# 🔋 WIA-COMM-008: Wireless Charging Standard

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> **Standard ID:** WIA-COMM-008
> **Version:** 1.0.0
> **Status:** Active
> **Category:** COMM / Communication & Network
> **Color:** Blue (#3B82F6)

---

## 🌟 Overview

The WIA-COMM-008 standard defines the comprehensive framework for wireless charging technology, encompassing Qi inductive coupling, magnetic resonance charging, power delivery protocols, efficiency optimization, foreign object detection (FOD), and safety standards.

**홍익인간 (弘益人間) - Benefit All Humanity** - This standard aims to provide a unified framework for wireless charging technologies that enable convenient, safe, and efficient power delivery across all devices and vehicles.

## 🎯 Key Features

- **Qi Standard**: WPC Qi inductive coupling (5W, 7.5W, 15W)
- **Magnetic Resonance**: AirFuel resonant charging technology
- **Power Levels**: Low (5W), Medium (15W), High (50W+), EV (up to 350kW)
- **Efficiency Optimization**: Coil alignment, impedance matching, thermal management
- **Foreign Object Detection (FOD)**: Metal detection and safety mechanisms
- **Multi-Device Charging**: Simultaneous charging of multiple devices
- **EV Wireless Charging**: High-power inductive charging for electric vehicles
- **Alignment Systems**: Visual, auditory, and haptic feedback
- **Thermal Management**: Temperature monitoring and cooling systems
- **EMF Safety**: Electromagnetic field exposure limits and shielding
- **Interoperability**: Cross-platform device compatibility
- **Future Standards**: AirFuel Alliance, SAE J2954, ISO 19363

## 📊 Core Concepts

### 1. Inductive Coupling

```
P = k × √(P₁ × P₂)
```

Where:
- `P` = Power transferred (watts)
- `k` = Coupling coefficient (0-1)
- `P₁` = Transmitter power (watts)
- `P₂` = Receiver power capacity (watts)

### 2. Efficiency Calculation

```
η = (P_out / P_in) × 100%
```

Where:
- `η` = Efficiency (percentage)
- `P_out` = Output power at receiver (watts)
- `P_in` = Input power at transmitter (watts)

### 3. Quality Factor (Q)

```
Q = 2πfL / R
```

Where:
- `Q` = Quality factor (dimensionless)
- `f` = Operating frequency (Hz)
- `L` = Inductance (henries)
- `R` = Resistance (ohms)

## 🔧 Components

### TypeScript SDK

```typescript
import {
  calculateChargingEfficiency,
  designTransmitterCoil,
  detectForeignObject,
  optimizeAlignment
} from '@wia/comm-008';

// Calculate charging efficiency
const efficiency = calculateChargingEfficiency({
  inputPower: 15, // watts
  outputPower: 12, // watts
  distance: 5, // mm
  frequency: 110000 // Hz (110 kHz)
});

// Design transmitter coil
const coil = designTransmitterCoil({
  targetPower: 15, // watts
  frequency: 110000, // Hz
  diameter: 50, // mm
  turns: 20
});

console.log(`Efficiency: ${efficiency.percentage}%`);
console.log(`Coil inductance: ${coil.inductance} μH`);
```

### CLI Tool

```bash
# Calculate charging efficiency
wia-comm-008 calc-efficiency --input 15W --output 12W --distance 5mm

# Design transmitter coil
wia-comm-008 design-coil --power 15W --freq 110kHz --diameter 50mm

# Detect foreign objects
wia-comm-008 detect-fod --threshold 0.1 --baseline-impedance 50

# Optimize alignment
wia-comm-008 optimize-align --offset-x 2mm --offset-y 3mm

# Calculate EMF exposure
wia-comm-008 calc-emf --power 15W --distance 10mm --freq 110kHz
```

## 📚 Documentation

| Document | Description |
|----------|-------------|
| [WIA-COMM-008-v1.0.md](./spec/WIA-COMM-008-v1.0.md) | Complete specification with wireless charging theory |
| [TypeScript SDK](./api/typescript/) | Full TypeScript implementation |
| [CLI Tool](./cli/wia-comm-008.sh) | Command-line interface |

## 🚀 Quick Start

### Installation

```bash
# Clone repository
git clone https://github.com/WIA-Official/wia-standards.git
cd wia-standards/standards/wireless-charging

# Run installation script
./install.sh

# Verify installation
wia-comm-008 --version
```

### TypeScript Usage

```bash
# Install via npm
npm install @wia/comm-008

# Or yarn
yarn add @wia/comm-008
```

```typescript
import { WirelessChargingSDK } from '@wia/comm-008';

const sdk = new WirelessChargingSDK();

// Design Qi-compatible charger
const charger = sdk.designQiCharger({
  powerLevel: 15, // watts (Qi EPP)
  frequency: 110000, // Hz
  coilDiameter: 50, // mm
  voltage: 5 // volts
});

console.log(`Coil turns: ${charger.coilTurns}`);
console.log(`Expected efficiency: ${charger.efficiency}%`);
console.log(`Max distance: ${charger.maxDistance} mm`);
```

