Device and method for estimating the resistance of

专利名称：Device and method for estimating the

resistance of a stator winding for an ACinduction motor

发明人：Sang-Bin Lee,Thomas G. Habetler,David J.

Gritter

申请号：US09929990申请日：20010815公开号：US06621291B2公开日：20030916

专利附图：

摘要：A device and method to estimate the resistance of a stator winding of an AC

induction motor is provided. The device includes an AC induction circuit connecting onephase of the AC induction motor to an AC source. The circuit includes a resistor and aswitch connected in parallel. The switch is alternatively closed during the half cycles ofthe AC current supplied to the motor so as to inject a DC voltage and current bias to theAC motor. The resistance of the stator winding is estimated in response to the DCvoltage and current bias.

申请人：EATON CORPORATION

代理机构：Boyle Fredrickson Newholm Stein & Gratz S.C.

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