| 摘要 |
PROBLEM TO BE SOLVED: To enable driving of a synchronous motor to be continued for emergency evacuation even when an analog angle data converter for detecting a rotation angle of the synchronous motor is broken down in a driving system where one synchronous motor is used as a driving source without being paired with a synchronous generator.SOLUTION: A semiconductor device comprises a digital angle data converter for converting digital data created by an analog-digital converter to digital angle data in addition to an analog angle data converter for converting an analog sense signal output from a rotation angle sensor of a synchronous motor to digital angle data. When the analog angle data converter is broken down, digital rotation angle data used for control of a drive circuit for creating a motor drive control signal of the synchronous motor is switched from data created by the analog angle data converter to data created by conversion by the digital angle data converter of conversion result data of the analog sense signal, which is obtained by the analog-digital converter. |
