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1. 发明申请

US20190190424A1 Apparatus and Method For Sensorless Detection of Load Torque of a Stepper Motor and for Optimizing Drive Current for Efficient Operation 审中-公开
公开(公告)号：US20190190424A1
公开(公告)日：2019-06-20
申请号：US16180751
申请日：2018-11-05
申请人： Microsemi SoC Corp.
发明人： Battu Prakash Reddy , Ashwin Murali
IPC分类号： H02P21/22 , H02P25/03
CPC分类号： H02P21/22 , H02P8/00 , H02P25/03
摘要： A method for controlling the drive current in a stepper motor includes measuring stepper motor current, computing a load angle of the stepper motor, calculating a torque ratio of the stepper motor, generating a reference current as a function of the torque ratio and a maximum current setting for the stepper motor, and setting the drive current of the stepper motor as a function of the reference current.

2. 发明申请

US20180159415A1 SWITCHED RELUCTANCE MACHINE (SRM) WITH PARALLEL FLUX PATH 审中-公开
公开(公告)号：US20180159415A1
公开(公告)日：2018-06-07
申请号：US15575495
申请日：2016-05-24
申请人： Aditya Auto Products & Engg. (I) Pvt. Ltd.
发明人： Srinivas KUDLIGI
IPC分类号： H02K37/02 , H02K19/10 , H02K19/24 , H02K1/14 , H02K1/24 , H02P8/00 , H02P25/08
CPC分类号： H02K37/02 , H02K1/14 , H02K1/246 , H02K19/103 , H02K19/24 , H02P8/00 , H02P8/005 , H02P8/42 , H02P25/08 , H02P25/0925
摘要： A Switched Reluctance Machine (SRM) assembly is provided. The assembly comprises a stator with a plurality of stator poles with a coil wounded on each stator pole. Each of the plurality of stator poles comprises a plurality of sub-poles integrally formed therewith, and the plurality of sub-poles provide the closest interface between the stator and the rotor. Further, two coils of an opposing pair of stator poles are energized during an excitation phase which is configured to create a flux path between each of the plurality of opposing sub-poles of the energized stator poles. The rotor of the assembly comprises a plurality of poles extending from a surface to provide the closest interface between the rotor and stator. Further, the plurality of stator sub-poles and the plurality of rotor poles are arranged to provide a commutation angle for the SRM assembly less than 15 degrees.

3. 发明授权

US09906179B1 Motor drive control device and motor drive control method 有权
公开(公告)号：US09906179B1
公开(公告)日：2018-02-27
申请号：US15261195
申请日：2016-09-09
申请人： Kabushiki Kaisha Toshiba
发明人： Hideki Kimura
IPC分类号： G05B5/00 , H01H7/08 , H02P1/04 , H02P3/00 , H02P21/22 , H02P27/08 , H02P8/00
CPC分类号： H02P21/22 , H02P8/00 , H02P27/08
摘要： According to one embodiment, a motor drive control device includes a PWM control circuit that generates PWM signals corresponding to a predetermined exciting current pattern, an H bridge circuit that is constituted of switch transistors whose on/off is controlled by the PWM signals, a coil to which an exciting current is supplied from the H bridge circuit, and a current detection circuit that detects a current flowing into the coil. A value of a parameter of the exciting current pattern is corrected by using the detection result of the current detection circuit.

