초록 ▼

A synchronous motor control system for preventing a torque efficiency reduction on high-speed rotation and acceleration to produce a torque efficiently at all times. The synchronous motor control system detects when inverter drive signals for controlling currents supplied to the synchronous motor ex

A synchronous motor control system for preventing a torque efficiency reduction on high-speed rotation and acceleration to produce a torque efficiently at all times. The synchronous motor control system detects when inverter drive signals for controlling currents supplied to the synchronous motor exceed a physical saturable quantity of an inverter, and corrects current waveforms applied to the synchronous motor to make sure that they are sine waves at all times.

대표청구항 ▼

A synchronous motor control system for controlling a synchronous motor, comprising: a detector, coupled to the synchronous motor, for detecting a rotational angle of the synchronous motor; a control circuit, coupled to said detector, for generating a sine value corresponding to the rotational angle

A synchronous motor control system for controlling a synchronous motor, comprising: a detector, coupled to the synchronous motor, for detecting a rotational angle of the synchronous motor; a control circuit, coupled to said detector, for generating a sine value corresponding to the rotational angle detected by said detector and for multiplying an effective current command by the sine value to produce an inverter drive signal in each phase; and an inverter, having a physical saturable quantity and coupled to said control circuit and the synchronous motor, for providing current commands to armature windings of the synchronous motor in dependence upon the inverter drive signals from said control circuit, said control circuit determining, for each phase, when the corresponding inverter drive signal is in excess of the physical saturable quantity of said inverter in that phase, and correcting that phase of the inverter drive signal which is provided to said inverter by a correction quantity, said control circuit correcting the inverter drive signals in the other phases based on the correction quantity, said control circuit executing the corrections so that the waveforms of the current commands provided to the armature windings of the synchronous motor are always sine waves.