3 results about "Shunt generator" patented technology

The invention discloses a rotor shaft head assembly, a rotor assembly and a self-shunt excitation generator, the rotor shaft head assembly comprises a rotating shaft, a fan blade piece, a conductive piece and two collecting rings, the middle part of the rotating shaft is provided with a mounting hole, the conductive piece is arranged in the mounting hole in an insulating manner along the axial direction, the conductive piece is provided with two conductive rods which are mutually insulated and are arranged in parallel along the axial direction, and the two collecting rings are arranged in the mounting hole. The two collecting rings are coaxially mounted at one end of the rotating shaft in an insulating manner, the two collecting rings are axially distributed on the rotating shaft at intervals, the fan blade pieces are coaxially mounted on the rotating shaft and located between the two collecting rings, the fan blade pieces are used for dissipating heat of the two collecting rings, and communicating holes communicated with the mounting holes are formed in the positions, corresponding to the two collecting rings, of the rotating shaft. The two conducting rods correspond to the two collecting rings in a one-to-one mode, a connecting piece penetrates through each communicating hole in an insulating mode, each collecting ring is electrically connected with the corresponding conducting rod through the corresponding connecting piece, and therefore the fan blade piece can directly rotate along with the rotating shaft, and heat dissipation is directly conducted on the collecting rings on the two sides.

The present application belongs to the technical field of power application, and particularly relates to a method for phase checking of a self-shunt generator PT by using a field-changing current. The present application solves the technical problem of the existing reverse phase checking by determining the trigger angle of a three-phase full-bridge rectifier circuit and the same nature of the current change of the high-voltage side or the low-voltage side of a field-changing transformer and the voltage change of the same phase of a generator terminal, and uses the same nature as the basis for phase checking of the self-shunt generator PT. Meanwhile, the present application is simple in method, convenient in operation, accurate in phase checking, and suitable for large-scale popularization and use.

This invention discloses a dynamic coordinated control strategy for mode switching in a series-parallel diesel-electric hybrid ship, belonging to the field of marine power control technology. The strategy includes the following steps: S1, connecting the shaft-driven motor and the main engine in parallel via a gearbox, and connecting the generator set and the energy storage battery pack to the DC bus to obtain a series-parallel power system; S2, constructing a mathematical model system; S3, obtaining the optimal operating mode discrimination result by constructing fuzzy membership functions; S4, formulating target torque distribution rules and constructing a state-space model using model predictive control theory; S5, obtaining control commands by optimizing the target torque distribution result in the rolling time domain; S6, obtaining the mode switching process by controlling the clutch state, the shaft-driven motor operating mode, and the speed and torque matching of each power source. This control strategy solves the problems of difficult multi-power source coordination, large switching impact, severe torque fluctuations, and inaccurate mode discrimination during mode switching in series-parallel diesel-electric hybrid ships.