| 1. | Novel zvzct soft - switching cell in pwm dc - dc converter
直流变流器中一种新型的零电压零电流转换软开关单元 |
| 2. | The dynamic breaking - course studying adapt to zero - current - break control
适应零电流分断控制的动态分断过程研究 |
| 3. | Zero - amp frequency
零电流转速 |
| 4. | Mathematical model for halfbridge zcs quasiresonant co2 laser switching power supply
半桥零电流准谐振co2激光器开关电源数学模型的构建 |
| 5. | The design of rcd snubber and voltage feedback loop is introduced . finally , a 1kw prototype is researched and developed successfully to verify the operation principle of the combined converter
该变换器中的开关管实现了在零电压下关断，而且其中两个开关管在零电流零电压下开通。 |
| 6. | The microprocessor is used to realize digital control as flip plus of the scr . the ic chip sa866ae of mitel company is utilized as the low frequency signal generator of the system . furthermore in the zero - current detection circuit , use the photocoupler gaalas ired and photo ic to detect zero - current , furthest shorten the commutating " died region " , prevent the current from distorting
设计中采用单片机控制可控硅的触发脉冲，实现数字化控制，并利用mitel公司的三相pwm交流电机脉宽调制芯片sa866ae ，成功研制了交-交频器中的低频信号发生器装置，效果良好；此外利用用光电检测元件进行系统零电流的检测，尽可能地缩短换相死区，防止电流发生畸变，成功地解决了原有低频电源系统中存在的两大难题。 |
| 7. | A novel resonant pole zvt three - phase pwm inverter circuit for three - phase ac motor driving is presented . the proposed circuit has the feature of being more flexible with three inverter arms in zvt process . using only one resonant inductance , the inverter can not only reduce the power loss of inductance but also avoid possibility of unbalance in motor ' s three stator windings
提出了一种针对三相交流电机驱动的新型谐振极零电压过渡三相pwm逆变器电路，该电路中三个逆变桥臂的零电压过渡更具有灵活性，仅使用一个谐振电感，既减少了电感损耗又防止了电机三相定子绕组可能存在的不平衡问题，并且谐振电感中残余能量能够回馈给电源；新型逆变器的辅助开关均工作在零电流开关条件下，并且控制逻辑简单。 |
| 8. | The principle and application of zero current switching boost pfc circuit are given . by introducing the development of ac / dc module with pfc the key techniques of the module are stressed on the engineering design . some problems are resolved such as the module is so small that spread the hot difficulty
从理论上分析和研究了零电流开关升压式pfc电路的原理和应用，并结合250w带pfc电路ac dc模块的研制，从工程设计角度重点阐述了该模块的关键技术，解决了模块体积小、散热困难及工艺等方面的难题。 |
| 9. | That is why more and more people pay more attention to it . the technology applied in resonant dc link inverter ( rdcli ) is one of soft switching technologies . it makes the current or voltage in dc bus return zero periodically ; through resonant technology in the circumstance of switching change
作为软开关技术的一种应用? ?谐振直流环节逆变器,在直流环节利用谐振技术使母线电压或电流周期性地回零,为开关在换流时刻提供零电流或零电压条件,从而达到降低开关损耗的目的。 |
| 10. | The criteria used for adaptive feedforward compensation is introduced , two unbalance compensation ways of permanent magnet biased magnetic bearing based on bearing current minimization are studied , the recursive adaptive algorithm and the unbalance compensation on estimation of synchronous rotate speed are studied , the simulation results are given
在基于零电流补偿原则的基础上,提出基于递归运算的不平衡补偿方案,进行了理论分析和仿真研究;对基于同步转速估算的不平衡补偿方法进行了详细的理论分析,并进行了仿真研究。 |
