Abbreviations and Symbols

A | linear current density, [A/m] |

A | magnetic vector potential, [Vs/m] |

A | magnetic vector potential scalar value, [Vs/m] |

A | temperature class 105 °C |

AC | alternating current |

AM | asynchronous machine |

A1-A2 | armature winding of a DC machine |

A1n, A2n, A3n | factors for defining permanent magnet flux density |

a | number of parallel paths in windings without commutator: per phase, in windings with a commutator: per half armature, diffusivity |

B | magnetic flux density, vector [Vs/m2], [T] |

B | magnetic flux density scalar value, [Vs/m2] |

Br | remanent flux density, [T] |

Bsat | saturation flux density, [T] |

B | temperature class 130 °C |

B1-B2 | commutating pole winding of a DC machine |

b | width, [m] |

b0c | conductor width [m] |

bc | conductor width [m] |

bd | tooth width, [m] |

bdr | rotor tooth width, [m] |

bds | stator tooth width, [m] |

br | rotor slot width, [m] |

bs | stator slot width, [m] |

b0 | slot opening, [m] |

bv | width of ventilation duct, [m] |

C | capacitance, [F], machine constant, integration constant, fabrication cost, [€] |

C | temperature class >180 °C |

C1-C2 | compensating winding of a DC machine |

Cf | friction coefficient |

CM | torque coefficient |

Cs | saving cost per year, [€/a] |

c | specific heat capacity, [J/kgK], capacitance per unit of length, factor, divider, constant |

Cdiff | increase of the purchase cost, [€] |

ce | energy cost, [€/kWh] |

cp | specific heat capacity of air in constant pressure |

Cpw | cost per one kilowatt of loss over the life of motor, [€/kW] ... |

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