Technical Knowledge Centre · 03

Motors and Drives

A technology-independent overview of motor families, power-electronic control and mechanical transmission within complete motion systems.

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Industrial motor gearbox stepper and matched drive technologies arranged as a coherent motion system

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Begin with the subject closest to the decision you need to make. Move over a card to see the practical engineering value, then continue to the detailed evidence below.

01

AC Induction Motors

Established robust technology for fixed- or variable-speed industrial duties.

Engineering checks
  • Mains or inverter operation
  • IEC and NEMA mechanical conventions
  • Wide power and mounting coverage
  • Consider converter duty and cooling
02

Permanent-Magnet DC Motors

Brushed DC technology provides straightforward speed control and strong starting torque.

Engineering checks
  • Simple DC supply or controller
  • Linear torque-current behaviour
  • Brush and commutator maintenance
  • Compact geared configurations
03

BLDC and PMSM

Electronic commutation supports efficiency, controllability and long service life.

Engineering checks
  • Trapezoidal or sinusoidal control
  • Hall, encoder, resolver or sensorless feedback
  • High power density potential
  • Motor-drive matching is essential
04

EC and Integrated Motors

Integrated electronics can simplify installation and provide efficient variable-speed control.

Engineering checks
  • External- or internal-rotor forms
  • Integrated or adjacent control electronics
  • Analogue, digital or network interfaces
  • Thermal interaction of motor and electronics
05

Servo and Stepper Systems

Motion-control systems selected around response, accuracy, repeatability and holding requirements.

Engineering checks
  • Closed-loop servo dynamics
  • Open- or closed-loop stepper operation
  • Feedback resolution and tuning
  • Load inertia and mechanical resonance
06

Gearing and Complete Motion

Gearboxes, brakes, wheels, transaxles and direct drives reshape the motor requirement.

Engineering checks
  • Ratio, efficiency and backlash
  • Output torque and speed
  • Radial/axial load capability
  • Integrated assembly and lifecycle support

Engineering note

Apply General Knowledge with Model-Specific Evidence

Technology should follow the application. SDT evaluates the complete technical, operational, production and commercial requirement before recommending a route.

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