Second , a doubly salient electro - magnetic generator employs two independent channels consisting of two groups three phase windings . the two channels provid power to the same load and output voltage can reach the demand through adjusting the excitation current 文中还在一台电励磁双凸极发电机的定子上设置两套3相电枢绕组,实现双通道发电,通过调节励磁电流大小使两发电通道输出相应的额定电压,并联向负载供电。
Because of its unique structure and outstanding characteristics , multiple - channel brushless dc generator which is made up of doubly salient electro - magnetic generator is a new kind of one . it can improve the reliability of the power - supply system for helicopters 由于电励磁双凸极电机独特的结构和优良的性能,所以由电励磁双凸极电机构成的多余度无刷直流发电机是实现高可靠性直升机电源系统较为理想的一种新型无刷电机。
Research history on srm is accompanied by the development of the electronics and microelectronics technology . switched reluctance motor drive system ( srd ) is a new type of speed regulating system , which is compose of double - salient reluctance motor , power converter , position sensor and controller 开关磁阻电机调速系统是一种新型的变速拖动系统,其调速性能与其他调速系统相比更加优良,它由双凸极的磁阻电机、功率变换器、位置传感器、控制器组成。
The structure and starting / generating integral working principle of dsem is firstly explained in this thesis . starting control mode and generating reason of starter / generator were introduced , and the back electromotive force ( emf ) of starting state and generating state was also analyzed 本文首先阐述了电励磁双凸极电机的结构与起动/发电一体化工作原理,介绍了起动/发电机的起动控制模式和发电机理,对起动/发电机起动状态和发电状态的反电势进行了分析。
Doubly salient electro - magnetic generato ( rdseg ) is a relatively new type of ac brushless machine , which offers an excellent balance between cost , reliability , power density , and high - speed capability . the technology of multiple channels is of help to increase the capability of the aero power - supply system 电励磁双凸极发电机是一种新型的交流无刷电机,它具有结构简单、可靠性高、能量密度大及高速运行等优点。余度技术是提高航空电源系统可靠性的重要手段。
The controller includes two control loops which are outer speed loop ( variable parameter pi adjustment ) and inner current loop ( single - chop current delta - control ) . in order to improve system performances , design of digital control system based on dsp is presented . the proportional parameter and integral parameter can be obtained through the design 整个系统采用变pi参数转速调节(外环)与单斩电流滞环调节(内环)相结合的双闭环控制方式,为了得到既快速又稳定的恒速系统,本文还给出了基于dsp的双凸极永磁电机数字控制系统的设计方案,通过此设计方案可以得到转速环的比例参数kp和积分参数ki的参考值。
However , because of complication of mathematical model of srm & controlling system about srd and serious nonlinearity caused by double - salient structure and prominent disadvantage for the performance of high speed , reliability and cost in application brought by the configuration of sensor of rotor position in previous system , more work is needed to perfect in academic and practical research . so this work is implemented to make research for it 但由于sr电机的双凸极结构造成电机模型及其控制系统的严重非线性，原有转子位置传感器的存在也影响了电机控制系统的高速运行性能、造成可靠性不高和成本增加等较为突出的问题，使得srd无论是在理论上还是在应用上都存在不少问题，有待于进一步的研究和完善。
Doubly salient motor is a new kind of motor . more and more attention and research efforts are given to this new motor recently because of its particular structure and high electrical performance . this paper is devoted to a novel brushless dc starter / generator system , which use doubly salient motor as its starter / generator 双凸极电机是一种新型电机，其独特的结构和优良的电气性能正得到越来越多的关注和研究，本文主要对采用这种双凸极电机的新型无刷直流起动发电系统的起动控制进行了研究。
Based on comparison of several motor candidates , doubly salient permanent magnet ( dspm ) motor is a good choice for it ’ s outstanding performance . similar to conventional drive system , dspm brushless dc motor ( dspm - bldcm ) is composed of dspm motor and it ’ s controller . the controller is made up of three - phase full - bridge inverter , driver , dsp control unit and etc . for high power system , every switch of three - phase inverter is actually made up of four mosfets in parallel 在充分考虑国内外不同的液压泵电动机的基础上,本文选用了双凸极永磁电机作为整个系统的电机本体,并配以电动机控制器(控制器包括三相桥式功率变换器、驱动电路、 dsp主控单元、电流采样及预处理和位置采样及预处理等主要部分)组成整个液压泵电动机系统。
As a new kind of motor , switched reluctance motor ( srm ) has a doubly salient structure , and its windings are only mounted on the stators . these characteristics bring srm lots of virtues : solid structure , high reliability and efficiency , good fault - tolerance , low cost etc . switched reluctance driver ( srd ) combined srm with modern power electronic technology and control technology 开关磁阻电机( srm )作为调速电动机的新品种,采用定、转子双凸极铁心结构,并且只在定子上装有集中绕组,转子上无绕组或永磁体,具有结构简单坚固、运行可靠、效率高、功率变换简单、容错性好和成本低等优点。
