Encoderless servo drive with adequately designed IPMSM for pulse voltage injection based position detection

2011 ◽  
Author(s):  
S. Murakami ◽  
M. Hisatsune ◽  
T. Shiota ◽  
M. Ohto ◽  
K. Ide
Keyword(s):  
Pulse Voltage ◽  
Servo Drive ◽  
Position Detection

Encoderless Servo Drive With Adequately Designed IPMSM for Pulse-Voltage-Injection-Based Position Detection

2012 ◽  
Vol 48 (6) ◽  
pp. 1922-1930 ◽  
Author(s):  
Sohji Murakami ◽  
Takayuki Shiota ◽  
Motomichi Ohto ◽  
Kozo Ide ◽  
Masaki Hisatsune
Keyword(s):  
Pulse Voltage ◽  
Servo Drive ◽  
Position Detection

Initial position detection for Selective Compliance Assembly Robot Arm manipulator joint based on an improved high-frequency injection method

2019 ◽  
Vol 234 (8) ◽  
pp. 912-921
Author(s):  
Wenqi Lu ◽  
Di Wu ◽  
Jian Lin ◽  
Kaiyuan Lu ◽  
Dong Wang ◽  
...  
Keyword(s):  
High Frequency ◽  
Simulation Analysis ◽  
Initial Position ◽  
Robot Arm ◽  
Servo Drive ◽  
Position Information ◽  
Injection Method ◽  
Object A ◽  
Position Detection ◽  
Voltage Signal

Starting oscillation or slow response will occur if the initial position of the motor used in the Selective Compliance Assembly Robot Arm manipulator is not known. To obtain the initial position of the motor, an improved high-frequency injection method is proposed. First, a high-frequency rotating voltage signal is injected into the stationary coordinate system, and the initial position information is extracted by the heterodyne method. Second, an improved position tracking observer is proposed to estimate the rotor position. Taking the joint of a four-axis Selective Compliance Assembly Robot Arm as an object, a special position servo drive system is designed. The design principle, simulation analysis and experimental verification of the proposed method are presented, respectively. The results show that the initial position of the motor can be estimated by the proposed method, enabling high torque and fast start of the Selective Compliance Assembly Robot Arm manipulator.

Recent Challenges and Advances in the Sensorless Commutation of Brushless DC Motors

2020 ◽  
Vol 13 ◽  
Author(s):  
Umesh Kumar Soni ◽  
Ramesh Kumar Tripathi
Keyword(s):  
Initial Position ◽  
Position Estimation ◽  
Current Response ◽  
Flux Linkage ◽  
Brushless Dc Motors ◽  
Position Sensing ◽  
Brushless Dc ◽  
Dc Motors ◽  
Reverse Torque ◽  
Position Detection

Background: Brushless DC motors are highly efficient motors due to its high torque to weight ratio, compact design, high speed operating capability and higher power density. Conventional Hall sensor based rotor position sensing is affected by the heating, vibration, interference and noise. Objective: The innovative, cost effective and easily implementable sensorless techniques are essential in order to achieve high efficiency, reduced current and reduced torque pulsations. Further, a delay free, high load fast startup is also important issue. Methods: In this paper an extensive review of various techniques based on the detection of freewheeling diode current, phase back EMF zero crossoing point detection, back EMF integration method and third harmonic back EMF was done. The study and effect of various PWM strategies on back EMF detection was studied. Later on the sensorless schemes based on flux linkage estimation and flux linkage increment were introduced. The load torque observers, unknown input observers, sliding mode observers, L∞-induced observers, H ∞ - deconvolution filter for back EMF estimation were also reviewed. As the brushless DC motors have no back EMF at starting and for back EMF based commutation a minimum speed is required for sufficient back EMF. Therefore various strategies of open and close-loop reduced current startup have been studied to achieve effective commutation without reverse torque. Initial position detection (IPD) schemes, which are mostly based on saliency and current response to inductance variation, is effective where reverse torque is strictly prohibited. A detailed review of these initial position detection techniques (IPD) has also been presented. Results: The detailed mathematical and graphical analysis has been presented here in order to understand the working of the state-of-art sensorless techniques. Conclusion: The back EMF detection using direct and indirect methods of terminal voltage filtering have the problem of delay and attenuation, PWM noise, freewheeling diode spikes and disturbance in detected back EMFs is a drawback. The parameter detuning, underestimation and overestimation, offset problem, system noise and observer gain variation etc. limit the applicability of observer based technique. Therefore, a more robust and precise position estimation scheme is essential.

Electrochemical reduction of NaBO2 into NaBH4 with pulse voltage using the Eu-Co-Ni-B coating electrode

2020 ◽  
pp. 1-10
Author(s):  
Shimin Zhang ◽  
Biqing Chen ◽  
Lixia Gao ◽  
Tongtong Xiong ◽  
Chan Du ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Pulse Voltage ◽  
Coating Electrode ◽  
The Eu

Application of High Performance Electro-Hydraulic Synchronous Servo System on NC Broaching Machine

2013 ◽  
Vol 721 ◽  
pp. 497-500
Author(s):  
Guo Jin Chen ◽  
Jing Ni ◽  
Ting Ting Liu ◽  
Ming Xu
Keyword(s):  
High Performance ◽  
Control Process ◽  
Servo System ◽  
Numerical Control ◽  
Servo Drive ◽  
Loop Control ◽  
Performance Accuracy ◽  
Drive Control ◽  
Hydraulic Servo ◽  
Output Quantity

Aiming at the lower performance, accuracy and efficiency of the existing motion control process for the traditional broaching machine, the paper studies the high-performance dual-hydraulic synchronous servo drive control technology. The synchronous electro-hydraulic servo system forms the closed loop control by the detection and feedback of the output quantity. It eliminates and restrains largely the influence of the adverse factors to obtain the high-precision synchronous driving performance. The numerical control system based on the real-time error compensation and the intelligent control to the auxiliary machinery is developed. It is used for the CNC broaching machine to make the steady-state synchronous displacement error of the double cylinders be ≤ 0.5mm.

scholarly journals Control of the servo drive and the regulating body of the software

2021 ◽  
Vol 1111 (1) ◽  
pp. 012028
Author(s):  
M V Konstantinova ◽  
E A Guseva ◽  
V V Kondrat’ev ◽  
A D Kolosov
Keyword(s):  
Servo Drive
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