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High-quality three-phase alternating current permanent magnet servo synchronous motor

A synchronous motor, three-phase AC technology, applied in the field of servo motors, to achieve the effect of improving saliency, increasing saliency, and improving the sensitivity of servo

Inactive Publication Date: 2012-02-15
江西省迪普安数字功率技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this structure, the permanent magnet is attached to the outer surface of the rotor, which is easily damaged without protection and has poor reliability; moreover, the air gap magnetic field has poor sinusoidality, so it is not suitable for high-quality three-phase AC permanent magnet servo synchronous motor

Method used

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  • High-quality three-phase alternating current permanent magnet servo synchronous motor
  • High-quality three-phase alternating current permanent magnet servo synchronous motor
  • High-quality three-phase alternating current permanent magnet servo synchronous motor

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Embodiment Construction

[0030] The stator core of the embodiment of the present invention is inclined by 7 / 32 tooth pitches. After comprehensive calculation, the harmonic content of the opposite electromotive force of the winding is less than 1%. Compared with an imported product with 12 slots, 8 poles, 3 phases, q=1 / 2 fractional slot pitch of 1 concentrated winding, its opposite electromotive force harmonic content is as high as 24.5%. The harmonic content of the reverse electromotive force is reduced by 95.92%, accounting for only 4% of the original harmonic. It can be seen that the reverse potential waveform of the embodiment of the present invention is a highly sinusoidal waveform.

[0031] The stator windings of the embodiments of the present invention are Y-connected at low speeds, thereby increasing the low-speed torque; delta-connected at high speeds, thereby reducing high-speed overvoltage, ensuring safety, and expanding the high-speed operating range.

[0032] Since the stator iron core has...

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Abstract

The invention relates to a high-quality three-phase alternating current permanent magnet servo synchronous motor, which comprises a stator and a rotor, wherein a stator core of the motor has 12 slots, the stator core is inclined for 7 / 32 pitches, the pole number is 10, and the phase number is 3; and a stator core three-phase winding is a fractional slot concentrated winding, the pitch of winding coils is 1, the number of turns of each coil is equal, and the difference of the three-phase winding is 120-degree electrical angles. The three-phase winding has 6 lead-out wires and provides two wiring methods. A rotor permanent magnet structure is in a built-in type, N and S poles of neodymium iron boron permanent magnets are alternately embedded into a ladder-shaped groove stacked into a rotor core by a rotor stamping piece, the rotor core is axially divided into two sections equally, and the central line of two sections of magnets with the same polarity is axially deflected for 4mm; and the excircle and the axle hole of a pole shoe of the rotor core are not concentric, ununiform air gaps are formed between the pole shoe of each pole and the inner circle of the stator core, and a plurality of measures are adopted to greatly improve the sine property of a phase voltage waveform of the motor and motor quality. The invention is suitable for the three-phase alternating current permanentmagnet servo synchronous motor.

Description

[0001] technical field [0002] The invention relates to a high-quality three-phase AC permanent magnet servo synchronous motor, which belongs to the technical field of servo motors. Background technique [0003] At present, in the AC servo drive system, there are two types of AC servo motors commonly used. One is a brushless DC motor, referred to as BDCM; the other is a three-phase permanent magnet synchronous motor, referred to as PMSM. For high-precision control servo systems, PMSM has more advantages and is the focus and hotspot of development. Since the three-phase symmetrical sinusoidal current is input to the PMSM, it is required that the induced electromotive force of each phase of the PMSM should also be a sinusoidal wave. In general, the air-gap magnetic field generated by the permanent magnet is not sinusoidally distributed, but to realize the induced electromotive force of each phase is a sine wave, which puts forward higher requirements for the design of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/16H02K1/27H02K3/28H02K1/32
Inventor 刘应东林政安吴文新刘国伟方虎堂
Owner 江西省迪普安数字功率技术发展有限公司
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