Subject:
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RE: diodes in h-bridge
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 21 Apr 1996 04:07:54 GMT
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Original-From:
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Chuck McManis <CMCMANIS@NETCOM.avoidspamCOM>
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Viewed:
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2127 times
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When the motor power is removed, the motor generates a reverse voltage.
This voltage can damage the transistors, the diodes provide a conductive
path back to the power supply to absorb these spikes. Convieniently,
N-channel MOSFETs (and other mosfets) have a parasitic diode that
provides the same function.
--Chuck
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> From: Jeff Keyzer
> To: handyboard@media.mit.edu
> Subject: diodes in h-bridge
> Date: Saturday, April 20, 1996 1:41 AM
>
> What do the diodes across Q1-Q4 do, in Chuck's h-bridge design? I
> haven't figured that out yet....
>
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