Alt-BEAM Archive
Message #01123
To: "'Steven Bolt'" sbolt@xs4all.nl
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Mon, 1 Mar 1999 14:04:34 -0800
Subject: [alt-beam] Re: pocket motor-tester / BEAM multi-meter
Or make the pulse width vary with respect to motor current ie a constant
current circuit.
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: Wilf Rigter [SMTP:Wilf.Rigter@powertech.bc.ca]
> Sent: Monday, March 01, 1999 1:28 PM
> To: 'Steven Bolt'
> Cc: beam@corp.sgi.com
> Subject: RE: pocket motor-tester / BEAM multi-meter
>
> The stored energy goes up with the square of the voltage ie double the
> volts
> = four times the energy. Now add some variable PWM to "regulate or shape"
> the output current and it is possible to optimize the electrical to
> "useful"
> mechanical energy conversion. This could be a small mod to the PWM
> circuit
> in
>
> http://www.xs4all.nl/~sbolt/Images/smdFotovoor_schema.gif
>
> to increase the duty cycle of the oscillator inversely proportional to the
> supply voltage. Interesting to see the evolution of the circuit since
> 1996.
>
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
>
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