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公开(公告)号：US3703672A
公开(公告)日：1972-11-21
申请号：US3703672D
申请日：1971-04-26
Applicant: NAT RES DEV
Inventor： BIRD BRIAN MICHAEL , RAWCLIFFE GORDON HINDLE
CPC classification number: H02P27/06
Abstract: A method of changing the speed of a three-phase induction motor by deriving from the A.C. supply a modulating wave of submultiple frequency, deriving therefrom a corresponding rectangular wave, modulating each phase of the supply by three such modulating waves, with the same sequence or opposite sequence to the supply phases. Modulation of the supply is effected by gating thyristors from the modulating waves. By varying the modulation frequency, the motor speed is varied stepwise over a speed range.
Abstract translation: 通过从交流电源提供三相感应电动机的速度的方法，通过三相这样的调制波调制每个相位的相应的矩形波，从而产生一个次多频的调制波 序列或与供应阶段相反的序列。 电源的调制通过从调制波中选通晶闸管来实现。 通过改变调制频率，电机速度在速度范围内逐步变化。
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Patent Agency Ranking
公开(公告)号：US3927358A
公开(公告)日：1975-12-16
申请号：US45685774
申请日：1974-04-01
Applicant: NAT RES DEV
CPC classification number: H02K3/28
Abstract: A 3-phase, alternating current, speed-changing electric motor or generator with speed-changing effected by pole-amplitude modification. The machine has a winding layout providing a first pole-number. The second pole-number requires the reversal in polarity of all poles in each negative half wave of a sinusoidal pole-amplitude modulation wave extending the 360* of the winding periphery. Pole-amplitudes, determined by coil-grouping, approximate to the sinusoidal amplitude of the modulation wave at the pole-locations. Pole-locations are substantially equally spaced-apart throughout, but coil-groups at the zero-amplitude positions of the modulation wave may be omitted (so-called ''''phantom'''' coil-groups). Integral coil-group values approximating closely to the sine wave amplitude values at the corresponding pole-locations, are used.
Abstract translation: 三相，交流，变速电动机或发电机，通过极振幅修正实现变速。 机器具有提供第一极数的绕组布局。 第二极数需要在绕组周边的360°延伸的正弦极 - 振幅调制波的每个负半波中的所有极的极性反转。 通过线圈分组确定的极振幅近似于极点处调制波的正弦振幅。 极点位置基本上等间隔开，但调制波的零振幅位置处的线圈组可以省略（所谓的“幻影”线圈组）。 使用近似于相应极点处的正弦波振幅值的积分线圈组值。
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公开(公告)号：US3622823A
公开(公告)日：1971-11-23
申请号：US3622823D
申请日：1970-03-11
Applicant: NAT RES DEV
Abstract: A three-phase motor with a stator winding wound on flat-sided punchings. The number of flat sides must not correspond to the pole-number. The stator slots are radial and those opposite flats on the stator punchings are shalower than those opposite the corners and in some examples are omitted. The three-phase winding used is derived from a regular double-layer, uniform-pitch, diamond coil winding by omitting blocks of coils from the top and bottom layers, the omitted coil blocks being equal in number to the flat sides, being equally spaced apart in the top and bottom layers and in coincident, overlapping or adjacent slots in the top and bottom layers.
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公开(公告)号：US3898543A
公开(公告)日：1975-08-05
申请号：US43827074
申请日：1974-01-31
Applicant: NAT RES DEV
Abstract: A 3-phase, alternating current, speed-changing electric motor, or generator, suitable for 6-terminal, series/parallel switching and with pole-changing effected by pole-amplitude modulation, having a composite 3-phase stator winding comprising two component windings; the two component windings I. HAVING CORRESPONDING COMPONENT PHASE-WINDINGS CONNECTED IN THE SAME PHASE OF THE COMPOSITE WINDING, II. BEING COMPOSED OF IDENTICAL HALVES OF A POLE-AMPLITUDE MODULATION WINDING PROVIDING THE REQUIRED OPERATING POLENUMBERS AND III. PROVIDING EQUAL, PARALLEL CIRCUITS FOR ONE POLE-NUMBER.
Abstract translation: 适用于6端子，串联/并联开关和通过极振幅调制实现极点变化的三相交流电，变速电动机或发电机，具有复合三相定子绕组，其包括两个部件 绕组; 双组分绕组I.在复合绕组的同一相中连接相应的组件相绕组，II。 组成了提供所需操作员号码的波幅调制中断的标识失败。 提供平等，平行电路一个POLE号。
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公开(公告)号：US3686553A
公开(公告)日：1972-08-22
申请号：US3686553D
申请日：1971-03-15
Applicant: NAT RES DEV
Abstract: The invention provides a three-phase self-cascaded machine with a single stator and rotor combination. Alternative forms of construction are described in that the stator may have two windings, one for each of two pole-numbers, or a single ''''polechanging'''' winding of the pole-amplitude modulation type. The rotor may be of wound type with short-circuit coils or of reluctance type with flux-barrier peripheral members or of hybrid type combining the reluctance and wound forms. All the rotor forms have similar electromagnetic characteristics in that when rotated in a magnetic field of the first stator pole-number, a field of the second stator pole-number is generated.
Abstract translation: 本发明提供了具有单个定子和转子组合的三相自级联机器。 描述了替代形式的结构，其中定子可以具有两个绕组，一个用于两个极数中的每一个，或者是一个单极“极点变换”的极振幅调制型绕组。 转子可以是具有短路线圈或具有磁通屏障周边部件的磁阻型或具有磁阻和缠绕形式的混合型的卷绕型。 所有转子形式具有类似的电磁特性，因为当在第一定子极数的磁场中旋转时，产生第二定子极数的场。
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6.发明授权Pole-changing, three-phase alternating current induction motor, with single-layer stator winding 失效单相换向，三相交流电流感应电动机，单层定子绕组
公开(公告)号：US3673477A
公开(公告)日：1972-06-27
申请号：US3673477D
申请日：1970-02-09
Applicant: NAT RES DEV
Abstract: A three-phase, two-speed pole-changing induction motor, using the pole-changing method of pole-amplitude modulation, which has a single-layer stator winding, diamond or concentric coils being used as preferred. The stator coil layout is derived from the stator coil layout of a corresponding double-layer winding for the same alternative pole-numbers. The present invention provides a two-speed, three-phase alternating current electric motor having a single layer stator winding with alternative connections providing alternative polenumbers by a modified method of pole-amplitude modulation.
Abstract translation: 使用具有单层定子绕组，金刚石或同心线圈的极振幅调制的极点变换方法的三相双速变极感应电动机。 定子线圈布局来自相同双极绕组的定子线圈布局，用于相同的替代极数。
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