In a wireless power transfer arrangement (1) power is wirelessly transferred from a primary side (2) to a secondary side (3) across an airgap (8) by means of a primary resonator (6) that generates a magnetic field (9) and a secondary resonator (10) that receives the power by picking up the magnetic field (9). The secondary side (3) includes an output stage (11) that receives the AC power provided by the secondary resonator (10) and generates a DC output (13) to be provided to a load. A current sensing arrangement (18) senses the AC current flowing from the secondary resonator (10) to the output stage (11) and provides a current sense signal (16) to a power transfer controller (15) that controls the power transfer of the wireless power transfer arrangement (1) based on the current sense signal (16). And the current sense signal (16) is provided to a switching controller (20) that controls the switching of a synchronous rectifier of the output stage (11) that converts the AC power (12) provided by the secondary resonator (10) to the DC output (13).
Wireless Power Transfer Arrangement
12.11.2020
Patent
Elektronische Ressource
Englisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01F MAGNETS , Magnete / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |