Negative sequence carrier signal controller

Details Negative sequence carrier signal controller Negative sequence carrier signal controller

2011-08-23

2011-08-23

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400010, C318S400320, C318S400420, C318S700000

Reexamination Certificate

active

08004222

ABSTRACT:
A negative sequence feedback circuit is connected to monitor and minimize unbalances in a high-frequency ac carrier signal provided to a motor/load for the purpose of detecting rotor position. The negative sequence feedback circuit detects unbalances in the high-frequency ac carrier signal and generates negative sequence feedback. The feedback is combined with command signals used to generate the high-frequency ac carrier signal, and the combination of the command signals with the negative sequence feedback is provided to an inverter for generation of the high-frequency ac carrier signal, wherein the negative sequence feedback reduces unbalances in the resulting high-frequency ac carrier signal such that a balanced high-frequency carrier signal is provided to the motor/load.

REFERENCES:
patent: 5565752 (1996-10-01), Jansen et al.
patent: 6052297 (2000-04-01), Akamatsu et al.
patent: 6762573 (2004-07-01), Patel
patent: 6822418 (2004-11-01), Harke
patent: 7034497 (2006-04-01), Markunas et al.

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