A speed sensorless vector control system of induction motor with estimated rotor speed and rotor flux using a new reduced order extended Kalman filter is proposed. With this method, two rotor flux components are selec...A speed sensorless vector control system of induction motor with estimated rotor speed and rotor flux using a new reduced order extended Kalman filter is proposed. With this method, two rotor flux components are selected as the state variables, and the rotor speed as an estimated parameter is regarded as an augmented state variable. The algorithm with reduced order decreases the computational complexity and makes the proposed estimator feasible to be implemented in real time. The simulation results show high accuracy of the estimation algorithm and good performance of speed control, and verify the usefulness of the proposed algorithm. 展开更多
This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized ...This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized for speed estimation. Additionally this system solved the online identification of stator resistance by d-axis flux error. The advantages of the proposed system are simplicity and avoidance of the problems caused by only using a voltage model. The effectiveness of the proposed system has been verified by simulation and experimentation.展开更多
A speed-sensorless vector control system for induction machines (IMs)is presented, According to the vector control theory of IMs, the rotor flux is estimated based on a flux observer,and the speed is estimated throu...A speed-sensorless vector control system for induction machines (IMs)is presented, According to the vector control theory of IMs, the rotor flux is estimated based on a flux observer,and the speed is estimated through the method of q-axis rotor flux converging on zero with proportional integral regulator, A 0.75 kW,50 Hz,two-pole induction machine was used in the simulation and experimental verification, The simulation model was constructed in Matlab. A series of tests were performed in the field weakening region, for both no-load and loaded operation. The estimated speed tracks the actual speed well in the based speed region and field weakening region ( 1 per unit value to 4 per unit value). The small estimation error of residual speed is due to the existence of slip.展开更多
A method of improving the stability of multiple-motor drive system fed by a 3-leg single inverter has been devised that employs the averages and differences of estimated parameters for field-oriented control. The para...A method of improving the stability of multiple-motor drive system fed by a 3-leg single inverter has been devised that employs the averages and differences of estimated parameters for field-oriented control. The parameters of each motor (stator current, rotor flux, and speed) are estimated using adaptive rotor flux observers to achieve sensorless control. The validity and effective of the proposed method have been demonstrated through simulations and experiments.展开更多
针对传统转杯纺纱机单锭高速驱动系统电机传感器安装困难和转速不稳定问题,文中提出了一种采用高速无刷直流电机滑模自适应观测+PID(Proportional Integral Derivative)控制的无传感器控制算法,结合电机矢量控制模式实现电机的精准控制...针对传统转杯纺纱机单锭高速驱动系统电机传感器安装困难和转速不稳定问题,文中提出了一种采用高速无刷直流电机滑模自适应观测+PID(Proportional Integral Derivative)控制的无传感器控制算法,结合电机矢量控制模式实现电机的精准控制。通过改进滑模观测器结构减少传统滑模观测算法的趋近速率慢和电机抖振问题,实现转子位置的快速准确估计,提高系统的鲁棒性。采用嵌入式控制技术开发转杯纺电机的驱控系统,对控制算法进行移植和实现,解决了传统转杯纺纱电机系统转速低、转速抖振大和传感器安装困难等问题。通过实验测试实现了转杯纺纱高速无刷电机系统高平稳转速和无传感器控制的目标,在电机高转速100000 rpm下的抖振率达到2%以内。展开更多
针对永磁同步电机下桥臂电流采样拓扑的无位置传感器控制系统,在低载波运行时受数字延时影响易导致位置估计精度低、电流纹波增大、稳定性差等问题,提出一种半周期计算、单采样双更新的空间矢量脉宽调制方法,有效减少系统数字延时。该...针对永磁同步电机下桥臂电流采样拓扑的无位置传感器控制系统,在低载波运行时受数字延时影响易导致位置估计精度低、电流纹波增大、稳定性差等问题,提出一种半周期计算、单采样双更新的空间矢量脉宽调制方法,有效减少系统数字延时。该方法在每个脉冲宽度调制(Pulse-Width Modulation,PWM)的载波过零处采样一次电流,并在采样结束后的半周期内完成目标电压矢量计算。考虑数字延时中电机转过的角度,将目标电压矢量在下一个PWM周期的前、后半周期输出,并分别补偿0.75 T s和1.25 T s等效延时(T s为PWM周期时间),以减小目标电压矢量与实际输出电压矢量之间的误差。将新方法应用于采用模型参考自适应速度观测器的永磁同步电机无位置传感器控制系统中,实验结果表明该方法位置估计精度高、电流纹波小,且可以稳定运行于额定负载、载波比为4.0的工况。展开更多
摘要A speed sensorless vector control system of induction motor with estimated rotor speed and rotor flux using a new reduced order extended Kalman filter is proposed. With this method, two rotor flux components are selected as the state variables, and the rotor speed as an estimated parameter is regarded as an augmented state variable. The algorithm with reduced order decreases the computational complexity and makes the proposed estimator feasible to be implemented in real time. The simulation results show high accuracy of the estimation algorithm and good performance of speed control, and verify the usefulness of the proposed algorithm.
