Answer by Tom Anderson for High side regulation of current for proportional...
Don't expect a relay coil to act like a linear inductor. The relay coil will have an iron core, and when properly designed, it should saturate. The details of the saturation curve will be temperature...
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The flyback current should be inside the current sense loop. This is a legitimate part of the solenoid current. Not measuring it gives bad input to the controller.Another source of non-linearity with...
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High side regulation of current for proportional valve
I'm working with a circuit which is regulating the current over a generic, proportional solenoid valve (L1 in the schematic below). The characteristics of the valve coil is unknown/will vary and the...
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