Surface-mounted internal rotor permanent magnet synchronous motor with fast response

A permanent magnet synchronous motor, inner rotor technology, applied in synchronous motors with static armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of slow servo response, quadrature axis Problems such as slow current, to achieve the effect of accelerating torque response speed, speed servo response speed, and response speed

Inactive Publication Date: 2016-01-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The larger the quadrature axis inductance of the permanent magnet synchronous motor, the slower the response of the quadrature axis current under the same supply voltage, resulting in the slower servo response of the motor's overall torque, speed, and position

Method used

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  • Surface-mounted internal rotor permanent magnet synchronous motor with fast response
  • Surface-mounted internal rotor permanent magnet synchronous motor with fast response
  • Surface-mounted internal rotor permanent magnet synchronous motor with fast response

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Experimental program
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specific Embodiment approach 1

[0024] Specific implementation mode one: as image 3 with Figure 4 As shown, this embodiment describes a faster-response surface-mounted inner rotor permanent magnet synchronous motor, including an inner rotor and an outer stator 1, and the outer stator 1 is sleeved outside the inner rotor and between the two There is a gap, the inner rotor includes a rotating shaft 2, an iron core 3 and a plurality of permanent magnets 4, and the plurality of permanent magnets 4 are tile-shaped; the iron core 3 is fixedly sleeved on the rotating shaft 2, so The iron core 3 is provided with a plurality of slotted units 5 near the edge of the outer circumference. The plurality of permanent magnets 4 are arranged in sequence and are all pasted on the outer circumference of the iron core 3. The plurality of permanent magnets 4 are all diameter Direct or axial magnetization, every two adjacent permanent magnets 4 have opposite polarities (to establish a magnetic field with alternating N and S po...

specific Embodiment approach 2

[0025] Specific implementation mode two: as image 3 As shown in the specific embodiment 1 of the surface-mounted inner rotor permanent magnet synchronous motor with faster response, the outer peripheral surface of the inner rotor is fixed with a shielding sleeve 6 to protect the permanent magnet 4 .

specific Embodiment approach 3

[0026] Specific implementation mode three: as image 3 with Figure 4 As shown, in the surface-mounted inner rotor permanent magnet synchronous motor with faster response described in the first specific embodiment, each of the slotting units 5 includes a plurality of grooves, and the plurality of grooves are arc groove, trapezoidal groove, V-shaped groove or W-shaped groove. In order to facilitate processing.

[0027] The shape of each groove unit 5 is not limited to the several shapes listed above, and other shapes can also be used. The shape of the slot can be either the above-mentioned symmetrical slot structure per pole, or an asymmetric structure under each pole, such as a symmetrical slot structure under each pair of poles.

[0028] Symmetrical slotting method for each pole: such as Image 6 As shown, that is, the slot under one magnetic pole is symmetrical along the center line of this magnetic pole, and the left and right sides are respectively connected to the two...

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Abstract

Provided is a surface-mounted internal rotor permanent magnet synchronous motor with fast response. The invention relates to an internal rotor permanent magnet synchronous motor. According to the surface-mounted internal rotor permanent magnet synchronous motor, permanent magnets are pasted on the outer circumferential surface of an iron core, grooves parallel to the direction of magnetic lines are arranged in the iron core of an internal rotor, magnetic lines of a main flux do not pass a non-magnetic medium, the original performance of the motor can be guaranteed, the quadrature-axis inductance is further reduced, the quadrature-axis inductance is lower than the direct-axis inductance, and the servo response speed of the permanent magnet synchronous motor is increased. A rotating shaft is fixedly sleeved by the iron core, a plurality of groove units are arranged at edges of the iron core close to the outer circumference, a plurality of permanent magnets are arranged in sequence and pasted on the outer circumferential surface of the iron core, the plurality of permanent magnets are all radially or axially magnetized, the polarities of each two adjacent permanent magnets are opposite, and two adjacent ends of each two adjacent permanent magnets correspond to one groove unit. The surface-mounted internal rotor permanent magnet synchronous motor is applicable to the permanent magnet synchronous motors in need of fast servo response.

Description

technical field [0001] The invention relates to an inner rotor permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in the field of industrial servo, which has the advantages of high power density, high energy conversion efficiency, and good control characteristics. Permanent magnet synchronous motors are equipped with permanent magnets on the rotor, windings on the stator, and an air gap between the stator and rotor. The permanent magnets on the rotor generate magnetic fields with N and S polarities in the air gap. According to the theory of AC motors, from the perspective of the rotor, the magnetic field in the motor can be decomposed into two components, the direct axis and the quadrature axis. Generally, the position corresponding to the center line of the N pole is called the direct axis, and the position where the N and S polarities meet is called the direct axis. The position is called the quadrature a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/27
Inventor 王宝超邹继斌徐永向刘承军胡建辉江善林赵猛
Owner HARBIN INST OF TECH
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