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BRUSA picks up awards at eCarTec Munich 2013 for wireless charging and electric truck; synchronous motor shortlisted

The two components of BRUSA’s Inductive Charging System. Click to enlarge.

BRUSA won two of the eCarTec Awards presented at eCarTec Munich 2013 trade fair. BRUSA’s new ICS inductive charging system and the E-FORCE electric truck won in their particular categories, while BRUSA’s synchronous motor was shortlisted in the category of “Drive Technology, System Electrics, Testing Systems”.

BRUSA Inductive Charging System. BRUSA’s ICS was the winner in the category “Energy, Infrastructure, Connection Technology”. The new system only comprises a floor and vehicle plate—the required power electronics are integrated.

Other eCarTec 2013 winners
  • Volkswagen e-up! in the category “Electric Vehicle: Car”

  • Micromax - Rinspeed in the category “Product Concept/Vision”

  • Webasto Thermo & Comfort SE HVH high voltage heater in the category “Drive Technology, Electrical System, Test Systems”

  • RWTH Aachen—Active Crash, modular battery system in the e-performance project in the category “Memory Technology, System Integration”

  • IPT Charge - Conductix-Wampfler GmbH in the special category “Sustainable Mobility Concepts”

Current inductive charging systems comprise two current coils: a primary coil located on the floor or, potentially, embedded in the road, and a secondary coil on the underside of the vehicle. The primary side also includes a wall box which contains the power electronics and which supplies the primary coil. Other functions are required such as for foreign object and living object detection. On the vehicle side, besides the secondary coil an additional module is also required containing a power control unit, AC/DC converter and other communication components.

With its years of experience in the area of power electronics, BRUSA integrated all the modules and functions into the coil housings—leaving the ICS with only two components.

Besides space and cost savings, this brings additional benefits such as an improvement in electromagnetic compatibility (EMC) as there is no longer any need for meters of HF cabling between the wall box and primary coil. This also makes it easy to install the floor plate in the end customer’s garage as it can simply be connected to the home’s fused power supply (230 volts/16 amps).

As the entire floor plate weighs less than 20 kg (44 lbs) the end customer can likely handle it with ease. Automakers also benefit from much shorter production and vehicle-integration times as the OEM only has to install one component into the vehicle: the fully-integrated secondary unit.

The Inductive Charging System (ICS) from BRUSA has been developed for everyday use and incorporates various safety features such as foreign-object detection and living-object detection.

The charging system activates automatically as soon as the vehicle is in the correct position, with the vehicle and floor plate communicating over the wireless LAN standard 802.11p. The floor plate also offers advanced connectivity via a PLC. The overall system is also impressive with a high efficiency level of ~92%—making it just as efficient as conductive charging systems.

E-FORCE—Electric 18-tonne truck for regional and city goods. The E-FORCE electric truck (earlier post) won in the category “Electric Vehicle: Commercial Vehicle”. With the assistance of LithiumStorage and Designwerk GmbH, the recently founded company E-FORCE ONE AG builds the electric truck and was able to acquire customers such as the brewery Feldschlösschen and the food retailer Coop which already have the first E-FORCE trucks in their fleets or will start soon. While the E-FORCE may be around twice as expensive as a conventional truck, it pays for itself quickly due to its extremely low running costs, BRUSA says.

Each new E-FORCE truck uses two BRUSA electric motors, controllers and chargers as well as a DC converter. BRUSA Elektronik AG was selected thanks to its long-standing system expertise and the associated reliability of its components.

BRUSA SSM1: Current Excited Synchronous Motor with inductive rotor power transmission. The new current excited synchronous motor from BRUSA Elektronik AG does away completely with rare earths as the magnetic field is generated electrically within the rotor.

The rotor power required to do this is not transmitted via brushes, but inductively so transmission is wear-free. Besides this raw-material independence the SSM also offers the advantage in that not only the stator but also the rotor field can be controlled, meaning the motor always operates at maximum efficiency at every operating point.



The problem of pollution from taxis in cities is essentially solved, and just needs implementing.

The Brusa charging plates installed in taxi ranks combined with the tried and tested BYD EV taxis, which are typically doing 3-400 miles a day in service in places like Hong Kong using regular fast charging can do the job.

The iron phosphate batteries used in the BYD are robust enough to stand the repeated fast charge, even in hot climates, unlike the Leaf's manganese spinel batteries, whose smaller pack anyway gives a lower range before charging is needed.


When will NYC get its 20,000 e-taxis?

Wireless charging may very well be the favored charging technology in the near future.


At a mere 230 VAC / 16 A, you're not going to fast-charge a taxi; it's going to need to spend as much time on the charger as in motion, if not more.  What's needed is something on the order of Tesla's Supercharger, and that's going to be wired-only.  Fortunately, it's not overly difficult.


Wireless charging for heavy users like taxis could be increase 4 to 6 folds with improved single units or by using 4 to 5 units (from bumper to bumper). Today's limits will be short lived?

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