I want to control an electromagnetic brake (fail-safe brake) used along with servo motor. Microcontroller will control the trigger signal for the electromagnet coil.
Overexcitation voltage - 24V, 1A for 200ms.
After 200ms the voltage step down to 8V with current consumption of 0.3A. Please refer the waveform images below.
The brake coil cannot sustain high current for long time so we provide momentary high voltage to excite the coil and then reduce the voltage to hold electromagnet to its state.
The solution that popped-up to my mind is to use a Timer circuit which will provide the required 24V for 200ms and then switch to 8V using a relay. But as the trigger signal generated is a continuous signal (not a trigger pulse) so I don't know if this solution will work well for required functionality. Please suggest any other optimized approach.