2results about How to "Solve the wiring problem" patented technology

The application discloses a standard phase belt integer slot short-pitch lap winding symmetrical 4-branch connection method, which comprises the following steps: 1) dividing positive and negative phase belts, and dividing p-pole pairs into j normal pole pairs and k special pole pairs; 2) connecting coils under the j normal pole pairs according to normal winding pitch y1; 3) performing phase-to-phase exchange on lower-layer coil edges under the k special pole pairs; and 4) recombining the upper and lower-layer coil edges under the k special pole pairs and constructing winding branches. The winding formed by the method of phase-to-phase exchange of the lower-layer coil edges can weaken high-order harmonics, the branches of each phase are completely symmetrical in electric potential and magnetic potential, and there is no circulating current between the parallel branches; the three-phase branches are also completely symmetrical; the connection problem of the short-pitch lap winding symmetrical 4-branch is solved, the advantages of the lap winding are still embodied, the copper consumption of the motor winding is significantly reduced, and the theoretical limitation that the short-pitch symmetrical 4-branch winding cannot be connected under the odd number of pole pairs is broken through.

The application discloses a phase sequence adaptive grid-connection control method and system of a chain SVG device, and the method comprises the following steps: 1) obtaining three-phase line voltage input by the SVG to obtain three-phase voltage synchronization signals; 2) taking the three-phase voltage as the input of a software phase-locked loop, and using the d and q axis components of the output voltage to judge the voltage phase sequence; if the voltage phase sequence is a negative sequence, then adjusting the voltage of any two phases to adjust the three-phase voltage to a positive sequence; 3) obtaining the data of the SVG three-phase current and the three-phase synchronization voltage when the SVG high-voltage switch is closed; 4) obtaining the corresponding line sequence relationship between the three-phase synchronization voltage and the three-phase input voltage according to the data of the SVG three-phase current and the three-phase synchronization voltage when the high-voltage switch is charged; and 5) adjusting the line sequence of the three-phase current collection signals output by the SVG, calculating three-phase modulation waves, and distributing the three-phase modulation waves to the three-phase converter chains. The application has the advantages of automatically correcting the phase sequence of the synchronization voltage, improving the debugging efficiency and the like.