1
what’s the use?
does not depend on the electric vehicle charging cable to the charge to achieve the non-contact power transmission by electromagnetic induction, electromagnetic resonance, radiofrequency like.
2
advantages
· electric vehicle wireless charging connector is not exposed, and can be adapted to a variety of harsh environments weather, avoid leakage, run electricity and other security risks. Use easy, simply parking the vehicle can be charged in a fixed position, and does not require regulation. Power supply and transformer hidden in the ground, more space-saving.
3
drawbacks
Small power only slow charge, the transmission efficiency is lower than the charging cable. · Inductive charging more stringent requirements for the location of the vehicle. · Charging higher compared to the cost of the pile, and each brand charging different standards.
4
Category
charging electric vehicles divided into two types, an electromagnetic induction and magnetic resonance type.
Application of an electromagnetic induction type currently more common form of wireless charging. The principle is the principle of electromagnetic induction, inTransmitting and receiving ends have a coil, the alternating current through the primary winding of a certain frequency, due to the electromagnetic induction in the secondary coil current is constant, so that the energy transfer from the transmitting end to the receiving end. The advantage is a higher efficiency but charge a short distance, only one charge. Magnetic resonance magnetic field resonance type wireless energy transmitted by the charging means and the energy receiving apparatus composed of two devices when adjusted to the same frequency, or at a particular resonant frequency, which can exchange energy with each other, the principle of sound the same resonance principle, arranged in the magnetic field coils of the same vibration frequency, to be powered from one another. Resonance transmission distance farther than the average induction. And a plurality of vehicles can be charged at the same time, and without precise alignment. However, its transmission energy loss is large.
5
Further reading
2013 South Korea built a wireless charging about 12 km bus lane, lane underground cables deployed by resonant charging wireless charging technology. Field
The working principle is in the form of a road surface at 20kHz, with a bus compatible with the regulator and an inverter, thereby achieving electrical power generation.