Dynamic Inductive Power Transmitter Modules for Moving Vehicle Detection
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Solution Overview
Problem
Current wireless power transfer technologies face challenges in efficiently and dynamically transmitting power to moving vehicles, particularly in distinguishing and aligning with vehicles equipped with receiver coils while avoiding those that do not require power, especially at high speeds and varying positions.
Innovation Solution
A dynamic inductive wireless power transmitter system and power transmitter module that includes an AC-to-DC power converter, system controller, and multiple power transmitter modules connected in series, capable of detecting and aligning with vehicles containing receiver coils, and transmitting power only when necessary, using a secure communication protocol and vehicle detection circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power is transmitted continuously to all vehicles, then power availability is improved, but energy waste increases due to transmitting to vehicles without receiver coils
Solution Approach 1:
The system employs detection circuits that continuously monitor for the presence of receiver coils in vehicles. When a receiver coil is detected, the system activates power transmission; when no receiver coil is present, transmission is deactivated. This feedback mechanism ensures power is only transmitted when needed, eliminating energy waste while maintaining availability for eligible vehicles.
Solution Approach 2:
The wireless power transmission system dynamically adjusts its operational state based on real-time detection of vehicle presence and receiver coil configuration. The system transitions between active and inactive states, optimizing energy utilization by aligning power transmission with actual demand from vehicles that require it.
2Adaptability or versatility
If power transmission is activated for all vehicles, then service coverage is improved, but system efficiency deteriorates due to unnecessary power transmission
Solution Approach 1:
The system segments its service coverage by individually evaluating each vehicle's eligibility for power transmission. Rather than treating all vehicles uniformly, the detection circuits assess each vehicle's receiver coil presence independently, allowing the system to provide targeted service to eligible vehicles while excluding ineligible ones, thereby improving overall system efficiency.
Solution Approach 2:
The system applies different operational characteristics to different vehicles based on their individual properties. Vehicles with receiver coils receive power transmission service, while vehicles without receiver coils do not. This local differentiation optimizes system efficiency by avoiding unnecessary power transmission to vehicles that cannot utilize it.
3Measurement precision
If vehicle detection and alignment systems are added, then power transmission accuracy is improved, but device complexity increases
Solution Approach 1:
The system introduces detection circuits as intermediary components that mediate between the power transmission system and vehicles. These circuits detect the presence of receiver coils and provide alignment information, enabling accurate and selective power transmission without requiring complex mechanical or electronic control systems.
Solution Approach 2:
The patent replaces complex mechanical alignment and verification systems with electromagnetic detection circuits. By using electromagnetic fields to detect receiver coils and determine vehicle alignment, the system achieves high measurement precision while avoiding the complexity of mechanical sensors, actuators, and control mechanisms.
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 efficient and safe inductive wireless power transfer to vehicles in motion, optimizing energy delivery by ensuring only aligned and eligible vehicles receive power, reducing unnecessary energy consumption and enhancing system modularity and cost-effectiveness.
Implementation Method 1
a transmitter coil and compensation circuit configured to receive the high frequency AC current from the module transmitter circuit and generate a time-varying magnetic field
Data Source
AI summary
A method for a dynamic inductive wireless power transmission includes providing an AC/DC power converter that receives three-phase power and provides regulated DC output current, connecting a trunk cable to the AC/DC power converter output and to multiple power transmitter modules. The trunk cable connects inputs of the power transmitter modules in series. The power transmitter modules transmit inductive wireless power over an air gap. The method includes providing a system controller that detects a vehicle containing a receiver coil and confirms if the vehicle should receive the inductive wireless power from the multiple power transmitter modules, and includes configuring the system controller to communicate with the AC/DC power converter to maintain the regulated DC output current at a constant value and transmit the inductive wireless power to the vehicle through the multiple power transmitter modules when the vehicle should receive the inductive wireless power.