| 摘要 |
FIELD: electricity. ^ SUBSTANCE: invention relates to electrical engineering and may be used, for example in automatics diagrams, domestic appliances, for kitchen machines, time relays and micro pumps etc. Synchronous self-starting motor includes cylindrical rotor represented with magnetised diametrically permanent magnet and stator with two exciting coils from single-phase energy source and step-like polar surfaces. Exciting coil leads are connected to one of the electric power source poles through triple diode controlled by rotor position sensor (RPS). During startup signaling element of RPS is moved away from sensitive elements to the angular distance equal to alpha and pi-alpha angles of stator and rotor pole axes crossing, when rotor is in fixed position. Angle alpha is equal to 0.3-0.5 of angular distance of stator surface stage arc creating minimal air clearance with rotor surface. Sensitive elements of RPS are implemented as receiver and optically coupled isolator radiator. Cylinder with signaling element is installed between the above receiver and optically coupled isolator radiator and on the rotor shaft. The cylinder with signaling element is represented as either connection plate of transparent and light-proof semi-cylinder or Hall generators. Permanent magnet with signaling element coinciding with magnet neutral axis is installed between Hall generators and on rotor shaft. ^ EFFECT: improvement of startup reliability. ^ 3 cl, 2 dwg |
