METHOD FOR OPERATING AN LLC RESONANT CONVERTER FOR A LIGHT-EMITTING MEANS, CONVERTER, AND LED CONVERTER DEVICE
First Claim
1. A method for operating an LLC resonant converter (19;
-
79) for a light-emitting means (3;
5;
50), wherein the LLC resonant converter (19;
79) has a primary-side circuit (20;
80), which comprises a half-bridge (21, 22) and an LLC resonant circuit (25-27), and a secondary side (13;
30) galvanically isolated therefrom, the method comprising;
controlling the half-bridge (21, 22) by clocked switching of switches (21, 22) of the half-bridge,detecting a load (3;
5;
50), to which energy is supplied from an output (35) of the secondary side (13;
30), based on a measured variable (iavg) detected in the primary-side circuit (20;
80), andadapting the control of the half-bridge (21, 22) on the basis of the measured variable (iavg) detected in the primary-side circuit (20;
80).
1 Assignment
0 Petitions
Accused Products
Abstract
An LLC resonant transformer (19) for a lamp (5) comprises a primary circuit (19) and a secondary side (30) galvanically isolated therefrom. During operation of the LLC resonant transformer (19), a first switch (21) and a second switch (22) of a half-bridge to which an LLC resonant circuit (25-27) of the primary circuit (19) is connected are actuated in a clocked fashion. A load (5) to which an output (35) on the secondary side (30) supplies energy is detected on the basis of a measured variable (iavg) acquired in the primary circuit (20). The half-bridge (21, 22) is variably controlled on the basis of the measured variable (iavg) that is acquired in the primary circuit (20) and indicates the load (5).
-
Citations
17 Claims
-
1. A method for operating an LLC resonant converter (19;
-
79) for a light-emitting means (3;
5;
50), wherein the LLC resonant converter (19;
79) has a primary-side circuit (20;
80), which comprises a half-bridge (21, 22) and an LLC resonant circuit (25-27), and a secondary side (13;
30) galvanically isolated therefrom, the method comprising;controlling the half-bridge (21, 22) by clocked switching of switches (21, 22) of the half-bridge, detecting a load (3;
5;
50), to which energy is supplied from an output (35) of the secondary side (13;
30), based on a measured variable (iavg) detected in the primary-side circuit (20;
80), andadapting the control of the half-bridge (21, 22) on the basis of the measured variable (iavg) detected in the primary-side circuit (20;
80). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16)
-
79) for a light-emitting means (3;
-
12. A converter for a light-emitting means, comprising:
-
a primary-side circuit (20;
80) having a half-bridge (21, 22) and having an LLC resonant circuit (25-27),a secondary side (13;
30), which is galvanically isolated from the primary-side circuit (20;
80) and which has an output (35) for supplying energy to the light-emitting means, anda control device (14) for controlling the half-bridge (21, 22), wherein the control device is configured to detect a load (3;
5;
50) at the output (35) of the secondary side (13;
30) depending on a measured variable (iavg) detected in the primary-side circuit (20;
80) and to control the half-bridge (21, 22) in dependence thereon. - View Dependent Claims (13, 14, 15, 17)
-
Specification