dc motors turning too fast

[gjo]

On my troubleshooting chart it's says if your motor turns too fast it's probably that you have improper connections.What do they mean by improper connections?

 

[WimRFP]

Please provide us more details, as we are in guessing mode now.

 

[gjo]

It's in a.troubleshooting chart for DC motors and all it says is your motor runs too fast it is probably improper connections. I can't figure it out myself. Besides the motor controller not hooked up properly, I can't imagine what they mean.

 

[WimRFP]

Is that manual for a motor (what type of DC motor?), or a controller (with or without RPM feedback), etc? We don't know what you have in front of you.

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When a DC motor runs too fast:
reduced mechanical load,
increased supply voltage,
reduced field coil current,
For permanent magnetic motors, weakend permanent magnets (large mechanical shock, extreme heat).

These are just some things in case of a motor without RPM control loop

 

[garyson02]

some equipments have more than one voltage supply within them, so if it is connected to the wrong terminals, it may run too fast.