Author Topic: Power a windshield wiper motor  (Read 3465 times)

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Offline jayala1985Topic starter

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Power a windshield wiper motor
« on: September 21, 2012, 10:35:04 AM »
Im looking to create what is found on animatronicsign.com, I need it to be mobile and run for 10 hours.  I planned on using a windshield wiper motor connected to a deep cycle batter but not sure on amps that the motor is drawing.  Really need to complete build on a budget any suggestions on best motor/mobile power supply combination.  It also needs to be rechargeable.  Thank you Im a first time builder and on a budget and time crunch.

Jason
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Offline newInRobotics

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Re: Power a windshield wiper motor
« Reply #1 on: September 21, 2012, 12:09:00 PM »
Measure resistance of motor windings and derive current draw using Ohm's Law  ;)
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Offline waltr

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Re: Power a windshield wiper motor
« Reply #2 on: September 21, 2012, 06:03:05 PM »
Quote from: newInRobotics on September 21, 2012, 12:09:00 PM
Measure resistance of motor windings and derive current draw using Ohm's Law  ;)
For the peak or stall current. The running current will be less and will vary depending on the load.

To measure the running current place a small value, high wattage resistor in series with the motor/battery. Then measure the voltage drop across the resistor and calculate the current with Ohm's Law.
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Offline newInRobotics

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Re: Power a windshield wiper motor
« Reply #3 on: September 22, 2012, 03:42:52 PM »
Quote from: waltr on September 21, 2012, 06:03:05 PM
To measure the running current place a small value, high wattage resistor in series with the motor/battery. Then measure the voltage drop across the resistor and calculate the current with Ohm's Law.
This is much better way. Totally forgot about it.
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