Your shopping cart is empty! Please select the type which you want.
Home > Mall Dynamic > Exploring Step-Down Resistors: A Way To Manage Power In Electronic Devices
The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage, and the main components are the primary coil, the secondary coil and the core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for lifting voltage, matching impedance, safety isolation, etc. In the generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, the potential can be induced in the coil, in both cases, the value of the magnetic flux is unchanged, but the number of magnetic flux intersecting the chain with the coil is changed, which is the principle of mutual induction.
The so-called buck transformer is to convert the higher voltage at the input end into a relatively low ideal voltage at the output, so as to achieve the purpose of buck.
Frequency characteristics: Low frequency power supply phase number: single phase core shape :E type Cooling form: dry core structure: core windings Number: double windings Moisture proof mode: open cooling mode: natural cooling shape structure: Vertical voltage ratio :220/110 (V) Efficiency (η):95 Rated power :50-10000 (KVA)
Main step-down transformer input voltage: 460V, 380V, 220V, 400V,
Output voltage: 380V, 220V, 110V, 36V, 24V
It is the principle of electromagnetic induction, now take single-phase double-winding transformer as an example to explain its basic working principle: when the voltage is added to the primary side winding, the flowing current generates alternating magnetic flux in the iron core. These magnetic flux are called the main magnetic flux. Under its action, the two sides of the winding are respectively induced potential, induced potential formula is: E= 4.44føm
Where: E-- effective value of induced potential f-- frequency N-- number of turns Oslash; Due to the different number of turns between the secondary winding and the primary winding, the induced potential E1 and E2 sizes are also different, and the voltage size is different when the internal impedance voltage drop is omitted.
When the secondary side of the transformer is unloaded, the primary side only flows through the current of the main magnetic flux, which is called the exciting current. When the secondary side load flows through the load current, it also generates magnetic flux in the core, trying to change the main magnetic flux, but when the primary voltage is unchanged, the main magnetic flux is unchanged, and the primary side will flow two parts of the current, one part of the excitation current is used to balance, so this part of the current changes with the change. When the current is multiplied by the number of turns, this is the magnetic potential.
The transformer can convert the AC electric energy of one voltage into another voltage of the same frequency. The main components of the AC electric voltage transformer are an iron core and two windings on the iron core. The coil connected to the power supply receives AC electrical energy, which is called the coil connected to the primary winding and the load, and sends AC electrical energy, which is called the secondary winding. The voltage phasor of the secondary winding of the primary winding is U1 voltage phasor U2 current phasor I1 current phasor I2 electromotive force phasor E1 electromotive force phasor E2 turns N1 turns N2 simultaneously intersects once. The phasor of the magnetic flux of the secondary winding is φm, and the magnetic flux is called the main magnetic flux.
Mall Dynamic
