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Three-phase-to-five-phase double-stage matrix converter based on Z source

A technology of matrix converter and matrix converter, which is applied in the direction of conversion equipment for intermediate conversion to DC, output power conversion device, conversion equipment without intermediate conversion to AC, etc., which can solve the problem of large volume, power grid harmonics Pollution, limited service life of inverters, etc.

Inactive Publication Date: 2013-02-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of large volume of traditional five-phase voltage source inverter, low input side power factor, serious harmonic pollution to the power grid, limited service life of the frequency converter and low voltage transmission ratio of the existing matrix converter , proposed a three-phase-five-phase two-stage matrix converter based on Z source

Method used

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  • Three-phase-to-five-phase double-stage matrix converter based on Z source
  • Three-phase-to-five-phase double-stage matrix converter based on Z source
  • Three-phase-to-five-phase double-stage matrix converter based on Z source

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specific Embodiment approach 1

[0017] Specific implementation mode one: combine figure 2 with image 3 Describe this embodiment, the three-phase-five-phase two-stage matrix converter based on Z source described in this embodiment, it comprises bipolar matrix converter, and it also comprises Z source network 3,

[0018] The bipolar matrix converter is composed of a rectification stage circuit 1 and an inverter stage circuit 2; a Z source network 3 is connected in series between the rectification stage circuit 1 and the inverter stage circuit 2.

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and the three-phase-five-phase two-stage matrix converter based on Z source described in Embodiment 1 is that the rectification stage circuit 1 is composed of 6 bidirectional switches Sap, San , Sbp, Sbn, Scp and Scn are composed of a three-phase full-bridge rectifier circuit.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination Figure 4 with Figure 7 This embodiment is described. The difference between this embodiment and the Z-source-based three-phase-five-phase two-stage matrix converter described in the second embodiment is that the bidirectional switches are composed of two IGBTs and two power diodes. , the two IGBTs are connected in a common-emitter type, and each IGBT is connected in parallel with a power diode, wherein the anode of the power diode is connected to the emitter of the IGBT, and the cathode of the diode is connected to the collector of the IGBT.

[0021] Each of the bidirectional switches has bidirectional turn-on and bidirectional turn-off capabilities. However, there is no power electronic switching device that can directly realize the above functions in the market. Therefore, in the research and development of the bipolar matrix converter, it is necessary to use discrete switching devices to form a bidirectional switch. ...

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Abstract

The invention relates to a three-phase-to-five-phase double-stage matrix converter based on a Z source, which belongs to the technical field of power electronic converters and aims to overcome the problems that the traditional five-phase voltage source inverter is large in size, low in input side power factor and limited in service life of a frequency converter and causes serious pollutions to power grid harmonic waves and the existing matrix type converter is low in voltage transmission ratio. The matrix converter provided by the invention comprises a double-stage matrix type converter and a Z source network, wherein the double-stage matrix type converter is composed of a rectifier stage circuit and an inverter stage circuit; the Z source network is connected in series between the rectifier stage circuit and the inverter stage circuit; one end of a first capacitor of the Z source network is connected with one end of a first inductor to serve as a first input end; the other end of the first inductor is connected with one end of a second capacitor to serve as a first output end; the other end of the second capacitor is connected with one end of a second inductor to serve as a second input end; and the other end of the second inductor is connected with the other end of the first capacitor to serve as a second output end. The matrix converter provided by the invention is suitable for driving a five-phase motor.

Description

technical field [0001] The three-phase-five-phase two-stage matrix converter involved in the present invention belongs to power electronic converters. Background technique [0002] The advantages of polyphase AC motors (more than three phases) as variable frequency speed motors have been recognized. In addition to increasing the torque ripple frequency and reducing the torque ripple amplitude, the output power of the entire variable current speed regulation system is improved due to the increase of the total output current, and the capacity requirements for the converter power devices are also reduced. In addition, the increased number of phases is also beneficial to improve the speed regulation characteristics in the low speed area. Good fault tolerance is also a feature of this type of motor. When one or several phases of the multi-phase fail, with appropriate fault-tolerant strategies, the motor can still continue to run with derated power without shutdown or system reo...

Claims

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Application Information

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IPC IPC(8): H02M5/40H02M5/458H02M3/06
Inventor 刘洪臣于海龙王国立孙立山
Owner HARBIN INST OF TECH
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