scholarly journals Analysis and Compensation of Dead-Time Effect of a ZVT PWM Inverter Considering the Rise- and Fall-Times

2016 ◽  
Vol 6 (11) ◽  
pp. 344 ◽  
Author(s):  
Hailin Zhang ◽  
Baoquan Kou ◽  
Lu Zhang ◽  
He Zhang
Keyword(s):  
Dead Time ◽  
Time Effect ◽  
Pwm Inverter

scholarly journals Modified Technique of Parameter Identification of a Permanent Magnet Synchronous Motor with PWM Inverter in the Presence of Dead-Time Effect and Measurement Noise

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1200 ◽  
Author(s):  
Aleksandr Mamatov ◽  
Sergey Lovlin ◽  
Toomas Vaimann ◽  
Anton Rassõlkin ◽  
Sergei Vakulenko ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Parameter Identification ◽  
Frequency Response Function ◽  
Dead Time ◽  
Permanent Magnet Synchronous Motor ◽  
Time Effect ◽  
Parameters Estimation ◽  
Modified Technique ◽  
Pwm Inverter ◽  
Nonlinear Disturbances

The paper considers the problem of parameter identification of the surface mounted permanent magnet synchronous motor (SPMSM) with pulse width modulated (PWM) inverter in the presence of dead time of power switches and other nonlinear distortions. Parameter identification of the SPMSM is required for the tuning of the torque control loop, because in some cases, the exact values of phase resistances and inductances are not known. In the absence of nonlinear disturbances, the problem of SPMSM parameters estimation is not difficult. The influence of the dead-time effect, back electromotive force and measurements noise introduces distortions in experimental output data sets, which leads to incorrect parameter estimation. Thus, there is a need to develop new designs of identification experiments and methods of processing of the experimental data. A detailed mathematical model of SPMSM with a PWM inverter in the presence of dead-time effect is considered in the paper. The negative influence of the dead-time effect on the results of parameter estimation is shown. A modified technique of parameter identification of SPMSM based on the estimation of frequency response function is proposed. The applied design of identification experiments, the type of excitation input signal, and methods of data processing allow us to minimize the influence of nonlinear disturbances and to reduce the variance of estimation of frequency response function. These features provide a high performance of SPMSM parameters estimation.

IMPROVED DEAD TIME EFFECT COMPENSATOR FOR PWM INVERTER

2017 ◽  
Vol 17 (6) ◽  
pp. 1575-1580
Author(s):  
Chang-Seok Park ◽  
Tae-Uk Jung
Keyword(s):  
Dead Time ◽  
Time Effect ◽  
Pwm Inverter

scholarly journals Dead-Time Correction Applied for Extended Flux-Based Sensorless Control of Assisted PMSMs in Electric Vehicles

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 220
Author(s):  
Cheng Lin ◽  
Jilei Xing ◽  
Xingming Zhuang
Keyword(s):  
Control System ◽  
Electric Vehicles ◽  
Dead Time ◽  
Sensorless Control ◽  
Correction Method ◽  
Time Effect ◽  
Dead Time Correction ◽  
Speed Range ◽  
Time Correction ◽  
The Dead

Sensorless control technology of PMSMs is of great importance for safety and reliability in electric vehicles. Among all existing methods, only the extended flux-based method has great performance over all speed range. However, the accuracy and reliability of the extended flux rotor position observer are greatly affected by the dead-time effect. In this paper, the extended flux-based observer is adopted to develop a sensorless control system. The influence of dead-time effect on the observer is analyzed and a dead-time correction method is specially designed to guarantee the reliability of the whole control system. A comparison of estimation precision among the extended flux-based method, the electromotive force (EMF)-based method and the high frequency signal injection method is given by simulations. The performance of the proposed sensorless control system is verified by experiments. The experimental results show that the proposed extended flux-based sensorless control system with dead-time correction has satisfactory performance over full speed range in both loaded and non-loaded situations. The estimation error of rotor speed is within 4% in all working conditions. The dead-time correction method improves the reliability of the control system effectively.

scholarly journals Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

2015 ◽  
Vol 92 (2) ◽  
Author(s):  
Byoung-moo Ann ◽  
Younghoon Song ◽  
Junki Kim ◽  
Daeho Yang ◽  
Kyungwon An
Keyword(s):  
Dead Time ◽  
Second Order ◽  
Time Effect
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