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| January 11, 2013
PWM Speed Controls
These 12 and 24 Volt units drive permanent magnet DC gearmotors and motors up to 1/3 hp.
Four new type WPM controls provide speed control for 12 or 24 V PMDC gearmotors and motors up to 1/3 hp/250 W. The controls use pulse width modulation (PWM) technology to insure quiet operation, low operating temperature and optimal brush life. They feature five trim pots to adjust min/max speed, torque (current) limit, and acceleration time. In addition, DIP switches allow the user to easily 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-inch quick connect tabs or a plug-in terminal block. The low-voltage motor speed controls are suitable 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. They have continuous output current ranges from 14 to 17 A, dependent on the model and 35 A peak, and are RoHS compliant and cURus certified.
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