Drive control device and method for electronic expansion valve
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United States of America Patent
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-
Dec 26, 2017
Grant Date -
Nov 20, 2014
app pub date -
Jun 21, 2012
filing date -
May 17, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A drive control device and method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
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