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SCR, short for thyristor rectifier, is a four-layer high-power semiconductor device with three PN junctions, also known as a thyristor. It has the characteristics of small size, relatively simple structure and strong function, and is one of the more commonly used semiconductor devices. The device is widely used in various electronic equipment and electronic products, and is used for controllable rectification, inverter, frequency conversion, voltage regulation, and non-contact switching....
Abstract With the rapid development of the electric vehicle market, shorter charging time and longer cruising range have challenged the power battery. In terms of cruising range, devices with high energy storage capacity are needed, and power density and energy density are undoubtedly two weight factors. Super capacitors in energy storage... With the rapid development of the electric vehicle market, shorter charging time and longer cruising range pose challenges to the power battery. In terms...
Photocoupler The EPCOS MKP B3267*P* series of film capacitors from the TDK Group has a very small volume, for example a capacitance of 1 μF and a voltage rating of 450 V DC. The capacitance is extremely high and the lead spacing is only 10 mm, only 8.0 x 17.5 x 13.0 mm3. Compared to previous capacitive models with lead spacing of 15 mm, the volume is reduced by approximately 40%. The lead spacing for the new product line is 10 mm, 15 mm and 22.5 mm. They are rated at 450 V DC, 520 V DC and 630...
Film capacitors are ubiquitous in our lives. Its applications are very wide, such as our common air conditioners, refrigerators, washing machines, water heaters, etc. Today, Xiao Bian took everyone to know about the film capacitors, what is the absorption coefficient of the film capacitors? , The role of the film capacitance absorption coefficient and the occurrence of abnormal conditions. Follow the progress of Xiao Bian to learn about it! A film capacitor is a type of capacitor in which a...
Photocoupler The EPCOS MKP B3267*P* series of film capacitors from the TDK Group has a very small volume, for example a capacitance of 1 μF and a voltage rating of 450 V DC. The capacitance is extremely high and the lead spacing is only 10 mm, only 8.0 x 17.5 x 13.0 mm3. Compared to previous capacitive models with lead spacing of 15 mm, the volume is reduced by approximately 40%. The lead spacing for the new product line is 10 mm, 15 mm and 22.5 mm. They are rated at 450 V DC, 520 V DC and 630...
On November 10th, Huachuang Securities Chemical Researcher investigated Nanyang Technology. Nanyang science and technology fundraising projects are at the right moment, and the downstream demand is strong. The company used the raised capital of 160 million yuan to build a 2,500-ton ultra-thin high-temperature metallized film project, which is expected to be completed and put into production in May 2011. It will achieve 30% of design capacity in the year and reach 80% in the second year. The...
In 011, the company achieved operating income of 1.037 billion yuan, a year-on-year increase of 27.6%; The operating profit was 128 million yuan, an increase of 47.21% year-on-year; the net profit attributable to the parent company owner was 104 million yuan, a year-on-year increase of 21.43%; the basic earnings per share was 0.6530 yuan/share, and the profit distribution plan was to increase 3 shares for every 10 shares. The company's main business revenue in 2011 was 1.037 billion yuan, a...
Membrane capacitors are widely used in the cross-linking of analog signals, the bypass of power noise (reverse cross-linking), etc. The film capacitor is a capacitor with metal foil as the electrode, and it is wound with a plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate, etc. from both ends and wound into a cylindrical structure. According to the type of plastic film, they are also called polyethylene capacitors (also called Mylar capacitors), polypropylene...
Photocoupler The TDK Group has introduced new capacitor products that significantly expand the range of single-phase power capacitors used in industrial electronics. The B32370* to B32374* series capacitors are specified from 250VRMS to 600VRMS and range from 5μF to 600μF. The maximum current capability of different types of capacitors ranges from 15A to 60A. Capacitors range in diameter from 40mm to 136mm and heights range from 64mm to 265mm. The newly introduced capacitors are extremely...
The utility model discloses a packaging mechanism of a metalized film capacitor core mask packaging machine, which belongs to the field of machinery. It is composed of a vertical large plate, a core feeding device, a mask tape tension adjusting device, a pressure tape device, a pressure chain shaping device, an arc forming device, a guide damping device, and a working platform. The cylinder drive is its main feature. . The utility model has the characteristics of being able to be used for the...
This time we discuss some applications of power film capacitors in new energy vehicles. Most of what I said earlier are some semiconductor devices, which is very important. Among all the devices, in fact, some other devices are still very important. Its product selection and its characteristics are actually very important for your equipment. I will take a few minutes to introduce our company. In fact, the parent company of Redo Electronics is Fujian Torch Electronics. What everyone sees on the...
Capacitors vary depending on the medium, such as electrolyte capacitors, paper capacitors, film capacitors, ceramic capacitors, mica capacitors, and air capacitors. However, the most frequently used in audio equipment is electrolytic capacitors and film capacitors. Electrolytic capacitors are mostly used where large capacitance is required, such as filter capacitors in the main power supply, in addition to filtering, and also for storing electrical energy. Thin film capacitors are widely used...
