scholarly journals Minimization of dead time effect on bridge converter output voltage quality by use of advanced gate drivers

2019 ◽  
Author(s):  
Havard Lefdal Hove ◽  
Ole Christian Spro ◽  
Dimosthenis Peftitsis ◽  
Giuseppe Guidi ◽  
Kjell Ljokelsoy
Keyword(s):  
Output Voltage ◽  
Dead Time ◽  
Time Effect ◽  
Voltage Quality ◽  
Gate Drivers

A Method to Compensate the Dead Time for Three-Phase PWM Inverters

2014 ◽  
Vol 1044-1045 ◽  
pp. 681-687
Author(s):  
Wen Gui Pan ◽  
Lei Zhang ◽  
Yao Pu Zou ◽  
Chao Wang ◽  
Chang Pei Han
Keyword(s):  
Vector Control ◽  
Permanent Magnet ◽  
Disturbance Observer ◽  
Output Voltage ◽  
Dead Time ◽  
Permanent Magnet Synchronous Motor ◽  
Time Effect ◽  
Three Phase ◽  
On Line ◽  
Simulation Results

As for a vector control of a permanent magnet synchronous motor, this paper analyzed the influence of dead-time effect of three-phase bridge inverters on output voltage and current in details. A novel on-line method was proposed for dead-time effect compensation based on disturbance observer. At last, the method is simulated using MATLAB and the simulation results proves the effectiveness and feasibility of the method presented.

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

scholarly journals Induction Motor Drives Fed by an NPC Inverter with Unbalanced DC-Link

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1379 ◽  
Author(s):  
Umberto Abronzini ◽  
Ciro Attaianese ◽  
Matilde D’Arpino ◽  
Mauro Di Monaco ◽  
Giuseppe Tomasso
Keyword(s):  
Output Voltage ◽  
Harmonic Distortion ◽  
Voltage Regulation ◽  
Motor Drives ◽  
Operating Conditions ◽  
Switching Frequency ◽  
Voltage Level ◽  
Voltage Quality ◽  
Vector Modulation

Neutral Point Clamped (NPC) converters with n levels are traditionally controlled in such a way that the DC-link capacitors operate at 1/( n - 1) of the total DC-link voltage level. The voltage level across the DC-link capacitors has to be properly regulated by the capacitor unbalance control to contain the harmonic distortion of the converter output voltages. State-of-the-art modulation techniques address the problem of the DC-link voltage regulation for NPC inverters. However, they highly show reduced performance when unbalanced DC-link voltages are considered. In this paper, a novel Space Vector Modulation (SVM) is proposed for NPC converters with an unbalanced DC-link. At every modulation interval, the technique defines the optimal switching pattern by considering the actual unbalanced DC-link conditions. The proposed modulation allows improving the harmonic content of the NPC converter output voltage with respect to a traditional ML-SVM, when the same operating conditions are considered. As an extension, the proposed modulation technique will guarantee the same output voltage quality of a traditional ML-SVM with unbalanced DC-link, while improving the conversion efficiency thanks to a reduction of switching frequency.

Carrier-Based Modulation Strategy and its Dead-Time Compensation Method on Two-Stage Matrix Converter

2012 ◽  
Vol 562-564 ◽  
pp. 1509-1516
Author(s):  
Xu Dong Guo ◽  
Wen Hua Wu ◽  
Mei Su ◽  
Zhuo Wen Feng ◽  
Qun Tai Shen
Keyword(s):  
Dead Time ◽  
Matrix Converter ◽  
Time Effect ◽  
Compensation Method ◽  
Modulation Method ◽  
Two Stage ◽  
Compensation Methods ◽  
Dead Time Compensation ◽  
Vector Modulation ◽  
Modulation Voltage

To deal with the problem that dead time is indispensable and that its compensation is difficult to implement especially when taking Space Vector Modulation method to modulate the inverter stage of Two-Stage Matrix Converter (TSMC), this paper presents a Carrier-based Modulation (CBM) strategy suitable for the TSMC and amplifies concerned the uniqueness of the proposed CBM. Based on this, the dead-time effect to TSMC is analyzed, formula for describing dead-time effect is induced, and two compensation methods are given, namely modulation voltage modification method and time compensation method. At last, the uncompensated and compensated experiments are carried out on the prototype, and the results prove that this strategy meets the satisfaction.

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