Results 161 to 170 of about 103,578 (209)
Some of the next articles are maybe not open access.
Nonlinear Controller Design for PWM–Controlled Converters
PAMM, 2003AbstractThis contribution is concerned with the nonlinear controller design for a certain class of PWM (pulse width modulation) – controlled converter systems. It will be shown that under certain assumptions the SSA (state space averaging) – model of the PWM–controlled converter with the duty ratio as the plant input has a very special mathematical ...
A. Kugi, K. Schlacher
openaire +1 more source
IEEE Micro, 1996
Researchers usually implement fuzzy inference systems in software on digital computers or microprocessors. This approach copes with most problems, however real-time systems often require very short time responses. In this case, a hardware implementation becomes the only solution.
J. Tombs, A.J. Torralba, L.G. Franquelo
openaire +1 more source
Researchers usually implement fuzzy inference systems in software on digital computers or microprocessors. This approach copes with most problems, however real-time systems often require very short time responses. In this case, a hardware implementation becomes the only solution.
J. Tombs, A.J. Torralba, L.G. Franquelo
openaire +1 more source
Analysis of PWM Frequency Control to Improve the Lifetime of PWM Inverter
IEEE Transactions on Industry Applications, 2009Studies have shown that the power cycling Mean Time to Failure (MTTF) of the IGBT bond wire in an adjustable speed drive (ASD) may be very short under some very common conditions. This paper proposes a switching frequency reduction method based on junction temperature variation (ΔTj) of the inverter IGBT. It has the following advantages.
null Lixiang Wei +2 more
openaire +1 more source
Control Strategies for PWM Drives
IEEE Transactions on Industry Applications, 1980The majority of pulsewidth modulation (PWM) drives operate in three distinct modes: pure PWM at the lower speeds, pure six-step at the higher speeds, and quasi-PWM at the intermediate speeds. The pure PWM stage can be operated with a constant frequency, unsynchronized carrier.
Trevor L. Grant, Thomas H. Barton
openaire +1 more source
Modified hysteresis controlled PWM rectifier
IEE Proceedings - Electric Power Applications, 2003A modified hysteresis current controller for the control of a PWM rectifier is presented. Mathematical modelling and control of the PWM rectifier is described. Controller parameters are designed in the discrete-time domain. A comparison study between a conventional hysteresis current controller and the modified hysteresis current controller is ...
A.N. Tiwari, P. Agarwal, S.P. Srivastava
openaire +1 more source
Software controller for PWM converters
Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94, 2002A software controller is realized for DC-DC switching power converters. The software is capable of implementing several real-time control schemes such as the continuous/discrete switching frequency control, continuous/discrete pulse-width control and phase control of PWM converters.
J.P. Agrawal, O. Farook, C.R. Sekhar
openaire +1 more source
Error amplifier for PWM controller
2011 International Conference on Electrical and Control Engineering, 2011The error amplifier for PWM controller is designed. The amplifier has high open loop gain and power supply rejection ratio (PSRR). The circuit is simulated by CADENCE Spectre, and layout is done based on the process flow and layout levels of bipolar 45V process provided by HUAYUE Microelectronics Company.
Xiaoyan Wang, Jianping Liu
openaire +1 more source
A Novel Predictive Control For PWM Rectifier
2007 IEEE International Electric Machines & Drives Conference, 2007A novel predictive control for PWM rectifier is proposed in this paper. The algorithm is based on a step-by-step prediction of the converter variables, on the basis of the actual power request and operating conditions. In particular, the control algorithm carries out the converter modulation pattern, in order to achieve a unity power factor at the ...
V. NARDI +3 more
openaire +4 more sources
International Conference on Simulation (1998), 1998
This paper describes a novel approach of a predictive neural current control scheme for a VSI-PWM inverter used in power systems. The new structure is based on a simple state-space observer providing the advantage of a control which is independent of the load type.
openaire +1 more source
This paper describes a novel approach of a predictive neural current control scheme for a VSI-PWM inverter used in power systems. The new structure is based on a simple state-space observer providing the advantage of a control which is independent of the load type.
openaire +1 more source
The charge-controlled PWM switch
PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, 2002The switching mechanism in PWM DC/DC power converters under charge-control is modeled by a three-terminal invariant switching structure called the charge-controlled PWM switch (QC-PWM). An equivalent circuit model of the QC-PWM switch is derived which, owing to its invariance, can be used to obtain the average large-signal and small-signal behavior of ...
openaire +1 more source