A Two-Frequency Quasi Six-Phase Voltage Source Inverter Based on Space Vector PWM

In this study, a direct torque and flux control is described for a six-phase asymmetrical speed and voltage sensorless induction machine (IM) drive, based on non-linear backstepping control approach. First, the decoupled torque and flux controllers are developed based on Lyapunov theory, using the machine two axis equations in the stationary reference frame. In this control scheme, the actual stator voltages are determined from dc-link voltage using the switching pattern of the space vector pulse-width modulation inverter. Then, for a given motor load torque and rotor speed, a so-called fast search method is used to maximise the motor efficiency. According to this method, the rotor reference flux is decreased in the small steps, until the average of real input power to the motor reaches to a minimum value. In addition, a model reference adaptive system-based observer is employed for online estimating of the rotor speed. Finally, the feasibility of the proposed control scheme is verified by simulation and experimental results.

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“…xy = 0 [21]. The average voltage of an inverter leg over the switching period is a function of only the duty cycle applied to that leg.…”

Section: Minimisation Of the Switchings Numbermentioning

confidence: 99%

“…For example, Fig. 4 shows the switching pattern for a switching period, for the references

v_{α β}^{*} = 0.4 V_{DC} ∠ 90

(positioned in the third sector) and

v_{x y}^{*} = 0

[21].…”

Section: Space Vector Pulse‐width Modulationmentioning

confidence: 99%

Speed sensorless control of a six‐phase induction motor drive using backstepping control

Fatemi

Abjadi

Soltani

et al. 2014

IET Power Electronics

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“…Further relevant insights into the properties of the two-motor sixphase drive are given in [97], while [98] discusses a convenient PWM method for the same drive structure. Advanced control aspects are covered in [99].…”

Section: A Multi-motor Multiphase Drive Systems With Single Vsi Supplymentioning

confidence: 99%

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Levi

2016

IEEE Trans. Ind. Electron.

544

238

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AbstractMultiphase variable-speed drives and generation systems (systems with more than three phases) have become one of the mainstream research areas during the last decade. The main driving forces are the specific applications, predominantly related to the green agenda, such as electric and hybrid electric vehicles, locomotive traction, ship propulsion, 'more-electric' aircraft, remote offshore wind farms for electric energy generation, and general high-power industrial applications. As a result, produced body of significant work is substantial, making it impossible to review all the major developments in a single paper. This paper therefore surveys the recent progress in two specific areas associated with multiphase systems, namely power electronic supply control and innovative ways of using the additional degrees of freedom in multiphase machines for various nontraditional purposes.Index TermsMultiphase variable-speed drives, ac-ac converters, inverters, PWM, multiphase power electronics, integrated on-board battery chargers.

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Sliding-mode control of a six-phase series/parallel connected two induction motors drive

Abjadi

2014

ISA Transactions

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A Two-Frequency Quasi Six-Phase Voltage Source Inverter Based on Space Vector PWM

Cited by 4 publications

References 16 publications

Speed sensorless control of a six‐phase induction motor drive using backstepping control

Speed sensorless control of a six‐phase induction motor drive using backstepping control

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Sliding-mode control of a six-phase series/parallel connected two induction motors drive

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