4. 发明申请

US20170038587A1 DISPLAY DEVICE 有权
标题翻译：显示设备
公开(公告)号：US20170038587A1
公开(公告)日：2017-02-09
申请号：US15303361
申请日：2015-04-15
申请人： NIPPON SEIKI CO., LTD.
发明人： Ryoichi ISHIBASHI , Satoshi KOBAYASHI , Norihiko USHIDA , Yoshiko ADACHI
IPC分类号： G02B27/01 , G02B26/08 , H02P8/00 , B60K35/00
CPC分类号： G02B27/0149 , B60K35/00 , B60K37/02 , B60K2350/2065 , B60K2350/352 , G02B7/182 , G02B7/198 , G02B26/08 , G02B26/0816 , G02B27/01 , G02B27/0179 , G02B27/14 , G02B2027/0154 , G02B2027/0159 , G02B2027/0161 , G02B2027/0163 , G02B2027/0181 , G02B2027/0185 , G09G3/001 , G09G5/32 , G09G2300/04 , G09G2380/10 , H02P8/00 , H02P8/22 , H02P8/24
摘要： A display device includes: a stepping motor; a concave mirror that moves in accordance with the operation of the stepping motor, the concave mirror reflecting display light emitted from a display unit toward the windshield; a lever part that moves together with the concave mirror; a drive unit for driving the stepping motor by a microstep drive system; a control unit for controlling the movement of the concave mirror by controlling the drive unit; and a stopper unit provided within the range of movement of the lever part. The drive unit is configured to detect the counter-electromotive force generated by the stepping motor when the lever part comes into contact with the stopper unit. The control unit determines the reference position when the movement of the concave mirror is controlled in accordance with the counter-electromotive force detected by the drive unit.
摘要翻译：显示装置包括：步进电机; 根据步进电动机的动作移动的凹面镜，将从显示部发出的显示光反射到挡风玻璃的凹面镜; 与凹面镜一起移动的杆部; 用于通过微步驱动系统驱动步进电机的驱动单元; 控制单元，用于通过控制驱动单元来控制凹面镜的移动; 以及设置在所述杆部的移动范围内的挡块单元。驱动单元被配置为当杆部与止动单元接触时，检测步进电机产生的反电动势。当根据由驱动单元检测到的反电动势来控制凹面镜的运动时，控制单元确定参考位置。

5. 发明授权

US07852025B2 Electronic commutator circuits 有权
标题翻译：电子换向器电路
公开(公告)号：US07852025B2
公开(公告)日：2010-12-14
申请号：US11636898
申请日：2006-12-11
申请人： Allan David Crane
发明人： Allan David Crane
IPC分类号： H02P6/00
CPC分类号： H02P8/00 , H02P25/024 , H03K17/06 , H03K2217/0036
摘要： The present invention provides an electronic commutator circuit for use with a stator winding of an electrical machine. The stator winding of the electrical machine includes a number of coils linked by the same number of points of common coupling. The electronic commutator circuit comprising the same number of switching stages, each switching stage being connected between a respective one of the points of common coupling and first and second dc terminals. Each switching stage further includes a first reverse blocking semiconductor power device (such as a Reverse Blocking Gate Turn Off Thyristor (RB-GTO 1) capable of being turned on and off by gate control having its anode connected to the first dc terminal, and a second reverse blocking semiconductor power device (RB-GTO 2) capable of being turned on and off by gate control having its cathode connected to the second dc terminal.
摘要翻译：本发明提供一种与电机的定子绕组一起使用的电子换向器电路。电机的定子绕组包括通过相同数量的公共耦合点连接的多个线圈。电子换向器电路包括相同数量的开关级，每个开关级连接在公共耦合的相应一个点和第一和第二直流端子之间。每个开关级还包括能够通过其阳极连接到第一直流端子的栅极控制而导通和关断的第一反向阻断半导体功率器件（诸如反向阻断门极关断晶闸管（RB-GTO1）），以及第二反向阻挡半导体功率器件（RB-GTO 2），其能够通过其阴极连接到第二直流端子的栅极控制而导通和截止。

6. 发明授权

US07456625B2 Electric circuit 有权
标题翻译：电路
公开(公告)号：US07456625B2
公开(公告)日：2008-11-25
申请号：US11559435
申请日：2006-11-14
申请人： Hajime Kimura , Yasuko Watanabe
发明人： Hajime Kimura , Yasuko Watanabe
IPC分类号： G05F5/00 , G05F1/40 , G05F1/44
CPC分类号： H03K17/6871 , H02M7/538 , H02P8/00 , H03K17/145 , H04L25/0264
摘要： As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a variation of a threshold voltage and mobility of a transistor.This invention provides an electric circuit which used a rectification type device in which an electric current is generated only in a single direction, when an electric potential difference was applied to electrodes at both ends of the device. Then, the invention provides an electric circuit which utilized a fact that, when a signal voltage is inputted to one terminal of the rectification type device, an electric potential of the other terminal becomes an electric potential offset only by the threshold voltage of the rectification type device.
摘要翻译：对于晶体管，重叠是由于制造工艺和所使用的衬底的差异导致的栅极绝缘膜的变化以及沟道形成区域中的结晶状态的变化的因素，因此发生变化的晶体管的阈值电压和迁移率。本发明提供了一种电路，当对器件的两端的电极施加电位差时，使用其中仅在单个方向上产生电流的整流型器件。然后，本发明提供一种电路，其采用如下事实：当信号电压输入到整流型装置的一个端子时，另一个端子的电位仅由整流型的阈值电压变为电位偏移设备。

