Brushless d.c. motor with rate control of position sensor
阅读：660发布：2022-08-10
专利汇可以提供Brushless d.c. motor with rate control of position sensor专利检索，专利查询，专利分析的服务。并且A direct rate feedback signal is provided for a magnetic flux sensor, such as a magneto-sensitive Hall effect sensor or a Magnistor, of a brushless D. C. motor by providing an independent feedback path for the sensor which path contains a stator winding which is independent from the motor excitation stator windings and which is positioned in magnetic coupled relation with the motor rotor. A differential amplifier is also provided which is associated with the Hall sensor for obtaining a differential Hall sensor voltage during rotation of the rotor which voltage is fed to the excitation windings in a separate path. Constant speed control for a brushless D. C. motor having a pair of angularly displaced magnetic flux sensors is provided by providing, in an independent feedback path for one sensor, a means having a center frequency, which means is responsive to a frequency deviation of a frequency associated with the angular velocity of the rotor from the center frequency, for providing a negative feedback signal, and a means for functionally operating on the feedback signal to produce a speed regulation signal which is supplied to both sensors.，下面是Brushless d.c. motor with rate control of position sensor专利的具体信息内容。
1. In a reversible brushless D. C. motor having a first stator winding means, a magnetic rotor rotatably positioned in magnetic coupled relation with said first stator winding means, and a magnetic flux sensor means positioned in fixed relation to said first stator winding means and in magnetic coupled relation to said rotor for sensing the magnitude of the rotor flux density as a sinusoidal function of angular position of the rotor and producing an output signal proportional thereto; the improvement comprising a second stator having a winding electrically independent from said first stator winding means and positioned in magnetic coupled relation with said rotor; and an independent proportional feedback path for said sensor means for providing a substantially instantaneous feedback response, said independent feedback path including said second stator winding, said second stator winding being connected across said sensor means so as to provide said instantaneous feedback response thereto whereby substantially instantaneous direct rate feedback control for the sensor means is provided, said direct rate feedback control being bidirectional, the output of said sensor means being coupled to said first stator winding means.
2. A brushless D. C. motor in accordance with claim 1 wherein said sensor is capable of producing a voltage which is proportional to a sinusoidal function of the combined angular position of the rotor and the angular position of the sensor with respect to the first stator.
3. A brushless D. C. motor in accordance with claim 1 wherein said magnetic flux sensor means is a Hall effect sensor means. respectively.
4. A brushless D. C. motor in accordance with claim 1 wherein said first stator comprises first and second windings electrically angularly displaced from each other and said magnetic flux sensor means comprises first and second sensors angularly displaced with respect to each other and to said First stator first and second windings, respectively.
5. A brushless D. C. motor in accordance with claim 4 wherein said second stator further comprises a second stator winding; each sensor has an associated independent feedback path for said sensor, said first sensor feedback path including said second stator first winding and said second sensor feedback path including said second stator second winding.
6. A brushless D. C. motor in accordance with claim 5 wherein said first stator windings are electrically angularly displaced 90* from each other; said sensors are positioned 90* with respect to each other and 90* with respect to the respective first stator windings, and said second stator windings, respectively, each have the magnetic axis thereof aligned with the respective associated sensor.
7. A brushless D. C. motor in accordance with claim 5 wherein said first stator windings are electrically angularly displaced 90* from each other; and said sensors are positioned 90* with respect to each other and 45* with respect to the respective first stator windings, respectively, each first stator winding having the magnetic axis thereof aligned with the respective associated sensor.
8. A brushless D. C. motor in accordance with claim 5 wherein the first and second sensors, respectively, are capable of producing a voltage which is proportional to a sinusoidal function of the combined angular position of the rotor and the angular position of the sensor with respect to its respective first stator winding.
9. A brushless D. C. motor in accordance with claim 8 wherein said first sensor produces a voltage proportional to sin( theta + Beta ) and said second sensor produces a voltage proportional to cos( theta + Beta ), where theta is the angular position of the rotor, and Beta is the angular position of the sensor with respect to its associated respective first stator winding.
10. A brushless D. C. motor in accordance with claim 1 wherein said independent feedback path further includes speed torque curve slope control means.
11. A brushless D. C. motor in accordance with claim 1 further comprising a signal path between the sensor means and the first stator, said first stator signal path being connected in parallel with said independent feedback path, and a differential amplifier means in said first stator signal path.
12. A brushless D. C. motor in accordance with claim 11 wherein said independent feedback path further includes an impedance, said sensor means having an internal impedance associated therewith, said impedance in said feedback path being substantially greater than said sensor internal impedance whereby sensor voltage variations due to sensor internal impedance variations are minimized.
