1. Charging Stations Market Prospect under the New Infrastructure Construction   The charging station is the “energy station” of the new energy automobiles. According to a research report (Source: KBV Research), the global electric vehicle charging infrastructure market size is anticipated to reach $72.5 billion by 2025, rising at a market growth of 38.5% CAGR during the forecast period 2019-2025. As the number of electric vehicles on the road increase, so is the demand for electric vehicle charging stations. The innovation and development of electric vehicles is a prime mover for growth in the global electric vehicle charging station market. For new infrastructure construction, increasing global government support, the push from world level organizations in reducing carbon footprint, and the collective efforts from companies worldwide are the other major factors bringing a large potential opportunity for the charging station segment. Analysts suggested that the Asia Pacific...

  Smart grids are a necessity in the modern world with their ability to react to changes in both supply and demand of electrical power — and along the evolution of smart grids, there is a high demand for power electronic solutions that are efficient, effective, and reliable.   Smart grids use a mix of energy sources (many of which are renewable) to provide an environmentally responsible, reliable solution to electrical power needs. Smart grids are efficient, compatible with smart devices and smart homes, and support the growing use of electric and hybrid vehicles. They also lead to economic savings and better management of energy consumption.    Within a smart grid, the major actions that take place are power generation, transmission, transformation, distribution, and consumption. The image below shows a typical block diagram for a smart grid. Power is routinely generated by multiple sources, such as wind turbines that  include a wind-solar complementary control...

  Switching power supplies are widely used in medical devices , such as a ventilator, mask machine, PCR nucleic acid detector, body temperature detector, multi-parameter monitor, x ray, CT/PET, blood analyzer, heart-lung machines, and diagnostic devices, etc. X ray machine power supply  is one of the most popular medical power supplies. Follow these tips to select the most suitable safe, low leakage current, reliable insulation, and good EMC performance power supplies for the ”heart” of the medical device.   Keywords: Medical device, Medical power supply, Ventilator   Types of Medical Applications Medical device not only needs to consider operator protection, such as doctor and nurse but also patient protection. The requirements of the operator and patient protection are different. Since the health state of a patient and operator is different and the patient normally is in a weaker state, thus a higher level of protection is required for the patient. The medical devi...

  In the power supply application, to ensure the stability and the safety of the power supply, peripheral protection circuits are often designed to ensure that the power supply is not damaged during use. Peripheral circuits include surge protection circuit, electrostatic protection circuit, EMI filter circuit, and pulse group anti-interference circuit. This paper will discuss the use and selection methods of MOV applied in surge protection circuits.   Ⅰ. What are Metal Oxide Varistors? MOV stands for Metal Oxide Varistors, a voltage-limiting protection device with nonlinear volt-ampere characteristics. It is a matrix structure composed of zinc oxide particles. The grain boundaries between the particles have electrical characteristics similar to bidirectional PN junctions. Application of MOV: MOV is often used in parallel with the protection device to clamp the voltage when the circuit is subjected to overvoltage, absorbing excessive current to protect the subsequent circuit. M...

  An important point to consider when choosing a power module is whether to use an isolated or non-isolated power solution. Before proceeding with the discussion, let us first understand the concept of isolated power supply and the main characteristics of isolated and non-isolated power.   What is the isolated power supply?  The isolated power supply is defined conceptually as the conversion of the voltage through a transformer to realize the isolation between input and output.     Then, what are the isolation features? For example, safety isolation, common-mode noise isolation, ground loop elimination, or for occasions with floating ground requirements, are its key features.   In addition to isolation, voltage conversion is also one of the important characteristics of power supply, including AC to DC, DC to AC, conversion between high and low voltage, and so on. What is more, with some peripheral devices, it can also stabilize the voltage, so as to protect...

  Overvoltage is a concept that engineers often hear in the field of power electronics. But many engineers don't understand this concept very well. Here, I'll share what I know with everyone, and sincerely hope it will help.    1. System overvoltage First of all, what is the system overvoltage? In a power system, any waveform whose peak voltage exceeds the highest peak voltage in the normal operation of the power system belongs to system overvoltage. System overvoltage is an abnormal state in the operation of the power system. The probability and severity of overvoltage are determined by the local climate and design level of the power system. In the normal operation of the power system, it is almost impossible to predict the system overvoltage.   According to the location of overvoltage, it can be divided into two categories, one is external overvoltage, the other is internal overvoltage. The external overvoltage, also known as lightning overvoltage, is divided into ...

  The conducted emissions (CE) test is a common test item in the EMC test. As a field application engineer at MORNSUN POWER, I'm pleased to share what I know about EMC knowledge with engineers, and sincerely hope it will help with the power supply design of your system.    1. Electromagnetic compatibility (EMC) First, let's take a look at what EMC is. The full name of EMC is electromagnetic compatibility, which refers to the ability of equipment or system to work normally in its electromagnetic environment and not to produce intolerable electromagnetic interference to any other equipment in its environment. In daily life, thunder and static electricity can be seen everywhere. At ordinary times, common electronic equipment and natural phenomena will produce electromagnetic interference. How to make electronic equipment work normally in such a complex electromagnetic environment without affecting the surrounding electromagnetic sensitive equipment is the EMC we want to rese...