What is it about?
Controlling the current through a Peltier junction to create a thermostat with a control loop that takes into account the varying efficacy of the Peltier junction, in terms of Watts transferred per amp of drive current, as the temperature difference across the Peltier junction change
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Why is it important?
It used a cheap 20-bit sigma-delta analog to digital converter, it provided a current-to-heat transfer relationship for the Peltier junction, and it exploited a cheap microprocessor to sort out the non-linearities in the over-all transfer function.
Perspectives
The paper described a commercial development designed to solve a specific temperature control problem. I was able to link it back to earlier publications that had tackled much the same problem, in much the same way, but with earlier components. Making the best use of the Peltier junction as either a heat sink or heat source posed some problems that hadn't been sorted out in the literature I'd been able to get at.
Bill Sloman
IEEE
Read the Original
This page is a summary of: A microcontroller-based driver to stabilize the temperature of an optical stage to within 1 mK in the range , using a Peltier heat pump and a thermistor sensor, Measurement Science and Technology, November 1996, Institute of Physics Publishing,
DOI: 10.1088/0957-0233/7/11/015.
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