scholarly journals A Novel Single Winding Structure and Closed Loop Control of the Suspension Force Vector of Bearingless Permanent Magnet Synchronous Motors

Energies ◽  
2016 ◽  
Vol 9 (5) ◽  
pp. 377
Author(s):  
Huangqiu Zhu ◽  
Jianfei Yuan ◽  
Jintao Jv
Keyword(s):  
Permanent Magnet ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Force Vector ◽  
Permanent Magnet Synchronous Motors ◽  
Loop Control ◽  
Synchronous Motors

scholarly journals Sensorless Energy Conservation Control for Permanent Magnet Synchronous Motors Based on a Novel Hybrid Observer Applied in Coal Conveyer Systems

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2554 ◽  
Author(s):  
Shun Li ◽  
Xinxiu Zhou
Keyword(s):  
Energy Conservation ◽  
Closed Loop ◽  
Current Model ◽  
Estimation Algorithm ◽  
Closed Loop Control ◽  
Rotor Speed ◽  
Permanent Magnet Synchronous Motors ◽  
Loop Control ◽  
Synchronous Motors ◽  
Stator Current

A large number of permanent magnet synchronous motors (PMSMs) are used to drive coal conveyer belts in coal enterprises. Sensorless energy conservation control has important economic value for these enterprises. The key problem of sensorless energy conservation control for PMSMs is how to decompose the stator current through estimating the rotor position and speed accurately. Then a double closed loop control for stator current and speed is formed to make the stator current drive the motor as an entire torque current. In this paper, the proposed startup estimation algorithm can utilize the current model of PMSM as reference model to estimate the rotor speed and position in the startup stages. It is not dependent on the back electromotive force (EMF) which is used by the general estimation algorithm. However, the resistance will change with the temperature shift of stator windings, and these changes will cause the reference current model to be inaccurate and influence the rotor speed and position estimation precision. Thus, startup estimation algorithm switches to the proposed operation estimation algorithm which is based on the robust sliding mode theory and is not dependent on the motor parameters. The advantages of startup estimation algorithm and operation estimation algorithm are combined to form a hybrid observer. This hybrid observer realizes the accurate estimation of the rotor speed and position from start-up to operation. The stator current is precisely decomposed. The excitation current is controlled to 0. Meanwhile, the double closed-loop control of current and speed is achieved. The stator current is as entire torque current to drive motor. The closed-loop control, which is based on the proposed rotor position and speed estimation algorithm, achieve the most efficient conversion of electrical energy.

scholarly journals Multiobjective Optimization of PID Controller of PMSM

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Qingyang Xu ◽  
Chengjin Zhang ◽  
Li Zhang ◽  
Chaoyang Wang
Keyword(s):  
Pid Controller ◽  
Pareto Front ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Optimal Parameters ◽  
Objective Functions ◽  
Permanent Magnet Synchronous Motors ◽  
Nsga Ii ◽  
Loop Control ◽  
Synchronous Motors

PID controller is used in most of the current-speed closed-loop control of permanent magnet synchronous motors (PMSM) servo system. However,Kp,Ki, andKdof PID are difficult to tune due to the multiple objectives. In order to obtain the optimal PID parameters, we adopt a NSGA-II to optimize the PID parameters in this paper. According to the practical requirement, several objective functions are defined. NSGA-II can search the optimal parameters according to the objective functions with better robustness. This approach provides a more theoretical basis for the optimization of PID parameters than the aggregation function method. The simulation results indicate that the system is valid, and the NSGA-II can obtain the Pareto front of PID parameters.

scholarly journals Design and Analysis of Closed Loop Control of Multilevel SVPWM Inverter Fed PMSM Drive

2019 ◽  
Vol 8 (6S2) ◽  
pp. 809-816
Keyword(s):  
Permanent Magnet ◽  
Feedback Linearization ◽  
High Performance ◽  
Closed Loop ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Source ◽  
Closed Loop Control ◽  
Loop Control ◽  
Controlled Switching ◽  
Switching Devices

Permanent magnet synchronous machines have been universally used over induction machines in variable speed drives. For present trends and future developments, power electronics technology gives the extensive research of multilevel inverters that brings high safety voltages with low harmonic content in comparison with two-level inverter strategies. Multi level inverters implementation can be done by raising the number of power semi conductor controlled switching devices per phase to increase the number of inverter output voltage levels. By increasing the levels, power controlled switching devices and other components are increased, which makes the inverter complex and overpriced. From the above aspects, three-phase three-level inverter strategy is used for high performance and high voltage A.C drives. Multilevel inverter using a space vector pulse width modulation (SVPWM) strategy gives great advantages in high performance A.C drive applications. Various types of control strategies have been recommended for voltage source inverter fed A.C drives. In the proposed work, a PI controller is designed for the outer loop and non-linear controller using a state feedback linearization technique is designed for the inner loop. The closed loop control system for three-level inverter fed Permanent magnet synchronous motor drive employing SVPWM is extensively simulated using MATLAB.

Simulation Study of Permanent Magnet Synchronous Motors Energy Feedback Control System

2013 ◽  
Vol 380-384 ◽  
pp. 374-378
Author(s):  
Wei Wei ◽  
Peng Xue ◽  
Bin Zhang
Keyword(s):  
Permanent Magnet ◽  
Simulation Study ◽  
System Modeling ◽  
Feedback System ◽  
Permanent Magnet Synchronous Motors ◽  
Loop Control ◽  
Synchronous Motors ◽  
Energy Feedback ◽  
Voltage Vector ◽  
Space Voltage Vector

Combined with the brake working principle of Permanent magnet synchronous motors, the three-phase PWM rectifier mathematical model and Simulink simulation model are set up. On this basis, according to the design requirements of energy feedback system, the voltage current double-loop control is applied in this system. The space voltage vector tracking is achieved by the use of space voltage vector PWM algorithm. The system modeling and simulation study is conducted in the MATLAB simulation environment, and the correctness of the proposed program is verified, which provides the corresponding theoretical basis for the future product design.

Design of Permanent Magnet Synchronous Motor Control Chip Based on SOPC

2014 ◽  
Vol 654 ◽  
pp. 203-207
Author(s):  
Peng Fei Chen ◽  
Yue Nan Zeng ◽  
Zu Qun Peng ◽  
Li Zhi Wu
Keyword(s):  
Permanent Magnet ◽  
Closed Loop ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Closed Loop Control ◽  
Chip Design ◽  
Loop Control ◽  
Design Flexibility ◽  
Fpga Chip ◽  
Ip Reuse

This article presents a program for permanent magnet synchronous motor (PMSM) vector control chip design based on SOPC technology. Microprocessor NIOSII and hardware arithmetic unit such as CORDIC and SVPWM, were all integrated in a FPGA by using bus interconnect and IP reuse technology, so that became a dedicated control chip of PMSM. Using hardware and software co-design methods, the chip was designed on Altera's CycloneIII FPGA, chip design flexibility and use small resource. Finally, combined with the power driver board achieved the dual closed-loop control of PMSM. The results show that system have a good performance, which proved that system can be well controlled by the designed IC.

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