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    • 28. 发明授权
    • Motor driving circuit
    • 电机驱动电路
    • US08084973B2
    • 2011-12-27
    • US12161912
    • 2007-01-22
    • Hiroaki Hayashi
    • Hiroaki Hayashi
    • H02H7/09
    • H02P1/22H02P7/04H02P7/29
    • A motor driving circuit generates pulse driving signals, and controls the ON/OFF state of a switching circuit connected to a coil of a motor which is to be driven, thereby controlling the conduction period of the motor. A driving signal generating circuit generates the driving signals such that they are pulse modulated according to the torque target value for the motor, and outputs the driving signals to the switching circuit. A current detection circuit detects the current flowing through the coil of the motor. A current limiting circuit controls the logical values of the driving signals generated by the driving signal generating circuit such that the current detected by the current detection circuit does not exceed a predetermined current upper limit. The current limiting circuit increases the current upper limit according to the time elapsed in the starting operation of the motor. After the starting operation of the motor, the current upper limit is set to a predetermined fixed value.
    • 马达驱动电路产生脉冲驱动信号,并且控制与要被驱动的马达的线圈连接的开关电路的导通/截止状态,从而控制马达的导通周期。 驱动信号发生电路产生驱动信号,使得它们根据电机的转矩目标值进行脉冲调制,并将驱动信号输出到开关电路。 电流检测电路检测流过马达线圈的电流。 电流限制电路控制由驱动信号发生电路产生的驱动信号的逻辑值,使得由电流检测电路检测的电流不超过预定的电流上限。 电流限制电路根据电动机启动时间经过的时间增加电流上限。 在电动机的起动操作之后,将电流上限设定为预定的固定值。