Research of the dead-time compensation based on the three-phase grid-connected inverter

2012 ◽  
Author(s):  
Yan Liu ◽  
Hongqi Ben ◽  
Chunpeng Li ◽  
Daqing Wang
Keyword(s):  
Dead Time ◽  
Three Phase ◽  
The Dead ◽  
Grid Connected Inverter ◽  
Dead Time Compensation

scholarly journals Novel Dead-Time Compensation Strategy for Wide Current Range in a Three-Phase Inverter

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 92 ◽  
Author(s):  
Jeong-Woo Lim ◽  
Hanyoung Bu ◽  
Younghoon Cho
Keyword(s):  
Dead Time ◽  
Compensation Voltage ◽  
Voltage Source ◽  
Current Phase ◽  
Phase Voltage ◽  
Compensation Strategy ◽  
High Modulation ◽  
Voltage Controller ◽  
Three Phase ◽  
Dead Time Compensation

This paper proposes a novel three-phase voltage source inverter dead-time compensation strategy for accurate compensation in wide current regions of the inverter. In particular, an analysis of the output voltage distortion of the inverter, which appears as parasitic components of the switches, was conducted for proper voltage compensation in the low current region, and an on-line compensation voltage controller was proposed. Additionally, a new trapezoidal compensation voltage implementation method using the current phase was proposed to simplify realizing the trapezoidal shape of the three-phase compensation voltages. Finally, when the proposed dead-time compensation strategy was applied, the maximum phase voltage magnitude in the linear modulation voltage regions was defined to achieve smooth operation even at high modulation index. Simulations and experiments were conducted to verify the performance of the proposed dead-time compensation scheme.

A Design of Current Loop for Motors Control System Based on SVPWM

2013 ◽  
Vol 433-435 ◽  
pp. 1141-1144
Author(s):  
Quan Li Han ◽  
Xi Wang
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Dead Time ◽  
Motor Drive ◽  
Current Loop ◽  
Servo Motor ◽  
Current Sampling ◽  
Software And Hardware ◽  
The Dead ◽  
Dead Time Compensation

This paper introduces the SVPWM mechanism firstly and the software and hardware scheme of current loop in servo motor is designed; it also contains the control strategy and the current sampling principle. The dead time compensation problem in the inverter of the motor drive is discussed deeply. In the end, the software realization method of the interruption of current loop is presented in details.

scholarly journals Independent Upper- and Lower-Arm Switching Scheme Based on Reference Current Polarity for Three-Level NPC Inverters

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5535
Author(s):  
Kangsoon Ahn ◽  
Yongseung Oh ◽  
Wonseok Oh ◽  
Kyumin Cho
Keyword(s):  
Dead Time ◽  
Operation Mode ◽  
Current Control ◽  
Neutral Point ◽  
Mode Analysis ◽  
Switching Scheme ◽  
Grid Connected Inverter ◽  
Dead Time Compensation ◽  
Current Polarity ◽  
Switching Method

This study presents a novel switching scheme for three-level neutral point clamped (NPC) inverters. The proposed switching method independently drives the upper- and lower-arm elements of the inverter based on the polarity information of the reference current. The proposed switching scheme does not require the inclusion of dead-time for each switching, except when the current polarity changes. Therefore, unlike the conventional inverter switching method, dead-time compensation is not needed, and the possibility of an arm-short accident is prevented. In this study, a switching procedure is detailed, and the operation mode analysis of the proposed switching scheme is presented. The effectiveness of the proposed switching method is verified experimentally by application to a grid-connected inverter that requires inverter current control.

scholarly journals Model Predictive Current Control with Fixed Switching Frequency and Dead-Time Compensation for Single-Phase PWM Rectifier

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 426 ◽  
Author(s):  
Longyun Kang ◽  
Jianbin Zhang ◽  
Hailan Zhou ◽  
Zixian Zhao ◽  
Xinwei Duan
Keyword(s):  
Single Phase ◽  
Dead Time ◽  
Prediction Equation ◽  
Current Control ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
Action Time ◽  
Optimal Action ◽  
The Dead ◽  
Dead Time Compensation

The research object of this paper is single-phase PWM rectifier, the purpose is to reduce the total harmonic distortion (THD) of the grid-side current. A model predictive current control (MPCC) with fixed switching frequency and dead-time compensation is proposed. First, a combination of an effective vector and two zero vectors is used to fix the switching frequency, and a current prediction equation based on the effective vector’s optimal action time is derived. The optimal action time is resolved from the cost function. Furthermore, in order to perfect the established prediction model and suppress the current waveform distortion as a consequence of the dead-time effect, the dead-time’s influence on the switching vector’s action time is analyzed, and the current prediction equation is revised. According to the experimental results, the conclusion is that, firstly, compared with finite-control-set model predictive control, proportional-integral-based instantaneous current control (PI-ICC) scheme and model predictive direct power control (MP-DPC), the proposed MPCC has the lowest current THD. In addition, the proposed MPCC has a shorter execution time than MP-DPC and has fewer adjusted parameters than PI-ICC. In addition, the dead-time compensation scheme successfully suppresses the zero-current clamping effects, and reduce the current THD.

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