PWM an electromagnetic (A/C) clutch?

[Stephen Andersen]

How about PWM a bypass valve instead?  I have been considering
this as an option for my project once I get the basics 
worked out.

It will cost you a bit in parasitic HP to "over"drive
the blower, but with the right bits, you could have 
cockpit adjustable boost control!

Then use the clutch just to "switch off" the SC when the 
bypass is open in steady state low-load operation...

Steve


> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Daniel Houlton
> Subject: PWM an electromagnetic (A/C) clutch?
> 
 
> Any thoughts on how an A/C type clutch would like being
> PWM'd?
> 
> I've been thinking about the clutch used on the supercharged
> MR2.  It's similar to an A/C clutch.  I've got an Eaton M90
> installation just about completed and was toying with the
> idea of using an electric clutch on the pulley to limit boost
> and/or have a 'valet' mode.
> 
> In theory, you could PWM the clutch to limit SC rotor speed
> to get any boost level you want up to max boost.  Not sure
> how it would work in reality though.  Seems the clutch 
> would maybe over-heat, or just wear out as they're not 
> really designed for modulation.
> 
> Any thoughts?
> 
> 
> thanks
> --Dan
> houlster at inficad.com
> 

----- End of forwarded message from owner-diy_efi at diy-efi.org -----
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