A SCR-based switch-control strategy of delta/wye switchover for delta connected induction motors

Shi, Peipei; Cui, Xueshen; Zhu, Liang

doi:10.1109/ipemc.2012.6259271

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Transferring (19)- (21) into matrix form then gives Neglecting the dead-time effects and finite switching times, the inverter phase voltages can take two values: +U DC /2 if an upper switch is on, and −U DC /2 if a lower switch is on. This can be summarized as…”

Section: Switching Combinationmentioning

confidence: 99%

“…Transferring (19)- (21) into matrix form then gives PTC's principle is based on the conventional DTC strategy, which utilizes the stator voltage vector equation in the stationary αβ system for the flux and torque control. At higher speeds, i.e., higher supply frequencies, the magnitude of the stator (i.e., the leakage and magnetizing) reactance becomes much more significant than the stator resistance.…”

Section: Switching Combinationmentioning

confidence: 99%

“…The IMs utilized in the industry are designed to operate either in star or delta winding configuration. Online winding changeover techniques are a common practice either for inverter-fed [15][16][17][18][19][20] or for direct-online (DOL) [21][22][23] operated electrical machines. Within DOL motors, star-delta switches are predominantly used to improve the motor power factor and efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Current Ripple Reduction of Predictive Torque-Controlled Induction Motor Drive Using Delta-Star Switchover

et al. 2021

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The current and torque ripple of inverter-fed induction motor drives is an inherent problem of control strategies working with switching frequencies in the range of multiple kilohertz, such as direct torque and, more recently, predictive torque control. If the drive operates in a wide-speed and wide-torque range and is equipped with a machine with an accessible terminal block whose winding is nominally connected in delta, then the current and torque ripple can be reduced by utilizing the delta-star winding changeover technique. When the winding configuration is switched from delta to star, the instantaneous motor phase voltage peak is lowered, and its total harmonic distortion is reduced. However, the control strategy must be adjusted according to the actual winding topology, mainly due to the difference in the coordinate transformations of the measured currents and the difference between the phase voltage vectors obtained from the inverter. This paper proposes a predictive torque control of an induction motor drive with a switchable delta-star winding configuration. The paper is supported by theoretical background, and the key idea is verified by simulations in MATLAB/Simulink and experiments conducted on a dSPACE-controlled 5.5-kW laboratory drive. The simulations validated the presented equations and show the effects of not respecting the actual winding topology. The experiments mainly focused on analyzing the total harmonic distortion of the currents and consumed electrical power in multiple operating points.

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Section: Switching Combinationmentioning

confidence: 99%

Section: Switching Combinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Current Ripple Reduction of Predictive Torque-Controlled Induction Motor Drive Using Delta-Star Switchover

et al. 2021

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A Snubberless Solid-State Tap Changer for Permanent Magnet Synchronous Motors

2020

IEEE Trans. Power Electron.

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Design of Stator Winding Turn Number of Tap-Change PMSM for EVs According to Driving Cycles

Lim

et al. 2022

Energies

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Driving cycles are commonly used to evaluate the fuel efficiency and mileage of internal combustion engine vehicles and electric vehicles (EVs). To improve the mileage of EVs, efficient propulsion motors and inverters must be employed, particularly at frequently used speed and torque points of driving cycles. In this study, the number of the stator winding turns of a tap-change permanent magnet synchronous motor (PMSM) used for EV propulsion was investigated to increase the motor and inverter energy efficiencies under an urban dynamometer driving schedule (UDDS), a highway fuel economy test (HWFET), and combined UDDS/HWFET driving cycles. The motor core loss due to the carrier harmonics, copper loss, and inverter loss were analyzed for various winding turn number combinations, and the most efficient combination was selected. Based on the analysis results, the tap-change motor winding turns that exhibited the least loss were rewound on a PMSM of a mass-produced EV. The demand energy of the proposed tap-change PMSM and that of a mass-produced PMSM in the UDDS, HWFET, and combined UDDS/HWFET driving cycles were compared through experimentation. The proposed PMSM exhibited energy improvements of 1.50%, 1.84%, and 1.65%, respectively.

show abstract

A SCR-based switch-control strategy of delta/wye switchover for delta connected induction motors

Cited by 3 publications

References 5 publications

Current Ripple Reduction of Predictive Torque-Controlled Induction Motor Drive Using Delta-Star Switchover

Current Ripple Reduction of Predictive Torque-Controlled Induction Motor Drive Using Delta-Star Switchover

A Snubberless Solid-State Tap Changer for Permanent Magnet Synchronous Motors

Design of Stator Winding Turn Number of Tap-Change PMSM for EVs According to Driving Cycles

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