Current transformer module and compressor protection control method using same

Abstract

The invention discloses a current transformer module and a compressor protection control method using the same. The current transformer module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a first diode, and a transformer. The method comprises steps of: computing an operating current value according to an acquired voltage signal; detecting a current signal output by a compressor to obtain a real current detection value; obtaining a real operating current value according to the operating current value and the real current detection value; determining whether the real operating current value is greater than a preset protective current value, and stopping the compressor if yes. The method may detect the operating current of the compressor in real time by using the current transformer module, effectively increases detection precision, determines whether shutdown protection is required by computing the operating current of the compressor, and greatly decreases errors. The current transformer module and the compressor protection control method using the same can be widely used in compressor protection.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a current transformer module and a compressor protection control method using the module. Background technique [0002] As the core component of the heat pump system, the protection of the compressor is particularly important; the traditional compressor protection usually uses a high and low pressure protection switch, and its control method is to disconnect the high and low pressure protection when the system pressure reaches the high and low pressure protection value. Switch and stop the compressor for protection, but this control method will have such problems: because the detection accuracy through the high and low voltage protection switch is not high, and the error is large, it often does not achieve a good protection effect. Contents of the invention [0003] In order to solve the above technical problems, the purpose of the present invention is to provide a ...

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Problems solved by technology

[0002] As the core component of the heat pump system, the protection of the compressor is particularly important; the traditional compressor protection usually uses a high and low pressure protection switch, and its control method is to disconnect the high and low pressure protection when the system pressure reaches the high and low pressure protection value. Switch, stop the compressor running for protection, but this control method will have such problems: because the detection accuracy of the high and low voltage protection switch is not high, and the error is large, it often does not achieve a good protection effect

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