention [0001] The invention relates to a motor, more specifically, to a rotor punch of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have been widely used due to their high efficiency, energy saving, high power density and high torque density. Although the stator structure and manufacturing process of the permanent magnet synchronous motor are similar to the asynchronous AC motor, the rotor structure of the two is different. The rotor of the permanent magnet synchronous motor is embedded with magnetic steel (rare earth magnetic material), and the magnetic pole is formed by the magnetic steel. Whether the design of the rotor plate is reasonable is the key to the success of the permanent magnet synchronous motor design. The shape and size of the rotor grooves of the rotor punch of the existing self-starting permanent magnet synchronous motor are generally the same, and the width of the magnetic steel groove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
Inventor 王步来王锡淮顾伟
Owner SHANGHAI MARITIME UNIVERSITY
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