[특허]Linear motor control system and method of use

Linear motor control system and method of use 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-008/14
출원번호	US-0130821 (1993-10-04)
발명자 / 주소	Mazzara Samuel M. (Livonia MI) Ogletree Richard (Southfield MI) Martin Scott A. (Rockford IL)
출원인 / 주소	Ford Motor Company (Dearborn MI 02)
인용정보	피인용 횟수 : 28 인용 특허 : 0

초록 ▼

A control system that increases apparent linear motor stiffness and faster frequency for a digital electronic drive of one or more brushless DC linear motors. It comprises a position transducer providing an analog electrical signal indicative of the linear position of a movable part of the linear motor and being induced from an electrical signal supplied to or derived from the motor field winding; a converter for changing the analog signal to an acceleration feedback signal; a processor for providing a position error electrical signal derived by computing the difference between the actual position feedback signal and a position reference signal; and a processor for providing a velocity error electrical signal derived from the difference between the first derivative of the position error electrical signal and the actual velocity feedback signal to produce a velocity command signal, and for providing an acceleration error electrical signal derived from the difference between the second derivative of the position feedback signal and the actual acceleration feedback signal to produce a motor command signal to the field winding of the motor. A method of using such control system comprises providing a positioning apparatus having stacked movable members interconnected by linear motors to promote three-axis movement of a ram acting as the last of said movable members and carrying out the functions of the control for each linear motor.

대표청구항 ▼

A control system for a brushless DC linear motor having fixed and movable linear motor parts, one of the parts having electrical field windings through which voltage and current are varied to affect positional control of the movable motor part comprising: (a) position transducer providing an analog electrical signal and indicative of the linear position of said movable part and being induced from an electrical signal supplied to or derived from said motor field winding, said position transducer having a pair of windings with predetermined pitch, one winding receiving an electrical signal derived from that supplied to said field winding, and the other winding having an induced analog electrical signal based on the relative position of said windings to each other, (b) a digital converter for changing said analog signal to an actual digital feedback signal, a velocity feedback signal, and an acceleration feedback signal; (c) means for providing a compensated position error electrical signal derived by computing the difference between said actual position feedback signal and a computer programmer position reference signal and compensating such error signal; and (d) means close-coupled to said linear motor (i) for providing a velocity error electrical signal derived from the difference between the first derivative of said position error electrical signal and said actual velocity feedback signal to produce a velocity command signal, and (ii) for providing an acceleration error electrical signal derived from the difference between the second derivative of the position feedback signal and said actual acceleration feedback signal to produce a motor command signal to said field winding of said motor.

이 특허를 인용한 특허 (28)

Theunissen, William S.; Grabinger, Cory L.; McMillan, Scott D., Actuator position switch.
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McMillan,Scott D.; Sibilski,Robert J., Actuator with feedback for end stop positioning.
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Neff Edward A. ; Sheaffer Michael S. ; Ferris Michael A. ; Huang David ; Haidos Steven ; Boyle Kieran ; Stom Dennis, Control processes for linear voice coil actuator.
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Pflager William ; Metzler Joel, Drive and support for machine tools.
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Sanchez, Rene, Frequency selective iterative learning control system and method for controlling errors in stage movement.
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Gonzalez Cesar, Fully enclosed linear motor armature.
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Watakabe, Takeshi; Aizawa, Naoyuki, Information processing apparatus.
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Chen, Kuan-Cheng; Lin, Yung-Hsu, Light emitting diode driver having a logic unit for generating a frequency control signal.
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Bushey, Bruce; Erko, Robert; Haeg, John; Milun, Richard; Schwartz, Terry, Linear actuator control structure.
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Bushey, Bruce; Schwartz, Terry; Milun, Richard; Erko, Robert; Haeg, John, Linear actuator control structure.
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Itoh Hiroshi,JPX, Linear motor apparatus, and stage apparatus, exposure system and device production method using the linear motor apparat.
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Ferrari, Maurizio; Massari, Carlo, Machine tool.
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Rehm,Thomas J.; Schmidt,Peter B.; Golownia,John Joseph, Method and apparatus for providing optimal acceleration feedback.
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David Allen Topmiller, Method and apparatus for synthesizing an incremental signal.
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Chaffee Mark A. (Etna NH) Rehm Thomas J. (Mequon WI), Method and apparatus for tuning a motion control system.
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Rehm, Thomas J.; Schmidt, Peter B., Method and apparatus to compensate for cyclic load disturbances in a control system.
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Sieber,Bernd; Oedl,G？nter, Method and circuit arrangement for the sensorless determination of load states of synchronous linear motors.
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Maier-Landgrebe, Rolf, Method for controlling the rotational speed of a motor.
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Kalender, Tomas, Method for position and/or speed control of a linear drive.
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Polcuch,Eric A., Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member.
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McMillan,Scott D., Method of operating a brushless DC motor.
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Rehm,Thomas J., Motor drive with velocity noise filter.
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Rehm,Thomas J., Motor drive with velocity-second compensation.
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Topmiller, David Allen, Programmed method and apparatus for quadrature output sensors.
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Topmiller,David Allen, Programmed method and apparatus for quadrature output sensors.
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Janosky Mark S. ; Lindsay Kenneth A., Slow-speed servomechanism.
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Weaver, Randy; Huang, David; Vu, Toan; Ferris, Michael A.; Neff, Edward A., System monitor for a linear/rotary actuator.
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Alley, Daniel Milton, Systems and methods for monitoring input signal parameters.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Linear motor control system and method of use 원문보기

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Linear motor control system and method of use 원문보기

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