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Resolver soft decoding system and method

A soft decoding and resolver technology, applied in the computer field, can solve the problems of motor rotor position error and high cost, and achieve the effect of improving accuracy, improving accuracy, and reducing determination cost

Pending Publication Date: 2022-08-09
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the hard decoding of the rotary converter through a professional chip is expensive, and at the same time, due to problems such as the accuracy of the decoding chip, the position of the motor rotor decoded will be There are some errors

Method used

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  • Resolver soft decoding system and method
  • Resolver soft decoding system and method

Examples

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Embodiment 1

[0026] figure 1 This is a schematic structural diagram of a resolver soft decoding system provided in Embodiment 1 of the present invention; the resolver soft decoding system provided in this embodiment is applicable to the situation where the rotor position information of the motor is determined by a resolver. see figure 1 As shown, the resolver soft decoding system may include: a resolver excitation processing circuit 120, a resolver 130, a resolver input processing circuit 140, a clock module 110 and an analog-to-digital converter DSADC (Delta Sigma Analog-to-Digital Converter) in the motor main control chip -Digital Converter, delta-sigma analog-to-digital converter) module 150.

[0027] The clock module 110 is used for: performing pulse width modulation based on the first preset frequency to determine the differential square wave signal of the first preset frequency; the resolver excitation processing circuit 120 is used for: processing the differential square wave signa...

Embodiment 2

[0045] figure 2 This is a schematic flowchart of a resolver soft decoding method provided in the second embodiment of the present invention; the environment detection system provided in this embodiment can be applied to the situation of determining the position information of the motor rotor. The method may be performed by a resolver soft decoding system, which may be implemented in hardware and / or software, and which may be configured in a vehicle. The explanations of terms that are the same as or corresponding to the above embodiments are not repeated here.

[0046] like figure 2 As shown, the method includes:

[0047] S210. Determine a differential square wave signal of the first preset frequency by performing pulse width modulation based on the first preset frequency through the clock module in the main control chip of the motor.

[0048] The first preset frequency may be a signal frequency that can be directly adjusted by the clock module. The differential square wa...

Embodiment 3

[0071] image 3 This is a schematic flow chart of a resolver soft decoding method provided in Embodiment 3 of the present invention. In this embodiment, on the basis of the above-mentioned embodiment, the configuration of the clock module is added. The explanations of terms that are the same as or corresponding to the above embodiments are not repeated here.

[0072] like image 3 As shown, the method includes:

[0073] S310 , obtaining the control frequency of the motor controlled by the main control chip of the motor.

[0074] Specifically, the control frequency at which the main control chip in the motor controls the motor is obtained.

[0075] S320. Determine the second preset frequency based on the control frequency and the adapting frequency of the resolver, and determine the first preset frequency corresponding to the second preset frequency based on the frequency conversion relationship in the resolver excitation processing circuit.

[0076] Wherein, the frequency...

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Abstract

The embodiment of the invention discloses a resolver soft decoding system and method. The system comprises a rotary transformer excitation processing circuit, a rotary transformer, a rotary transformer input processing circuit, and a clock module and an analog-to-digital converter DSAC module in a motor main control chip. Wherein the clock module is used for performing pulse width modulation based on a first preset frequency, and determining a differential square wave signal of the first preset frequency; the rotary transformer excitation processing circuit is used for determining a first differential excitation signal of a second preset frequency; the rotary transformer is used for outputting a first differential sinusoidal signal and a first differential cosine signal; the rotary transformer input conditioning circuit is used for determining a second differential excitation signal, a second differential sinusoidal signal and a second differential cosine signal; and the DSADC module is used for determining the position information of the motor rotor. Through the technical scheme of the embodiment of the invention, the determination cost of the position of the motor rotor can be reduced, and the accuracy of rotary transformer decoding is improved.

Description

technical field [0001] Embodiments of the present invention relate to computer technology, and in particular, to a resolver soft decoding system and method. Background technique [0002] With the increasing development of new energy vehicles, the power of new energy vehicles is mainly provided by electric motors, and the position information of motor rotors is an important part of closed-loop torque control of vehicle drive motors. [0003] At present, the electric drive system of new energy vehicles usually uses a resolver to obtain and collect the position of the synchronous motor, and then uses a professional chip to perform hard decoding of the resolver to obtain the rotor position of the motor. [0004] However, in the process of implementing the present invention, the inventor found that there are at least the following problems in the prior art: using a professional chip to perform rotary hard decoding, the cost is high, and at the same time, due to problems such as t...

Claims

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Application Information

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IPC IPC(8): H02P6/16H02K11/225
CPCH02P6/16H02K11/225H02P2203/03Y02T10/72
Inventor 师浩浩李帅李芝炳侯克晗郑强
Owner CHINA FIRST AUTOMOBILE
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