Unified voltage modulation technique for real-time three-phase power conversion

Chung, Dong June; Kim, Joohn-Sheok; Sul, Seung-Ki

doi:10.1109/28.663482

Cited by 272 publications

(13 citation statements)

References 7 publications

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“…From i a (n 1 ) the average phase current i a,avg can be calculated by using Equation (8) when the switching state V 0 is applied: In addition, the switching duration time T 0 , T 1 , and T 2 can be calculated from Equations (9) to (11) by using SVPWM calculation [18]:…”

Section: The Average Current Estimation Methods From the Shunt Resistomentioning

confidence: 99%

“…In addition, the switching duration time 0 T , 1 T , and 2 T can be calculated from Equations (9) to (11) by using SVPWM calculation [18]:…”

Section: The Average Current Estimation Methods From the Shunt Resistomentioning

confidence: 99%

“…This method is available in the Bar area, but the current reconstruction is impossible because the initial current cannot be measured in the Star area. Thus, an additional reconstruction method is required in the low modulation region [18]. In this paper, depending on a pre-defined region, the current reconstruction methods using the average currents and the current references and the intermittent PWM shift are used for all operation region.…”

Section: Introductionmentioning

confidence: 99%

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A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System

Park

Kim

Yeom³

et al. 2019

Energies

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To reduce the cost of the inverter system in home appliances, a method using a shunt resistor at the DC-link can be substituted for a method using two current sensors at the inverter output. However, the minimum time of the active vector is required to sample the accurate current using a 1-shunt resistor. Therefore, many studies have been conducted investigating current reconstruction methods in the unmeasurable region of the current. The conventional methods using voltage injection have some problems such as high THD (Total Harmonic Distortion) and acoustic noise, because the PWM pattern is shifted. In addition, the current reconstruction is inaccurate in a low modulation region. In this paper, the cause of the noise in conventional methods is analyzed and a simple current reconstruction method based on an average current estimation and a current reference is utilized for reducing acoustic noise. In an immeasurable area, especially a low modulation region, an intermittent PWM shift method is proposed to enhance the accuracy of the reconstructed current. Therefore, a control strategy that combines all of the mentioned methods is implemented for the entire operating range. The effectiveness of the proposed methods is verified through the experimental results and the results of sound measurement in an anechoic chamber are included to compare with the acoustic noise.

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Section: The Average Current Estimation Methods From the Shunt Resistomentioning

confidence: 99%

“…In addition, the switching duration time 0 T , 1 T , and 2 T can be calculated from Equations (9) to (11) by using SVPWM calculation [18]:…”

Section: The Average Current Estimation Methods From the Shunt Resistomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System

Park

Kim

Yeom³

et al. 2019

Energies

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“…However, it also increases switching losses. On the other hand, in a three-phase PWM inverter, various continuous and discontinuous modulation techniques can be implemented by adding an appropriate offset voltage [13][14][15][16][17][18]. Selecting the appropriate offset voltage can provide advantages such as reduced switching losses, improved waveform quality, and increased linear range.…”

Section: Introductionmentioning

confidence: 99%

± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System

2020

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As high-capacity alternating current/direct current (ac/dc) power conversion systems, single-phase pulse-width modulation (PWM) converters used in high-speed railway propulsion systems adopt high-voltage Insulated-Gate Bipolar Transistors (IGBTs) as switching elements. Due to their high breakdown voltage characteristics, the switching dynamics are inferior to those of low-voltage IGBTs and switching losses are more dominant than conduction losses despite operating at relatively low switching frequencies of hundreds to several kHz. To solve this problem, this paper proposes ± 180° discontinuous PWM (DPWM) suitable for a single-phase circuit. With the simple addition of offset voltages, the proposed DPWM method can be implemented easily and switching losses can be reduced by half by clamping the switching legs of the H-bridge converter to the positive or negative dc rail during every half cycle. In addition, temperature deviation between the power stacks can be minimized by using selective application of clamping modes. The validity and effectiveness of the proposed DPWM are verified through simulations and experiments of a prototype converter.

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“…An attempt has been made to find the performance of the cascaded multilevel inverter topologies [10][11][12]. PWM modulation for the cascaded inverter is a well established and intensive research topic [13][14][15][16], but some modification of the modulation process is done to maintain the balanced DC voltage [17]. To obtain low distorted output voltage phase disposition (PD), phase opposition disposition (POD), and alternate phase opposition disposition (APOD) modulation techniques are used [18].…”

Section: Introductionmentioning

confidence: 99%

Control of a ternary voltage progression based cascaded multilevel inverter using classy split multicarrier pulse width modulation

Subarnan¹,

Venugopal²

2016

Turk J Elec Eng & Comp Sci

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In this paper, a new hybrid pulse width modulation technique is proposed to enhance the performance of output voltage from a ternary progression based multilevel inverter. For high power applications, the multilevel inverter can appropriately replace the traditional converter without a transformer and the separate DC sources will be indispensable for various renewable energy sources. The classy split switching technique for the multicarrier pulse width modulation technique is adopted and the concept about new topology is presented in this paper. An arm controller has been chosen to implement the modulation due to its superior features, easy software, and hardware design. Simulation and experimental results are also presented.

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Unified voltage modulation technique for real-time three-phase power conversion

Cited by 272 publications

References 7 publications

A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System

A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System

± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System

Control of a ternary voltage progression based cascaded multilevel inverter using classy split multicarrier pulse width modulation

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