Impact of Dead Time on Inverter Input Current, DC-Link Dynamics, and Light-Load Instability in Rectifier-Inverter-Fed Induction Motor Drives

Guha, Ayan; Narayanan, G.

doi:10.1109/tia.2017.2768524

Cited by 23 publications

(8 citation statements)

References 30 publications

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“…ψ ω (15) where * dc V is the given DC-link voltage, ω is the motor angular velocity, Ld is the direct axis inductance, Lq is the quadrature axis inductance, and f ψ is the magnet flux. In the actual control process, on the basis of Equation (15), 1.2 times of the margin was selected.…”

Section: Side Voltage Closed Loop Designmentioning

confidence: 99%

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Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Dong

Zhang

et al. 2019

Energies

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The permanent magnet synchronous motor (PMSM) running above the base speed requires flux-weakening control, which is usually realized by the direct-axis demagnetization current generated by the vector control, thus leading to a decrease in the system efficiency in the flux-weakening region. In addition, the motor power output range is limited by the inverter output voltage and current level. In this paper, a Z-Source drive PMSM control system with adjustable DC-link voltage was proposed to improve the efficiency of the motor system. The proposed system was experimentally verified. The response time of DC-link voltage is 10 ms and the overshoot is 3%, indicating good dynamic characteristics. Compared with the flux-weakening scheme, the Z-Source inverter scheme can achieve higher efficiency (about 3%) when the PMSM speed was set to 650 r/min.

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Section: Side Voltage Closed Loop Designmentioning

confidence: 99%

“…The presence of dead time increases the torque ripple and harmonic loss of the motor. In order to reduce the adverse effect caused by dead time, it is often necessary to add dead time compensation, which increases the control difficulty [14,15].…”

Section: Introductionmentioning

confidence: 99%

Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Dong

Zhang

et al. 2019

Energies

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“…Also, the above analysis ignores dead-time effect as this is not expected to be significant at the operating conditions considered here. At high switching frequencies, when the ratio of dead time to switching period is considerable, the dead-time effect could be incorporated into the analysis, extending the approach in [16] for two-level converters.…”

Section: Three-phase Npc Invertermentioning

confidence: 99%

Analytical evaluation of DC capacitor RMS current and voltage ripple in neutral-point clamped inverters

et al. 2017

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The sizing of the DC-link capacitor in a three-level inverter is based on the RMS current flowing through it. This paper analyses the DC-link capacitor RMS current in a neutral-point clamped (NPC) inverter and expresses the same as a function of modulation index, line-side current amplitude and power factor. Analytical closed-form expressions are derived for the capacitor RMS current for single-phase half-bridge, single-phase full-bridge and three-phase three-leg topologies of a three-level inverter. The worst-case capacitor current stress is determined for each topology based on the analytical expressions. Further, analytical expressions are derived for the RMS values of low-frequency and high-frequency capacitor currents. These expressions are then used to estimate voltage ripple across the DC capacitor for sinusoidally modulated three-phase NPC inverter. The analytical expressions for the RMS current and voltage ripple are validated experimentally over a wide range of operating points. Keywords. Current control; current stress; diode-clamped inverter; full-bridge inverter; half-bridge inverter; multi-level inverter; proportional-resonant controller; sinusoidal modulation; vector control; voltage ripple.

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“…However, the vast majority of the machines are designed for the rated working state, the non-rated operating performance is not fully involved. So the operating performance enhancing control method is of great research significance [4][5].…”

Section: Introductionmentioning

confidence: 99%

Operating Performance Enhancing Method for Doubly Salient Electromagnetic Machine Under Light Load Condition

Zhou

Zhang

2020

IEEE Access

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Nowadays, more and more electric machines are demanded to operate under wide ranges of speed and load conditions. This paper deals with the operating performance enhancing method for doubly salient electromagnetic machine (DSEM) under light load condition. With the finding that the power loss can be decreased with reduced field current, and there's regulated space for the distribution of field current and armature current under light load condition. A novel control method with field current inner loop and speed outer loop is proposed for DSEM, the system driving efficiency is desired to be improved. Meanwhile, the cogging torque which is a main ripple source of DSEM torque can be decreased with the reduced filed current, so the output torque performance can be enhanced as well. In addition, the armature reaction of the proposed control method is researched, and the influence on the filed current control during commutation process is theoretically analyzed. The experiments on a 12/8-pole DSEM validate the correctness and flexibility of the proposed control method.

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Impact of Dead Time on Inverter Input Current, DC-Link Dynamics, and Light-Load Instability in Rectifier-Inverter-Fed Induction Motor Drives

Cited by 23 publications

References 30 publications

Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Analytical evaluation of DC capacitor RMS current and voltage ripple in neutral-point clamped inverters

Operating Performance Enhancing Method for Doubly Salient Electromagnetic Machine Under Light Load Condition

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