Duty ratio separate-combine type isolation driving circuit for transformers

• Main Authors: XIN ZHANGNAN, HONG FENG
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2013
• 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 discloses a duty ratio separate-combine type isolation driving circuit for transformers, which comprises a duty ratio separation circuit 1, a totem-pole circuit 2, a transformer isolation circuit 3 and a duty ratio combining circuit 4. Through the adoption of the technology in which duty ratios are separated and then combined, the magnetic recovery of the drive transformers can be ensured so as to prevent saturation. The isolation driving circuit has the advantages that no extra device or circuit is required for magnetic saturation of the drive transformers; the driving waveform is more accurate and more stable; the topology of the circuit is simple; the number of active power devices is small; the size is small; the consumption is less; the realization is easy; the devices of the circuit are simple; the cost is low; the stability is good.