BRUSHLESS DOUBLY-FED INDUCTION MACHINE CONTROL

摘要

Processor-based field oriented control for brushless doubly-fed induction machine (60) having first and second polyphase stator windings (S1, S2) is programmed to operate the machine (60) in various modes, as a motor or generator, with bumpless switching between operating modes. Electronic power converter (143) controls a current supplied to the first stator winding (S1) to control the torque of the machine (60), with the second stator winding (S2) selectively connected to an AC line. Stationary coordinates for in-phase and quadrature current commands are coordinate transformed using a voltage vector for voltage induced on the first polyphase stator winding (S1) to control current in the first stator winding (S1) with or without a position sensor. Electronic power converter (143) controls the voltage supplied to the first stator winding (S1) for generating, with the second stator (S2) selectively connected to a load. Machine (60) can also be controlled to operate as a singly-fed motor at lower speeds, with the second stator winding (S2) shorted.