One-pulse PWM mode vector control for traction drives

Nakazawa, Yosuke; Toda, Shin-ichi; Yasuoka, I.; Naito, Haruo

doi:10.1109/pet.1996.565921

Cited by 15 publications

(8 citation statements)

References 1 publication

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“…Combining (11) and (12), the rotor flux angle error in (11) can be expressed as a function of reference current and the ratio of estimated rotor time constant to actual value.…”

Section: Influence On Field Orientationmentioning

confidence: 99%

The influence of mistuned motor parameters on vector control performance and on line slip frequency correction strategy for induction machine operated under one‐pulse PWM mode

Zhou

You

Wang

2014

IEEJ Transactions Elec Engng

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In high‐power, high‐speed traction drive systems, the traction motor usually operates under one‐pulse PWM (pulse width modulation) mode (square wave) during high‐speed operation. The constant output voltage in this condition makes the traditional vector control inoperative anymore. In this paper, a modified vector control strategy using open‐loop current control instead of closed‐loop current control is proposed. The modified control strategy is specially designed for an induction motor operating under one‐pulse PWM mode. As the field orientation is greatly affected by the deviation in the parameters, the influence of mistuned rotor time constant and mutual inductance (which are regarded as the most important parameters for field orientation) on the performance of modified vector control is studied comprehensively, including the influence on estimated angle and amplitude of rotor flux, d/q‐axis voltage, and output torque. Subsequently, based on the comparison between the different methods, a new slip frequency correction strategy is proposed to maintain proper field orientation for the modified vector control. The new correction strategy is based on the q‐axis current component error. It is independent of the motor parameters and can be easily realized through minor calculations. The simulation and experimental results show that the proposed slip frequency correction strategy can not only eliminate rotor flux angle error in steady state but also effect rapid torque response during the transient process under one‐pulse PWM mode. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…Combining (11) and (12), the rotor flux angle error in (11) can be expressed as a function of reference current and the ratio of estimated rotor time constant to actual value.…”

Section: Influence On Field Orientationmentioning

confidence: 99%

The influence of mistuned motor parameters on vector control performance and on line slip frequency correction strategy for induction machine operated under one‐pulse PWM mode

Zhou

You

Wang

2014

IEEJ Transactions Elec Engng

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show abstract

“…Paper [5] gives a control strategy base on stator voltage close loop to adjust the reference rotor flux magnitude under indirect FOC. The control strategy is shown in :…”

Section: Purposed Controlmentioning

confidence: 99%

“…In simulation , the superscript "^" means the estimated parameters used in control system. The simulation conditions are as follows: [5] in non-calibrated parameters the gray line is the start time from 3 wave to SW Fig. 7 shows that the IDFOC can not control the Te correctly due to the wrong rotor time constant and the phase voltage magnitude.…”

Section: Im Parametersmentioning

confidence: 99%

“…Some proposed control methods for single wave voltage feed IM FOC have been put forward. Paper [5] provide a method to achieve IM torque control under SW voltage feed Indirect FOC strategy. It has three main principles: 3.…”

Section: Introductionsmentioning

confidence: 99%

“…Paper [5] gives a basic train of thought of IM FOC under SW feeding, but it highly depends on the accuracy of the motor parameter estimation, and IDFOC strategy brings lower performance.…”

Section: Introductionsmentioning

confidence: 99%

See 2 more Smart Citations

Close-loop induction motor rotor flux field-oriented control in single wave voltage feeding

Ma¹,

Ren²,

Zhao³

et al. 2013

2013 International Conference on Electrical Machines and Systems (ICEMS)

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Voltage-source converter (VSC) is has been applied widely in feeding the induction motor(IM) . In high power wide speed-range AC drive, such as High Speed Railway Train traction converters , the IM usually are fed by Single Wave (SW) voltage in high speed reign , due to the switching loss and making full use of the voltage that DC link can provide. The amp1itude of stator voltage vector is restricted constant in the mode, which brings new problems to the conventional field oriented control (FOC) for IM. This paper discusses the strategy for IM Rotor Flux FOC under single wave voltage feed. The proposed scheme provides quick torque response in the single wave mode under direct rotor FOC. Simulation and experimental results are shown to validate the effectiveness of the control. Index Terms --f high speed train, induction motor rotor field-oriented control, , single pulse modulation, direct FOC, Traction motor drives K

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Indirect vector control with simplified rotor resistance adaptation for induction machines

Jingbo

Zhang

Wang

2015

IET Power Electronics

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A novel indirect vector control system for induction machines is proposed. To ensure accurate rotor flux orientation in face of severe thermal drift of the rotor resistance during practical operation, the system features a new rotor resistance adaptation method. The latter is based on the elimination of the q-axis rotor flux, which is calculated from steady-state relations of the induction machine. Compared with other rotor resistance adaptation methods found in the literature, for example, observer-based and model reference adaptive system-based methods, the proposed one poses much less computation burden and is quite convenient for online implementation. The basic principle and theoretical analysis are presented. The effects of other motor parameters on the adaptation method are also investigated. Based on the investigation results, a stator resistance compensation algorithm is incorporated to reduce the impact of incorrect stator resistance at low speeds. Some non-negligible issues in practical applications, such as dead-time effect and transport delay of digital pulse-width modulation process, are also investigated and taken care of. Simulation and experimental results show good dynamic and steady-state performance.Nomenclature u sd , u sq stator voltages in synchronously rotating frame i sd , i sq stator currents in synchronously rotating frame c rd , c rq rotor fluxes in synchronously rotating frame r s , r r stator and rotor resistanceŝ r s ,r r estimated stator and rotor resistances/stator and rotor resistances used in control system that are considered not necessarily accurate l s , l r , l m stator, rotor and main inductances σ leakage factor (= 1 − l 2 m /(l s l r )) l σ total leakage inductance ( = σl s ) t r ,t r actual and estimated rotor time constants (t r = l r /r r ) ω 1 , ω r synchronous and rotor angular frequencies θ 1 , θ r position angles of rotor flux and rotor shaft ω 2 , θ 2 slip frequency and slip angle (ω 2 = ω 1 − ω r , θ 2 = θ 1 − θ r ) T e electromagnetic torque n p number of pole pairs p differential operator ( = d/dt) T s sampling period t d delay time

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One-pulse PWM mode vector control for traction drives

Cited by 15 publications

References 1 publication

The influence of mistuned motor parameters on vector control performance and on line slip frequency correction strategy for induction machine operated under one‐pulse PWM mode

The influence of mistuned motor parameters on vector control performance and on line slip frequency correction strategy for induction machine operated under one‐pulse PWM mode

Close-loop induction motor rotor flux field-oriented control in single wave voltage feeding

Indirect vector control with simplified rotor resistance adaptation for induction machines

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