| 摘要 |
The circuit arrangement produces stepping pulses (SI) by means of which a movement of the stepping motor (SM) is achieved in the optimum load-angle range. The stepping pulses (SI) are formed at points in time (t0, t1) - corresponding to the start of the acceleration - from a number of start pulses, which follow one another at a short interval (t0-t1), and subsequently, at the start of the acceleration after the point in time t2, from a plurality of control pulses. These control pulses are in each case always emitted whenever the rotor of the stepping motor has rotated through a stepping angle ( alpha ). In this way, the acceleration of the stepping motor takes place with the maximum dynamic torque. The stepping pulses are produced by means of a read-only memory (SP) in which data words (DW) associated with the respective characteristic are stored. The data words (DW) determine the division ratio of a frequency divider (FT) which produces the stepping pulses (SI) from clock pulses (T) at a predetermined repetition frequency. <IMAGE> |
