Two-motor single-inverter field-oriented induction machine drive dynamic performance

Joshi, Bhakti M.; Chandorkar, Mukul C.

doi:10.1007/s12046-014-0237-6

Cited by 22 publications

(17 citation statements)

References 21 publications

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“…Система побудова за принципом «ведучийведений» таким чином, що «ведучим» стає більш навантажений двигун і система керування орієнтується на його змінні стану, а той час як «ведений» двигун живиться напругою тієї ж амплітуди і частоти, що і «ведучий» двигун, проте значення його змінних стану не враховуються при розрахунку керуючих дій. У [5] запропоновано усереднений підхід до керування двома асинхронними двигунами, що живляться від одного інвертора. Отже, керування системою з двох двигунів здійснюється таким чином, начебто вона складається з одного двигуна, вал якого обертається з середньою швидкістю обертання валів двох двигунів, а по його обмоткам протікає середній струм обмоток двох двигунів.…”

Section: аналіз останніх досліджень та публікаційunclassified

Research of Scalar Control System of Two Traction Induction Motors From by One Inverter

Hvorost

Voronov

2020

MEC

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Most adjustable-speed AC drive systems are constructed in such a way that one motor receives power from one inverter and uses vector control as the basic control principle. However, in some cases there is a need to power several motors in parallel from a single inverter, that minimizes the size, weight and cost of such a system. The most common examples of such systems are rail and urban electric vehicles, where two to four induction motors are connected to drive in parallel. Control of such a system is a difficult task, especially in conditions of unbalanced loads on the motors, that can occur in conditions of different adhesion of wheels with rails. The inability to provide individual control of the motor when powered by a single inverter can lead to a decrease in the safety level of such a vehicle due to the loss of stability when changing the current value of the adhesion coefficient of individual wheel pairs. Mechanical processes in the traction system are analyzed, in which each wheel pair is driven by a separate motor powered by a common inverter. It is shown that the identity of the values of the adhesion coefficients is an important condition for the stability of such a system, that cannot be guaranteed in the actual practice of the operation of the vehicle. Therefore, the development and research of control systems that are capable of operating the system in a variety of rail / road conditions is an important direction for the further development of such systems. The structure of mathematical model of traction electromechanical system consisting of two induction motors powered by one inverter is proposed. The adjustable-speed control is based on the scalar control system, that is the easiest to implement because it does not require the estimation of the state variables of the system components. Sinusoidal pulse width modulation is selected as the switch control signal method. Operation of traction electromechanical system with scalar frequency control law is investigated by mathematical modeling. It has been proven that changing the characteristics of a single wheel pair's adhesion can lead to a loss of stability by a system that is unacceptable in terms of providing a comfortable and safe operation of the vehicle. Keywords: traction electric drive, scalar control, adhesion, mathematical model, frequency control

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Section: аналіз останніх досліджень та публікаційunclassified

Research of Scalar Control System of Two Traction Induction Motors From by One Inverter

Hvorost

Voronov

2020

MEC

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“…In addition, to control the speed of parallel connected induction motor drive and to make the drive stable for unbalanced load conditions, nonlinear programming method [11]-[12], rotor flux oriented control scheme with parameter averaging and space vector averaging [13], motors with different ratings [14]- [15], adjustable PI controllers [16], rotor flux feedback control [17], matrix converter with slip frequency vector control [18], one degree of freedom control (1DOF) and two degree of freedom control (2DOF) [19], weighted voltage vector [20], new hybrid control method (speed and torque controller) [21], speedirrelevant motors using weighted flux linkage vector control [22], smart switching technique [23], mean and master slave field oriented control [24] and PI speed and current controllers [25] were employed.…”

Section: Introductionmentioning

confidence: 99%

Single Inverter Fed Speed Sensorless Vector Control of Parallel Connected Two Motor Drive

