CN-121980861-A - Linear motor variable speed running performance rapid calculation method based on uniform speed running data

CN121980861ACN 121980861 ACN121980861 ACN 121980861ACN-121980861-A

Abstract

The invention discloses a method for rapidly calculating variable speed operation performance of a linear motor based on uniform speed operation data, belongs to the technical field of permanent magnet motors, and aims to solve the problems of complex motor performance analysis and low simulation calculation efficiency in the conventional variable speed operation. S1, acquiring electromagnetic performance data of a linear motor under uniform motion, wherein the uniform motion speed is that S2, establishing a mapping function between the electromagnetic performance data under uniform motion and the electromagnetic performance data under variable motion, wherein the speed of the variable motion is that S3, converting the electromagnetic performance data under uniform motion into electromagnetic performance data under variable motion by using the mapping function. The electromagnetic performance data includes no-load flux linkage, no-load back-emf, and electromagnetic power. According to the invention, through the function mapping method, the electromagnetic performance under variable speed motion can be rapidly and accurately predicted by only performing uniform motion simulation once, and the prediction result has high coincidence with finite element simulation.

Inventors

BAI JINGANG
LI WANQUAN
ZHENG PING
SUI YI
LIU BO
GUO XIBIN

Assignees

哈尔滨工业大学
哈工大郑州研究院

Dates

Publication Date: 20260505
Application Date: 20260121

Claims (9)

1. The quick calculation method for the variable speed running performance of the linear motor based on the uniform speed running data is characterized by comprising the following steps of: S1, acquiring electromagnetic performance data of a linear motor under uniform motion, wherein the speed of the uniform motion is that ; S2, establishing a mapping function between the electromagnetic performance data under uniform motion and the electromagnetic performance data under variable motion, wherein the speed of the variable motion is that ; S3, converting the electromagnetic performance data under uniform motion into electromagnetic performance data under variable motion by using the mapping function.
2. The method for quickly calculating the variable speed operation performance of the linear motor based on uniform speed operation data according to claim 1, wherein the electromagnetic performance data comprise no-load flux linkage, no-load counter potential, load counter potential and electromagnetic power.
3. The method for rapidly calculating the variable speed operation performance of a linear motor based on uniform speed operation data according to claim 2, wherein in step S2, an idle flux linkage under uniform speed motion is established No-load flux linkage with variable speed motion The mapping function between the two is: In the formula, For the displacement of the mover under uniform motion, For displacement in a variable-speed motion, For the pole pitch of the motor, Is the instantaneous value of the constant velocity flux linkage, Is the instantaneous value of the variable speed linkage.
4. The method for rapidly calculating the variable speed operation performance of a linear motor based on uniform speed operation data according to claim 2, wherein in step S2, no-load counter potential under uniform speed motion is established No-load counter potential under variable speed motion The mapping function between the two is: 。
5. the method for rapidly calculating the variable speed operation performance of the linear motor based on the uniform speed operation data according to claim 2, wherein in step S2, a load counter potential under uniform speed motion is established Counter potential to load under variable speed motion The mapping function between the two is: 。
6. The method for rapidly calculating the variable speed operation performance of the linear motor based on uniform speed operation data according to claim 2, wherein in step S2, electromagnetic power under uniform speed motion is established Electromagnetic power under variable speed motion The mapping function between the two is: 。
7. The method for rapidly calculating the variable speed operation performance of the linear motor based on uniform speed operation data according to claim 2, wherein no-load flux linkage in uniform speed motion Calculated as follows: In the formula, The amplitude of the no-load flux linkage is the constant speed operation.
8. The method for rapidly calculating the variable speed operation performance of a linear motor based on uniform speed operation data according to claim 7, wherein no-load flux linkage under variable speed motion Calculated as follows: In the formula, The amplitude of the no-load flux linkage is the constant speed operation.
9. The method for rapidly calculating the variable speed operation performance of the linear motor based on uniform speed operation data according to claim 8, wherein the magnitude of the no-load flux linkage under uniform speed operation is Amplitude of no-load flux linkage under uniform speed operation Equal.

