T-Pain Is On A Boat: Re: [Electric Boats] Minnkotas

Monday, June 17, 2013

Re: [Electric Boats] Minnkotas

You can see any of the MK's in exploded parts view here,

http://www.northlandmarine.com/MinnKotaQuickRef.htm

You can also purchase parts and they do have just the controllers if you are interested in building a PWM for a resistor motor.

http://www.northlandmarine.com/MinnKotaQuickRef.htm#anchor_Cntrl_Brd_Switches

The control boards are usually in the foot controller or in the head itself, not below the water line.
Just a note for those modding these things. The motor is open to the support tube. If you leave the tops of the tube open it will quickly fill the motor up with water. Keep the tube sealed up!

mattelderca

From: Dennis Wolfe <wolfeboats@gmail.com>
To: electricboats@yahoogroups.com
Sent: Monday, June 17, 2013 11:15:50 AM
Subject: Re: [Electric Boats] Minnkotas

Aren't the FETs underwater in the nose cone of the motor?

My resistor control motor got hot too and I know the resistors are down in the motor. not in the head.

On 6/17/2013 11:08 AM, Carel Ruysink wrote:

Big chance the heat is coming from the FETs that controll the current, they can and will get rather hot, if you suspect the connectors (wich is possible) it is cheaper and quicker to solder them.

Only think of goldconnectors if you disconnect them rather frequently in harsh conditions (or high end audio) IMHO.

BTW The powercontrol im PWM (Pulse With Modulation) is by variing the time on/time of WITHIN one cycle of the the used frequency.

More sofisticated controllers also vary the frequency from low power to high power to overcome some unwanted habits of the controller. Irritating humming at low power and heatproduction from the many induced startpulses (what is the correct english technical frase?)

Carel

----- Original Message -----

From: Dennis Wolfe

To: electricboats@yahoogroups.com

Sent: Monday, June 17, 2013 4:11 PM

Subject: Re: [Electric Boats] Minnkotas

The heat you are feeling in the head is resistance losses from the cheap connectors. These can be replaced with gold plated bllet connectors for a few dollars. If your 'experimental' prop draws less or rhe same amps as the stock setup with the boat tied to the dock you are good for long term life.

Again, I was able to double range on my 18' sailboat by fairing the motor tube and using a 10x6 prop.
On Sunday, June 16, 2013, oak wrote:

FYI... When I did my testing on the Traxxis 80 Minn-Kota, I noticed that the control head got pretty darn hot to the touch after running for about 45 min at mostly 75% to 100% speed. So be careful! :)