Showing posts with label tiny. Show all posts
Showing posts with label tiny. Show all posts
Monday, December 23, 2013
Optical technology is tiny particles can be captured
In order to change this situation, the United States, Illinois, New York University and an optical company scientists, researchers tested a product called "light trap" technology, trying to be more convenient to manipulate carbon nanotubes. Optical technology is tiny particles can be captured using the signal capturing ability to move the signal beam in the signal to follow the movement of the fine particles. Signal can capture tiny particles, so it would be like tweezers to move tiny particles moving folder. The quality of the products offered by the two subcontractors phone boosters are very good.
The most common problem is reported use of micro-cellular phone may display you have five full signal strength. Call directly into voicemail ring. The reason is because the micro cellular behind the idea under the premise of the construction site, to build a miniature battery. The microcell tether recent site, and then take advantage of the Wi-Fi signal, in order to strengthen their reception and transmission bandwidth.
The pursuit of low-cost mobile phone maker has also spawned a number of new business opportunities. The original baseband IC field is Texas Instruments. However, these always attaches great importance to the base price of the domestic mobile phone manufacturers in the industry with handset manufacturers dissatisfaction, a significant loss. Once a suitable alternative suppliers, domestic mobile phone manufacturers immediately anti-Ge. Other suppliers is Taiwans largest IC design company MediaTek. MediaTek low-cost baseband IC quickly captured the mainland market, almost all of the Chinese mobile phone manufacturers, including Asus and BenQ MediaTek customers. After the installation is complete, turn off the circuit breaker or phone boosters, and turn on the power switch. Texas Instruments beat beaten. MediaTek are cashing overflow, MediaTeks report shows, pre-tax income of the U.S. dollar, the Taiwan stock market profits. Most of the mobile phone industry chain manufacturers and performance of domestic mobile phone manufacturers.
Keeping that in mind, rarely introduced new equipment call phone signal booster, market a few years ago. , Phone booster introduced several years ago, but as time goes by, and its technology has been updated. In such a small period of time to introduce mobile phone supercharger technology has improvised a lot of times, this is a cell phone signal amplifier on the market a wide range of reasons.
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The most common problem is reported use of micro-cellular phone may display you have five full signal strength. Call directly into voicemail ring. The reason is because the micro cellular behind the idea under the premise of the construction site, to build a miniature battery. The microcell tether recent site, and then take advantage of the Wi-Fi signal, in order to strengthen their reception and transmission bandwidth.
The pursuit of low-cost mobile phone maker has also spawned a number of new business opportunities. The original baseband IC field is Texas Instruments. However, these always attaches great importance to the base price of the domestic mobile phone manufacturers in the industry with handset manufacturers dissatisfaction, a significant loss. Once a suitable alternative suppliers, domestic mobile phone manufacturers immediately anti-Ge. Other suppliers is Taiwans largest IC design company MediaTek. MediaTek low-cost baseband IC quickly captured the mainland market, almost all of the Chinese mobile phone manufacturers, including Asus and BenQ MediaTek customers. After the installation is complete, turn off the circuit breaker or phone boosters, and turn on the power switch. Texas Instruments beat beaten. MediaTek are cashing overflow, MediaTeks report shows, pre-tax income of the U.S. dollar, the Taiwan stock market profits. Most of the mobile phone industry chain manufacturers and performance of domestic mobile phone manufacturers.
Keeping that in mind, rarely introduced new equipment call phone signal booster, market a few years ago. , Phone booster introduced several years ago, but as time goes by, and its technology has been updated. In such a small period of time to introduce mobile phone supercharger technology has improvised a lot of times, this is a cell phone signal amplifier on the market a wide range of reasons.
Friday, March 15, 2013
Making a 200 watt Compact PWM Inverter Circuit Using Tiny Ferrite Transformer
This circuit was requested by a few of the dedicated followers of this blog, namely Mr. Rashid, Mr, Sandeep and also by a few more readers. Initially I could not figure out the concept behind these compact inverters which completely eliminated the bulky iron core transformers. However after some thinking it seems I have succeeded in discovering the very simple principle associated with the functioning of such inverters.
