Several issues on the designment of pulse electrical stress aging test device of insulation materials

In order to meet the requirements of the lifespan test of insulating materials under pulsed electrical stress circumstances,a high-voltage high-frequency pulse power supply device of cascaded H-bridge with optical isolation was developed. After studying the pulse parameters with specimen, we should consider the pulse rise time in load condition but not overemphasize the pulse rise time in no-load condition when designing the experimental device. The methods to estimate pulse rise time of multi-mode cascaded H-bridge and pulse power capacity were proposed through analyzing. The experimental result shows that the method which uses to estimate the pulse rise time and power capacity is correct, and technical solutions proposed meets the needs of the accelerated aging test of insulating material under pulsed electrical stress circumstances insulation pulse electrical stress need.