Method for controlling a stepping motor, and the control arrangement for the stepping motor

摘要

In order to control a stepping motor, when a switching signal is supplied, the motor winding is supplied with a high voltage, which is above the rated voltage, until the current in the winding reaches a predetermined value. A further signal causes the motor winding to be supplied further until the current reaches its maximum value when this(?) is less than the predetermined minimum value. For this purpose, the control arrangement has two complementary transistors and the resistor in the supply circuit of the motor winding. The switching input signal is applied to the base of one of these transistors. The magnitude of the voltage drop on the resistor is supplied to the input of the comparator using positive feedback, a reference voltage being applied to its second input. The output of the comparator is connected to the base of the second transistor. The motor winding is connected to earth via the diode. A higher stepping speed of the stepping motor and control of the torque as a function of the operating conditions are achieved.