Dimar Electric
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Ignition coil
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The ignition coil is divided into two types based on the magnetic circuit: open magnetic type and closed magnetic type. The traditional ignition coil uses the open magnetic type, with its core made of silicon steel sheets stacked to about 0.3 mm, and both secondary and primary coils wound around the core. The closed magnetic type uses a core shaped like a III, with the primary coil wound around it and the secondary coil wound outside, forming a closed magnetic circuit with the magnetic lines created by the core. The advantages of the closed magnetic ignition coil are less magnetic leakage, lower energy loss, and smaller size, which is why electronic ignition systems commonly use closed magnetic ignition coils.
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