【摘要】 内置式永磁同步电机(IPMSM)无位置传感器控制方法中，高频方波注入法滤波环节较少，位置观测环具有较好的动态性能。然而，逆变器非线性、电流测量误差等非理想因素导致观测的转子位置中呈现出较多的谐波成分，观测精度不高。二阶广义积分器因其良好的谐波抑制能力在并网逆变器控制系统中得到了广泛的应用，然而其对输入信号频率变化的响应能力较弱。为了兼顾IPMSM无位置传感器控制的动态性能和稳态精度，提出一种复合转子位置观测方法。针对高频方波注入法传统电流解调过程中非理想因素带来的估计误差较大的问题，采用二阶广义积分器统一地抑制其中的低频和高频谐波成分；通过设计高频注入传统电流解调算法与基于二阶广义积分器的电流解调算法的切换准则，保证复合方案转子位置观测算法的动态性能，规避二阶广义积分器动态调节能力弱的不利影响。基于18 kW永磁同步电机平台的实验验证所提方法的有效性。更多还原

【Abstract】 In sensorless control method of interior permanent magnet synchronous motor(IPMSM), the high-frequency square wave injection methods have fewer filtering links, therefore, presenting better dynamic performance of position observation loop. However, due to non-ideal factors such as inverter nonlinearity and current measurement error, numerous harmonic components appear in the observed rotor position, thus, the accuracy of observed rotor position is limited. The second-order generalized integrator has been widely used in grid-connected inverter control system on account of its good harmonic suppression ability, nevertheless, its dynamic response ability is weak when the frequency of input signal changes rapidly. In order to take into account both the dynamic performance and steady-state accuracy of IPMSM sensorless control system, a compound rotor position observation method was proposed. In terms of the large estimation error caused by non-ideal factors in the conventional current demodulation process, the low frequency and high frequency harmonic components were uniformly suppressed by a second-order generalized integrator. The dynamic performance of the compound rotor position observation method was guaranteed by designing the switching criterion between the conventional current demodulation method and the current demodulation method based on the second-order generalized integrator, also, the adverse effects caused by the weak dynamic response ability of the second-order generalized integrator are avoided. Experiments based on platform with an 18 kW permanent magnet synchronous motor verify effectiveness of the proposed method.更多还原