High Output Ignition Coil Car Parts Ignition Coil 07K905715D For VW
AUDI
Products description
| Products name | High Output Ignition Coil Car Parts Ignition Coil |
| Part number | 07K905715D |
| Car make | For VW |
| Other car make | For Audi |
| Feature | 4 cylinder |
| Weight | 0.25KG |
| Warranty | 12 months |
| MOQ | 50PCS |
Ignition coil theory
- There are usually two groups of coils in the ignition coil, the
primary coil and the secondary coil. The primary coil is made of
thick enamelled wire, usually about 200-500 turns of enamelled wire
of about 0.5-1mm; The secondary coil is wound with fine enamelled
wire, usually about 15000-25000 turns with enamelled wire of about
0.1mm. One end of the primary coil is connected with the
low-voltage power supply (+) on the vehicle, and the other end is
connected with the switching device (circuit breaker). One end of
the secondary coil is connected with the primary coil, and the
other end is connected with the output end of the high-voltage line
to output high-voltage power.
- The reason why the ignition coil can change the low-voltage power
on the vehicle into high voltage is that it has the same form as
the ordinary transformer. The primary coil has a larger turn ratio
than the secondary coil. However, the working mode of the ignition
coil is different from the ordinary transformer. The working
frequency of the ordinary transformer is fixed 50Hz, also known as
power frequency transformer, while the ignition coil works in the
form of pulse, which can be regarded as pulse The impulse
transformer repeatedly stores and discharges energy at different
frequencies according to different engine speeds.
- When the primary coil is connected to the power supply, a strong
magnetic field is generated around with the increase of current,
and the magnetic energy is stored in the iron core; when the
switching device disconnects the primary coil circuit, the magnetic
field of the primary coil decays rapidly, and the secondary coil
will induce a high voltage. The faster the magnetic field of the
primary coil disappears, the greater the current at the moment of
current disconnection, and the higher the turn ratio of the two
coils Large, the higher the voltage induced by the secondary coil.
