In the era of new energy, power consumption and battery life have become indicators for manufacturers to demonstrate their strength.
Fuel vehicles are less likely to have range anxiety due to the advantages of high energy density and fast recharging speed of fossil fuels, and they are matched with a suitable size of fuel tank. In the new energy era, the energy density of batteries is much lower than that of fossil fuels, and they are limited by size and weight. People generally have “range anxiety” and “recharging anxiety” about new energy vehicles.
Like fuel vehicles, energy conservation in new energy vehicles is also a systematic project. In addition to optimizing the power form and improving the thermal efficiency of the engine, new energy vehicles have more invisible energy-saving methods. In the final analysis, it is necessary to increase revenue and reduce expenditure. Today we will look at the selection and application of motors.
Improving energy efficiency means making the best use of everything. In new energy vehicles, heat is the most valuable. The needs of each subsystem of the vehicle should be clarified. If there is heat demand or excess heat in the subsystem, the heat energy can be transferred or extracted and managed through the thermal management system, which can effectively improve the efficiency of use. For example, the coolant after the motor is cooled is used to heat the cabin and battery. In many applications, the heat generated by the motor is always disliked, but it is well used in cars.
Different motors have different working efficiencies. Currently, pure electric vehicles mainly use two types of motors, namely permanent magnet synchronous motors and induction motors. Permanent magnet synchronous motors are small in size, light in weight, have high power density, and low comprehensive energy consumption. Their overall efficiency is generally higher than that of induction motors. Using permanent magnet synchronous motors can reduce energy consumption.
Induction motors also have advantages. When permanent magnet synchronous motors do not output power, permanent magnets will generate reverse drag and form resistance. However, when induction motors are not powered, there is almost no reverse drag. The combination of the two can not only meet the power demand, but also reduce energy consumption.
Therefore, the quality of the motor is closely related to the actual operating conditions, and the tendency guarantee of the motor performance is also an issue that must be paid attention to in practical applications.
Post time: Nov-04-2024