Linear compressor controller

Details Linear compressor controller Linear compressor controller

2005-09-14

2010-02-16

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S012060, C310S013000, C310S014000, C310S015000, C318S114000, C318S119000, C318S135000

Reexamination Certificate

active

07663275

ABSTRACT:
A sensorless method and apparatus for detecting piston collisions in a free piston linear compressor motor. The waveform of the back EMF induced in the motor stator windings is analysed for slope discontinuities and other aberrations in a time window centred on the back EMF zero-crossings. Waveform slope artefacts are indicative of piston collisions and cause the motor power to be decremented in response.

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