I/O isolated H-Bridge Driver 60VDC/16A, 24Vcc, DIR and EN controls

♪ Turn my motor on ♪ We're demonstrating an isolated H-bridge motor control with non-contact TMR angle and current sensors. With the full H-bridge, we can reverse the motor or generate AC. So here we're ramping the speed up and down and reversing the motor. A magnetic brake provides some loading. The PWM frequency is about 500 hertz, which is the B4 (B above middle "C") tone you're hearing on start-up. The current sensor is bipolar, so it measures positive or negative current. Let's look at closed-loop motor control. Right now we're running open-loop... ...so of course the motor slows down when we apply a load. This switch turns on closed-loop proportional-integral speed control, which adjusts the motor voltage to keep the speed close to the 2000 RPM set point as mechanical loading decreases... and increases... We could just as easily control the motor current to keep torque-- rather th