Constant stator magnetic linkage control frequency converter includes power devices utilizing igbt , drive circuit using three - phase drive ic with multiple protection functions . pwm signal formation circuit in the way of voltage space vector control and realized with pld ( programmable logic device ) devices and compensation for the influence of supply voltage variation and stator resistance voltage drop 其中，恒定子磁链控制变频器的设计中主电路采用功率器件igbt ；驱动电路采用三相多功能集成驱动芯片； pwm脉宽调制信号产生电路采用电压空间矢量控制方式，由pld器件实现；对电源电压变化及电阻压降造成的影响进行了补偿。
Due to the direct torque control requires very high performance of real - time , the popular microcomputer core dsp is used as controller in the design of hardware . its high speed of running is suitable to the experiment . in the main circuit , there is a highly integrated power element : ipm as inverter , which includes seven igbt , has high switch frequency and fault diagnosis function 在本控制系统的具体实现上，由于直接转矩控制对实时性要求很高，因此在硬件方面，本课题采用了目前比较流行的数字信号处理器( dsp )作为本实验的控制器，其处理速度高的特点正好符合本实验的需要；在主电路中，本系统使用了集成度高的功率器件：智能功率模块( ipm ) ，作为逆变环节，其集成了七个igbt ，实现了高开关频率逆变以及故障诊断的功能，从而使控制系统的体积大大缩小、控制更加灵活。
Aiming at the feature of cm interference in power converters , a new approach ? intrinsic dynamic nodes potential balance is proposed . by building node pair with balance potential and making use of the intrinsic stray capacitor of power semiconductor devices , the cm current can be suppressed effectively 在对共模干扰建模的基础上，提出了内在动态节点电位平衡的思想，其思路是通过在电路内部构造动态电位平衡节点对，并利用电路中功率器件固有的对地分布电容使得电路中的共模干扰电流互相抵消，从而抑制功率变换器的共模emi 。
Experimental results show , with the not - uniform two - direction ballasting technology , the peak junction - temperature at the center of the chip can be lessened 7 - 10 surface temperature of the case can also reduce 3 - 7 , and the heat - dissipating property of the power devices has distinct improvement 实验结果表明：具有非均匀双向镇流电阻结构的双极功率器件，其芯片中心峰值结温ih了村技人学博士论文可降低7 10ac ，谷壳表面的温度也可降低3 7c ，器件的敝热特性明显岱岛。
On the basis of operating - characteristic of high - frequency and microwave bipolar power devices , this paper proposes new structures and new materials which helps to improve devices " property , detaily analyzes their distinguishing feature and function , completes corresponding experiments , and obtains important theoretical and experimental data 本文在分析双极高频、微波功率器件的工作特点的基础上，提出了有利于提高器件性能的新结构和新材料，详细分析了其特点和功能，完成了相关的实验工作，取得了重要的理论数据和实验数据。
High frequency switching technique is becoming more popular in the power electronics area , the high frequency power transistors are applied in the buck - boost type chopper system . the characteristics of power mosfet and insulated gate bipolar transistors ( igbt ) , some new kinds of power swithing devices , are deeply studied 高频开关技术是当今电力电子技术发展的方向，本文研究的buck - boost斩波系统中采用了高频功率器件，所以本文对新型开关器件? ?功率mos场效应管[ mosfet ]和绝缘门极晶体管[ igbt ]的特性进行了初步研究。
Whether military products or civilian products , traditional methods all depend on increasing redundancy , apparently , there is a limit to these measures ; but , compared with the traditional method , the idea of this paper is an new technique , it is an method of predication and estimation , it can eliminate the malfunctions from the power unit before they will happen , it can make the power unit working continuously , steadily and reliably 无论对于军品，还是民品来说，传统的解决方法均是依靠增加冗余度来实现的，如：过热、过压和过流保护等，显然，这种可靠性保护是有一定上限的；但是，本解决方案相对于传统方法来讲，是一种全新的理念，它通过预测估计的方法，将功率器件的不可靠性消灭在萌芽状态，或在故障还未发生之前就将其消除，从而使功率器件连续、稳定并可靠地运行。
Based on the analysis and comparison of the peak current - injection mode and average current mode control strategies , the method of designing average current control mode pi regulator is obtained . the digital simulation of the converter has been done with the help of matlab software . the good transient and stable character of the converter is attained while rated load 在分析与比较峰值电流模式与平均值电流模式控制策略的基础上，给出平均值电流模式pi调节器的设计方法，利用matlab软件对变换器进行了数字仿真，证实了变换器在额定功率范围内动、静态特性良好；过载情况下变换器具有自动限流、保护主功率器件的特性。
