公开(公告)号：US4758768A

公开(公告)日：1988-07-19

申请号：US100962

申请日：1987-09-25

申请人： Howard F. Hendricks ,  Richard C. Green

发明人： Howard F. Hendricks ,  Richard C. Green

IPC分类号： H02K29/08 ,  H02P6/08 ,  H02P6/14

CPC分类号： H02P6/14 ,  H02K29/08

摘要： A 12-step commutation in a brushless DC motor is achieved by six shaft-mounted commutation sensors and circuitry which permits inexpensive shaft-angle decoding for coil excitation. The commutation signal devices are Hall sensors arranged in two sets. A first set is arranged to produce the desired switching signals every 120 electrical degrees; a second set of three Hall sensors is similarly arranged equally spaced between the electrical switch points of the first set, however, the second set of sensors is wired together through the process of EXCLUSIVE-ORing to form a single, fourth output. Thus, the six Hall sensors are configured to produce four output signals which may be inexpensively decoded using a standard 32.times.8 PROM. A further refinement includes current modulation to the field coils in order to equalize the torque output of alternate steps. In one embodiment, this is accomplished by reducing the gain of the motor's servo amplifier so that the desired current shift is achieved by changes in the motor's load impedance.

公开(公告)号：US4227101A

公开(公告)日：1980-10-07

申请号：US912634

申请日：1978-06-05

申请人： Vahe H. Malakian ,  Howard F. Hendricks

发明人： Vahe H. Malakian ,  Howard F. Hendricks

IPC分类号： H02K37/00

CPC分类号： H02K37/00

摘要： A stepper motor is provided with an adaptor ring for establishing the desired detent position of the motor shaft. The adaptor ring is rotated to a desired mounting hole alignment with respect to the shaft and then the ring is permanently secured to the motor housing.

摘要翻译： 步进电动机设置有用于建立电动机轴的期望制动位置的转接环。 适配器环相对于轴旋转到所需的安装孔对准，然后环永久地固定到电动机壳体。

公开(公告)号：US4556811A

公开(公告)日：1985-12-03

申请号：US665082

申请日：1984-10-26

申请人： Howard F. Hendricks

发明人： Howard F. Hendricks

IPC分类号： H02K3/04 ,  H02K3/47 ,  H02K1/22

CPC分类号： H02K3/04 ,  H02K3/47

摘要： A coil unit for use in brushless and ironless armature motors which includes the form upon which the same is wound and providing, in its complete form, a self supporting coil unit which may be inserted into the laminations or soft iron shell of a motor.The complete coil unit includes a plurality of individual coils which are arranged in skewed, longitudinal, side-by-side relation to one another and the individual windings of the coils are positioned on both the inner and outer surfaces of the coil form, the inner and outer windings pairs being diametrically opposed to one another to thereby provide a pair of diametrically opposed coil portions which are connected in series aiding fashion.The coil form is a thin, longitudinally extending, tubular member of a non-magnetic material providing coil winding and locating cutouts or serrations on the longitudinal ends thereof. The cutouts provide a winding surface for the turns of the coils, the surface being angularly offset to a plane arranged radially to the axis of the coil form, and a positioning surface being angularly offset to an axially extending plane such that the last turn of one winding may lie in side-by-side relation to that of the next winding.

摘要翻译： 一种用于无刷和无铁芯电枢电动机的线圈单元，其包括其上缠绕的形式，并且以完整的形式提供可以插入到电动机的叠片或软铁壳中的自支撑线圈单元。 完整的线圈单元包括多个单独的线圈，它们彼此相互倾斜，纵向，并排设置，并且线圈的各个绕组位于线圈形式的内表面和外表面上，内部 外圈对彼此直径相对，从而提供一对沿直线相对的线圈部分，它们以串联方式连接。 线圈形式是非磁性材料的薄的纵向延伸的管状构件，其在其纵向端部上提供线圈绕组和定位切口或锯齿。 切口提供用于线圈匝的绕组表面，该表面成角度地偏移到放置在线圈形状的轴线上的平面，并且定位表面成角度地偏移到轴向延伸的平面，使得最后一圈 绕组可能与下一个绕组的并排关系。

