【作者】 薛晓晶；

【导师】 李勇；

【作者基本信息】 哈尔滨工业大学 ， 电机与电器， 2008， 硕士

【摘要】 永磁发电机的电磁转矩是制动转矩。本文中以永磁发电机作为动作器,利用其制动作用稳定水流中的管状仪器系统。针对该发电机特定的工作背景,本文从发电机的本体和系统的控制两个方面进行了研究。在动作器的本体设计中,针对其特殊的工作环境,分析了系统的工作原理,给出了发电机的总体设计方案,介绍了发电机结构的设计特点。分析了发电机中几个重要参数对反电势系数及电磁转矩的影响,并且用理论分析和有限元计算结合的方法对它们进行了优化选择。利用有限元软件ANSOFT对电机进行了分析计算,包括电机的空载磁场、相电感以及一定条件下的电磁转矩等。分析了电机铜耗和定子铁心损耗,在此基础上利用ANSYS分析了电机定子的温升,验证了所设计的电机在稳态运行时的温升不超过允许值,绕组的绝缘等级满足温升限值。针对管状仪器稳定系统的运行原理,建立了基于Simulink的系统控制模型,仿真分析了在给定量恒定和变化两种情况下,发电机的电磁转矩随水速的变化情况。验证了该控制系统模型可以满足实际需要。设计了满足控制系统要求的硬件电路,并对控制系统进行了模拟实验,并采用实验的方法对发电机进行了参数和性能测试。实验表明所设计的控制系统可行,发电机满足性能要求。更多还原

【Abstract】 The electromagnetism torque of permanent magnet DC generator was brake torque. In this paper, permanent magnet DC generator was used as the actor, using its brake action to balance the pipy device in the stream current. Against the special work background of the generator, the body design and control system were studied in this paper.In the body design of the actuator, against its the special work background, system operating principle was analyzed, the total design program is given, and the generator design feature was also introduced.The influence on EMF and electromagnetism torque of several important factors was analyzed, and they were chosen optimized by the associative method of theoretical analysis and finite-element method. The finite element analysis software ANSOFT was adopted to analyze and calculate the generator. The magnetic field with on-load, phase inductance, and electromagnetism torque under some conditions were analyzed.The copper loss and stator iron loss were analyzed, and on the base, ANSYS was adopted to analyze the stator temperature rise, and it was verified that the temperature rise didn’t exceed the allowed value and the insulation rate was satisfied the temperature rise limit.Against the operating principle of balancing pipy device system, the system control model under Simulink was made. The torque variation with water velocity at different condition was simulated. And the control system model was verified to satisfy the actual demand.Circuit board meeting the demand of control system was designed, the model experiment of control system was operated, and parameters and performance of the generator was tested which verified the feasibility of the control system.更多还原