Abstract:
An inductive power transfer system, in particular a battery charging system comprises: • a transmitter coil (3) and a receiver coil (4); • a transmitter-side power converter (8) comprising a mains rectifier stage (11) powering a transmitter-side dc-bus (10) and controlling a transmitter-side dc-bus voltage U 1,dc ; • a transmitter-side inverter stage (9) with switching frequency f sw supplying the transmitter (3) coil with an alternating current; • a receiver-side power converter (12) comprising a receiver-side rectifier stage (13) rectifying a voltage induced in the receiver coil (4) and powering a receiver-side dc-bus (14) and a receiver-side charging converter (15) controlling a receiver-side dc-bus voltage U 2,dc ; • power controllers (19, 18) determining, from a power transfer efficiency of the power transfer, reference values U 1,dc *, U 2,dc * for the transmitter and receiver side dc-bus voltages; • an inverter stage switching controller (20) controlling the switching frequency f sw to reduce losses in the transmitter-side inverter stage (9).
Abstract:
The present invention is concerned with an inductive power transfer system for providing power to a gate drive on medium or high electrical potential. The inductive power transfer System has a first spiral coil (11) having a front side facing an axially displaced second coil (12) magnetically coupled to the first coil. Inner or central turns of the first coil are arranged in and define a first coil plane (110), while outer turns of the first coil extend axially out of the first coil plane and are bent away from the second coil. The geometric field grading achieved by this arrangement decreases a maximum electric field strength at the surface of the coil conductors, and thus simplifies the insulation tasks.
Abstract:
Die Erfindung betrifft eine Energieversorgungseinrichtung für explosionsgeschützte elektronische Funktionseinheiten, bei der die Funktionseinheiten aus einer hochfrequenten Wechselspannung gespeist werden, die für jede der Funktionseinheiten individuell über eine Drossel ausgekoppelt wird. Um mit geringem Aufwand eine Vielzahl von Funktionseinheiten zu speisen, wird vorgeschlagen, die Mehrebenenleiterplatte (3) jeder Drossel (1) parallel zur Ebene ihrer Leiterbahnen (2) vollflächig mit einer flachen Platte (5) eines magnetischen Materials zu bedecken.
Abstract:
The present invention is concerned with an improved electrical insulation of an Inductive Power Transfer (IPT) system. According to the invention, a flat, two-dimensional conductor trace of a first coil of the IPT system is bent or shaped in a third dimension perpendicular to a coil plane encompassing the turns of the first coil, such that the edges of the conductor point away from a second, opposite coil of the IPT system. A geometric field grading achieved by such a conductor shape moves a direction and location of the electric field peaks occurring at the conductor edges away from the opposite coil of the IPT, and thus simplifies inter-coil insulation tasks.
Abstract:
Die Erfindung betrifft eine Energieversorgungseinrichtung für explosionsgeschützte elektronische Funktionseinheiten, bei der die Funktionseinheiten aus einer hochfrequenten Wechselspannung gespeist werden, die für jede der Funktionseinheiten individuell über eine Drossel ausgekoppelt wird. Um mit geringem Aufwand eine Vielzahl von Funktionseinheiten zu speisen, wird vorgeschlagen, die Mehrebenenleiterplatte (3) jeder Drossel (1) parallel zur Ebene ihrer Leiterbahnen (2) zumindest teilweise mit einer flachen Platte (5) eines magnetischen Materials zu bedecken.