Results 141 to 150 of about 200,578 (202)
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Pulse Width Modulation’s Impact
2021PWM technologies have multiple impacts on the power electronics converters. First, the switching losses of power electronics devices will be accumulated together with PWM and impact the converter power losses. Second, pulse voltage will cause ripple on the passive components in the output side.
Dong Jiang +4 more
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Pulse-Width Modulated Rectifiers
2001To obtain low ac line current THD, the passive techniques described in the previous chapter rely on low-frequency transformers and/or reactive elements. The large size and weight of these elements are objectionable in many applications. This chapter covers active techniques that employ converters having switching frequencies much greater than the ac ...
Robert W. Erickson, Dragan Maksimović
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Distortionless RF pulse width modulation
The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002., 2003A method is presented to synthesize a switching signal which linearly encodes a complex-modulated RF signal to an RF carrier frequency. The switching distortion associated with this method is limited to high-pass components out of band. Consequently, the switching signal may be filtered after high efficiency amplification to produce the linear RF ...
P. Wagh, P. Midya, P. Rakers
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Pulse width modulated series compensator
IEE Proceedings - Generation, Transmission and Distribution, 2002In recent years, several power electronics based technologies, such as the thyristor controlled series capacitor and the unified power flow controller, have been introduced to provide active control of power flow through transmission lines. They have been prompted by the need to utilise existing lines up to their thermal limits to feed power to an ...
G. Venkataramanan, B.K. Johnson
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2012
Pulse-width modulation (PWM) is the foundation of control in power electronics. Its design affects almost all aspects of converter operation, from steady-state and dynamic control performance to electromagnetic interference (EMI) and thermal design. The basic principle of commonly used PWM methods has been well established and easy to understand.
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Pulse-width modulation (PWM) is the foundation of control in power electronics. Its design affects almost all aspects of converter operation, from steady-state and dynamic control performance to electromagnetic interference (EMI) and thermal design. The basic principle of commonly used PWM methods has been well established and easy to understand.
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Sliding Mode Pulse Width Modulation
2007 American Control Conference, 2007This paper presents sliding mode pulse width modulation (SMPWM) control methodologies for a current- controlled inverter. Discussion begins with circuit analysis, proper references, and design of sliding surfaces. Based on this formulation, two novel approaches adopt sliding mode concept are proposed to make the system tracking selected references ...
Wenguang Yan, Vadim Utkin, Longya Xu
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Principle of Pulse Width Modulation
2021In Chap. 1, the basic concept of pulse width modulation has been introduced briefly. In this chapter, the principle of pulse width modulation will be further discussed. Based on fundamental principle, space vector PWM (SVPWM) and carrier-based PWM (CBPWM) will be presented, respectively, together with the relationship between these two approaches. With
Dong Jiang +4 more
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Digital pulse width modulator architectures
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004This paper presents a survey and classification of architectures for integrated circuit implementation of digital pulse-width modulators (DPWM) targeting digital control of high-frequency switching DC-DC power converters. Previously presented designs are identified as particular cases of the proposed classification.
A. Syed +3 more
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2006
Pulse width modulation is a form of pulse coding where the modulated signal contains a chosen frequency or band of frequencies as the main components plus harmonics of very high order that can be easily filtered. Even though PWM originated in telecommunication systems, it is now very common in power electronic circuits: dc to dc converters, dc to ac ...
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Pulse width modulation is a form of pulse coding where the modulated signal contains a chosen frequency or band of frequencies as the main components plus harmonics of very high order that can be easily filtered. Even though PWM originated in telecommunication systems, it is now very common in power electronic circuits: dc to dc converters, dc to ac ...
openaire +1 more source