Modulation Techniques for Common-Mode Voltage Reduction in the Z-Source Ultra Sparse Matrix Converters

Bozorgi, Amir Masoud; Hakemi, Amir; Farasat, Mehdi; Monfared, Mohammad

doi:10.1109/tpel.2018.2820659

Cited by 24 publications

(11 citation statements)

References 33 publications

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“…Modulation strategy was modified and auxiliary circuits were added in to improve the MC performance. Among them, Z-source/ quasi-Z source (ZS/QZS) MCs [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] are effective topologies to overcome the issues.…”

Section: Introductionmentioning

confidence: 99%

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Quasi‐Zsource indirect matrix converter‐fed induction motor drive

Guo

Liu

Ge³

et al. 2020

IET Electric Power Applications

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This study proposes an induction motor drive system based on the LC filter integrated quasi-Z source indirect matrix converter (QZS-IMC). The proposed drive system shows the following features: (i) variable voltage control of inductor motor is achieved by the rectifier stage and variable frequency control is achieved by the inverter stage; (ii) automatic low voltage ride through ability enhances capability of the proposed drive against grid voltage sag; (iii) wide voltage gain range ensures the drive system with high performance in wide speed range; (iv) there is no additional input filter. The voltage control implementation in the rectifier stage is proposed to benefit low voltage stress and low converter loss. The control method combines motor vector control, minimum shoot-through duty cycle and maximum modulation indexes. As a result, the input power supply voltage and dc-link voltage are maximally utilised and the power loss is reduced. Simulation and experimental results verify the proposed QZS-IMC motor drive system.

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Section: Introductionmentioning

confidence: 99%

“…However, conventional MCs show disadvantages such as low voltage gain and poor anti‐interference ability. Modulation strategy was modified and auxiliary circuits were added in [19–43] to improve the MC performance. Among them, Z ‐source/ quasi‐ Z source (ZS/QZS) MCs [26–43] are effective topologies to overcome the issues.…”

Section: Introductionmentioning

confidence: 99%

Quasi‐Zsource indirect matrix converter‐fed induction motor drive

Guo

Liu

Ge³

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…Quasi-Z-source (QZS) inverters have been widely used for grid-tied applications, due to their advantages over the traditional voltage-source inverters (VSIs) using a DC-DC converter [1][2][3][4][5][6][7]. Figure 1 shows the circuit diagram of the QZS inverter for single-phase grid-tied applications [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…As it is connected to the grid v g without an isolation transformer, a leakage current i p flows through the parasitic capacitance C p between the inverter and the grid [5]. This leakage current originated from the common-mode voltage v p , which changes rapidly as the inverter operates with high switching frequency [6]. Due to shoot-through states, the common-mode voltage in the QZS inverter can be higher than that in the conventional VSIs [7].…”

Section: Introductionmentioning

confidence: 99%

Transformerless Quasi-Z-Source Inverter to Reduce Leakage Current for Single-Phase Grid-Tied Applications

Choi

Yang

2019

Electronics

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The conventional single-phase quasi-Z-source (QZS) inverter has a high leakage current as it is connected to the grid. To address this problem, this paper proposes a transformerless QZS inverter, which can reduce the leakage current for single-phase grid-tied applications. The proposed inverter effectively alleviates the leakage current problem by removing high-frequency components for the common-mode voltage. The operation principle of the proposed inverter is described together with its control strategy. A control scheme is presented for regulating the DC-link voltage and the grid current. A 1.0 kW prototype inverter was designed and tested to verify the performance of the proposed inverter. Silicon carbide (SiC) power devices were applied to the proposed inverter to increase the power efficiency. The experimental results showed that the proposed inverter achieved high performance for leakage current reduction and power efficiency improvement.

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“…Termed as the unidirectional MC (UMC) in this paper, the simplified topology is shown in Figure 1b. Moreover, it is possible to further reduce the usage of transistors by using other configurations of switches at the rectifier stage [6][7][8][9]. Nevertheless, the stability issue has subordinate priority in the control goal of existing schemes.…”

Section: Introductionmentioning

confidence: 99%

Input Disturbance Suppression for Unidirectional Matrix Converter with a Stability-Enhancing Modulation Scheme

2019

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This paper proposes an input voltage disturbance suppression control strategy for the unidirectional matrix converter (UMC) with a new modulation scheme enhancing the stability. In the new scheme, the modulation index is directly, rather than reversely, proportional to the instantaneous amplitude of input filter capacitor voltages. Contrary to traditional schemes, the stability of the UMC with this new scheme is even better with the increase of the transferred active power, which is particularly suitable for applications with sinusoidal and balanced input conditions. As to the disturbed input conditions, the new scheme could introduce low-frequency harmonics into output currents. To address this issue, a feedback control strategy of output current amplitude is further proposed to eliminate the additional harmonics. Stability analysis of a UMC with the proposed modulation scheme and feedback control strategy is presented. Experimental results have verified the validity of the proposed control solution.

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Modulation Techniques for Common-Mode Voltage Reduction in the Z-Source Ultra Sparse Matrix Converters

Cited by 24 publications

References 33 publications

Quasi‐Zsource indirect matrix converter‐fed induction motor drive

Quasi‐Zsource indirect matrix converter‐fed induction motor drive

Transformerless Quasi-Z-Source Inverter to Reduce Leakage Current for Single-Phase Grid-Tied Applications

Input Disturbance Suppression for Unidirectional Matrix Converter with a Stability-Enhancing Modulation Scheme

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