Patent ID: 9071184
Filing Date: 2015-06-30
Classification: H02P

Abstract:
1. A motor driving system for controlling a synchronous motor, the motor driving system comprising: a DC power supply; a power converter converting a DC power from the DC power supply into an AC power through and delivering the AC power to the motor; a control device for controlling the power converter; a sensorless control algorithm device that generates a magnetic pole position estimated value of the motor; a first abnormality determining means that determines abnormality in the sensorless control algorithm device; a magnetic pole position detecting means attached to the motor; wherein, in a normal state of the sensorless control algorithm device, the control device controls the power converter using the magnetic pole position estimated value, and when the first abnormality determining means determines abnormality in the sensorless control algorithm device, the control device controls the power converter using the magnetic pole position detected value in place of using the magnetic pole position estimated value.