A Signal Processing Method of Reluctance Resolver
A resolver and signal processing technology, applied in the field of signal processing, can solve problems such as stator and rotor eccentricity, electromagnetic interference, output signal deviation, etc., and achieve the effect of improving angular accuracy and speed accuracy, and improving accuracy
Active Publication Date: 2017-10-17
中工科安科技有限公司 +2
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Problems solved by technology
However, the output signal deviation will also be caused by the following factors: eccentricity of the stator and rotor due to installation deviation; uneven shape or material of the rotor core; hysteresis or saturation; influence of mechanical radial force; electromagnetic interference; limited number of windings; cogging effect ;temperature change
Therefore, the accuracy is lower than the other two resolvers
Method used
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[0032] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0033] The signal processing method of the reluctance rotary transformer of the present invention is used to process two pairs of output signals of two output windings of the reluctance rotary transformer, so as to improve the accuracy of angle th and angular velocity ω of the reluctance rotary transformer. see figure 1 , the signal processing method includes the following steps.
[0034] Step S1 , perform low-pass filtering on the two pairs of output signals before analog-to-digital conversion.
[0035] Step S2, analog-to-digital conversion of the two pairs of output signals into two pairs of...
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The invention discloses a reluctance-type rotary transformer signal processing method, which is used for processing two output signals of two output windings of a reluctance-type rotary transformer. The signal processing method comprises the following steps: to begin with, ensuring that the two output signals synchronize in specified shaking; then, carrying out correction on extracted two low-frequency signals, correcting phase deviation of two correction signals through cos(theta) trigonometric function operation and finally obtaining an electrical angle instantaneous value in electrical angle period; obtaining a specific angle from the electrical angle instantaneous value according to a mechanical angle zero position reference point signal, and converting the specific angle into a corresponding rotor position mechanical angle; carrying out negative feedback on the mechanical angle and system angle error compensation amount to generate an angle th; and obtaining angular velocity omega by carrying out velocity calculation on the angle th. The method can improve the precision of the angle th and the precision of the angular velocity omega of the reluctance-type rotary transformer.
Description
technical field [0001] The invention relates to a signal processing method, in particular to a signal processing method of a reluctance rotary transformer. Background technique [0002] The resolver is a stable and efficient sensor, which is often built into the tail of the servo motor as a position and speed sensor; position sensing of the driving motor and generator in electric vehicles, position and speed sensing of the electric power steering wheel motor, gas Valve angle measurement, vacuum chamber conveyor angular position measurement, etc., all use resolvers. [0003] The excitation winding and output winding of the reluctance resolver are placed in the same set of stator slots and are fixed. But the form of excitation winding and output winding is different. The output signals of the two-phase windings change sinusoidally with the rotation angle and are 90° electrical angle different from each other. Compared with brushed resolvers and toroidal resolvers, reluctanc...
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IPC IPC(8): G01D5/12G01D18/00
CPCG01D5/12G01D18/00
Inventor 文长明文可
Owner 中工科安科技有限公司