Boost型转矩控制器的稳定控制技术研究

Research on stability-control technique for Boost torque controller

调制式旋转导向钻井工具通过调节涡轮电机的输出转矩来实现导向控制,斩波式转矩控制器有较大的电流谐波,会产生较大的脉动转矩和较强的电磁干扰,功率因数和转换效率低。针对斩波控制器的不足,提出一种Boost型转矩控制电路。介绍了这种控制器的工作原理,从而建立了控制电路的数学模型。通过分析控制系统的稳定性以及不稳定状态的混沌分岔行为特征,给出混沌控制策略,并详细研究了分别采用参数正弦微扰共振和参数线性斜坡微扰共振方法时电路的控制特征及效果。台架模拟试验表明,选用参数线性斜坡微扰法可保证电路稳定可靠地工作,达到抑制脉动转矩、提高功率因数和转换效率的目的。

The steering control of modulated rotary steering drilling tool can be realized by regulating the output torque of the turbo motor. There were much more current harmonics in the chopping torque controller, which resulted in larger torque ripples and electromagnetic interferes and lowered the power factor and the conversion efficiency. A kind of Boost torque controller was proposed to solve above problems. The working principle of Boost torque controller was introduced, and the mathematical model for the control circuit of controller was built up. The stability of the control system and chaotic characteristics of the unsteady section were analyzed. The chaotic control methods were discussed. The control characteristics and effects in the circuit control while using parameter sinusoidal perturbation resonance and parameter linear ramp perturbation resonance were investigated. The test of simulation tool indicated that the parameter linear ramp perturbation resonance method could make the torque controller being steady and reliable operation, suppress torque ripple and improve the power factor and conversion efficiency.