5results about How to "Increase rated power" patented technology

The utility model discloses a plane loudspeaker with a box body, and relates to the technical field of loudspeakers. The front side of the box body is provided with an opening; the basin frame is erected in the box body and faces the opening direction, and a magnet assembly is arranged on the basin frame; and the vibrating plate sound basin is erected on the front side of the basin frame, and a voice coil matched with the magnet assembly is arranged on one side, close to the basin frame, of the vibrating plate sound basin. A mounting hole is formed in the middle of the frame, and the magnet assembly is clamped in the mounting hole; the magnet assembly comprises U iron, a first magnet, a washer and a second magnet, the U iron is clamped in the mounting hole, and a cavity is formed in the front side of the U iron; the first magnet, the washer and the second magnet are sequentially installed in the cavity from back to front. The peripheral side of the vibration plate sound basin is provided with a dangling edge, and the vibration plate sound basin is erected on the basin stand and the opening side of the box body through the dangling edge in an adhesion mode to form a closed sound cavity with the box body. According to the technical scheme, the sound box has the advantages of being provided with the box body, high in sensitivity, rich in sound details and high in sound quality.

The invention provides a current converter system of a wind generating set, the wind generating set and an offshore wind farm, the current converter system comprises a voltage source type current converter and a current source type current converter, the voltage source type current converter and the current source type current converter are connected in parallel between the output side of a generator of the wind generating set and a grid connection point, and the current source type current converter is connected in parallel between the output side of the generator of the wind generating set and the grid connection point. The voltage source type current converter comprises a first machine side current converter and a first network side current converter which are connected in sequence, and the current source type current converter comprises a second machine side current converter and a second network side current converter which are connected in sequence; the current converter control device is configured to control the operation of the voltage source type current converter and the current source type current converter by considering the internal circulation of the wind generating set in the voltage outer loop control of the voltage source type current converter and considering the internal circulation in the active power and reactive power control links of the current source type current converter, the internal loop current is determined based on an output current of the first grid-side converter and an output current of the second grid-side converter.

The utility model discloses a rotor assembly for motor, motor and vehicle relates to motor technical field, and rotor assembly includes: the pivot, and the pivot forms first cooling runner, a plurality of first laminated sheet all are set in the pivot, and the first laminated sheet forms the magnetic steel groove for installing magnetic steel, the second laminated sheet is set in the pivot, and the second laminated sheet is equipped with between at least two first laminated sheets, and the second laminated sheet forms second cooling runner, and second cooling runner communicates first cooling runner and magnetic steel groove. Through setting second cooling runner, and second cooling runner communicates first cooling runner and the magnetic steel groove of adjacent first laminated sheet, can make the cooling medium in first cooling runner flow into magnetic steel groove through second cooling runner, is favorable to the cooling medium and can directly cool the magnetic steel assembled in magnetic steel groove to improve the rated power of motor, can also reduce the risk of thermal demagnetization of magnetic steel temperature too high to reduce the risk of motor thermal failure, improve the working reliability of motor.

The invention relates to a water floating type vertical axis wind turbine which comprises a wind turbine main shaft and wind turbine blades arranged on the periphery of the wind turbine main shaft, the wind turbine main shaft is vertically arranged, the wind turbine further comprises a water pool located below an installation foundation, and the wind turbine main shaft penetrates through the installation foundation and then is inserted into the water pool. A first gap is directly reserved between the bottom of the wind turbine main shaft and the bottom of the water tank; buoyancy provided by liquid in the water pool to the wind turbine spindle counteracts gravity of the wind turbine spindle so as to reduce resistance of the wind turbine spindle during rotation. Compared with the prior art, the bottom of the main shaft is arranged in the water pool below the installation foundation, the gravity of the main shaft of the wind turbine can be balanced through buoyancy provided by liquid in the water pool, and therefore the rotation resistance of the main shaft of the wind turbine is reduced; the problem that the power generation efficiency is reduced due to resistance increase caused by size increase is solved.