Starter motor
Starter motor, which generate power from the DC motor, the starter gear to transmit power to the flywheel ring gear to drive the flywheel, the crankshaft rotation and start the engine.
Starter in accordance with works divided into DC starter, starter fuel, compressed air starter and so on. Most of the current internal combustion engine is used on the DC starter, which is characterized by compact structure, simple operation and easy maintenance. Gasoline is a starter clutch and gearshift mechanism with a small gasoline engine, big power and less affected by temperature, may start large internal combustion engine, and applies to the alpine zone. Compressed air starter is currently divided into two categories, one is working in accordance with the order of the compressed air into the cylinder, is to use the air motor driven flywheel. The use of compressed air starter starter close to gasoline, usually used for large internal combustion enginestarting.
DC is a DC series wound starter motor, clutch and control mechanism composed of institutions. It is designed to start the engine, need a strong torque, and therefore the amount of current through a large, reach hundreds of amperes.
DC motor torque at low speed, high speed when the torque becomes smaller, it is suitable to start with motivation.
DC series wound starter motor, the rotor and stator parts are relatively thick with a rectangular cross-section copper wire; reduction gear drive mechanism using the structure; control mechanism using electromagnetic magnetic way.
Motor by the magnetic field (the stator), the armature (rotor) and the commutator form, in order to increase the torque multi-pole magnetic field, there are four common magnetic field. When the current through the armature coil, the coil will be a torque and rotation. As the DC motor power will produce a counter-electromotive force, and with the engine speed is proportional to the torque is inversely proportional to, so they can meet the requirements of engine starting. Great starter starting current, therefore, the operation start-up time must be short.
Body characteristics
P11C engine starter gear has the following salient features:
① electric power output structure is divided into two parts, pivot and drive shaft. Ends with a ball bearing pivot power, load distribution, using a long time, easy to wear, armature short, less prone to electrical pivot bending, grinding bad case of the field winding.
② with a deceleration device, between the rotor and starter gear, reduction gear is installed, start the motor torque transfer to the starting gear will increase. Electromagnetic switch, making the commitment to the motor (via reduction gear after) the power output is the starter gear and starter gear shaft, and meshing control part does not move. Output power of a small starter, often with external meshing, output power within the large starter gear used method.
③ slow starter electromagnetic switch control, some with auxiliary switch (or vice switch). Its role is to prevent burn electromagnetic switches and switches (start) switch. Classification power, greatly reducing the possibility of damage to the starter, thus extending the life of the starter.
④ slow starter size and weight of about half of the traditional starter, saving raw materials, and easy disassembly repair.
⑤ slow starter number of pole pairs, like the traditional starter, but a small magnetic coil winding wire is often used method of multi-root series, armature winding around the law, although the same principles with the traditional, but advanced manufacturing technology.