双绕组发电机串并联换接整流拓扑设计
闵辉辉，张云*，郭永武，庄健，栾名辰
山东交通学院轨道交通学院，山东 济南 250357
摘要：为解决车辆发动机在不同工况下转速范围较大，导致取力发电机的电压范围较大的问题，设计双绕组发电机绕组结构及双绕组串、并联切换电路，并进行仿真验证，结果表明串、并联理想输出电压均满足设计要求。设计晶闸管整体设计方案、自然换相点检测电路和脉冲变压器驱动电路，制作样机并进行实验室和现场测试。发电机低速运行时，输出电压较低，采用串联整流输出的方式提高输出电压；发电机高速运行时，采用并联整流输出的方式，降低整流输出电压，整流后的电压满足后级逆变器所需输入电压范围。实验室测试结果表明：设计系统能实现双绕组的串、并联换接输出，未出现电压和电流间断输出情况，满足设计的基本目标。现场测试结果表明：在不同转速、不同负载等工况下，设计的双绕组切换控制系统能实现电压的串、并联切换，满足大功率40 kW工况运行，符合预期设计要求。
关键词：取力发电机；双绕组发电机；串、并联换接；晶闸管控制
Design of series-parallel switched rectifier topology for dual-wound generator
MIN Huihui, ZHANG Yun*, GUO Yongwu, ZHUANG Jian, LUAN Mingchen
School of Rail Transportation, Shandong Jiaotong University, Jinan 250357, China
Abstract: To address the issue of large voltage fluctuations in the power take-off generator due to the wide speed range of the vehicle engine under different operating conditions, a dual-wound generator winding structure and dual-wound series-parallel switching circuit are designed and simulated for verification. The results indicate that both series and parallel ideal output voltages meet the design requirements. A design plan is created for the thyristor assembly, natural commutation point detection circuit, and pulse transformer drive circuit. Prototypes are manufactured and tested in both laboratory and field settings. When the generator operates at low speeds, the voltage is low, so serial rectification is utilized to increase the output voltage. At higher speeds, parallel rectification is employed to decrease the output voltage, ensuring that the rectified voltage meets the input voltage range required by the subsequent inverter. Laboratory tests demonstrate that the designed system achieves dual-wound series-parallel switching with no interruptions in voltage or current, meeting the basic design goals. Field tests show that the dual-wound switching control system performs voltage series-parallel switching under various conditions, meeting the expected requirements for operation under high-power 40 kW conditions.
Keywords: power take-off generator; dual-wound generator; series-parallel switching; thyristor control
