Wireless Power Receiver Voltage Control for Inrush Current
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Solution Overview
Problem
Wireless charging can be disrupted due to sudden changes in current consumption or voltage fluctuations, leading to instability and heat generation in the charging system.
Innovation Solution
A wireless power receiving device and control method that dynamically adjust the charging voltage based on detected changes in current consumption or voltage, using a current sensing circuit and control circuit to transmit signals for adjusting the transmission voltage from an external device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless charging is performed with fixed voltage, then the charging system is simple to operate, but the charging is disrupted when current consumption fluctuates
Solution Approach 1:
The patent implements dynamic voltage adjustment by enabling the control circuit to modify the charging voltage in real-time based on detected current consumption levels. The controller transitions from fixed voltage mode to dynamic voltage modulation, adjusting the voltage upward when inrush current is detected and downward when current consumption decreases, thereby maintaining charging stability throughout the charging process.
Solution Approach 2:
The patent incorporates a feedback mechanism where the controller continuously monitors current consumption through the charging circuit and adjusts the charging voltage accordingly. The controller detects current levels and uses this feedback information to dynamically modify the voltage output, creating a closed-loop control system that responds to changing load conditions and prevents charging disruption.
2Reliability
If transmission voltage is increased to handle inrush current, then charging continuity is maintained, but heat generation increases
Solution Approach 1:
The patent applies dynamic voltage adjustment to match the transmission voltage with actual charging needs. When inrush current occurs, the controller increases voltage to maintain charging continuity; when current consumption decreases, the controller reduces voltage to minimize heat generation. This dynamic adaptation allows the system to maintain reliability while optimizing thermal performance throughout the charging cycle.
Solution Approach 2:
The controller performs periodic detection of current consumption levels and adjusts voltage in periodic cycles. By detecting current at regular intervals and making corresponding voltage adjustments, the system maintains charging continuity during inrush events while returning to lower voltage states between events, thereby reducing overall heat generation compared to sustained high-voltage operation.
3Reliability
If voltage is dynamically adjusted based on current detection, then charging stability is improved, but device complexity increases
Solution Approach 1:
The controller performs multiple functions within a single integrated circuit: it detects current consumption levels, determines whether inrush current is present, decides on voltage adjustment actions, and executes the voltage modification. By consolidating these functions into one multi-functional controller, the patent achieves charging stability through dynamic voltage adjustment while minimizing the increase in overall device complexity.
Solution Approach 2:
The control circuit automatically detects current consumption changes and adjusts voltage without requiring external intervention or complex external control systems. The controller self-monitors the charging state through the existing charging circuit and autonomously makes voltage adjustments, thereby improving charging stability while avoiding the need for additional complex control hardware or manual intervention.
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
Prevents disruption of wireless charging and reduces heat generation by stabilizing the charging voltage, ensuring continuous and efficient power transfer.
Implementation Method 1
a coil; a reception circuit electrically connected to the coil
Implementation Method 2
a current sensing circuit configured to sense an inrush current caused by the system
Data Source
AI summary
An electronic device acting as a power receiving device and a control method. The electronic device includes a battery, a coil, a reception circuit electrically connected to the coil, a charger a current sensing circuit, and at least one control circuit. The charger supplies a specified voltage to a system and controls the state of charge of the battery by using the voltage supplied from the reception circuit. The current sensing circuit is configured to sense an inrush current caused by the system. The at least one control circuit is configured to transmit a first control signal for requesting to increase a transmission voltage supplied from an external electronic device when an inrush current is detected through the current sensing circuit.