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Vector control method of simplified five-phase and three-level voltage source inverter

A voltage source inverter, vector control technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of complex control, large energy loss, etc., achieve high pulsation frequency, small output harmonics, switching Low loss effect

Active Publication Date: 2015-06-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing five-phase three-level voltage source inverter has many power switching devices, which lead to large energy loss and complicated control, the present invention proposes a simplified five-phase three-level voltage source inverter vector Control Method

Method used

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  • Vector control method of simplified five-phase and three-level voltage source inverter
  • Vector control method of simplified five-phase and three-level voltage source inverter
  • Vector control method of simplified five-phase and three-level voltage source inverter

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specific Embodiment approach 1

[0028] Specific implementation mode one: see figure 1 and Figure 5 Describe this embodiment mode, the simplified five-phase three-level voltage source inverter described in this embodiment mode, it is composed of three-level double Buck stage circuit 1, two-level voltage type inverter stage circuit 2, DC power supply 3, Capacitance C 1 and capacitance C 2 composition,

[0029] Capacitance C 1 and capacitance C 2 connected in parallel with the two output terminals of the DC power supply 3 after being connected in series, the capacitor C 1 and capacitance C 2 The capacitance values ​​are the same, the first input terminal P of the three-level dual Buck stage circuit 1 is connected to the positive pole of the DC power supply 3, and the second input terminal of the three-level dual Buck stage circuit 1 is connected to the capacitor C 1 and capacitance C 2 The connection terminal O of the three-level dual Buck stage circuit 1 is connected to the negative pole of the DC pow...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment is further limited by the simplified five-phase three-level voltage source inverter described in Embodiment 1. The three-level dual Buck stage circuit (1) is composed of a first IGBT switch ( S 1 ), the second IGBT switch (S 2 ), the third IGBT switch (S 3 ) and the fourth IGBT switch (S 4 ) composition, the first IGBT switch (S 1 ) as the first input terminal (P) of the three-level dual Buck stage circuit (1), the first IGBT switch (S 1 ) of the emitter and the second IGBT switch (S 2 ) are connected as the first output terminal (P_vin) of the three-level dual Buck stage circuit (1), and the second IGBT switch (S 2 ) of the emitter and the third IGBT switch (S 3 )’s collectors are connected, and the second IGBT switch (S2 ) as the second input terminal of the three-level dual Buck stage circuit (1), the third IGBT switch (S 3 ) of the emitter and the fourth IGBT switch (S 4 )’s collectors are connected, and the third IGBT switch (S...

specific Embodiment approach 3

[0032] Specific embodiment three: the further limitation of this embodiment and the simplified five-phase three-level voltage source inverter described in specific embodiment two, the four IGBT switches S of the three-level dual Buck stage circuit 1 1 , S 2 , S 3 and S 4 The state of the two output terminals of the three-level dual Buck stage circuit 1 outputs two levels of V P_inv and V N_inv The relationship between them is shown in Table 1:

[0033] Table I

[0034]

[0035] Table V DC Indicates the capacitance C 1 The magnitude of the voltage across the terminal.

[0036] The simplified five-phase three-level voltage source inverter described in this embodiment is similar to the traditional three-level mid-point clamped voltage source inverter. The inverter consists of two series capacitors C 1 and C 2 power supply, the voltage on each capacitor is half of the supply voltage V DC . Capacitance C 1 and capacitance C 2 The connection terminal O of the DC volt...

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Abstract

The invention relates to a simplified five-phase and three-level voltage source inverter and a vector control method thereof, and belongs to the technical field of power electronic converters. Provided are the simplified five-phase and three-level voltage source inverter and the vector control method thereof which solve the problem that an existing five-phase and three-level voltage source inverter needs more power switch elements. A capacitor C1 and a capacitor C2 of the simplified five-phase and three-level voltage source inverter are connected with two output ends of a direct current power supply in parallel after the capacitor C1 and the capacitor C2 are connected in series. A first input end of a three-level and double-buck level is connected with a positive pole of the direct current power supply. A second input end of the three-level and double-buck level is connected with the connecting end of the capacitor C1 and the capacitor C2. A third input end of the three-level and double-buck level is connected with a negative pole of the direct current power supply. The first input end of the three-level and double-buck level is connected with a first input end of a two-level voltage type inversion level. The second input end of the three-level and double-buck level is connected with a second input end of the two-level voltage type inversion level. The simplified five-phase and three-level voltage source inverter and the vector control method thereof are applicable to application scenarios with middle and low pressure and high power.

Description

technical field [0001] The invention belongs to the technical field of power electronic converters. Background technique [0002] At present, the AC speed control system composed of three-phase inverter and three-phase motor is the most representative and widely used in terms of economy and technology maturity. However, with the development of society and economy, higher requirements are put forward for AC speed control systems in the fields of industry, civil and military, especially in terms of high power, high torque density, high power density and high reliability, and Today medium and high power AC drive systems account for 70% of all electrical drive system electricity consumption. Although the traditional three-phase motor and its speed regulation technology are quite mature, they cannot fully meet the application requirements due to their own limitations. [0003] Compared with three-phase motors, multi-phase AC motors (more than three-phase) increase the frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02M7/537H02M3/155H02M1/12
Inventor 刘洪臣王国立于海龙
Owner HARBIN INST OF TECH