Modular Induction Gluing Units With Toroidal Transformers for Precise Heating
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Solution Overview
Problem
Existing induction bonding systems face challenges in providing ideal temperature control, are energy-inefficient, and difficult to set up for various components, especially when dealing with non-metallic materials like FRP, due to high current requirements and complex cooling systems, leading to mechanical distortion and high energy consumption.
Innovation Solution
The induction bonding system employs modular induction units with a toroidal transformer using amorphous metal alloy cores, allowing for low-current connections and adjustable heating power, along with a staggered cooling system to improve energy efficiency and flexibility, enabling precise temperature control and easier setup for different components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high current is used to provide sufficient inductive heating power, then heating effectiveness is improved, but energy losses in transmission paths increase and cooling requirements become enormous
Solution Approach 1:
The system divides the bonding station into multiple independently controllable channels, each with its own power supply and inductor. This segmentation allows each channel to operate at optimized current levels rather than forcing all inductors to run at maximum current, reducing overall energy losses in transmission paths while maintaining sufficient heating power at each bonding point.
Solution Approach 2:
Each channel is equipped with individual power supply and control electronics located directly at the inductor assembly. This localizes the high-current generation to the immediate vicinity of where it is needed, minimizing the length of high-current transmission paths and reducing I²R losses in cables and connectors.
2Device complexity
If all inductors are connected in series via a single power source, then device complexity is reduced, but temperature control precision at individual glue points deteriorates
Solution Approach 1:
The bonding station is divided into multiple independent channels, each with its own power supply and control system. This allows independent adjustment of heating parameters for each inductor, enabling precise temperature control at each glue point while adapting to local geometric and material requirements.
Solution Approach 2:
Each channel can independently vary its operating parameters (power, frequency, duty cycle) to match the specific requirements of each bonding location. This enables optimization of heating characteristics for different inductor geometries, material types, and bond line requirements without affecting other channels.
3Power
If manual adjustment of inductors is performed to adapt to individual heat requirements, then heating effectiveness is improved, but setup time and complexity increase
Solution Approach 1:
Each channel features programmable control parameters that can be stored and recalled for different bonding applications. This eliminates the need for manual mechanical adjustment of each inductor during setup, as the system can be quickly reconfigured by loading pre-programmed parameter sets for different component types and bonding requirements.
Solution Approach 2:
The system includes automated features such as adaptive power adjustment and diagnostic routines that reduce the need for manual intervention during setup and operation. The control system can automatically optimize heating parameters based on feedback from temperature sensors and process monitoring.
4Temperature
If water cooling system with pumps and heat exchangers is used to handle heat dissipation, then cooling capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The complex water cooling infrastructure (pumps, large heat exchangers, extensive piping) is removed from the bonding station. Instead, each channel uses compact solid-state heat sinks with forced air cooling, eliminating the need for a centralized liquid cooling system and its associated complexity.
Solution Approach 2:
The mechanical water cooling system is replaced with solid-state thermal management using heat sinks and fans. This substitution eliminates moving parts (pumps, valves), complex fluid handling infrastructure, and reduces maintenance requirements while providing sufficient cooling for the inductors and electronics.
5Power
If high current is required to supply the last spot in a series connection, then heating power is improved, but heat generation along the transmission path increases cooling requirements
Solution Approach 1:
The system divides the bonding station into multiple channels with distributed power supplies. Each channel provides localized high-current output to its assigned inductors, eliminating the need to transmit high current over long distances through a single series connection. This reduces I²R heating in transmission paths while maintaining sufficient power at remote bonding spots.
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 reduces energy consumption, simplifies setup, and enhances temperature control precision, allowing for efficient bonding of various materials, including non-metallic composites, while minimizing mechanical distortion and cooling system complexity.
Implementation Method 1
induction units (100) with a toroidal transformer (103) using amorphous metal alloy cores
Implementation Method 2
amorphous metal alloy cores
Implementation Method 3
through which the inductive heating power is applied
Implementation Method 4
induction units that bring about the inductive bonding
Implementation Method 5
cooling system with which the necessary cooling of the induction bonding system can be achieved
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to an induction unit (100) suitable for the inductive bonding of components using a multi-spot bonding process. The induction unit (100) comprises a transformer (103) detachably connected to at least one inductor (102) arranged on a holding device to form a transportable component unit, wherein an input of the transformer (103) is connected to a low-current line and wherein a high-current line (105) leads from an inductor-side output of the transformer (103) to the at least one inductor (102). The transformer (103) has a toroidal core material made of an amorphous metal alloy. Furthermore, the invention relates to a gelling station (10) comprising a plurality of induction units (100) and an induction bonding system comprising at least one gelling station (10) according to the invention.Finally, the invention relates to an induction system for the stepwise heating of inductively heatable workpieces, as well as two control methods: one for the ambient temperature-dependent energy-controlled operation of such an induction gluing system and one for heating the inductors of an induction gluing system; and furthermore, an automatic self-adjustment method for setting the heating power of the induction units (100) of an induction gluing system.