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Rotation sensor

A rotary detector technology, applied in the direction of converting sensor output, instruments, measuring devices, etc., can solve the problems of reducing reliability, increasing cost, difficult to determine the rotary detector, etc., and achieve the effect of eliminating pulsation components

Inactive Publication Date: 2004-12-08
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the controller and driver of the rotating electrical machine become very complicated, which reduces its reliability and increases the cost
In addition, torque ripples in the motor include those generated by the assembly accuracy of the speed reducer, the processing accuracy of the motor main case, the high-frequency magnetic field, etc., in addition to the ripple in the output of the rotary detector, This makes it difficult to determine the cause of pulsation in the output of the rotary detector and destroys the performance of the sensor

Method used

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Examples

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Embodiment 1

[0067] A first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7 .

[0068] In FIGS. 1 and 2, reference numeral 1 denotes the entire rotary detector in the first embodiment. The rotary detector 1 includes a rotary detector unit C1 and rotary calculator units C2 and C2'.

[0069] The rotary detector unit C1 of this embodiment is connected to the detected device here which includes the rotor rotating shaft 13 of the rotary motor 11, and the rotary detector unit C1 includes a resolver 15, a rotary input shaft 17, and a rotation transmission unit 19. The resolver 15 outputs a voltage proportional to the rotation angle of the rotor rotation shaft 13 . The rotary input shaft 17 is directly connected to the rotor of a resolver 15, not shown. The rotation transmission unit 19 is connected to the rotor rotation shaft 13 and transmits the rotation of the rotor rotation shaft 13 to the rotation input shaft 17 of the resolver 15 .

[0070] ...

Embodiment 2

[0084] Subsequently, a second embodiment of the present invention will be described with reference to FIGS. 8 and 9 .

[0085] In a first embodiment, the output signal of the rotary detector unit C1 is processed by a series of rotary computing units C2 and C2'. However, this does not limit the number and structure of the rotary calculation units, which can be modified according to the characteristics of the ripple component in the signal output by the rotary detector. For example, in the rotary detector unit C1 which includes the rotary encoder 87 instead of j15, there is no possibility of the second pulsation component caused by this j15. On the other hand, the adjustment phase fluctuates according to the torque direction of the rotary electric motor 11 when there is backlash in the rotary transmission unit 19 which includes a coupling. When the load of the rotary motor 11 is loaded to apply an external force to the rotor rotating shaft 13 in the direction in which the shaft...

Embodiment 3

[0088] Refer to Figure 10 and Figure 11 A third embodiment of the present invention will be described.

[0089] In the first and second embodiments, the rotary detection units (C1 and C1') are adjacent to the rotary calculation units (C2, C2', and C2") and together constitute the entire rotary detector 1, But this is not to limit the distance and the position of the rotary detection unit and the rotary calculation unit. As shown in Figures 10 and 11, the rotary calculator unit C2 can be incorporated into the speed control device 39 and the drive device 43. Because the drive device 43' needs the rotation angle information, so the output of the rotary calculator unit C2 is input to the ignition angle controller 73 through the integrator 63'. The rotary calculator unit C2' is not used here because it can be ignored by the rotary transmission unit The resulting first pulsation component. In this embodiment, the rotary detector unit C1 can be installed in the rotary motor 11, whi...

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Abstract

The rotary detector according to this invention comprises a rotary detector unit C1, C1' which detects rotary motion of a rotor; and a rotary calculator unit C2, C2' , C2" comprising a rotation angle detector, which detects the rotation angle of the rotor, and an angle speed detector 47 which detects the angle speed of the rotor, based on the output of the rotary detector unit. The rotary calculator unit comprises a trigonometrical calculator C3, C3', C3" which calculates a sine value or a cosine value of the rotation angle detected by the rotary detector; a gain adjuster 57, 57', 57" which multiplies the sine value or the cosine value, calculated by the trigonometrical calculator, by a predetermined gain; a multiplier 59, 59' which multiplies the output of the gain adjuster by the output of the angle speed detector; and a subtracter 61, 61' which subtracts the output of the multiplier from the output of the angle speed detector.

Description

technical field [0001] The present invention relates to a rotary detector capable of reducing torque ripple of a rotor by reducing a ripple component of an output signal and the like. Background technique [0002] The output torque of an electric motor usually includes ripple. Since torque ripples are caused by the irregular speed and displacement of the stand motor, they adversely affect the machining accuracy of equipment such as NC (Numerical Control) and damage it due to increased shaking of the stand. smoothness. [0003] When detecting this type of torque ripple, the torque ripple can be internal or external, the internal torque ripple occurs in the motor main housing which includes an accelerator, and the external torque ripple occurs in the rotary detection sensor . The internal torque is generated by the working accuracy of the motor stator and rotor, the eccentricity of the rotor bearing, the high-frequency magnetic field inside the motor, and the assembly accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/46B66B1/34G01D5/244G01D5/245G01P3/48G01P3/489H02K11/00H02K24/00H02K29/03H02K29/06H02K29/14H02P6/10
CPCH02K11/0031H02K11/0073G01P3/489H02K11/0026B66B1/3492G01P3/48H02K29/03H02K29/06H02K29/14H02K11/0015H02P6/10H02K11/21H02K11/22H02K11/225H02K11/33G01P3/46
Inventor 森下明平
Owner TOSHIBA ELEVATOR KK
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