Permanent magnet synchronous motors (PMSMs) are high-efficiency, high-torque-density motors used in various industrial applications such as EVs and railroads, which require high-speed, high-precision control. While the use of a voltage type inverter in the drive system of a PMSM enables high efficiency and a wide range of control, the operating range of the PMSM is limited by the inverter's power supply voltage. Generally, the magnitude of the supply voltage is fixed and difficult to change. Therefore, it is important to expand the operating range of the PMSM by increasing the utilization ratio of the supply voltage, which can be achieved by using overmodulation and single-pulse driving.
A control method based on model predictive control has been proposed as a fast and accurate control method, but this method requires a large computational load. Therefore, previous studies have proposed methods to reduce the computational load while achieving control performance equivalent to existing methods. However, these methods have not yet investigated overmodulation and one-pulse driving.

In this study, we propose an optimal current control method for PMSM that takes into account overmodulation and one-pulse drive, aiming to expand the operating range of PMSM by utilizing overmodulation and one-pulse drive. The effectiveness of the proposed method is demonstrated by simulation and actual experiments.