18650 rechargeable battery lithium 3.7v 3500mah
CH
About Us
Company Profile Development History Sales Network Partner Social Responsibility
Products
Rechargeable Battery Battery Packs Energy Storage Battery Primary Battery Handicraft Article
Subsidiary Company
SINO TECHNOLOGY SUNBEAM GREEN POWER DATAPOWER SEONG-HEE STD
Honor
Qualification Certificate Patent Certificate Honor Certificate
R&D
R&D Center Test Center
News
Company News Industry News
Contact Us
18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah
polymer lithium battery

Primary battery

Rechargeable Battery

LR03 alkaline battery

button cell battery cr2025

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:

Coin Battery LR 1121

The process of customization of lithium battery custom manufacturers.home solar energy storage lithi

Types and Characteristics of Lithium Polymer Batteries

1.5V Carbon Zinc Battery

18650 battery 3.7v 2200mah

Last article:button cell battery cr1620

Next article:18650 battery 3.7v 6000mah

Popular recommendation

802540 lipo battery company

2023-03-22

18650 lithium ion battery cell

2023-03-22

703048 battery direct sales

2023-03-22

803040 battery

2023-03-22

522749 battery wholesaler

2023-03-22

LR03

2022-07-23

LR6

2022-07-01

Lithium-ion battery GN200 60000mAh

2022-08-19

Coin Battery CR 1220

2022-09-27

18650 2400mAh 3.7V

2022-08-19

Coin Battery CR 2320

2022-09-27

522749 880mAh 3.7V

2022-08-19

601435 270MAH 3.7V

2023-06-12

701221 120MAH 3.7V

2023-06-10

702535 600mAh 3.7V

2022-08-19

no. 7 alkaline battery

2023-06-25

18650 battery 2500mah

2023-06-25

102450 battery

2023-06-25

21700 battery

2023-06-25

dry cell battery

2023-06-25

Lithium-ion Batteries with Ternary Materials

2024-11-25

402030 battery.Range of charging voltage for lithium iron phosphate battery packs

2023-12-14

Which method is best for whole body hair removal.lithium battery 18650 3.7v

2023-09-11

The influence of charge transfer resistance on low-temperature performance.LR44 battery

2024-07-03

Drone battery charging.portable energy storage battery power supply Manufacturing

2023-04-24

What role does lithium iron phosphate battery play in the energy storage market?1.5V rechargeable ba

2023-03-08

What are the popular product advantages of large capacity lithium batteries!18650 battery 3500mah li

2023-08-26

What is the difference between lithium batteries and polymer lithium batteries?Nickel Hydride No. 5

2023-09-08

Disadvantages of ternary lithium battery.rechargeable solar energy storage battery

2023-03-28

New zinc silver battery.18650 battery lithium ion 2200mah

2023-07-05
360° FACTORY VR TOUR
lithium ion battery 18650 priceWhatsapp
lithium ion battery 18650 price

lithium ion battery 18650 priceTel
+86 19925278095

lithium ion battery 18650 priceEmail
admin@sino-techgroup.com

TOP