KBWD-13 KB Electronics Whisper-Drive PWM DC Motor Speed Control, 8609

The KBWD Pulse Width Modulated (PWM) DC motor speed control provides excellent dynamic response to load variations. The efficient PWM waveform produces an almost pure DC current to the motor (form factor < 1.05) which has several advantages over a conventional SCR control. The PWM significantly lowers audible motor noise and provides longer brush life. It also produces less motor heating which allows a smaller, less costly motor to be used for most applications. Another advantage of PWM is higher output voltage which provides increased output speed. In addition, pulse-by-pulse current sensing provides short circuit protection and prevents control damage due to shorted motors.

A unique feature of the KBWD control is the Plug-in Horsepower Resistor®. It eliminates the need for recalibrating IR Comp and Current Limit when the control is used on various horsepower motors. The control contains armature feedback which provides excellent load regulation.

The control contains quick disconnect terminals as standard. A potentiometer (5K), isolated analog signal (0-5 VDC), or PWM microprocessor output can be used to vary the output of the control.

• Plug-in Horsepower Resistor® automatically calibrates IR Comp and Current Limit (CL)


• Short Circuit Protection


• Under Voltage Protection


• Inhibit Circuit

• Minimum Speed (MIN)


• Current Limit (CL)


• IR Compensation (IR)


• Maximum Speed (MAX)