working principle
The working principle of the transformer is based on the principle of electromagnetic induction. The transformer has two sets of coils. The primary coil and the secondary coil. The secondary coil is outside the primary coil. When the primary coil is energized with alternating current, the transformer core generates an alternating magnetic field, and the secondary coil generates an induced electromotive force. The turns ratio of the windings of the transformer is equal to the voltage ratio. For example: the primary coil has 500 turns, the secondary coil has 250 turns, the primary is connected to 220V alternating current, and the secondary voltage is 110V. The transformer can step down or step up. If the primary coil has fewer turns than the secondary coil, it is a step-up transformer, which can convert a low voltage to a high voltage.
effect
1. Ensure the safety of electricity use and meet the needs of different electrical equipment teams.
2. Use a transformer to reduce the high voltage.
3. The transformer also has the function of transforming current.
4. The transformer also has the function of transforming impedance.