Sunday, July 6, 2014

Re: [Electric Boats] Re: phasing into electric drive

 

Hi Art, It may be simpler to have a switch to bypass the resistor once you are going. I think you said initially you may consider a brushless motor in the future. Keep in mind that you cannot run a brushless motor without an expensive controller. That is the main reason I chose a brush type. I want to be able to bypass the fancy stuff if it blows up while I am out. Brushless motors use fancy electronic controllers to replace the brushes and can't live without them.
To affect the quality of the day, that is the highest of arts. Thoreau
On 07/06/2014 04:11 AM, 'J&A,.' jortlif@msn.com [electricboats] wrote:
 

Thanks to all for the great information on MOFSET PWM controllers. All make sense. Pretty clear that the way to go when I need more current or voltage than the controller can handle is to bypass the controller and just use high current switches or solenoids. This is sort-of the setup I have now. As I mentioned I have been using a homemade drop resistor to ramp up the current when first engaging solenoids. Can anyone recommend a simple solid-state device or circuit that will ramp up the starting current over a few seconds to avoid the resistor? Don't really see the need for a high power controller when solenoids and a few extra 12 volts batteries can do the job simply.
Thanks again
Art

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