• Title, Summary, Keyword: stepping motor

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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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Stepping motor controlling apparatus

  • Le, Ngoc Quy;Jeon, Jae-Wook
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1858-1862
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    • 2005
  • Stepping motor normally operates without feedback and may loss the synchronization. This problem can be prevented by using positional feedback. This paper introduces one method for closed loop control of stepping motor and a method for combining full-step control and micro-step control. This combination controlling apparatus can perform position control with high accuracy in a high speed, so that it will not suffer from vibration (or hunting) problem when stopping motor. Controlling apparatus contains a position counter block for detecting rotor position of stepping motor, a driving block for supplying current to windings of stepping motor, a control block for comparing output signal of position counter block with command position (desired position) and outputting current command signal based on deviation between current position and command position of rotor. To output current command signal, the control block refers to a sine wave data table. This table contains value of duty cycle of Pulse Width Modulation signal. As the second object of this paper, the process of building this data table is also presented.

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Research for Stepping Motor Using Piezoelectric Torsional Actuator (압전회전작동기를 이용한 스텝모터에 관한 연구)

  • Kim Jun Hyuk;Kim Jaehwan;Chung Dal Do
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.15 no.4
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    • pp.499-505
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    • 2005
  • In this paper, a new type of pi+ezoelectric stepping motor is designed, manufactured and tested. This motor is composed of piezoelectric torsional actuator and a pair of one-way clutch bearings. The torsional actuator consists of 16-polygonal tube of piezoceramic that can produce an angular displacement associated with shear mode. One-way clutch bearing converts oscillation of torsional actuator into a continuous stepping rotation. The proposed stepping motor does not require any conversion mechanism for stepping motion like any other motors. In the design process, the shear resonance mode of piezoelectric actuator is analyzed by using a commercial finite element analysis program, and the performance of the fabricated torsional actuator is measured. $0.124^{\circ}$ of maximum angular displacement is measured in square wave excitation on the actuator only. The stepping motor is manufactured by assembling a pair of one-way clutch bearings and the torsional actuator. The maximum rotation speed of 72rpm and the blocking torque of 3.136 mNm are measured at 3540 Hz and 100V/mm. Once the proposed piezoelectric stepping motor is miniaturized, it can be used for many compact and precise moving applications.

A study on the implementation of closed-loop system using the stepper motor back-EMF (스텝모터 역기전력을 이용한 폐루프 시스템 구현에 관한 연구)

  • Im, Sungbeen;Jeong, Sanghwa
    • Journal of the Korea Safety Management & Science
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    • v.17 no.3
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    • pp.363-370
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    • 2015
  • In this paper, the control technique of the stepping motor using back electromotive force(B-EMF) without encoder is investigated. The stepping motor generally uses the rotary encoder to detect the rotor position. Since this method increases the cost and the motor configuration size, the new closed-loop control method applied for the B-EMF was implemented by using current detect circuit, AD-converter, and micro controller unit(MCU). The control loop of stepping motor became very simplified. The current change of stepping motor measured by the amplifier was measured and analyzed, when the missing step is occurred. Based on the data from current feedback, position errors were compensated and confirmed by using AD-converter.

A Study on the Dynamic Characteristics Improvement of Linear Stepping Motor (Linear Stepping Motor의 동특성 개선에 관한 연구)

  • 이상호;노채균;김동희;오흥석;이경호;신미영
    • Proceedings of the KIPE Conference
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    • pp.295-298
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    • 1998
  • A Linear Stepping Motor(LSM) can operate in an open loop control mode similarly to a rotary stepping motor. However, the LSM has a large transient vibration, and it sometimes causes the miss-step. In this paper, vibration suppression method using an energy stored in winding inductance and induced voltage of the LSM is proposed.

