TEC | PartQuest™ Explore

Copy of Laser Temperature Regulator using Peltier TEC - on Fri, 09/18/2020 - 10:42

DM_1
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This example shows the ability of a Peltier Module, or Thermo-Electric Cooler (TEC), to actively transfer heat away from a "laser" or other electronic device, during fast-changing power dissipation conditions. A thermistor, with resistance that is sensitive to temperature, is used in a Wheatstone Bridge configuration. It produces a differential voltage that is amplified by an op-amp circuit. The op-amp output voltage is approximately proportional to temperature, and 180 degrees out of phase.

The rest of the control loop is modeled here using ideal mathematical control blocks. This abstraction allows the designer to focus on the overall performance of the regulator, and to assess the choice of PID gains during actual transient operation. These gains were selected using a nominal operating point, to ensure stability of the loop at that point. This was done in the companion design https://www.systemvision.com/design/laser-temperature-regulator-tdfs. But because many of the components in this loop are non-linear in nature (e.g. the TEC, thermistor, even the op-amp with rail voltage limiting), it is good practice to use simulation to verify performance during large-signal transients.

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Copy of Laser Temperature Regulator TDFS - on Tue, 08/25/2020 - 13:39

david.g.bedrosian+rohm_test_designs_production
Designer234163

david.g.bedrosian+rohm_test_designs_production

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Copy of Laser Temperature Regulator using Peltier TEC - on Tue, 06/30/2020 - 11:49

alanlee
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Description

This example shows the ability of a Peltier Module, or Thermo-Electric Cooler (TEC), to actively transfer heat away from a "laser" or other electronic device, during fast-changing power dissipation conditions. A thermistor, with resistance that is sensitive to temperature, is used in a Wheatstone Bridge configuration. It produces a differential voltage that is amplified by an op-amp circuit. The op-amp output voltage is approximately proportional to temperature, and 180 degrees out of phase.

The rest of the control loop is modeled here using ideal mathematical control blocks. This abstraction allows the designer to focus on the overall performance of the regulator, and to assess the choice of PID gains during actual transient operation. These gains were selected using a nominal operating point, to ensure stability of the loop at that point. This was done in the companion design https://www.systemvision.com/design/laser-temperature-regulator-tdfs. But because many of the components in this loop are non-linear in nature (e.g. the TEC, thermistor, even the op-amp with rail voltage limiting), it is good practice to use simulation to verify performance during large-signal transients.

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Copy of Laser Temperature Regulator TDFS - on Sun, 04/12/2020 - 20:55

ik
Designer6926

ik

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ePower_970

ebookaktiv
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Copy of Laser Temperature Regulator using Peltier TEC - on Mon, 01/20/2020 - 20:44

DGB
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DGB

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Description

This example shows the ability of a Peltier Module, or Thermo-Electric Cooler (TEC), to actively transfer heat away from a "laser" or other electronic device, during fast-changing power dissipation conditions. A thermistor, with resistance that is sensitive to temperature, is used in a Wheatstone Bridge configuration. It produces a differential voltage that is amplified by an op-amp circuit. The op-amp output voltage is approximately proportional to temperature, and 180 degrees out of phase.The rest of the control loop is modeled here using ideal mathematical control blocks. This abstraction allows the designer to focus on the overall performance of the regulator, and to assess the choice of PID gains during actual transient operation. These gains were selected using a nominal operating point, to ensure stability of the loop at that point. This was done in the companion design https://www.systemvision.com/design/laser-temperature-regulator-tdfs. But because many of the components in this loop are non-linear in nature (e.g. the TEC, thermistor, even the op-amp with rail voltage limiting), it is good practice to use simulation to verify performance during large-signal transients.

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Laser Temperature Regulator using Peltier TEC and Vishay Thermistor

Mike Donnelly
Designer19

Mike Donnelly

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11 years

1,697

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Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

Description

This "Live Application" example shows the ability of a Peltier Module, or Thermo-Electric Cooler (TEC), to actively transfer heat away from a "laser" or other electronic device, during fast-changing power dissipation conditions. A Vishay thermistor from our Partner Library, with resistance that is sensitive to temperature, is used in a Wheatstone Bridge configuration. It produces a differential voltage that is amplified by an op-amp circuit. The op-amp output voltage is approximately proportional to temperature.The rest of the control loop is modeled here using ideal mathematical control blocks. This abstraction allows the designer to focus on the overall performance of the regulator, and to assess the choice of PID gains during actual transient operation.All of the parameters in blue can be changed by the user and a new simulation run. The updated scope waveform results will show the effect of that change. You can change the electrical resistance of the "laser", which is just a simple resistance heating element for this example, to change the power dissipation level. You can also change the heat transfer resistance values in the thermal network, to see their effect on system performance. Finally, you can change the PID control block gains and see the effect on the steady-state and transient behavior of this temperature regulation system.Note: You can move the waveform probes to see any other signal in the system.

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Laser Temperature Regulator using Peltier TEC with Vishay TFPT temperature sensor

alain stas
Designer208121

alain stas

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5 years 11 months

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Laser Temperature Regulator using Peltier TEC with Vishay PTS temperature sensor

alain stas
Designer208121

alain stas

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Laser Temperature Regulator using Peltier TEC

Mike Donnelly
Designer19

Mike Donnelly

Member for

11 years

1,697

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Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

Description

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david.g.bedrosian+rohm_test_designs_production
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