• 제목/요약/키워드: Motor control method

검색결과 2,635건 처리시간 0.029초

FPGA Based Robust Open Transistor Fault Diagnosis and Fault Tolerant Sliding Mode Control of Five-Phase PM Motor Drives

  • Salehifar, Mehdi;Arashloo, Ramin Salehi;Eguilaz, Manuel Moreno;Sala, Vicent
    • Journal of Power Electronics
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    • 제15권1호
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    • pp.131-145
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    • 2015
  • The voltage-source inverters (VSI) supplying a motor drive are prone to open transistor faults. To address this issue in fault-tolerant drives applicable to electric vehicles, a new open transistor fault diagnosis (FD) method is presented in this paper. According to the proposed method, in order to define the FD index, the phase angle of the converter output current is estimated by a simple trigonometric function. The proposed FD method is adaptable, simple, capable of detecting multiple open switch faults and robust to load operational variations. Keeping the FD in mind as a mandatory part of the fault tolerant control algorithm, the FD block is applied to a five-phase converter supplying a multiphase fault-tolerant PM motor drive with non-sinusoidal unbalanced current waveforms. To investigate the performance of the FD technique, the fault-tolerant sliding mode control (SMC) of a five-phase brushless direct current (BLDC) motor is developed in this paper with the embedded FD block. Once the theory is explained, experimental waveforms are obtained from a five-phase BLDC motor to show the effectiveness of the proposed FD method. The FD algorithm is implemented on a field programmable gate array (FPGA).

외란 관측기를 이용한 리니어 BLDC 모터의 정밀위치제어 (Precise Positioning Control of Linear Brushless DC Motor using Disturbance Observer)

  • 고재원;이교범;구영모
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 D
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    • pp.2399-2401
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    • 2001
  • This Paper presents a positioning control method of the LBLDCM(Linear Brushless DC Motor) under friction. The friction may cause steady state position error. So it is necessary to consider friction effect for precision positioning control. The proposed control method uses disturbance observer algorithm and friction compensation. The experimental results of the proposed control method based on the disturbance observer are presented to show its effectiveness.

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DC 모터의 센서리스 속도제어 및 그 응용에 관한연구 (A Study on the Sensorless Speed Control and Its Application of DC Motor)

  • 하윤수
    • Journal of Advanced Marine Engineering and Technology
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    • 제23권3호
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    • pp.292-299
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    • 1999
  • DC motors are widely used in many industrial fields as the actuator of the robot and the driving power motors of the electrical vehicle, Usually in the sensors of DC motors such as the encoder the tachogenerator and the potentiometer etc. are applied, But usage of these sensors results in the increased price and operating cost such that the application of the motors are limitted. To solve this problem another method to construct low cost control system is investigates. In this paper a new speed control method for DC motor is proposed. This method uses motor parameters instead of using speed or position sensors. In this way the angular velocity is estimated by the measure-ment values of the armature voltage and current instead of measuring the sensor signal. This paper presents an alorithm for estimating the angular velocity of DC motor The effectiveness of the proposed method is verified by experimental results. Also the applicability of the proposed method is presented by applying to the velocity contol of a wheeled mobile robot.

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브러시리스 영구자석 전동기의 새로운 순시토오크 제어 방법 (A Novel Instantaneous Torque Control Scheme of Brushless Permanent Magnet Motor)

  • 최근국;박한웅;박성준;원태현;송달섭;이만형
    • 제어로봇시스템학회논문지
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    • 제5권7호
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    • pp.862-867
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    • 1999
  • In general, the realization of high performance brushless permanent magnet motors which are widely used in servo drive is focused on the linear control for ripple-free torque. This is also the main problem that should be solved in all AC motors including induction motor to achieve high performance control, and recent papers deal with this problem. In this paper, the novel optimal excitation scheme of brushless permanent magnet motor producing loss-minimized ripple-free torque based on the d-q-0 reference frame is presented including 3 phase unbalanced condition. The optimized phase current waveforms that are obtained by the proposed method can be a reference values and the motor winding currents are forced to track it by delta modulation technique. As a results, it can be shown that the proposed work can minimize the torque ripple by the optimal excitation current for brushless permanent magnet motor with any arbitrary phase back EMF waveform. Simulation and experimental results prove the validity and practical applications of the proposed control scheme.

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MRAS 기법을 이용한 권선형 유도전동기의 속도센서리스 벡터제어 (Speed Sensorless Vector Control of Wound Induction Motor Using a MRAS Method)

