: Universal motors, stepper motors, and single-phase induction. Available Resources and PDF Links
Synchronous machines operate at a constant speed determined by the supply frequency. m%C3%A1quinas el%C3%A9ctricas chapman 4ta pdf
The per-phase equivalent circuit allows for performance analysis. It resembles a transformer model but includes a variable resistor $R_2(1-s)/s$ which represents the mechanical load converted to electrical resistance. Máquinas Eléctricas Chapman 4ta Edición PDF: Un Recurso