CN-121984395-A - CSOGI-based IPSM (intelligent platform management system) position-free sensor control method and related equipment

CN121984395ACN 121984395 ACN121984395 ACN 121984395ACN-121984395-A

Abstract

The invention discloses an IPSM (intelligent power management system) position-free sensor control method based on CSOGI and related equipment, relating to the field of AC (alternating current) motor control, comprising the following steps: the stator counter electromotive force is constructed based on the acquired stator voltage and current, the counter electromotive force is integrated by CSOGI to obtain a stator flux linkage component, meanwhile, the stator current is subjected to self-adaptive filtering by utilizing a second-order generalized integrator SOGI to obtain a fundamental current component, and then an effective flux linkage is calculated by combining a quadrature inductance and is input into a phase-locked loop PLL to extract the electric angular velocity and the rotor position, so that the vector control closed loop without a position sensor is realized. The center frequency of CSOGI and SOGI is consistent with the synchronous electric angular speed of the motor, and the suppression of direct current offset and higher harmonic waves is realized through parameter design, so that the stability and the precision of flux linkage observation and position estimation are improved. The invention is suitable for IPSM position-free sensor control under the condition of measurement bias and harmonic interference.

Inventors

LIU QIANG
TANG JIZE
HUANG LEI
CHEN YUQING
ZHANG AI
CAO GUIYIN
WANG JINWEI
GE XINGLAI

Assignees

东方日立(成都)电控设备有限公司

Dates

Publication Date: 20260505
Application Date: 20260206

Claims (10)

1. An IPMSM sensorless control method based on CSOGI, comprising: Based on the acquired stator voltage in a stationary coordinate system A shaft(s), Component on axis 、 Stator current is at the A shaft(s), Component on axis 、 And constructs the counter electromotive force of the stator in combination with the resistance Rs of the stator A shaft(s), Component on axis 、 ; For the said 、 Performing integration processing based on CSOGI to obtain stator flux linkage A shaft(s), On-axis observed component 、 ; For the said 、 Respectively performing SOGI-based adaptive filtering processing to obtain filtered current components; Based on the following 、 And calculating the effective flux linkage of the motor by the filtered current component and the quadrature axis inductance Lq A shaft(s), Component on axis 、 ; The said 、 And as the input of a phase-locked loop (PLL), extracting an electric angular velocity estimated value and a rotor position estimated value of the motor, and feeding back the electric angular velocity estimated value and the rotor position estimated value to a vector control system to realize the closed-loop vector control of the IPSM position-free sensor.
2. The CSOGI-based IPMSM sensorless control method of claim 1, wherein the CSOGI center angular frequency Is set to synchronous electric angular velocity of the motor, and Taking an electric angular velocity estimation value from a preset synchronous electric angular velocity, a synchronous electric angular velocity obtained by conversion given by a rotational speed, or an electric angular velocity outputted by a phase-locked loop PLL, and for Performing clipping to cause Is within a preset frequency interval.
3. The method for controlling an IPSM sensorless control of CSOGI of claim 2, wherein said CSOGI has a transfer characteristic such that the frequency is equal to The input components of the input signals realize integral relation and the corresponding output of the DC offset component in the input signals is zero in steady state so as to eliminate the observation output of the DC offset to the stator flux linkage 、 Is a function of (a) and (b).
4. The CSOGI-based IPMSM sensorless control method of claim 2, wherein the following steps 、 By counter-electromotive force of stators 、 Performing CSOGI integration to obtain the center frequency of CSOGI And setting the DC offset component and the higher harmonic component as estimated values of synchronous electric angular velocity of the motor, and realizing the suppression of the DC offset component and the higher harmonic component based on gain parameters k1 and k2 of CSOGI.
5. The CSOGI-based IPMSM sensorless control method of claim 1, wherein the SOGI filter has an output-to-input amplitude ratio of 1 and a phase difference of 0 for the fundamental component of the current having a frequency equal to its center angular frequency.
6. The CSOGI-based IPMSM sensorless control method of claim 1, wherein the SOGI filter has a steady state output of zero for the dc component of the input signal and the ratio of the magnitude of the SOGI filter output to the input satisfies a decreasing relationship with increasing n for the n-th harmonic component of the input signal, where n is a positive integer greater than 1.
7. The CSOGI-based IPMSM sensorless control method of claim 1, wherein the gain parameters of CSOGI and SOGI are designed, the gain parameters are selected by analyzing the amplitude-frequency characteristics and closed loop pole distribution under different gain parameters, and the gain parameters satisfy a preset stability constraint and a preset dynamic response constraint to trade-off between dynamic response and dc bias and higher harmonic suppression capability.
8. An IPMSM sensorless control system based on CSOGI, for implementing the IPMSM sensorless control method based on CSOGI according to any one of claims 1 to 7, comprising: the data acquisition module is used for acquiring stator voltage in a static coordinate system A shaft(s), Component on axis 、 Stator current is at the A shaft(s), Component on axis 、 ; A back electromotive force constructing module for constructing a back electromotive force based on the 、、、 And combined with stator resistance Rs constructing the counter electromotive force of the stator A shaft(s), Component on axis 、 ; A flux linkage observation module for the said 、 Performing integration processing based on CSOGI to obtain stator flux linkage A shaft(s), On-axis observed component 、 ; A current filtering module for the said 、 Respectively performing SOGI-based adaptive filtering processing to obtain filtered current components; an effective flux linkage calculation module for based on the 、 And calculating the effective flux linkage of the motor by the filtered current component and the quadrature axis inductance Lq A shaft(s), Component on axis 、 ; A phase-locked loop (PLL) module for converting the signals into the signals 、 As input, extracting an electric angular velocity estimation value and a rotor position estimation value of the motor; and the vector control module is used for feeding back the electric angular velocity estimated value and the rotor position estimated value to a vector control system so as to realize the closed-loop vector control of the IPSM without the position sensor.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the CSOGI-based IPMSM sensorless control method of any one of claims 1-7 when the program is executed by the processor.
10. A computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements the CSOGI-based IPMSM sensorless control method of any one of claims 1 to 7.

