How to save two Mitsubishi M2896 drive (spindle motor smoked!)
cclist at sydex.com
Sun Mar 1 14:27:00 CST 2015
On 03/01/2015 11:53 AM, tony duell wrote:
> Are there any discrete transistors for this? I know the diagram in the
> service manual shows them, but that is a different version of the motor
> and the LB1620 can normally drive the windings directly. I don't remember
> seeing them in the photos.
I found the datasheet for the LB1620 and apparently the thing is
perfectly capable of directly driving the motor windings. I note that a
small (10uF to 47uF) electrolytic is specified between each of the
windings and +24 Vcc. Were one of those to short, that would indeed
have nasty consequences as the output of the LB1620 is via a
complementary pair operating totem-pole fashion for each phase.
So, in absence of a readily available LB1620, I'd start with the
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