7. 发明授权

US6013999A Stepper motor control that adjusts to motor loading 失效
标题翻译：步进电机控制，适应电机负载
公开(公告)号：US6013999A
公开(公告)日：2000-01-11
申请号：US160206
申请日：1998-09-21
申请人： David E. Howard , Frank J. Nola
发明人： David E. Howard , Frank J. Nola
IPC分类号： H02P8/00 , H02P8/36 , G05B19/40
CPC分类号： H02P8/00 , H02P8/36
摘要： A system and method are provided for controlling a stepper motor having a rotor and a multi-phase stator. Sinusoidal command signals define a commanded position of the motor's rotor. An actual position of the rotor is sensed as a function of an electrical angle between the actual position and the commanded position. The actual position is defined by sinusoidal position signals. An adjustment signal is generated using the sinusoidal command signals and sinusoidal position signals. The adjustment signal is defined as a function of the cosine of the electrical angle. The adjustment signal is multiplied by each sinusoidal command signal to generate a corresponding set of excitation signals, each of which is applied to a corresponding phase of the multi-phase stator.
摘要翻译：提供一种用于控制具有转子和多相定子的步进电动机的系统和方法。正弦指令信号定义电机转子的指令位置。作为实际位置和指令位置之间的电角度的函数来感测转子的实际位置。实际位置由正弦位置信号定义。使用正弦指令信号和正弦位置信号产生调整信号。调整信号被定义为电角度的余弦函数。调整信号乘以每个正弦指令信号以产生相应的一组激励信号，每个激励信号被施加到多相定子的相应相位。

8. 发明授权

US5883483A Inductance L load actuating apparatus 失效
标题翻译：电感L负载致动装置
公开(公告)号：US5883483A
公开(公告)日：1999-03-16
申请号：US743878
申请日：1996-11-06
申请人： Junichi Nagata , Junji Hayakawa , Hiroyuki Ban
发明人： Junichi Nagata , Junji Hayakawa , Hiroyuki Ban
IPC分类号： H02P8/16 , H02P8/00 , H02P8/34 , H02P8/12
CPC分类号： H02P8/34 , H02P8/00
摘要： In an actuation circuit for a stepping motor, one switching element and its associated coil are connected at one connecting point, while the other switching element and its associated coil are connected at another connecting point. A pair of switching circuits and a pair of rectifying circuits are provided between two connecting points. When one of switching elements is changed from an ON condition to an OFF condition, the voltage difference between two connecting points allows the current to flow in a designated direction through the switching circuit and the rectifying circuit combined, thereby releasing the energy stored in the coils.
摘要翻译：在用于步进电机的驱动电路中，一个开关元件及其相关联的线圈在一个连接点处连接，而另一个开关元件及其相关联的线圈在另一个连接点处连接。一对开关电路和一对整流电路设置在两个连接点之间。当开关元件中的一个从接通状态变为关闭状态时，两个连接点之间的电压差允许电流通过开关电路和整流电路在指定方向上流动，从而释放存储在线圈中的能量。

