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|02-13-2015, 10:25 AM||#14|
Join Date: Sep 2012
Location: Charlotte, NC
Re: slow cart
In a Series Motor the one thing that can cause slow speed up hill is current/voltage starvation at the motor.
As it was suggested, it can either come from weak batteries or High resistance caused by poor connections or corroded cables.
It is easy to check the pack voltage if You have a digital voltmeter on your dash or just use a regular voltmeter set to 200vDC and attached to the pack positive and negative.
Drive up the hill in question and notice how low the pack is dropping.If the pack voltage goes not drop excessively, the issue may be on the cable/connections.
There are 2 places You need to check next for voltage drop.
1) Make sure the controller is delivering the same voltage you saw at the pack to the Motor.
Set your meter to 200vDC and measure the voltage on Controller B+ to M- (red probe on B+) when going up the same hill.If the voltage is about the same, You need to measure the voltage at the motor to see if the issue is in the FNR or cables
Set your meter to 200vDC and measure the voltage on the motor posts A1 to S1 (red probe on A1) when going up the same hill.If all the voltages are the same and are not excessively low, You may have a bad motor.
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