scholarly journals PMSM Rotor Position Detection Based on Hybrid Optical Encoder and R-Signal Zero-Setting Scheme

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Yaoqiang Wang ◽  
Xiaoyong Ma ◽  
Mingdong Wang ◽  
Chong Cao
Keyword(s):  
Control System ◽  
High Precision ◽  
Good Control ◽  
Detection Methods ◽  
Control Performance ◽  
Optical Encoder ◽  
Rotor Position ◽  
Position Detection

Rotor position detection is a prerequisite for achieving good control performance of PMSM. For a PMSM control system based on an optical encoder, it is a difficulty to detect rotor position and achieve R-Signal zero-setting. To solve the problem, a hybrid optical encoder is used in the paper by which a scheme for rotor position detection and R-Signal zero-setting is proposed. This encoder can do absolute and incremental rotor position detection simultaneously; here, the former is used for acquiring imprecise rotor position and the latter is for precise rotor position. Firstly, two detection methods of the encoder are analyzed, and a scheme for rotor position detection is proposed: absolute rotor position is used for motor starting before achieving R-Signal zero-setting; once achieving R-Signal zero-setting, incremental rotor position detection that has high precision is adopted. Then a novel scheme for R-Signal zero-setting is emphatically proposed. Finally, the simulation is conducted. Results show that rotor position detection and R-Signal zero-setting can be achieved by the proposed scheme.

scholarly journals Design of high precision mechatronic-hydraulic leveling system for vehicle-mounted radar

2021 ◽  
Vol 2113 (1) ◽  
pp. 012041
Author(s):  
Jun Xiao ◽  
YanChao Wang ◽  
XiangYu Li ◽  
Jie Zheng
Keyword(s):  
Control System ◽  
High Precision ◽  
Control Method ◽  
Good Control ◽  
Vehicle Body ◽  
Control Performance ◽  
Fuzzy Pid Control ◽  
Short Time ◽  
Leveling Control ◽  
The Mathematical Model

Abstract In order to improve the control performance of vehicle-mounted radar, a high precision leveling control system is designed through mechatronic-hydraulic integration technology. A leveling method combining angle error leveling method and height error leveling method is designed, and inclinometers are set in the front and rear of the vehicle body platform to effectively eliminate the virtual outrigger phenomenon in the leveling process. The mathematical model of hydraulic system is developed, the fuzzy PID control method is introduced, and the four-point support hydraulic leveling control system is developed by using STM32 microcontroller as the control core. The field test proves that the control system has good control performance, high leveling accuracy, short time, and meets the control requirements of the radar vehicle.

Application of PID in Controllable Pitch Propeller of a Multipurpose Ocean Tug

2013 ◽  
Vol 464 ◽  
pp. 253-257
Author(s):  
Hui Fang Chen
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
High Reliability ◽  
Control Process ◽  
Good Control ◽  
Control Performance ◽  
Hardware Configuration ◽  
Design Idea ◽  
And Control

This paper takes the automatic control system of controllable pitch propeller in a multipurpose ocean tug as an example to describe the application of the S7-200 series PLC in the control system of 4500 horse power controllable pitch propeller in detail. The principle of control system is addressed, as well as the hardware configuration, the design idea of the main software and control process. The system shows high reliability, accuracy and good control performance in practical in practical running.

Excitation Liquid-Cooled Retarder Control System Design Based on MC9SXS128

2014 ◽  
Vol 525 ◽  
pp. 583-587
Author(s):  
Bing Tu ◽  
Wei Zhang ◽  
Teng Xi Zhan
Keyword(s):  
Control System ◽  
Pid Control ◽  
Control Algorithm ◽  
Closed Loop ◽  
Good Control ◽  
Control Performance ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Application Requirements

This paper presented a excitation liquid-cooled retarder control system based on a microprocessor MC9SXS128. In order to achieve the constant speed, It used PWM to adjust the output current of excitation liquid-cooled retarder. It analyzed and calculated the inductance value in PWM output circuit and also analyzed the excitation liquid-cooled retarder control systematical mathematical model . It divided the brake stalls based on the current flowing through the field coil. by adding the PID closed-loop control system, the retarder could quickly reach the set speed. It tested the PID control algorithm at the experiments in retarder drum test rig and the results show that the control algorithm has good control performance to meet the application requirements.

Position Detection Methods of Position Sensor-Less Brushless DC Motor

2011 ◽  
Vol 179-180 ◽  
pp. 707-712
Author(s):  
Hua Ji ◽  
Zhen Yun Han ◽  
Hong Li Liu
Keyword(s):  
High Speed ◽  
Control Method ◽  
Dc Motor ◽  
Detection Methods ◽  
Brushless Dc Motor ◽  
Position Sensor ◽  
Less Is More ◽  
Rotor Position ◽  
Brushless Dc ◽  
Position Detection

With the widely use of Permanent Magnet Brushless DC Motor (BLDCM) in many fields, the superiority in the control method of position sensor-less is more and more obvious. In this paper several control methods of position sensor-less for BLDCM are presents, and a novel technique, the method of speed-independent position function, is introduced to detect the rotor position of BLDCM. This method may detect the rotor position from almost zero speed to high speed, and may also give the commutation time.

