When the brakes are applied or the electric vehicle is decelerating, the motor transforms into an alternator and generates power, which is then returned to the battery. 2. Working Principles of HEV It has a fuel tank similar to a regular car that supplies gas to the engine. A set of batt...
TIG welding uses a tungsten electrode to create an arc to create a weld. It also requires using an inert shielding gas to prevent a reaction from the air around it. The shielding gas in TIG welding is usually pure argon or argon mixed with helium. The mixture of helium and argonminimizes...
Electric avenues:if you’re driving a car that needs to be fueled up, chances are your vehicle runs on an internal-combustion engine (ICE), powered by gasoline or diesel fuel. Electric vehicles (EVs) have a battery instead of a gasoline tank and an electric motor instead of an ICE. ...
Gas discharge lamp operation during AC mains failure - uses transistor control of emergency unit which is periodically blocked, thus reversing polarityA d.c. emergency generator is in parallel with the a.c. network, and its polarity is varied. The method comprises following consecutive steps. A ...
Why isn’t AC eco-friendly? Air conditioners use a lot of electricity to operate. Electricity production emits carbon dioxide into the atmosphere. Carbon dioxide is considered a greenhouse gas. And, at high levels, can contribute to global warming. Additionally, air conditioners use refrigerant. ...
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Variable speed drives (VSD) are sometimes called Variable Frequency Drives (VFD) or AC drives. Using variable speed drives to control motors can lead to big savings Nearly 70 percent of all industrial electrical energy use goes to powering electric motors. These motors are the workhorses of busi...
Glass melting has been carried out for nearly 6000 years and for most of that time wood was used as the energy source. It was only comparatively recently in around 1880 that the industry began to use fossil fuels like oil and natural gas. At this time, the regenerator had already bee...
If there's a leak,the first thing to do is to__the gas supplyA break offB shut offC turn downD get down 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 正确选项:B,切断原句意思是:如果发生泄漏,第一件要做的事是【切断】瓦斯供应.错误选项A:break off是中断的意思,...
Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A,B,C and D. You should decide on the best choice and blacken the corresponding letter on the Answer Sheet。 Passage 1 Questions 1 to 5 are based on the following ...