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