In this paper, a variable structure PID controller with good convergence rate and robustness for satellite attitude is proposed. order to improve the system rate, proportional differential term was designed, an angular velocity curve better achieved by structure. addition, integral partitioning algorithm disturbance torque improved; meanwhile, negative effect of avoided during converging proces...

the cúk converter, which has voltage buck and boost ability, offers high flexibility as an interface device for solar panels. in addition, current ripple can be more reduced because of two input and output inductors at both sides. this paper presents a new application of current-variable inductors in a cúk converter that reduces the size and capacity of storage elements. because of two inductor...

This paper focuses on hybrid H-bridge cascaded MLI using two equal dc sources in order to produce a five-level output. The proposed topology reduces the number of dc sources and switching elements. This paper emphasis on various inverted sine carrier PWM (ISCPWM) techniques with equal amplitude and unequal amplitude carriers. The inverted sine carrier pulse width modulation (ISCPWM) technique e...

Asymmetrical structure is used to reduce the number of bridges and gate drive circuits and DC sources. This structure therefore provides the capability to produce higher voltages at higher speeds with low switching frequency which has inherent low switching losses and high converter efficiency. Newton Raphson (N-R) algorithm is investigated for the selective harmonic elimination (SHE) to calcul...

A large dynamic-range Variable Gain Amplifier (VGA) suitable for Ultra Wide Band (UWB) applications is presented. The VGA is composed of three programmable variable gain amplifier stages followed by an output buffer. Such wide bandwidth allows our proposed VGA to be used in multi-standard protocols. Power reduction is developed for the variable gain amplifier stages. Thorough analyses of the mi...

This paper proposes a low complexity control scheme for voltage of dynamic restorer (DVR) in three-phase system. The employs the fractional order, proportional-integral-derivative (FOPID) controller to improve on DVR performance order enhance power quality terms response time, steady-state error and total harmonic distortion (THD). result obtained was compared with proportional-integral (FOPI),...

The power <span>electronic component has been widely used in the current industrial era. It considered more efficient than previous devices as it saves space and uses less power. One example of electronic components is variable speed drive for regulation electric motors world. Another application to be energy-saving lamps. use these two loads generates harmonic distortion reduces network ...