Electronic protection circuit
AssigneeTechniks, LLC
InventorScott Worthington
Life of this patent
Estimating the term…
Abstract
A controller is connected to at least one transistor of the transistor driving circuit and connected to the at least one current sensing element to detect the current through the induction heating coil and in response to the current through the at least one current sensing coil exceeding a limit level sending a control signal to the at least one transistor of the transistor driving circuit to temporarily turn off the at least one transistor.
Claims20
An electric circuit for an induction heat machine for shrink fit tool holders, the electric circuit comprising:
- a rectified power source;
- a transistor driving circuit electrically connected to the rectified power source;
- a tank capacitor connected to the transistor driving circuit;
- an induction heating coil connected in series with the tank capacitor and connected to the transistor driving circuit;
- at least one sensor connected perpendicularly across an electrical connection of the rectified power source and the transistor driving circuit and electrically isolated therefrom;
- and
- a controller connected to at least one transistor of the transistor driving circuit and connected to the at least one sensor to detect a current through the induction heating coil, and in response to the current through the at least one sensor exceeding a current limit level sending a control signal to the at least one transistor of the transistor driving circuit to temporarily turn off the at least one transistor.
A method of controlling an induction heat machine for a shrink fit tool holder, the method comprising:
- providing a rectified power source;
- providing a transistor driving circuit electrically connected to the rectified power source;
- providing a tank capacitor connected to the transistor driving circuit;
- providing an induction heating coil connected in series with the tank capacitor and connected to the transistor driving circuit;
- sensing with at least one current sensing coil connected perpendicularly across an electrical connection of the rectified power source and the transistor driving circuit and electrically isolated therefrom;
- and
- sending a control signal from a controller to the at least one transistor of the transistor driving circuit to temporarily turn off the at least one transistor in response to a current through the at least one current sensing element exceeding a current limit level.
Dependencies are inferred from the claim text.