Cleaner for reducing inrush current and method for reducing inrush current of cleaner
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Solution Overview
Problem
Wireless cleaners experience frequent inrush currents due to capacitor discharge during connector decoupling and recoupling, leading to suspended operations and potential product damage, especially with multi-brush types used for different surfaces.
Innovation Solution
Incorporating a voltage detection circuit and inrush current reduction circuit with a resistor and switching device to monitor and control the inrush current, turning off the switching device when a voltage drop threshold is reached, and using a resistor to manage the current flow during capacitor charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching device is always on to allow capacitor charging, then the cleaner can operate normally, but inrush current occurs during connector decoupling and recoupling causing operation suspension and product damage
Solution Approach 1:
The voltage detection circuit continuously monitors the voltage applied to the brush device before connector recoupling occurs. When voltage drop exceeds the threshold, the switching device is preemptively turned off to prevent inrush current generation during capacitor charging, thereby maintaining operation stability while avoiding harmful inrush current effects
Solution Approach 2:
The system implements a feedback mechanism where the voltage detection circuit provides real-time voltage information to the processor, which then controls the switching device accordingly. This closed-loop control ensures that the switching device state is dynamically adjusted based on actual voltage conditions, preventing inrush current while maintaining normal operation
2Object-affected harmful factors
If the switching device is turned off to prevent inrush current, then inrush current is reduced, but the cleaner operation may be suspended
Solution Approach 1:
The feedback mechanism continuously monitors voltage conditions and dynamically controls the switching device. When voltage stabilizes after initial drop, the processor turns the switching device back on, ensuring that operation is resumed automatically once safe conditions are met, thus maintaining productivity while preventing inrush current damage
Solution Approach 2:
The system employs periodic voltage monitoring and switching device control. The voltage detection circuit repeatedly checks voltage conditions, and the switching device is periodically activated or deactivated based on these checks. This periodic action ensures that the cleaner operates continuously by temporarily suspending operation only when necessary to prevent inrush current, then resuming automatically
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
Significantly reduces inrush currents, preventing frequent operation suspensions and product damage, enhancing usability and extending the cleaner's lifespan.
Implementation Method 1
a capacitor charged with a voltage applied from the battery to the brush device
Implementation Method 2
an inrush current reduction circuit including a resistor configured to reduce an inrush current which occurs in charging the capacitor
Data Source
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AI summary
A cleaner includes a brush device including a voltage detection circuit configured to measure a voltage applied to the brush device from a battery, a capacitor charged with the voltage applied to the brush device from the battery, an inrush current reduction circuit including a resistor configured to reduce an inrush current which occurs in charging the capacitor and a switching device used to control the inrush current, and a processor configured to turn off the switching device included in the inrush current reduction circuit based on a drop rate of the voltage measured through the voltage detection circuit being at least a threshold rate.