Monday, 21 May 2012

Compact TEC Controllers for Peltier Elements

Compact TEC Controllers for Peltier Elements Compact TEC Controllers for Peltier Elements

(Rubigen / May 2012) Meerstetter Engineering introd uces newly developed TEC-1089 and TEC- 1122 full digital TEC controllers for high-precision OEM temperature control applications. Their 'no-compromise' design is built from ground up arou nd four core elements: low ripple power supply, high precision temperature detection, intel ligent MCU control and comprehensive interfacing/safety features.

These compact temperature controllers feature true bipolar ± 10 A / ± 19 V output per device/channel, which can be paired to yield up to ± 20 A at low ripple. Because of highly efficient arc hitecture, components and control signals, device cooling over the base plate is sufficient even for permanent operation at full load.

Object (primary) temperature is acquired with NTC or Pt100 probes in 2- or 4-wire configuration with 0.001°C resolution. Auxiliary temperature input(s) allow monitoring the heat sink temperature, which information is internally used to optimize cooling/ heating power in real time. Sensor characteristics are linearized using third order polynomials, and analo g temperature input circuitry is factory-calibrated to ensure maximum repeatability and precision. Long-te rm stability well better than 0.01°C has been demonstrated under various operating conditions.

The devices are driven by a powerful MCU (with FPU) and extremely versatile firmware, taking care of sensor data conditioning, PID control, nominal valu e ramping, Peltier element modeling, system diagnosis, etc. All configuration and safety settin gs can be read and written by USB or RS485. Some features of the TEC-1089 and TEC-1122 are read ily customizable: Reverse polarity protection, temperature measurement ranges and hardware, digita l lines for control, diagnosis and communication protocols, etc. Finally, a convenient PC-software and a comprehensive user manual are shipped with the controllers, allowing for stra ightforward configuration, commissioning and system integration of these affordable high-performance OE M TEC controllers.

Meerstetter Engineering is a family-owned electronics engineering company, developing and manufacturing power electronics, high-voltage techn ology and embedded systems. With laser-electronics as its specialty, Meerstetter Engineering also consults clients. e.g. to help them finding a custom laser solution.