Research on Weak Magnetic Control of IPMSM with Single Current Regulator Based on Improved Terminal Sliding Mode
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摘要: 针对水下航行器推进系统中永磁电机在深度弱磁工况下稳定性欠佳的问题, 文中以内置式永磁同步电机(IPMSM)为对象, 提出了一种基于改进双幂次趋近率的积分终端滑模控制(ITSMC)单电流调节器弱磁控制方法。该方法以电流极限圆和电压极限圆为基础, 在IPMSM基速以下采用最大转矩电流比(MTPA)控制, 基速以上采用变交轴电压单电流调节器(SCR-VQV)弱磁控制策略; 为增强系统鲁棒性, 在SCR-VQV控制的转速外环中提出一种改进双幂次趋近率的ITSMC替代传统比例积分控制; 最后通过实验证明了该弱磁控制系统稳定的深度弱磁能力。
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关键词:
- 水下航行器 /
- 内置式永磁同步电机 /
- 积分终端滑模控制 /
- 单电流调节器; 弱磁控制
Abstract: In view of the poor stability of permanent magnet motors in undersea vehicle propulsion systems under deep weak magnetic conditions, a weak magnetic control method with a single current regulator was proposed for the interior permanent magnet synchronous motor(IPMSM) based on integral terminal sliding mode control(ITSMC) of improved double power convergence rate. This method was based on the current limit circle and voltage limit circle. Below the base speed of the IPMSM, it adopted the maximum torque per ampere(MTPA) control. Above the base speed, it employed the single current regulator-variable Q-axis voltage(SCR-VQV) strategy for weak magnetic control. To enhance the system’s robustness, an ITSMC of improved double power convergence rate was proposed to replace the traditional proportional-integral control above the base speed under the SCR-VQV control. Finally, through experiments, the stable deep weak magnetic control capability of this weak magnetic control system was proved. -
图 7 PI和改进滑模的电压矢量角控制对比实验
Figure 7. Comparative experiment of PI and improved sliding mode voltage vector angle control
表 1 IPMSM参数
Table 1. Parameters of IPMSM
名称 参数值 单位 额定功率 2 500 W 额定电流 40 A 额定电压 60 V 极对数 4 直轴电感 5.25 mH 交轴电感 12 mH 定子电阻 0.958 Ω 永磁体磁通量 0.182 7 Wb 
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