9. 发明授权

US5691613A Method for determining a rotor position of a rotary motor or linear motor, and circuit arrangement for carrying out the method 失效
标题翻译：用于确定旋转电动机或线性电动机的转子位置的方法，以及用于执行该方法的电路装置
公开(公告)号：US5691613A
公开(公告)日：1997-11-25
申请号：US652675
申请日：1996-05-28
申请人： Peter Gutwillinger
发明人： Peter Gutwillinger
IPC分类号： G01D5/12 , H02P6/00 , H02P6/18 , H02P8/00 , H02P8/38
CPC分类号： H02P6/006 , H02P6/18 , H02P8/00
摘要： A method and circuit arrangement for controlling the position of a rotor of rotary motor or a linear motor, e.g. a stepper motor, synchronous motor or the like, has at least two stator windings and a rotor with salient poles, wherein an actual value of the rotor position, e.g. the angle of rotation or the displacement of the rotor, is determined and compared to a desired value of the rotor position, with the exciting current that flows through the stator windings to move the rotor being modified in dependence on a determination of the inductance of the stator winding. The inductance is determined by superimposing the exciting current with a periodic measuring current that has a higher frequency than the operating frequency of the motor so as to prevent the measuring current from influencing the excitation of the stator winding, and by measuring the reactive voltage drop caused by the measuring current across the stator winding. Based on the measured voltage drop the inductance can be determined to provide information about the actual rotor position.
摘要翻译：一种用于控制旋转电动机或线性电动机的转子的位置的方法和电路装置，例如，步进电动机，同步电动机等具有至少两个定子绕组和具有凸极的转子，其中转子位置的实际值，例如，确定转子的角度或转子的位移，并将其与转子位置的期望值进行比较，其中流过定子绕组的励磁电流根据电感的确定来移动正被修改的转子定子绕组。电感通过将激励电流与具有比电动机的工作频率更高的频率的周期性测量电流重叠来确定，以防止测量电流影响定子绕组的激励，并且通过测量引起的无功电压降通过定子绕组上的测量电流。基于测量的电压降，可以确定电感以提供关于实际转子位置的信息。

10. 发明授权

US5298846A Drive unit for driving a stepping motor 失效
标题翻译：用于驱动步进电机的驱动单元
公开(公告)号：US5298846A
公开(公告)日：1994-03-29
申请号：US883475
申请日：1992-05-15
申请人： Michihiro Shimizu , Yasuhiro Kondo
发明人： Michihiro Shimizu , Yasuhiro Kondo
IPC分类号： H02P8/38 , G05B19/40 , H02P6/18 , H02P8/00
CPC分类号： H02P6/18 , G05B19/40 , H02P8/00
摘要： In a rotation detecting unit for detecting rotation conditions such as a rotating position and speed of a stepping motor from a rotation signal of a motor without using any external sensor such as a potentiometer or encoder, by providing detection coils a and b to the main coils A, A', B, and B' provided at the stator of a stepping motor 2, the terminal voltages E2a and E2b outputted from the detection coils a and b are sequentially subjected to a signal processing in a rotation detecting circuit 1. The rotation detecting circuit 1 is provided with an output amplifier circuit 3, a signal processing circuit 4, a subtractive calculation circuit 5 for removing unnecessary voltage components by utilizing voltages E8A, E8A', E8B, and E8B' output from a charge/discharge circuit 8, a waveform shaping circuit 6 for converting the waveform of each input signal into waveforms processable in a digital form, a diagnosing circuit 7 for diagnosing whether the motor is rotating normally, and a control circuit 9' for controlling the motor in conformity with an output of the diagnosing circuit 7, whereby a superior stepping motor control can be achieved. By further providing an application voltage subtractive calculation circuit for a subtraction of application voltage components applied to the main coils A, A', B, and B', the rotation detecting coils a and b can be eliminated.
摘要翻译：在旋转检测单元中，通过不使用电位器或编码器等外部传感器来检测来自马达的旋转信号的旋转位置以及步进马达的转速等旋转状态，通过向主线圈提供检测线圈a，b 设置在步进电动机2的定子上的A，A，B，B'，从检测线圈a，b输出的端子电压E2a，E2b依次进行旋转检测电路1的信号处理。检测电路1具有输出放大器电路3，信号处理电路4，通过利用从充电/放电电路8输出的电压E8A，E8A'，E8B和E8B'来去除不必要的电压分量的减法计算电路5，波形整形电路6，用于将每个输入信号的波形转换成可以数字形式处理的波形;诊断电路7，用于诊断电机是否正常旋转;以及控制 l电路9'，用于根据诊断电路7的输出控制电动机，由此可以实现优越的步进电机控制。通过进一步提供用于减去施加到主线圈A，A'，B和B'的施加电压分量的施加减压计算电路，可以消除旋转检测线圈a和b。

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