一、缓冲电路 缓冲电路(Snubber Circuit)又称吸收电路,它是电力电子器件的一种重要的保护电路,不仅用于半控型器件的保护,而且在全控型器件(如GTR、GTO、功率MOSFET和IGBT等)的应用技术中,起着更重要的作用。 缓冲电路的功能有抑制和吸收两个方面,因此下图(a)是这种电路的基本结构,串联的LS用于抑制di/dt的过量,...
This article presents some design guidelines for the RCD snubber of flyback converters. When the MOSFET turns off,a high-voltage spike occurs on the drain pin because of a res-onance between the leakage inductor (L lk ) of the main trans-former and the output capacitor (C OSS ) of the...
1.In chapter two, the main circuit and control circuit of DC part are designed, and the design of RCD snubber circuit, the parameter of LC filter, the selection of magnetic material, and the SMPS is detailedly introduced; In chapter three, the main circuit and control circuit of AC part ...
The bridge drive and RCD snubber circuit disclosed by the utility model has the advantages that action path of a switch tube can be changed, so as to control various transient over-voltage, reduce consumption of component switch and protect safe operation of the control system....
2. A resistor in-series with the clamp diode is suggested to suppress the ringing in R2CD snubber circuit. 3. A TVS snubber is fit for those applications which need very low standby power. But in these cases, the clamp diode should use the ultra-fast diode to avoid significant efficiency...
3、ost converter; power switch tube; rcd snubber circuitrcd箝位电路具有结构简单、体积小、成本低、无需驱动等优点,因而被广泛应用于中小型功率开关电源中。在boost电路中,开关管关断瞬间,电路中感性元件储存的电能释放会产生很大的尖峰电压,使得开关管承受很大的电压应力,甚至可能导致开关管损坏。为了消除开关关断瞬...
(Snubber Circuit) 充放电型RCD缓冲电路,适用于中等容量的场合 图1-40示出另两种,其中RC缓冲电路主要用于小容量器件,而放电阻止型RCD缓冲电路用于中或大容量器件 图1-40 另外两种常用的缓冲电路 a) RC吸收电路 b) 放电阻止型RCD吸收电路 1.7.3 缓冲电路(Snubber Circuit) 缓冲电路中的元件选取及其他注意事项: ...
RCDsnubbercircuitabsorbsthecurrentintheleakage inductorbyturningonthesnubberdiode(D sn )whenV ds exceedsV in +nV o .Itisassumedthatthesnubbercapacitance islargeenoughthatitsvoltagedoesnotchangeduringone switchingperiod. WhentheMOSFETturnsoffandV
Keywords:Boost converter;power switch tube;RCD snubber circuit RCD箝位电路具有结构简单、体积小、成本低、无需驱动等优点,因而被广泛应用于中小型功率开关电源中。在Boost电路中,开关管关断瞬间,电路中感性元件储存的电能释放会产生很大的尖峰电压,使得开关管承受很大的电压应力,甚至可能导致开关管损坏。为了消除开关...
anditdescribestheworkingprincipleofthepowerswitchRCDsnubbercircuit.Theparametersofthecircuitisdesigned.Thecorrectnessofthedesignmethodisverified,anditcanbeusedinmiddleandlowpowerswitchingpowersupplies.Keywords:Boostconverter;powerswitchtube;RCDsnubbercircuitRCD箝位电路具有结构简单、体积小、成本低、无需驱动等优点,...