Design of sampling resistor of high power constant-current source

According to the function and technical requirements of the sampling resistor in high power constant-current source, the design principle, structure and choice criterion of the material of the resistor were systematically summarized based on theoretical analysis and experimental study.The water-cooling and self-cooling sampling resistors of high power constant-current source were compared. The experimental results show that, compared with water-cooling sampling resistor, the self-cooling sampling resistor improves the stability of the constant-current source three times, reduces the ripple coefficient from 2.7% to 2.3%, and increases the life time more than 10 times.