In the case of 6-step operation on one side, the zero-sequence current increases due to odd-order harmonic components because the output voltage of the inverter on one side is a square wave. In addition, it is necessary to consider higher motor speed when considering the high-power output.
Adding the opposite phase value to the final three-phase voltage reference values to cancel the voltage out. The above procedure is used to calculate and remove the zero-sequence voltage caused by the inverter at each carrier cy-cle. In the paper, the zero-sequence current reduction method caused by the inverter is defined as method-A.
In the paper, the zero-sequence current reduction method caused by the inverter is defined as method-A. 4.3 Reduction Method of Zero-Sequence Current Caused by Motor The zero-sequence voltage caused by the motor v0 motor) is generated by the harmonic component of the back-EMF.
sequence voltage. For the circuit with open-end winding PMSM, zero-sequence current is not necessarily zero be-cause there is a path where the DC-bus is common. In the zero-sequence voltage equation of Eq. (3), L0 is small value. The zero-sequence current is easily excited by zero-sequence voltage.
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In this article, a novel method based on zero-sequence voltage injection to estimate grid impedance is proposed. The target of the proposed method is to inject a third …
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Three‐level inverter systems based on the conventional Finite Control Set‐Model Predictive Control (FCS‐MPC) principle are characterized by large current ripples, …
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This article proposes an active zero-sequence voltage injection space vector pulsewidth modulation strategy (AZSV-SVPWM) to suppress capacitor current in the common …
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5.2 Increase in Zero-Sequence Current due to 6-Step Operation on One Side Fig. 12 shows the normalized voltage references for each inverters, U-phase current, and zero …
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V. CONCLUSION This paper has proposed a simple zero-sequence voltage calculation algorithm to balance the NP potential for three-level NPC inverters. The proposed …
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This paper proposes zero sequence power balancing compensation method for third harmonic injection (THI) through zero sequence reference frame. Compared to the traditional …
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Particularly, the expression of the midpoint current, regarding the modulation index and phase current amplitude, is theoretically derived. This reveals the fundamental connection …
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Particularly, the expression of the midpoint current, regarding the modulation index and phase current amplitude, is theoretically derived. This reveals the fundamental connection …
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1Abstract—This paper proposes a simple zero-sequence voltage injection method for the carrier-based pulse-width modulation (CBPWM) of the three-level neutral-point-clamped (NPC) …
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Abstract—The cluster DC voltage balancing control adopting zero-sequence voltage injection is appropriate for the star-connected cascaded H-bridge STATCOM because …
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Due to the difference of common-mode voltage (CMV), the zero-sequence circulating current (ZSCC) becomes a major issue in two paralleled voltage source inverters …
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