Results 31 to 40 of about 17,177,900 (326)
Speed control with low armature loss for very small sensorless brushed DC motors [PDF]
, 2009 A method for speed control of brushed dc motors is presented. It is particularly applicable to motors with armatures of less than 1 cm3. Motors with very small armatures are difficult to control using the usual pulsewidth-modulation (PWM) approach and ...
McLeish, J. +2 more
core +2 more sources
Torque Ripple Reduction for Switched Reluctance Motor with Optimized PWM Control Strategy
Energies, 2018 The high current ripple and torque ripple are the main drawbacks of the switched reluctance motor (SRM) since the nonlinearity and double saliency, which limits its applications. In order to eliminate the current variation and torque ripple, an optimized
H. Cai +5 more
semanticscholar +1 more source
Digital control of dual-load LCLC resonant converters [PDF]
, 2005 The paper proposes the analysis, design and realisation of dual-output resonant LCLC converters with independent output regulation, employing a single power stage and combined PWM and frequency control.
Ang, Y A +3 more
core +1 more source
Nihon Kikai Gakkai ronbunshu, 2019 The energy efficiency of the conventional flow control of hydraulic systems using the pressure loss of throttle valves, which are widely used in construction machinery, is very low.
Satoshi MAEKAWA +3 more
doaj +1 more source
Self-precharge in single-leg flying capacitor converters [PDF]
, 2009 Flying Capacitor (FC) multilevel pulse width modulated (PWM) converters are an attractive choice due to the natural voltage balance property. During start-up of the converter, care has to be taken that the power switches are not exposed to voltage ...
Melkebeek, Jan +2 more
core +2 more sources
A Low-Cost and Compact High-Frequency Gallium Nitride Gradient Power Amplifier for Low-Field MRI. [PDF]
Magn Reson MedABSTRACT Purpose To reduce the upfront cost of small, low‐field MRI systems, while expanding the capabilities of their gradient systems. Methods A gradient power amplifier was designed to leverage the lowering cost of Gallium Nitride (GaN) power transistors and high speed logic, to achieve high efficiency and responsiveness for driving gradient coils ...
Bolding NR +7 more
europepmc +2 more sources
Analysis and mitigation of dead time harmonics in the single-phase full-bridge PWM converters with repetitive controllers [PDF]
, 2018 In order to prevent the power switching devices (e.g., the Insulated-Gate-Bipolar-Transistor, IGBT) from shoot through in voltage source converters during a switching period, the dead time is added either in the hardware driver circuits of the IGBTs or ...
Blaabjerg, Frede +3 more
core +3 more sources
A PWM current source-based DC transmission system for multiple wind turbine interfacing [PDF]
, 2014 A pulsewidth modulation (PWM) current source wind energy conversion system based on a parallel configuration for high voltage direct current application is proposed.
Ahmed, Khaled Hani +2 more
core +1 more source
南方能源建设[Objective] With the continuous expansion of the use of DC microgrids in distribution networks, high-power three-phase pulse width modulation (PWM) rectifiers are becoming increasingly important.
Juzhong WANG +6 more
doaj +1 more source
IET Electric Power Applications, 2023 For high‐power converters, the low switching frequency (SF) modulation represented by selective harmonic elimination pulse width modulation (SHE‐PWM) is crucial to reduce the switching loss and enhance the efficiency with a good steady‐state performance.
Bo Guan, Xuyang Yan
doaj +1 more source