Stabilizing scheme for an a-c electric motor drive- system

Details Stabilizing scheme for an a-c electric motor drive- system Stabilizing scheme for an a-c electric motor drive- system

H - Electricity

02

P

318/103, 318/94

H02P 23/14 (2006.01)

Patent

CA 1089007

ABSTRACT OF THE DISCLOSURE A novel system for stabilizing adjustable speed a-c electric motor drive systems that employs a "torque angle" feedback signal to describe the current-flux phase angle interaction resulting from transient electromagnetic characteristics in variable speed and load applications. Provision is also made for control of the frequency and amplitude of stator excitation as a function of the feedback signal permitting continuous phase alignment between inverter firing pulses and motor flux, and resulting in improved transient behavior between braking and motoring modes.

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