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Directly driven brushless permanent-magnet motor with external rotor for washer

A permanent magnet brushless and external rotor technology, which is applied to electromechanical devices, synchronous motors with stationary armatures and rotating magnets, electrical components, etc., can solve the problems of stepless speed regulation, poor reliability, and heavy weight , to achieve the effects of improving work efficiency, improving reliability, and hardening mechanical properties

Inactive Publication Date: 2002-11-27
苏州和鑫电气股份有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the washing machines on the market are mainly two types of structures, the pulsator type and the drum type. The drum type washing machine has the characteristics of no entanglement of clothes, low wear rate, high cleaning degree, and wide washing range, but the body is heavy, bulky, and expensive. Expensive, the key components of the washing machines of the two structures are the drive motors, they all use traditional "single-phase induction motors", and drive the washing drum through gears, belts and other reduction mechanisms for variable speed drive, some products drive motor speed is Constant, the speed is adjusted by a complex speed change mechanism to meet the dual functions of low-speed washing and high-speed dehydration. Although some products also use frequency conversion technology to adjust the speed, because the driving motor is a single-phase induction motor, one side of the washing machine cabinet The washing drum is placed, and the other side is a high-speed single-phase induction motor, which is connected to the central axis of the washing drum through gears and belts. Narrow range, poor reliability performance
[0003] figure 1 It is a schematic diagram of the transmission mechanism of a traditional drum washing machine. Its structure is relatively complicated. A large pulley is installed at one end of the shaft, and a small pulley is coaxial with the single-phase induction motor, which drives the transmission V-belt for deceleration transmission. The driving motor is usually a two-speed motor. When washing and rinsing, the motor runs at a low speed, and the drum rotates at 50-70 rpm. During dehydration, the motor runs at a high speed, and the drum rotates at 350-750 rpm. The motor can only rotate at two speeds. Stepless speed regulation, let alone directly drive the washing drum

Method used

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  • Directly driven brushless permanent-magnet motor with external rotor for washer
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  • Directly driven brushless permanent-magnet motor with external rotor for washer

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Embodiment

[0029] Example: such as figure 2 , image 3 , Figure 4 , Figure 5 As shown, a direct-drive outer rotor permanent magnet brushless washing machine motor includes an inner stator [1] and an outer rotor [2], the inner stator [1] includes a stator yoke [3], on the stator yoke [3] It is equipped with a stator slot [4], and a stator winding [5] is arranged in the stator slot [4]. The outer rotor [2] is concave, and the end face is provided with a shaft hole [6]. A permanent magnet pole [7] is fixed on the inner wall of the circumference, and a radial air gap [8] is set between the inner stator [1] and the outer rotor [2].

[0030] In the future, the connection between the motor and the washing drum will be as follows: the outer rotor [2] of the motor is fixed on a Y-shaped outer aluminum bracket, the washing drum is rigidly connected with another Y-shaped inner aluminum bracket, and the outer rotor shaft hole [6] is inlaid with Spline groove, the two brackets are connected wi...

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Abstract

A directly driven brushless permanent-magnet motor with external rotor for the washes of composed of internal stator with windings in the slots on stator yoke and the concave external rotor with shaft hole on its end face and permanent magnets fixed on its inner wall. Its advantages are simple structure, high output power and reliability, low cost, stepless speed regulation, and low noise.

Description

technical field [0001] The invention relates to a motor for a washing machine. Background technique [0002] At present, the washing machines on the market are mainly two types of structures, the pulsator type and the drum type. The drum type washing machine has the characteristics of no entanglement of clothes, low wear rate, high cleaning degree, and wide washing range, but the body is heavy, bulky, and expensive. Expensive, the key components of the washing machines of the two structures are the drive motors, they all use traditional "single-phase induction motors", and drive the washing drum through gears, belts and other reduction mechanisms for variable speed drive, some products drive motor speed is Constant, the speed is adjusted by a complex speed change mechanism to meet the dual functions of low-speed washing and high-speed dehydration. Although some products also use frequency conversion technology to adjust the speed, because the driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K1/27H02K21/22H02K29/00
Inventor 林德芳胡岗
Owner 苏州和鑫电气股份有限公司
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