Qualcomm Inc exhibited its wireless power transmission system for electric vehicles (EVs) at the 2012 International CES.
This is the first time that Qualcomm has showed the system at a trade show, it said. The system consists of a power source, power-transmitting pad, power-receiving pad, control unit, etc. It is the same system that will be used in the field test that the company plans to conduct by using 50 EVs in early 2012 in London, the UK.
Qualcomm employed a wireless power transmission technology called "Inductive Power Transfer (IPT)," which is based on the electromagnetic induction method. The technology was developed by HaloIPT, a spin-off from the University of Auckland in New Zealand, which Qualcomm purchased in November 2011.
The frequency range used for power transmission is 20k-140kHz. And the power to be transmitted is 3kW for single phase, 7kW for three phases and 18kW or higher in the case of rapid charging. The distance between the power-transmitting and power-receiving pads can be changed by up to 400mm.
This time, Qualcomm exhibited another power-receiving pad that is currently under development. Though the company did not disclose the specifications of the pad, it said that the new pad is smaller and lighter than the pad to be used in the field test.