In an embedded design, the MCU is required to enter a low-power idle/sleep mode from a power-intensive, processing-intensive mode of operation. These conversions can easily cause a sharp increase in line loss, which is very high, reaching 20A/ms or even faster. Bypass capacitors are often used to address load changes caused by high-speed devices in the system to ensure power supply output stability and good transient response. The bypass capacitor is an energy storage device that supplies...
For capacitors, miniaturization and high capacity are eternal trends. Among them, the number of multilayer ceramic capacitors (MLCC) is the fastest growing. Multi-layer ceramic capacitors are widely used in portable products, but in recent years, technological advances in digital products have placed new demands on them. For example, mobile phones require higher transmission rates and higher performance; baseband processors require high speed and low voltage; LCD modules require low thickness...
【Chinese instrument network instrument research and development】 Recently, Professor Ma Mingming's group of professors at the School of Chemistry and Materials Science, University of Science and Technology of China, has designed a high-strength supramolecular hydrogel made of conductive polyaniline and polyvinyl alcohol through dynamic chemical bond cross-linking. As a electrode material, a flexible all-solid supercapacitor with high specific capacity and stability was prepared. This result was...
Capacitors are almost indispensable energy storage elements in electronic circuits. They have the characteristics of blocking DC, communicating with AC, and blocking low frequencies. Widely used in coupling, blocking, bypass, filtering, tuning, energy conversion and automatic control circuits. The next small series for everyone to introduce the role of capacitors and capacitor types. The role of the capacitor Capacitors in the circuit have DC blocking and AC switching functions, and are...
The general view is that a relatively large external capacitor with a small equivalent series resistance (ESR) can well absorb the peak (ripple) current during fast switching. However, sometimes such a choice is liable to cause instability of the regulator (especially the linear regulator LDO), so the capacitance of the small-capacity and large-capacity capacitors must be properly selected. Always remember that a voltage regulator is an amplifier that can appear in a variety of situations that...
Recently, the State Grid Corporation major science and technology project "UHV engineering with high electrical life switch capacitor switchgear research and engineering applications" passed the company's acceptance. This project is led by China Electric Power Research Institute. The project succeeded in developing a capacitor bank circuit breaker with a power life of 3000 times, which provided strong support for the selection of UHV engineering equipment. As the main means of system reactive...
1-1. Basic Principles of Capacitors The basic principle of a capacitor can be described using Figure 1-1. Original Position Original Position When a voltage is applied to two metal electrodes facing each other, the charge is stored according to the voltage. The original position Q=CV Fig. 1-1 Original position Q: Power (C) Original Position V: voltage (V) original position C: Capacity (F C: The capacitance of the capacitor, which can be represented by the electrode area S [m2], the dielectric...
Scientists at the National Physical Laboratory in the UK have developed a new lead-free high-temperature ceramic capacitor that can significantly improve the energy efficiency and reliability of hybrid and pure electric vehicles. Hybrid and pure electric vehicles are very dependent on energy conversion efficiency and battery management system. In addition, automotive vehicle power appliances have a market size of approximately 61 billion U.S. dollars worldwide. The challenge facing many...
Recently, the research team of the Institute of Electrical Engineering of the Chinese Academy of Sciences Ma Yanwei has developed a new type of solid-state flexible supercapacitor with high area specific capacity, excellent charge and discharge cycle performance, and flexibility. The relevant research results were published in the international material journal Adv. Mater (2015, doi:10.1002/adma.201503543) and have applied for national invention patents. Current solid-state flexible...
MOS power IC full range SMD aluminum electrolytic capacitor Tantalum capacitor X capacitor design guidelines for switching power supplies: Refer to the AD1118 X Capacitor Placement Principle: 1. Before the common mode choke: 105/275VAC (MKP/X2) 2. After the common mode choke: 474/275VAC (MKP/X2) Refer to MW SP200-12 X Capacitor Placement Principle: 1. Before the common mode choke: 1uF/275VAC (MKP/X2) 2. After the common mode choke: 0.33uF/275VAC (MKP/X2) Refer to MW S145-12 X Capacitor...
Single-phase motors are divided into YL double-capacitor motors and YC single-capacitor motors. Many customers and friends are not clear about the difference between the two. Therefore, let's listen to the editor of Dalan Motor to tell you the difference between the two. YL double capacitor asynchronous motor, also known as "capacitor start and run", refers to a motor with start capacitor and running capacitor. The starting capacitor is mainly to increase the starting torque of the motor. When...
First, the experimental preparation 1. The knowledge points that should be possessed when doing this experiment: 1) Three-point LC oscillator 2) Sile and Clap circuit 3) Influence of power supply voltage, coupling capacitance, feedback coefficient and equivalent Q value on oscillator operation 2. The instrument used in this experiment: 1) LC oscillator module 2) Double trace oscilloscope 3) Multimeter Second, the purpose of the experiment 1. Familiar with electronic components and high...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.