Synchronous Motors: Overview
| Power supply | AC | Mains supply |
|---|---|---|
| Driver electronics need | No | |
| Speed accuracy | Low | Effected by load torque Speed at rated point about 2600 rpm at 50Hz |
| Speed control | No | |
| Position control | No | |
| Overloadablity / load inertia | Low | Little reserve to max.torque |
| Lifetime | High | Limited by bearings Depend on lateral force |
| Speed range [rpm] | 2600 | Rated speed at 50Hz |
| Efficiency | Low, about 20% | At rated point (14% at ½ rated point) |
| Power vs. size | Low | |
| Winding thermal protection | Possibly | |
| Load sensing | Medium | Current rises with load, but less than DC mot |
| Stalling permissible | Yes | If winding designed for continuous duty cycle |
| Electromag.interference EMI | Not Critical | |
| Braking/Holding torque | Very low | No permanent magnets |
| JE brand |  |
