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 |