Maximum Wireless Charging Distance: Technical Analysis

Understanding the technical aspects of wireless charging distance capabilities is crucial for optimal implementation. The InvisQi wireless charger demonstrates advanced range capabilities through various materials, with performance characteristics determined by specific technical factors.

Technical Specifications

1. Operating Parameters

Key technical metrics:

• Operating frequency: 115-135kHz
• Power output: 7.5W (Apple) / 10W (Samsung)
• Maximum distance: 30mm (1.18 inches)
• Optimal range: 18-20mm (0.7-0.8 inches)

2. Performance Metrics

Efficiency measurements:

• Peak efficiency: <80% at optimal range
• Power transfer rate: 5V/2A standard
• Coil diameter: 60mm outer, 23mm inner
• Field strength distribution: 20mm effective area

Material Analysis

1. Material Impact Data

Performance through materials:

• Wood: 98% signal penetration
• Glass: 95% signal penetration
• Stone: 85-92% depending on density
• Composites: 90-95% based on composition

2. Density Effects

Material density impact:

• Low density (<1.0 g/cm³): Minimal loss
• Medium density (1.0-2.0 g/cm³): 5-10% loss
• High density (>2.0 g/cm³): 10-15% loss
• Metal content: Complete signal blocking

Performance Analysis

1. Distance vs. Efficiency

Efficiency correlations:

• 0-10mm: 90-95% efficiency
• 11-20mm: 80-89% efficiency
• 21-30mm: 70-79% efficiency
• >30mm: Rapid efficiency decline

2. Power Delivery Analysis

Power output variations:

• Direct contact: Maximum output
• 18-20mm: Optimal MagSafe performance
• 21-30mm: Reduced fast charging capability
• Temperature correlation factors

Implementation Data

Commercial implementation analysis shows:

1. Installation Metrics

Critical measurements:

• Optimal mounting depth: 18-20mm
• Temperature range: 0-40°C
• Power supply requirements: 24V/1.0A
• EMF safety margins: Within FCC limits

2. Performance Variables

Key performance factors:

• Surface uniformity impact
• Environmental interference levels
• Power supply stability
• Heat dissipation rates

Technical Optimization

1. Signal Enhancement

Optimization techniques:

• Coil alignment precision: ±2mm
• Power supply stabilization
• EMF shielding methods
• Heat management systems

2. Efficiency Improvements

Enhancement methods:

• Resonant frequency tuning
• Impedance matching
• Field focusing techniques
• Thermal optimization

Technical Standards

1. Certification Requirements

Regulatory compliance:

• Qi certification specifications
• FCC electromagnetic compliance
• CE safety standards
• RoHS requirements

2. Testing Protocols

Verification methods:

• Distance verification techniques
• Power transfer efficiency testing
• Temperature monitoring protocols
• Safety verification procedures

Conclusion

Technical analysis confirms optimal wireless charging performance at 18-20mm, with viable operation up to 30mm under ideal conditions. Material density and composition significantly impact efficiency, while proper installation and optimization techniques can maximize performance within these technical constraints.