Field orientation control of a permanent magnet motor

摘要: A field orientation control system for an interior permanent magnet synchronous motor includes function generating means responsive to a torque command signal producing direct and quadrature axis current signals which are converted synchronously-varying two-phase coupling power means, effecting sinusoidal energization of the motor. The generators modify as predetermined parameters. Rotor position information is derived from measured stator voltages currents without use separate rotor sensor. establishing preselected amplitude α-axis in at start-up prior orthogonal β-axis such that caused become initially aligned with selected α-axis.