PWM Motor Driver

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Pulse width modulation is commonly used for motor speed control. Motor speed is controlled by a high current PWM pulse driver.

Pulse Width Modulation Motor Driver

Pulse width modulation (PWM) is a commonly used to for motor speed control. Instead of constant DC voltage, PWM speed control technique uses pulse voltage to drive the motor. The motor speed is controlled by varying the pulse duty cycle. 100% duty cycle is the maximum speed and 0% duty cycle the motor is stopped.

Table 1. Pulse Width Modulation Electric Motor Driver Selection Guide


Voltage Range

Peak Reactive Current (Note 1)

Peak Resistive Current (Note 2)


-10V to + 10V

 0 – 4.0A

 0 – 5.0A


-20V to + 20V

0 – 2.8A

0 – 3.8A


0V to + 15V

0 – 3.5A

0 – 4.5A


-10V to + 10V

0 – 5.0A

 0 – 6.0A


-20V to + 20V

0 – 3.1A

0 – 4.4A


-30V to + 30V

0 – 2.1A

0 – 3.0A


-40V to + 40V

0 – 1.7A

0 – 2.5A


-6V to + 15V

0 – 4.0A

 0 – 5.0A


-6V to + 30V

0 – 2.1A

0 – 3.0A


-6V to + 45V

0 – 1.7A

0 – 2.5A


-6V to + 65V

0 – 2.1A

0 – 2.5A

Our waveform amplifier family of products are high-current drivers for electric motors. They can output high current, or high power, or high voltage, or any combination to driver electric motors. Our products offer voltage range up to 65V, or 5A current, or 70 watt in power. Use Table 1 below to select the best voltage and current for driving motor.

Selecting an PWM Motor Driver

AC Helmholtz Coil Field

AC Magneti Field Using a New Resonant

Series Resonant for High-Frequency Electromagnet

AC Magnetic Coil Design Resources

Resources for Helmholtz Coils Design

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