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通过电路分析对电子镇流器存在的电源电流谐波高和功率因数低等问题。提出几种能够降低谐波含量和提高功率因数的方法，并给出理论分析。
Through the circuit analysis of the electronic ballast existing supply current harmonic high power factor and low problems. Several methods are proposed to reduce the harmonic content and improve the power factor, and the theoretical analysis is given.