Design and Test of High Voltage Isolation Transmitter Based on Flat Transformer

According to the requirements of rail transit traction power supply and DC measurement, in view of the characteristics of frequent changes of the electric parameters of the DC traction system, adopting the pulse width modulation (PWM) method controlled by microcontroller unit (MCU) and making use of the printed circuit board (PCB) embedded with magnetic coupling transformer technology, isolated transmitter suitable for the detection of DC high voltage is developed, which could withstand up to 3 600 V AC/DC voltage and AC 20 kV transient voltage. It is applicable for detecting up to 3 600 V AC/DC high voltage system. The isolation transmitter has passed the performance and electromagnetic compatibility test of the National Electrical Testing Center, and its indicators have reached or exceeded similar foreign products.