Confirming the power transformer specifications for a smart film (such as PDLC film or other electrochromic films) involves checking several key parameters to ensure compatibility and safe operation.
- Check Smart Film Voltage & Current Requirements
Operating Voltage: Most smart films (e.g., PDLC) require low-voltage AC power (typically 36V, 48V, 60V, or 110V AC).
Current Demand: Calculate the required current based on film size (e.g., ~0.1–0.5A per m² depending on film type).
Power Consumption: Verify watts per m² (usually 5–50W/m²). Our smart film power consumption: 3.6W/Square meter.
- Verify Transformer Specifications
The transformer must match:
Input Voltage: 110V/220V AC (depending on your mains supply).
Output Voltage: Must match the smart film’s required voltage (e.g., 48V AC/65V/AC).
Output Current: Must be higher than the film’s max current (e.g., if film needs 1A, use a 1.5–2A transformer for safety).
Frequency: Typically 50/60Hz (some films may require a specific frequency).
Output Type: Must be AC (unless the film requires DC, but most smart films use AC)
- Confirm Power Load Capacity
Total Power (W) = Film Area (m²) × Power per m²
Example: For 10m² of PDLC film at 10W/m², you need 100W total.
It is better to Choose a power transformer with at least 20–30% higher wattage (e.g., 120–130W for a 100W load).
- Check Safety & Certifications
Overload Protection: Prevents damage from short circuits.
Thermal Protection: Avoids overheating.
Certifications: Look for CE, UL, RoHS compliance.
- Test Before Full Installation
Measure output voltage with a multimeter to confirm stability.
Check for voltage drops under load.
Ensure no overheating after prolonged use.
- Common Mistakes to Avoid
❌ Using a DC transformer instead of AC (most smart films need AC).
❌ Undersizing the transformer (leads to overheating or failure).
❌ Ignoring inrush current (some films draw higher current at startup).
