• Title, Summary, Keyword: Motor control

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Implementation of the BLDC Motor Speed Control System using VHDL and FPGA (VHDL과 FPGA를 이용한 BLDC Motor의 속도 제어 시스템 구현)

  • Park, Woon Ho;Yang, Oh
    • Journal of the Semiconductor & Display Technology
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    • v.13 no.4
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    • pp.71-76
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    • 2014
  • This paper presents the implementation for the BLDC motor speed control system using VHDL and FPGA. The BLDC motor is widely used in automation for its good robustness and easy controllability. In order to control the speed of the BLDC motor, the PI controller used for static RPM output of the BLDC motor to variations in load. In addition, by using the DA converter, we were able to monitor the BLDC motor reference speed and the current speed through real time. The motor speed command and the parameters of the PI speed controller were modified easily by the FPGA and the AD converter. Finally, in order to show the feasibility of the control algorithm the speed control characteristics of the motor was monitored using an oscilloscope and the DA converter. Further, the speed control system was designed in this paper has shown the applicability of the drive system of the factory automation.

Assessment of Motor Control Ability (운동조절능력의 평가)

  • Hwang, Seong-Soo;Hong, Wan-Sung
    • Journal of Korean Physical Therapy Science
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    • v.2 no.4
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    • pp.823-833
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    • 1995
  • The purposes of this review are that 1) what is the the concept of motor control, 2) what is the content of motor control assessment, and 3) which instruments or scales are used in clinical setting. Motor control is defined broadly the control of both movement and posture. And motor control focuses on understanding the control of movement already acquired. The purposes of assessment are screening, placement to apprpriate treatment program, program plan, evaluation, and progress assessment for individuals. The content of motor control assessment is included not only fexibility, tone, reflex & reaction, muscle strength, movement pattern, balance, gait, and functional ability, but also cognition, arousal, sensation, and perception. There ars many kinds of instruments or scales for assessing motor ability. Most of materials are tested the validity and reliability. But Korea has not own instrument for assessing motor ability. Therefore, Korea needs to develop the assessing tools for motor ability.

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High Speed Control of a Multi-pole Brake Motor Under a Long Current Control Period (다극 브레이크 모터의 긴 전류 제어주기 고속영역 제어)

  • Kim, Dokun;Park, Hongjoo;Park, Kyusung;Kim, Seonhyeong;Lee, Geunho
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.2
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    • pp.137-144
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    • 2015
  • In hybrid or electric vehicles, the hydraulic brake system must be controlled cooperatively with the traction motor for regenerative braking. Recently, a motor driven brake system with a PMSM (Permanent Magnet Synchronous Motor) has replaced conventional vacuum boosters to increase regenerative power. Unlike industry motor controls, additional source codes such as functional safety are essential in automotive applications to meet ISO26262 standards. Therefore, the control logic execution time increases, which also causes an extension of the motor current control period. The increased current control period makes precise motor current control challenging inhigh speed ranges where the motor is driven by high frequency. In this paper, a PWM update strategy and a time delay compensation method are suggested to improve current control and system performance. The proposed methods are experimentally verified.

The Effect of Intervention Program for Motor Control Ability in Hemiplegic Patients (편마비 환자의 운동조절 능력 향상을 위한 중재 프로그램의 효과)

  • Shin, Hong-Cheul;Kim, Woong-Gak;Kang, Jeong-Il
    • The Journal of Korean Physical Therapy
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    • v.17 no.3
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    • pp.377-390
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    • 2005
  • The purpose of this study is to investigate the effect of neuromuscular re-education program and general intervention program. It is focused on difference between changes of experimental before and after on 20 stroke patient's motor control ability. The obtained results are as follows; In change in motor control ability, neuromuscular re-education program group about the motor control ability was a significant difference(p<.01). And traditional intervention program group, the motor control ability was a significant difference in all of items (p<.01; p<.05) but, were not a significant difference in bladder management, social interaction, problem solving and memory. And also comparison of change in motor control ability between the experimental group and control group, the between-subjects factors were a significant difference. Most of the functional items on the functional items on the functional measurement and neuromuscular function measurement are concerned with the physical autonomy of the hemiplegic patients. More in depth knowledge may be acquired about the distribution of physical and motor control patterns with respect to the degree of neurologic deficit for the enhencement of residual motor control function in hemiplegia. In conclusion, the neuromuscular re-education program was more effect then traditional intervention program in motor control ability.

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Design of Indirect Vector Controller of Induction Motor using Fuzzy Algorithm and apply to the Speed Control System of Elevator (퍼지 알고리즘을 이용한 유도전동기 간접벡터제어기의 설계와 엘리베이터 속도제어 시스템의 응용)

  • 경제문;김훈모
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.110-113
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    • 2000
  • In general, speed control method of the elevator system has used motor pole change type or motor primary voltage control type. But it will change to vector control type in order to increase it's reliability, riding comfort and decrease material cost. It is the conception of vector control type in order to increase it's reliability, riding comfort and decrease material cost. It is the conception of vector control that primary current of the induction motor be controlled independently with magnetizing current(field current of DC motor) and torque current(armature current of DC motor). In this paper, by analyzing the effect of the time constant variation of rotor of the induction motor on the slip frequency type indirect vector control, a drive system for the motor will be constructed using a fuzzy slip frequency type indirect vector controller with fuzzy control method for estimating the vector time constant in the slip frequency type indirect vector control. The goal of this study is to enabling even more efficient speed control by constructing on elevator driver based on the newly developed drive system.

