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Induction synchro motor

A technology of synchronous motors and electric angles, which is applied to asynchronous induction motors, synchronous machines, synchronous motors with stationary armatures and rotating magnets, etc., can solve the problems of cost increase and achieve the effect of large reluctance torque

Inactive Publication Date: 2002-09-11
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, considering the recent demand for efficiency such as energy consumption restrictions, the operating efficiency of the motor used for the hermetic electric compressor constituting the refrigerating cycle of a refrigerator or an air conditioner is not necessarily high.
On the other hand, it is effective to use a DC brushless motor for high efficiency, but the DC brushless motor requires a drive circuit, which has the problem of increasing the cost

Method used

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Embodiment Construction

[0027] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a vertically sectional side view of a hermetic electric compressor C using an induction synchronous motor 2 according to the present invention. In this figure, reference numeral 1 is an airtight container, and an induction synchronous motor 2 is accommodated on the upper side thereof, and a compressor 3 driven to rotate by the induction synchronous motor 2 is accommodated on the lower side. The airtight container 1 is divided in advance, the induction synchronous motor 2 and the compressor 3 are housed therein, and then closed by high-frequency welding or the like. Examples of the hermetic electric compressor C include rotary compressors, reciprocating compressors, and scroll compressors.

[0028] The induction synchronous motor 2 is composed of a stator 4 and a rotor 5. The stator 4 is composed of single-phase two poles and is fixed on the inne...

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Abstract

The induction synchronous motor 2 is composed of a stator 4 having a stator winding 7 and a rotor 5 rotating inside the stator 4 , and a cage-type secondary conductor 5B is provided around a rotor yoke 5A constituting the rotor 5 . A permanent magnet 31 having two poles is embedded in the rotor yoke portion 5A. In the specified range near the electrical angle of 0° and 180°, the magnetomotive force of one pole of the rotor is kept below 10% of the peak value. In this way, the magnetomotive force generated by the rotor having the permanent magnets constituted by two poles can be concentrated to realize a large reluctance torque and high efficiency.

Description

technical field [0001] The present invention relates to an induction synchronous motor having two-pole permanent magnets embedded in a rotor yoke. Background technique [0002] Conventionally, a hermetic electric compressor constituting the refrigeration cycle of the cooling device has been installed in, for example, a refrigerator or an air conditioner. The electric element driving the compressor uses an induction motor or a DC brushless motor driven by a single-phase or three-phase commercial power supply. [0003] However, in consideration of efficiency requirements such as recent energy consumption restrictions, the operating efficiency of a motor used for a hermetic electric compressor constituting a refrigerating cycle of a refrigerator, an air conditioner, etc. is not necessarily high. On the other hand, although it is effective to use a DC brushless motor for high efficiency, the DC brushless motor requires a drive circuit, which has the problem of increasing the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/22H02K1/27H02K17/08H02K17/26H02K21/14H02K21/46
CPCH02K1/276H02K17/08H02K21/46H02K2201/06
Inventor 簗岛俊人新井和彦竹泽正昭山下将德五十岚惠司郎村田荣一中山善友小矶繁美小野寺升
Owner SANYO ELECTRIC CO LTD
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