• Sachin J M
• Dr. Anitha G S
• Dr. Ravichandran C
• Prasanna Kumar R
• Bhoopendra Kumar Singh

Cooler drives are widely used for cryocoolers, a cryocooler is a refrigerator designed to reach cryogenic temperatures and its main purpose is to cool objects quickly using extremely low temperatures. The main objective is to capture the image from the Space and fed to the FPGA and the signal received is converted to Digital form using Analog to Digital converter (ADC). The proposed inverter drives the cooler drive with 12V/6.5A, 50Hz AC output power via a PID control loop with input voltage range from 24V to 42.5V DC to control the cooling of detector array based upon the temperature signal feedback from the temperature sensor mounted on detector Focal Plane Array. Efficiency of more than 90% is achieved for different range of input DC Voltage and in order to increase the relative accuracy of the thermal sensor, it is supplied with 1mA, 25uA constant current source to bias a temperature sensing diode and is connected to cooler PID control loop for temperature regulation. The voltage measured across the sensing diode is used by the control algorithm in the inverter to regulate the AC output voltage so that the cooler will maintain a stable cold tip temperature.

ATmegaS128 Microcontroller, H-Bridge Inverter, 2N2222A Transistor, ADC, Sine PWM, PID Controller.

"Design and Implementation of Digitally Controlled Cooler Drive Inverter for Temperature Control", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 6, page no.e549-e561, June-2022, Available :http://www.jetir.org/papers/JETIR2206464.pdf

"Design and Implementation of Digitally Controlled Cooler Drive Inverter for Temperature Control", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 6, page no. ppe549-e561, June-2022, Available at : http://www.jetir.org/papers/JETIR2206464.pdf