发明名称 |
LINEAR MOTOR |
摘要 |
The present invention provides an improved design of linear motor as well as an improved control strategy. The design allows for a shorted stator, where the armature magnets are controlled to reciprocate to a greater maximum displacement than for an equivalent conventional linear motor. The control strategy is such that a minimum of external sensors are required. The linear motor is driven at its resonant frequency ensuring optionally efficient operation. A determination of the maximum current is ma de based on a relationship with the resonant frequency and the evaporating temperature/pressure of the vapour entering the compressor. The current is then limited to control the maximum displacement to avoid damage. |
申请公布号 |
CA2475936(C) |
申请公布日期 |
2005.08.02 |
申请号 |
CA20002475936 |
申请日期 |
2000.06.21 |
申请人 |
FISHER & PAYKEL APPLIANCES LIMITED |
发明人 |
BOYD, JOHN HENRY;DUNCAN, GERALD DAVID |
分类号 |
F04B17/04;F25B31/02;H02K33/00;H02K41/02;(IPC1-7):H02K33/00 |
主分类号 |
F04B17/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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