Electric vehicle

Essay学霸教员组今天给各位留学生带来一篇纯原创代写范文，讲的是电动汽车，希望这篇可以帮助到各位留学生，同时需要代写也可以直接联系我们Essay学霸客服vx（vx：ada100-1）进行咨询。

When it comes to the electrical engineering, we think a lot of things in our minds. Electrical engineering products are very common in our daily life. It is the great progress of electronic that has promoted the advent of the information age and has changed the way of human life and work. In this report, I am going to talk about electric cars.

Electric cars are also known as electric driving. It can be divided into AC electric cars and DC electric cars, which use batteries as energy sources, convert electric energy into mechanical energy movement through controllers, motors and other components to control the current and spend of cars.

The electric car is composed of the following parts, there are chargers, it is mainly used to the battery to supplement the power device; There are also batteries, which mainly provide energy for electric cars; A controller is a component used to control the speed of the motor and is also the core of the electric system of electric cars. There is a motor that can convert battery electricity into mechanical energy and other small parts.

The first electric car was built in 1881, and the inventor was Gustav Truff, a French engineer. This was a lead-acid battery powered tricycle which was driven by a DC motor. Electric cars have a history earlier than our most common internal-combustion engine-powered cars. Hungarian inventor and engineer Jedlik ányos, known as the father of the DC motor, first experimented with a mobile device for electromagnetic rotation in a lab in 1828. American Thomas Davenport built the first electric car powered by a DC motors in 1834. In 1837, Thomas received the first patent I the American electrical industry. Robert Anderson, a Scot, invented the electric carriage powered by a primary battery that can not be recharged between 1832 and 1838. In 1873, the electric car invented by the British Luobote·daiweisen with a battery as power was not included in the international confirmation. Later, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydrogen batteries, lithium-ion batteries, and fuel cells emerged as electricity. With the development of battery technology, electric cars were widely used in Europe and the United States in the late 19th century.

With the development of Texas Oil and the improvement of internal combustion engine technology, electric cars gradually lost their advantage after 1920. The automobile market has gradually taken over the automobile market for the internal combustion engine-driven cars. Only a small number of trams and trolleybuses and very limited electric cars are kept in a few cities. The development of electric cars has been stagnant for about half a century. With the oil resources flowing to the market, electric drive, battery materials, power battery, battery management and other technologies used in electric cars can not be developed or applied.

Since 1990, people have been overusing oil, leading to the decrease of oil resources, and the pollution of the atmosphere has become more and more serious, so people pay more attention to electric cars. Major car manufacturers are beginning to focus on the future of electric cars and to invest in technology.

In the field of electric cars, many technologies have been adopted. The ultimate goal of electric cars is to realize intelligent and lightweight high-tech products that integrate machinery, energy, and information technology. At present, the technology developed by electric cars mainly includes energy technology, motor and its control technology, body and chassis design, which are all indispensable parts of the development of electric cars. The most important of which are the green source ceramic brake, because ordinary brakes are not durable and easy to wear. If they are not adjusted and replaced in time, they will cause brake failure easily and cause traffic accidents. The green source ceramic brake adopts ceramic confortable material and labor-saving structure of roller, which can greatly improve the braking force, reduce the wear caused by the brake, and prolong the service life.

The battery of the first generation of electric cars is a lead-acid battery used to start an internal combustion engine. It is reliable, the raw material is relatively easy to obtain and the price is cheap. But it also has its drawbacks. For example, the energy ratio is low, the distance to travel after charging is short, the service life is short, and the cost of use is high. The second generation is alkali batteries. Its energy ratio and power are higher than those of the first generation lead-acid batteries, which greatly improves power and drive capabilities. But the price is relatively high. The third generation is a battery based on fuel, super capacity capacitors and flywheel batteries. It does not pollute the environment, has a long service life, and can be rechargeable. It is very suitable for electric cars.

The motor and its control technology are the core of electric cars work. The drive motor must have a wide range of speed regulation, small size, and small quality to ensure the good operation of the electric cars. In the electric car drive system, the car drive motor provides a control system, including the generation of signals to control the motor speed of the motor (Naito, Shotaro 1998). The permanent magnet brushless motor has a small size, low inertia, and fast reaction. It has been widely used in electric carss and gradually replaced DC.

A spokesman for General Motors said carbon prices would drive the development of alternative fuel carss (Rahim, Saqib, and ClimateWire 2010). Today, electric cars have tremendous changed. There are a variety of types that come out of it. Electric carss can include electric bicycles, electric motorcycles, electric cars, electric tricycles, fuel-powered dual-use electric carss, and so on.

