Resonant inverter with a common mode choke
The present disclosure is directed to an electrosurgical generator including a tank configured to output energy and an H-bridge configured to drive the tank. The generator also includes a choke. The choke impedes a common mode current generated by the H-bridge and provides a leakage inductance for the tank.
1. An electrosurgical generator comprising:
a tank configured to output energy;
an H-bridge configured to drive the tank; and
a choke configured to impede a common mode current generated by the H-bridge and provide a leakage inductance for the tank, the choke comprising:
a first core half having a first central member;
a second core half having a second central member;
a first bobbin disposed about the first central member;
a second bobbin disposed about the second central member;
a primary winding disposed about the first bobbin; and
a secondary winding disposed about the second bobbin.
2. The electrosurgical generator of claim 1 , wherein the primary winding includes 10 to 15 turns.
3. The electrosurgical generator of claim 1 , wherein the secondary winding includes 10 to 15 turns.
4. The electrosurgical generator of claim 1 , wherein the primary winding is wound in a first direction.
5. The electrosurgical generator of claim 4 , wherein the secondary winding is wound in a second direction opposite the first direction of the primary winding.
6. The electrosurgical generator of claim 1 , wherein a distance between the primary winding and the secondary winding determines the leakage inductance of the choke.
7. The electrosurgical generator of claim 6 , wherein the distance between the primary winding and the secondary winding is adjustable.
8. The electrosurgical generator of claim 7 , wherein the distance between the primary winding and the secondary winding is adjustable by moving the first bobbin relative to the second bobbin.