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Space vector modulation method for suppressing common mode voltage outputted from three-level inverter

A technology of space vector modulation and three-level inverter, which is applied in the direction of output power conversion device, conversion of AC power input to DC power output, electrical components, etc., and can solve the problem of high common-mode voltage amplitude

Inactive Publication Date: 2016-10-12
NAN TONG HUAWEI POWER EQUIP CO LTD
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  • Application Information

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Problems solved by technology

However, due to the traditional SVPWM control method using small vectors in pairs, the output common-mode voltage amplitude is relatively high

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  • Space vector modulation method for suppressing common mode voltage outputted from three-level inverter
  • Space vector modulation method for suppressing common mode voltage outputted from three-level inverter
  • Space vector modulation method for suppressing common mode voltage outputted from three-level inverter

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[0022] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] Please refer to figure 1 , this embodiment provides a space vector modulation method for suppressing the output common mode voltage of a three-level inverter, comprising the following steps:

[0025] Select the output common-mode voltage amplitude as V dc The base vector of / 6 and 0 synth...

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Abstract

The invention discloses a space vector modulation method for suppressing common mode voltage outputted from a three-level inverter, comprising the following steps: selecting base vectors whose output common mode voltage amplitudes stand at V<dc> / 6 and 0 and synthesizing the base vectors into a reference voltage vector; and taking the reference voltage vector as the output voltage space vector of the inverter wherein V<dc> is the voltage value on the DC side of the inverter. According to the invention, the space vector modulation method for suppressing common mode voltage outputted from three-level inverter synthesizes the reference voltage vector through the use of base vectors whose output common mode voltage amplitudes stand at V<dc> / 6 and 0, and controls the absolute value of the output common mode voltage amplitude below V<dc> / 6, which solves the problem that in the traditional algorithm, the output common-mode voltage amplitude is usually high and the calculation process is complex.

Description

technical field [0001] The present disclosure generally relates to the technical field of inverters, specifically to the technical field of three-phase three-level inverters, and in particular to a space vector modulation method for suppressing output common-mode voltages of three-level inverters. Background technique [0002] The three-level inverter is based on three fixed levels of pulse width modulation (Pulse Width Modulation, referred to as PWM) circuit, has been widely used since its inception, improving its output waveform has been the research of domestic and foreign scholars The main direction, and the output characteristics of the voltage source inverter are related to the switching frequency of the device used in the inverter. Among them, the pulse width modulation PWM technology can change the switching frequency to obtain a good sinusoidal output waveform, and the PWM modulation technology outputs the switching frequency Constant, small output current harmonics...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/537
CPCH02M7/483H02M7/537H02M1/0038
Inventor 刘冰夏晨阳张加勇朱华林洪进
Owner NAN TONG HUAWEI POWER EQUIP CO LTD
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