Unlock instant, AI-driven research and patent intelligence for your innovation.

A Compensation Method for Inverter Nonlinear Effect of Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor, non-linear effect technology, applied in the control of generators, motor control, motor generator control and other directions, can solve the problem of strong system parameters, achieve low computational burden, simple implementation, and eliminate harmonic errors. Effect

Active Publication Date: 2021-10-08
黑龙江省汉泽石油设备有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To eliminate 6th harmonic error in estimating rotor position, Y.Park and S.K.Sul, "A novelmethod utilizing trapezoidal voltage to compensate for inverternonlinearities," IEEE Trans.Power Electron.,vol.27,no.12,pp.4837 –4846, Dec.2012. The dead zone compensation method proposed effectively suppresses the 6th harmonic component in the estimated position, but this method has a strong dependence on the system parameters. The present invention proposes a Compensation method for nonlinear effect of inverter under position sensorless control of permanent magnet synchronous motor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Compensation Method for Inverter Nonlinear Effect of Permanent Magnet Synchronous Motor
  • A Compensation Method for Inverter Nonlinear Effect of Permanent Magnet Synchronous Motor
  • A Compensation Method for Inverter Nonlinear Effect of Permanent Magnet Synchronous Motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0035] Such as figure 1 As shown, the present invention provides a method for compensating the nonlinear effect of an inverter under the control of a permanent magnet synchronous motor without a position sensor, which specifically includes the following steps:

[0036] Step 1) According to the sampling period T corresponding to the discrete control system s and the frequency of the 6th harmonic error to be eliminated Calculate the coefficients in the all-pass filter

[0037] Step 2) Reasonably select the filtering bandwidth ω according to the requirements of filtering performance BW , and then according to ω BW and T s Calculate the coefficients in the all-pass filter

[0038] Step 3) as attached figure 2 As shown, the position estimation error information f(Δθ) is connected to the input port x of the all-pass filter, where the initial...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for compensating the nonlinear effect of an inverter under the control of a permanent magnet synchronous motor without a position sensor. The method uses a pulse vibration high-frequency voltage injection method to estimate the rotor position of a permanent magnet synchronous motor. The pass filter is applied to the rotor position observer, which can effectively eliminate the 6th harmonic component caused by the nonlinear effect of the inverter in the rotor position estimation error, and improve the rotor position estimation accuracy.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method for compensating the non-linear effect of an inverter of a permanent magnet synchronous motor. Background technique [0002] At present, the rotor position detection of the permanent magnet synchronous motor is often realized by the pulse vibration high frequency voltage injection method. However, due to the setting of the dead time of the inverter, the non-linear effect of the inverter will cause the sixth harmonic error in the estimated rotor position obtained by this method. This harmonic error degrades position estimation accuracy and also causes torque ripple, so it is necessary to eliminate it. [0003] To eliminate 6th harmonic error in estimating rotor position, Y.Park and S.K.Sul, “A novelmethod utilizing trapezoidal voltage to compensate for inverternonlinearities,” IEEE Trans.Power Electron.,vol.27,no.12,pp.4837 –4846, Dec.2012. The dead zone compensation method...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/18H02P21/24H02P27/12
CPCH02P27/12H02P2203/03H02P2207/05H02P21/18H02P21/24
Inventor 罗晨刘兵陈舒静
Owner 黑龙江省汉泽石油设备有限公司