Patent ID: 7161316
Filing Date: 2007-01-09
Classification: F04D,H02P,Y02B

Abstract:
1. A method for controlling a motor comprising a commutation electronics configured to supply a pulsed DC voltage in a pre-established sequence to said plurality of winding stages, using discrete torque settings, in a fluid system having a variable static pressure acting on the motor, said method comprising: operating the motor at a first substantially constant torque level; receiving a torque selection signal from a source external to the motor at the said commutation electronics, said motor including at least one of: a separate input for each of a plurality of constant torque selection signals, each separate input corresponding to one of the plurality of constant torque levels; a plurality of separate inputs corresponding to a plurality of constant torque selection signals, each of the plurality of constant torque selection signals corresponding to one of the plurality of constant torque levels; and a plurality of separate inputs corresponding to a plurality of constant torque selection signals, a predetermined combination of said separate inputs corresponding to one of the plurality of constant torque levels; and operating the motor at a second substantially constant torque level, the level corresponding to the torque selection signal.