Low-Power Wireless Charging Auxiliary Control Unit
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Solution Overview
Problem
Existing wireless charging apparatuses using the magnetic induction scheme consume excessive power due to continuous receiver detection, as they require periodic transmission of detection signals to identify and authenticate receivers, even when no devices are present.
Innovation Solution
A low-power wireless charging system employing a low-priced auxiliary control unit to periodically detect receivers and generate wake-up signals only when devices are present, activating the main control unit to transmit power signals efficiently, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main control unit continuously transmits receiver detection signals to detect receivers, then receiver detection reliability is improved, but power consumption increases
Solution Approach 1:
The control unit is divided into two functional parts: a low-power auxiliary control unit that continuously monitors for receivers using minimal power, and a main control unit that activates only when a receiver is detected. This segmentation allows continuous detection capability while dramatically reducing average power consumption, as the main control unit remains dormant most of the time.
Solution Approach 2:
The system implements periodic detection cycles where the auxiliary control unit periodically checks for receivers and only triggers the main control unit when necessary. This periodic action pattern replaces continuous high-power operation with intermittent low-power monitoring, maintaining detection reliability while reducing overall power consumption.
2Reliability
If the main control unit is activated continuously to handle receiver authentication and power transmission, then charging functionality is ensured, but unnecessary power consumption occurs when no receivers are present
Solution Approach 1:
The auxiliary control unit performs preliminary detection of receivers before activating the main control unit. This preliminary action filters out periods when no receivers are present, preventing the main control unit from activating unnecessarily. Only when the auxiliary unit detects a receiver does it trigger the main control unit, ensuring charging functionality is maintained while eliminating wasted energy during idle periods.
Solution Approach 2:
The auxiliary control unit independently handles the detection and initial filtering function, serving the system's need for receiver detection without requiring the main control unit's continuous operation. This self-service capability of the auxiliary unit allows the main control unit to remain dormant, reducing unnecessary power consumption while ensuring charging functionality is available when needed.
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 significantly reduces power consumption by minimizing the operation of the main control unit to only when receivers are detected, enhancing the efficiency and reducing the burden on the system.
Implementation Method 1
a sensing unit detecting a current and a voltage according to a magnetic field changed by one or more of the plurality of primary coils by the receiver detect signals
Implementation Method 2
the magnetic induction scheme is a power transmission scheme using electromotive force induced from a magnetic field
Data Source
AI summary
Disclosed herein is a low-power wireless charging apparatus including: a plurality of primary coils corresponding to a plurality of receivers, respectively; a plurality of drivers periodically and sequentially transmitting receiver detect signals; a sensing unit detecting a current and a voltage according to a magnetic field changed by one or more of the plurality of primary coils; a comparator comparing the detected current and voltage with pre-set values; a low-power auxiliary control unit generating a wake-up signal when one or more receivers are present; and a main control unit turned on upon receiving the wake-up signal, and controlled to generate a wireless power signal for charging a corresponding receiver and transmit, whereby unnecessary power consumption can be prevented and the burden of the main control unit can be lessened, thus increasing efficiency.