The working principle of a transformer is based on the law of electromagnetic induction, using an alternating magnetic field to increase or decrease voltage. The specific process is as follows:
Electromagnetic induction: When alternating current passes through the primary coil (input side), it generates an alternating magnetic field, which is transmitted to the secondary coil (output side) through the iron core.
Voltage Conversion: According to Faraday's law of electromagnetic induction, the electromotive force induced in the secondary coil is proportional to the number of turns in the coil. If the secondary coil has more turns than the primary, the output voltage increases (a step-up transformer); conversely, it decreases (a step-down transformer).
Energy Transfer: In an ideal transformer, the input power equals the output power (ignoring losses), so the voltage and current are inversely proportional.
Key Features:
Core Function: The core, made of high-permeability silicon steel sheets, concentrates magnetic flux, reduces magnetic leakage, and improves efficiency.
Loss Control: This includes copper losses (resistive heating of the coil) and iron losses (hysteresis and eddy currents). Modern transformers reduce these losses through layered cores and cooling designs. Application Scenarios: Power systems (boosting voltage for long-distance transmission, stepping down voltage at the user end), electronic equipment (adapters, signal isolation), etc.
Notes:
The rated voltage/current must be matched. Overloading may cause overheating or insulation failure.
Insulation resistance should be regularly tested (e.g., the standard requires ≥100MΩ @ 500Vdc) to prevent the risk of breakdown. These transformers are now available in our stores. Our transformers support multiple current inputs (1A/5A), high insulation resistance (100MΩ @ 500Vdc), and offer flexible Ethernet interface configurations, making them suitable for demanding applications such as main transformers. Please contact us to find the best solution for you.