专利名称：Stepper motor control发明人：Robert Pulford, Jr.申请号：US09/323467申请日：19990601公开号：US06150789A公开日：20001121
摘要：In a preferred embodiment, a stepper motor control, including: a driver to drivethe stepper rotor; a detector to detect a commanded step rate signal provided to thedriver and to provide an output signal proportional thereto; a power control, responsiveto the output signal, to provide driving power to the driver, and to increase voltage tothe driver in proportion to an increase in magnitude of the output signal; and an over-current protection circuit that becomes active above a predetermined motor currentlevel and above a predetermined commanded step rate. Voltage control can be effectedeither on the drive board or by controlling the power supply. An additional featureprovides over- current protection for the stepper motor during a lock rotor (stall)condition. The stepper motor control produces very low levels of EMI/RFI as comparedwith PWM current control (chopper) drives.
申请人：TRI-TECH, INC.
代理人：John H. Crozier
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