DEVICE FOR CONTROLLING ALTERNATING CURRENT ROTATING MACHINE

摘要

A control device of an AC rotating machine has control means (2) for receiving a current vector instruction and a detection current vector as inputs and outputs a voltage vector instruction to the AC rotating machine (1), alternating current amplitude computation means (5) for computing an alternating current amplitude of at least one of a parallel component and an orthogonal component with respect to the voltage vector instruction, alternating current amplitude instruction generation means (7) for generating an alternating current amplitude instruction from the current vector instruction, and magnetic-pole position computation means (6) for computing an estimated magnetic-pole position of the AC rotating machine (1). The magnetic-pole position computation means (6) computes the estimated magnetic-pole position so that the alternating current amplitude coincides with the alternating current amplitude instruction.