Automatic voltage limiting power switch device tandem high voltage circuit

• Main Authors: WANG DAKAI, HUANG DIANXUN
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2014
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The utility model relates to an automatic voltage limiting power switch device tandem high voltage circuit which comprises a power switch device tandem branch, a number of energy storage circuits P1 to Pm, a number of discharge diodes Dp, a number of junction diodes, an energy concentration diode and a concentration voltage limiting circuit. Through the concentration voltage limiting circuit with low voltage, the voltage of each energy storage capacitor is limited, and safety voltage limiting is carried out on each power switch device. According to the utility model, the problem that the tandem use of the power switch devices with the withstand voltage of 3300V or above is limited due to low withstand voltage of small package clamp diodes of TO220, TO247 and the like in the prior art is overcome; the reverse breakdown voltage of the clamp diodes can be reduced by several times; the reverse recovery current is decreased; the clamp diodes work in a safe work area; and the system reliability is greatly improved.