Search results for: Ying-Shieh Kung
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The rotor position estimation and the speed control for drives of the ceiling fan motor (an outer-rotor permanent magnet synchronous motor) are studied in this paper. Then, the implementation of the aforementioned estimator and control algorithm using FPGA (Field Programmable Gate Array) is proposed. In the aspect of the rotor speed control, an I-ƒ start-up strategy is applied when the motor runs...
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To obtain a wide-speed range control from a standstill to a high speed region, combining the approaches - LF (Low Frequency) signal injection and EKF (Extended Kalman Filter) in sensorless PMSM drive is proposed in this paper. The LF signal injection algorithm is applied to the startup and low-speed mode for the SPMSM; then it will transfer to the medium or high speed mode using the EKF algorithm...
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Microsystem Technologies > 2018 > 24 > 1 > 243-253
Based on field programmable gate array (FPGA) technology, a realization of a servo/motion control system with the self-tuning PID controller for X–Y table is presented in this work. Firstly, to cope with the system and external load uncertainly, a Radial Basis Function Neural Network (RBF NN) is applied to identify the dynamic model of the X-axis table and Y-axis table and to provide the information...
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Among the sensorless PMSM speed control algorithms, the non-model based approach, such as high frequency (HF) signal injection (HFSI), is usually taken as to estimate the rotor position of PMSM at standstill and very low speed condition, but the model based approach, such as extended Kalman filter (EKF) is suitable to the low/medium/high speed condition for PMSM drive. Therefore, to obtain a wide-speed...
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Microsystem Technologies > 2018 > 24 > 1 > 79-93
FPGA-realization of a rotor position estimation algorithm based on a novel sliding mode observer (SMO) for permanent magnet synchronous motor (PMSM) drives is adopted in this paper. Comparing to the conventional SMO, the estimator based on the novel SMO is presented for reducing the chattering phenomenon and improving the estimated precision of the rotor position. However, a hybrid sensorless control...
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Microsystem Technologies > 2018 > 24 > 1 > 19-26
This paper mainly focuses on studying the torque control with maximum torque per ampere (MTPA) technique based on fuzzy theory and without dealing with complex computation of torque control optimization for the interior permanent magnet synchronous motor (IPMSM). The IPMSM control system generally includes position, velocity and current loops. The speed command will compare with the actual speed sensed...
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Computers & Electrical Engineering > 2016 > 53 > C > 106-121
This work studies a digital hardware implementation of a radial basis function neural network (RBF NN) Firstly, the architecture of the RBF NN, which consists of an input layer, a hidden layer of nonlinear processing neurons with Gaussian function, an output layer and a learning mechanism, is presented. The supervising learning mechanism based on the stochastic gradient descent (SGD) method is applied...
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A hybrid sensorless control system for the permanent magnet synchronous motor (PMSM) drives using I-f startup method then a smooth transition to EKF-based (Extended Kalman Filter) sensorless field oriented control (FOC) is proposed in this paper. The solution of I-f simple startup method is suitable for the low-speed sensorless control without initial rotor position estimation and machine parameters...
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FPGA-realization of a rotor position estimation algorithm based on the novel sliding mode observer (SMO) and phase locked loop (PLL) for the permanent magnet synchronous motor (PMSM) drives is adopted in this paper. Comparing to the conventional SMO, the estimator based on the novel SMO and PLL is presented for reducing the chattering phenomenon and improving the estimated precision of the rotor position...
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Based on the FPGA (Field Programmable Gate Array), this paper presents an implementation of a sensorless PMSM speed control system which the rotor speed and rotor position are estimated by novel SMO method. The estimated rotor position can be sent back to the current loop for vector control and the estimated rotor speed can be fed back to the speed loop for closed-loop speed control. In realization,...
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Applied Mathematical Modelling > 2015 > 39 > 19 > 5816-5827
In this study, we propose a digital hardware implementation of a speed controller for a sensorless permanent magnet synchronous motor (PMSM) drive. First, the extended Kalman filter (EKF) is used to estimate the rotor flux angle (FA) and rotor speed. The estimated rotor FA is sent back to the current loop for vector control and the estimated rotor speed is fed back into the speed loop for closed-loop...
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The inverse kinematics for a robot manipulator with offset wrist is formulated as a minimization problem in this paper to reduce its complexity and accelerate the computation speed. A specific type of robot such as Yaskawa MA1400, which has an offset between the last two axes, is chosen for analysis. Given an initial guess angle of last joint, all the 6 joint angles can be easily found through analytical...
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Forward and inverse kinematic modeling is essential in trajectory planning for robot manipulators. An approach based on fixed-point format is presented in this paper to accelerate computation. Kinematics of a common industrial robot with last three axes intersecting at a point is first modeled in a form of closed-form solution. A method which integrates look-up tables and angle sum relationships for...
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Based on the extended Kalman filter (EKF) estimator and adaptive fuzzy controller (AFC), the design of a sensorless speed control IP (Intellectual Property) for PMSM (Permanent Magnet Synchronous Motor) drive is presented in this paper. Firstly, the mathematical model of PMSM is derived, and the vector control is built up. Secondly, the rotor flux angle (FA) and rotor speed, which are estimated by...
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An inverse kinematics IP (Intellectual Property) for six-axis articulated manipulator is investigated in this paper. Firstly, the formulation of the inverse kinematics for six-axis articulated manipulator is derived. Secondly, the computation algorithm and its hardware implementation of some key trigonometric functions are described. Thirdly, the IP design of inverse kinematics is illustrated and...
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This work realizes the speed control for permanent magnet synchronous motor (PMSM) drives under the condition of without position sensor. Rotor flux angle and rotor speed are obtained by using the algorithm of sliding mode observer. And the fuzzy controller is adopted for controlling the speed of PMSM in order to increase the robust performance. In this paper, we provide an approach from modeling,...
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Based on Simulink/Modelsim co-simulation technology, the design of EKF (Extended Kalman Filter) for sensorless PMSM (Permanent Magnet Synchronous Motor) drives is presented in this paper. Firstly, a mathematical model for PMSM is derived, the vector control is adopted and the EKF algorithm is introduced. Secondly, the estimation of the rotor flux position and rotor speed based on EKF is applied to...
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Mathematics and Computers in Simulation > 2013 > 90 > Complete > 28-44
The work presents a neural fuzzy controller (NFC) for speed loop of permanent synchronous motor (PMSM) drives based on the technology of field programmable gate array (FPGA). Firstly, a mathematic model of the PMSM drive is derived; then to increase the performance of the PMSM drive system, a fuzzy controller (FC) which its parameters are adjusted by a radial basis function neural network (RBF NN)...
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The work presents an adaptive PI controller for sensorless permanent synchronous motor (PMSM) drive system. A rotor flux position of PMSM is estimated by using a sliding mode observer (SMO), firstly. The estimated rotor position will send to the current loop for current vector control and simultaneously feedback to the speed loop for speed control. Then to increase the performance of the PMSM drive...
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Based on Simulink/Modelsim co-simulation technology, the design of a sensorless control IP (Intellectual Property) using reduced-order EKF (Extended Kalman Filter) for PMSM (Permanent Magnet Synchronous Motor) drive is presented in this paper. Firstly, a mathematical model for PMSM is derived and the vector control is adopted. Secondly, the rotor flux position and rotor speed are estimated by using...
