The multi-functional control system for DC motors from Kaleja Elektronik is a low-cost solution for users to electronically drive DC motors. An efficiency of max. 95 % is achieved based on the Mosfet technology. The motor speed can be controlled from zero to maximum speed by means of a potentiometer or an analogue input. In addition, change-over is possible between the set motor speed and 100 % motor speed at a digital input. The starting time (soft start) of the motors can be set from 0.1 to 5 s using trimmer Tr. 2 at the front of the control system. Trimmer Tr. 3 is used to set I x R compensation to the different motors, which means that – at varying load at the motor – I x R compensation tries to compensate the speed of the motor in order to achieve constant synchronism. Trimmer Tr. 4 determines the maximum admissible motor current. As soon as the set over-current is reached, a LED lights up at the front of the control system and the output at terminal 16 is switched from 0 V to VCC. If the current is switched off, the motor is switched off as soon as the set over-current is reached; the motor is limited to the set current if current limitation is selected.
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