Wireless Power Supply Inverter Mode Switching for Wide Range Output
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Solution Overview
Problem
Conventional wireless power-supplying systems are limited in their ability to adjust electric power supply across a wide power range, as they require both the voltage step-up chopper circuit and inverter circuit to operate simultaneously, making it difficult to supply power from high to low power levels efficiently.
Innovation Solution
A power-supplying device with a switching control unit that controls the inverter circuit to convert DC power to AC power and determines whether the voltage converter steps up the input voltage based on output values from the voltage converter or rectification circuit, allowing for operation of the inverter circuit alone or in conjunction with the voltage converter to achieve a wider power range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both the voltage step-up chopper circuit and inverter circuit are operated simultaneously, then the electric power supply is stable and reliable, but the power range adjustment capability is limited
Solution Approach 1:
The patent implements dynamic switching between full-bridge mode and single-ended mode in the inverter circuit. The control unit dynamically adjusts the operating mode based on the required output power level, enabling the system to adapt to different power ranges while maintaining stable operation. This dynamic reconfiguration allows the inverter to operate efficiently across a wide power range without requiring both chopper and inverter circuits to run simultaneously at full capacity.
Solution Approach 2:
The patent changes the operating parameters of the inverter circuit by switching between full-bridge and single-ended configurations. In full-bridge mode, all switching elements operate to provide high power output, while in single-ended mode, only some switching elements are active for low power output. This parameter change enables the system to cover a wide power range while maintaining reliability through controlled operation modes.
2Power
If the voltage step-up chopper circuit is operated to increase power output, then the electric power supply capability is improved, but the device complexity increases
Solution Approach 1:
The inverter circuit is designed to perform multiple functions by operating in different modes. The same inverter circuit can operate in full-bridge mode for high power output or single-ended mode for low power output, eliminating the need for separate dedicated circuits for different power levels. This multi-functionality reduces device complexity while maintaining high power output capability 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 solution enables the supply of electric power across a broader power range by allowing the inverter circuit to operate independently or in conjunction with the voltage converter, enhancing flexibility and efficiency in power adjustment.
Implementation Method 1
a primary coil configured to supply electric power through electromagnetic induction based on the high-frequency power supplied from the high-frequency power driver
Implementation Method 2
a primary self-resonance coil configured to supply electric power to an electric vehicle through an electromagnetic field based on the electric power supplied from the primary coil
Implementation Method 3
a secondary self-resonance coil configured to receive the electric power from the primary self-resonance coil of the power-supplying device through the electromagnetic field
Data Source
AI summary
A power-supplying device for wirelessly transmitting alternating current (AC) power to a power-receiving device includes a voltage converter, an inverter circuit connected to the voltage converter, a communication unit configured to receive an output value of a rectification circuit provided in the power-receiving device from the power-receiving device, and a switching control unit configured to control the inverter circuit so that the inverter circuit converts direct current (DC) power into AC power and control whether the voltage converter steps up an input voltage or not based on whether an output value of the voltage converter or the output value of the rectification circuit reaches a specific value.