Patent
Anti-collision travel control method of reciprocating type compressor, reciprocating type compressor and refrigerator
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TLDR
In this article, an anti-collision travel control method of a reciprocating type compressor, the reciprocating types of compressor and a refrigerator is presented, and the position of the compressor is judged through software according to the high-low level generated by a zero cross circuit, and it is avoided that the piston collides with an exhaust valve plate.Abstract:
The invention discloses an anti-collision travel control method of a reciprocating type compressor, the reciprocating type compressor and a refrigerator. The anti-collision travel control method of the reciprocating type compressor comprises the following steps that (1) the counter electromotive force sensed by a coil is collected; (2) zero-cross detection is conducted on the counter electromotiveforce; and (3) secondary derivation is conducted on a counter electromotive force curve, a secondary derivation value is obtained, and when it is judged that a piston operates to an upper stop point,the absolute value of the current secondary derivation value is compared with a threshold value t1. According to the anti-collision travel control method of the reciprocating type compressor, the cost and space of installing a displacement sensor and other detection devices at present are saved; the position of the compressor is judged through software according to the high-low level generated bya zero cross circuit, and it is avoided that the piston collides with an exhaust valve plate.read more
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Patent
Stroke estimation method and device for linear compressor
TL;DR: In this article, a stroke estimation method and device for a linear compressor is presented. But this method requires the rotor to move to the reversed maximum stroke position from the forward maximum stroke positions, and a characteristic value of the counter electromotive force is generated.
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Patent
Apparatus and method for controlling operation of compressor
TL;DR: An apparatus for controlling an operation of a compressor includes: a back electromotive force calculator for calculating a back EMotive force of a compressors based on a value of a current applied to a motor of the compressors and a values of a voltage applied to the motor of compressors as mentioned in this paper.
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