New energy electric vehicle technology
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Foreign development status In recent decades, developed countries have invested a lot of human and financial resources in the development of electric vehicles, and various related technologies of electric vehicles have also made significant progress. Since the United States formulated the electric vehicle research plan in 1976, general motors and Ford have invested a lot…
Pure electric vehicles refer to vehicles that use only batteries as power sources. It uses the electric energy stored in the battery to provide electric energy to the motor and drive the motor to run, so as to push the car forward. The electric motor of pure electric vehicle is equivalent to the engine of…
By using high-energy permanent magnet as excitation mechanism, permanent magnet motor drive has the potential to be designed as a motor with high power density, high speed and high efficiency. These significant advantages make its application in electric vehicles (EV) and hybrid electric vehicles (HEV) remarkable. In the series of permanent magnet motors, brushless DC…
Read More “Basic principle, performance and advantages of permanent magnet brushless DC motor” »
DC motor is a motor that converts DC electric energy into mechanical energy. The stator of the motor provides magnetic field, the DC power supply provides current to the winding of the rotor, and the commutator keeps the direction of the rotor current and the torque generated by the magnetic field unchanged. Its features are…
1.1 power electronics for electric vehicles In the past few decades, power semiconductor device technology has made great progress. These power devices have made revolutionary progress in power rating and performance. Among the existing power devices, the power diode is used as a free switch, while other power devices, such as thyristor, GTO, BJT, MOSFET,…
Whether pure electric vehicle or hybrid electric vehicle, motor drive system is an important part of its power system. The task of the motor drive system is to efficiently convert the energy of the battery into the kinetic energy of the whole vehicle under the control of the driver, or feed back the kinetic energy…
Advantages of hybrid energy storage system In recent years, energy has become one of the major issues facing the whole mankind. With the continuous development of new energy, how to make more effective use of existing energy has been paid more and more attention. The storage and form conversion of electric energy has become a…
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Storing energy in a rotating flywheel, that is, storing energy in the form of mechanical energy, is a very old energy storage idea. As a simple mechanical energy storage element, it has been used by human beings for thousands of years. The flywheel was used in the making machinery of zhandai Potter, the ancient spinning…
Read More “Characteristics and working principle of ultra high speed flywheel” »
Characteristics and advantages of supercapacitor The supercapacitor stores energy in the separated charge. The larger the area used to store the charge, the denser the separated charge, and the greater its capacitance. The area of the traditional capacitor is the flat area of the conductor. In order to obtain large capacity, the conductor material is…
Super capacitor: also known as electrical double layer capacitor, electrochemical capacitor (EC), gold capacitor, farad capacitor, etc. The energy storage mechanism of supercapacitor was discovered by Helmholz in 1879. In 1947, Graham et al. First began to study the electrocapillary phenomenon of mercury. In 1957, Becker first proposed that smaller capacitors can be used as…
