Voltage Collection Bootstrap Circuit Self-Powering Inductor

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Solution Overview

Problem

In portable electronic devices, battery life is limited by the power consumption of components that recharge the battery, which offsets the energy provided by recharging.

Innovation Solution

A voltage collection bootstrap circuit that includes a capacitor, inductor, oscillator, bias circuit, and switch, where induced currents are used to store and supply energy, reducing the need for battery power by using the inductor, capacitor, and oscillator to provide energy to the circuit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If battery power is used to power the voltage collection circuit, then the circuit can operate reliably, but the battery energy is consumed rapidly

Engineering Contradiction:
Improvecircuit operation reliabilityVSAvoidbattery energy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The voltage collection circuit powers itself by using the induced current from the oscillating magnet to charge the capacitor and supply energy to the circuit components, eliminating the need for external battery power and enabling self-sustained operation

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The circuit transitions from being powered by battery voltage to being powered by capacitor voltage charged from induced current, changing the energy source parameter from external battery to self-generated electromagnetic energy

Inventive Principle:
Principle #35Parameter changes

2Duration of action of moving object

If recharging mechanisms are added to extend battery life, then the device can be recharged when away from a charger, but the recharging components consume power that offsets the provided energy

Engineering Contradiction:
Improvebattery lifeVSAvoidenergy offset by recharging components
Core Design Contradiction:
Duration of action of moving objectVSLoss of energy

Solution Approach 1:

The voltage collection circuit generates its own operating power from the induced current, so no additional battery power is needed to run the recharging components, eliminating the energy offset problem and truly extending battery life

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The oscillating magnet that induces current is converted from a passive motion into an active power generation source, transforming mechanical motion into electrical energy that powers the circuit and extends battery life

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

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 reduces the amount of battery energy used to power the voltage collection circuit, extending battery life by utilizing induced currents to recharge the device.

Implementation Method 1

A current may be induced in the inductor, the oscillator, or both. The inductor, the oscillator, or both may store energy in the capacitor.

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS10224873B1Voltage collection bootstrap circuit
Publication Date: 2019.03.05 APPLE INC
  • US10224873B1 patent drawing
  • US10224873B1 patent drawing
  • US10224873B1 patent drawing

AI summary

In various embodiments, a voltage collection bootstrap circuit includes a capacitor, an inductor, an oscillator, a bias circuit, and a switch. A current may be induced in the inductor, the oscillator, or both. The inductor, the oscillator, or both may store energy in the capacitor. The inductor, capacitor, and oscillator may supply energy to the bias circuit. The bias circuit may output a difference between a reference voltage and a voltage corresponding to the energy received from at least one of the inductor, capacitor, and oscillator. Based on the output of the bias circuit, a switch may connect the voltage collection circuit to an output of at least one of the inductor, capacitor, and oscillator. Accordingly, energy may be provided to the voltage collection circuit using one or more induced currents.