Cobalt Output Symbols

 

 

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Magnetizer system parameters

 

Symbol

Description

Vs

Magnetizer supply voltage

C

Magnetizer capacitance

Paths

Parallel paths in winding

Ef

Total energy supplied by fixture

Esat

Energy required to saturate magnets

Ecu

Total energy in time Tp dissipated as copper loss

Hsat

Magnetic field required to saturate magnets

 

 

 

Linear and Non-linear magnetic circuit results

 

 

Symbol

Description

Am

Magnetic area of the magnet

Ag

Magnetic area of air gap

Asby

Magnetic area of stator back iron

Ast

Magnetic area of stator tooth

Arby

Magnetic area of rotor back iron

lm

Magnetic length of magnet

lg

Magnetic length of air gap

lst

Magnetic length of stator tooth

lsby

Magnetic length of stator back iron

lrby

Magnetic length of rotor back iron

Rg

Air gap reluctance

Rm

Magnet reluctance

Rst

Stator tooth reluctance

Rsby

Stator back iron reluctance

Rrby

Rotor back iron reluctance

R

Total magnetic circuit reluctance

Fc

Coil MMF

Phi

Total flux

Phig

Air gap flux

Fg

Air gap MMF

Fm

Magnet MMF

Fst

Stator tooth MMF

Fsy

Stator back iron MMF

Fry

Rotor back iron MMF

Hg

Air gap magnetic field

Hm

Magnet magnetic field

Hst

Stator tooth magnetic field

Hsy

Stator back iron magnetic field

Hry

Rotor back iron magnetic field

Bmsat

Magnet saturation flux density

Bg

Air gap flux density

Bm

Actual magnet flux density

Bsby

Stator back iron flux density

Bst

Stator tooth flux density

Brby

Rotor back iron flux density

 

 

 

Coil details

 

Symbol

Description

WireRpm

Magnet wire resistance per meter

Lcext

End turn extension per side

MLT

Mean length of turn per coil

Aslot

Slot area

Awire

Area of copper wire per slot with insulation

Acu

Area of copper wire per slot without insulation

Alin

Slot liner area per slot

Rcoil

Resistance of a coil

Rpath

Resistance of a single path

Rf

Total fixture resistance

Reff

Effective resistance including contact and diode

Slot fill

Slot fill of magnet wire per slot

Lcoil

Inductance of a coil

Lpath

Inductance of a single path

Leff

Effective fixture inductance

wn

Natural frequency of LCR circuit

zeta

Damping coefficient

Rcr

Critical fixture resistance

Damp

Over, Under, or Critically damped

 

 

 

Weight and volumes

 

Symbol

Description

V_stack

Volume of stator stack

V_mag

Volume of magnets

Wt_stack

Weight of stator stack

Wt_mag

Weight of magnets

Wt_cu

Weight of copper magnet wire

 

 

 

Performance

 

Symbol

Description

Ipath_pk

Peak current in a single path

If_pk

Peak current in fixture

Lcu_coil

Peak copper loss

Lcu_path

Peak copper loss per path

Lcu_f

Peak copper loss in fixture