Did you try isolation of the armature and field circuit?
On Monday, July 22, 2024 at 04:59:37 AM GMT+8, Cor van de Water via EV
<ev@lists.evdl.org> wrote:
New should be infinite Ohms, because brushes are mounted isolated. The
carbon dust covering the isolated material between brush and metal
connected to the enclosure, is what causes the leakage.
On Sun, Jul 21, 2024, 1:47 PM John Lussmyer via EV <ev@lists.evdl.org>
wrote:
> I just went a spent a while crawling around under the truck using lots
> of compressed air through the motors. yeah, quite a bit of dust blew out.
> BEFORE cleaning, I measured 12.5 ohms from a field post to the case.
> AFTER cleaning, it went up to 13.4 ohms.
> Still seems WAY WAY lower than it should be.
>
> Anyone have a new, never used, Impulse 9" motor they could measure the
> resistance on?
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