A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

Lu, Haifeng; Cheng, Xiaomeng; Qu, Wenlong; Sheng, Shuang; Li, Yituo; Wang, Zhengyu

doi:10.1109/tpel.2013.2266408

Cited by 94 publications

(6 citation statements)

References 26 publications

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“…The conventional PWM shifting method secures the measuring time by shifting the PWM pattern when the voltage reference passes the unmeasurable region, as shown in Figure 3 [4][5][6][7][8][9]. To shift the PWM pattern, the sampling voltage vector V s is located outside the Star area and then the compensation voltage vector V c is applied as shown in Figure 3a.…”

Section: The Conventional Methods Using Pwm Shiftmentioning

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%

“…To restore the phase current, the conventional methods move the voltage reference to the measurable area by shifting the PWM pattern to compensate for the distorted voltage [4][5][6][7][8][9][10][11][12]. These methods can restore the current in all operation regions, but a distorted current is caused by the PWM shift.…”

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 Conventional Methods Using Pwm Shiftmentioning

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%

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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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“…And Tlimit is stipulated in literature [22], which is 3.5%Ts approximately. The hybrid SVPWM methods are raised in [27]- [29], which compensate for the duration time of SVs by introducing new vectors. In [28], a method adopts correspondingly comprehensive strategies for reference voltage vectors (Vref).…”

Section: Introductionmentioning

confidence: 99%

Expanding Limit of Minimum Sampling Time Using Auxiliary Vectors for PMSM Drives With Single DC-Link Current Sensor

Song

et al. 2023

IEEE Trans. Ind. Electron.

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Phase current reconstruction (PCR) strategy can improve the fault tolerance of permanent magnet synchronous motor (PMSM) drives. The PCR precision is largely affected by the unmeasurable zones and time-sharing sampling errors. The upper limit (Tlimit) of PCR allowable range can reflect the requirement of different PCR methods for the minimum sampling time (Tmin). With a longer Tlimit, there is sufficient time for sampling, even if Tlimit is halved due to the symmetrical waveform. Therefore, the extension of Tlimit is the key to eliminate the unmeasurable zones and time-sharing sampling errors. In this paper, a method to increase Tlimit is proposed, which introduces the suitable auxiliary vectors (AVs) in different regions to extend the duration time of the sampling vectors. With the help of a longer Tlimit (12.5%Ts), it's possible to eliminate all the unmeasurable zones and time-sharing sampling errors, relieve the pressure on the hardware of current loop, improve the sampling accuracy, and facilitate the reliable operation of the drive. Besides, the switching action times of IGBTs can be reduced by about one-third in the high modulation area. The proposed method is finally proved to accurately reconstruct the phase currents by the experimental results on the PMSM prototype.

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“…The work in [19] proposes a switching-state phase shift (SSPS) method, based on the PWM pattern modification performed by applying phase shifts to the switching-state waveforms of the inverter, which can realize reconstruction to the phase current with less current ripples and switching losses. The work in [20] proposes a three-state pulse width modulation method, using three adjacent switch states to form a reference voltage vector, which effectively reduces the range of current unobservable area and the common mode voltage, but resulted in minor current distortion. In [21], a voltage injection method is proposed.…”

Section: Introductionmentioning

confidence: 99%

Research on error self‐correction complementary non‐zero vector pulse width modulation strategy

Shen

Xiao

et al. 2022

IET Power Electronics

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The DC link single sensor phase current reconstruction method has brought several challenges, which consist of the unobservable area and current zero drift error, where the duration of the effective vector is too short to measure, and current zero drift error leads to reconstruction error. An error self-correction complementary non-zero vector pulse width modulation (ESC 2 N-PWM) method is proposed. Through the analysis of the DC link sampling principle, the minimum sample time is defined. Then applying complementary non-zero vectors to replace zero voltage vector, the current sampling window is extended, and the sector boundary unobservable area is eliminated. At the same time, through the dynamic double sampling of the complementary effective voltage vectors, the zero drift of current is self-detected and self-corrected. The experimental results show that the reconstruction error of the proposed method is lower than 2.84%, and the current THD is lower than 6.20%.

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A Three-Phase Current Reconstruction Technique Using Single DC Current Sensor Based on TSPWM

Cited by 94 publications

References 26 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

Expanding Limit of Minimum Sampling Time Using Auxiliary Vectors for PMSM Drives With Single DC-Link Current Sensor

Research on error self‐correction complementary non‐zero vector pulse width modulation strategy

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