نتایج جستجو برای: pulse width modulation

تعداد نتایج: 289258  

Journal: :IEICE Transactions 2014
Ryo Harada Yukio Mitsuyama Masanori Hashimoto Takao Onoye

This paper presents a measurement circuit structure for capturing SET pulse-width suppressing pulse-width modulation and within-die process variation effects. For mitigating pulse-width modulation while maintaining area efficiency, the proposed circuit uses massively parallelized short inverter chains as a target circuit. Moreover, for each inverter chain on each die, pulse-width calibration is...

Journal: :journal of electrical and computer engineering innovations 2013
p. amiri m. sharafi

this paper presents a novel control method to improve the efficiency of low-voltage dc-dc converters at light loads. pulse width modulation (pwm) converters have poor efficiencies at light loads, while pulse frequency modulation (pfm) control is more efficient for the same cases. switching losses constitute a major portion of the total power loss at light loads. to decrease the switching losses...

Journal: :International Journal of VLSI Design & Communication Systems 2019

Journal: :IOP Conference Series: Materials Science and Engineering 2020

2014
Sandeep Kumar Singh Harish Kumar Kamal Singh Amit Patel

Switching power converters are used in industrial application to convert and deliver their required energy to the motor or lo ad because of advances in solid state power devices and microprocessors. Pulse Width Modulation variable speed drives are increasingly applied in many new industrial applications that require superior performance. The advantages of PWM based switc hing power converter ov...

2013
Hadi Farshbar Murteza Farsadi

Multilevel inverters have become more popular over the years in electric high power application with the promise of less disturbances and the possibility to function at lower switching frequencies than ordinary two-level inverters. Multilevel inverters has been introduced as static high-power inverters for medium to high voltage applications such as large electric drives, reactive power compens...

This paper presents the comparative study of three phase twenty five level diode clamped and cascaded H-bridge multilevel inverters. The comparison is made in respect of requirement of devices, quality of output voltage and reduction of total harmonic distortion at the multilevel inverter terminals. In this work multicarrier sinusoidal pulse modulation control methods of Phase disposition (PD-P...

2010
B. Urmila D. Subbarayudu

The multilevel inverter topology gives the advantages of usage in high power and high voltage application with reduced harmonic distortion without a transformer. This paper presents a comparative study of nine level diode clamped inverter for constant Switching frequency of sinusoidal Pulse width Modulation and sinusoidal Natural Pulse width Modulation with switching frequency Optimal Modulation.

M. Sharafi P. Amiri

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...

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