The controller can ensure reliable cool start , at the same time meet the rapid activation of the warm start . 3 、 the realization theory of the boost power factor correction that uses quasi - length models , uncertain frequency , and peak current - controlled devices , is derived theoretically 根据金卤灯击穿电压?时间的关系,提出了一种采用脉冲变压器的快速启动方式,既能保证冷灯可靠启动,同时又满足了热灯快速启动的要求。
During the circuit design , the author analyzed the basic principle of the direct current motor , pwm control , h - bridge power driver , and two control techniques of h - bridge power drive circuit , designed its general structure , so the feasibility of the design is confirmed . then , reference , oscillator , power dmos gate drive circuit ( charge pump , bootstrap ) , and dead time generation circuit are designed and analyzed in the sub - circuits . a current - controlled oscillator is presented in this thesis 在电路设计中,作者介绍了直流电机的工作原理和数学模型、脉宽调制( pwm )控制原理、 h桥电路基本原理和h桥功率驱动电路的两种控制模式,设计了驱动电路的总体结构,给出了电路的功能模块,确定了设计的可行性,然后在子电路模块中,重点分析设计了基准源电路、振荡器电路、高端功率管栅驱动电路(电荷泵及自举电路) 、低端功率管栅驱动电路和死区时间产生电路。
Simulation comparisons verify the superior performance of the tri - state pwm technology . experimental results indicate that the current - controlled tri - state pwm switching power amplifier based on sample - hold strategy has high frequency bandwidth and fast dynamic response in a wide load range , which can well meet the demands of high - speed magnetic bearing 仿真结果验证了电流三态调制技术的优越性能;实验表明本文研制的基于采样-保持策略电流三态调制开关功放具有结构简单、效率高、纹波小、电流动态响应快、频带宽、受负载影响小等优点,能很好地满足高速磁轴承的要求。
This paper analyses influence of inductance and capacitance to system , resonance of filter and output characteristic of inverter . after analyse the characteristic of inverter parallel system , form parallel system by current - controlled two state modulation inverters , and realize current sharing by pll and current - sharing circuit 分析了滤波电感和电容对系统的影响,并对输出滤波器的谐振现象和逆变器的外特性进行了深入的研究,证明了该调制技术抑制谐振的优点,指出了影响逆变器外特性的主要因素。
To transform a voltage - control problem to a current - control problem , a current - controlled voltage - source inverter ( cc - vsl ) is considered , and a power flow controller based on ph control algoritltnm is designed to improve dynamics of control system and implement closed - loop control to active and reactive power . to promote adaptation and robust , a self - tuned p1 power controller based on fuzzy rule is presented 论文还探讨了采用电流跟踪控制pwm电压型逆变器实现sssc的问题,将注入串联电压控制问题转换为逆变器的电流控制问题,以此建立了sssc控制系统的结构,并设计了基于pi控制算法的sssc的潮流控制器,仿真表明其改善了系统动态特性,实现了对p和q的闭环控制。