| 摘要 |
Method for control of stepper motor operations by using double loop circuit under bridge arrangement connected with each wiring of the motor, with four keys switched on in alternating pairs, with four diodes, a measuring resistor and a comparative block and entering into the comparative block the two mutually differentiated voltage values, and then switching off the supply voltage with one of the keys from an alternating, originally switched on pair of keys, characterised in that besides the attributed voltages (Ur) and (Uh), an additional voltage (Ur1), higher than the (Ur) voltage is entered into the comparative block (BP) and compared with the voltage drop (Up) on the measuring resistor (Rp) and at the moment when the voltage drop (Up) reaches the threshold value determined by voltage (Ur1) the supply voltage(Um) is being at the same time isolated by using one of the alternating pairs of keys (K1) and (K4), or (K2) and (K3).<IMAGE>
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