Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: Terry on March 25, 2012, 01:47:14 pm

Title: Motor Polarity
Post by: Terry on March 25, 2012, 01:47:14 pm

I have a Permax 400 7.2v motor. The connection tags are clearly marked + and -. Would it hurt the motor, or seriously reduce it's power, if it was connected with the polarity reversed. I know that this is what happens when a boat is put into reverse, but that is normally only for short periods of time.

Cheers, Terry.

Title: Re: Motor Polarity
Post by: DickyD on March 25, 2012, 02:17:54 pm

Should be no problem, its what you do when using left and right handed props.

Title: Re: Motor Polarity
Post by: malcolmfrary on March 25, 2012, 08:07:11 pm

The marks are there to give you some clues as to which direction will turn, depending on the way round that you offer power.  Like DickyD said, its useful when setting up multiple motors.

Title: Re: Motor Polarity
Post by: Colin Bishop on March 25, 2012, 09:11:06 pm

Many motors do run slightly more efficiently in one direction than the other.

Colin