41results about How to "Improve acceleration and deceleration performance" patented technology

The purpose of this invention is to simplify the train control by eliminating a switching section. In the alternating current feeding system, one sub-station of a plurality of sub-stations is provided with a first three-phase alternating current power source that has a first frequency; a transformer that is used for changing the three-phase alternating voltage from the first three-phase alternating current power source to a two-phase alternating voltage, and for connecting one of the one-phase output terminal of the two-phase output terminal to a single phase alternating current feeding electric wire; a first power converter that has an alternating current output terminal connected to M seat of the two-phase output terminal of the transformer; a second power converter that has an alternating current output terminal connected to T seat of the two-phase output terminal of the transformer; a direct current smoothing capacitor connected to a common direct current terminal of the first and second power converters; a compensation current control means for controlling a compensation current generated from the first and the second power converters; a second three-phase alternating current power source that has a second frequency; and a diode rectifier for converting the three-phase alternating current of the second three-phase alternating current power source to a direct current and feeding direct current power to the direct current smoothing capacitor.

In order to minimize a calculation load and surely obtain a maximum adhesion torque, estimated adhesion torques are always stored, an maximum value is obtained from the stored plural estimated adhesion torques immediately before slip / skid is detected when detecting the slip / skid, and the maximum value is set as a maximum adhesion torque. The maximum adhesion torque immediately before the slip / skid is detected is compared with a value of the estimated adhesion torque when the slip / skid is detected. When the calculated value exceeds a threshold value, it is determined as a condition where an adhesion coefficient drastically drops, and a suppression / return ratio of the torque is switched to a lower value than that under a condition where the adhesion coefficient does not drastically drop. The value of the torque at the time of suppression or return is set to a smaller value to surely suppress the slip / skid.

An energy converting device having an eccentric rotor includes a fixed portion and an eccentric rotor. This fixed portion has a central axis, an outer frame, and several fixed coil portions. The eccentric rotor has a bearing, a rotatory shaft, an eccentric arm, an eccentric shaft portion, a supporting plate, an inner annular magnetic portion, and an outer annular magnetic portion. The inner magnetic portion and the outer magnetic portion are concentric and aligned with the eccentric shaft portion. The eccentric shaft portion is offset from the rotary shaft. When the rotary shaft of the eccentric rotor rotates, these fixed coil portions cut through the inner magnetic portion and the outer magnetic portion repeatedly, so magnetic flux passing through the coils alternates accordingly to generate electromotive force. Conversely, it can be used as an electric motor. In addition, it can be integrated with a cycloidal speed reducer to form a motor with speed reduction and torque augmentation capability. The integrated cycloidal motor is compact, does not need a shaft coupler to transmit power from a motor to the reducer, and therefore may operate more smoothly.

The invention aims at providing a dual-shaft type gas-electric hybrid ship power system. The whole dual-shaft type gas-electric hybrid ship power system comprises a gas machine, a reversible shaft driven motor, a storage battery, a permanent magnet coupler, a clutch, a gearbox, a propeller, a natural gas storage and supply device, an inverter, a frequency converter, a rectifier and a switchboard.The dual-shaft type gas-electric hybrid ship power system is mainly characterized in that the gas machine is connected with the reversible shaft driven motor through the permanent magnet coupler; thereversible shaft driven motor is connected with the gearbox through the clutch; and the power source is the storage battery. According to the dual-shaft type gas-electric hybrid ship power system, theadopted layout of multiple energy forms can meet demands of a ship under various environments and working conditions, the operation efficiency of the gas machine and the reversible shaft driven motoris further enhanced, the fuel consumption and emission of the gas machine are effectively reduced, the power response of the ship is improved and the application range of the system is wide.

The purpose of the present invention is to provide a hybrid power system with two engines and three blades for a ship with composite energy storage, including a gas engine, a generator, an electric motor, a pod propeller, and a natural gas storage and supply device. The output of the gas engine is connected to the input of the gearbox, the input of the generator is connected to the output of the gearbox, the output of the gearbox is connected to the motor, the propeller is connected to the output of the motor, the pod propeller is connected to the ship power grid, and the power source is super Capacitors, fuel cells, generators and batteries. When the load of the system in the present invention changes, the energy can be stored or released rapidly, preventing the impact of too fast energy change on the power grid, improving the operating efficiency of gas engines, generators and motors, improving the utilization efficiency of fuel and reducing emissions, and improving the efficiency of ships. The dynamic response improves the application range of the system, and the fuel utilization rate has been further improved.