Direct Torque Control of Brushless DC Motor with Non-sinusoidal Back-EMF

Öztürk, Salih Barış; Toliyat, H.A.

doi:10.1109/iemdc.2007.383571

Cited by 65 publications

(27 citation statements)

References 9 publications

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“…While the torque and the stator flux-linkage in Fig. 1 are basically controllable, satisfactory performance can be achieved with torque control alone, resulting in a simpler control strategy [11] [20]. Therefore, the switching signals of the inverter in this work is mainly determined according to the torque status τ and the sector in which the stator flux-linkage vector lies during the sampling interval, whilst the stator flux-linkage status φ is virtually set as zero.…”

Section: Dtc Of Pm Bldc Drivesmentioning

confidence: 99%

Analysis and mitigation of torsional vibration of PM brushless DC drives with direct torque controller

Zhu

Leong

2011

2011 IEEE Energy Conversion Congress and Exposition

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In this paper, the stator torsional vibration of a direct-torque-controlled permanent magnet brushless DC drive is investigated. To facilitate the analysis, a new method to measure the torsional mechanical transfer function of the drive system by utilizing the cogging torque as a constant excitation source is presented. Experimental investigation reveals that the torsional vibration in the prototype brushless DC drive is mainly attributed to cogging torque and commutation torque ripple, and it consists of harmonics at frequencies multiple of 6f e , with different amplitudes affected by the magnitude of torque harmonics and the structural transfer function of the stator-mounting assembly. Alternate torque-ripple compensative strategies are studied and their effectiveness in minimizing torsional vibration is validated experimentally.Index Terms-brushless dc machine, torsional vibration, direct torque control, permanent magnet.

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Section: Dtc Of Pm Bldc Drivesmentioning

confidence: 99%

Analysis and mitigation of torsional vibration of PM brushless DC drives with direct torque controller

Zhu

Leong

2011

2011 IEEE Energy Conversion Congress and Exposition

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“…The three-phase voltage converter circuit is usually used in BLDCM control system [4] , which was shown in Figure 1. In the two phase conduction mode, any time has two switches turned on and each switch conducting 120 °.…”

Section: The Direct Torque Control Theory For Brushless DC Motormentioning

confidence: 99%

Research on torque direct control method for brushless DC motors with non-ideal back EMF waveforms

Sun

2011

2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC)

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The torque of brushless DC motor (BLDCM) with non-ideal back EMF waveforms fluctuates in terms of theory. This paper puts forward that the turn-off phases don't affect the voltage vector and the flux-linkage by analyzing the voltage vector and the flux-linkage control theory of BLDCM. Then, a torque direct control method for BLDCM with non-ideal back EMF waveforms was presented, which can reduce the torque ripple by compensating the phase current. The simulation results validate the feasibility of the control strategy.

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“…Furthermore, it has been shown that using U 0 only to decrease electromagnetic torque could have some disadvantages, such as generating more frequent and larger spikes on phase voltages, which would deteriorate the trajectory of the stator flux linkage locus, increase switching losses, and contribute to large common-mode voltages that could damage motor bearings [10].…”

Section: Proposed Dtc Containing Equivalent Zero-voltage Vectorsmentioning

confidence: 99%

“…It has been shown that a conventional DTC operating in two-phase conduction mode is simplified to just a torque controlled drive. This is done by intentionally keeping stator flux linkage amplitude almost constant by eliminating flux control in a constant torque region [10]. Therefore, flux error ϕ is always selected as zero in the voltage vector selection lookup table, and only torque error τ is used, depending on the error level of actual torque relative to reference torque.…”

Section: Conventional Dtcsmentioning

confidence: 99%

See 1 more Smart Citation

An Improved DTC for In-wheel BLDC motors in Micro All-electric Vehicles

Liu

Zhang

2016

Automatika

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Original scientific paperThe micro all-electric vehicle pertaining to this study is rear-driven, with motors in the left and right rear wheels. The motors are brushless dc (BLDC) using Hall effect sensors with a trapezoidal back-electromotive force. The control system is developed by using a digital signal processor. To thoroughly utilize the fast torque generation feature of BLDC motors, direct torque control (DTC) is preferable, but with conventional DTC, dead-time must be added. This paper proposes an improved DTC, where the switching device operating principle is equivalent to that of a unipolar pulse width modulation (PWM) technique named PWM-ON. Dead-time is not required, and switching losses are reduced. Further analysis showed that under the improved DTC the dc supply took up only the load current, confirming that there was no return of load energy to the dc supply, which protects the batteries. Experimental results are given to confirm validity. Key words: BLDC, dead-time, DTC, electrical vehicle, micro all-electric vehiclesUnaprije enje direktnog upravljanja momentom istosmjernog motora bezčetkica u kotaču za mala električna vozila. Električno malo vozilo razmatrano u ovomečlanku ima pogon na stražnje kotače, gdje su motori smješteni u lijevi i desni stražnji kotač. Motori su istosmjerni bezčetkica (BLCD) te koriste senzore zasnovane na Hallovom efektu s trapezoidalnom elektromotornom silom. Upravljački sustav razvijen je na digitalnom raču-nalu. Kako bi se iskoristila mogućnost stvaranja bzrog momenta, što je jedno od prednosti BLCD motora, preferira se direktno upravljanje momentom (DTC), ali kod konvencionalnog DTC-a potrebno je dodati mrtvo vrijeme. U ovomečlanku je predložena unaprije ena verzija DTC-a, gdje princip rada invertora isti kao i kod unipolarne pulsnoširinske modulacije (PWM-ON). U ovome slučaju mrtvo vrijeme nije potrebno te se smanjuju gubici u invertoru. Daljnja analiza je pokazala da s unaprije enim DTC-om nema povratka energije, što štiti baterij. Eksperimentalni rezultati su dani kako bi se potvrdila ispravnost pristupa.Ključne riječi: istosmjerni motor bezčetkica, mrtvo vrijeme, direktno upravljanje momentom, električna vozila, mala električna vozila

show abstract

Direct Torque Control of Brushless DC Motor with Non-sinusoidal Back-EMF

Cited by 65 publications

References 9 publications

Analysis and mitigation of torsional vibration of PM brushless DC drives with direct torque controller

Analysis and mitigation of torsional vibration of PM brushless DC drives with direct torque controller

Research on torque direct control method for brushless DC motors with non-ideal back EMF waveforms

An Improved DTC for In-wheel BLDC motors in Micro All-electric Vehicles

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