5results about How to "Increase starting torque" patented technology

This invention relates to the field of micro-power generation technology, and more particularly to an integrated micro permanent magnet direct-drive generator. The generator includes: a duct housing, a turbine, a permanent magnet power generation unit, a flow field monitoring module, and a control unit. This invention designs the inner wall of the duct as a composite curved surface with a specific helical waveform and axial contraction, precisely matching its key shape parameters with the aerodynamic design point of the turbine. This allows the airflow to be accelerated by the Venturi effect as it passes through the duct, and further endowed with tangential momentum consistent with the turbine's rotation direction by a controllable helical bulge structure. Simultaneously, based on real-time monitoring of the outlet swirl intensity and load closed-loop control, the optimal aerodynamic matching state is dynamically maintained. Furthermore, monitoring of characteristic pressure distribution enables early warning of duct performance degradation, effectively solving the problem of reduced power generation efficiency caused by mutual interference of airflows due to the use of multiple parallel independent flow guiding mechanisms.

The utility model discloses an energy-saving fluid motor resistant to high pressure and pressure pulsation, and relates to the technical field of hydraulic motors, the energy-saving fluid motor comprises a motor body, cup-shaped blades, an output wheel shaft and a shock wave recoverer; the periphery of the output wheel shaft is connected with a plurality of cup-shaped blades; the motor body is further provided with an oil inlet channel, an oil outlet channel and a shock wave channel. The large pulse flows through a shock wave recoverer at the bottom of the shock wave channel, is boosted and stabilized and then enters a flow-aiding channel and a braking channel on the two sides; a flow-aiding control valve is connected in the flow-aiding channel, and a brake control valve is connected in the brake channel; when the flow-aiding control valve is opened, the cup-shaped blade drives the output wheel shaft to rotate under the impact of incoming flow in the oil inlet channel and the flow-aiding channel; when the brake control valve is opened, the brake channel conveys the pulsating flow subjected to pressure boosting and pressure stabilizing into the cup-shaped blades, rotation of the cup-shaped blades is hindered, and the output wheel shaft can achieve flexible semi-brake under the action of opposite torque.

This utility model provides a rotor hook-slot structure for a DC motor, including rotor hooks and rotor slots, both located on the outer circumference of the rotor and evenly arranged in a ring on the outer circumference. The rotor hooks are provided in numbers of 12, and the rotor slots are provided in numbers of 18. A wire group extends outward from the rotor hooks and winds around the rotor slots. This rotor hook-slot structure for a DC motor, by increasing the number of rotor slots to 18 (no longer corresponding to a single slot), reduces the current density in a single slot, thereby reducing the impact of armature current on the main magnetic field, helping to reduce magnetic field inhomogeneity, thus reducing sparks during electrolysis and improving commutation performance.

The application provides a single-phase capacitor-operated asynchronous motor, which comprises a stator core, a rotor core and a rotor end ring, the stator core is located at the outer periphery of the rotor core, the rotor end ring is arranged at the axial end of the rotor core, the axial height of the stator core is L1, the axial height of the rotor core is L2, the axial height of the rotor end ring is H, L2>L1 is met, and C1*L2+K1*|L1-L2|≤H≤C2*L2+K2*|L1-L2| is met, wherein 0.4≤C1≤0.6, 0.5≤C2≤0.7, 0.8≤K1≤1.0 and 0.7≤K2≤1.1. According to the application, the magnetic leakage can be reduced, the starting torque can be improved, and the motor efficiency can be improved; the problems of the single-phase capacitor-operated asynchronous motor in the prior art, such as the magnetic leakage, the insufficient starting torque and the low motor efficiency, can be effectively solved.

The invention discloses a harmonic self-starting type permanent magnet synchronous motor, which is characterized in that rotor winding coils with different pitches are utilized, induced electromotive forces generated in magnetic fields with different pole pairs generated by a stator are different in magnitude and direction, and are equivalent to access of an additional resistor, so that the rotor resistance is increased when the motor is started, and the motor has good starting performance; during normal operation, by changing the connection method of the stator winding and counteracting stator magnetomotive force harmonic waves, the motor recovers to be in a conventional motor state, at the moment, rotor resistance recovers to be normal, equivalently, additional resistance is cut off, the motor has high operation efficiency, and therefore motor starting torque can be increased without additional starting resistance by using the rotor winding. The structural characteristics of no slip ring and no brush of the motor are maintained.