Schottky diode

[Ian GardnerParticipant @iangardner62867]

Hi everyone,

I have a Graupner V35 ESC which I am preparing to install in a boat and the instructions require me to connect a Schottky diode across the motor terminals- the diode is supplied. I know there was some mention of this type of diode with regard to parallel battery packs recently but my question is- what is the purpose of this diode in this position and what might be the consequence of not using it? I have never had to do this with other types of ESC so I’m confused.

Perhaps someone who has experience of these types of ESC could help.

 

Ian Gardner

 

[Ian GardnerParticipant @iangardner62867]

use with Graupner V35 ESC

[60wattParticipant @60watt]

The purpose of the diode is well documented on the internet.Search flyback diode

 

There will be no great difference in omitting a Schottky diode as the v35 has a brake and therefore it already has a standard diode in situ.A diode with the current rating of three amp and voltage rating of a few volts above the battery will be fine.The cathode,marked by a band, is goes to the motor positive.An image search turned up photo 1. in this

[Ian GardnerParticipant @iangardner62867]

Hi,

Thanks for those links. I think I understand the purpose of the diode now. It seems to me that it would be best to include it even though there is a diode in the V35  just to be safe.

I wasn’t aware of this phenomenon of reverse voltage during the off phase of ESC’s and the need to protect circuitry with a diode- something else learnt.

Thanks for your help.

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