# ⚡ WIA-COMM-009: Wireless Power Transfer Standard

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> **Standard ID:** WIA-COMM-009
> **Version:** 1.0.0
> **Status:** Active
> **Category:** COMM / 통신/네트워크
> **Color:** Blue (#3B82F6)

---

## 🌟 Overview

The WIA-COMM-009 standard defines the comprehensive framework for wireless power transfer (WPT) technologies, covering short-range inductive/capacitive coupling, mid-range resonant systems, and long-range microwave/laser power transmission. This standard enables safe, efficient, and interoperable wireless power delivery for consumer electronics, electric vehicles, industrial systems, and space-based solar power applications.

**홍익인간 (弘益人間) - Benefit All Humanity** - This standard aims to democratize wireless power technology, enabling cable-free charging infrastructure for ubiquitous energy access and sustainable electrification.

## 🎯 Key Features

- **Inductive Power Transfer (IPT)**: Near-field magnetic coupling (Qi, AirFuel)
- **Capacitive Power Transfer (CPT)**: Electric field coupling through dielectric
- **Resonant Wireless Power**: Mid-range resonant coupling (WiTricity)
- **Microwave Power Transfer**: Long-range RF beam power (rectenna)
- **Laser Power Beaming**: Optical wireless power transmission
- **EV Dynamic Charging**: Roadway wireless charging for electric vehicles
- **Space Solar Power**: Orbital power generation and wireless transmission
- **Industrial WPT**: High-power applications for robotics, AGVs, cranes
- **Safety Standards**: SAR limits, EMI/EMC compliance, foreign object detection
- **Efficiency Optimization**: Power control, impedance matching, beam steering

## 📊 Core Concepts

### 1. Power Transfer Principles

Wireless power exploits electromagnetic coupling:

#### Inductive Coupling (Near-Field)
```
P_rx = k² × Q₁ × Q₂ × P_tx
```

Where:
- `P_rx` = Received power
- `k` = Coupling coefficient (0-1)
- `Q₁, Q₂` = Quality factors of TX/RX coils
- `P_tx` = Transmitted power

#### Friis Transmission (Far-Field)
```
P_rx = P_tx × G_tx × G_rx × (λ / 4πd)²
```

Where:
- `G_tx, G_rx` = Antenna gains
- `λ` = Wavelength
- `d` = Distance

### 2. Efficiency vs Distance Tradeoff

| Technology | Range | Efficiency | Power | Frequency |
|------------|-------|------------|-------|-----------|
| Inductive (Qi) | 0-5 cm | 70-90% | 5-15 W | 80-300 kHz |
| Resonant | 10 cm-2 m | 40-80% | 1-11 kW | 6.78 MHz |
| Microwave | 1-1000 m | 10-50% | 1 W-100 kW | 2.45-24 GHz |
| Laser | 100 m-1000 km | 10-40% | 1 W-1 MW | IR/Optical |

### 3. Safety Considerations

- **SAR (Specific Absorption Rate)**: < 2 W/kg (FCC/ICNIRP)
- **EMI/EMC Compliance**: FCC Part 15, EN 55011
- **Foreign Object Detection (FOD)**: Q-factor monitoring, thermal sensing
- **Biological Effects**: IEEE C95.1 exposure limits

## 🔧 Components

### TypeScript SDK

```typescript
import {
  InductiveWPT,
  ResonantWPT,
  MicrowaveWPT,
  LaserPowerBeaming,
  EVDynamicCharging
} from '@wia/comm-009';

// Inductive charging (Qi-compatible)
const qiCharger = new InductiveWPT({
  standard: 'Qi',
  frequency: 87000, // Hz
  maxPower: 15, // Watts
  coilDiameter: 0.05, // meters
  foreignObjectDetection: true
});

// Start power transfer
const session = await qiCharger.startTransfer({
  deviceId: 'phone-12345',
  requestedPower: 10, // W
  alignment: { x: 0, y: 0, z: 0.005 } // meters
});

console.log(`Transfer efficiency: ${session.efficiency}%`);
console.log(`Power delivered: ${session.powerDelivered} W`);

// Microwave power beaming
const microwaveWPT = new MicrowaveWPT({
  frequency: 2.45e9, // Hz (2.45 GHz ISM band)
  transmitPower: 1000, // Watts
  antennaGain: 20, // dBi
  beamSteering: true
});

// Transmit power to rectenna array
const beam = await microwaveWPT.transmit({
  targetLocation: { latitude: 37.7749, longitude: -122.4194 },
  distance: 500, // meters
  powerRequired: 100 // W
});

console.log(`Beam efficiency: ${beam.efficiency}%`);
console.log(`Received power: ${beam.receivedPower} W`);
```

