This article proposes an efficient maximum-torque-per-square-ampere (MTPSA) control for the interior permanent magnet synchronous machines (IPMSMs). The objective of the MTPSA control is to find the optimal current angle, denoted as MTPSA angle, to maximize the ratio of the output torque to the square of the stator current. The proposed MTPSA control is equivalent to the maximum-torque-per-ampere (MTPA) control, but it can eliminate the need of machine parameters and thus is independent of parameter variation. This article first derives the MTPSA control objective from the machine model considering cross-coupling inductances. Then, computation-efficient gradient descent algorithm is employed to detect the MTPSA angle from the derived objective. The proposed MTPSA control is based on available measurements without the need of machine parameters and invasive signal injection, which has not been simultaneously achieved in existing MTPA controls. The proposed control is validated with simulations, experiments, and comparisons with existing approaches on a laboratory IPMSM.

中文翻译：

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考虑交叉饱和电感的内部 PMSM 的最大每平方安培转矩控制

本文为内部永磁同步电机 (IPMSM) 提出了一种有效的最大每平方安培扭矩 (MTPSA) 控制方法。MTPSA 控制的目标是找到最佳电流角，表示为 MTPSA 角，以最大化输出转矩与定子电流平方的比率。所提出的 MTPSA 控制等效于每安培最大扭矩 (MTPA) 控制，但它可以消除对机器参数的需求，因此与参数变化无关。本文首先从考虑交叉耦合电感的机器模型推导出 MTPSA 控制目标。然后，采用计算效率高的梯度下降算法从导出的目标中检测 MTPSA 角度。建议的 MTPSA 控制基于可用的测量，不需要机器参数和侵入性信号注入，这在现有的 MTPA 控制中无法同时实现。通过模拟、实验以及与实验室 IPMSM 上现有方法的比较，对建议的控制进行了验证。