What is direct drive and what are it's main advantages?

If we have an electric motor which is powerful and light enough, we can integrate it directly in the wheel of the vehicle. We call those electro motors also "in wheel" motors. Aside from steering mechanisms, the wheel will be the only moving part of propulsion system. No transmisions or gears are needed. Direct drive (DD) can be used from bicycles to motorcycles and electric cars. In the case of car, we can have motor in each wheel. In bicycles, mopeds or motorcycles one is enough. Let us look at benefits of DD propulsion systems.

+ We get rid of all mechanical transmissions.
+ We lower the weight of vehicle.
+ We improve safety with usage of intelligent electronics, that drive each wheel separately
+ 4 wheel drive is obvious, ABS and ASR systems are easily integrated.
+ We improve durability, no maintenance of transmission or internal combustion engine is required.
+ Solution is ecologically better, because we need less material and no polluting gases are emitted.
+ It offers possibility of sideways driving (for better parking options) and turning on the spot.
+ It also opens alternative design solutions.

Direct drive offers sideways driving (for parking!) and greater maneuverability



Scheme of energy flow in DD propulsion system using hybrid power source with fuel cell and battery

No transmisions or gears are needed and efficiency of propulsion system is improved.

More questions and answer will be prepared soon. At the moment they are only in slovene language.