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  • Users: mwtucker
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  1. mwtucker

    Operate DC Motor on Full-Wave Rectified 120 V?

    Hi, I have DC "brushed" (i.e. it has 2 brushes) motor that is rated at 120 VDC. The full-load current is 3 amps. My questions relate to running this motor with a "simple" power supply. My first shot was to use a single rectifier (half-wave) to rectify the 120 VAC line. The motor runs, but...
  2. mwtucker

    Need Solid State Switch for 120VDC Motor

    I have a 120 VDC brushed motor that we have been switching on and off using an Omron G2RL-24-DC12 relay (contacts rated at 8A 250VAC, 8A 30 VDC). The relay contacts have been "sticking" occasionally, presumably from arcing as a result of switching an inductive load. The motor is being driven...
  3. mwtucker

    Voltage Across Motor Exceeds Applied Voltage??

    Hi, I have a DC motor (with brushes) that is designed to be operated on 120 VDC. I am taking the 120 VAC line voltage and rectifying it with a full-wave bridge. What I don't understand is that when I measure the DC voltage across the motor terminals (using a Fluke 87 multimeter on the DC volts...

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