Talking about the Matching of Locomotives in Pure Electric Vehicles

What is a motorcycle match? Simply speaking, it is the matching of the power source, the transmission system and the whole vehicle. In the pure electric vehicle, it is the matching of the motor (machine), the transmission (the vehicle), and the entire vehicle (vehicle).

In the front, we talked about the matching of the locomotives of the fuel vehicles. Next, we continue to talk about the matching of the locomotives of pure electric vehicles. Some secrets are involved. The figures in the figure below are slightly modified and do not correspond to actual models. The same is matched with power, economy, and comfort. First, we consider power. In the following figure, we can intuitively see that the maximum power corresponding to different grades corresponds to a speed of 45 and 190 kilometers per hour on a 45% slope and on a horizontal road with the same power of 80 KW. Therefore, for the constant power range of the motor, at least the maximum power can meet 55 kilometers per hour, so the maximum speed ratio will be born, if only the reducer, then the first reference of the fixed speed ratio will appear, and the maximum speed of 190 kilometers, Need to consider the limit speed of the motor. Multi-range transmission, you can consider according to the efficiency of the motor range, reasonable use of speed ratio adjustment to choose the appropriate maximum speed ratio or second high speed ratio.

Neglecting the transmission efficiency and the efficiency of the motor, in the constant power range, a slope of 30% will naturally increase the vehicle speed, but the rotation speed of the motor must be considered. Multi-speed automatic transmission, appropriately based on the number of gears, the 2 speed ratio is designed to meet the slope of 30% or 15%, and the highest gear or can be considered for use in taxiing or downhill, that is, then The overdrive used by the ca.