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Characteristics Analysis of PM Type Stepping Motor for Idle Air Valve (Idle Air Valve용 PM형 Stepping Motor의 특성해석)

  • Kim, G.T.;Lee, J.G.;Kim, D.H.;Shin, H.K.;Moon, J.S.;Kim, T.H.
    • Proceedings of the KIEE Conference
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    • pp.88-90
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    • 1994
  • The permanent magnet type stepping motor is used widly for various devices, such as FA and OA machine. Characteristics of the stepping motor is analyzed using permeance method. Static, dynamic and I step response characteristics of PM type stepping motor for idle air valve is discussed.

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A Study of the Miniaturization of the PM type Stepping Motor (Claw-pole을 갖는 PM형 스테핑 모터의 소형화에 관한 연구)

  • Rhyu Se-hyun;Jung In-soung;Sung Ha-kyung;Kwon Byung-il
    • Proceedings of the KIEE Conference
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    • pp.929-931
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    • 2004
  • Recently, there are growing demands for permanent magnet(PM) type stepping motor that greater mechanical output, smaller size. Especially, the PM type stepping motor with claw-poles is preferred solution for many small electronics position determination devices since it is small in size, low cost. But, the design of the PM type stepping motor with claw-poles is very difficult because it has a magnetic 3-D shape. This paper deals with a study of the miniaturization of the PM type stepping motor with claw-poles. We investigate the characteristic of the actual model using the equivalent magnetic circuit method and 3-D FE analysis.

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A Speed Control of Stepping Motor Using a Self-Tuning Regulator

  • Kim, Young-Tae;Kim, Sei-Yoon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.11
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    • pp.69-75
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    • 2009
  • In this paper, a self-tuning regulator for a speed control of a permanent magnet type stepping motor is proposed. The self-tuning theory provides a nonlinear modeling of a stepping motor drive system and can provide the controller with information regarding the reference variation and parameter variation of the stepping motor through the on-line estimation. The proposed self-tuning regulator organize the positive feedback loop and IP(Integral-Proportional) type. Therefore, the proposed self-tuning regulator has a robust control capabilities during dynamic operation. The availability of the proposed controller is verified through experimental results.

The Study on the design of Claw Pole Stepping Motor considering Axial flux (축 방향 자속을 고려한 Claw pole 스테핑 모터 설계에 관한 연구)

  • Jung, Dae-Sung
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.9
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    • pp.28-34
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    • 2014
  • A claw pole stepping motor is widely used in various fields such as a compact optical disk drive, computer peripherals, digital cameras, office automation(OA), handheld mobile devices, because it has the suitable structure for compact motor. However 3D analysis is essential for design of Claw pole stepping motor because of axial flux path. Thus, in general, it takes a lot of time in the design of Claw pole motor. In this paper, magnetic equivalent circuit considering axial flux was proposed to reduce design time of Claw pole motor and we has designed by using the magnetic equivalent circuit. In addition, in oder to verify the study, design model was verified by 3D FEM simulation and experiment.

A Study on the Micro Stepping Drive to reduce Vibration of Step motor (스텝모터의 진동 저감을 위한 마이크로 스텝 구동에 관한 연구)

  • 신규범;이정우;오준호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.448-455
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    • 1996
  • In this study, to reduce vibration of step motor we use Microstep control. Microstep control of stepmotor is usually thought of as an extension of conventional stepmotor control technology. The essence ofmicro stepping is that we divide the full step of a stepmotor into a number of substep called microstep and cause the stepmotor to move through a substep per input pulse. In ideal case, bycontrolling the individual phase currents of a two-phase step motor sinusoidally we can get uniform torque and step angles. But due to the monlinear characteristics of the step motor, we need to compensate current waveform to improve the overall smoothness of the conventional micro stepping system. We implement digital Pulse Width Modulation(PWM) driver to drive step motor and microphone was used for detecting vibration. Driver enables speed change automatically byincreasing or decreasing micro stepping ratio which we call Automatic Switching on the Fly. To compensate the torque harmonics, Neural Networks is applied to the system and we foundcompensated optimal input current waveform. Finally we can get smooth motion of step motor in a wide range of motor speed.

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