PDP扫描电极高压驱动电路的研究

介绍了PDP驱动电路的构成,在分析扫描电极高压驱动波形和驱动电路设计考虑的基础上,研究了扫描电极高压驱动电路的实现方法,并对能量恢复电路作了一定的介绍。通过电路分析,该驱动电路能够完成各个时期输出相应脉冲的要求,且能量恢复电路能够降低系统功耗。     

一种上变频自供电无线传感器电源管理电路

电线周围的电磁场能量密度低,电磁换能器采集到的能量通常无法直接驱动无线传感器正常工作.论文采用上变频技术,设计了一种自供电电源管理电路来提高能量采集效率.由于电路的输出功率与品质因数成正比,且品质因数的大小与电路谐振电容的根号值成反比,因此通过提高电路的工作频率来减小谐振电容值,可以使高品质因数的电路产生更高的输出功率,进而增加能量采集效率.实验结果表明,该电路的最大能量采集效率是传统桥式整流电路的2.1倍.当电线中通过1A、50Hz的交流电时,电源管理电路最大采集功率为780μW,能量采集效率达到48.75%.当管理电路中超级电容能量积累达到一定程度,电容放电驱动无线传感器工作.     

交流PDP驱动线路中的能量恢复电路

本文针对目前交流ＰＤＰ驱动电路所普遍采用的能量恢复电路,就其工作原理作以简要介绍。该电路可在很大程度上减少ＰＤＰ驱动方式本身所造成的不必要的能量损耗。     

SM-PDP老炼系统设计

针对SM-PDP的实际老炼工艺需求和实测的各项工艺指标,设计了一套专用的老炼电路系统。该系统包括高压驱动电路,保护电路和控制电路。高压驱动电路中采用了能量复得维持驱动技术,大大减少系统的寄生电阻和寄生电容上的能量损耗,保护电路考虑了多种保护方案,可有效地实现对屏和系统的保护,控制电路可方便地实现各种控制调整,并具备良好的工作状态显示。本系统已经在25 inch SM-PDP开发项目中得到应用。     

AC-PDP新型能量恢复电路的研究

在表面放电式AC-PDP驱动原理的基础上，介绍了一种新型的PDP能量恢复驱动电路。该电路利用PDP的等效固有电容和外加电感器产生谐振，以防止突然的充放电。与以前的能量恢复方法相比较，该电路能更有效地恢复由于传统的硬开关和置换电流引起的能量损失，并且结构简单，可进行不对称操作，更适合于实际应用。     

AC-PDP能量恢复驱动电路的研究

根据表面放电AC-PDP的特性及驱动原理,提出了一种两级的能量恢复电路,并对电路工作过程进行了详细的分析。通过3种结构的能量恢复电路效率进行的详细比较,本电路相对于一级能量恢复电路来说效率得到了很大的提高,相对于多级能量恢复电路,电路的高压MOS管减少了25%,其他元件也相应减少,效率提高了15%。并通过实验证明了此电路的可用性及实用性。     

大屏幕SM-PDP能量复得维持驱动电路系统设计

针对新型结构的荫罩式等离子平板显示器 ( SM-PDP)提出了一种有效的能量复得维持驱动电路方案。从理论上详细分析了电路的工作原理 ,并且介绍了相关金属氧化物半导体场效应管 ( MOSFET)的栅极驱动方法。电路系统通过实验证明 ,利用电感与屏寄生电容之间的串联谐振可以大大减小 PDP屏寄生电容的位移电流在电路上损耗的功耗。此能量复得电路已经在 3 4in全彩色 SM-PDP( 640× RGB× 480 )中得以应用     

部分谐振式PDP能量恢复电路的研究

介绍了等离子平板显示器(PDP)的驱动原理,引入了一种新型部分谐振式能量恢复电路,此电路利用谐振原理使扫描驱动IC的工作电压比常规方法有明显降低,能量恢复效果明显,实验证明其可以大大减少PDP能量损耗,提高系统性能,具有广泛的应用前景.     

无线传能充电电路的设计

本设计利用电磁感应原理实现无线传能充电。采用MSP430F2274超低功耗单片机作为无线传能充电的监测控制核心,系统主要由能量发送单元和能量接收单元两部分组成。能量发送单元通过晶体振荡电路,驱动电路和功率放大电路产生高频率的电磁振荡,使发射线圈向接收线圈传递能量。     

UPS电池浮充动态均衡控制研究

蓄电池是UPS系统的核心,若蓄电池的使用得不到正确的使用和维护,UPS就失去了作为备用电源的意义。该文分析了电池过充和深度放电的危害,并设计了电压检测电路和能量均衡电路。电压检测电路实时检测各电池单体的状态,用MCU接收采集电路的电压值。然后,MCU根据得到的信息判断并发出指令驱动均能量均衡电路实现蓄电池组能量和单体电池的能量流动。保证了各电池单体状态的一致性,使之更好的维护电池,提高电池的使用寿命。     

一种新型的AC-PDP能量恢复电路

在简单介绍表面放电型AC-PDP的结构和发光原理的基础上,引出能量恢复电路的思想.介绍常用的能量恢复电路及其工作过程,指出该类电路的弊端.提出一种全新的能量恢复电路,最后给出了其控制波形.     

