A Fault-Tolerant Rim Propulsion Motor with Few Slots and Multipole Permanent Magnet

A permanent magnet fault-tolerant, rim propulsion technology, applied in magnetic circuits, electromechanical devices, electrical components, etc., can solve problems such as increasing production cycle, and achieve the effect of improving running performance, large slot width, and large winding utilization rate

Active Publication Date: 2022-03-25
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the permanent magnet fault-tolerant rim propulsion motor still adopts a deep and narrow notch structure, and the notch is too small, so it has to be manually off-line, which increases the production cycle

Method used

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  • A Fault-Tolerant Rim Propulsion Motor with Few Slots and Multipole Permanent Magnet
  • A Fault-Tolerant Rim Propulsion Motor with Few Slots and Multipole Permanent Magnet
  • A Fault-Tolerant Rim Propulsion Motor with Few Slots and Multipole Permanent Magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] figure 1 For Example 1, figure 2 For embodiment 2; figure 2 The stator is divided to form a modular structure for easy maintenance. like figure 1 As shown, the few-slot multi-pole permanent magnet fault-tolerant rim propulsion motor consists of a stator and a rotor. The stator includes: winding slots 3 , isolation slots 4 , isolation teeth 1 , isolation teeth 2 , and armature teeth 5 . The windings of the multi-pole permanent magnet fault-tolerant rim propulsion motor with few slots are embedded in the winding slots, which is a single-layer centralized winding structure. The windings only surround the armature teeth. The winding distribution is as follows: image 3 shown.

Embodiment approach 2

[0023] The tooth widths of the spacer teeth 1, the spacer teeth 2, and the armature teeth 5 are equal, and the widths of the pole pieces are equal. The width of the isolation groove is adjustable, and the preferred width is the width that reduces the cogging torque ripple. The interior of the isolation slot is filled with non-magnetic, anti-corrosion and heat-insulating materials. Increased magnetic isolation and thermal isolation between phases. In Embodiment 2, the isolation slots divide the stator to form a modular structure.

[0024] Further, the rotor includes: a rotor yoke 12 , a permanent magnet 10 , an anticorrosion protective layer 9 and a protective sleeve 8 . The rotor yoke 12 is an integral steel structure without punching, and the propeller 11 is directly welded on the inner diameter of the rotor. The permanent magnet 10 is a surface-mounted permanent magnet with a centrifugal height or a Halbach array structure. The exterior of the permanent magnet 10 is fille...

Embodiment 1

[0026] The structural parameters of Example 1 are shown in Table 1, and the comparison structure of the 36-slot 30-pole permanent magnet fault-tolerant motor is as follows: Figure 4 As shown, the structural parameters are shown in Table 2:

[0027] Table 1 Embodiment 1 Structural parameters

[0028]

[0029]

[0030] Table 2 Structural parameters of 36-slot 30-pole comparative structure

[0031]

[0032] Example 1 has a larger winding factor of 0.996, and the comparative structure has a winding factor of 0.966. Example 1 no-load back EMF such as Figure 5 As shown, the no-load back EMF of the comparative structure is as follows Image 6 shown. It can be seen that the no-load back electromotive force of Example 1 is not much different from that of the comparative structure, and the winding utilization rate is basically unchanged.

[0033] Embodiment 1 can effectively reduce the cogging torque pulsation. The cogging torque pulsation in Embodiment 1 is as follows: ...

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Abstract

The invention discloses a small-slot multi-pole permanent magnet fault-tolerant rim propulsion motor. The specific scheme includes: a stator and a rotor. The stator is provided with a plurality of winding slots, armature teeth, isolation teeth 1 and isolation teeth 2. An isolation slot is arranged between the first isolation tooth and the second isolation tooth, and the tooth widths of the armature teeth, the first isolation tooth and the second isolation tooth are equal, and the width of the pole shoe is equal; the number of winding slots is 4km, and the rotor The number of magnetic poles is k (6m±2), k is a positive integer, and m is the number of motor phases. The motor can continue to run stably after an open circuit fault or a short circuit fault. It has greater winding utilization, smaller cogging torque ripple, stronger magnetic isolation and thermal isolation. The ability to suppress short-circuit current is stronger. Under the same requirements, it has a larger slot width and can be automatically off-line, which reduces the production cost and makes mass production possible.

Description

technical field [0001] The invention relates to the technical field of propulsion motors, in particular to a multi-pole permanent magnet fault-tolerant wheel rim propulsion motor with few slots. Background technique [0002] The prior art discloses a permanent magnet fault-tolerant wheel rim propulsion motor for integrated motor propulsion, which belongs to a motor for underwater propulsion. These include stator core, stator slots, armature teeth, spacer teeth, armature windings, large air gap, pole protection sleeves, pole protection layers, centrifugal permanent magnets, rotor core, and the propeller welded on the inside of the rotor core. The number of stator slots is 2km, where k is a positive integer, m is the number of motor phases, there are unequally spaced armature teeth and isolation teeth on the stator, and the number of rotor poles is 2k (m±1). The feature of the motor is that it can continue to operate stably after an open-circuit fault or a short-circuit fault...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/16H02K1/278H02K1/28
CPCH02K1/165H02K1/278H02K1/28H02K2213/12
Inventor 朱景伟马瑞林乾宏
Owner DALIAN MARITIME UNIVERSITY
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