Multi-Lamp Fusing Apparatus Power Control via Half-Cycle Interleaving
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Solution Overview
Problem
In xerographic printing, existing fusing apparatuses face challenges in efficiently managing power distribution between multiple heating elements, particularly when different power levels are required for various printing tasks, leading to inefficiencies in power consumption and heat distribution.
Innovation Solution
A method is introduced for operating a fusing apparatus with two or more lamps, where the arrangement of active half-cycles is coordinated to minimize simultaneous energy receipt and maximize interleaving between lamps, ensuring efficient power management by optimizing the number of active half-cycles per time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lamps are used in a fusing apparatus to provide different power levels for various printing tasks, then the adaptability and versatility of the system is improved, but the power consumption and heat distribution efficiency deteriorate due to simultaneous operation of multiple lamps
Solution Approach 1:
The patent applies periodic action by using AC cycle stealing to control multiple lamps. Instead of continuous operation, the system selectively activates specific half-cycles of AC power to each lamp based on the required power level. This periodic on/off pattern allows precise power control while reducing overall energy consumption when full power is not needed.
Solution Approach 2:
The patent segments the AC power cycle into discrete half-cycles that can be independently controlled for each lamp. By dividing the power delivery into segmented half-cycle intervals rather than continuous operation, the system can precisely control power levels and minimize simultaneous operation of multiple lamps, thereby reducing energy loss.
2Productivity
If multiple lamps operate simultaneously to provide sufficient heating power, then the productivity and fusing speed are improved, but the heat distribution uniformity and power management efficiency deteriorate
Solution Approach 1:
The system uses periodic half-cycle control to manage multiple lamps, activating them in alternating sequences rather than simultaneous operation. This periodic activation pattern allows the heat to distribute more uniformly across the fusing surface while maintaining adequate fusing speed, as the cumulative effect of sequential lamp operation provides consistent thermal distribution.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing optimal half-cycle arrangements in lookup tables before actual fusing operations. These pre-determined patterns ensure that when multiple lamps operate, their activation sequences are optimized in advance to achieve uniform heat distribution, avoiding the need for real-time complex calculations during high-speed printing.
3Device complexity
If the power supply system is simplified to reduce device complexity, then the ease of operation is improved, but the precision of power control and adaptability to different printing tasks deteriorates
Solution Approach 1:
The patent applies self-service by using the AC power cycle itself as the control mechanism rather than requiring complex external control circuits. The system leverages the inherent periodic nature of AC power, using half-cycle stealing where the power supply network itself provides the timing and control functions, thereby simplifying the overall device architecture while maintaining precise power control capability.
Solution Approach 2:
The system achieves precise power control through parameter changes in the AC waveforms themselves - specifically varying which half-cycles are active and adjusting the phase relationships between multiple lamps. By manipulating waveform parameters rather than adding complex control hardware, the system maintains high power control precision with simplified device architecture.
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 approach reduces power consumption and enhances heat distribution, allowing for precise control of power levels and improved fusing efficiency, resulting in durable and high-quality prints.
Implementation Method 1
in this way, durable, non-smudging images are rendered on the substrates
Data Source
AI summary
A fusing apparatus for xerographic printing includes two lamps therein. There is applied to the first lamp a first wave set and to the second lamp a second wave set, each wave set comprising a predetermined arrangement of active half-cycles for each time period. The first wave set and second wave set are related to substantially minimize simultaneous active half-cycles in each time period.