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Flywheel energy storage system

A technology of flywheel energy storage and inertial flywheel, which is applied in the direction of controlling mechanical energy, electrical components, electromechanical devices, etc., can solve the problems of single output voltage, charging and discharging cannot be carried out at the same time, and achieve the goal of improving power density, energy density and reliability Effect

Active Publication Date: 2018-08-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing flywheel energy storage device has a single output voltage and the charging and discharging cannot be carried out simultaneously, and proposes four kinds of flywheel energy storage systems

Method used

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specific Embodiment approach 1

[0037] Specific implementation mode one: combine Figure 1 to Figure 7 Describe this embodiment, the first flywheel energy storage system described in this embodiment includes an input inverter, an output rectifier, an axial magnetic field multiple stator permanent magnet synchronous motor 2 and an inertial flywheel 4;

[0038] In the motoring state, the axial magnetic field multi-stator permanent magnet synchronous motor 2 inputs electric energy through the input inverter, and converts the electric energy into mechanical energy of the inertial flywheel 4;

[0039] In the power generation state, the inertia flywheel 4 provides mechanical energy to the axial magnetic field multiple stator permanent magnet synchronous motor 2, and outputs electric energy through the output rectifier;

[0040] The inertial flywheel 4 rotates synchronously with the rotor of the axial magnetic field multiple stator permanent magnet synchronous motor;

[0041] The axial magnetic field multiple stat...

specific Embodiment approach 2

[0058] Embodiment 2: The second flywheel energy storage system described in this embodiment includes an input inverter, an input motor, an output rectifier, an output generator, and an inertial flywheel 4;

[0059] The output terminal of the input inverter is connected to the lead wire of the stator winding of the input motor, and the input end of the output rectifier is connected to the lead wire of the stator winding of the output generator;

[0060] The output generator has j sets of stator windings, j is a natural number greater than or equal to 1;

[0061] The phase number of the output motor winding is greater than or equal to the phase number of the input motor winding;

[0062] The input motor is coaxially connected with the output generator;

[0063] The inertia flywheel 4 is sleeved on the outer circumference of the output generator or the inertia flywheel 4 is coaxially connected with the rotor of the output generator.

[0064] In this embodiment, the output recti...

specific Embodiment approach 3

[0065] Embodiment 3: The third flywheel energy storage system described in this embodiment includes an input inverter, a permanent magnet synchronous motor, 1+j output rectifiers and an inertial flywheel 4;

[0066] There are 1+j sets of AC windings with the same number of phases on the stator of the permanent magnet synchronous motor. After the corresponding phases of the remaining j sets of windings are connected in series, the tail end is connected to the head end of the corresponding phase of the first set of windings, and the 1+j output rectifiers are respectively connected to the lead-out lines of each series connection point and the head end of the last set of windings lead-out line connected;

[0067] The inertia flywheel 4 is sleeved on the outer circumference of the permanent magnet synchronous motor or the inertia flywheel 4 is coaxially connected with the rotor of the permanent magnet synchronous motor.

[0068] In this embodiment, the output rectifier is an uncon...

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Abstract

The invention relates to a flywheel energy storage system, and belongs to the field of a motor and is used for solving the problems that a traditional flywheel energy storage device is single in output voltage and charging and discharging cannot be simultaneously performed. In an electric state, an axial magnetic-field multi-stator permanent-magnet synchronous motor is used for inputting electricenergy by an input inverter; in a power generation state, an inertia flywheel is used for providing mechanical energy for the axial magnetic-field multi-stator permanent-magnet synchronous motor, andthe inertia flywheel and a rotor of the axial magnetic-field multi-stator permanent-magnet synchronous motor synchronously rotate; a stator of the axial magnetic-field multi-stator permanent-magnet synchronous motor comprises i input stators and j output stators, a rotor comprises (i+j+1) rotor discs or (i+j-1) rotor discs, and the stators and the rotor discs are sequentially arranged at intervalsalong an axial direction; a yoke plate is in a round disc shape, a permanent magnet is axially magnetized, and an N pole and an S pole of the permanent magnet are fixedly arranged on the yoke plate;and the input inverter and an outpour rectifier are simultaneously connected with the axial magnetic-field multi-stator permanent-magnet synchronous motor. The flywheel energy storage system has the beneficial effects that the output voltage is not limited, and charging and discharging can be simultaneously performed.

Description

technical field [0001] The invention belongs to the field of motors. Background technique [0002] The flywheel energy storage system uses a high-speed rotating flywheel to store energy, and realizes the mutual conversion of mechanical energy and electrical energy through an electromechanical energy conversion device. Based on its high power density, high energy density, high conversion efficiency between electrical energy and mechanical energy, fast charging speed, maintenance-free and good performance-price ratio, high-speed flywheels are used in electric vehicles, aerospace, and power grid peak regulation. , uninterrupted power supply of wind power generation system and military and other fields have broad application prospects. [0003] figure 1 Shown is a schematic structural diagram of an existing high-speed flywheel energy storage device, which mainly includes a flywheel A6, a vacuum chamber A7, a magnetic bearing A1, a brushless motor stator A4, a brushless motor r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/02
CPCH02K7/025Y02E60/16
Inventor 寇宝泉张浩泉董刘宏
Owner HARBIN INST OF TECH
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