I am searching for an inexpensive option to drive a magnetic coil with a frequency in the range of 1 Hz to 1 kHz. DC audio amplifiers, such as a Crown 300A-DC Series II or a Mitsubishi DA-A15DC, are perfect for this purpose.
However, is there still any company producing these devices? Or are there alternatives for driving an ~8 ohm inductive load in the given frequency range with up to approximately 300 W power?
Note that I don't worry about drift since my system is feedback controlled by measuring the magnetic field.
Best Answer
A full-H driver for a stepper motor coil does exactly this. They are available as analog types or using switch mode (PWM) drive. Probably a lot less expensive than a Crown DC-300A.
Have a look at this: https://www.robotshop.com/en/simple-h-20a-5v-28v-r-c-dc-motor-driver.html