Electric drive system, including electric motor, motor controller, and transmission mechanism. Some electric vehicles can be directly driven by an electric motor to drive the wheels. Electric vehicle electric drive methods can basically be divided into two types: electric central drive and electric wheel drive
Characteristics of electric drive system
1. High energy conversion efficiency
Electric motor is the executing component of electric drive system for external work, and its energy conversion efficiency can generally reach 75% to 90%, which is much higher than the efficiency of heat engines. Stirling engine is currently an advanced high-efficiency heat engine, and its efficiency is only about 30%. Generally, heat engines have lower energy conversion rate, so they can be driven in urban areas, The energy efficiency of electric vehicles is about 40% higher than that of regular gasoline engines... Therefore, hybrid electric vehicles are currently the darling of countries around the world
2. No pollution, zero emissions, and environmentally friendly
The development of the automotive industry has caused significant environmental pollution to human survival, especially in large cities. The exhaust gases emitted by various motor vehicles pose a serious threat to human health, especially in industrialized countries.
. The result of the operation of the electric drive system is that it will not discharge any substances, which means zero emissions and is environmentally friendly. Therefore, gradually replacing gasoline vehicles with electric vehicles is the direction of efforts for countries around the world today3. Flexible and convenient control of working status
As long as the driver gives an electrical signal command, the output power of the system and the working status of the control system can be immediately changed, without distance restrictions and without intermediate transmission devices, which means that the responsiveness of the electric drive system is very good.
4. The working state of the system will not be affected by the external environment.
When using a thermal engine as the power source, oxidant (or air) must be present to ensure the normal operation of the system. Therefore, when used as an underwater propulsion power source, a thermal engine cannot be used. For example, submarines must use batteries for power supply during underwater navigation
5. The overall weight remains unchanged
The electric drive system does not discharge any waste during operation, so its total weight remains unchanged.
. This feature is very important for submarines and torpedoes working underwater, as it will not affect the overall buoyancy of submarines and torpedoes6. No noise, no impact on the environment
Due to the absence of mechanical transmission devices, the electric drive system does not generate noise during operation, making it particularly suitable for electric vehicles in cities and some special purpose equipment.
7. Good safety
Whether on land or underwater, the safety of the propulsion power system is a key factor in its adoption.
. Although some batteries have a high energy density, they are ultimately forced to be phased out due to inadequate safetyFunction of testing report:
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