Contactless Power Supply Regenerative Power Allocation
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Solution Overview
Problem
The use of power storage sections like charge capacitors or batteries in contactless power supply devices increases the weight and size of the power-receiving-side device, which is problematic for applications in moving bodies.
Innovation Solution
A contactless power supply device with a first DC transformer circuit that transforms received AC power to a DC load voltage and has a reverse transfer function to allocate regenerative power generated by an electric load back to other loads, eliminating the need for a power storage section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a power storage section (charge capacitor or battery) is used to store regenerative power, then regenerative power can be effectively utilized to drive electric loads, but the weight and size of the power-receiving-side device increase
Solution Approach 1:
The invention extracts and removes the power storage section (charge capacitor or battery) from the power-receiving-side device. Instead of storing regenerative power locally, the system directly transfers regenerative power from the first electric load to the second electric load through the DC transformer circuit, eliminating the need for heavy power storage components while maintaining effective regenerative power utilization.
Solution Approach 2:
The DC transformer circuit acts as an intermediary between the first and second electric loads. It enables direct power transfer from the first load (generating regenerative power) to the second load (consuming power) without requiring a power storage section. The DC transformer circuit mediates the power flow, allowing efficient regenerative power utilization while keeping the power-receiving-side device lightweight.
2Use of energy by moving object
If a power storage section is added to store regenerative power, then regenerative power can be used when large amounts of power are needed, but the size of the power-receiving-side device increases
Solution Approach 1:
The invention removes the power storage section from the power-receiving-side device, extracting the function of power storage and replacing it with direct power transfer. The DC transformer circuit enables regenerative power to be transferred directly to electric loads as needed, eliminating the volume occupied by charge capacitors or batteries while maintaining the capability to use regenerative power when required.
Solution Approach 2:
The DC transformer circuit serves as an intermediary that enables direct power transfer between electric loads without requiring local power storage. This mediator approach allows the system to maintain the flexibility of using regenerative power when needed while avoiding the volume increase associated with power storage sections.
3Weight of moving object
If regenerative power is transferred to other electric loads without a power storage section, then the weight and size of the power-receiving-side device are reduced, but power management complexity increases
Solution Approach 1:
The DC transformer circuit acts as an intelligent intermediary that simplifies power management. It automatically manages the transfer of regenerative power from the first electric load to the second electric load based on power availability and demand, eliminating the need for complex control systems that would be required for direct power transfer without an intermediary component.
Solution Approach 2:
The DC transformer circuit with reverse transfer function provides self-service power management. It automatically handles the bidirectional power flow, enabling the system to manage regenerative power transfer without requiring external complex control mechanisms. The circuit itself performs the power management function, reducing overall system complexity despite eliminating the power storage section.
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 configuration allows for the effective use of regenerative power without increasing the weight and size of the power-receiving-side device, reducing the load on the contactless power supply and simplifying the device's circuit configuration.
Implementation Method 1
A contactless power supply device includes: a contactless power supply section configured to supply AC power in a contactless manner; a contactless power receiving section disposed so as to face the contactless power supply section and configured to receive the AC power in a contactless manner
Implementation Method 2
a first DC transformer circuit configured to transform, to a DC load voltage, a DC reception-power voltage obtained by converting an AC voltage of the AC power received by the contactless power receiving section
Data Source
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AI summary
Contactless power supply device (1) of the present invention includes: contactless power supply section (2) that supplies AC power in a contactless manner; contactless power receiving section (3) that receives the AC power in a contactless manner; first DC transformer circuit (51) that transforms, to DC load voltage (V1), DC reception-power voltage (VR) obtained from the contactless power receiving section and supplies the DC load voltage to first electric load (91), and that has a reverse transfer function of transferring regenerative power (W1) generated by the first electric load in a reverse direction; and second DC transformer circuit (59) that transforms the DC reception-power voltage to DC load voltage (V2) and supplies the DC load voltage to second electric load (99). Accordingly, the generated regenerative power is allocated and made available to the other electric load, and a power storage section is not necessary, which suppresses an increase in the weight and size of the power-receiving-side device.