Brushless electric motor

A motor, brushless technology, applied in electrical components, electromechanical devices, other washing machines, etc., can solve the problems of increased leakage current and smaller insulation distance of washing machines, and achieve the effect of reducing leakage current and increasing insulation distance.

Active Publication Date: 2009-04-08
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the insulation distance between the winding of the gap and the stator core becomes smaller, and the washing machine operating in an environment with relatively high humidity has the problem of increased leakage current.

Method used

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  • Brushless electric motor
  • Brushless electric motor
  • Brushless electric motor

Examples

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Embodiment Construction

[0015] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.

[0016] figure 1 It is a perspective view which shows the drum-type washing-drying machine of the Example of this invention.

[0017] On the upper part of the base 1 is placed an outer frame 2 composed of a combination of a resin molded product and a steel plate. A door 3 for taking out and putting in laundry is provided on the front of the outer frame 2, and a switch operation is performed with a push button switch 4. The door 3 is composed of a resin molded product with design parts on the outside and a door made of heat-resistant glass on the inside. A drain hose fixing hole 5 is provided on a side surface of the outer frame 2 . A plurality of handles 6 are provided for carrying the mobile body. In addition, a detergent pan 7 and a drying filter 8 are respectively attached to the left and right of the upper surface of the outer frame 2 . An operation ...

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PUM

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Abstract

The present invention relates to a brushless motor. In order to improve the efficiency of the DC brushless motor to increase the duty cycle of the windings housed in the slot. Therefore, the insulated distance between the windings of slit and the stator core becomes less, and the problem of increased leakage current exists in the working washer under relatively high humidity conditions. In order to solve the problem, the present invention provides an DC brushless motor, which makes the front end section of the T shaped piece of the stator into a on-concentric circular relative to the rotor, makes the front end section of the shaped piece opposite to the rotor into a reversed circular arc, a gap section is provided between the concentric circle of inscribing the front end section of the T shaped piece and the front end section of the T shaped piece of the stator, the insulated object for insulating the windings passes through the narrow slit from the inner side to the gap section for integral resin die-casting into a stator core, thereby increasing the insulated distance between the winding and the stator core.

Description

technical field [0001] The present invention relates to a brushless motor which improves insulation between a winding and a stator core in a stator of the brushless motor. Background technique [0002] Patent Document 1 - Japanese Unexamined Patent Publication No. 2000-175394 describes a technique for securing an insulation distance by extending a slot insulator to a slit that is a gap between adjacent T-pieces. [0003] DC brushless motors for direct drive washing machines require low rotation speed and high torque in the washing process, so they require a large number of slots in the stator to output high torque. In addition, in the dehydration process, although the torque is small, the speed needs to be increased. Usually, the speed is increased by field weakening control, but since the higher the driving voltage, the higher the speed can be, so the commercial power supply is doubled and rectified to supply high DC power. Also, the space factor of the windings accommodat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/12H02K3/32D06F33/02D06F37/00
Inventor 成田博文大川友弘丰田荣治坂本国弘
Owner HITACHI APPLIANCES INC
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