A novel energy-recovery sustaining driver for plasma display panel

A novel energy-recovery driver is proposed to drive a plasma display panel (PDP) in the sustaining operation. The proposed circuit uses the parallel resonance between the inductor and the intrinsic capacitance of PDP to mainly recover the energy lost by the capacitive displacement current of the PDP. The parasitic resonance caused by the parasitic inductance and the stray capacitance is prevented greatly. A 34-in AC PDP equipped with the proposed driving circuit, operated at 100 kHz, is investigated. In addition, some prior work is shown in this paper for comparison, in which the power consumption of driving the same 34-in panel is measured. The experimental results show that the proposed driver has a low-cost structure and better performance than the prior ones.     

High performance series-resonance energy-recovery circuit for plasma display panel

A new high performance series-resonance energy-recovery circuit (ERC) for a plasma display panel (PDP) is proposed. Two different ERCs are used for both sides of the PDP, and the slow falling and fast rising times are employed. Therefore, it features the zero voltage switching, low electromagnetic interference, low current stress, no severe voltage notch, and high energy-recovery capability.     

A resonant energy-recovery circuit for plasma display panel employing gas-discharge current compensation method

A resonant energy-recovery circuit for a plasma display panel (PDP) employing a gas-discharge current compensation method is proposed. Its main concept is to make the resonant circuit biased by V/sub s/ and 0V instead of V/sub s//2 in charging and discharging the PDP, respectively. This operation helps the PDP to be fully charged and discharged and all main switches turned on under zero-voltage switching. Moreover, since the inductor current can compensate the large gas-discharge current, the current stresses on main power switches can be considerably reduced and all main switches have the turn-on timing margin, which ensures the no voltage drop across the PDP. Therefore, all these features could favorably provide a high energy-recovery capability, more accumulated wall charge, reduced sustaining voltage, and low electromagnetic interference. Therefore, the proposed circuit is expected to be well suited for a hang-on-the-wall PDP TV.     

An improved soft-switching PWM FB DC/DC converter for reducingconduction losses

An improved soft-switching topology of a full-bridge (FB) pulsewidth-modulated (PWM) DC/DC converter is described. The new topology employs an energy-recovery snubber to minimize a circulating current flowing through the transformer and switching devices. By using an energy-recovery snubber instead of adding a tapped inductor and a saturable reactor to reduce RMS current stress, the converter achieves zero-current switching (ZCS) for the right leg due to the minimized circulating current and achieves zero-voltage switching (ZVS) for the left leg due to the reflected output current during the interval of left leg transition. Both analysis and experiments are performed to verify the proposed topology by implementing a 7 kW (120 VDC, 58 A) 30 kHz insulated gate bipolar transistor (IGBT) based experimental circuit     

Current-fed energy-recovery circuit for plasma display panel

A new current-fed energy-recovery circuit for a plasma display panel is proposed. All power switches are turned on with zero-voltage-switching, and its sustaining voltage is greatly reduced with the aid of the discharge current compensation. Furthermore, it features a simpler structure, less mass, lower current stress, and lower electromagnetic interface than prior circuits. It is well suited for wall-hanging colour TVs.     

Energy-recovery circuit for plasma display panel

A new energy-recovery circuit for a plasma display panel (PDP) is proposed. It features a simpler structure, less mass, higher efficiency, and fewer devices. The very stable and uniform light emitted from a PDP proves the high quality of the screen. It is suitable for hang-on-the-wall TVs which have desirable features such as thinness, lightness, high efficiency, and low price     

High performance sustaining driver for plasma display panel employing gas-discharge current compensation method

A new sustaining driver for a plasma display panel (PDP) employing a gas-discharge current compensation method is proposed. It features a high performance, zero-voltage-switching, high efficiency, low EMI and high energy-recovery capability. Furthermore, since it compensates for the large gas-discharge current, it enables the PDP to light at a lower voltage than the prior circuit.     

Zero-voltage and zero-current switching energy-recovery circuit for plasma display panel

A new zero-voltage and zero-current switching (ZVZCS) energy-recovery circuit (ERC) for a plasma display panel (PDP) is proposed. The external current source ensures the zero-voltage turn-on of all MOSFETs, zero-current turn-off of all IGBTs, and fully charged/discharged PDP, which desirably reduce the sustaining voltage. Moreover, it features simpler structure, fewer devices, lower cost, lower electromagnetic interference noise, and lower current stress.