A Nonlinear Modeling Method for Complex Power Electronic System of Switched Reluctance Motor
A technology of switched reluctance motor and modeling method, applied in control system, AC motor control, model/simulation for control purposes, etc., can solve problems such as time-consuming, and achieve the effect of improving accuracy and high engineering application value
Active Publication Date: 2021-09-03
CHINA UNIV OF MINING & TECH
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Problems solved by technology
Measuring the magnetization curve at each relative position requires an additional mechanical brake device, which takes a lot of time during the test, so scholars try to minimize the required magnetization by using the symmetrical structure of the 12 / 8 structure SRM and the structure 8 / 6SRM number of curves
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Embodiment Construction
[0032] Below in conjunction with accompanying drawing, the example of the present invention will be further described:
[0033] In this embodiment, a 6 / 4 bilateral switched reluctance linear motor is selected as the prototype, and the power converter adopts a three-phase asymmetrical half-bridge circuit. The specific parameters of the prototype are shown in Table 1.
[0034] Table 1 Dimensions of switched reluctance linear motor
[0035]
[0036] The finite element calculation of the motor is carried out through the finite element calculation software FLUX, and the magnetization curves of the six key relative positions of the motor are calculated respectively. The six key relative positions are related to the pole distance of the mover of the prototype, which is 60mm. Thus, starting from the alignment of phase B, the six relative positions are 0mm, 6mm, 12mm, 18mm, 24mm, and 30mm. The magnetization curves of these six relative positions were obtained by using FLUX softwar...
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The invention discloses a nonlinear modeling method of a complex power electronic system of a switched reluctance motor based on a deformed function Sigmoid interpolation method. Firstly, the flux linkage value of the switched reluctance linear motor is obtained by using the two-dimensional finite element method, the average flux density gradient coverage curve is analyzed, and a new quasi-linear model of the magnetization curve is proposed and analyzed; secondly, a switched reluctance linear motor The six key curves of the resistance motor are tested, and the whole magnetization curve is interpolated by using the deformed function Sigmoid, and several key phase current curves are sampled. At the same time, the mutual inductance is considered, and the corresponding phase winding module. This method proposes a new nonlinear modeling method, which can be used for nonlinear modeling of switched reluctance motors, and considers the influence of mutual inductance, thus greatly improving the accuracy of the model and having good engineering application value. The proposed high-precision nonlinear modeling method is also of great significance to the further research of switched reluctance motors.
Description
technical field [0001] The invention proposes a nonlinear modeling method of a switched reluctance motor, which is used for establishing a high-precision switched reluctance motor model. Background technique [0002] In recent years, the advantages of switched reluctance motors have become more and more prominent, such as firm structure, low production cost, high reliability, high efficiency, and good speed regulation performance. Switched reluctance machines are widely used as motors and generators in more and more fields. However, the highly nonlinear characteristics of SRM make its modeling difficult, mainly due to the doubly-convex structure of SRM and the fact that it always works in magnetic saturation to maintain the ideal operation of the motor. The establishment of a high-precision switched reluctance motor nonlinear model is of great significance to the design and research of switched reluctance motors, such as controlling torque ripple, non-position control, and ...
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IPC IPC(8): H02P6/34H02P25/08H02P25/098
CPCH02P25/08H02P6/34H02P25/098
Inventor 陈昊聂瑞刘劲夫赵枢棪胡玉宁姚羽霏张家祥王凯贾泽宇
Owner CHINA UNIV OF MINING & TECH