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Cast copper rotor for variable frequency motor

A frequency conversion motor and copper casting technology, applied in asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of rotor loss and increased motor loss, and achieve the effects of low rotor resistance, reduced rotor loss, and improved motor efficiency.

Inactive Publication Date: 2015-11-11
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequency conversion speed control method makes the motor supply voltage contain a large number of high-order harmonics, which will cause increased motor losses, the most notable of which is the rotor loss

Method used

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  • Cast copper rotor for variable frequency motor
  • Cast copper rotor for variable frequency motor

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] like figure 1 or figure 2 As shown, the rotor core 5 is formed by laminating a plurality of rotor laminations 1 of the same size and shape. The central circular hole structure of the rotor sheet 1 is laminated to form a shaft hole 3 for installing the motor shaft. A certain number of closed guide bar holes 2 are evenly distributed on the circumference of the rotor sheet 1. The guide bar holes 2 are in an inverted trapezoidal structure with a wide top and a narrow bottom. After lamination, a guide bar groove for pouring cast copper guide bars 6 is formed. The number of guide bar holes 2 is determined according to the performance requirements of the frequency conversion motor using the present invention, and the present embodiment is 26.

[0018] The cast copper guide bar 6 and the cast copper end ring 4 are die-cast to form an integra...

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Abstract

The invention discloses a cast copper rotor for a variable frequency motor. A rotor core (5) of the rotor is formed by overlapping of a certain quantity of rotor sheets (1) of the same sizes and shapes; the rotor sheets (1) are of circular hollow structures, and the central parts are shaft holes (3) for mounting a motor revolving shaft; a certain quantity of closed conducting bar holes (2) are uniformly distributed in the circumferences of the rotor sheets (1); the conducting bar holes (2) are of reverse trapezoidal structures being wider on upper parts and narrower on lower parts; the conducting bar holes (3) in the rotor sheets (1) form conducting bar grooves in the rotor core (5) after overlapping; and melted copper is filled into the conducting bar grooves in a one-to-one correspondence manner, and integrated with cast copper end rings (4) which are firmly bonded at the two ends of the rotor core (5), thereby constructing a cast copper mouse cage structure of the rotor.

Description

technical field [0001] The invention relates to a cast copper rotor of a variable frequency motor. Background technique [0002] With the increasing scarcity of energy, saving energy and reducing consumption has become an extremely urgent task facing the development of the international community. It is of great significance to develop an ultra-efficient motor system to ensure the full utilization and sustainable development of energy in our country. [0003] In terms of reducing motor loss, copper has good electrical conductivity compared to aluminum. The cast copper rotor is a new type of motor rotor with copper as the conductive matrix. Using the excellent electrical conductivity of copper can reduce rotor loss and improve motor efficiency. However, although the efficiency of the power frequency cast copper rotor motor has been significantly improved, its starting current becomes larger and the starting torque becomes smaller, sometimes even exceeding the tolerance range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/16H02K1/26
Inventor 黄元峰王海峰艾程柳徐松
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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