System for reducing noise from a thermocouple in an induction heating system
AssigneeIllinois Tool Works Inc.
InventorPaul D. Verhagen
Life of this patent
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Abstract
A method and apparatus for reducing electrical noise in an electrical signal from a temperature feedback device to an induction heating system. The induction heating system has an electrical connector that is adapted to electrically couple a temperature feedback device to a system controller and to ground via a capacitor circuit. The capacitor circuit shunts electrical noise to ground but allows a temperature signal from the temperature feedback device to be received by the system controller. A shielded extension cable to electrically couple the temperature feedback device to an induction heating system may be used. The shielding of the extension cable is electrically coupled to ground.
Claims19
An induction heating system, comprising:
- a power source;
- an induction heating device that is electrically coupleable to the power source to produce a varying magnetic field;
- a control circuit operable to control the application of electrical power from the power source to the induction heating device;
- a temperature feedback device having a plurality of conductors;
- and
- an interface operable to electrically couple the plurality of conductors to the control circuit and to ground through at least one capacitor.
An induction heating system, comprising:
- a power source;
- an induction heating device that is electrically coupleable to the power source to produce a varying magnetic field;
- a temperature feedback device;
- an extension cable for the temperature feedback device, the extension cable having conductive shielding;
- and
- an interface operable to electrically couple the conductive shielding to ground.
A method of reducing electrical noise from a temperature signal received by an induction heating system from a temperature feedback device, comprising:
- providing the induction heating system with an interface having a capacitive circuit coupled to ground;
- and
- establishing the capacitance of the capacitive circuit to shunt electrical noise to ground.
A method of reducing electrical noise from an electrical signal produced by a temperature feedback device, comprising:
- connecting the temperature feedback device to an induction heating system using a shielded extension cable having a plurality of conductors adapted to electrically couple the temperature feedback device to the induction heating system and a shielding conductor surrounding the plurality of conductors;
- and
- coupling the shielding conductor in the shielded extension cable to electrical ground.
A method of reducing electrical noise from a temperature signal received by an electronic circuit from a temperature feedback device, comprising:
- providing the electronic circuit with an interfere having a capacitive circuit coupled to ground;
- and
- establishing the capacitance of the capacitive circuit to shunt electrical noise produced by a magnetic field to ground.
Dependencies are inferred from the claim text.