  • 최현식;이재학;엄태욱
    • 대한전자공학회논문지TE
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    • 제42권1호
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    • pp.29-34
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    • 2005
  • 권선형 유도전동기는 기동시에 충분히 큰 저항을 외부에서 삽입하여 기동전류를 작게하는 동시에 기동토크를 크게 할 수 있다. 또한, 유도전동기의 각 기동방식중에서 가장 우수한 시동특성을 가지고 있으며 크레인, 시멘트공장 등 중부하 시동이 요구되는 경우 널리 사용되고 있다. 권선형 유도전동기 드라이브 시스템의 전류, 토크, 위치 및 속도 등의 제어를 위하여 일반적으로 산업현장에서는 PI 제어기가 많이 적용되고 있다. 그러나 이러한 시스템은 센서 부착시 여러가지 환경적 제약으로 인한 전체시스템의 성능 저하를 가져올 수 있어 이를 개선하기 위한 센서리스 벡터제어가 활발히 연구되고 있다. 본 논문은 권선형 유도전동기의 센서리스 벡터제어를 위해 MRAS 기법을 적용하였고, 기존 MRAS에 의한 유도전동기 속도 센서리스 제어시 발생하는 저항 값의 변화에 따른 저속 영역에서의 속도 특성 악영향을 개선키 위해 권선형 유도전동기의 고정자 저항과 회전자 저항 값을 추정하는 제어 알고리즘을 추가하여 시스템의 동특성 개선을 시도하였다. 제안된 기법의 타당성 및 유효성을 컴퓨터 시뮬레이션으로 확인하였다.

Software Bang-Bang 제어기에 의한 직류 직권 전동기 전류제어 (Current Control of DC Series Wound Motor for Software Bang-Bang Controller)

  • 배종일;김정수;이영일
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 하계학술대회 논문집 D
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    • pp.2180-2181
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    • 2002
  • This paper try to become a height efficiency control method of the DC series wound motor which the forklift have been used by the Software Bang-Bang controller. We used and studies the DC series wound motor by SBB control and PI control.

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중성점을 사용하지 않는 BLDC 전동기 센서리스 제어 기법 (Sensorless Control Method of the BLDC Motor Without Neutral Point)

  • 심광렬;안정렬
    • 전기학회논문지P
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    • 제61권3호
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    • pp.111-115
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    • 2012
  • Generally, brushless DC motor(BLDCM) driving system uses hall sensors or encoders as the mechanical position or speed sensor. It is necessary to achieve the informations of rotor position for driving trapezoidal type brushless DC motor without any position sensor. In this paper, the commutation signals are obtained without the motor neutral voltage, multistage analog filters, A/D converters, or the complex digital phase shift circuits which are indispensable in the conventional sensorless control algorithms. In the proposed method, in stead of detecting the zero crossing point of the nonexcited motor back electromagnetic force for the average motor terminal to neutral voltage, the commutation signal are extracted directly from the specific average line to line voltage with low-pass filter, adder and comparators circuit. In contrast to conventional methods, the neutral voltage is not need; therefore, the commutation signals are insensitive to the common mode noise. Moreover, the complex phase shift circuit can be eliminated. The effectiveness of the proposed method is verified through simulation results.

토크분배함수를 이용한 SRM 윈치 시스템의 운전특성 개선 (Driving Characteristics Improvement of SRM Winch System using Torque Sharing Function)

  • 안영주
    • Journal of Advanced Marine Engineering and Technology
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    • 제31권4호
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    • pp.433-440
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    • 2007
  • In this paper a new dynamoelectric winch system is introduced which is widely applied in shipping. building, architecture and so on. Generally in the winch system the squirrel cage induction motor is used as prime mover and line voltage is directly applied to the induction motor during operation. So it is difficult to obtain the smoothing revolution. because of variation of the weight of cargo and system operating method. Based on above reasons, the switched reluctance motor (SRM) is proposed to replace the induction motor because of more reliable mechanical structure, better traction characteristic and higher efficiency compared to induction motor. And in order to solve smoothing revolution problem, instantaneous torque control method based on torque sharing function (TSF) is used. Finally the validity of the proposed method is verified through the simulation and experimental results.

Study on the I-PD Position Controller Design for Step Motor Drives

  • Yoshida, Ryo;Hirata, Yoshinori;Ochiai, Yasuzumi
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2004년도 ICCAS
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    • pp.536-539
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    • 2004
  • In this paper, a brief discussion on I-PD position controller design for step motor drive is presented. The proposed method mainly focuses on the robustness property of the controller, which is very important for this type of system in which the variation of external load affects plant parameters. It is considered in this paper that two types of controller design methods namely; Coefficient Diagram Method (CDM), and arbitrary Pole Assignment Method (PAM) are treated and compared them. The control plant chosen for our study is a SM inherently is comprised of some non-linear elements. A the scope of the design method is limited to only linear time invariant systems, the SM modeling is approximated to linear system.

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Autotuning fuzzy PID controller for position control of DC servo motor

  • Park, Jong-Kun;Lim, Young-Cheol;Cho, Kyeng-Young;Ryoo, Young-Jae;Oh, Dong-Hwan;Wi, Seog-O;Lee, Hong-Soo
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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    • pp.257-262
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    • 1994
  • This paper describes an autotuning fuzzy PID controller for a position control of DC serve motor. Because ZNM(Ziegler-Nichols Method) with relay feedback has the difficulty in re-tuning the PID parameters and adaptive method has complex algorithm, a new method to overcome those problems is required. The proposed scheme determines the initial PID gains by using ZNM with relay feedback, and then re-tunes the optimal PID parameters by using fuzzy expert system whenever control conditions are changed. To show the validity of the proposed method, a position control of DC servo motor is illustrated by computer simulation and is experimented by a designed controller.

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