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Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same

A pole-changing motor and squirrel-cage technology, applied in asynchronous induction motors, electric components, electrical components, etc., can solve the problems of complex structure of gearbox 30, complex bearings, and increased unit price of crane manufacturing

Active Publication Date: 2015-11-25
SUNGDO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the case of including the auxiliary motor 22, not only the structure of the gearbox 30 for transmitting the power supplied by the auxiliary motor 22 is complicated, but also an auxiliary brake for stopping the spool 10 rotated by the auxiliary motor 22 needs to be included. 42
[0011] In addition to the complexity of the structure of the gearbox 30 and the need to add an auxiliary gearbox 50 and an auxiliary brake 42, other components of the crane (such as bearings, housings, etc.) may also be complicated or need to be included.
[0012] As mentioned above, the complexity of the components or the increase of the components means that additional mechanical elements are required, which not only increases the manufacturing unit price of the crane, but also causes difficulties in controlling the mechanical elements and shortens the life due to wear and tear. question

Method used

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  • Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same
  • Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same
  • Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0125]

[0126] In Experimental Example 1, in 54 slots, the pitch of the first set of coils forming 6 poles is set to 8 pitches, and the pitch of the second set of coils forming 24 poles is set to 4 pitches. The first set of coils with 6 poles can generate normal magnetic force to rotate the rotor at high speed, but the second set of coils with 24 poles can not generate magnetic force and cannot rotate the rotor.

experiment example 2

[0128]

[0129] In Experimental Example 2, the pitch of the coils forming the first set of 6 poles was set to 8 pitches, and the pitch of the coils forming the second set of 24 poles was set to 3 pitches in 54 slots.

[0130]In the above-mentioned Experimental Example 2, in the first group of coils forming 6 poles, normal magnetic force can be generated to rotate the rotor at high speed, but in the second group of coils forming 24 poles, although the magnetic force is generated, due to The size is too weak to spin the rotor.

experiment example 3

[0132]

[0133] Experimental example 3 is a case where the pitch of the first set of coils forming 6 poles is set to 8 pitches, and the pitch of the second set of coils forming 24 poles is set to 5 pitches in 54 slots.

[0134] In the above-mentioned Experimental Example 3, in the first group of coils forming 6 poles, normal magnetic force can be generated to rotate the rotor at high speed, but in the second group of coils forming 24 poles, although the magnetic force is generated, due to The size is weaker than Experimental Example 2 and the rotor cannot be rotated.

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Abstract

The present invention relates to a three-phase squirrel-cage pole changing motor and a hoist including the same. The three-phase squirrel-cage pole changing motor according to the present invention includes a stator which includes coils wound around a plurality of slots formed on the inner circumference thereof and a cylindrical rotor which is formed to face the inner circumference of the stator and rotates by a magnetic force generated when a current flows in the coil. The stator includes the coils which are divided into two groups and are wound to make the rotor rotate with two kinds of speeds. A first group is wound to form six poles. A second group is wound to form 24 poles.

Description

technical field [0001] The present invention relates to a three-phase special squirrel-cage pole-changing motor and a two-speed crane including the motor, in particular to a three-phase special squirrel-cage pole-changing motor capable of realizing high-speed and low-speed rotation without additional mechanical elements and including the three-phase special squirrel-cage pole-changing motor Two-speed hoist with electric motor. Background technique [0002] Today, with the development of industry, not only is the production of complex mechanical devices increasing, but also the articles made by the above-mentioned mechanical devices are shipped and used all over the world. [0003] In the process of making the above-mentioned complex mechanical devices or transporting objects, it is often necessary to lift up or lower related objects (components, objects, etc.), and the representative equipment mainly used at this time is a hoist. [0004] Here, a crane is a device that move...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/14H02K3/28H02K17/16H02K3/04
CPCB66D3/18H02K3/46H02K17/14
Inventor 卢仁铉张弘太
Owner SUNGDO MACHINERY