Modelling and analysis of a high-performance Class D audio amplifier using unipolar pulse-width-modulation

2012 ◽  
Vol 99 (2) ◽  
pp. 163-177 ◽  
Author(s):  
Zekun Zhou ◽  
Yue Shi ◽  
Xin Ming ◽  
Bo Zhang ◽  
Zhaoji Li ◽  
...  
Keyword(s):  
Pulse Width ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Audio Amplifier ◽  
Class D ◽  
Unipolar Pulse

Design of a Sawtooth Generator Applied for Class-D Audio Power Amplifier

2012 ◽  
Vol 241-244 ◽  
pp. 693-697
Author(s):  
Zi Yi Liu ◽  
Xing Xing Jing ◽  
Wen Xi
Keyword(s):  
Circuit Design ◽  
Power Amplifier ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Regulator ◽  
Core Component ◽  
Audio Amplifier ◽  
Class D ◽  
Simulation Results ◽  
Sawtooth Generator

A systematic introduction to principles and advantages of the class-D audio amplifier based on pulse width modulation (PWM) are presented in this paper. The traditional sawtooth generator needs voltage-regulator tube to server as a core component. Against to such a disadvantage a simple way based on the charging and discharging capacitance is proposed to achieve sawtooth generator. The circuit design is based on SIMC 0.18um process. Spectre simulation results show that the sawtooth generator's performance is good. And it suits for the design of class-D audio power amplifier chip.

scholarly journals Experimental verification of trinary DC source cascaded H-bridge multilevel inverter using unipolar pulse width modulation

Automatika ◽  
2019 ◽  
Vol 60 (1) ◽  
pp. 19-27 ◽  
Author(s):  
G. Irusapparajan ◽  
D. Periyaazhagar ◽  
N. Prabaharan ◽  
A. Rini ann Jerin
Keyword(s):  
Experimental Verification ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Unipolar Pulse

Simulation Study of SVPWM Control Technology for NPC Inverter

2013 ◽  
Vol 347-350 ◽  
pp. 392-395
Author(s):  
Song Li
Keyword(s):  
Pulse Width ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Electronic Devices ◽  
Multilevel Inverter ◽  
Control Technology ◽  
Power Electronic ◽  
Structure Characteristics ◽  
The World ◽  
Working Principle

With the development of high voltage technology ,the inverter power is becoming higher and higher . The traditional two-level inverter capacity has been difficult to achieve high power requirements due to the limitation of the power electronic devices. Therefore, different new kinds of multilevel inverter topologies with high-performance are proposed by the scientist all over the world. This paper introduces the topology structure, characteristics and working principle of threelevel inverter, and makes a detailed description of space vector pulse width modulation principle. Finally, the simulation waveforms are presented with Matlab/Simulink, the results verifies the validity of the theoretical analysis.

Synchronized Symmetrical Bus-Clamping PWM Strategies for Three Level Inverter: Applications to Low Switching Frequencies

2011 ◽  
Vol 12 (2) ◽  
Author(s):  
Sreenivasappa Bhupasandra Veeranna ◽  
Udaykumar R Yaragatti ◽  
Abdul R Beig
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Industrial Applications ◽  
Voltage Source ◽  
Switching Frequency ◽  
Space Vector ◽  
Digital Implementation ◽  
Switching Losses

The digital control of three-level voltage source inverter fed high power high performance ac drives has recently become a popular in industrial applications. In order to control such drives, the pulse width modulation algorithm needs to be implemented in the controller. In this paper, synchronized symmetrical bus-clamping pulse width modulation strategies are presented. These strategies have some practical advantages such as reduced average switching frequency, easy digital implementation, reduced switching losses and improved output voltage quality compared to conventional space vector pulse width modulation strategies. The operation of three level inverter in linear region is extended to overmodulation region. The performance is analyzed in terms THD and fundamental output voltage waveforms and is compared with conventional space vector PWM strategies and found that switching losses can be minimized using bus-clamping strategy compared to conventional space vector strategy. The proposed method is implemented using Motorola Power PC 8240 processor and verified on a constant v/f induction motor drive fed from IGBT based inverter.

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