The technology behind primove
Based on the principle of inductive power transfer, PRIMOVE technology allows energy to be wirelessly transmitted between components buried underground and receiving equipment installed beneath the vehicle.
The inductive principle functions as follows: an electric conductor creates a magnetic field, which generates an electric current in another conductor placed within that field. When applied in conjunction with the PRIMOVE system, this electric current generates energy that is then used to propel vehicles forward in a clean, efficient way.
In order to power vehicles through inductive power transfer, an induction coil under the road or track carries high-frequency alternating current (AC), thereby creating a magnetic field. This field induces a voltage in the vehicle-side inductive power receiver (pick-up), which is used to charge and power the vehicle. Wayside components “communicate” with the vehicle to ensure that charging segments are only switched on when the vehicle is positioned directly above them.
This principle is used in a huge range of applications from electric toothbrushes that charge inductively when placed on their base to electric generators in power plants.
The charging process
When charging statically, the electric vehicle simply drives to a charging point; once the vehicle is positioned over the charging segment, energy transfer can begin. The PRIMOVE system allows for energy transfer at high levels, minimising both charging time and frequency. The driver does not have to follow any special procedure, nor does he require extra qualifications or training to operate the system. Furthermore, there is never any physical contact with electricity, ensuring that the charging process is both safe and driver-friendly.
When charging dynamically (in motion), the rail or road vehicle recharges by driving over the inductive segments. These are automatically switched on as the vehicle is activated by the wayside detection system.
Introducing high power opportunity charging
Range and recharging constraints are the key concerns when it comes to converting an entire delivery fleet or bus network to electric power. In order to address these issues while offering a solution that is light, easy to integrate and competitive, the PRIMOVE system combines a charging pattern at regular intervals with energy transfer at high power levels. The charging process is seamlessly integrated into existing operations, thereby ensuring uninterrupted service without any need for additional fleet vehicles or batteries.
A precise energy flow simulation helps define the optimal infrastructure to maximize efficiency while keeping charging frequency (and infrastructure) to a minimum. It defines the ideal positioning of charging points that match the existing route so that the vehicle never has to change its course or extend dwell time to recharge.
Charging segments are integrated at every tram stop and the subsequent few metres to enable recharging while letting passengers on/off and during acceleration.
Charging stations are positioned in the depot and/or en route at bus stops for recharging while letting passengers on/off without extended dwell times.
Charging stations are installed at strategic points (e.g. loading docks for delivery vans, taxi ranks in airport waiting areas, supermarket parking spaces) to allow fast charging at convenient times when the vehicle is periodically not in use.