Comparative Advantages of AC Motors and Gearmotors

Comparative Advantages of AC Motors and Gearmotors
 
Depending on winding design and other features, there are many different types of AC motors and gearmotors. This matrix was developed to help you better understand the capabilities, advantages, and disadvantages of the numerous AC motors and gearmotors offered by Bodine Electric Company.
Motor winding ~ Speed tolerance Typical rated speeds at 60Hz Start/Stop frequency Coast without brake Coast with dynamic braking Starting torque (% of rated torque) Pros Cons
Split Phase (SI) +/-3% 1700-1750
(4-pole)
3450
(2-pole)
Up to 6 per hour 20 to 600 revolutions 0.5 to 6 revolutions 175% and up No capacitors Switch life 50k to 250k starts
Permanent Split Capacitor (CI) +/-3% 1700-1750
(4-pole)
3450
(2-pole)
Up to 10 per minute 20 to 600 revolutions 0.5 to 6 revolutions 90 to 100% Very reliable, Low starting current Low starting torque
Three Phase (PP, Non-synchronous) +/-3% 1700-1750
(4-pole)
3450
(2-pole)
Up to 10 per minute 20 to 600 revolutions 0.5 to 6 revolutions 200 to 400% Most reliable and efficient, No cap/switch Requires three-phase power supply
Reluctance Synchronous Split Phase (SY) near 0% 1800
(4-pole)
3600
(2-pole)
Up to 6 per hour 20 to 600 revolutions 0.5 to 6 revolutions 110 to 150% Same as split-phase, plus exact speed Switch life 50k to 250k starts
Reluctance Synchronous Capacitor (YC) near 0% 1800
(4-pole)
3600
(2-pole)
Up to 10 per minute 20 to 600 revolutions 0.5 to 6 revolutions 80 to 100% Exact speed, Very reliable, Low starting current Low starting torque
Reluctance Synchronous Three Phase (YP) near 0% 1800
(4-pole)
3600
(2-pole)
Up to 10 per minute 20 to 600 revolutions 0.5 to 6 revolutions 200 to 500% Exact speed, Most reliable and efficient, No cap/switch Requires three-phase power supply
Brushless DC (BLDC) near 0% 2500 Up to 10 per minute 20 to 600 revolutions 0.5 to 6 revolutions 175% and up Exact speed control Requires a control board
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