Hi Brooke,

There are at least two types of injectors - constant voltage and
constant current. Constant voltage types don't use any series elements
other than the switch device. But everything else you said about them is
true.

Best regards, Bob

On Sat, Feb 28, 2015, at 03:01 PM, Brooke Clarke wrote:
> Hi:
>=20
> Electromagnets, like I think are in the injectors, have both resistance
> and inductance.
> For proper function I expect they use high voltage drive with series
> resistance in the circuit added to shorten the L/R=20
> time constant.

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