Wide Bandgap Devices in AC Electric Drives: Opportunities and Challenges

Morya, Ajay Kumar; Gardner, Matthew C.; Anvari, Bahareh; Li, Liming; Yepes, Alejandro G.; Doval-Gandoy, Jesús; Toliyat, H.A.

doi:10.1109/tte.2019.2892807

Cited by 302 publications

(88 citation statements)

References 141 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among these advantages, the fast switching speed plays a crucial role in reducing the switching losses and increasing the switching frequencies [2]. As a result, using SiC MOSFETs in ASDs can significantly improve the system efficiency, control accuracy and dynamic response as well as reducing the torque ripple, when compared with Si-based counterparts [3].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Motor Overvoltage in SiC-Device-Based Drives using a Soft-Switching Inverter

Zhou

Diab

Yuan

2020

2020 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

In SiC motor drives, the high-voltage slew rate (/) of switching transients results in excessive motor overvoltage, due to the reflected wave phenomenon (RWP), which stands behind the premature failure of motor winding insulation while raises electromagnetic interference (EMI) problems. This paper adopts a soft-switching inverter topology, denoted as the auxiliary resonant commutated pole inverter (ARCPI), to mitigate the motor overvoltage caused by the RWP in SiC-based cable-fed drives. The performance of the SiC motor drive system under the RWP is first investigated to determine how the motor overvoltage is affected by the / of the inverter output voltage and the cable length. Then, a SiC ARCPI with profiled output voltage slew rate is utilized as a candidate solution to mitigate the RWP in the cable-fed motor drive. The effectiveness of the presented mitigation approach is experimentally verified, where it is shown that the ARCPI can completely eliminate the motor overvoltage and improve the EMI performance at high frequency region (500 kHz onwards) due to the prolonged rise/fall time of the output voltage, compared with the conventional hard-switching inverter. Keywords-Auxiliary resonant commutated pole inverter (ARCPI), high / , motor drives, reflected wave phenomenon, SiC MOSFET, soft-switching inverter.

show abstract

Section: Introductionmentioning

confidence: 99%

Mitigation of Motor Overvoltage in SiC-Device-Based Drives using a Soft-Switching Inverter

Zhou

Diab

Yuan

2020

2020 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

show abstract

“…In all three cases, the SiC MOSFETs perform better than the Silicon IGBTs in terms of conduction losses, switching losses and junction temperature fluctuation. However, the impact of the higher EMI due to electromagnetic oscillations and the impact of higher dV/dt on motor insulation windings should be considered [25]. The higher dV/dt coupled with parasitic capacitances in the cables, motors and converters cause higher common mode currents as well as other problems like voltage reflections which have a negative impact on motor insulation [26].…”

Section: Case 3 -Same Current Density Comparison In Full Power Accmentioning

confidence: 99%

The Potential of SiC Cascode JFETs in Electric Vehicle Traction Inverters

Gonzalez

Davletzhanova

et al. 2019

IEEE Trans. Transp. Electrific.

View full text Add to dashboard Cite

The benefits of implementing SiC devices in EV powertrains has been widely reported in various studies. New generations of SiC devices including planar MOSFETs, trench MOSFETs and more recently, cascode JFETs have been released by various manufacturers. SiC cascode devices comprise of low voltage silicon MOSFETs for gate driving and high voltage depletion mode SiC JFETs for voltage blocking. These devices are particularly interesting because it avoids the known reliability issues of SiC gate oxide traps resulting in threshold voltage drift. In this paper, an EV powertrain is simulated using experimental measurements of conduction and switching energies of various SiC devices including 650V trench, 900V planar and 650V cascode JFETs. Unlike previous papers where losses are calculated using models based on datasheet parameters, here static and dynamic measurements on the power devices at different currents and temperatures are used to calculate losses over simulated driving cycles. Field-stop IGBTs are also evaluated. The 3-phase 2-level inverter model is electrothermal by accounting for the measured temperature dependence of the losses and uses accurate thermal networks derived from datasheets. Converter efficiency and thermal performance are compared for each device technology. Results show that SiC cascode JFETs have great potential in EV powertrain applications. I.

show abstract

“…Operating at higher switching frequencies can entail more severe CMV related issues (additional EMI generation and larger number of dv/dt) [26]. As considerable efforts are being carried out to widespread the usage of wide bandgap (WBG) devices in AC drives, much higher switching frequencies are expected in the future, making the investigation on CMV mitigation a popular topic [13,19,20].…”

Section: Introductionmentioning

confidence: 99%

New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives

et al. 2020

View full text Add to dashboard Cite

Star-connected multiphase AC drives are being considered for electromovility applications such as electromechanical actuators (EMA), where high power density and fault tolerance is demanded. As for three-phase systems, common-mode voltage (CMV) is an issue for multiphase drives. CMV leads to shaft voltages between rotor and stator windings, generating bearing currents which accelerate bearing degradation and produce high electromagnetic interferences (EMI). CMV effects can be mitigated by using appropriate modulation techniques. Thus, this work proposes a new Hybrid PWM algorithm that effectively reduces CMV in five-phase AC electric drives, improving their reliability. All the mathematical background required to understand the proposal, i.e., vector transformations, vector sequences and calculation of analytical expressions for duty cycle determination are detailed. Additionally, practical details that simplify the implementation of the proposal in an FPGA are also included. This technique, HAZSL5M5-PWM, extends the linear range of the AZSL5M5-PWM modulation, providing a full linear range. Simulation results obtained in an accurate multiphase EMA model are provided, showing the validity of the proposed modulation approach.

show abstract

Wide Bandgap Devices in AC Electric Drives: Opportunities and Challenges

Cited by 302 publications

References 141 publications

Mitigation of Motor Overvoltage in SiC-Device-Based Drives using a Soft-Switching Inverter

Mitigation of Motor Overvoltage in SiC-Device-Based Drives using a Soft-Switching Inverter

The Potential of SiC Cascode JFETs in Electric Vehicle Traction Inverters

New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives

Contact Info

Product

Resources

About