Apparatus and method for inductive heating
First Claim
1. An inductive heat source, comprising:
- a controller generating a control voltage in response to a power setting, the control voltage having a variable frequency and a variable duty cycle, the variable duty cycle decreasing in response to an increase in the variable frequency, a resonant converter generating an output power between a first node and a second node in response to the control voltage; and
an induction coil coupled between the first node and the second node, the induction coil producing an amount of heat depending upon a value of the output power.
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Abstract
An induction heating method and device comprise an inductive heat source (120) having a controller (130), a resonant converter (125) and an induction coil (80). The controller (130) generates a variable frequency variable duty cycle control voltage in response to a power setting. The variable duty cycle of the control voltage decreases in response to an increase in the variable frequency of the control voltage. In response to the control voltage, the resonant power converter (125) generates an output between a first node (126) and a second node (128). Coupled between the first and second nodes (126, 128), the induction coil (80) varies the amount of heat it produces in response to the output power.
12 Citations
2 Claims
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1. An inductive heat source, comprising:
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a controller generating a control voltage in response to a power setting, the control voltage having a variable frequency and a variable duty cycle, the variable duty cycle decreasing in response to an increase in the variable frequency, a resonant converter generating an output power between a first node and a second node in response to the control voltage; and
an induction coil coupled between the first node and the second node, the induction coil producing an amount of heat depending upon a value of the output power.
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2. A method of inductive heating, comprising:
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generating a control voltage in response to a power setting, the control voltage having a variable frequency and a variable duty cycle, the variable duty cycle decreasing in response to an increase in the variable frequency;
generating an output power in response to the control voltage; and
producing an amount of heat depending upon a value of the output power.
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Specification
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- Resources
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Current AssigneeElectric Power Research Institute Incorporated
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Original AssigneeJih-Sheng Lai, Nicholas Bassill
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InventorsLai, Jih-Sheng, Bassill, Nicholas
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current219/661
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CPC Class CodesH05B 6/04 Sources of currentH05B 6/062 for cooking plates or the like
