CONTROL UNIT OF INDUCTION HEATING UNIT, INDUCTION HEATING SYSTEM, AND METHOD OF CONTROLLING INDUCTION HEATING UNIT
First Claim
1. A control unit of an induction heating unit, in which the control unit controls an AC power output to a heating coil of a transverse type induction heating unit allowing an alternating magnetic field to intersect a sheet surface of a conductive sheet which is being conveyed to inductively heat the conductive sheet, the control unit comprising:
- a magnetic energy recovery switch which outputs the AC power to the heating coil;
a frequency setting unit which sets an output frequency in response to at least one of a relative permeability, a resistivity, and a sheet thickness of the conductive sheet; and
a gate control unit which controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.
3 Assignments
0 Petitions
Accused Products
Abstract
A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.
51 Citations
15 Claims
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1. A control unit of an induction heating unit, in which the control unit controls an AC power output to a heating coil of a transverse type induction heating unit allowing an alternating magnetic field to intersect a sheet surface of a conductive sheet which is being conveyed to inductively heat the conductive sheet, the control unit comprising:
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a magnetic energy recovery switch which outputs the AC power to the heating coil; a frequency setting unit which sets an output frequency in response to at least one of a relative permeability, a resistivity, and a sheet thickness of the conductive sheet; and a gate control unit which controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling an induction heating unit by controlling an AC power, which is output to a heating coil of a transverse type induction heating unit allowing an alternating magnetic field to intersect a sheet surface of a conductive sheet which is being conveyed to inductively heat the conductive sheet, the method comprising:
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outputting the AC power to the heating coil by a magnetic energy recovery switch; setting an output frequency in response to at least one of a relative permeability, a resistivity, and a sheet thickness of the conductive sheet; and controlling a switching operation of the magnetic energy recovery switch on the basis of the output frequency which is set. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification