2, wireless charger can charge Huawei capacitor pen. Because Huawei's pen supports wireless charging, as long as the pen is attached to the upper side of the tablet, it will automatically adsorb, and then wireless charging, to supplement the power of the pen. Wireless charging breaks the way that power transmission can only rely on direct contact transmission of wires, and belongs to non-contact transmission, which can avoid the problems such as contact spark sliding wear and explosion electric shock that may be brought about by contact power transmission.
3, because the circuit is in a resonant state, even if the receiving coil is not close to the transmitting coil, the no-load current is very small. At the receiving end, resonance is also usedPrinciple to improve the efficiency of energy transmission. Schottky diode is used to rectify the signal, after filtering capacitor processing, to obtain direct current, and then charge the battery. In the best working condition, the charging current can reach more than 0.6A.
4, capacitance is the electric field energy and magnetic field energy conversion material. Wireless charging coils test the capacitance of the coil to the ground because the capacitor is the material that the electric field energy and the magnetic field energy are converted. In the process of wireless charging, the electric field energy and the magnetic field energy need to be converted. The process of wireless charging is the transmission of electric energy from the charging device to the receiving device.
5, the use of magnetic resonance in chargingThe charge is transferred in the air between the device and the device, then the coil and capacitor form a resonance between the charger and the device to achieve efficient transmission. Electromagnetic induction wireless charging technology For the wireless charging technology of this system, the defects are more obvious, the magnetic field will decay rapidly with the increase of distance, and the energy is more than divergent around, so the induced current is far less than the input current, so the energy utilization rate is not high.
6, the resonant frequency of inductor L1 and capacitor C1 is 1MHz, because the circuit is resonant, so when the receiving coil is not near the transmitting coil, the no-load current is very small. The same applies to the receiving end126151, enterprise legal person Wu Guoping, the enterprise is currently in the state of opening. The business scope of Shanghai Zhongya Radio Components Factory is: capacitor sales.
Cixi Xiaolin Town Power Electronics Shanghai Business Department 13041615645 connector Chaoyang Shuangfei Industry and Trade Company Shanghai Business Department 13501667531 Transistor Shanghai Yuke Electronics Business Department 021-63286070 Integrated circuit, connector Shanghai Minke Electronics Co., LTD 13901739589 Resistance components, self recovery fuse, temperature control switch, all kinds of discharger, pressureSensor Sensor.
Shanghai Kejia Wireless Power Plant is a joint-stock cooperative system registered in Jiading District, Shanghai, 1989-07-17, with its registered address located at No. 63, Lane 1258, Jiading Road, Jiading District. The unified social credit code/registration number of Shanghai Kejia wireless Power Plant is 9131011413365696X3, the enterprise legal person Tang Weihao, the enterprise is currently in the state of opening.
This is OK, it is the earliest wireless charging CBB capacitor in the industry, which belongs to the most mature technology at present. The biggest advantage of CBB is that it is cheap, and it only costs a few cents.
Appearance. Millet 69 yuan wireless charging using aluminum alloy shell PC panel, compared to millet 99 yuan appearance will be more high-end. In terms of materials. Millet 69 yuan overall material cost is lower, an obvious difference in the internal material is the use of relatively cheap CBB capacitance not NPO. Performance.
The two car charging models launched by Xiaomi, the main difference between the 49 yuan and 69 yuan versions is the output power and function. The $49 car charger is a single-port design with 9V-2A (18W) fast charging capability, suitable for daily use. The 69 yuan version is significantly improved, supporting dual fast charge, each interface can reach 9V-2A (18W), and 12V-5A (18W), and the total output power is increased to 36W.
The difference between millet car charger 49 yuan and 69 yuan The main difference between millet car charger 49 yuan and 69 yuanIt's the difference in output power. The 49 yuan Xiaomi car charger can only support a single port 9V-2A (18W) fast charge and the 69 yuan Xiaomi car charger can support a maximum of two ports 36W fast charge, that is, 9V-2A (18W) 12V-5A (18W) =36W (meaning to play word games).
Low power is 16W. Xiaomi's car charger is divided into three colors and three powers. Green is low power charging, such as ipone11 charging, blue is a medium power 30W fast charging, the supreme version is 100W orange, the charging power is clear.
Capacitor in the circuit board positive and negative electrode distinction methods are: 1, the most reliable way, multimeter capacitance voltage at both ends, the high voltage side is positive. 2, observe the capacitor screen printing, the "-" mark is the negative electrode, the "" mark is the negative electrode, they usually only draw one.
The circle is divided into two halves, one half is black for negative, and the other half is colorless for positive. The black shadow on the left is the negative terminal, and the right is the positive terminal. Capacitor position on the motherboard, if it is black white, blackThe part is negative, the white part is positive. If it is white or black and colorless, the part that is painted white or black is negative, and the part that is not painted is positive. Under normal circumstances, the range of negative painting part is small.
First, let's look at the differentiation method of in-line electrolytic capacitors. Its positive and negative poles can be distinguished by the length of the pin and the color of the housing: the longer end of the pin is positive, and the shorter end is negative; The pin corresponding to the gray area on the housing is the negative pole, and the other end is the positive pole. The package is usually marked with a "" or painted area as an indication. For the chip aluminum electrolytic capacitor, the obtuse part on the base corresponds to the positive electrode,The straight side corresponds to the negative pole.
In-line electrolytic capacitors distinguish between positive and negative electrodes. The positive and negative electrodes of the in-line electrolytic capacitor can be distinguished by the length of the pin and the color of the housing, and the pin length is positive; Short pin is negative; The gray part of the housing with a small area corresponds to a negative pin and the other end is positive. For encapsulation, the positive terminal is generally indicated by marking ""; Or the negative electrode can be represented by a painted area. Aluminum electrolytic capacitors distinguish between positive and negative electrodes.
Single panel. On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side. Since the wire only appears on one side, this PCB is called a single panel. Dual panel. Both sides of this circuit board have wiring, but to use the wires on both sides, there must be an appropriate circuit connection between the two sides. Multi-layer board.
1. Different media. It's the material between the two plates of the capacitor. Most polar capacitors use electrolytes as dielectric materials, and usually the same volume of capacitors have large polar capacitance. In addition, the capacity of polar capacitors manufactured by different electrolyte materials and processes will also be the same volumeDifferent. There is also a close relationship between pressure resistance and the use of dielectric materials. Non-polar capacitive dielectric materials are also many, mostly using metal oxide film, polyester and so on.
2, the medium is different, the polar capacitor mostly uses the electrolyte as the medium, usually the capacity is larger under the same volume. The electrolyte material and manufacturing process determine the capacity difference and also affect the voltage resistance. The dielectric materials of non-polar capacitors are diverse, and metal oxide film and polyester are mostly used. The reversibility of the medium affects the application scenarios of polar and non-polar capacitors. In terms of performance, when polar capacitors are used as filters in the power supply part, capacity and voltage resistance are key pointsBid.
3, different uses polar electrolytic capacitors are mainly used for DC filtering and signal coupling circuits with low requirements, non-polar electrolytic capacitors are used for AC motor startup; High demand signal coupling. Different shapes polar capacitors are round, square type is used very little, non-polar capacitors have a variety of shapes, like tube type, deformed rectangle, combined square type and round type.
4, the difference in capacity: the general capacity of polar capacitors is a few micromethods to thousands of micromethods, the general capacity of non-polar capacitors is small, a few P to a few micromethods, and then the larger volume is much larger, industrial use. The difference in the circuitPolar capacitors can only be used in direct current circuits, and positive and negative polarity can not be connected to the wrong, non-polar capacitors can be applied to AC and DC circuits.