SEMICONDUCTOR DEVICE AND DRIVING APPARATUS

摘要

In a drive system using a single synchronous motor which is not paired with a synchronous generator, even if a failure occurs in an analog angle data converter for detecting the rotation angle of the synchronous motor, the driving of the synchronous motor can be continued in a temporal emergency manner. In addition to an analog angle data converter for converting an analog sense signal which is output from a rotation angle sensor of a synchronous motor to digital angle data, a digital angle data converter for converting digital data generated by an analog-to-digital converter to digital angle data is provided. In the case where the analog angle data converter fails, digital rotation angle data used for control of the drive circuit which generates a motor drive control signal for the synchronous motor is switched from data generated by the analog angle data converter to data generated by converting conversion result data of the analog sense signal by the analog-to-digital converter, by the digital angle data converter.

主权项

1. A semiconductor device comprising:
a drive circuit generating a motor drive control signal for a synchronous motor; an analog angle data converter receiving an analog sense signal which is output from a rotation angle sensor of the synchronous motor and converting the analog sense signal to digital angle data; an analog-to-digital converter converting an analog signal to a digital signal; a digital angle data converter receiving the digital data generated by the analog-to-digital converter and converting the digital data to digital angle data; and a control circuit making the drive circuit generate a motor drive control signal according to a drive instruction on the basis of the digital angle data, wherein in response to a failure in the analog angle data converter, the control circuit further performs a control of switching digital rotation angle data used for control of the drive circuit from data generated by the analog angle data converter to data generated by converting conversion result data of the analog sense signal obtained by the analog-to-digital converter, by the digital angle data converter.