Electromagnetic cooking appliance and method for controlling power of the same
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electromagnetic cooking appliances intermittently heat at low power, causing interference with the power grid through harmonic current and voltage flicker.
Innovation Solution
A method for controlling the power of electromagnetic cooking appliances by using multiple coil disks with independent resonance circuits, alternating heating periods, and switching between different power levels to reduce harmonic current and voltage flicker, implemented through a processor-controlled system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electromagnetic cooking appliance heats intermittently at low power, then energy consumption is reduced, but harmonic current and voltage flicker interference increases
Solution Approach 1:
The patent divides the heating function into multiple independent coil disks (first coil disk and second coil disk), each with its own independent resonance circuit. This segmentation allows alternating activation of different coils, where one coil is activated while another is deactivated, thereby distributing the harmonic current generation over time and reducing overall interference with the power grid while maintaining continuous heating capability.
Solution Approach 2:
The patent implements periodic alternating heating by switching between the first and second coil disks in different time periods. The control method activates the first coil disk in a first time period, then activates the second coil disk in a second time period, creating a periodic heating pattern that reduces continuous harmonic current generation and voltage flicker while maintaining average power output.
2Object-generated harmful factors
If multiple coil disks with independent resonance circuits are used with alternating heating periods, then harmonic current and voltage flicker interference is reduced, but device complexity increases
Solution Approach 1:
The patent divides the heating function into multiple independent coil disks (first coil disk and second coil disk), each with its own independent resonance circuit. This segmentation allows alternating activation of different coils, where one coil is activated while another is deactivated, thereby distributing the harmonic current generation over time and reducing overall interference with the power grid while maintaining continuous heating capability.
Solution Approach 2:
The patent combines multiple coil disks with independent resonance circuits into a single integrated electromagnetic cooking appliance system. By merging these components and implementing unified control logic that alternates between them, the system achieves reduced harmonic current and voltage flicker interference while managing the inherent complexity through integrated design.
3Productivity
If high-speed switching between multiple coil disks is implemented, then different power levels are achieved, but control system complexity increases
Solution Approach 1:
The patent implements periodic alternating heating by switching between the first and second coil disks in different time periods. The control method activates the first coil disk in a first time period, then activates the second coil disk in a second time period, creating a periodic heating pattern that reduces continuous harmonic current generation and voltage flicker while maintaining average power output.
Solution Approach 2:
The patent implements dynamic control of the electromagnetic cooking appliance by enabling high-speed switching between the first and second coil disks. The control system dynamically adjusts which coil is active based on desired power levels and heating requirements, allowing flexible power adjustment while managing complexity through coordinated control of the independent resonance circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-speed switching of heating on multiple coil disks to achieve different power levels, effectively reducing harmonic current and voltage flicker interference with the power grid.
Implementation Method 1
Each of the first coil disk and the second coil disk corresponds to an independent resonance circuit
Implementation Method 2
Each of the first coil disk and the second coil disk corresponds to an independent resonance circuit
Implementation Method 3
controlling the first coil disk to heat in the first heating time period, and controlling the second coil disk to heat in the second heating time period
Data Source
AI summary
The present disclosure provides a method for controlling a power of an electromagnetic cooking appliance and an electromagnetic cooking appliance. The electromagnetic cooking appliance includes a first coil disk and a second coil disk. Each of the first coil disk and the second coil disk corresponds to an independent resonance circuit. After obtaining a target power of the electromagnetic cooking appliance, a heating period of the electromagnetic cooking appliance is determined based on the target power, each heating period including at least one first heating time period and at least one second heating time period. The first coil disk is controlled to heat in the first heating time period, and the second coil disk to heat in the second heating time period, such that the first coil disk and the second coil disk are heated alternately to reduce an interference of harmonic current and voltage flicker.