公开(公告)号：US08310126B1

公开(公告)日：2012-11-13

申请号：US13317760

申请日：2011-10-27

申请人： Thomas H. Hopkins ,  Nicholas R. Bries ,  Scott T. Graham ,  Howard F. Hendricks ,  Patrick J. Stoever

发明人： Thomas H. Hopkins ,  Nicholas R. Bries ,  Scott T. Graham ,  Howard F. Hendricks ,  Patrick J. Stoever

IPC分类号： H02K1/14

CPC分类号： H02K1/278 ,  H02K1/148 ,  H02K3/522 ,  H02K9/19 ,  H02K9/22

摘要： A radial flux permanent magnet AC motor/generator employs a flat circular stator plate having a plurality of separately-formed electromagnets mounted in a ring pattern on a top surface thereof. A circular flux ring fabricated of powdered metal is mounted to the stator plate outside the ring of electromagnets. A plurality of permanent magnets are mounted in a ring pattern on the outer cylindrical surface of a steel rotor. The stator plate and rotor are axially and diametrically aligned such that the ring of permanent magnets rotates in close proximity to and inside the ring of electromagnets. The electromagnets utilize powder metal cores shaped to have rounded corners and flat sides that permit the use of heavier gauge windings and eliminate the air gaps that exist between the core and windings of prior art electromagnets.

摘要翻译： 径向通量永磁体交流电动机/发电机采用平面圆形定子板，其具有在其顶表面上以环形图案安装的多个单独形成的电磁体。 由粉末金属制成的圆形磁通环安装在电磁铁环外部的定子板上。 多个永磁体以环形图案安装在钢转子的外圆柱面上。 定子板和转子被轴向和直径对准，使得永磁体环在电磁铁环附近和内部旋转。 电磁铁使用形状为具有圆角和平坦侧面的粉末金属芯，其允许使用较重的表圈绕组并且消除存在于现有技术电磁体的铁芯和绕组之间的空气间隙。

公开(公告)号：US5075605A

公开(公告)日：1991-12-24

申请号：US607733

申请日：1990-11-01

申请人： Howard F. Hendricks ,  Frank S. Nolt

发明人： Howard F. Hendricks ,  Frank S. Nolt

IPC分类号： H02K21/14 ,  H02K29/00 ,  H02K29/08

CPC分类号： H02K29/08

摘要： A brushless DC motor includes a rotor having an iron core affixed to a motor shaft. Permanent magnets are affixed to the core and separated by aluminum inserts which are keyed to the core. An annular groove in one end of the rotor core is dimensioned so that its outer diameter coincides with the inner tips of the aluminum inserts. The inner diameter of the groove and its depth provide only minimal clearance around commutation transistors which occupy the space within the groove. The commutation transistors are affixed and electrically connected to a circuit board which, in turn, is secured to the motor body by attachment to a removable motor end plate. With this structure, the commutation transistors are surrounded on three sides by the rotor and are triggered by its drive magnets. This structure permits the commutation transistor to be triggered by a strong magnetic flux which is more accurately directed through the transistor at its switch plane.

公开(公告)号：US5012167A

公开(公告)日：1991-04-30

申请号：US488478

申请日：1990-03-30

申请人： Howard F. Hendricks

发明人： Howard F. Hendricks

IPC分类号： H02P6/14

CPC分类号： H02P6/14

摘要： 12-step motor commutation is provided by a three-phase sinusoidal signal generator and related circuitry. Circuitry which compares the voltage outputs of two primary signals provides two additional switching points for every 360 electrical degrees. Three comparator circuits provide six additional switching points. Primary voltage outputs are weighted in the ratio of 2:1 prior to comparison.

摘要翻译： 12步电动机换向由三相正弦信号发生器和相关电路提供。 比较两个主要信号的电压输出的电路为每360度的电度提供两个额外的切换点。 三个比较器电路提供六个额外的开关点。 在比较之前，主电压输出以2：1的比例加权。