bryan@marlin.NOSC.MIL (Dale Bryan) (06/06/91)
does anybody know of a dc brushless motor controller (120V) that is efficient and acoustically quiet? we are currently using 3/4 hp dc brushless motors with built in motor controllers to power an underwater vehicle's thrusters. the problem is that these controllers are radiating acoustic noise at the pwm frequency and its harmonics into the ocean. this interferes with acoustic sensors on board the vehicle operating within those frequency bands. thanks in advance dale bryan