摘要This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized for speed estimation. Additionally this system solved the online identification of stator resistance by d-axis flux error. The advantages of the proposed system are simplicity and avoidance of the problems caused by only using a voltage model. The effectiveness of the proposed system has been verified by simulation and experimentation.
摘要A speed-sensorless vector control system for induction machines (IMs)is presented, According to the vector control theory of IMs, the rotor flux is estimated based on a flux observer,and the speed is estimated through the method of q-axis rotor flux converging on zero with proportional integral regulator, A 0.75 kW,50 Hz,two-pole induction machine was used in the simulation and experimental verification, The simulation model was constructed in Matlab. A series of tests were performed in the field weakening region, for both no-load and loaded operation. The estimated speed tracks the actual speed well in the based speed region and field weakening region ( 1 per unit value to 4 per unit value). The small estimation error of residual speed is due to the existence of slip.
摘要A method of improving the stability of multiple-motor drive system fed by a 3-leg single inverter has been devised that employs the averages and differences of estimated parameters for field-oriented control. The parameters of each motor (stator current, rotor flux, and speed) are estimated using adaptive rotor flux observers to achieve sensorless control. The validity and effective of the proposed method have been demonstrated through simulations and experiments.
摘要针对传统转杯纺纱机单锭高速驱动系统电机传感器安装困难和转速不稳定问题,文中提出了一种采用高速无刷直流电机滑模自适应观测+PID(Proportional Integral Derivative)控制的无传感器控制算法,结合电机矢量控制模式实现电机的精准控制。通过改进滑模观测器结构减少传统滑模观测算法的趋近速率慢和电机抖振问题,实现转子位置的快速准确估计,提高系统的鲁棒性。采用嵌入式控制技术开发转杯纺电机的驱控系统,对控制算法进行移植和实现,解决了传统转杯纺纱电机系统转速低、转速抖振大和传感器安装困难等问题。通过实验测试实现了转杯纺纱高速无刷电机系统高平稳转速和无传感器控制的目标,在电机高转速100000 rpm下的抖振率达到2%以内。
摘要针对永磁同步电机下桥臂电流采样拓扑的无位置传感器控制系统,在低载波运行时受数字延时影响易导致位置估计精度低、电流纹波增大、稳定性差等问题,提出一种半周期计算、单采样双更新的空间矢量脉宽调制方法,有效减少系统数字延时。该方法在每个脉冲宽度调制(Pulse-Width Modulation,PWM)的载波过零处采样一次电流,并在采样结束后的半周期内完成目标电压矢量计算。考虑数字延时中电机转过的角度,将目标电压矢量在下一个PWM周期的前、后半周期输出,并分别补偿0.75 T s和1.25 T s等效延时(T s为PWM周期时间),以减小目标电压矢量与实际输出电压矢量之间的误差。将新方法应用于采用模型参考自适应速度观测器的永磁同步电机无位置传感器控制系统中,实验结果表明该方法位置估计精度高、电流纹波小,且可以稳定运行于额定负载、载波比为4.0的工况。