Gunabalan

Subbiah

2016

Automatika

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Original scientific paperThis paper describes a speed sensorless vector control method of the torque for cost-effective parallel-connected dual induction motor fed by a single inverter. A natural observer with load torque adaptation is employed to estimate the speeds of the same rating induction motors connected in parallel and fed by a single inverter. The speed difference between the two induction motors for unbalanced load conditions is less in natural observer than the conventional adaptive rotor flux observer. Direct field oriented control is used to calculate the rotor angle from the estimated rotor fluxes and the mean rotor flux is kept constant by rotor flux feedback control. The simulation and experimental results of studies are demonstrated for various running conditions to prove the effectiveness of the proposed method. The closed loop speed control operation with inner current control was performed by TMS320F2812 processor.Key words: Field oriented control, Induction motor, Natural observer, Sensorless vector control Vektorsko upravljanje momentom bez korištenja senzora brzine za paralelno spojeni pogon s dva motora. U ovom radu opisano je vektorsko upravljanje momentom bez korištenja senzora brzine za paralelno spojeni dualni asinkroni motor napajan jednim inverterom. Prirodni observer s adaptacijom momenta tereta koristi se za estimaciju brzina jednakih asinkronih motora spojenih u paralelu i napajanih jednim inverterom. Razlika u brzinama izmeu dva asinkrona motora pri asimetričnim teretima je manja kod prirodnog observera, nego kod konvencionalnog adaptivnog observera toka u rotoru. Izravno vektorsko upravljanje koristi se za računanje kuta rotora iz estimiranih tokova rotora, a srednja vrijednost toka rotora održava se konstantnom korištenjem upravljanja u povratnoj vezi. Simulacijski i eksperimentalmni rezultati prikazani su za različite pogonske uvjete kako bi se pokazala učinkovitost predložene metode. Upravljanje brzinom u zatvorenoj petlji s unutanjim krugom za upravljanje strujom izvodi se u TMS320F2812 procesoru.Ključne riječi: vektorsko upravljanje, asinkroni motor, prirodni observer, vektorsko upravljanje bez senzora

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“…Sensorless control has no robustness to the parameter perturbation, and in fact, the parameters of motor vary with the change of environment [20][21][22][23]. Besides, the stability of most of the existing controllers has not been proved in theory like [9,11,[15][16][17]. Moreover, most of controllers have been designed based on the steady-state model of motor rather than the dynamic model of motor, such as [9,11,13,14,16,17], which impacts the dynamic performance of system.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, most of controllers have been designed based on the steady-state model of motor rather than the dynamic model of motor, such as [9,11,13,14,16,17], which impacts the dynamic performance of system. In addition, although motor drive systems are faced with unavoidable and unmeasurable disturbances or some parameter variations [24,25], the external disturbances and/or the uncertainty of model have not been considered in many studies like [9,11,[13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…For example, multiple induction motors fed by a single CSI‐based inverter has been achieved in [13]. Master–slave strategy (MSS) has been developed for multi‐parallel permanent magnet synchronous motors (PMSMs) in [14], and the average control has been adopted for two induction motors in [15]. Moreover, speed‐sensorless vector control has been designed in this field owning to its advantages of high performance, high reliability, low cost, and less maintenance [16, 17].…”

Section: Introductionmentioning

confidence: 99%

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Robust control of two parallel‐connected permanent magnet synchronous motors fed by a single inverter

Deng

Nian

2016

IET Power Electronics

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Two parallel-connected permanent magnet synchronous motors (PMSMs) fed by a single inverter is investigated in this study. A robust controller is designed for this system via interval matrix, and in terms of bilinear matrix inequalities, sufficient conditions for the existence of the robust controller are derived. The proposed controller not only can deal with the uncertainty of load, but also has robust to the parameter perturbation. The effectiveness of the proposed controller is proved by theory analyses and computer simulation. Besides, the simulation results show that the control performance of the proposed control strategy is better than that of the conventional master-slave strategy.

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Two-motor single-inverter field-oriented induction machine drive dynamic performance

Cited by 22 publications

References 21 publications

Research of Scalar Control System of Two Traction Induction Motors From by One Inverter

Research of Scalar Control System of Two Traction Induction Motors From by One Inverter

Single Inverter Fed Speed Sensorless Vector Control of Parallel Connected Two Motor Drive

Robust control of two parallel‐connected permanent magnet synchronous motors fed by a single inverter

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