Apparatus for measuring excitation parameters of induction motor and method thereof
AssigneeDelta Electronics (Shanghai) Co., Ltd.
InventorsZhiguang Gao, Cheng Lu, Jianping Ying
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Abstract
The present invention relates to the technical field of motor control, and discloses an apparatus for measuring excitation parameters of an induction motor and a method thereof. The method comprises: maintaining the induction motor static, and inputting a test current to a test phase of the induction motor; and calculating, based on a voltage of the test phase of the induction motor, a stator flux linkage of the test phase of the induction motor corresponding to a magnitude of the test current. The disclosure can conveniently and accurately measure excitation parameters of the induction motor.
Claims28
An apparatus for measuring excitation parameters of an induction motor, comprising:
- a control unit, a power converter, and an excitation parameter calculating unit, wherein:
- the power converter is for providing a test current to a test phase of the induction motor, and an output of the power converter maintains the induction motor static;
- the control unit is equipped with a current instruction for indicating the test current, and the control unit is for regulating the test current provided by the power converter to be equivalent to the current instruction, meanwhile controlling the output of the power converter to maintain the induction motor static;
- and
- the excitation parameter calculating unit is for receiving a voltage signal of a test phase of the induction motor and a current signal of the test phase of the induction motor, so as to calculate the excitation parameters.
A method for measuring excitation parameters of an induction motor, comprising:
- maintaining the induction motor static, and inputting a test current to a test phase of the induction motor;
- and
- calculating, based on a voltage of the test phase of the induction motor, a stator flux linkage of the test phase of the induction motor corresponding to a magnitude of the test current.
Dependencies are inferred from the claim text.