Lately the Chinese compact type inverters have become pretty famous just because of their compact and sleek sizes which make them outstandingly light weight and yet hugely efficient with their power output specs.
Initially I thought the concept to be unfeasible, because according to me the use of tiny ferrite transformers for low frequency inverter application appeared highly impossible.
Inverters for domestic use requires 50/60 Hz and for implementing ferrite transformer we would require very high frequencies, so the idea looked highly complicated.
However after some thinking I was amazed and happy to discover a simple idea for implementing the design. Its all about converting the battery voltage to 220 or 120 mains voltage at very high frequency, and switching the output to 50/60 HZ using an push-pull mosfet stage.
Looking at the figure we can simply witness and figure out the whole idea. Here the battery voltage is first converted to high frequency PWM pulses. These pulses are dumped into a step up ferrite transformer having the required appropriate rating. The pulses are applied using a mosfet so that the battery current can be utilized optimally.
The ferrite transformer steps up the voltage to 220V at it output. However since this voltage has a frequency of around 60 to 100kHz, cannot be directly used for operating the domestic appliances and therefore needs further processing.
In the next step this voltage is rectified, filtered and converted to 220V DC. This high voltage DC is finally switched to 50 Hz frequency so that it may be used for operating the household appliances.
Kindly note that though the circuit has been exclusively designed by me, it hasnt been tested practically, make it at your own risk and on;y if you have sufficient confidence over the given explanations.
Parts List for 12V DC to 220V AC compact ferrite core inverter circuit.
R3---R6 = 470 Ohms
R9, R10 = 10K,
R1,R2,C1,C2 = calculate to generate 100kHz freq.
R7,R8 = 27K
C3, C4 = 0.47uF
T1----T4 = BC547,
T5 = any 30V 20Amp N-channel mosfet,
T6, T7 = any, 400V, 3 amp mosfet.
Diodes = fast recovery, high speed type.
TR1 = primary, 13V, 10amp, secondary = 250-0-250, 3amp. E-core ferrite transformer....ask an expert winder and transformer designer for help.
Lately the Chinese compact type inverters have become pretty famous just because of their compact and sleek sizes which make them outstandingly light weight and yet hugely efficient with their power output specs.
Initially I thought the concept to be unfeasible, because according to me the use of tiny ferrite transformers for low frequency inverter application appeared highly impossible.
Inverters for domestic use requires 50/60 Hz and for implementing ferrite transformer we would require very high frequencies, so the idea looked highly complicated.
However after some thinking I was amazed and happy to discover a simple idea for implementing the design. Its all about converting the battery voltage to 220 or 120 mains voltage at very high frequency, and switching the output to 50/60 HZ using an push-pull mosfet stage.
Looking at the figure we can simply witness and figure out the whole idea. Here the battery voltage is first converted to high frequency PWM pulses. These pulses are dumped into a step up ferrite transformer having the required appropriate rating. The pulses are applied using a mosfet so that the battery current can be utilized optimally.
The ferrite transformer steps up the voltage to 220V at it output. However since this voltage has a frequency of around 60 to 100kHz, cannot be directly used for operating the domestic appliances and therefore needs further processing.
In the next step this voltage is rectified, filtered and converted to 220V DC. This high voltage DC is finally switched to 50 Hz frequency so that it may be used for operating the household appliances.
Kindly note that though the circuit has been exclusively designed by me, it hasnt been tested practically, make it at your own risk and on;y if you have sufficient confidence over the given explanations.
R3---R6 = 470 Ohms
R9, R10 = 10K,
R1,R2,C1,C2 = calculate to generate 100kHz freq.
R7,R8 = 27K
C3, C4 = 0.47uF
T1----T4 = BC547,
T5 = any 30V 20Amp N-channel mosfet,
T6, T7 = any, 400V, 3 amp mosfet.
Diodes = fast recovery, high speed type.
TR1 = primary, 13V, 10amp, secondary = 250-0-250, 3amp. E-core ferrite transformer....ask an expert winder and transformer designer for help.
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