Cooling control device, magnetic levitation system and cooling control method thereof

Abstract

The invention discloses a cooling control device, a magnetic suspension system and a cooling control method thereof. The device comprises a collection unit, a determination unit and control unit; thecollection unit is used for collecting a displacement signal of a motor rotor of the magnetic suspension system and collecting a liquid level signal of a refrigerant in a cavity of a magnetic suspension compressor; the determination unit is used for determining whether the displacement signal is greater than or equal to a set reference displacement or not, if the displacement signal is greater than or equal to the set reference displacement, whether the magnetic suspension compressor is greater than or equal to the set reference liquid level or not is further determined after the set duration,and if the liquid level signal is not larger than or equal to the set reference liquid level, a refrigerant reducing signal is generated; and the control unit is used for controlling the input quantity of the refrigerant of the cavity of the magnetic suspension compressor to be reduced and / or controlling the output quantity of the refrigerant of the cavity of the magnetic suspension compressor tobe increased according to the refrigerant reduction signal. According to the scheme, the problem that the operation stability of the magnetic suspension compressor is influenced by liquid accumulation in the compressor cavity can be solved, and the effect of ensuring the operation stability of the magnetic suspension compressor is achieved.

Description

technical field [0001] The invention belongs to the technical field of magnetic suspension, and in particular relates to a cooling control device, a magnetic suspension system and a cooling control method thereof, in particular to a cooling control device of a magnetic suspension compressor, a magnetic suspension system and a cooling control method thereof. Background technique [0002] In the power electronics industry, good cooling of the motor stator ensures safe and efficient operation of the motor. In some compressors, the motor windings are mainly cooled, and the refrigerant cooling method can usually meet the cooling requirements of the motor windings; while in the magnetic levitation compressor, in addition to the motor windings, the magnetic bearings also need to be cooled. The amount of refrigerant and the cooling channel are different from the cooling of the common compressor cavity. [0003] Different from conventional centrifugal compressors, the stable levitat...

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Problems solved by technology

[0005] The object of the present invention is to, in view of the above defects, provide a cooling control device, a magnetic levitation system and a cooling control method thereof, to solve the problem that the liquid in the compressor chamber will affect the magnetic levitation compressor when the refrigerant is used to cool the magnetic levitation centrifugal compressor. The operation stability of the magnetic levitation compressor can be guaranteed to achieve the effect of ensuring the operation stability of the magnetic levitation compressor

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