Вести
How to solve the problem of power module selection
Автор: ZYG Power Module Time： 2022-12-20
It is not easy to select a power module. There are many difficulties to consider. How much do you know?
Magnetic beads, capacitors, diodes, resistors… all have similar inside stories, but people don’t pay much attention to them. There are various topologies of power modules, such as flyback, forward, push-pull, half-bridge, and full-bridge. Due to their different basic principles, each of them is mainly manifested in the advantages at the level of certain characteristic indicators.
The flyback power supply does not have a time period for charging and discharging the battery during the power switch period. That is because there is no time characteristic of the response characteristic, and the grain baud cannot be guaranteed to be very good, although it may not help much according to the energy storage capacitor , but the rationale is just a flaw.
Leakage inductance is also a big problem, but its advantages are simple power supply circuit, low cost, light weight, no need to add magnetic calibration windings, and a wider operating voltage range for typing. Because of this, its share of the total power supply sales market is about 7%.
The output voltage of the positive power supply has good transient operation characteristics and strong load capacity, but its disadvantages are also obvious. The large energy storage technology is used to filter the inductor and the freewheeling diode, which is large in size, and the back electromotive force of the primary coil of the transformer is high. .
The push-pull power supply has high transient response time, good working voltage and frequency characteristics. It is the most utilized power transformer of all topologies. No flux leakage, simple optocoupler circuit.
If the two forward converters are not completely symmetrical or balanced, the bias magnetism accumulated after many cycles will cause the magnetic core to enter a saturated state, resulting in excessive excitation current of the high-frequency transformer, and even damage the power switch tube.
The accumulative chainless power supply transformer has a large power and high working efficiency, the withstand voltage test value of the power switch tube is relatively low, and the primary coil of the transformer only needs to be wound once. The disadvantage is that the efficiency is low, there is a semiconductor area, and the consumption is large.
The above problems are all caused by the inherent advantages and disadvantages of its topology. Although people can use the power module as the black box of the aircraft, this is also a point that needs to be paid attention to when choosing a power supply.
Претходно: How to choose a power module and precautions, each is very important
Следно: The Importance of Quality Control in China DC-DC Converter Manufacturing
релевантни информации
-
2023-4-14
Transforming Power: The AC-DC Converter
Power is an essential component of modern life, powering everything from the devices we use in our homes to the machinery used in factories. However, the form in which we receive power from the grid is alternating current (AC), while many of the electronic devices we use require direct current (DC). In order to convert AC power to DC power, we use AC-DC converters. AC power is generated by power plants in the form of a sine wave, with a frequency of 50 or 60 Hz, depending on the region. This AC power is then transmitted through power lines to reach households and businesses. However, many electronic devices require a steady DC voltage to operate. This is where AC-DC converters...
Погледнете детали -
2023-6-2
DC Power Conversion: Efficient and Reliable Solutions for Energy Management
In today's world, the demand for energy continues to increase, while the resources to meet that demand are finite. As we strive to find more efficient ways to utilize and manage our energy resources, one technology that has gained tremendous popularity is DC power conversion. DC power conversion involves the transformation of AC (alternating current) power into DC (direct current) power, which can then be used to power a wide range of devices and systems. This technology is particularly useful in applications that require a high degree of efficiency and reliability, such as data centers, telecommunications networks, and renewable energy systems. One of the key advantages of DC power conversion is its ability to reduce energy waste. Traditional AC power...
Погледнете детали -
2023-7-11
The Medical Power Series: Revolutionizing Healthcare
In today's world, healthcare is a critical aspect of our lives. It is essential for the well-being and longevity of individuals. Over the years, medical advancements have played a significant role in improving healthcare outcomes and saving countless lives. One such breakthrough is the Medical Power Series, an innovative set of technologies that is revolutionizing the field of healthcare. The Medical Power Series is a collection of cutting-edge medical devices, software, and systems that are designed to enhance patient care, improve diagnostics, and streamline healthcare processes. These advancements have the potential to transform the way healthcare is delivered, making it more efficient, accessible, and patient-centered. One of the flagship technologies in the Medical Power Series is the Electronic Health Record...
Погледнете детали -
2023-6-12
The Medical Power Series is an innovative line of medical equipment that has revolutionized the healthcare industry. The product series is designed to provide doctors, nurses, and other healthcare professionals with the tools necessary to deliver the highest quality care to their patients. The Medical Power Series includes a range of products, each with their unique features and benefits. The Medical Power Series comprises a range of medical equipment designed for different purposes. The series includes surgical instruments, diagnostic tools, patient monitoring devices, and other medical devices. The surgical instruments in the Medical Power Series are made from high-quality materials and are designed to be easy to use, reliable, and durable. The diagnostic tools in the Medical Power Series include...
Погледнете детали -
2023-6-3
12V 15A AC to DC Converter: Transforming Alternating Current into Direct Current
In today's world, electricity is an essential part of our daily lives. We use it to power our homes, workplaces, and even our vehicles. However, the electrical power that we receive from the grid is in the form of alternating current (AC), which is not suitable for many devices that require direct current (DC) to operate. This is where a 12V 15A AC to DC converter comes in. As the name suggests, this device converts AC power into DC power, making it possible to power DC devices from an AC source. The process of converting AC power to DC power involves several stages. The first stage is rectification, which involves converting the AC signal into a pulsating DC signal. This...
Погледнете детали -
2023-8-8
The Electric Power Series: Powering the Future with Electricity
Electricity has become an integral part of our daily lives. From lighting up our homes to powering our electronic devices, electricity has transformed the way we live and work. As we move towards a more sustainable future, the importance of harnessing electricity as a clean and renewable energy source has become increasingly evident. In this article, we will explore the various aspects of the electric power series and how it is revolutionizing the way we power the future. To begin with, let's understand what the electric power series entails. It refers to the generation, transmission, and distribution of electricity from its source to the end-users. The electric power series consists of power plants, power grids, and the infrastructure needed to...
Погледнете детали