Clothing Dryer Multi-Inverter Control for Stable Motor Operation
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Solution Overview
Problem
Current clothing treatment apparatuses face challenges in independently controlling the rotation of drums and blower fans, leading to instability and potential overloads due to shared motor connections, which can result in leakage currents, overheating, and inaccurate control, especially when increasing drying capacity.
Innovation Solution
A clothing treatment apparatus with separate motors for the drum, blower fan, and compressor, utilizing multiple inverters and a converter to manage power distribution and control, with a control unit that adjusts switching signals and pulse width modulation to stabilize operations and prevent overheating and leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor is used to drive both the drum and blower fan, then the device complexity is reduced, but the control accuracy and operational stability deteriorate
Solution Approach 1:
The patent divides the single motor system into separate motors for the drum and blower fan, allowing independent control of each component. This segmentation enables precise control of drum rotation speed and blower fan operation independently, resolving the control accuracy issue while maintaining manageable device complexity through modular motor control architecture.
2Productivity
If multiple motors and inverters are added to increase drying capacity, then the productivity is improved, but the reliability deteriorates due to overload and leakage currents
Solution Approach 1:
The patent implements a control unit that monitors operational parameters and adjusts the driving of multiple motors and inverters based on real-time feedback. This prevents overload conditions and leakage currents by dynamically controlling power distribution, enabling high drying capacity while maintaining operational reliability through active monitoring and adjustment.
Solution Approach 2:
The system uses dynamic control of multiple inverters to adjust motor speeds and power consumption based on operational conditions. This dynamic adjustment prevents static overload conditions and ensures reliable operation at high productivity levels by adapting power distribution to actual system needs.
3Measurement precision
If the number of inverters is increased to control multiple motors independently, then the control accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs a control unit that serves multiple functions: monitoring, coordinating, and controlling multiple inverters and motors simultaneously. This universal control approach enables precise independent control of each motor while managing the complexity of multiple inverters through integrated control logic, reducing the need for separate control systems for each component.
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
The solution enables stable and efficient operation of the clothing treatment apparatus by independently controlling motors, reducing the risk of overloads and leakage currents, improving control accuracy, and maintaining stability even with increased drying capacity.
Implementation Method 1
a converter that converts input power to output power
Implementation Method 2
a plurality of inverters that convert the received DC power into driving power to apply the converted DC power to each of the plurality of motors
Implementation Method 3
utilizing multiple inverters and a converter to manage power distribution and control, with a control unit that adjusts switching signals and pulse width modulation
Implementation Method 4
a compressor of a heat pump that compresses refrigerant
Data Source
AI summary
The present specification relates to a clothing treatment apparatus and a control method therefor, the clothing treatment apparatus comprising: a plurality of inverters for controlling the motors of a drum, a compressor, and a blowing fan; a converter for converting input power input from an external source and outputting the converted power to the inverters; and a control unit for controlling the plurality of inverters and the converter.