## 🔌 Power Levels

### Consumer Devices (Qi Standard)

| Power Level | Standard | Typical Devices | Frequency |
|-------------|----------|-----------------|-----------|
| 5W | Qi BPP | Smartphones, earbuds | 110-205 kHz |
| 7.5W | Qi BPP+ | iPhone 8-12 | 110-205 kHz |
| 15W | Qi EPP | Android flagships | 110-205 kHz |
| 30W | Qi v1.3 | Laptops, tablets | 110-205 kHz |

### High-Power Applications

| Power Level | Application | Standard | Frequency |
|-------------|-------------|----------|-----------|
| 50W | Laptops | AirFuel | 6.78 MHz |
| 11kW | Home EV charging | SAE J2954 WPT1 | 85 kHz |
| 22kW | Public EV charging | SAE J2954 WPT2 | 85 kHz |
| 350kW | Fast EV charging | ISO 19363 | 85 kHz |

## 🧲 Charging Technologies

### 1. Inductive Coupling (Qi)

- **Principle**: Electromagnetic induction between coils
- **Range**: 0-10 mm
- **Efficiency**: 70-85%
- **Frequency**: 110-205 kHz (consumer), 85 kHz (EV)
- **Advantages**: Mature, widely adopted, cost-effective
- **Limitations**: Short range, precise alignment required

### 2. Magnetic Resonance (AirFuel)

- **Principle**: Resonant magnetic coupling
- **Range**: 0-50 mm
- **Efficiency**: 60-80%
- **Frequency**: 6.78 MHz
- **Advantages**: Longer range, multiple devices, flexible positioning
- **Limitations**: Higher cost, larger components

### 3. RF/Microwave (Far-Field)

- **Principle**: Radio frequency power transmission
- **Range**: 1-10 meters
- **Efficiency**: 10-40%
- **Frequency**: 900 MHz - 5.8 GHz
- **Advantages**: Very long range, no alignment needed
- **Limitations**: Low efficiency, safety concerns, regulatory limits

## 🛡️ Safety Standards

### Foreign Object Detection (FOD)

```typescript
interface FODConfig {
  /** Detection threshold (0-1) */
  threshold: number;

  /** Baseline impedance (ohms) */
  baselineImpedance: number;

  /** Q-factor change threshold */
  qFactorThreshold: number;

  /** Temperature rise threshold (°C) */
  temperatureThreshold: number;
}
```

### EMF Exposure Limits

| Standard | Frequency Range | Magnetic Field Limit | Electric Field Limit |
|----------|-----------------|---------------------|---------------------|
| ICNIRP | 110-205 kHz | 6.25 μT | 83 V/m |
| IEEE C95.1 | 3 kHz - 10 MHz | 27 μT | 614 V/m |
| SAE J2954 | 85 kHz (EV) | 27 μT | 100 V/m |

### Thermal Management

- **Temperature monitoring**: NTC thermistors in coils
- **Power reduction**: Dynamic power scaling
- **Cooling**: Active (fan) or passive (heatsink)
- **Maximum coil temp**: 80°C (consumer), 100°C (automotive)

## 📱 Applications

### Consumer Electronics
- Smartphones, tablets, smartwatches
- Wireless earbuds, headphones
- Laptops, e-readers, keyboards
- Gaming controllers, remote controls

### Automotive
- Electric vehicles (passenger, commercial)
- Autonomous vehicles (dynamic charging)
- E-bikes, e-scooters
- Charging robots

### Industrial
- Warehouse robots, AGVs
- Medical devices, implants
- Underwater equipment
- Harsh environments (sealed charging)

### IoT & Smart Devices
- Smart home sensors
- Security cameras
- Door locks, doorbells
- Wearable fitness trackers

## 🔄 WIA Integration

This standard integrates with:
- **WIA-INTENT**: Intent-based wireless power negotiation
- **WIA-OMNI-API**: Universal charging API gateway
- **WIA-AUTO-005**: EV charging infrastructure
- **WIA-COMM-009**: Wireless power transfer protocols
- **WIA-SEC**: Secure authentication and billing

## 🤝 Contributing

Contributions welcome! Please see our [Contributing Guide](https://github.com/WIA-Official/wia-standards/CONTRIBUTING.md).

## 📄 License

MIT License - see [LICENSE](https://github.com/WIA-Official/wia-standards/LICENSE)

## 🔗 Links

- **Website**: [wiastandards.com](https://wiastandards.com)
- **GitHub**: [github.com/WIA-Official/wia-standards](https://github.com/WIA-Official/wia-standards)
- **Documentation**: [docs.wiastandards.com](https://docs.wiastandards.com)
- **Certification**: [cert.wiastandards.com](https://cert.wiastandards.com)

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**홍익인간 (弘益人間) · Benefit All Humanity**

*WIA - World Certification Industry Association*
*© 2025 SmileStory Inc. / WIA*
*MIT License*

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**홍익인간 (弘益人間) - Benefit All Humanity** 🌍