Description

CSOGI-based IPSM (intelligent platform management system) position-free sensor control method and related equipment Technical Field The invention relates to the field of alternating current motor control, in particular to an IPSM (intelligent power management system) sensorless control method based on CSOGI and related equipment. Background The built-In Permanent Magnet Synchronous Motor (IPMSM) has the advantages of energy saving, high efficiency, simple structure and the like, and is widely applied to the fields of industrial driving, new energy automobiles and the like, and the high-performance vector control technology of the IPMSM is widely focused on in the background. The conventional vector control system needs to acquire the rotation speed and the rotor position of the motor by using mechanical sensors, so that the cost is increased, and the reliability of the system is reduced, and therefore, the position-sensorless vector control technology of the IPMSM is generated. The IPSM (intelligent platform management system) position-free sensor control technology based on the voltage model flux linkage observer has the advantages of simple structure, easiness in implementation and the like, and the use of pure integration can seriously influence the flux linkage observation precision. Aiming at the problems of the voltage model, a low-pass filter can be used for replacing an integrator, so that the problem of integral saturation can be effectively limited, but obvious phase delay and amplitude attenuation can be brought to the flux linkage. Meanwhile, the SOGI of the second-order generalized integrator is used for replacing an integrator in a voltage model due to functions of integration, self-adaptive filtering and the like, and the defects of a low-pass filter are perfectly overcome, but the influence of direct current bias cannot be completely eliminated due to the fact that the second-order generalized integrator has no problems of amplitude attenuation, phase delay and the like at the center frequency. For IPMSM, the rotation speed and position of the IPMSM are generally identified through an effective flux linkage, and when there is a deviation in the sampling current, the IPMSM is directly superimposed on the effective flux linkage, so that a deviation occurs in the flux linkage observation result. Disclosure of Invention The invention aims to provide a CSOGI-based IPSM (intelligent platform management system) non-position sensor control method and related equipment, and solves the problem of how to realize high-precision non-position sensor control of an IPSM. The invention is realized by the following technical scheme: an IPMSM sensorless control method based on CSOGI, comprising: Based on the acquired stator voltage in a stationary coordinate system A shaft(s),Component on axis、Stator current is at theA shaft(s),Component on axis、And constructs the counter electromotive force of the stator in combination with the resistance Rs of the statorA shaft(s),Component on axis、; For the said、Performing integration processing based on CSOGI to obtain stator flux linkageA shaft(s),On-axis observed component、; For the said、Respectively performing SOGI-based adaptive filtering processing to obtain filtered current components; Based on the following 、And calculating the effective flux linkage of the motor by the filtered current component and the quadrature axis inductance LqA shaft(s),Component on axis、; The said、And as the input of a phase-locked loop (PLL), extracting an electric angular velocity estimated value and a rotor position estimated value of the motor, and feeding back the electric angular velocity estimated value and the rotor position estimated value to a vector control system to realize the closed-loop vector control of the IPSM position-free sensor. Further, the center angular frequency of CSOGIIs set to synchronous electric angular velocity of the motor, andTaking an electric angular velocity estimation value from a preset synchronous electric angular velocity, a synchronous electric angular velocity obtained by conversion given by a rotational speed, or an electric angular velocity outputted by a phase-locked loop PLL, and forPerforming clipping to causeIs within a preset frequency interval. Further, the CSOGI transfer characteristics satisfy that for a frequency equal toThe input components of the input signals realize integral relation and the corresponding output of the DC offset component in the input signals is zero in steady state so as to eliminate the observation output of the DC offset to the stator flux linkage、Is a function of (a) and (b). Further, the said、By counter-electromotive force of stators、Performing CSOGI integration to obtain the center frequency of CSOGIAnd setting the DC offset component and the higher harmonic component as estimated values of synchronous electric angular velocity of the motor, and realizing the suppression of the DC offset component and the higher