Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-04-07 Hits: Popular:AG11 battery
A brief analysis of the current status of IGBT drive technology
The design of high-power device drive circuits in switching power supplies has always been one of the key technologies in the power supply field. Ordinary high-power transistors and insulated gate power devices (including VMOS field effect transistors and IGBT insulated gate bipolar high power transistors, etc.) have very different specific driving requirements and technologies due to different device structures. The former is a current control device and requires a suitable current waveform to drive; the latter is an electric field control device and requires a certain voltage to drive. This article only introduces the latter situation.
The source and gate of VMOS field effect transistors (and devices such as IGBT insulated gate bipolar high-power transistors) are insulated silicon dioxide structures. DC power cannot pass through, so the low-frequency static driving power is close to zero. However, a gate capacitance Cgs is formed between the gate and the source, so a certain dynamic driving power is required during high-frequency alternate turn-on and turn-off. The Cgs of low-power VMOS tubes is generally within 10-100pF. For high-power insulated gate power devices, since the gate capacitance Cgs is large, ranging from 1-100nF or even larger, larger dynamic driving power is required. Moreover, due to the Miller capacitance Cdg from drain to gate, the gate drive power cannot be ignored.
In order to reliably drive insulated gate devices, there are many mature circuits. When the driving signal and the power device do not need to be isolated, the design of the driving circuit is relatively simple. There are also some excellent driving integrated circuits, such as IR2110. When electrical isolation between the input end and the output end of the driver is required, there are generally two ways: using a photocoupler, or using a pulse transformer to provide electrical isolation.
The advantage of the optocoupler is its small size, but the disadvantages are: A. The response is slow, so it has a large delay time (high-speed optocouplers are generally greater than 500ns); B. The output stage of the optocoupler requires an isolated auxiliary power supply. .
There are three ways to use pulse transformer isolation to drive insulated gate power devices: passive, active and self-contained power drive.
The passive method is to use the output of the transformer secondary to directly drive the insulated gate device. This method is very simple and does not require a separate driving power supply. However, since the gate-source capacitance Cgs of the insulated gate power device is generally large, the gap between the gate and source The waveform Vgs will be significantly deformed, unless the primary input signal is changed to a large signal with a certain power, and the corresponding pulse transformer should also be larger in size.
The transformer in the active method only provides isolated signals, and there is a shaping amplifier circuit on the secondary side to drive the insulated gate power device. Of course, the driving waveform is good, but an additional isolated auxiliary power supply is required to supply the amplifier. If the auxiliary power supply is not handled properly, it may introduce parasitic interference.
The existing technology of the self-sufficient power supply method is to perform high-frequency (above 1MHz) modulation of the PWM drive signal. The signal is added to the primary of the isolation pulse transformer, and the self-sufficient power is obtained through direct rectification at the secondary. The original PWM modulation signal needs to be decomposed Obviously, this method is not simple, and the price is certainly higher. The advantage of modulation is that there is no limit to the duty cycle that can be delivered.
The finished drivers currently on the market can be divided into direct drive and isolation drive based on the electrical relationship between the drive signal and the driven insulated gate device. The isolation components for isolation drive include photocouplers and pulse transformers.
Read recommendations:
The advantages of carbon and aluminum foil in the application of lithium ion battery.button cell bat
Advantages of Environmentally Friendly Lithium-Ion Batteries
Last article:button cell battery cr1620
Next article:18650 battery 3.7v 6000mah
Popular recommendation
18650 battery lithium ion 2200mah
2023-03-2214500 battery
2023-03-22521133 battery maker
2023-03-22Ni-MH batteries Vendor
2023-03-22803040 battery
2023-03-22Hanging neck fan
2022-09-2212V 23A
2022-10-09Coin Battery LR 43
2022-10-15505060 2000mAh 7.4V
2022-08-19Coin Battery CR 3032
2022-09-27R14
2022-08-19401030 90MAH 3.7V
2023-06-12R14
2022-07-01Lithium-ion battery G500
2022-11-22801538 480mAh 3.7V
2022-08-193500mah 18650 battery
2023-06-25LR6 alkaline battery
2023-06-25AA NiMH battery
2023-08-0412v 18650 battery pack
2023-06-256LR61 alkaline battery
2023-06-253.2v 60ah lifepo4 battery.What is the concept of 18650 batteries?
2023-12-05Application of Square Lithium Batteries in Energy Storage Power Stations
2024-10-24button cell battery cr2025
2024-12-04As of my knowledge cutoff in September 2021, the lithium-ion battery industry was experiencing a sig
2023-11-17What are the components and structures of lithium batteries?
2024-09-05The characteristics of lithium iron phosphate battery.solar energy storage system battery pack lithi
2023-03-22Lithium power battery battery work electricity.102450 battery
2023-05-27The technical characteristics and difficulties of nickel -metal hydride battery.solar energy battery
2023-04-15Atomic battery.Nickel Hydride No. 5 batteries
2023-07-06Glamor battery three -stage charging method.solar power energy storage battery wholesale
2023-04-21