### CLI Tool

```bash
# Inductive power transfer (Qi)
wia-comm-009 inductive --standard Qi --power 15 --frequency 87000

# Resonant wireless power
wia-comm-009 resonant --distance 1.0 --power 3300 --frequency 6.78e6

# Microwave power beaming
wia-comm-009 microwave --frequency 2.45e9 --distance 100 --power 1000

# Laser power transmission
wia-comm-009 laser --wavelength 1064e-9 --distance 1000 --power 10000

# EV dynamic charging simulation
wia-comm-009 ev-dynamic --speed 100 --power 20000 --efficiency 85

# Calculate efficiency
wia-comm-009 efficiency --technology resonant --distance 0.5 --coupling 0.6

# Safety analysis
wia-comm-009 safety --power 1000 --distance 2 --frequency 2.45e9
```

## 📚 Documentation

| Document | Description |
|----------|-------------|
| [WIA-COMM-009-v1.0.md](./spec/WIA-COMM-009-v1.0.md) | Complete specification with wireless power theory |
| [TypeScript SDK](./api/typescript/) | Full TypeScript implementation |
| [CLI Tool](./cli/wia-comm-009.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-power-transfer

# Run installation script
./install.sh

# Verify installation
wia-comm-009 --version
```

### TypeScript Usage

```bash
# Install via npm
npm install @wia/comm-009

# Or yarn
yarn add @wia/comm-009
```

```typescript
import { WirelessPowerSDK } from '@wia/comm-009';

const sdk = new WirelessPowerSDK();

// Create resonant WPT system
const resonantSystem = sdk.createResonantWPT({
  frequency: 6.78e6, // MHz (ISM band)
  transmitterCoil: {
    diameter: 0.5, // meters
    turns: 10,
    quality: 200
  },
  receiverCoil: {
    diameter: 0.3,
    turns: 8,
    quality: 180
  },
  maxPower: 11000 // W (11 kW for EV)
});

// Calculate transfer parameters
const transfer = await resonantSystem.calculateTransfer({
  distance: 0.2, // meters
  alignment: { x: 0, y: 0, z: 0.2 },
  requestedPower: 7400 // W
});

console.log(`Coupling coefficient: ${transfer.coupling}`);
console.log(`Efficiency: ${transfer.efficiency}%`);
console.log(`Delivered power: ${transfer.deliveredPower} W`);
console.log(`Heat dissipation: ${transfer.heatLoss} W`);
```

## 🔬 Technology Types

### 1. Inductive Power Transfer (IPT)

| Standard | Frequency | Power | Range | Applications |
|----------|-----------|-------|-------|--------------|
| Qi (WPC) | 80-300 kHz | 5-15 W | 0-5 cm | Smartphones, wearables |
| AirFuel Resonant | 6.78 MHz | 5-50 W | 0-50 mm | Tablets, laptops |
| SAE J2954 (EV) | 85 kHz | 3.7-22 kW | 10-25 cm | Electric vehicles |

### 2. Resonant Wireless Power

- **WiTricity**: Mid-range resonant coupling (1-2 meters, kW-scale)
- **Applications**: EV charging, robotics, medical implants
- **Frequency**: 6.78 MHz ISM band
- **Efficiency**: 80-95% at optimal coupling

### 3. Microwave Power Transfer

- **Frequency**: 2.45 GHz, 5.8 GHz, 24 GHz (ISM bands)
- **Range**: 1 meter to kilometers
- **Rectenna**: Rectifying antenna for RF-to-DC conversion
- **Applications**: Drones, satellites, remote sensors
- **Beam Steering**: Phased arrays for tracking receivers

### 4. Laser Power Beaming

- **Wavelengths**: 808 nm, 980 nm, 1064 nm (IR), 450 nm (blue)
- **Photovoltaic Receiver**: GaAs, InGaAs, Si solar cells
- **Efficiency**: 40-60% (laser-to-electric)
- **Applications**: Space power, underwater systems, disaster relief
- **Safety**: Eye-safe wavelengths, beam interruption detection

## ⚙️ Technical Specifications

### Inductive WPT Configuration

