Impact of cable and motor loads on wide bandgap device switching and reflected wave phenomenon in motor drives

Narayanasamy, Balaji; Sathyanarayanan, A.; Deshpande, Amol; Luo, Fang

doi:10.1109/apec.2017.7930808

Cited by 18 publications

(5 citation statements)

References 15 publications

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“…Hence, the motor terminal overvoltage peak (Vpeak) with short cables can be given by ( 4) [21] peak = 3 dc m r + dc (4) where, l is the cable length, v is the pulse velocity in the cable, tr is the rise time of the inverter output voltage. The voltage pulse propagation time (tp) can be expressed as the function of l and v as shown in (5).…”

Section: Peak = DC M + Dcmentioning

confidence: 99%

“…In contrast, the switching frequency of Si IGBT inverters is normally below 20 kHz and the switching time is in the order of several hundred nanoseconds or even longer. Higher switching frequency can reduce the filtering components and the faster switching speed can reduce the switching loss, hence the cooling requirement [4] [5]. The adoption of WBG devices in motor drive systems can improve power density and efficiency and enable high-fundamentalfrequency drives for electric machines with high-speed and high number of poles.…”

Section: Introductionmentioning

confidence: 99%

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Impact of High Switching Speed and High Switching Frequency of Wide-Bandgap Motor Drives on Electric Machines

Yuan

et al. 2021

IEEE Access

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The emergence of fast-switching wide-bandgap (GaN, SiC) power electronics devices has enabled motor drive systems to achieve high efficiency, power density, control bandwidth and high-level of integration. However, the fast-switching speed and high switching frequency result in an increased level of motor overvoltage at both motor terminals and stator neutral. This overvoltage increases the stress across the motor winding insulation and bearings. This paper investigates three types of motor overvoltages, i.e., differential mode (DM) (phase-to-phase) motor terminal overvoltage, common mode (CM) (phase-to-ground) motor terminal overvoltage and CM stator neutral overvoltage (motor neutral to ground). Both the high switching speed (high dv/dt) effect and the high switching frequency effect on the motor overvoltage are investigated in this paper, where the high switching frequency effect has not been fully addressed in existing literature. Significant overvoltage is observed when the switching frequency or its multiples coincide with the cable or motor anti-resonant frequency. The anti-resonant behavior in the cable and motor impedance has been used to identify the overvoltage oscillation frequency and to explain the overvoltage observations for the three types of motor overvoltages. The analysis has been tested using a 7.5kW motor setup with and without a four-core cable, driven by a SiC or a GaN three-phase inverter with a switching frequency up to 250kHz and switching speed up to 40kV/µs. In addition, the motor bearing current, which is a main cause of bearing degradation, has also been tested and the increase of bearing current is observed due to the high frequency effect.INDEX TERMS Anti-resonance, bearing currents, common-mode, differential mode, motor drive, motor overvoltage, neutral point voltage, gallium-nitride (GaN), silicon-carbide (SiC), switching frequency, switching speed, wide-bandgap.

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Section: Peak = DC M + Dcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of High Switching Speed and High Switching Frequency of Wide-Bandgap Motor Drives on Electric Machines

Yuan

et al. 2021

IEEE Access

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“…The voltage transients on the motor-side, produced during the switching of the power semiconductors, are not observed in the simulation but are appreciated in the experimentation (Figure 12(f)). This leads to the phenomenon of the reflected wave, which is amplified if the distance between the VFD and the induction motor increases, generating damaging overvoltages for the conductors and the induction motor, and damaging overcurrents for the VFD [41], [42]. The motor-side voltage also has a high harmonic distortion as a consecuence of the PWM control signal.…”

Section: Experimental Results and Model Validationmentioning

confidence: 99%

Comparative study by numerical simulation of two methods for automatic flow control in centrifugal pumps

Andrade-Cedeno

Pérez‐Rodríguez²,

Amaya-Jaramillo³

et al. 2022

IJPEDS

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Flow rate and pressure are variables of great interest in the process control industry, especially in pumping systems. With the help of modeling and simulation, it is possible to understand the operation of these systems prior to their construction, in addition to allowing their behavior to be analyzed in various operational scenarios and testing different control strategies. In this work, the hydraulic, mechanical, electrical and electronic models of the different components of the system are studied. Two study cases for automatic flow control are assembled, using Simscape library from MATLAB/Simulink R2019b. This study cases are: i) with a control valve and ii) with a variable speed drive. The simulations determined that both cases keep the flow constant in the face of pressure disturbances, with a good dynamic response. Case 2 consumes less power than case 1, between 24 and 64% less, especially at low flow rates. It also reduce unwanted mechanical and electrical problems due to sudden starts and stops. Case 2 produced harmonic pollution on both the grid and motor sides, which implies a potential risk for the motor and the electrical grid. Case 2 was experimentally validated, obtaining errors of less than 10%.

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“…The impact of the wave reflection for a cable is thus dependent on the size of the cable parasitic capacitive CM couplings throughout the length of the cable and the riseand fall times of the PWM voltage of the power semiconductor device. Mitigation strategies proposed for the reflected wave phenomenon currently involves the introduction of filters to damp the undamped reflected waves [259], however, these strategies introduce additional losses in the filters [260]. This emphasizes the need for more research addressing the reflected wave phenomenon and possible mitigation strategies for short cable lengths.…”

Section: F Conductorsmentioning

confidence: 99%

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

Kjærsgaard

Liu

Nielsen

et al. 2023

IEEE Trans. Power Electron.

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Impact of cable and motor loads on wide bandgap device switching and reflected wave phenomenon in motor drives

Cited by 18 publications

References 15 publications

Impact of High Switching Speed and High Switching Frequency of Wide-Bandgap Motor Drives on Electric Machines

Impact of High Switching Speed and High Switching Frequency of Wide-Bandgap Motor Drives on Electric Machines

Comparative study by numerical simulation of two methods for automatic flow control in centrifugal pumps

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

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