PMSM stator flux linkage weak magnetic given method
A technology of permanent magnet synchronous motor and stator flux linkage, which is applied to the control of generators, motor generators, and electronically commutated motors. Simple and effective, the control process is easy to achieve the effect
Inactive Publication Date: 2016-02-03
JIANGSU UNIV OF SCI & TECH
View PDF2 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Feedback closed-loop adjustment methods include look-up table method, gradient descent method, maximum torque control method, etc. The disadvantage is that the algorithm is very complicated and difficult to apply in practice
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
[0021] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] to combine figure 1 , the stator flux linkage is analyzed. The stator flux linkage is composed of two parts: the flux linkage generated by the self-inductance of the stator winding and the mutual inductance flux linkage generated by the rotor permanent magnet excitation on the stator winding. In the d-q coordinate system, the stator flux linkage ψ s Component of ψ d , ψ q The calculation formulas are: ψ d =L d i d +ψ f , ψ q =L q i q , where i d i q Respectively d-axis, q-axis current, L d , L q are the d-axis and q-axis inductance of the permanent magnet synchronous motor, ψ f is the mutual inductance flux linkage. Among them, when the d-axis current is negative, the amplitude of the stator flux linkage can be effectively weakened; the rotor permanent magnet flux linkage is determined by the parameters of the permanent...
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 discloses a PMSM (permanent magnet synchronous motor) stator flux linkage weak magnetic given method. The method comprises steps that, a rated rotating speed of a PMSM is contrasted with an actual rotating speed, if the actual rotating speed is higher than the rated rotating speed, according to parameters provided by a production manufacturer, or a mutual inductance flux linkage is calculated, difference of the given rotating speed and the actual rotating speed is inputted to a PI adjuster, output is taken as a d-axis current id for excitation control, the difference of the given rotating speed omegaref and the actual rotating speed omega is processed through a PI_2 adjuster, a given torque Te<*> is outputted, difference between the given torque Te<*> and an actual torque Te<*> is processed through a PI_3 adjuster, and the output is taken as a current q-axis component iq for torque control. Self-inductance flux linkages of a d axis and a q axis in a d-q coordinate system are calculated, and a given stator flux linkage amplitude can be calculated according to the mutual inductance flux and the self-inductance flux linkage. The method is simple and effective, the internal structure of the motor and control system hardware are unnecessary to change in a realization process, the control process is easier to realize, a motor speed regulation scope is effectively expanded, and motor production cost and control cost are reduced.
Description
technical field [0001] The invention belongs to the field of motor control, in particular to a given method for stator flux linkage weakening of a permanent magnet synchronous motor. Background technique [0002] Due to its high efficiency, high power density and high torque-to-inertia ratio, permanent magnet synchronous motors have been widely used in speed-adjustable drive systems with high requirements such as rail, transportation, electric traction, and electric vehicles. [0003] In order to realize the field-weakening operation of permanent magnet synchronous motors, traditional methods can be roughly divided into two directions, namely, feed-forward open-loop regulation and feedback-type closed-loop regulation. The former is based on the mathematical model of the motor body itself. When running in the constant power area, the analysis and judgment of the field weakening interval and the adjustment of the given value of the field weakening current rely on the mathemati...
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 Applications(China)
IPC IPC(8): H02P21/14
Inventor 魏海峰韦汉培张懿朱学青
Owner JIANGSU UNIV OF SCI & TECH