Thermoelectric cooler control circuit

Details Thermoelectric cooler control circuit Thermoelectric cooler control circuit

1998-09-14

2000-08-01

Bennett, Henry

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

622592, F25B 2102

Patent

active

06094918&

ABSTRACT:
A thermoelectric cooler (TEC) is used to maintain an electronic component, for example, a laser diode, at a set temperature. A thermistor senses the temperature of the laser and through a first control loop causes current to be passed through the TEC so as to adjust the laser temperature. As the temperature of the hot side of the TEC increases above the temperature of the cold side of the TEC, the TEC's cooling efficiency gradually decreases. This is compensated for by adding a second control loop which senses the TEC current and provides an additional gain proportional to the TEC current in the cooling sense. This additional gain is added to the gain provided by the first control loop. The result is a stable, highly responsive temperature controller at all points of the TEC operating range.

REFERENCES:
patent: 4631728 (1986-12-01), Simons
patent: 5043992 (1991-08-01), Royer et al.
patent: 5515682 (1996-05-01), Nagakubo et al.
patent: 5604758 (1997-02-01), Auyeung et al
patent: 5690849 (1997-11-01), DeVilbiss et al.
patent: 5704213 (1998-01-01), Smith et al.

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