公开(公告)号：US20150123576A1

公开(公告)日：2015-05-07

申请号：US14597385

申请日：2015-01-15

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Minoru KUROSAWA ,  Yuki MATSUYA

IPC: H02P25/02

CPC classification number: H02P25/028 ,  G11B5/5534 ,  H02P25/034

Abstract: When a motor drive control device is integrated in a semiconductor integrated circuit having a small chip area, calibration for improving the accuracy of detection of a counter electromotive voltage, which is for detecting the speed of a motor, is enabled. A first multiplier performs multiplication between a drive current detection signal and first gain information in a first register. A subtractor performs subtraction between a drive voltage command signal and a first multiplication result in the first multiplier. A second multiplier performs multiplication between a subtraction result in the subtractor and second gain information in a second register to generate counter electromotive voltage information as information on a second multiplication result. The drive voltage command signal in a control unit is set to a predetermined value to generate a condition which maintains the speed of the motor and a counter electromotive voltage at substantially zero.

Abstract translation: 当电动机驱动控制装置集成在具有小芯片面积的半导体集成电路中时，能够提高用于检测电动机速度的反电动势电压的检测精度的校准。 第一乘法器在第一寄存器中执行驱动电流检测信号和第一增益信息之间的乘法。 减法器在第一乘法器中执行驱动电压命令信号和第一相乘结果之间的减法。 第二乘法器在减法器的减法结果和第二寄存器中的第二增益信息之间进行乘法，以产生作为关于第二乘法结果的信息的反电动势电压信息。 控制单元中的驱动电压指令信号被设置为预定值，以产生维持电动机的速度和基本为零的反电动势的条件。