An improved voltage source inverter with 18-step output waveforms

2006 IEEE International Symposium on Industrial Electronics

et al. 2006

This paper presents a new modification for the mostcommon, simple, and well-known three-phase six-switch voltage source inverter (VSI). In this modification, each one of the six transistors conducts for 1500 instead of the known 1800 or 1200 conduction modes. For a wye-connected load, the output phasevoltage becomes a seven-level, 12 steps waveform. This results in a 50% reduction of the total harmonic distortion (THD), 75% reduction of voltage distortion factor (DF), and the lowest harmonic order (LOH) becomes 11 rather than 5. Comprehensive study for the three conduction modes is proposed, and a comparisons with other types of voltage source inverters, like the neutral point clamped (NPC) and the multilevel inverters (MLI) were also carried out. Simulation and experimental results show the contribution of the proposed strategy.Index Term-voltage source inverters, 1500 conduction mode, 12-Step waveform, seven-level inverter, total harmonic distortion.

Section: Theoretical Results and Simulationmentioning

confidence: 94%

Section: Theoretical Results and Simulationmentioning

confidence: 99%

Section: Theoretical Results and Simulationmentioning

confidence: 99%

Section: Theoretical Results and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On Three-Phase Six-Switches Voltage Source Inverter: a 150 Conduction Mode

Saied¹,

2006 IEEE International Symposium on Industrial Electronics

et al. 2006

On Three-Phase Six-Switches Voltage Source Inverter: A 150° Conduction Mode

Saied¹,

2006 International Conference on Applied Electronics

et al. 2006

This paper presents a new motor bearings [9], and can operate with lower modification for the most-common, simple, and well-switching frequencies. known three-phase voltage source inverter (VSI). In Although these voltage source inverters produce this modification, each one of the six transistors high voltage and current qualities-which are, in conducts for 1500 instead of the usual 1800 or 1200 general, highly required in ac drives, these converters conduction modes. For a wye-connected load, the have many disadvantages, like the huge number of output phase-voltage becomes a seven-level, 12 Steps power electronic components in some structuresand waveform-which is closer to the sinusoidal consequently the high size and weight-, the complicated waveformthan the 6-step one. This results in a 50% power and drive circuits, and the very high price reduction of the total harmonic distortion (THD), compared to the classical three-phase VSIs. Additional 75% reduction of voltage distortion factor (DF), and drawbacks are; the large number of bulk capacitors the lowest order harmonic (LOH) becomes 11 rather needed in the capacitor-clamped inverters, the isolated than 5. A comprehensive study for the three modes power supplies required for each cell in the cascaded of conduction is proposed, and a comparison with multilevel inverter, and the special construction other types of VSIs, like the neutral point clamped precautions demanded to reduce scatter inductance (NPC) and the multilevel inverters (MLI) is also between dc source and the full bridge converters (cells carried out. Simulation and experimental results per-phase) to limit overvoltage across the insulated gate show the contribution of the proposed strategy. bipolar transistors (IGBTs). Each IGBT has its own snubber circuit to avoid electromagnetic interferences Index Term-voltage source inverters, 150 (EMI) on the driver circuit [8]. conduction mode, 12-Step waveform, seven-level thi paper innovt a st w invertr, toal hamonicdistotion.This paper innovates a new strategy, which inverter, totahamonid .intentionally opens one of the three inverter legs per time-in a pre-planned sequence. This strategy combines

On Three-Phase Six-Switches Voltage Source Inverter: A 150° Conduction Mode

Saied¹,

2006 14th Mediterranean Conference on Control and Automation

et al. 2006

This paper presents a new motor bearings [9], and can operate with lower modification for the most-common, simple, and well-switching frequencies. known three-phase voltage source inverter (VSI). In Although these voltage source inverters produce this modification, each one of the six transistors high voltage and current qualities-which are, in conducts for 1500 instead of the usual 1800 or 1200 general, highly required in ac drives, these converters conduction modes. For a wye-connected load, the have many disadvantages, like the huge number of output phase-voltage becomes a seven-level, 12 Steps power electronic components in some structuresand waveform-which is closer to the sinusoidal consequently the high size and weight-, the complicated waveform-than the 6-step one. This results in a 50% power and drive circuits, and the very high price reduction of the total harmonic distortion (THD), compared to the classical three-phase VSIs. Additional 75% reduction of voltage distortion factor (DF), and drawbacks are; the large number of bulk capacitors the lowest order harmonic (LOH) becomes 11 rather needed in the capacitor-clamped inverters, the isolated than 5. A comprehensive study for the three modes power supplies required for each cell in the cascaded of conduction is proposed, and a comparison with multilevel inverter, and the special construction other types of VSIs, like the neutral point clamped precautions demanded to reduce scatter inductance (NPC) and the multilevel inverters (MLI) is also between dc source and the full bridge converters (cells carried out. Simulation and experimental results per-phase) to limit overvoltage across the insulated gate show the contribution of the proposed strategy. bipolar transistors (IGBTs). Each IGBT has its own snubber circuit to avoid electromagnetic interferences Index Term-voltage source inverters, 150 (EMI) on the driver circuit [8]. conduction mode, 12-Step waveform, seven-level