一种新型高功率因数电磁发射机

A New Type of High Power Factor Electromagnetic Transmitter

针对目前地面电磁探测发射机存在的拓扑结构复杂、重量大、功率密度小、输出功率因数低的问题,提出了一种新型高功率因数电磁发射机拓扑结构。首先建立了PWM整流器的数学模型,提出了基于前馈解耦的电压电流双闭环控制策略。采用滑模观测器的方法实现了对发电机转子位置的观测,并通过PLL方法提取得到准确的转子位置角信息。最后,仿真和实验结果表明,滑模观测器的方法可以准确得到发电机的转子位置,该拓扑结构可以实现发射机高功率因数运行。

Aiming at the problem that the existing ground electromagnetic detection transmitter has complex topological structure,large weight,low power density and low output power factor,a new high power factor electromagnetic transmitter topology is proposed.Firstly,the mathematical model of PWM rectifier is established,and the voltage-current double closed-loop control strategy based on feedforward decoupling is proposed.The sliding mode observer is used to observe the rotor position of the generator,and the accurate rotor position angle information is obtained by the PLL method.Finally,the simulation and experimental results show that the sliding mode observer method can accurately obtain the rotor position of the generator,and the topology can realize the high power factor operation of the transmitter.