Model of a DC Machine with permanent
magnets.
Armature resistance and inductance are modeled directly after the
armature pins, then using a AirGapDC model. Permanent
magnet excitation is modelled by a constant equivalent excitation
current feeding AirGapDC. The machine models take the following
loss effects into account:
No saturation is modelled.
Default values for machine's parameters (a realistic
example) are:
stator's moment of inertia | 0.29 | kg.m2 |
rotor's moment of inertia | 0.15 | kg.m2 |
nominal armature voltage | 100 | V |
nominal armature current | 100 | A |
nominal speed | 1425 | rpm |
nominal torque | 63.66 | Nm |
nominal mechanical output | 9.5 | kW |
efficiency | 95.0 | % |
armature resistance | 0.05 | Ohm at reference temperature |
reference temperature TaRef | 20 | °C |
temperature coefficient alpha20a | 0 | 1/K |
armature inductance | 0.0015 | H |
armature nominal temperature TaNominal | 20 | °C |
armature operational temperature TaOperational | 20 | °C |