Contactless Energy Transfer via Pulse Width Modulation
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Solution Overview
Problem
Existing wireless sensor systems face challenges in efficiently transferring energy and data contactlessly between a base part and a mobile part while minimizing energy emission and radiation exposure, and preventing unnecessary heating of components.
Innovation Solution
A system with a mobile part containing a resonant circuit and a base part with a pulse width modulator that emits energy signals in pulse bundles, optimizing energy transfer through parameter settings in the pulse width-modulated signal to ensure sufficient supply voltage for the mobile part with minimal energy emission, and using a buffer capacitor for efficient voltage production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous energy signal emission is used to power the mobile part, then reliable energy supply is achieved, but energy waste and radiation exposure increase
Solution Approach 1:
The energy signal generator emits energy signals in periodic pulse bundles rather than continuously. The pulse width modulator controls the duty cycle of these pulses, allowing the mobile part to accumulate sufficient energy while minimizing overall energy emission and radiation exposure.
Solution Approach 2:
The system dynamically adjusts parameters of the pulse width-modulated signal including pulse duration, pulse frequency, and duty cycle to optimize energy transfer efficiency. This ensures the mobile part receives sufficient energy while minimizing energy waste in the base part and surrounding environment.
2Reliability
If high energy emission is used to ensure sufficient supply voltage, then mobile part operation is reliable, but heating of components occurs
Solution Approach 1:
By using periodic pulse bundles instead of continuous emission, the system allows cooling periods between pulses, preventing excessive heat accumulation in components while still delivering sufficient energy during the pulse periods to maintain reliable operation.
Solution Approach 2:
The system replaces traditional continuous power supply mechanisms with a pulsed electromagnetic field-based energy transfer system, enabling precise control over energy delivery timing and intensity to avoid unnecessary heating.
3Loss of energy
If pulse width modulation is used to minimize energy emission, then energy efficiency improves, but control precision becomes more difficult
Solution Approach 1:
The system incorporates feedback mechanisms where the base part receives data signals from the mobile part and uses this information to dynamically adjust the pulse width modulation parameters. This closed-loop control ensures optimal energy efficiency while maintaining precise control over the energy transfer process.
Solution Approach 2:
The pulse width modulation parameters are made dynamically adjustable based on operational conditions, distance between base and mobile parts, and energy requirements. This dynamic adaptation simplifies control while maximizing energy efficiency across varying operating scenarios.
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
The system achieves low energy requirements, reduces radiation exposure, and prevents heating by emitting only the minimum necessary energy, ensuring reliable operation of the mobile part with a battery-free energy supply and clear data signal recognition within a predetermined distance.
Implementation Method 1
a base part resonant circuit (Lb, Cb) via which a base part resonant circuit emits an energy signal from which the current supply of the mobile part gains a supply voltage
Implementation Method 2
provision of a pulse width-modulated signal is provided by the pulse width modulator such that a cyclic operation of the energy signal generator is provided with the pulse width-modulated signal
Implementation Method 3
a mobile part resonant circuit (Lm, Cm) to receive an energy signal and a base part resonant circuit (Lb, Cb) via which a base part resonant circuit emits an energy signal
Data Source
AI summary
A system for contactless energy and data transfer has mobile and base parts. The mobile part contains a mobile part transmitter/receiver device transmitting and receiving a data signal, a mobile part transceiver and a current supply having a mobile part resonant circuit receiving an energy signal. The base part contains a base part resonant circuit for emitting the energy signal from an energy signal generator to provide a supply voltage to the current supply, a base part transmitter/receiver device receiving and transmitting the data signal, a base part transceiver, and a pulse width modulator. An impulse width modulator provides the pulse width-modulated signal which cyclically operates the energy signal generator to emit the energy signal in pulse bundles. A parameter specification provides a control signal setting at least one parameter of the pulse width-modulated signal to a value where sufficient energy transfer occurs to provide the supply voltage.