Power conversion device applied to high-speed flywheel energy storage system

A power conversion device, flywheel energy storage technology, applied in the direction of output power conversion device, control system, electric variable adjustment, etc., can solve the problem of energy storage consumption of motor inductance, increased loss, and the inability to add PWM modulation signal to the switch tube drive signal Too suitable and other problems to achieve the effect of improving operating efficiency, simple and reliable structure, and improving utilization

Inactive Publication Date: 2016-08-17
JINGAOWEI ELECTRICAL CHANGZHOU CO LTD
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Problems solved by technology

[0005] Of course, compared with the full-bridge drive circuit, the half-bridge drive circuit also has certain shortcomings: (1) Due to the singleness of the winding current direction, this structure can only realize the unidirectional flow of energy, and cannot realize the four-quadrant operation of the motor ; (2) There is no freewheeling circuit in the half-bridge drive circuit, and the energy for switching off the switch tube is mainly absorbed by the RCD snubber circuit, which consumes the energy stored in the motor inductance, so the half-bridge drive circuit is not suitable for high-power applications
[0007] The half-bridge drive circuit is applied to the flywheel energy storage system, and there are several problems: (1) how

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  • Power conversion device applied to high-speed flywheel energy storage system
  • Power conversion device applied to high-speed flywheel energy storage system
  • Power conversion device applied to high-speed flywheel energy storage system

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see Figure 1-5 , the present invention provides a technical solution:

[0021] A power conversion device applied to a high-speed flywheel energy storage system, including a DC power supply U 1 , DC power supply U 1 The switch S1 for shutting off the circuit is connected in series, and the DC power supply U 1 Both ends are connected with a load R 1 , load R 1 A switch S2 for disconnecting the load is connected in series, and the load R 1 A capacit...

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Abstract

The invention relates to the technical field of motor control, in particular to a power conversion device applied to a high-speed flywheel energy storage system. The power conversion device comprises a half-bridge driving circuit, an energy feedback circuit, a bidirectional Buck-Boost conversion circuit and a wave circuit. The power conversion device has the advantages that the energy bidirectional flowing of the flywheel energy storage system can be realized; the four-quadrant operation of a high-speed flywheel energy storage motor can be realized; the energy feedback circuit is used, so that the utilization rate of energy is greatly improved; the operation efficiency of the flywheel energy storage system is improved; the structure is simple and reliable; the risk of through short circuit is avoided; the operation safety of the high-speed flywheel motor is improved.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a power conversion device applied to a high-speed flywheel energy storage system. Background technique [0002] Flywheel energy storage system is a new type of electromechanical energy conversion and storage device, which has the advantages of long service life, high conversion efficiency, strong adaptability and no pollution. It has broad application prospects. [0003] The traditional iron-core brushless DC motor is used as a flywheel energy storage motor, which can have high operating efficiency after structural optimization design, but when running at high speed, the no-load loss of the motor is often very high; at the same time, its no-load and load The unbalanced magnetic pull during operation places high demands on the bearing capacity and stiffness of the magnetic bearing system. The coreless permanent magnet brushless DC motor can overcome the above-mentioned def...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02P7/281H02P7/285
CPCH02M3/1582H02P7/281H02P7/285
Inventor 李锦庚王亚静刘凯
Owner JINGAOWEI ELECTRICAL CHANGZHOU CO LTD
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