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在分析煤矿提升机转动Doherty放大器工作原理后,从改变煤矿提升机的漏极电压和减小输出端阻抗入手,进一步提高煤矿提升机功率放大器的工作效率;通过改变栅极电压,利用对消手段来改善放大电路的三阶交调。ADS仿真电路表明,改进后的煤矿提升机电路比传统Doherty电路在工作效率上提高10%,三阶交调改善了5 dB,有利于煤矿提升机转动的应用。
After analyzing the working principle of Doherty amplifier in coal mine hoisting machine, starting from changing the drain voltage of coal mine hoist and reducing the output impedance, the working efficiency of power amplifier in mine hoist is further improved. By changing the gate voltage, To improve the amplifier circuit of the third-order intermodulation. The ADS simulation circuit shows that the improved mine hoist circuit improves the working efficiency by 10% and the third-order intercept improves by 5 dB compared with the traditional Doherty circuit, which is beneficial to the application of coal mine hoist.