A dual sliding mode observer spmsm sensorless composite control method
A technology of sliding mode observer and compound control, which is applied in the control system, generator control, motor control, etc., can solve the problems of poor tracking performance, poor load capacity, and difficult parameter adjustment, so as to improve the load capacity and reduce the Small torque ripple and improved system stability
Active Publication Date: 2022-05-27
佛山市顺德区乐普达电机有限公司
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The present invention solves the problems of poor tracking performance of the rotational speed loop and current loop PI controller in the process of double closed-loop vector control of permanent magnet synchronous motors, difficulty in parameter adjustment, chattering and poor load capacity of traditional sliding mode observers
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0066] Sampling three-phase current i abc , voltage u abc , the current i in the stationary coordinate system is obtained by Clark transformation αβ , the voltage u αβ , the estimated current value is obtained by integrating the reconstructed current state equation Then with the actual sampling current i αβ Subtract to get the current error value As the input of the exponential piecewise sliding mode function proposed in the present invention, the estimated back electromotive force is obtained by filtering out the high-order harmonics through the sliding mode gain K and filtering out the high-order harmonics by the low-pass filter. at this time and Input into the divider for division to get the estimated electrical angle The tangent value of , and then obtain the estimated electrical angle value through the arctangent function Will and First find the sum of the squares and then the square root to get divided by the permanent magnet flux linkage ψ by the ...
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
Login to View More Abstract
The invention provides a sensorless composite control method of a permanent magnet synchronous motor with double sliding mode observers. The invention designs two sliding mode observers, one of which provides an exponential segmented sliding mode function to measure the back electromotive force. observation. Secondly, a sliding mode observer is designed to observe the load torque to fine-tune the parameters of the segmented PI controller, and at the same time, the estimated load torque is introduced into the q-axis for feedforward compensation. A second-order sliding mode controller is designed in the inner loop of the q-axis current, which improves the tracking performance of the q-axis current and indirectly controls the electromagnetic torque. The exponential segmented sliding mode function provided by the invention is more conducive to the observation of the back electromotive force and weakens the chattering phenomenon of the system; the load sliding mode observer observes the load torque to fine-tune the parameters of the segmented PI controller and performs feedforward compensation at the same time. , improve the load capacity of the system; the second-order sliding mode controller reduces the torque ripple. The invention has excellent dynamic and steady state performance and wide application value in the sensorless control of the permanent magnet synchronous motor in the medium and high speed domain.
Description
technical field [0001] The invention belongs to the field of permanent magnet synchronous motor control, and relates to a sensorless composite control method of double sliding mode observers, in particular to a simple, easy-to-implement and excellent effect double sliding mode observer composite control method in a permanent magnet synchronous motor A system model for sensorless control in the mid-to-high-speed domain. Background technique [0002] Permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) is mainly divided into surface mount permanent magnet synchronous motor (SPMSM) and built-in permanent magnet synchronous motor (IPMSM). It has the characteristics of simple structure, small size, high power density, high efficiency, easy maintenance, and its excellent speed regulation performance makes it widely used in many fields, such as industrial manufacturing, intelligent robots, new energy vehicles, etc. As the permanent magnet synchronous motor...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/22H02P21/05H02P25/022
CPCH02P21/0003H02P21/0007H02P21/13H02P21/05H02P21/22H02P25/022H02P2207/05H02P21/20H02P21/24
Inventor 彭思齐蒋雨函
Owner 佛山市顺德区乐普达电机有限公司