 
 <prompt> How long the rotor go remain magnetized? Given di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```Finally, hysteresis synchronous motors dey usually be (essentially) two-phase motors with one phase wey get capacitor wey dey shift phase. Dem dey start like induction motors, but when slip rate reduce reach small, the rotor (wey be smooth cylinder) go come dey magnetized temporarily. The poles wey dey distributed make am dey act like PMSM. The material of the rotor, like common nail, go dey magnetized, but e fit also dey demagnetized small time. Once e start to run, the rotor poles go dey stay for one place; dem no dey move.``` 