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公开(公告)号：US3705370A
公开(公告)日：1972-12-05
申请号：US3705370D
申请日：1971-04-15
Applicant: IBM
Inventor： CHAI HI D , MILLS STEPHEN H , PAWLETKO JOSEPH P , PETERS FRANCIS E , YOUNG CARL T
Abstract: A magnetic actuator comprises a three-legged magnetic core with an armature pivotally mounted at the middle leg to have portions on either side thereof with an abutting gap relation with one outer leg and an abutting plus a peripheral gap relation with the other. A winding on the one abutting leg provides drive flux, and a winding or permanent magnet on the other leg provides a restore or detent flux between teeth on the armature and core.
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公开(公告)号：US3867676A
公开(公告)日：1975-02-18
申请号：US39922573
申请日：1973-09-20
Applicant: IBM
Inventor： CHAI HI D , PAWLETKO JOSEPH P
CPC classification number: H02P25/08 , B41J19/305 , H02K41/03 , H02P6/006
Abstract: The poles of a variable reluctance type linear stepper motor are arranged in an odd plural number of pairs and each pole is provided with two windings. For each pole pair, one winding of the pole of the particular pair is connected in series-aiding relationship with one of the windings of the other pole of the pair. The other two windings of the particular pair of poles are also connected in series-aiding relationship. The series connected windings are selectively energizable in predetermined stepping sequences for single phase, double phase and alternate single and double phase energizing operational modes. As a result, relative motion is provided between the pole structure of the motor and its variable reluctance member. The directions of energization of the respective two series connected windings of each particular pole pair are in opposition with respect to each other. The energization is such that the change of direction of the flux through the poles is minimized between steps, thereby providing a concomitant reduction in electrical and/or heat losses.
Abstract translation: 可变磁阻型线性步进电机的极点以奇数对配置，每个极设有两个绕组。 对于每个极对，特定对的极的一个绕组与该对的另一个极的一个绕组串联连接。 特定对极的另外两个绕组也是串联的关系。 串联的绕组可以按照预定的步进顺序选择性地供电，用于单相，双相和交替的单相和双相通电操作模式。 结果，在电机的极结构和其可变磁阻部件之间提供相对运动。 每个特定极对的相应的两个串联的绕组的通电方向相对于彼此相对。 通电使得通过极的通量的方向的变化在步骤之间最小化，从而提供电和/或热损失的伴随的减少。
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Patent Agency Ranking
公开(公告)号：FR2348059A1
公开(公告)日：1977-11-10
申请号：FR7706013
申请日：1977-02-24
Applicant: IBM
Inventor： CHAI HI D , PAWLETKO JOSEPH P
Abstract: A serial line printer uses a linear stepper motor of the variable reluctance type in which the toothed stator bar acts as a guide and support for the print mechanism carrier. Sensor elements movable with the carrier sense the presence of the teeth of the stator bar and generate timing signals usable for controlling operation of the printer and the motion of the carrier. The pitch of the teeth in the stator bar is proportional to the spacing of the print locations in a line of print.
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公开(公告)号：CA1075631A
公开(公告)日：1980-04-15
申请号：CA275387
申请日：1977-03-30
Applicant: IBM
Inventor： CHAI HI D , PAWLETKO JOSEPH P
Abstract: SERIAL PRINTER WITH LINEAR MOTOR DRIVE A serial line printer uses a linear stepper motor of the variable reluctance type in which the toothed stator bar acts as a guide and support for the print mechanism carrier. Sensor elements movable with the carrier sense the presence of the teeth of the stator bar and generate timing signals usable for controlling operation of the printer and the motion of the carrier. The pitch of the teeth in the stator bar is proportional to the spacing of the print locations in a line of print.
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公开(公告)号：CA1044752A
公开(公告)日：1978-12-19
申请号：CA266617
申请日：1976-11-26
Applicant: IBM
Inventor： CHAI HI D , PAWLETKO JOSEPH P
Abstract: ROTARY STEPPER MOTOR AND METHOD OF OPERATION A three phase rotary stepper motor of the variable reluctance type comprises a rotor and an annular stator having three pairs of diametrically opposed stator poles wound with bifilar windings. The stator windings are connected so that opposed poles are energized as a pair having the same polarity. The bifilar winding is connected so that pole pairs are energized with either polarity. A two phase energization scheme is used which causes adjacent poles of two pole pairs to have opposite polarity, while the third pole pair is magnetically neutral. Every three steps of the sequence the magnetically neutral pole pair is magnetized with the reverse polarity.
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公开(公告)号：CA1003033A
公开(公告)日：1977-01-04
申请号：CA206208
申请日：1974-08-02
Applicant: IBM
Inventor： CHAI HI D , PAWLETKO JOSEPH P
Abstract: The poles of a variable reluctance type linear stepper motor are arranged in an odd plural number of pairs and each pole is provided with two windings. For each pole pair, one winding of the pole of the particular pair is connected in series-aiding relationship with one of the windings of the other pole of the pair. The other two windings of the particular pair of poles are also connected in series-aiding relationship. The series connected windings are selectively energizable in predetermined stepping sequences for single phase, double phase and alternate single and double phase energizing operational modes. As a result, relative motion is provided between the pole structure of the motor and its variable reluctance member. The directions of energization of the respective two series connected windings of each particular pole pair are in opposition with respect to each other. The energization is such that the change of direction of the flux through the poles is minimized between steps, thereby providing a concomitant reduction in electrical and/or heat losses.
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公开(公告)号：CA948256A
公开(公告)日：1974-05-28
申请号：CA139561
申请日：1972-04-12
Applicant: IBM
Inventor： CHAI HI D , MILLS STEPHEN H , PAWLETKO JOSEPH P , PETERS FRANCIS E , YOUNG CART T
Abstract: 1331212 Selective printing INTERNATIONAL BUSINESS MACHINES CORP 28 March 1972 [15 April 1971] 14419/72 Heading B6F [Also in Division H1] Hammer impression.-A magnetically operated actuator 10, e.g. for a print hammer comprises a tripartite magnetic core 12 with upper, middle, and lower legs 13, 14, 15 of which 14 has a cylindrical surface profile 16 engaging cylindrical surface profile of armature 18 pivoted about shaft 20. This has upwardly extending arm 22 defining an air gap 2 with upper leg 13 and having a hammer face impacting a ribbon and a document 26 against a movable type member 38. A hook shaped lower end of the armature forms a polepiece 32 abutting and co-operating with lower leg 15, and a permanent magnet 11 forming upper leg 13 (replaceable by an electromagnet winding, not shown) retains armature 18 in a normal rest position, while an operating winding 34 on lower leg 15 also surrounds the polepiece of armature 18 and air gap G1. A flat radial pole face of middle leg 14 co-operates and abuts with a similar face on armature 18. Pulsing winding 34 overcomes the effect of magnet 11 to rotate armature 18 closing gap G1 and operating print hammer 24, until on pulse cessation magnet 11 restores the armature to normal. In a modification (Fig. 2, not shown) the restoring magnet has pole face defining air gap G2, and also having a curved face formed with plural spaced teeth co-operating with a similar curved and toothed portion of the armature; such that the teeth are respectively displaced into overlap in the operated position and are aligned in the normal position. A mathematical analysis of the equivalent magnetic circuit is given (Figs. 3, 4, not shown). Specification 1,331,211 is referred to.
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