• Title/Summary/Keyword: motor design

Search Result 4,317, Processing Time 0.032 seconds

Nonlinear Controller for the Velocity Tracking and Rejection of Sinusoidal Disturbances in Permanent Magnet Stepper Motors (영구 자석 스테퍼 모터의 속도 추종과 외란 제거를 위한 비선형 제어기)

  • Kim, Won-Hee;Gang, Dong-Gyu;Han, Jonh-Pyo;Chung, Chung-Choo
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.60 no.3
    • /
    • pp.632-638
    • /
    • 2011
  • In this paper, a nonlinear controller is proposed to track the desired velocity and to cancel sinusoidal disturbances. The proposed method consists of a velocity tracking controller and internal model principles (IMPs). For the design of the velocity tracking controller, mechanical and electrical dynamic controllers are independently designed. For the mechanical dynamics, the velocity tracking controller generates the desired quadrature current to track the desired velocity. The current tracking controller is designed to guarantee the desired quadrature current and to regulate the direct current. Therefore, the proposed velocity tracking controller has a field-oriented control. Since the controllers of the mechanical and electrical dynamics are independently designed, the stability of the closed-loop system is demonstrated using passivity. Since both the cogging torque and DC current errors act as sinusoidal disturbances in PMSM, we use four add-on type IMPs that preserve the merits and performance of the pre-designed controller without sacrificing the closed-loop stability. The performance of the proposed method is validated via simulations.

Design of Fuzzy Logic Tuned PID Controller for Electric Vehicle based on IPMSM Using Flux-weakening

  • Rohan, Ali;Asghar, Furqan;Kim, Sung Ho
    • Journal of Electrical Engineering and Technology
    • /
    • v.13 no.1
    • /
    • pp.451-459
    • /
    • 2018
  • This work presents an approach for modeling of electric vehicle considering the vehicle dynamics, drive train, rotational wheel and load dynamics. The system is composed of IPMSM (Interior Permanent Magnet Synchronous Motor) coupled with the wheels through a drive train. Generally, IPMSM is controlled by ordinary PID controllers. Performance of the ordinary PID controller is not satisfactory owing to the difficulties of optimal gain selections. To overcome this problem, a new type of fuzzy logic gain tuner for PID controllers of IPMSM is required. Therefore, in this paper fuzzy logic based gain tuning method for PID controller is proposed and compared with some previous control techniques for the better performance of electric vehicle with an optimal balance of acceleration, speed, travelling range, improved controller quality and response. The model was developed in MATLAB/Simulink, simulations were carried out and results were observed. The simulation results have proved that the proposed control system works well to remove the transient oscillations and assure better system response in all conditions.

An Adaptive PID Controller Design based on a Gradient Descent Learning (경사 감소 학습에 기초한 적응 PID 제어기 설계)

  • Park Jin-Hyun;Kim Hyun-Duck;Choi Young-Kiu
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.10 no.2
    • /
    • pp.276-282
    • /
    • 2006
  • PID controller has been widely used in industry. Because it has a simple structure and robustness to modeling error. But it is difficult to have uniformly good control performance in system parameters variation or different velocity command. In this paper, we propose an adaptive PID controller based on a gradient descent learning. This algorithm has a simple structure like conventional PID controller and a robustness to system parameters variation and different velocity command. To verify performances of the proposed adaptive PID controller, the speed control of nonlinear DC motor is performed. The simulation results show that the proposed control systems are effective in tracking a command velocity under system parameters variation.

A controller Design using Immune Feedback Mechanism (인체 면역 피드백 메카니즘을 활용한 제어기 설계)

  • Park, Jin-Hyun;Kim, Hyun-Duck;Choi, Young-Kiu
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • v.9 no.2
    • /
    • pp.701-704
    • /
    • 2005
  • PID controllers, which have been widely used in industry, have a simple structure and robustness to modeling error. But They are difficult to have uniformly good control performance in system parameters variation or different velocity command. In this paper, we propose a nonlinear adaptive PID controller based on a cell-mediated immune response and a gradient descent learning. This algorithm has a simple structure and robustness to system parameters variation. To verify performances of the proposed nonlinear adaptive PID controller, the speed control of nonlinear DC motor is performed. The simulation results show that the proposed control systems are effective in tracking a command velocity under system parameters variation.

  • PDF

Design and Fabrication of an Ultra-low Partial Discharge Measurement System (극미소 부분방전 측정시스템의 설계 및 제작)

  • Seo, Hwang-Dong;Song, Jae-Yong;Moon, Seung-Bo;Kil, Gyung-Suk;Kwon, Jang-Woo
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • v.9 no.2
    • /
    • pp.208-211
    • /
    • 2005
  • This paper presents an ultra-low partial discharge(PD) measurement system that has been accepted as a non-destructive method to estimate electrical insulation of low-voltage electric devices. The PD measurement system is composed of a coupling network, a low noise amplifier, and associated electronics. A shielding box is used to make a better condition against electromagnetic interference. A low cut-off frequency of the coupling network was 1MHz(-3 dB). Calibration tests on laboratory set-up have shown that the PD measurement system has a stable sensitivity of 11.4mV/pC. In an application experiment on a low-voltage induction motor(5HP), we could detect 0.77pC level of partial discharge pulse at the applied voltage of AC 664 V$_{peak}$.