Description

Linear motor variable speed running performance rapid calculation method based on uniform speed running data Technical Field The invention relates to the technical field of permanent magnet motors, in particular to a method for rapidly calculating variable speed running performance of a linear motor based on uniform speed running data. Background The permanent magnet linear motor is widely applied to the fields of free piston engines, semiconductor equipment, precision machine tools and the like due to the characteristics of high efficiency, high dynamic response, high precision and the like. In practical application, the motor rotor often needs to run according to a preset speed change track so as to meet different engineering requirements. However, during variable speed operation, the electromagnetic performance of the motor varies with time, complicating performance analysis. The traditional method generally needs to solve a complete mechanical period to obtain a performance curve, and has low simulation calculation efficiency and long time consumption for a linear motor with a complex electromagnetic structure. In the prior art, the variable speed motion is often equivalent to the uniform speed motion for analysis, so as to simplify calculation. However, the performance of the linear motor such as counter electromotive force, electromagnetic power and the like is closely related to the speed, and the influence of the instantaneous change of the speed on the electromagnetic transient process can be ignored by simple equivalence, so that the analysis result is inaccurate, and particularly under the working conditions of high speed and high acceleration, obvious deviation can occur in the prediction of instantaneous current, peak thrust, temperature rise and efficiency, and the reliability of the system design is influenced. Therefore, an analysis method capable of ensuring the calculation efficiency and accurately reflecting the influence of the variable speed motion on the electromagnetic performance is needed. Disclosure of Invention The invention provides a method for rapidly calculating the variable speed operation performance of a linear motor based on uniform speed operation data, which aims to solve the problems of complex motor performance analysis and low simulation calculation efficiency in the conventional variable speed operation. The invention discloses a method for rapidly calculating the variable speed running performance of a linear motor based on uniform speed running data, which comprises the following steps: S1, acquiring electromagnetic performance data of a linear motor under uniform motion, wherein the speed of the uniform motion is that ; S2, establishing a mapping function between the electromagnetic performance data under uniform motion and the electromagnetic performance data under variable motion, wherein the speed of the variable motion is that; S3, converting the electromagnetic performance data under uniform motion into electromagnetic performance data under variable motion by using the mapping function. Preferably, the electromagnetic performance data includes an idling flux linkage, an idling back emf, a loading back emf, and electromagnetic power. Preferably, in step S2, an empty flux linkage is established in constant motionNo-load flux linkage with variable speed motionThe mapping function between the two is: In the formula, For the displacement of the mover under uniform motion,For displacement in a variable-speed motion,For the pole pitch of the motor,Is the instantaneous value of the constant velocity flux linkage,Is the instantaneous value of the variable speed linkage. Preferably, in step S2, an idling counter potential is established in constant motionNo-load counter potential under variable speed motionThe mapping function between the two is: 。 Preferably, in step S2, a load back-emf is established in uniform motion Counter potential to load under variable speed motionThe mapping function between the two is: 。 preferably, in step S2, the electromagnetic power in uniform motion is established Electromagnetic power under variable speed motionThe mapping function between the two is: 。 Preferably, the no-load flux linkage is under uniform motion Calculated as follows: In the formula, The amplitude of the no-load flux linkage is the constant speed operation. Preferably, the no-load flux linkage is under variable speed motionCalculated as follows: In the formula, The amplitude of the no-load flux linkage is the constant speed operation. Preferably, the magnitude of the no-load flux linkage is at constant speedAmplitude of no-load flux linkage under uniform speed operationEqual. The invention has the beneficial effects that: 1. the function mapping method provided by the invention is based on the electromagnetic performance data under uniform motion and the speed data of uniform motion and variable motion, so that the mapped electromagnetic performance data under variabl