US 12,424,938 B2
Method and circuit for current control
Uwe Zimmermann, Lichtenstein / OT Roedlitz (DE)
Assigned to AT-TRONIC GmbH, Lichtenstein / OT Roedlitz (DE)
Appl. No. 18/881,037
Filed by AT-TRONIC GMBH, Lichtenstein / OT Roedlitz (DE)
PCT Filed Jul. 5, 2023, PCT No. PCT/IB2023/056950
§ 371(c)(1), (2) Date Jan. 3, 2025,
PCT Pub. No. WO2024/009230, PCT Pub. Date Jan. 11, 2024.
Claims priority of application No. 10 2022 116 806.9 (DE), filed on Jul. 6, 2022.
Prior Publication US 2025/0260318 A1, Aug. 14, 2025
Int. Cl. H02M 3/155 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/155 (2013.01) [H02M 1/0009 (2021.05)] 15 Claims
OG exemplary drawing
 
1. A method for current control, the method comprising:
providing a circuit with at least one of a first load or generator component and with at least one of a second load or generator component, between which a current can flow in a first current direction or in a second current direction, and with two transistor switches connected in series between the at least one of the first load or generator component and the at least one of the second load or generator component, wherein source or emitter terminals of the transistor switches are electrically short-circuited, and wherein gate voltages at gate terminals of the transistor switches are set by first and second analog transistor controllers respectively associated with the transistor switches, to thus control an actual current by the transistor switches;
measuring the actual current with a current measuring device between the transistor switches and transferring the measured actual current to the transistor controllers, by forwarding the actual current or an amplified value of the actual current to the first transistor controller as a first input signal of the first transistor controller and by forwarding an inverted value thereof to the second transistor controller as a first input signal of the second transistor controller;
providing each of the transistor controllers with a first target current for the first current direction and a second target current for the second current direction by a digital controller; and
setting by the transistor controllers corresponding gate voltages for the transistor switches in dependence on a difference between the actual current and the respective target current, to thereby control the actual current by the transistor switches.