UPS power supply system consists of four parts: rectification, energy storage, conversion and switching control. The voltage stabilization function of the system is usually accomplished by a rectifier. The rectifier adopts a thyristor or a high frequency switching rectifier. It has the function of controlling the output amplitude according to the change of the external power, so that the output amplitude of the rectifier voltage is basically unchanged when the external power changes.
Application of Power Sensor in UPS System:
Hall current sensor 1 sends out signals and gives feedback to control the trigger angle of thyristor, current sensor 2 sends out signals to control the inverter, and sensor 3 controls the floating charge source. Hall current sensor is used to control the power supply to ensure the normal operation. Because of its fast response, it is especially suitable for uninterruptible power supply in computer.
Closed-loop current sensor is based on Hall effect and zero magnetic field balance principle (feedback system) to measure current. The internal magnetic field of the sensor is always controlled at the zero point. The current used to balance the zero magnetic field is the primary current flowing through the conductor multiplied by the proportion coefficient of the primary coil.
Closed-loop current is the output of the sensor. It reflects the change of primary current according to the number of secondary coil turns attenuated at any time. Current output can be converted to voltage output through external resistance.
