Resonance Contactless Power Supply Constant Voltage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resonance-type contactless power supplies function as current sources and cannot provide a constant voltage, limiting their use for loads requiring constant voltage.
Innovation Solution
A resonance-type contactless power supply system that includes an inverter, a transmitter-side resonant circuit, a receiver-side resonant circuit, a rectifier circuit, and a control circuit, which switches between states to output a constant voltage by adjusting the switching control signals based on feedback voltage, ensuring the rectifier circuit provides a stable output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the resonance-type contactless power supply operates in self-inductance resonance frequency, then current source function is achieved, but constant voltage output capability is lost
Solution Approach 1:
The patent applies dynamics by making the operating frequency of the resonance-type contactless power supply adjustable rather than fixed. The control circuit dynamically switches between self-inductance resonance frequency (for current source mode) and mutual inductance resonance frequency (for constant voltage mode), allowing the system to adapt its characteristics based on load requirements.
Solution Approach 2:
The patent changes the operating parameter (resonance frequency) from a fixed value to a variable that can be switched between two distinct states. By changing the frequency parameter, the system transitions between different operational modes: current source mode at self-inductance resonance frequency and constant voltage mode at mutual inductance resonance frequency.
2Stability of the object's composition
If the resonance frequency is fixed for current source operation, then current stability is improved, but voltage adaptability for different loads deteriorates
Solution Approach 1:
The system dynamically adjusts its operating frequency based on the required output characteristic. When current stability is needed, it operates at self-inductance resonance frequency; when voltage adaptability is needed, it switches to mutual inductance resonance frequency. This dynamic frequency adjustment resolves the contradiction between fixed-frequency stability and adaptability.
Solution Approach 2:
The resonance-type contactless power supply is designed to perform multiple functions by operating at different resonance frequencies. It can function as both a current source (at self-inductance resonance frequency) and a constant voltage source (at mutual inductance resonance frequency), making it universally applicable to different types of loads.
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
Enables the resonance-type contactless power supply to deliver a relatively constant voltage, allowing it to be directly used with constant-voltage-type loads by optimizing the switching control mechanism between the inverter and rectifier circuit states.
Implementation Method 1
The receiving coil L2 and other components in a power receiver constitute a receiver-side resonant circuit. Electric energy is transferred in a contactless manner when the transmitter-side resonant circuit and the receiver-side resonant circuit have the same resonance frequency. The receiver-side resonant circuit is coupled to the transmitter-side resonant circuit by electromagnetic field
Implementation Method 2
Electric energy is transferred in a contactless manner when the transmitter-side resonant circuit and the receiver-side resonant circuit have the same resonance frequency. Typically, the above resonance frequency is referred to as a self-inductance resonance frequency.
Data Source
AI summary
The present disclosure relates to a resonance-type contactless power supply, an integrated circuit and a constant voltage control method. The resonance-type contactless power supply includes an inverter, a transmitter-side resonant circuit, a receiver-side resonant circuit, a rectifier circuit, and an output capacitance. In this resonance-type contactless power supply, the inverter receives electric energy, which is transferred to the rectifier circuit in a first state and is not transferred to the rectifier circuit in a second state. By switching between the first state and the second state, the resonance-type contactless power supply is controlled to provide a relatively constant voltage, and can be electrically coupled directly to a constant-voltage-type load.