  • PDF

Experimental Consideration for Vibration Noise, Heat Evaluation on High Speed Mixer (고속 교반기의 진동소음, 열특성 평가를 위한 실험적 고찰)

  • Lee, Jin-Kab
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.9 no.6
    • /
    • pp.1529-1534
    • /
    • 2008
  • Recently, mixers are being widely used in the display and semiconductor company in order to mix the chemical materials. The mixer normally consists of shaft, hub, reduction gear, and driving motor. It is one of the key design factors to evaluate the dynamic characteristics caused by the rotation. In this study, the dynamic characteristics of the high speed mixer, such as vibration, noise and thermal radiation, are verified by the experiment. Through the experiment, it is shown that the structural unbalance mass of high speed mixer is the important source of the severe vibrations and maximum temperature is mixer bowl.

An Automated Machining System for Steel Flat Bar Plasma Cutting in the Small Sized Shipbuilding Industry (중소조선용 철의장 가공자동화시스템 개발)

  • Ryu, Gab-Sang;Lee, Won-Hoo
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.2
    • /
    • pp.852-857
    • /
    • 2011
  • The shipbuilding industry needs automation and mechanization to solve reduction of skilled workers and labor shortage. Ship manufacturing process is the lack of automation than standardized manufacturing field. In this paper, we design and development an process automation system for hand rail production. Mechanical parts of the cutting process was designed with efficiency, productivity and reliability, CATIA and ANSYS, the stability of the mechanical structure was confirmed. System control using a PCNC controller to provide an open and scalable, and operate using touch-screen display control and monitoring of the system was performed. The automatic system successfully passed the driving test and processing test, and it showed an excellent performance.

Fault Detection and lsolation System for centrifugal-Pump Systems: Parity Relation Approach (원심펌프 계통의 고장검출진단시스템 : 등가관계 접근법)

  • Park, Tae-Geon;Lee, Kee-Sang
    • The Transactions of the Korean Institute of Electrical Engineers A
    • /
    • v.48 no.1
    • /
    • pp.52-60
    • /
    • 1999
  • This paper deals with a fault detection and isolation scheme for a DC motor driven centrifugal pump system. The emphasis is placed on the design and implementation of the residual generatorm, based on parity relation, that provides decision logic unit with residuals that will be further processed to detect and isolate three important faults in the system;brush fault, impeller fault, and the speed sensor fault. Two process faults are modelled as multiplicative type faults, while the sensor fault as an additive one. With multiplicative fault, the implementation of the residual generator needs the time varying transformation matrix that must be computed on-line. Typical implementation methods lack in generality because only a numerical approximation around the assumed fault levels is employed. In this paper, a new implementation method using well tranined neural network is proposed to improve the generality of the residual generator. Application results show that the fault detection and isolation scheme with the proposed residual generator effectively isolates three major faults in the centrifugal pump system even with a wide range of fault magnitude.

  • PDF

A High-speed Automatic Precision Inspection System for Bolts Defects (볼트 결함 판별을 위한 고속 정밀 검사 장치 개발)

  • Oh, Choon-Suk;Lee, Hyun-Min
    • The KIPS Transactions:PartB
    • /
    • v.10B no.3
    • /
    • pp.305-310
    • /
    • 2003
  • In this paper we deal with the system design and development of the high-speed automatic precision inspection for the defects of bolts. In order to inspect bolts continuously, we used the conveyor system. Also, this conveyor includes the servo motor and encoder to achieve accurate movement. According to encoder signal, line-scan camera captures the line-by-line image of bolts and after one frame is accumulated, various parameters are calculated and inspected by image processing algorithms. Experimental results using the developed facilities are presented to demonstrate the efficiency of the proposed equipment.

Multivariable Optimal Control of a Direct AC/AC Converter under Rotating dq Frames

  • Wan, Yun;Liu, Steven;Jiang, Jianguo
    • Journal of Power Electronics
    • /
    • v.13 no.3
    • /
    • pp.419-428
    • /
    • 2013
  • The modular multilevel cascade converter (MMCC) is a new family of multilevel power converters with modular realization and a cascaded pattern for submodules. The MMCC family can be classified by basic configurations and submodule types. One member of this family, the Hexverter, is configured as Double-Delta Full-Bridge (DDFB). It is a novel multilevel AC/AC converter with direct power conversion and comparatively fewer required components. It is appropriate for connecting two three-phase systems with different frequencies and driving an AC motor directly from a utility grid. This paper presents the dq model of a Hexverter with both of its AC systems by state-space representation, which then simplifies the continuous time-varying model into a periodic discrete time-invariant one. Then a generalized multivariable optimal control strategy for regulating the Hexverter's independent currents is developed. The resulting control structure can be adapted to other MMCCs and is flexible enough to include other control criterion while guaranteeing the original controller performance. The modeling method and control design are verified by simulation results.