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| 摘要: |
| 分析了常规单周期控制的单相功率因数校正器的工作原理,提出了一种改良方案,该方案在控制回路中仅增加了一个电阻补偿网络和一个加法器,在主电路中将电感改为带中心抽头的三点式电感,其他基本参数和常规单周期控制电路相同,消除了由于电感电流纹波造成的畸变,在一定程度上减小了由于电流断续模式(DCM)引入的畸变,解决了由于二极管的反向恢复而引入的电流冲击和尖刺纹波问题,并提高了功率因数校正主电路的可靠性。最后,给出了改良后的功率因数校正器的仿真与试验结果,试验结果表明,改良后的单周期控制的单相功率因数校正器结构简单实用、可靠性高。 |
| 关键词: 单周期控制,功率因数校正,谐波畸变率,校正器 |
| DOI： |
| 分类号:TM761 |
| 基金项目: |
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| Improved single-phase power factor corrector |
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ZHANG Hou-sheng
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| Abstract: |
| The principle of conventional single-phase PFC(Power Factor Corrector) with one cycle control is analyzed and an improved scheme is proposed,which only adds a resistance compensating network and an adder in the control circuit,and changes the main circuit inductance into a center-tapped inductance,with other basic parameters unchanged.It eliminates the distortion caused by the inductance current ripple,reduces the distortion introduced by discontinuous current mode to a certain degree,mitigates the current impact and spine ripple introduced by the reverse restoration of diode,and improves the reliability of PFC main circuit.Simulative and experimental results show that the improved corrector is simple and reliable. |
| Key words: one cycle control,power factor correction,total harmonic distortion,corrector |
