S.V. Nakhe is a scientific officer with the Center for Advanced Technology, Indore, India. He received a BE from Walchand College of Engineering, Sangli, Shivaji University, India, and an MS in engineering from the Indian Institute of Science, Bangalore, India. Email address: nakhe@cat.ernet/in
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October 13, 2005[Ideas For Design] Smart Solenoid Driver Reduces Power Loss
Solenoids and relays used in electronic control applications consume lots of power. The current required for activation is typically three to 10 times higher than the minimum needed to hold the relay or solenoid in the ON position. Thus, reducing the driver's operating current after the solenoid or relay is switched ON will save power and reduce thermal loading. The technique presented here substantially reduces power dissipation when the device is ON. The circuit employs an op...
