Permanently magnetically excited electric machine
An electric machine includes a stator having 48 grooves and 48 tooth coils, and a rotor interacting with the stator. The rotor has eight magnetic poles along an external circumference of the rotor in an annular arrangement, with adjacent magnetic poles defining angular distances defined successively at 41.25°, 39.75°, 41.25°, 57.75°, 41.25°, 39.75°, 41.25° and 57.75°. The angular distances have a tolerance range of 0.4°. The electric machine has a pole arc between 0.6 and 0.7.
1. An electric machine, comprising:
a stator having 48 grooves and 48 tooth coils; and
a rotor interacting with the stator, said rotor having eight magnetic poles along an external circumference of the rotor in an annular arrangement, with adjacent magnetic poles defining angular distances defined successively at 41.25°, 39.75°, 41.25°, 57.75°, 41.25°, 39.75°, 41.25° and 57.75° said angular distances having a tolerance range of 0.4°,
said electric machine having a pole arc between 0.6 and 0.7.
2. The electric machine of claim 1 , wherein the magnetic poles are formed as segment magnets.
3. The electric machine of claim 1 , further comprising flow barriers extending axially from a first axial end of the rotor to an opposing second axial end of the rotor, said flow barriers being arranged radially inwardly and centrally at a predefined distance from the magnetic poles.
4. The electric machine of claim 1 , further comprising at least one further annular arrangement comprising eight magnetic poles, wherein the magnetic poles of the annular arrangements are arranged in axial alignment.