Why is the magneto of a motorcycle called a coil (ignition coil and trigger coil) | GETWELL

Why are the ignition coils and trigger coils used in motorcycles and locomotives that everyone knows every day called magneto? The editor of Gewei Electronics will study with you.

The magneto of a motorcycle is not just called a coil. The magneto is a general term consisting of a coil, a constant magnet, and a casing. The coil cuts the magnetic field of the constant magnet and generates an electromotive force (voltage). After the circuit is connected, it can discharge the electric appliance. The coil is just An integral part of the magneto.

The motorcycle magneto trigger coil and ignition coil are not the same. If there is no trigger coil, the engine cannot catch fire. In fact, the trigger coil replaces platinum with contact ignition before, while modern ones use contactless electronic ignition.

The electronic ignition of the contact must trigger the coil to control the thyristor in the electronic igniter; the working principle of the contactless electronic ignition is rough as follows (for a general motorcycle): First, the charging coil of the magneto ignites the electronic Charger (actually charging a capacitor inside, as mentioned in junior high school physics). Generally speaking, there is a small magnet on the rotor of a magneto, and the trigger coil is installed on the stator. It is very close to the magnet, but not Contact (the reason why it is called non-contact ignition), every time the magneto rotates one circle, the small magnet will pass the trigger coil, and then the small magnet will make an angular magnetic motion with the trigger coil (this is also mentioned in junior high school), Once there is a cut-angle magnetic movement, the trigger coil will generate a weak current. After the weak current is energized to the thyristor in the electronic igniter, the thyristor will release the current stored in the capacitor to the ignition coil (that is, a transformer, Commonly known as a high-voltage package), after the current passes through the ignition coil, the voltage is increased from low voltage to tens of thousands of volts, and then the mixed gas in the cylinder is ignited by a spark plug to make the engine work; such a superficial description does not know whether the host understands the trigger coil To be simpler, the trigger coil is to control the ignition time. Without it, it is absolutely impossible. It should also be noted that there are two ignition coils on the motorcycle. The magneto has a low-voltage ignition coil. Its function is to ignite. The other ignition coil is the high-voltage package that is charged by the charger, and its function has been described above.

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