13. A brushless D. C. motor in accordance with claim 11 wherein said first stator comprises first and second windings electrically angularly displaced from each other and said magnetic flux sensor means comprises first and second sensors angularly displaced with respect to each other and to said first stator first and second windings, respectively.
14. A brushless D. C. motor in accordance with claim 13 wherein said second stator further comprises a second stator winding; each sensor has an associated independent feedback path for said sensor, said first sensor feedback path including said second stator first winding and said second sensor feedback path including said second stator second winding.
15. A brushless D. C. motor in accordance with claim 14 wherein each sensor has an associated separate signal path between the sensor and the respective first stator winding, and said differential amplifier means comprises first and second differential amplifiers, said first differential amplifier being in said first stator first winding signal path and said second differential amplifier being in said first stator second winding signal path.
16. A brushless D. C. motor in accordance with claim 1 wherein said rotor has an angular velocity associated therewith, said rotor angular velocity having a frequency corresponding thereto, said proportional signal being at said corresponding frequency; and said independent feedback path further includes means responsive to said rotor angular velocity corresponding frequency, said responsive means having a center frequency associated therewith, for producing a feedback signal proportional to a deviation of said corresponding frequency from said center frequency.
17. A brushless D. C. motor in accordance with claim 16 wherein said independent feedback path further includes means responsive to said feedback signal for functionally operating on said feedback signal to produce a speed regulation signal, said speed regulation signal being supplied to said sensor means.
18. A brushless D. C. motor in accordance with claim 17 wherein said functionally operating means includes means for functionally combining said feedback signal with a reference signal to produce said speed regulation signal.
19. A brushless D. C. motor in accordance with claim 16 wherein said feedback path includes means responsive to said proportional signal for limiting said signal to provide a constant amplitude signal thereof at said corresponding frequency, said frequency responsive means being responsive to said constant amplitude signal corresponding frequency to produce said feedback signal.
20. A brushless D. C. motor in accordance with claim 18 wherein said functional combining means includes means for summing said reference signal and said feedback signal to produce said speed regulation signal.
21. A brushless D. C. motor in accordance with claim 20 wherein said reference signal is a constant and said feedback signal is a negative feedback signal.
22. A brushless D. C. motor in accordance with claim 17 wherein said functional operating means includes means for producing said speed regulation signal as a linear function of said feedback signal.
23. A brushless D. C. motor in accordance with claim 22 wherein said linear function means is an automatic gain control amplifier means having an input and an output and a means for controlling the gain of the amplifier means, said input being said feedback signal, said output being said linear function speed regulation signal.
24. A brushless D. C. motor in accordance with claim 23 wherein said amplifier gain control means provides a reference signal to said amplifier means, said reference signal being a constant, said feedback signal being a negative feedback signal.
25. A brushless D. C. motor in accordance with claim 17 wherein said first stator comprises first and second windings electrically angularly displaced from each other and said magnetic flux sensor means comprises first and second sensors angularly displaced with respect to each other and to said first stator first and second windings, respectively.
26. A brushless D. C. motor in accordance with claim 25 wherein said independent feedback path includes said first sensor and said speed regulation signal is supplied to both said first and second sensors.
27. A brushless D. C. motor in accordance with claim 25 further comprising first and second differential amplifier means each sensor having an associated separate signal path between the sensor and the respective first stator winding, said first differential amplifier means being in said first stator first winding signal path and said second differential amplifier means being in said first stator second winding signal path.
28. A brushless D. C. motor in accordance with claim 17 further comprising a signal path between the sensor means and the first stator, and a differential amplifier means in said first stator signal path.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 与编码的末端执行器一起使用的系统和相关的使用方法 | 2020-05-12 | 573 |
| 机电锁系统 | 2020-05-13 | 192 |
| 霍尔位移传感器 | 2020-05-13 | 790 |
| 用于感测织布机的经纱的断裂或终止的装置及方法 | 2020-05-11 | 634 |
| 一种高斯计和用于测量磁场强度的微控制器及控制方法 | 2020-05-11 | 601 |
| 显示器安装组件 | 2020-05-08 | 1022 |
| 用于控制速度调节器电动车窗的马达的方法和设备 | 2020-05-12 | 657 |
| 一种电风扇的电机内置集成遥控电路 | 2020-05-08 | 497 |
| 一种基于霍尔效应的磁敏测速传感器 | 2020-05-11 | 294 |
| 一种模拟训练弹 | 2020-05-13 | 235 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
霍尔效应传感器热门专利
QQ群二维码
意见反馈
意见反馈