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Stability analysis and parameter design of bldc drive utilizing root-locus approach

01 Jan 2014-
TL;DR: In this paper, the root locus and root contours of the BLDC drive system are portrayed in order to focus on the complete dynamic response of the system and the steady state performance of the drive system has been investigated by calc ulating its steady-state error to various standard test signals.
Abstract: The demands for BLDC motor drives in industrial applications are rapidly increasing due to its high efficiency, high power factor and lower maintenance . Therefore, it is necessary to design a stable con trol system for BLDC drive system to achieve a quality p erformance. The stability is a major problem in the closed loop BLDC drive system which may cause oscillations of constant or changing amplitude. This paper spotlights the movements of characteristic ro ots of the drive system on s-plane with the variati on of system parameter gain ‘k’. The root locus and root contours of the BLDC drive system are portrayed in this paper which focuses the complete dynamic response of the system. Finally, the steady-state performance of the BLDC drive system has been investigated by calc ulating its steady-state error to various standard test signals. These analyses help a designer to easily v isualize the effects of varying various system para meters on root locations. These analyses give good potenti al design specifications for the control engineers. The Matlab software package is used to analyze the resu lts.

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Citations
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Proceedings ArticleDOI
01 Dec 2019
TL;DR: A constructive method for high power BLDC motor control parameter selection and finetuning has been proposed and effectiveness in terms of closed loop stability, disturbance rejection and reference tracking performance has been discussed.
Abstract: Permanent magnet BLDC machines are being considered for wide range of applications due to their numerous advantages. Developing stable drives meeting the application specific performance objective is very important. Selection of closed loop parameters in the case of multiloop BLDC control is crucial. Conventional control parameter tuning methods offer certain limitations. In this paper, a constructive method for high power BLDC motor control parameter selection and finetuning has been proposed. Effectiveness of proposed method in terms of closed loop stability, disturbance rejection and reference tracking performance has been discussed. For analysis and validation purpose an 88kW BLDC motor is considered.

3 citations


Cites methods from "Stability analysis and parameter de..."

  • ...Different approaches for BLDC motor modelling using MATLAB/SIMULINK® and analysis was presented by [7-8][12]....

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  • ...For PM-BLDC motor control, various control strategies and stability analysis methods were described by [6-10] but majorly have focused only on speed loop control....

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References
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Book
01 Jan 1970
TL;DR: This comprehensive treatment of the analysis and design of continuous-time control systems provides a gradual development of control theory and shows how to solve all computational problems with MATLAB.
Abstract: From the Publisher: This comprehensive treatment of the analysis and design of continuous-time control systems provides a gradual development of control theory—and shows how to solve all computational problems with MATLAB. It avoids highly mathematical arguments, and features an abundance of examples and worked problems throughout the book. Chapter topics include the Laplace transform; mathematical modeling of mechanical systems, electrical systems, fluid systems, and thermal systems; transient and steady-state-response analyses, root-locus analysis and control systems design by the root-locus method; frequency-response analysis and control systems design by the frequency-response; two-degrees-of-freedom control; state space analysis of control systems and design of control systems in state space.

6,634 citations


"Stability analysis and parameter de..." refers background or methods in this paper

  • ...3 one can calculate the steady-state error ωe(s) due to unit step input, ramp input and parabolic input [8], [9]....

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  • ...Therefore, root-locus method is used to obtain the qualitative information of stability and performanc e of the BLDC drive system [8],[9]....

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Book
01 Jan 1967
TL;DR: This book presents a control engineering methodology that, while based on mathematical fundamentals, stresses physical system modeling and practical control system designs with realistic system specifications.
Abstract: From the Publisher: For more than twenty years, Modern Control Systems has set the standard of excellence for undergraduate control systems textbooks. It has remained a bestseller because Richard Dorf and Robert Bishop have been able to take complex control theory and make it exciting and accessible to students. The book presents a control engineering methodology that, while based on mathematical fundamentals, stresses physical system modeling and practical control system designs with realistic system specifications.

3,363 citations

Journal ArticleDOI
TL;DR: This paper lays the groundwork for the development of a new low-cost IC for control of BLDC motors by implementing a simple novel digital pulsewidth-modulation control for a trapezoidal BLDC motor drive system.
Abstract: Development of advanced motor drives has yielded increases in efficiency and reliability. Residential and commercial appliances such as refrigerators and air conditioning systems use conventional motor drive technology. The machines found in these applications are characterized by low efficiency and high maintenance. A brushless dc (BLDC) motor drive is characterized by higher efficiency, lower maintenance, and higher cost. In a market driven by profit margins, the appliance industry is reluctant to replace the conventional motor drives with the advanced motor drives (BLDC) due to their higher cost. Therefore, it is necessary to have a low-cost but effective BLDC motor controller. This paper lays the groundwork for the development of a new low-cost IC for control of BLDC motors. A simple novel digital pulsewidth-modulation control has been implemented for a trapezoidal BLDC motor drive system. Due to the simplistic nature of this control, it has the potential to be implemented in a low-cost application-specific integrated circuit. The novel controller is modeled and verified using simulations. Experimental verification is carried out using field-programmable gate arrays to validate the claims presented.

253 citations


"Stability analysis and parameter de..." refers methods in this paper

  • ...The commutation of a BLDC motor is controlled using solid state commutation [1]....

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  • ...A novel digital PWM controller was presented for a BLDC motor in [1] which treats the motor as a digital system....

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Book
23 Apr 1986

189 citations

Journal ArticleDOI
TL;DR: Experimental results show that both accurate steady state and fast transient speed responses can be achieved and compared with the conventional induction motor drives for industrial blowers, the proposed PMBLDC drives can achieve much higher efficiency with less volume and weight.
Abstract: In this paper, a phase-locked-loop (PLL)-assisted internal model (IM) adjustable-speed controller for brushless DC (BLDC) motors is proposed. Major contributions include proposing a new adjustable-speed module structure of PLL controllers for BLDC motor drives and integrating an IM control strategy and a novel complete motor current sensing scheme. By employing the proposed PLL-assisted IM control method, the controller can be made more robust and accurate. In addition, due to properly integrating the motor current sensing scheme with the pulsewidth modulation control, the hardware implementation of the BLDC motor drive can be made rather compact and enable further integration into chips to reduce the cost and enhance the current regulation performance. Finally, a prototype of the proposed controller is also constructed and applied to an industrial blower to verify the feasibility of the proposed control. Experimental results show that both accurate steady state and fast transient speed responses can be achieved. Moreover, compared with the conventional induction motor drives for industrial blowers, the proposed PMBLDC drives can achieve much higher efficiency with less volume and weight.

81 citations