Electric Motors Ara Knaian
Dec 14, 2015
Motors• Motors convert electrical energy to mechanical
energy• Motors make things move
LINEAR
ELECTROSTATIC
DC BRUSH
STEPPER
INDUCTION
UNIVERSAL
Motor Modeling
PPin
Voltage and Current In Torque and
Speed OutHeat Out
,Q
VI
Power In = Power Out
QVI
RIVI 2
Practical Motor Controller Block Diagram
Motor Mechanical System
EncoderH Bridge
Limit Switch
Microcontroller
Stepper Motor Selection
• Permanent Magnet / Variable Reluctance• Unipolar vs. Bipolar• Number of Stacks• Number of Phases• Degrees Per Step• Microstepping• Pull-In/Pull-Out Torque• Detent Torque
Electropermanent Stepper
Before Installation of Coils After Installation of Coils
Rotor
Stator
Alnico
FeNd-Fe-B Copper Wire Coil