Servo performance of a BLDC drive with instantaneous torque control

Low, T.S.; Lee, T.-H.; Tseng, King Jet; Lock, K.S.

doi:10.1109/28.126756

Cited by 64 publications

(16 citation statements)

References 5 publications

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“…This will result in a smooth rotation provided that the output current waveform accurately track the desired sinusoidal signal. However, the main problem with this method is that the controller attempts to track a time-varying signal which in general is difficult in high speeds [6]. The field oriented control can solve this problem by controlling the current signals in a new coordinate system rotating with rotor speed [5].…”

Section: Fig 1 Schematic Of Non-collocated Rotor and Statormentioning

confidence: 99%

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Speed control of non-collocated stator-rotor synchronous motor with application in robotic surgery

Mohammadi

Samsonas

Natali

et al. 2015

2015 10th Asian Control Conference (ASCC)

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Abstract-This paper introduces Non-collocated Stator-Rotor Synchronous Motor (NSRSM) as a novel actuation system for cases where the stator and rotor are required to interact across a physical barrier. The main motivation for NSRSM is in the area of laparoscopic robotic surgery whereby it is desired to actuate the manipulators across the abdominal wall, but it also has potential application in other robotic surgery procedures. The configuration of NSRSM is similar to that of permanent magnet synchronous motor (PMSM) although due to asymmetric structure of the windings around the rotor, the electromechanical model of PMSMs was developed to obtain the dynamic model of NSRSM. The field oriented control method is used to develop an appropriate model for control purposes. Then two widely used control algorithms (PI controller and linear quadratic regulator (LQR)) are used to control the rotor speed in the presence of the modelling uncertainties and load disturbances. Simulation results show that these two methods are robust.

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Section: Fig 1 Schematic Of Non-collocated Rotor and Statormentioning

confidence: 99%

“…2, and therefore remove the dependency to rotor position by projecting the system equations in d-q system that rotates at the speed of the rotor. This projection is known as Park transformation which is given by [6]:…”

Section: Field-oriented Controlmentioning

confidence: 99%

Speed control of non-collocated stator-rotor synchronous motor with application in robotic surgery

Mohammadi

Samsonas

Natali

et al. 2015

2015 10th Asian Control Conference (ASCC)

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“…However, in its implementation to a BLDC drive, the estimated torque was obtained from a lookup table, and the control algorithm did not directly involve flux control. An instantaneous torque controller based on variable structure control in the -reference frame was proposed in [5]- [7]. However, although experimental results showed that it was effective in reducing torque ripple, it was only applicable to three-phase BLDC operating in the 180 conduction mode, and not to the more usual 120 conduction mode.…”

Section: Introductionmentioning

confidence: 99%

Direct Torque Control of Brushless DC Drives With Reduced Torque Ripple

Liu

Zhu

Howe

2005

IEEE Trans. on Ind. Applicat.

232

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Abstract-The application of direct torque control (DTC) to brushless ac drives has been investigated extensively. This paper describes its application to brushless dc drives, and highlights the essential differences in its implementation, as regards torque estimation and the representation of the inverter voltage space vectors. Simulated and experimental results are presented, and it is shown that, compared with conventional current control, DTC results in reduced torque ripple and a faster dynamic response.Index Terms-Brushless dc (BLDC) drives, direct torque control (DTC), permanent-magnet motor.

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“…These features together with compact structure and cost effectiveness of the motor have made the PM BLDC drives widely accepted for motorizing many industrial equipment [1][2][3] and, nowadays, for propelling electric vehicles [4][5][6]. PM BLDC drives require injection of squarewave currents into the motor phases, synchronized with the flat portion of the trapezoidal back-emf to develop a constant torque and -at the same time-to maximize the torque-perampere ratio.…”

Section: Introductionmentioning

confidence: 99%

Vector analysis of the current commutation in PM BLDC drives

Buja¹,

Menis²,

Keshri³

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The vector approach in either stationary or synchronous plane is commonly used for the analysis of the AC drives like induction and PM brushless AC drives whilst it has been hardly ever used for the PM brushless DC (BLDC) drives. A possible reason is that they require injection of square-wave currents into the motor phases, which are non-sinusoidal in nature. Recently, the PM BLDC drives have been analyzed by the help of the vector approach in the stationary plane. This paper applies such an approach to an in-depth analysis of the operation of the PM BLDC drives during the current commutations, illustrating the potentialities of the approach in giving a better insight into the current transients and the ensuing torque characteristics. At last, two voltage control strategies proposed to eliminate the torque ripple due to the current commutations are considered, showing that they can be readily understood by the vector approach.

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Servo performance of a BLDC drive with instantaneous torque control

Cited by 64 publications

References 5 publications

Speed control of non-collocated stator-rotor synchronous motor with application in robotic surgery

Speed control of non-collocated stator-rotor synchronous motor with application in robotic surgery

Direct Torque Control of Brushless DC Drives With Reduced Torque Ripple

Vector analysis of the current commutation in PM BLDC drives

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