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Three phase four bridge arm matrix type converter having excitation function

A matrix converter, three-phase four-bridge technology, which is applied to conversion equipment that can be converted to DC without intermediate conversion, converts irreversible AC power input into DC power output, and controls generators through magnetic field changes. Solve the problems of reducing system reliability, increasing system volume, weight, increasing system complexity and cost, and achieving the effect of reducing excitation loss, improving system efficiency, and simplifying system design

Inactive Publication Date: 2009-04-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

At present, most AC synchronous motor control systems are designed independently of the excitation winding regulation circuit and the main power conversion circuit, which not only increases the volume and weight of the system, but also increases the complexity and cost of the system and reduces the system cost. reliability

Method used

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  • Three phase four bridge arm matrix type converter having excitation function
  • Three phase four bridge arm matrix type converter having excitation function
  • Three phase four bridge arm matrix type converter having excitation function

Examples

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Embodiment Construction

[0011] Such as figure 1 As shown, a three-phase four-leg matrix converter with excitation function includes a hybrid excitation synchronous motor 1, a three-phase four-leg matrix converter 2 and a clamp protection circuit 3, wherein: a hybrid excitation synchronous motor 1 The three-phase output terminals of the three-phase four-leg matrix converter 2 are respectively connected to the three-phase input terminals of the three-phase four-leg matrix converter 2 and the three-phase input terminals of the clamp protection circuit 3, and the first to third three-phase four-leg matrix converter 2 The output terminals of the bridge arms are respectively connected to the three-phase output terminals of the clamp protection circuit 3, and respectively connected to the three-phase electrical network or the three-phase load, and the output terminal of the fourth bridge arm of the three-phase four-arm matrix converter 2 is connected to the hybrid excitation The input end of the excitation ...

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Abstract

The invention discloses a three-phase four-bridge arm matrix typed converter with an excitation function, belonging to the field of power converter. The structure of the converter mainly comprises a hybrid excited synchronous motor, a three-phase four-bridge arm matrix-typed converter and a clamp protection circuit. The converter uses the fourth bridge arm output terminal of the three-phase four-bridge arm matrix-typed converter to be connected with the input terminal of the excitation winding of the hybrid excited synchronous motor, the output terminal of which is connected in parallel with the fixed end of a bidirectional selection switch between the clamp protection circuit buses so as to form the excitation circuit, thus realizing the integral design of the power converter and the excitation circuit. In the invention, the converter not only has the advantages of traditional three-phase AC-AC matrix converter, but also realizes the motor excitation control, thereby reducing the excitation loss of the system and improving the efficiency of the system at the same time.

Description

technical field [0001] The invention relates to a matrix converter, in particular to a three-phase four-arm matrix converter with an excitation function, and belongs to the field of power converters. Background technique [0002] An AC motor is a motor that converts electrical energy into mechanical energy. The electric energy used in industry, agriculture and daily life is generally supplied by synchronous generators. When synchronous motors are running, the output voltage of the motor is related to the magnetic field of the motor. By adjusting the excitation magnetic field, the output voltage of the motor can be controlled. In the electric excitation synchronous motor, in addition to the armature winding, there is also a set of excitation winding. By adjusting the excitation current flowing in the excitation winding, the excitation magnetic field can be adjusted conveniently, so as to realize the control of the output voltage of the motor. The excitation of this type of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/22H02M7/12H02P9/00H02P9/14
Inventor 姜田贵周波史明明毛怡然
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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