FIELD: electricity.
SUBSTANCE: vector control device for synchronous motor with constant magnet, which is brought into action with an inverter, includes the following: unit (10) for shaping current command in order to shape command id* of current along d axis and command iq* of current along q axis from this command T* of torque moment; current control unit (20) acting so that motor current coincides with current command. Current command shaping unit includes the following: unit (11) for shaping the main current command along d axis in order to shape the first main current command id1* along d axis by using torque moment command; unit 12 of limiter for input of current command id1* and output of the value limited below zero, as the second main current id2* command along d axis; unit (14) for compensation of current command along d axis for output of id2* command of current corrected in compliance with value dV of current command compensation along d axis, as command id* of current along d axis; and unit (15) for shaping current command along q axis for shaping iq* command of current along q axis from id* command of current along d axis. It is possible to shape id* command of current along d axis and iq* command of current along q axis, which allow implementation of control of maximum torque moment by using the expression with easy operation.
EFFECT: simplifying the control of maximum torque moment in the vector control device.
9 cl, 4 dwg
