... mathematical model for the VCS with electromagneticdrive and power converter controlcircuitsfor its optimal control DESPOTOVIC´AND STOJILJKOVIC´: POWER CONVERTER CONTROLCIRCUITSFOR TWO-MASS ... VII. power stage for driving EVA, synchronization circuit with zero-cross detection, half-wave trigger pulse generator, pulse trans-former for galvanic isolation controlcircuits from power ... various types of power converters for electromagnetic vibratory drive.V. SIMULATIONRESULTSIn this section, simulation results for cases of phase angle control and switch-mode current control are...
... control system parameters. Digital Control of Switching Power Supply - Power Factor Correction Stage Sangsun Kim and Dr. P. Enjeti Power Electronics and Power Quality Laboratory Department ... digital control of SMPS. The Power Electronics & Power Quality Laboratory of Texas A&M University is currently exploring several implementation aspects of digital control of power factor ... standard for the control of switch mode power supply (SMPS) systems has been analog control. Now with the advent of high speed, lower cost digital signal processing (DSP) ICs, digital control...
... the supply transformer. PracticalFIGURE 1.29Various topologies of phase-controlled three-phase ac voltage controllers: (a) half-controlled, before-load,(b) delta-connected, before-load, (c) ... voltage controller.FIGURE 1.27Waveform of the output voltage in a fully controlled three-phase ac voltage controller (resistive load, firingangle of 30).1.3 AC TO AC CONVERTERS19 CONTROL IN POWER ELECTRONICS Selected ... this angle. For example, for load and firing angles both of 30, the load EMFFIGURE 1.5PWM control of output voltage in the generic power converter operating as an ac voltage controller: (a)input...
... distortion for the input and output waveforms, and high power factor (PF) if the sourceis ac voltage. Some special power supplies require controlled direction of power flow.Basically two types of power ... required: dc power supplies and ac power supplies. The output ofdc power supplies is regulated or controllable dc, whereas the output for ac power supplies is ac. The input tothese power supplies ... elements in all power conversion applications. The power devices are mainly used as switches to convert power from one formto another. They are used in motor control systems, uninterrupted power supplies,...
... 240 degrees for the fifth sextant and α - 300 degrees for the sixth sextant.Example:A three phase induction machine is fed from PWM VSI controlled using voltage spaceENGNG3070 PowerElectronics ... W.Leonhard; Control of electric drives, 2nd Edition, Berlin: Springer-Verlag, 1996.[2] J.M.D.Murphy, F.G.Turnbull; Power electronic control of AC motors, Oxford: Pergamon Press, 1988.[3] B.K.Bose; Power ... VSI and a PWM VSI. A six-step VSI is therefore analysed. Power circuit of the VSI and associated voltage wave-forms, valid for six-step operation, are for convenience shown again in Figs. 6.17...
... example18.2. Controller schemes18.2.1. Average current control 18.2.2. Feedforward18.2.3. Current programmed control 18.2.4. Hysteretic control 18.2.5. Nonlinear carrier control 18.3. Control system ... of PowerElectronics Fundamentals of Power Electronics First Edition R. W. Erickson Power Electronics Group, University of Colorado at BoulderAbout the second edition A new textbook on power ... into the power area via the "back door". The powerelectronics field is quite broad, and includes fundamentals in the areas of ● Converter circuits and electronics ● Control systems...
... 240 degrees for the fifth sextant and α - 300 degrees for the sixth sextant.Example:A three phase induction machine is fed from PWM VSI controlled using voltage spaceENGNG3070 PowerElectronics ... W.Leonhard; Control of electric drives, 2nd Edition, Berlin: Springer-Verlag, 1996.[2] J.M.D.Murphy, F.G.Turnbull; Power electronic control of AC motors, Oxford: Pergamon Press, 1988.[3] B.K.Bose; Power ... VSI and a PWM VSI. A six-step VSI is therefore analysed. Power circuit of the VSI and associated voltage wave-forms, valid for six-step operation, are for convenience shown again in Figs. 6.17...
... optimum wind turbines power/ torque versus speed characteristics. Two control loops: inner feed forward current control loop and outer voltage control closed loop are applied for the non-inverting ... unitMPPTLPPTOperatorControllerspeedd Control strategyVSWT Control unitVSWT Electrical unit Fig. 1. Control concept of VSWT with non-inverting buck-boost DC-DC converter. 14th International PowerElectronics ... proposed new control strategy is combination of hybrid MPPT algorithm [4] for the normal operation of the VSWT and Limited Power Point Tracking (LPPT) logic algorithm for the limit power operation...