Induction Heating Device Frequency Control for Power Distribution

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Solution Overview

Problem

Existing induction heating devices lack flexibility and efficiency in power distribution, leading to uneven heat generation and increased wear on components.

Innovation Solution

The induction heating device employs a control unit to operate multiple heating frequency units in separate sections, connected via induction heating units, allowing for direct and phase-delayed control, with a resonance unit and switching arrangement to optimize power distribution and reduce wear.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple heating frequency units are connected directly to multiple induction heating units, then each heating unit can operate independently, but the system lacks flexibility in power distribution and causes uneven heat generation

Engineering Contradiction:

Improveflexibility in power distributionVSAvoiduniformity of heat generation

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The control unit alternates between different operating modes in periodic cycles. In the first mode, first and second heating frequency units operate simultaneously on their respective induction heating units. In the second mode, only the first heating frequency unit operates on the first induction heating unit while the second heating frequency unit is switched off. This periodic switching enables flexible power distribution while maintaining uniform heat generation through controlled temporal separation of power delivery.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically switches between different operating modes based on control unit decisions. The first inductor can be dynamically connected to either the first heating frequency unit alone or to both first and second heating frequency units. This dynamic reconfiguration of electrical connections provides adaptability in power distribution while preventing uneven heat generation by controlling when each frequency unit operates.

Inventive Principle:

Principle #15Dynamics

2Productivity

If heating frequency units operate simultaneously on multiple induction heating units, then power distribution is efficient, but component wear increases and voltage fluctuations occur

Engineering Contradiction:

Improvepower distribution efficiencyVSAvoidcomponent wear and voltage stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The control unit implements periodic operation where heating frequency units are switched on and off in defined cycles. During the first operating mode, both frequency units operate simultaneously for efficient power distribution. During the second operating mode, the second frequency unit is switched off, reducing component wear and voltage fluctuations. This periodic alternation maintains productivity while protecting system reliability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The first heating frequency unit continuously operates on the first induction heating unit across both operating modes, ensuring continuous useful action and power supply. The second heating frequency unit alternates between operating and non-operating states, maintaining overall system productivity through the first unit's continuous operation while allowing the second unit to rest, reducing wear and voltage stress.

Inventive Principle:

Principle #20Continuity of useful action

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 configuration achieves flexible and uniform heat generation, reduces wear on components, and minimizes voltage fluctuations, enhancing the overall efficiency and cost-effectiveness of the induction heating process.

Implementation Method 1

The induction heating element is intended to convert electrical energy into an alternating magnetic field, which is intended to cause eddy currents and/or magnetic reversal effects in a metallic, preferably at least partially ferromagnetic, heating medium

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Implementation Method 3

Methodology Applied

Scientific EffectMagnetic reversal effects: Magnetic Hysteresis

Implementation Method 4

an induction heating device, in particular an induction hob device

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Data Source

PatentEP2692202B1Induction heating device

Publication Date: 2017.01.04 BOSCH SIEMENS HAUSGERATE GMBH

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AI summary

The invention relates to an induction heating device, in particular an induction hot plate device, comprising at least one control unit (34), at least one first and one second induction heating unit (20, 22, 24, 26) and at least one first and one second heating frequency unit (30, 32) which, in at least one operating mode in which the first induction heating unit (20, 22, 24, 26) is connected directly to the first heating frequency unit (30, 32) and the second induction heating unit (20, 22, 10 24, 26) is connected directly to the second heating frequency unit (30, 32), are connected by means of the at least two induction heating units (20, 22, 24, 26). According to the invention, in order to increase the flexibility of the heating device, the control unit (34) is designed to operate heat frequency units (30, 32) in an operating mode in which said units are connected by means of the induction heating units (20, 22, 24, 26), in different operational sections (90, 91, 92, 93).