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Resolver soft decoding system

A technology of resolver and conversion module, applied in the field of sensors, can solve the problem of high cost and achieve the effect of cost saving, cost reduction and high precision

Active Publication Date: 2017-11-03
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of the resolver, a decoding chip is often required to convert the output signal of the resolver into the angle and frequency of the resolver, and then convert it into the electrical angle and frequency of the motor by software ,higher cost

Method used

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Embodiment Construction

[0044] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] The resolver (Resolver) outputs the sin and cos differential signals with the excitation signal as the carrier. There is a slight unfixed phase difference between the actual output sin and cos signals and the excitation signal, such as figure 1 shown.

[0046] Input excitation signal: V r =V p sin(ωt),

[0047] Output differential signal: S3-S1=V S sin(ωt)sin(θ), S2-S4=V S sin(ωt)cos(θ),

[0048] When sin(ωt)=1, S3-S1, S2-S4 are sampled, then:

[0049]

[0050] However, the actual output signal is...

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Abstract

The invention discloses a rotary transformer soft decoding system, which includes an angle interval determination module, an angle calculation module, an angle compensation module, a frequency calculation module, an electrical angle and an electrical frequency conversion module; the angle interval determination module is based on the sampling of sin and cos differential signals Value, to determine the angle interval of the angle at the DMA interruption moment; the angle calculation module calculates the angle at the DMA interruption moment according to the angle interval at the DMA interruption moment angle; the angle compensation module is used to compensate the angle at the DMA moment to obtain the soft decoding interruption moment angle; frequency The calculation module is used to calculate the frequency of the resolver; the electrical angle and electrical frequency conversion module converts the angle at the current soft decoding interruption time into the electrical angle of the motor, and converts the current frequency of the resolver into the electrical frequency of the motor. The soft decoding system of the rotary transformer of the present invention does not need a decoding chip, and can reduce the cost of the motor controller.

Description

technical field [0001] The invention relates to a sensor for the position and rotational speed of a motor rotor, and in particular relates to a rotary transformer soft decoding system. Background technique [0002] Resolver (Resolver), as a common motor rotor position and speed sensor, has also been widely used in electric (pure electric, hybrid) vehicles. In the application of the resolver, a decoding chip is often required to convert the output signal of the resolver into the angle and frequency of the resolver, and then convert it into the electrical angle and frequency of the motor by software ,higher cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a rotary transformer soft decoding system, which does not require a decoding chip, can reduce the cost of the motor controller, reduce the complexity of the circuit, and has higher precision. [0004] In order to solve the above technical problems, the reso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/17H01F38/18
Inventor 陈涵郑海涛
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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