Patent ID: 8493013
Filing Date: 2013-07-23
Classification: H02P

Abstract:
1. A method of power control for an electrical motor, the method comprising: a) providing a desired control line function that determines hold-off time based on a detected phase lag of a motor drive signal, said control line function being an algebraic function that establishes a relationship between hold-off time and detected phase lag; b) establishing a bypass load threshold level, said bypass threshold level having a value less than a maximum rated motor load of the motor; c) receiving a motor drive power input from a supply having a drive voltage; d) detecting a load level of the motor while said motor is being driven with said motor drive power input; e) bypassing said control line function and providing full supply voltage to said motor when said load level of the motor meets or exceeds the bypass load threshold level; and f) controlling said motor according to said control line function when said load level of the motor is less than said bypass load threshold level.