Automatic Garage Door Transformers

A.  Overview
A transformer used to provide to be a suitable power source for an automatic garage door

B.  Features
The toroidal transformer used in the automatic garage door has the characteristics of large randomness of product size, single structure, high magnetic performance utilization, working voltage pull down voltage drop amplitude is small when having instantaneous high-current draw withinin a short period of time, relatively low temperature rise, and relatively high working efficiency. And has a good cost performance.

C.  Design Considerations
1.  High work efficiency
2.  Small Small Low voltage drop
3.  High magnetic saturation voltage
4.  Thermal protection
5.  Low vibration and noise
6.  International Power Transformer Safety Standard
7.  Power Wattage ranging from 10VA to 10KVA

D.  Temperature resistance and product temperature rise
Typically we design that over ambient of 25°C, product temperature rise is as follows:
1.  Class A: 105°C, Temperature rise below 60°C
2.  Class B 130°C, Temperature rise below 75°C
3.  Class F 155°C, Temperature rise below 95°C
4.  Class H 180°C, Temperature rise below 125°C
5.  Or suitable temperature grade and suitable temperature rise

E.  Compliance Standard
IEC61558

F.  Design required parameters
1.  Input voltage (V)
2.  Working frequency (Hz)
3.  Output voltage (V)
4.  Output current (A) or output power (W)
5.  Transformer installation space
6.  Transformer installation and connection method
7.  Requirements of temperature resistance level, efficiency, power consumption