```typescript
interface InductiveWPTConfig {
  // Standard compliance
  standard: 'Qi' | 'AirFuel' | 'SAE-J2954' | 'proprietary';

  // Electrical parameters
  frequency: number;        // Hz (e.g., 87 kHz for Qi)
  maxPower: number;         // Watts
  voltage: number;          // Volts DC

  // Coil design
  coilDiameter: number;     // meters
  coilTurns: number;
  wireDiameter: number;     // meters
  ferriteMaterial?: string; // e.g., 'Mn-Zn', 'Ni-Zn'

  // Safety & control
  foreignObjectDetection: boolean;
  thermalProtection: boolean;
  maxTemperature: number;   // Celsius
  sarCompliance: boolean;
}
```

### Microwave WPT Configuration

```typescript
interface MicrowaveWPTConfig {
  // RF parameters
  frequency: number;        // Hz (e.g., 2.45 GHz)
  transmitPower: number;    // Watts
  bandwidth: number;        // Hz

  // Antenna design
  antennaType: 'patch' | 'horn' | 'phased-array' | 'parabolic';
  antennaGain: number;      // dBi
  beamwidth: number;        // degrees
  polarization: 'linear' | 'circular';

  // Beam control
  beamSteering: boolean;
  trackingMode: 'pilot-tone' | 'retrodirective' | 'gps';

  // Rectenna receiver
  rectennaEfficiency: number; // 0-1
  rectennaDiodes: 'Schottky' | 'GaN-HEMT';

  // Safety
  maxPowerDensity: number;  // W/m²
  safetyZone: number;       // meters
}
```

## 🌐 WIA Integration

This standard integrates with:
- **WIA-OMNI-API**: Universal energy transfer API
- **WIA-INTENT**: Intent-based power requests
- **WIA-IOT**: IoT device wireless charging
- **WIA-EV**: Electric vehicle infrastructure
- **WIA-GRID**: Smart grid integration

## 📖 Use Cases

1. **Consumer Electronics**: Wireless charging pads for phones, watches, earbuds
2. **Electric Vehicles**: Stationary and dynamic (in-road) wireless charging
3. **Medical Devices**: Implant charging (pacemakers, neuromodulators)
4. **Industrial Automation**: AGV/robot charging, crane power delivery
5. **Drones/Robotics**: In-flight charging, wireless power hotspots
6. **Space Applications**: Satellite power relay, lunar base power beaming
7. **Remote Sensors**: Wireless power for IoT sensors in harsh environments
8. **Underwater Systems**: Subsea vehicle charging, sensor networks

## 🔐 Security & Safety

- **Authentication**: Secure device pairing before power transfer
- **Power Control**: Real-time feedback for optimal efficiency
- **Foreign Object Detection**: Q-factor, IR thermal imaging, capacitive sensing
- **EMI Shielding**: Compliance with FCC, ETSI, ARIB regulations
- **Biological Safety**: SAR < 2 W/kg, thermal limits per IEEE C95.1
- **Overvoltage Protection**: Automatic shutdown on fault conditions

## 📈 Performance Metrics

### Key Performance Indicators (KPIs)

- **Efficiency**: DC-to-DC power transfer efficiency (%)
- **Power Density**: W/cm² at transmitter/receiver interface
- **Coupling Coefficient**: k = M / √(L₁×L₂) for inductive systems
- **Quality Factor**: Q = ωL/R for resonant systems
- **Alignment Tolerance**: Lateral/angular misalignment tolerance
- **Charging Time**: Time to full charge for battery systems
- **Cost per Watt**: System cost normalized by power rating

## 🤝 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** 🌍