/Products/VFD's & Soft Starters/KB Electronics/KBWD/KBWD-13 KB Electronics Whisper-Drive PWM DC Motor Speed Control, 8609
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Product ID: KB8609

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

MFG: KB Electronics, Inc
MFG Part Number: 8609

Available Stock: 7
Selected accessories will also be added to cart
$93.10 / Each
0-130VDC, 3.0 Amps @ 130VDC, 115VAC 50/60Hz Input


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.


Manufacturer KB Electronics
Part Number 8609
Model Number KBWD-13
AC Line Input 115 VAC
DC Output Voltage 0 - 130VDC
Max DC Output Current 3.5 Amps @ 100VDC
3.0 Amps @ 130VDC
Max Motor Power 0.33 HP
0.25 kW
Warranty 18 Month Limited Warranty


Output Voltage Range 0 - 130VDC
Speed Range 50:1
Operating Frequency Less than 16kHz
Form Factor More than 1.05 RMS/Avg Amps
Ambient Operating Temperature Range 0 to 45°C
Load Regulation 1% of Base Speed
Acceleration Range 2.5 Seconds
Fixed 0.2, 2.5, 7 or 10 Seconds
Min Speed Trimpot Range 0 - 40VDC
Max Speed Trimpot Range 80 - 130VDC
CL Range 0 – 200 % Range Setting
IR Compensation Range 0 – 25 VDC
AC Line Voltage Regulation 0.5 % Base Speed
Analog Input Voltage 0 - 5VDC
Speed Potentiometer 5K, 1/4W

Standard Features

  • Plug-in Horsepower Resistor® automatically calibrates IR Comp and Current Limit (CL)
  • Short Circuit Protection
  • Under Voltage Protection
  • Inhibit Circuit

Drive Options

  • Minimum Speed (MIN)
  • Current Limit (CL)
  • IR Compensation (IR)
  • Maximum Speed (MAX)