Permanent magnet synchronous motor modeling method based on predictable iron loss
A technology of permanent magnet synchronous motor and modeling method, applied in design optimization/simulation, special data processing application, etc., can solve the problems of output power error, ineffective calculation, large core loss, etc., and achieve the effect of accurate calculation
Active Publication Date: 2020-10-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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However, the existing above-mentioned setting of the model also has some obvious defects, such as: 1. The equivalent iron loss resistance of the fixed resistance is mostly determined by the measured data when the motor is running at the rated speed, but the iron core loss of the motor It is a quantity closely related to the motor speed and operating conditions of the motor (the magnetic flux density distribution of the motor stator). Using the equivalent iron loss resistance with a fixed resistance value will inevitably cause a large calculation error, and it cannot effectively calculate the motor in full operation. core loss in the field, and then cause errors in calculating the output power, core loss, efficiency, temperature rise, etc. of the motor using the equivalent circuit model of the permanent magnet synchronous motor; Therefore, the use of inductance with fixed parameters will cause errors in calculating the output torque and output power of the motor using the equivalent circuit model; 3. When the motor is running without load, the leakage flux linkage content is small, causing The core loss is small. When the motor is running under load, the leakage flux linkage content increases significantly, and the resulting core loss is relatively large. Therefore, the above-mentioned processing method of ignoring the core loss caused by the leakage flux linkage will result in low model accuracy.
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[0036] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0037] The permanent magnet synchronous motor modeling method based on predictable iron loss provided by the present invention specifically includes the following steps:
[0038] Step 1, such as figure 1 As shown, the single-phase equivalent circuit model of the permanent magnet synchronous motor is established in the three-phase AC abc coordinate system. Taking phase a as an example, it can be expressed in the following form:
[0039] V a =E a +jωL s I am +Z al I a +R a I a
[0040]
[0041] I a...
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The invention provides a permanent magnet synchronous motor modeling method based on predictable iron loss, which jumps out of a conventional method of an existing model, and realizes accurate calculation of output characteristics of a permanent magnet synchronous motor under different operation conditions by adopting variable inductance and adopting different values of synchronous inductance andleakage inductance under different operation conditions of the motor. Variable equivalent magnetizing iron power consumption resistance is adopted to calculate iron core loss caused by magnetizing flux linkage, the resistance should be connected to the two ends of a magnetizing branch in parallel, and accurate calculation of the iron core loss caused by the magnetizing flux linkage in the whole working area of the motor is achieved. Based on the variable equivalent leakage magnet power consumption resistance, the iron core loss caused by the leakage flux linkage is calculated, the resistance should be connected to the two ends of the leakage inductor in parallel, and accurate calculation of the iron core loss caused by the leakage flux linkage in the whole working area of the motor is achieved.
Description
technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor modeling, in particular to a permanent magnet synchronous motor modeling technology based on predictable iron loss. Background technique [0002] At present, in the field of permanent magnet synchronous motor modeling, the equivalent circuit model based on predictable iron loss is one of the more commonly used and effective modeling methods. Most of them use equivalent iron loss resistors with fixed resistance and inductance with fixed parameters. In some modeling processes, the iron core loss caused by the leakage flux linkage of the motor will be ignored. However, the existing above-mentioned setting of the model also has some obvious defects, such as: 1. The equivalent iron loss resistance of the fixed resistance is mostly determined by the measured data when the motor is running at the rated speed, but the iron core loss of the motor It is a quantity closely related...
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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor张承宁把鑫张硕
OwnerBEIJING INSTITUTE OF TECHNOLOGYGY