A modified PWM scheme in order to obtain spatial information of AC machines without mechanical sensor
A modified PWM scheme in order to obtain spatial information of AC machines without mechanical sensor
复制标题
一种改进的 PWM 方案，无需机械传感器即可获取交流电机的空间信息
DOI：
10.1109/apec.2002.989264
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. Machl
中科院分区：
文献类型：
--
作者：
T. Wolbank;J. Machl
为了实现即使在零速度下也能工作的交流电机的无传感器控制，需要额外的高频激励。最近已经提出了不同的方案，其使用由电压源逆变器的切换引起的瞬态激励。由于任何额外的激励也对机器的电流涟漪和噪声发射产生影响，因此已经进行了调查，以将基波和瞬态激励集成到一个逆变器控制方案中。在本文中，提出了一种新的修改的PWM方案，使基波励磁产生的磁通和转矩的机器，以及必要的瞬态励磁，以获得无传感器控制信号。仿真和测量结果显示了该方案的优点和局限性。
To realise the sensorless control of AC machines which are able to work even at zero speed, an additional high frequency excitation is necessary. Different schemes have been presented recently, which use an transient excitation caused by the switching of the voltage source inverter. As any additional excitation also has an impact on the current ripple and the noise emission of a machine, investigations have been made to integrate the fundamental wave and the transient excitation into one inverter control scheme. In this paper, a new modified PWM scheme is presented which enables both the fundamental wave excitation to generate the flux and the torque of the machine as well as the transient excitation necessary to obtain sensorless control signals. Simulations as well as measurement results are given to show the advantages and limits of the proposed scheme.