Four controls from Bodine Electric (Northfield, IL) provide speed control for low-voltage 12 or 24V permanent magnet DC (PMDC) gearmotors and motors (up to 1/3 HP/250 Watts). The controls utilize pulse width modulation (PWM) technology for quiet operation, low operating temperature, and optimal brush life. The controls feature five trim pots to adjust min/max speed, torque (current) limit, and acceleration time. In addition, DIP switches allow the user to match a motor/gearmotor to the controls. System speed may be controlled with a single-turn speed pot, or an isolated 0-5 VDC remote signal. Models are available with either 1⁄4" quick connect tabs or a plug-in terminal block. The type WPM low-voltage motor speed controls are suited for portable or remote applications where connection to an AC line is not possible. Typical applications include accessories on electric vehicles, mobile medical equipment, solar powered devices, chemical injection pumps at oil wells, and automatic gate openers.

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Motion Control & Automation Technology Magazine

This article first appeared in the December, 2012 issue of Motion Control & Automation Technology Magazine.

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