A Design of Position Closed-Loop Control System for Hybrid Stepping Motors Based on Mechanical-Sensorless Rotor Position Detection

2014 ◽  
Vol 644-650 ◽  
pp. 632-635
Author(s):  
Yu Zhou ◽  
Zhang Ge Cheng ◽  
Xiao Ying Tuyu
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Stepping Motor ◽  
Loop Control ◽  
Rotor Position ◽  
Position Detection ◽  
Closed Loop Control System ◽  
Hybrid Stepping Motor ◽  
Loop Control System

In a stepping motor, the flux linkage with a phase winding is a function of rotor position and phase current. Employing inductance saliency to detect rotor position is suitable for hybrid stepping motor (HSM) for its saturation feature. This paper will introduce a position closed-loop control system for HSM with rotor position detection by monitoring chopping characteristics, and present simulation results based on Matlab/Simulink.

Research on Sensorless Control System of BLDCM Based on TMS320F2812

2012 ◽  
Vol 580 ◽  
pp. 301-305
Author(s):  
Jian Guang Zhu ◽  
Kai Jiang ◽  
Hao Zheng
Keyword(s):  
Control System ◽  
Dynamic Characteristics ◽  
Good Control ◽  
Electronic Control ◽  
Control Performance ◽  
Zero Crossing ◽  
Low Speed ◽  
Coupling Noise ◽  
Electronic Control System ◽  
Crossing Point

An electronic control system for sensorless BLDCM is proposed. Normally, the back-emf signal has coupling noise from the PWM signal which is used to vary the speed of the motor. So it is difficult to detect the zero-crossing point accurately when the motor work at low speed. In order to improve the controllability of BLDCM at low speed, a new algorithm is presented. The control system is implemented from both hardware and software parts. And the experiments verified the good control performance and dynamic characteristics of the system.

Detection and its Application of Real-Time Rotor Position with High-Precision for Switched Reluctance Motor Drive

2013 ◽  
Vol 415 ◽  
pp. 227-231
Author(s):  
Yan Cai ◽  
Yan Bin Wen ◽  
Chen Hui Wang ◽  
Shao Xiong Fan ◽  
Wen Tao Jiang
Keyword(s):  
Real Time ◽  
High Precision ◽  
High Performance ◽  
Switched Reluctance Motor ◽  
Motor Drive ◽  
Switched Reluctance ◽  
Rotor Position ◽  
Position Detection ◽  
Position Signal ◽  
Reluctance Motor

It is very important to detect the accurate rotor position of switched reluctance motor (SRM) for a high-performance switched reluctance motor drive. And, there are two main factors to influence SRMs rotor position detection, which are the accuracy of the position signal and the controllers real-time response. It cant meet the accuracy requirements to detect shaft position information by opto-couplers, so absolute encoder is used to produce the high-precision rotor position signal. Moreover, the all-digital controller based on DSP and CPLD achieves the real-time detection and applications of high-precision rotor position signal on SRM, with their strong ability on data processing and hardware logic describing. Due to adopting high-precision rotor position detection and control, it carries out successfully and improves the system performance. The experimental results show that the design is reliable and effective, which has great significance for the establishment and realization of high-performance SRM drive.

Comparative Analysis of Rotor Position Detection Technology in the SFC Soft Starting of Pump Storage Motor

2013 ◽  
Vol 387 ◽  
pp. 262-266
Author(s):  
Lian Tao Ji ◽  
De Shun Wang ◽  
Bo Yang ◽  
Guan Jun Li
Keyword(s):  
Frequency Converter ◽  
Control Device ◽  
Detection Methods ◽  
Storage Unit ◽  
Flux Observer ◽  
Rotor Position ◽  
Stator Windings ◽  
Position Detection ◽  
Detection Technology ◽  
Terminal Voltage

Static Frequency Converter (SFC) is the key control device of reversible pump storage unit. By inputting a variable frequent current to the corresponding stator windings, the SFC can steadily start the synchronous motor. In this process, rotor position detecting accuracy comes to be the key point, but at the ultra-low speed period, the motors terminal voltage is too low to accurate sampling and is also vulnerable to the interference, which brings risks to the variable frequency starting. In this paper, two initial rotor position detection methods are compared, one is based on the voltage vector, and the other is based on adapt flux observer. At last, a 300MW/15.75kV pump storage unit with a 6 pulses SFC are built on the RTDS platform to exam the control strategy.

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