US 12,306,218 B2
Magnetic-field-based current measuring device and method for magnetic-field-based measurement of electric currents
Stephan Leisenheimer, Oberhaching (DE); and Richard Heinz, Munich (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Mar. 14, 2023, as Appl. No. 18/183,706.
Claims priority of application No. 102022202940.2 (DE), filed on Mar. 24, 2022.
Prior Publication US 2023/0305042 A1, Sep. 28, 2023
Int. Cl. G01R 19/00 (2006.01); G01R 15/20 (2006.01)
CPC G01R 19/0092 (2013.01) [G01R 15/202 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic-field-based current measuring device comprising:
an at least two-dimensionally measuring magnetic field sensor mounted at a node at which a first electrical conductor, a second electrical conductor, and a third electrical conductor, each coming from different directions, are brought together,
wherein the magnetic field sensor is configured to determine in each case one or more of a magnitude or a direction of magnetic fields which are respectively generated in the first electrical conductor, the second electrical conductor, and the third electrical conductor and meet at the node, and
wherein the magnetic field sensor is configured to derive, based on the determined one or more of the magnitude or direction of magnetic fields, information about one or more of a magnitude of individual electric currents flowing at the node or a direction of the individual electric currents flowing at the node; and
an electric motor and four switching elements, which together with the electric motor are interconnected in an H-bridge circuit,
wherein the first electrical conductor is connected to a first switching element,
wherein the second electrical conductor is connected to a second switching element, and
wherein the third electrical conductor is connected to a voltage supply.