Multi-Inverter Induction Cooker Synchronization for Quiet Heating
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Solution Overview
Problem
Induction heat cooking apparatuses face issues with inconsistency in operating frequencies and phases of multiple heating coils, leading to noise and output deviations, and lack a fail-safe mechanism for inverter errors.
Innovation Solution
A single controller synchronizes the operating frequencies and phases of multiple heating coils by controlling switching circuits in multiple inverters, with a fail-safe function that allows a normally operating inverter to manage an abnormal one, ensuring stable operation even if a controller fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple inverters are used to operate multiple heating coils simultaneously, then the heating capacity and power output are improved, but inconsistency in operating frequencies and phases occurs between the heating coils
Solution Approach 1:
The patent merges the control functions of multiple inverters into a single controller that manages all heating coils. This unified control approach ensures that all heating coils operate at the same frequency and phase, eliminating the inconsistency that arises when multiple independent inverters are used. The single controller coordinates the switching circuits of all inverters to maintain synchronized operation.
Solution Approach 2:
The single controller performs multiple functions: it controls the switching circuits of multiple inverters, synchronizes the operating frequencies and phases of all heating coils, and provides fail-safe monitoring for all inverter units. This multi-functional approach replaces the need for multiple independent controllers while maintaining system stability.
2Ease of operation
If multiple independent controllers are used for multiple inverters, then each inverter can operate autonomously, but noise is generated due to frequency inconsistency and output deviation occurs due to phase deviation
Solution Approach 1:
The patent combines multiple independent controllers into a single centralized controller that manages all heating coils. This unified control eliminates the frequency and phase deviations that cause noise and output inconsistency, while the controller maintains autonomous operation capabilities through coordinated switching circuit control.
3Stability of the object's composition
If a single controller manages multiple inverters, then frequency and phase consistency is improved, but the controller complexity and system control complexity increase
Solution Approach 1:
The single controller is designed with multi-functional capabilities to manage multiple inverters, synchronize frequencies and phases, and provide fail-safe monitoring. While the controller performs multiple functions, the patent simplifies the overall system architecture by eliminating the need for multiple independent controllers and their intercommunication requirements.
Solution Approach 2:
The single controller acts as an intermediary that coordinates the switching circuits of multiple inverters. It mediates between the power source and multiple heating coils, ensuring synchronized operation through centralized control of all inverter units.
4Device complexity
If traditional inverter systems are used without fail-safe mechanisms, then the device complexity is reduced, but the reliability decreases when inverter controller failures occur
Solution Approach 1:
The single controller includes fail-safe monitoring functions that detect abnormalities in inverter units before they cause system failure. When a failure is detected, the controller automatically adjusts the operation of remaining healthy inverters to maintain continuous heating, providing a cushioning effect against complete system failure.
Solution Approach 2:
The controller implements feedback mechanisms to monitor the operational status of all inverters in real-time. When abnormalities are detected, the system provides feedback to adjust the operation of remaining healthy units, ensuring continuous reliable operation. This feedback loop maintains system reliability without significantly increasing complexity.
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
This solution eliminates noise and output deviations caused by frequency and phase inconsistencies, improves the quietness and stability of the cooking apparatus, and reduces repair costs by enabling continued normal operation during inverter controller failures.
Implementation Method 1
an induction heat cooking apparatus that performs a cooking function by applying a high frequency current to a working coil or a heating coil to allow an eddy current to flow to heat a cooking container while a line of strong magnetic force generated by the high frequency current passes through the cooking container
Implementation Method 2
a current is applied to a heating coil, a cooking container which is made of a magnetic substance generates heat due to induction heating
Data Source
AI summary
The present invention relates to an induction heating cooker including a synchronization circuit for a plurality of inverters, comprising: a first inverter including a first switching circuit unit for applying a first power source to a first heating coil, and a first control unit for controlling the first switching circuit unit; and a second inverter including a second switching circuit unit for applying a second power source to a second heating coil, and a second control unit for controlling the second switching circuit unit, wherein the first inverter further includes a first insulated signal transfer unit for controlling an operation of the second switching circuit unit, and the first control unit may match an operating frequency of the second switching circuit unit with an operating frequency of the first switching circuit unit by using the first insulated signal transfer unit.