Since the invention of the car in 1886, it has become an indispensable means of transportation in people's daily life. It can shorten the distance between the two places, change people's way of life, and facilitate people's travel. But in bringing the convenient and comfortable life to the human life, it also brings the inevitable negative influence. Everyone knows the faults of cars. Cars account for a quarter of greenhouse gas emissions, and cities account for half of the city's air pollution; Cars consume more oil than they produce in the United States (Sperling, Daniel 1994). For example, cars consume a lot of oil resources, emit a lot of exhaust gas, also endanger human health, and make noise and cause serious air pollution. Environmental pollution is associated with cars emissions because it is an additive in fuel (Swietlicki, Erik & et al 1996). However, in recent years, rising oil prices and increasing carbon dioxide emissions in the atmosphere have contributed to the greenhouse effect and global warming. Some sectors have carried out technological innovations in the automotive industry (Enrietti, Aldo, & P. P. Patrucco 2012). In order to green travel, reduce environmental pollution and increase the development of clean energy, the rapid development of electric cars technology has been promoted. Electric carss use electric power as a renewable resource to start a cars. They can effectively reduce noise generation and reduce the use of other resources.

Electric cars also have many advantages, such as environmental protection and convenience, is a good choice for us to travel. And the variety of products is very rich, can be selected for different types of people. Global resource shortages and climate change have caused a rethinking of a traditional personal mobility service based on combustion engines (Fabian Kley, Christian Lerch, and David Dallinger 2011). With the increasing level of environmental pollution, people's awareness of environmental protection has gradually increased and the price of oil keeps rising, people may choose another form of transportation to reduce their costs. Electric cars are a good choice, so the future development of electric carss is very good.

In 2016, the high-end electric cars brand "Senlan" was launched, and two electric carss, the Little Beast T2 /T3, also appeared in public view. Senlan is the world's high-end smart electric cars leader brand, focused on innovation, quality assurance, advanced technology. The T2 /T3 configuration is a 2160w lithium battery that can drive 200 kilometers in an ultra-long distance. The collection of 1500W high-performance vector motors and FOC magnetic field-oriented control technology can reach a maximum speed of 80 km/h, which can span 15 degrees. Slope angle, There are also EBS electronic brake technology and GPS driver alarm alert, smart APP cars condition detection and other functions.

According to the 2017 annual financial report released by the BMW Group, the BMW Group invested mainly in the core technology center in research and development last year. BMW hopes to acquire the upstream technology of battery production by mastering the core research and development and manufacturing technology, and establish a competitive advantage in the field of electric carss. The electric core is an important part of the power battery. It determines the performance, capacity, charging efficiency and service life of the power battery and plays a key role in the performance of electric carss. In the area of power transmission technology, new transmission systems have been continuously developed and improved with a view to compatibility with traditional models and new energy models. Starting in 2021, the BMW Group will use the fifth-generation powers transmission system, which is smaller than the previous system and can be flexibly applied to different models. It also reduces the number of parts and components and effectively reduces costs.

After the launch of the iPhone 8 and iPhone X, wireless charging technology began to attract market attention. In March this year, AirFuel Wireless Charging Alliance, a world-renowned wireless charging organization, hosted the first AirFuel Wireless Charging Conference and Developer Forum in China. Some high-quality American companies have also come to the scene. Technical experts have shown AirFuel's related products and future development trends from different perspectives such as technology, development, and market. Because of the advantages of faster, more free, and more compatible charging technology, it has attracted the attention of many companies. In today's world, wireless charging technology has begun to enter the field of electronic products. With the rapid growth of electric car sales, car manufacturers are focusing on simplifying the charging experience of electric cars, while WiTricity DRIVE wireless charging systems allow ground or subsurface charging pads to send energy through WiTricity-patented magnetic resonance technology to carss parked above them. There is no need to pass through cables or move parts. Some scholars believe that wireless charging is a trend of electric carss in the future.

In order to make the electric cars use longer, we need to learn some basic maintenance knowledge. When the battery is recharged, we had better insert the plug of the charger into the battery box first, and then connect the plug to the outlet of the power supply; When not charging, do not connect the charger empty for a long time on the AC power supply. The charger should avoid heat and humidity, do not let the water into the charger, in case of electric shock. Every six months, the electric bicycle should be maintained once, lubricate the transmission parts and prevent Rust, and tighten the parts. Only by protecting the electric car, its function will not be so easily damaged.

Essay学霸留学教育原创版权郑重声明：原创 代写范文源自编辑创作，未经官方许可，网站谢绝转载。对于侵权行为，未经同意的情况下，Essay学霸有权追究法律责任。主要业务有essay代写、assignment代写、paper代写、作业代写服务。

Essay学霸为留学生提供更好 的作业代写服务，亲们可以进入主页了解和获取更多代写范文提供作业代写服务，详情可以咨询我们的客服微信：ada100-1。