What are unipolar PWM mode and bipolar PWM mode

PWM is pulse modulation technology, for PWM, we know more or less. In the previous article, the PWM control principle and SPWM control principle are introduced. In order to enhance our understanding of PWM technology, this paper will elaborate the unipolar PWM mode and bipolar PWM mode. If you are interested in PWM, you may […]

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PWM control and how to generate sine PWM wave

PWM is also called pulse width modulation. Through PWM, the pulse bandwidth can be adjusted. For PWM technology, automation, electronics friends are more familiar. In order to enhance our understanding of PWM, this paper will introduce the PWM control and the generation of SPWM wave. If you are interested in PWM, you may as well […]

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The protection circuit of switching power supply is explained in detail

Input undervoltage protection circuit 1、 Input undervoltage protection circuit 1 1. Overview (circuit category, main function description) When the input voltage is lower than the protection voltage, the power supply VCC of the control chip is pulled down, so as to turn off the output. 2. Circuit composition (schematic diagram) 3. Working principle analysis (main […]

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What is the difference between PFC power supply and switching power supply

PFC power supply 01 The English full name of PFC is “powerfactor correction”, which means “power factor correction”. Power factor refers to the relationship between effective power and total power consumption (apparent power), that is, the ratio of effective power divided by total power consumption (apparent power). Basically, power factor can measure the degree of […]

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Domestic graphene fast charging battery will be carried on the EA V model

Recently, GAC e’an’s 8-minute charging 80% and 1000 km battery has aroused heated discussion. Some academicians questioned that cheap and mass-produced batteries that combine two technologies are deceptive at present. Subsequently, GAC announced that it clarified that graphene super fast charging battery and long-term silicon negative battery are two different battery technologies, which respectively solve […]

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Domestic silicon negative battery will be carried on EIAn LX

In addition to graphene based super fast charging battery, another long-term vehicle will be equipped with silicon negative battery technology, and the first vehicle equipped with this battery technology will be EA LX, which can achieve 1000 km driving range and will be put into production within this year. In addition, it is reported that […]

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Design scheme of NC adjustable switching power supply based on lm2576

Switching regulated power supply is widely used in electronic equipment because of its small size, light weight and high conversion efficiency, but this kind of power supply is only suitable for occasions with fixed output voltage or small variation range. Therefore, this paper proposes a series switching power supply composed of single-chip switching regulator lm2576-adj […]

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Explore solar energy collection technology

Five methods of solar energy collection Imagine a black frying pan in the Mojave Desert during the day. The frying pan will gradually get hot and feel hot, and the final temperature will exceed 90 ° C (195 ° f). Beat an egg in the pan and the egg will be completely cooked in a […]

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New thermal regulated lithium iron phosphate battery developed in USA

According to reports, Professor Wang Chaoyang’s team of Pennsylvania State University has developed a thermal regulated lithium iron phosphate battery (TMB), which can simultaneously solve the two major problems of “mileage worry” and “charging time worry” about new energy vehicles. Specifically, the LiFePO4 battery can last about 250 miles in only 10 minutes of charging, […]

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