Full electric drive system

Full electric drive systems are split over an electric energy storage unit and one or more electric drives. Combustion engine, tank and gearbox can be completely dispensed with. This means that fully electric systems are easy to integrate and low in maintenance. The battery is charged via a charging device and electric socket. The special feature that full electric systems share with hybrid systemsis recuperation. This means that during braking energy is recovered and feed back into the battery.

The main advantage is the extremely high efficiency even in partial load. When interacting with modern inverters efficiency of up to 95% is possible. The most efficient and quiet drive systems today are fully electric.

Ideal areas of application are commercial vehicles such as public transit busses or delivery vehicles in inner cities. These vehicles have an extremely variable load profile with many acceleration and braking sequences and a predictable maximum range.

Advantages

  • extremely high efficiency
  • zero emissions
  • very quiet during operation
  • recuperation
  • long lifetimes
  • less maintenance

Protection of the battery


 

A smart DC/DC converter effectively protects expensive system components from overvoltages and voltage ripples

 

Minimisation of noise


 

Smaller combustion engines and quiet electric motors reduce noise emission and when needed ensure near to silent operation

 



Hybrid drive systems

Hybrid drive systems comprise a generator with combustion engine, one or more electric drives and an additional electric energy storage unit. According to the design we differentiate between a parallel or serial hybrid drive. With parallel systems the combustion engine can also support thetraction drive with mechanical energy. With serial systems the combustion engine is decoupled as in diesel-electric systems. The combustion engine functions only as a generator.

The main advantage is the possible maximisation of the operating time of the combustion engine as the most efficient operating point and therefore the increase in efficiency of the total system by up to 30%. In partial load the electric motor with the better efficiency takes over.

The most common applications are those with load profiles that vary greatly, for instance refuse collection vehicles or public transit busses in inner cities which have many acceleration and braking sequences.

Advantages

  • up to 30% more efficient
  • up to 80% of the braking energy is recuperated
  • better total efficiency
  • easier connection of electric auxiliary drives
  • short distances can be accomplished with the electric drive

Downsizing


 

Optimized hybridization means that the combustion engine in a vehicle can be considerably reduced. An additional electric motor and electric storage ensure peak power

 

Boost - Funktion


 

More power on request. Smart energy management and an optimized hybridization ensure the required extra boost

 



Diesel-electric drive system

Diesel-electric drive systems consist of one or more generators with combustion engine for creating electric energy and one or more electric consumers – usually several electric motors.

Unlike pure diesel drives diesel-electric drive solutions are mechanically decoupled and unlike hybrid solutions diesel-electric applications do not have an electric energy storage unit for the recuperated energy.The main advantage is the avoidance of complicated baffles and distribution of the mechanical movement to the actual drives. This makes sense if there are many drives with different power requirements.

The most common applications are diesel-electric locomotives, ships and very large trucks such as dumper trucks with payloads of up to 360 tonnes. As electric drive systems become more and more common in commercial vehicles diesel-hydraulic systems in construction machines will also be electrified and will thus achieve a much higher degree of efficiency.

Advantages

  • less danger when defect
  • connection of electric devices
  • simple design, better maintenance
  • flexible load distribution in the system
  • better efficiency

Long working life


 

If individual drive system components are designed for optimized hybridization with fewer load changes for the components this considerably increases the lifetime

 

Minimal CO² emission


 

Smaller combustion engines and quiet electric motors reduce noise emission and when needed ensure near to silent operation