Overview of the control modes

Principle

Voltage
controlled
according to characteristic curve

Field-oriented,
voltage-controlled,
stator flux controller,
torque controller

Field-oriented,
current controller

Motor

ASM/LSPM

ASM

ASM

SM

Encoder

Without

Without

With

Without

Dynamics

+

+++

++++

++

Energy efficiency

+

+++

+++

++++++

Speed control

Open-loop speed control

Torque control

–

Positioning

–

–

–

Flying start

– DC braking

Typical applications

Group drives, multi-motor drives

General materials handling technology, horizontal drives, vertical drives, pumps/fans, winding drives

Horizontal
materials handling technology

Characteristics

Maximum robustness

Maximum precision

Maximum
energy efficiency