PWM inverter switching strategy for a dual two-level inverter fed open-end winding induction motor drive with a switched neutral

Somasekhar, V. T.; Gopakumar, K.; Pittet, A.; Ranganathan, V.

doi:10.1049/ip-epa:20020127

Cited by 63 publications

(42 citation statements)

References 2 publications

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“…The eight switching states of inverter-1 are numbered from 1-8 while for inverter-2 they are numbered from 1'-8'. The dual two level VSI configuration therefore has 64 switching combination spread over 19 space locations shown in Fig.2 [12]. While realizing the space vector, depending upon the selection of switching states CMV varies.…”

Section: Dual Two Level Vsimentioning

confidence: 99%

“…Simple three-level inversion obtained using this configuration employs two isolated DC power supplies (for the two twolevel inverters) in order to cease the circulating common mode current [7]. Alternate arrangements like common-mode chokes [7] and/or additional switching resources [12] are used to address the common mode current issues. A few PWMs are also proposed from this power circuit topology that reduces the CMV and in some cases completely eliminates it [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

“…Alternate arrangements like common-mode chokes [7] and/or additional switching resources [12] are used to address the common mode current issues. A few PWMs are also proposed from this power circuit topology that reduces the CMV and in some cases completely eliminates it [12]- [15]. Also presented for this dual-inverter configuration are PWMs with constant CMV by exclusively selecting such switching combinations that generate same CMV, in order to avoid the bearing currents of electro-static origin [13].…”

Section: Introductionmentioning

confidence: 99%

“…The use of multilevel inverters, offer the advantage of generating higher voltages using lower rating switching devices [7][8][9][10][11][12][13][14][15]. The dual-inverter with the open-end winding induction motor drive fall in the category of multi level inverter drive that is capable of generating multilevel voltage output [7].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Common mode voltage elimination PWMs for a dual two-level VSI with single inverter switching

Kalaiselvi

Sekhar

Srinivas

2012

2012 IEEE International Symposium on Industrial Electronics

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This paper discusses two new pulse width modulation (PWM) switching methods for eliminating common mode voltage (CMV) in the dual two-level voltage source inverter (VSI). Both the PWM methods also ensures that the switching power loss is limited to one inverter only at all instants of time. Analytical expressions for switching times of the phase switching devices of the two inverters are developed to force the CMVs in a dual two level VSI configuration to zero which enables the dualinverter drive to be driven from a single DC power supply. The implementation of the proposed PWM algorithm depends only on the instantaneous magnitudes of the reference space vector on the stationary reference axes. The impementation totally avoids use of sector identification and also the use of look up tables.Index Terms-Dual-inverter, Three-level inverter, Open-end winding induction motor drive, Pulse width modulation, Common mode voltage.

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Section: Dual Two Level Vsimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Common mode voltage elimination PWMs for a dual two-level VSI with single inverter switching

Kalaiselvi

Sekhar

Srinivas

2012

2012 IEEE International Symposium on Industrial Electronics

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“…However, in the case of one single DC power supply operating, zero-sequence circumfluence resulting from zerosequence voltage generated by inverters cascaded at either end of open-winding induction motors still attracts the interest of many researchers, which mainly focus on dual two-level inverters and dual three-level inverters. To solve this problem, many zero-sequence voltage elimination methods and modulation strategies have been proposed based on dual two-level and dual three-level inverters [8]- [16].…”

Section: Introductionmentioning

confidence: 99%

A New Method for Elimination of Zero-Sequence Voltage in Dual Three-Level Inverter Fed Open-End Winding Induction Motors

Geng¹,

Wei²,

Chen³

et al. 2017

Journal of Power Electronics

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Due to the excessive zero-sequence voltage in dual three-level inverter fed open-end winding induction motor systems, zerosequence circumfluence which is harmful to switching devices and insulation is then formed when operating in a single DC voltage source supplying mode. Traditionally, it is the mean value instead of instantaneous value of the zero-sequence voltage that is eliminated, through adjusting the durations of the operating vectors. A new strategy is proposed for zero-sequence voltage elimination, which utilizes unified voltage modulation and a decoupled SVPWM strategy to achieve two same-sized equivalent vectors for an angle of 120°, generated by two inverters independently. Both simulation and experimental results have verified its efficiency in the instantaneous value elimination of zero-sequence voltage.

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Reduction of torque and flux ripples in direct torque control for three‐level open‐end winding PMSM drive

Eshwar

Kumar

2020

IET Electric Power Applications

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The direct torque control (DTC) of permanent magnet synchronous motor (PMSM) drives is a noticeable practice in industrial applications due to its quick dynamic performance. However, due to the presence of hysteresis controllers and inaccurate switching tables especially for the multilevel fed DTC drives are facing higher ripples in torque and flux response. An improved DTC for three-level open-end winding PMSM drive is proposed in this article and features reduction of flux and torque ripples. The torque and flux performances of the PMSM are directly controlled by the calculated reference voltage vector in the stationary reference frame. The voltage vector tables are proposed based on the length of the voltage space vectors and the actual voltage vector nearer to the calculated reference voltage vector is selected so that the minimum ripples exist in flux and torque responses. The steady-state and dynamic conditions of the proposed DTC method are verified in the real-time experiment and also compared with the conventional DTC as well as the recently developed control methods.

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PWM inverter switching strategy for a dual two-level inverter fed open-end winding induction motor drive with a switched neutral

Abstract: A dual two-level inverter fed open-end winding induction motor drive is proposed in this paper. A total of 64 voltage space phasor combinations are possible in this scheme since each

Cited by 63 publications

References 2 publications

Common mode voltage elimination PWMs for a dual two-level VSI with single inverter switching

Common mode voltage elimination PWMs for a dual two-level VSI with single inverter switching

A New Method for Elimination of Zero-Sequence Voltage in Dual Three-Level Inverter Fed Open-End Winding Induction Motors

Reduction of torque and flux ripples in direct torque control for three‐level open‐end winding PMSM drive

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