Automatic voltage limiting power switching device series high-voltage circuit

• Main Authors: WANG DAKAI, HUANG DIANXUN
• Format: Patent
• Language: Chinese; English
• Published: 18.09.2013
• 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 invention relates to an automatic voltage limiting power switching device series high-voltage circuit which comprises a power switching device series branch circuit, a plurality of energy-storage circuits P1 to Pm, a plurality of discharge diodes Dp, a plurality of bus diodes, an energy concentration diode and a concentration voltage limiting circuit. Voltage of energy-storage capacitors is limited through the low-voltage concentration voltage limiting circuit, so that voltage of each power switching device is safely limited. The automatic voltage limiting power switching device series high-voltage circuit overcomes the shortcoming that series use of power switching devices with 3300V or a higher voltage-withstanding value is limited as voltage-withstanding values of small packaged clamping diodes such as a common TO220 clamping diode and a common TO247 clamping diode are low in the prior art, the reverse blocking voltage of the clamping diodes of the series high-voltage circuit can be decreased by multip