7 results about "Permanent magnet linear generator" patented technology

The present invention discloses a field-weakening control strategy for a direct-drive wave power generation system based on model predictive control, belonging to the technical field of renewable energy power generation. The present invention applies the model predictive control algorithm to the direct-drive wave power generation system, takes maximizing power capture as the optimization objective, incorporates the actual physical limitations of the device into the constraints of the algorithm, predicts using the wave force data within a certain future time domain, and obtains the optimal control quantity of the wave power generation system; and adopts a stator current vector control scheme combining i d = 0 and field-weakening control, and incorporates the d-axis current into the control objective of the model predictive control algorithm. The present invention can improve the power capture performance of the direct-drive wave power generation system while satisfying the system constraints, effectively broaden the operating speed range of the permanent magnet linear generator, and improve the stability of system operation.

This invention belongs to the field of integrated development technology of offshore renewable energy, and discloses an integrated device for a fixed monopile wind turbine-oscillating buoy wave energy conversion system. It includes wind turbine equipment, an oscillating buoy wave energy conversion device, a fixed monopile foundation, a control system, and a power transmission system. The fixed monopile foundation comprises a lower wind turbine foundation, a lattice-type structure, and an upper wind turbine foundation connected in sequence; the lattice-type structure is located in the wave action zone. The oscillating buoy wave energy conversion device includes a permanent magnet linear generator, an oscillating buoy, a straight shaft, a concentrating arc plate, a buoy shield chamber, and a buoy draft control mechanism. The concentrating arc plate is arranged on the upper wind turbine foundation, and its up-and-down movement is controlled by the control system. This invention reduces the wave load on the fixed monopile wind turbine equipment under harsh sea conditions, improving the survivability and durability of the integrated equipment; simultaneously, through the oscillating buoy wave energy conversion device, it achieves wave concentration and wave energy extraction, realizing the complementary development of "wind-wave" energy in time and space.

This invention discloses a planetary roller screw-type electric cylinder as an active suspension system for automobiles, belonging to the field of automotive technology. It includes a planetary roller screw-type electric cylinder, a cylindrical permanent magnet linear generator set, springs and connecting components, and a protective sleeve assembly. The electric cylinder provides the active force to work with the springs and the stiffness of the suspension system to dampen vibrations. Relative motion occurs within the suspension system along the axial direction, and the permanent magnet linear generator converts this energy into electrical energy, which is then supplied to the electric cylinder. This invention converts the vertical bumps generated by the car while driving into electrical energy by installing the cylindrical permanent magnet linear generator in the active suspension system. This saves energy and improves driving range. Furthermore, this invention can adapt to the complex working conditions faced by automotive suspensions, and compared to currently used active suspension systems, it can effectively reduce the size of the automotive suspension.

The invention discloses a control method for inhibiting output fluctuation of a renewable energy power generation system, and belongs to the field of stability and reliability of a novel power system. Fluctuating renewable energy sources are converted into electric energy by using Archimedes wave swing AWS and a permanent magnet linear generator LPMG, a dynamic controller of the LPMG is designed to ensure that the output power of a renewable energy source power generation system is maximized, power regulation is carried out by combining a Buck-Boost buck-boost converter, and smooth output active power is realized by adopting a battery energy storage BES system. And finally, stable voltage and current are transmitted to a power grid. The strategy is very effective in adjusting the output of the renewable energy system, so that the renewable energy system can stably supply power to the power grid according to the power grid specification.

The present invention discloses an optimized control method for a permanent magnet linear generator applied to a single-degree-of-freedom direct-drive wave energy power generation system, which relates to the field of permanent magnet linear generators for wave energy power generation and is mainly used for energy conversion and efficiency improvement of wave energy power generation devices. The invention includes the following steps: S1, establishment of a mathematical model of the permanent magnet linear generator; S2, establishment of a mathematical model of the maximum wave energy capture condition; S3, parameter setting and optimized control method of the permanent magnet linear generator; the present invention improves the operation stability and power generation conversion efficiency of the motor by optimizing the structure and control method of the linear motor.

The invention discloses a built-in double-body type wave energy power generation device, belongs to the technical field of wave energy power generation, and aims at solving the problems that an existing device is difficult to deploy, low in reliability and poor in control precision. The device comprises a sealed cabin shell, a slotless cylindrical permanent magnet linear generator, an auxiliary spring, a main control circuit, an energy storage module and a sensing system. The cabin body is a vertical equal-cross-sectional-area cylinder, serves as an external floater and is fully sealed; the axial length of the primary slotless iron core outside the generator, the axial length of the secondary slotless iron core inside the generator and the axial length of the primary slotless iron core are optimized through a formula to reduce end force. The auxiliary springs are two groups of pressure springs with different rigidities, and are matched with the cross split type rotor end cover and the guide rod, so that the motion dead zone of the rotor is reduced; the sensing system comprises a grating ruler and an acceleration sensor, and the main control circuit controls and counteracts electromagnetic force and stores electricity. The device generates power through relative movement of the cabin body and the rotor, is easy to maintain and migrate, adapts to multiple ocean scenes, and can efficiently capture wave energy.

The present invention discloses a cylindrical permanent magnet linear generator based on the slamming energy of nearshore waves. The present invention includes a cylindrical housing, a housing end cover, an elastic device, a stator, a rotor, a slamming receiving device, and a waterproof device; wherein, the elastic device is sleeved on the cylinder at the inner bottom of the cylindrical housing, the housing end cover can open and cover the cylindrical housing, one end of the stator extends into the cylindrical housing, the other end of the stator extends out from the housing end cover, the rotor is located in the stator and both ends extend out from the stator, one end of the rotor is connected to the elastic device, the other end of the rotor is connected to the slamming receiving device, and the waterproof device is used for waterproofing. The structure of the present invention is simple, convenient to assemble, small in size, low in cost, small in positioning force, and can effectively improve the wave energy conversion efficiency.