Motor composition
The motor consists of a magnetic field (stator), an armature (rotor) and a commutator. In order to increase the torque, a multi-pole magnetic field is used, and there are four common magnetic fields. When current is passed through the armature coil, the entire coil will be rotated by a torque. Since the DC motor will generate a back electromotive force after being energized, which is proportional to the engine speed and inversely proportional to the torque, it can meet the requirements when the engine is started. The starting current of the starter is very large, so the starting time must be short during operation.
reduction mechanism
The drive gear of the reduction gear mechanism is engaged with the engine flywheel to start the engine, and the one-way drive mode is adopted. When the speed of the pinion on the motor is higher than the speed of the flywheel ring gear of the engine, the motor drives the engine to rotate, and when the speed of the engine is higher than that of the motor, the power transmission relationship between them is automatically released.
The deceleration starter is mainly composed of electromagnetic meshing switch, reduction gear, motor, starting gear (pinion) and one-way mesher.