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    • 3. 发明公开
    • BRUSHLESS MOTOR DRIVE DEVICE
    • ANTRIEBSVORRICHTUNGFÜRBÜRSTENLOSEN电机
    • EP3136583A1
    • 2017-03-01
    • EP15800076.0
    • 2015-03-05
    • Panasonic Intellectual Property Management Co., Ltd.
    • SATO, Daisuke
    • H02P6/16
    • H02P6/28G05B19/409G06F1/04G06F11/1604H02P6/18H02P21/22H02P23/00H02P29/04
    • A brushless motor drive device includes the following: an inverter circuit configured to energize and drive the winding of a brushless motor; a current detection circuit configured to detect the current value of the winding; a control unit configured to control the rotation of the motor; and an RC filter including a resistor and a capacitor. The control unit includes the following: a drive control unit configured to generate a signal to drive the inverter; a clock generation circuit configured to generate a clock pulse to be used as a reference for an operation period; a pulse output circuit configured to generate a pulse signal with a changing frequency based on the clock pulse and to apply the pulse signal to the RC filter; an AD converter circuit connected to the capacitor of the RC filter and the current detection circuit; and an AD-conversion-error calculation unit configured to calculate the conversion error of the AD converter circuit. The AD-conversion-error calculation unit calculates the conversion error based on the difference between the output value of the AD converter circuit produced in response to an input of the voltage of the capacitor and an AD-converted value calculated from the charging time of the capacitor.
    • 无刷电动机驱动装置包括:逆变器电路,被配置为对无刷电动机的绕组进行通电和驱动; 电流检测电路,被配置为检测所述绕​​组的电流值; 控制单元,被配置为控制电动机的旋转; 以及包括电阻器和电容器的RC滤波器。 控制单元包括:驱动控制单元,被配置为产生驱动逆变器的信号; 时钟生成电路,被配置为生成用作操作周期的基准的时钟脉冲; 脉冲输出电路,被配置为基于所述时钟脉冲产生具有变化频率的脉冲信号,并将所述脉冲信号施加到所述RC滤波器; 连接到RC滤波器的电容器和电流检测电路的AD转换器电路; 以及AD转换误差计算单元,被配置为计算AD转换器电路的转换误差。 AD转换误差计算单元基于响应于电容器的电压的输入而产生的AD转换器电路的输出值与从该电容器的充电时间计算的AD转换值之间的差计算转换误差 电容。