Rotor and Motor having the same

Abstract

Provided is a rotor including a first rotor body including a first protrusion protruding from an outer circumferential surface thereof and a second rotor body stacked on and coupled to the first rotor body and including a second protrusion disposed at a position different from the first protrusion with respect to a circumferential direction and protruding from an outer circumferential surface thereof, wherein a height of the first protrusion is formed to be greater than a height of the first rotor body, and a height of the second protrusion is formed to be greater than a height of the second rotor body. The rotor is formed so that coils are wound around the respective protrusions that are divided and have relatively wide winding spaces unlike a rotor integrated with protrusions around which coils are wound, thereby increasing a coil space factor and providing an effect of facilitating a winding task.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 2015-0061433 filed on Apr. 30, 2015, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a rotor and a motor having the same, and more particularly to a rotor wound by a coil and a motor having the same. Background technique [0004] Generally, a vehicle includes a starter motor that drives an engine and an alternator that generates electric power using rotational force of the engine. The starter motor has an ignition switch which is connected to a battery power source by a driver's operation when the vehicle is started, then power is supplied to the starter motor, the engine is rotated by driving force generated by the starter motor, and thus the vehicle is started. [0005] In comparison, an alternator is connected to a driving unit of an engine to form a ...

AI Technical Summary

Problems solved by technology

[0009] However, to increase the torque of the motor must increase the number of coils or increase the current

However, in the case of BSG, there is a problem in that increase in motor torque is limited since increasing the number of wound coils is limited due to space constraints and increasing current is also limited due to current limit

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