PMLSM force and back-EMF constant

2 次查看（过去 30 天）
LeGa
LeGa 2023-11-1
编辑： Yahav 2025-7-23
PMLSM block's description defines an equality of force and back-EMF constants. But such equality is correct for single phase of linear motor only, isn't it? In this case, catalogue force and back-EMF constants must be reduced to single phase ones.

请先登录，再回答此问题。

回答（2 个）

Sabin
Sabin 2025-6-4
编辑：Sabin 2025-6-4
The back EMF constant is the peak voltage induced by the permanent magnet in the per-unit rotational speed of each of the phases. The force constant is the peak force induced by the per-unit current of each of the phases. It is numerically identical in value to the back EMF constant when both are expressed in SI units.
  1 个评论
LeGa
LeGa 2025-6-6
Or more simply: force and back-EMF constants are equal for single phase of rotary or linear motors in SI units. Thus, catalogue motor's data must be reduced to single phase. Must be noted that such constants are presented by different units (peak, RMS, 0-peak, peak-to-peak) with different manufacturers.

请先登录，再进行评论。

Yahav
Yahav 2025-7-23
编辑：Yahav 2025-7-23
I understand that the definitions of the motor constants are:
Force constant: N/Apeak , BEMF constant: (Vphase peak)/(m/s)
I recommend adding this to the block help.
The block should yield the same results, regardless if using Force constant (Kf), BEMf constant (Kv), or Flux linkage constant (PM). However, this is not the case in the example model: "Three-Phase PMLSM Drive". The PMLSM block has force constant: 0.18 N/A, BEMF constant: 0.18 V/(m/s), and Flux linkage constant: 0.65 Wb. The model tuned to use the PM constant, but when switching to Kf or Kv, it yields different results and its not following the ref profile. Kfand Kv yields same results, but not equal PM
Attached is a modified model which includes a BEMF test at imposed speed. both Kf and Kv yields good results, but not the PM.

类别

在 Help Center 和 File Exchange 中查找有关 Motor Drives 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by