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Analysis and Control of a 3-Phase VR Type Self-Bearing Step Motor for Small Angle Control Considered the fringing Effect (프린징효과를 고려한 미세각도 제어용 3상 가변형 셀프베어링 스텝모터의 해석 및 제어)

  • Kim, Daegon
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.10
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    • pp.93-100
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    • 2001
  • The analysis and control of a new type unsymmetrical slotted self-bearing step motor for small angle control is presented. The motor actuator is used for both motor and bearing functionality without any additional coil windings or electromagnets for bearing functionality. A circular-arc, straight-line permeance model for the fringing effect is presented. An unsymmetrical slotted self-bearing step motor layout and control algorithm are described. A new control current generation method using the electromagnets layout geometry, which needs no additional current for bearing functionality, is proposed. As the result of this analysis the fringing effect largely influences on the system characteristics. especially in torque. Even if the bearing functionality is added into the motor functionality, it is shown that the magnitude of torque is not changed.

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FPGA Based Micro Step Motor Driver

  • Uk, Cho-Jung;Wook, Jeon-Jae
    • 제어로봇시스템학회:학술대회논문집
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    • pp.111.3-111
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    • 2001
  • Automative system and robot are operated by motor. Recently, automative system and robot need correct operation and control for precise task. Therefore they need precise motor control technology. In present, controller needs precise motor control technology in automative system and robot. Usual step motor driver that has 200 steps per revolution is not proper. So we need micro step motor driver that is more precise then usual step motor driver. In this paper, micro step motor driver is used for precise control of step motor. The goal is precise operation and location control. This micro step motor driver is A3972SB that is made in Alloegro Company. It has serial port that receives two 6-bits linear DAC value. Almost all systems generate DAC value with micro processer and ...

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The Sinusoidal Ministep Drive Technique

  • Ukakimaparn, P.;Pongswatd, V.;Kummool, S.;Sriratana. W.
    • 제어로봇시스템학회:학술대회논문집
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    • pp.466-466
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    • 2000
  • This paper presents the sinusoidal current ministep technique to drive stepping motor. The stepping motor is coupling to the increment encoder to detect the position and speed of the stepping motor. The data from the encoder is decoded to sine and cosine signal and fed to the driver system. The driver system has two loops control, the inner loop and the outer loop. The inner loop is used to control the rotating of the stepping motor and the outer is used to control the speed of the motor. The rotating of the stepping motor is controlled with the sinusoidal signal. The test results of the inner loop control can control the revolution of the stepping motor is smooth and continuously with similar to the DC motor. The outer loop uses to control the speed of the stepping motor with control the DC voltages apply to the driver. The DC voltages that apply to the driver is controlled by the AC-DC converter The test results of the outer loop control, it can control the speed of motor which is provide the any load in the design.

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Speed control of a induction motor system using digital control method (유도전동기의 디지탈 속도 제어)

  • 이충환;김상봉;하주식
    • 제어로봇시스템학회:학술대회논문집
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    • pp.987-992
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    • 1992
  • In recent years, induction motor is applied for several industrial actuatung parts instead of direct current motor because of the robust construction, nonexpensive and maintenance-free actuator etc. and having capability of speed control according to development of power electrounics and microprocessor techniques. In the paper, a microprocessor-based digital control approach for spped control of induction motor system is presented by considering a simple modelling equation as the system expression equation of induction motor and using the self tuning control and torque effdforward control method. As the model equation of the induction motor system, we use a second order differential equation which is well known in the modeling equation is induced form the control theory stand point such tath we can describe usually the motor system connected by inverter, generator and load etc. The effectiveness of the control system composed by the above mentioned design concept is illustrated by the expermental result in the presence of step reference change and generator load variation.

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Analysis and Control of an Unsymmetrical 3-Phase VR Type Self Bearing Step Motor (비대칭 3상 가변형 셀프 베어링 스텝모터의 해석 및 제어)

  • Kim, Dae-Gon
    • Journal of Institute of Control, Robotics and Systems
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    • v.7 no.10
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    • pp.806-811
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    • 2001
  • The analysis and control algorithm of a new type unsymmetrical self-bearing step motor is presented. The motor actuator is used for both motor and bearing functionality without any redundant coil windings or redudant electromagnets for bearing functionality. Self bearing step motor layout and control current generation method for unsymmetrical position of electromagnets are described. This new current generation method without additional current for bearing functionality leads to minimize the power loss. As the result of the unbalance response approach, the constant torque is possible, even though the bearing functionality is added or not.

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