control circuits for power electronics

... mathematical model for the VCS with electromagnetic drive and power converter control circuits for its optimal control DESPOTOVIC ´ AND STOJILJKOVIC ´ : POWER CONVERTER CONTROL CIRCUITS FOR 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 control circuits from power ... various types of power converters for electromagnetic vibratory drive. V. S IMULATION R ESULTS In this section, simulation results for cases of phase angle control and switch-mode current control are...

Ngày tải lên: 03/01/2014, 19:16

Ngày tải lên: 16/03/2014, 11:20

Ngày tải lên: 23/03/2014, 08:21

... 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...

Ngày tải lên: 27/10/2013, 16:15

... the supply transformer. Practical FIGURE 1.29 Various topologies of phase-controlled three-phase ac voltage controllers: (a) half-controlled, before-load, (b) delta-connected, before-load, (c) ... voltage controller. FIGURE 1.27 Waveform of the output voltage in a fully controlled three-phase ac voltage controller (resistive load, firing angle of 30  ). 1.3 AC TO AC CONVERTERS 19 CONTROL IN POWER ELECTRONICS Selected ... this angle. For example, for load and firing angles both of 30  , the load EMF FIGURE 1.5 PWM control of output voltage in the generic power converter operating as an ac voltage controller: (a) input...

Ngày tải lên: 16/03/2014, 08:20

Ngày tải lên: 14/05/2014, 21:44

Ngày tải lên: 28/06/2014, 22:20

Ngày tải lên: 05/09/2013, 10:15

Ngày tải lên: 05/09/2013, 14:58

Ngày tải lên: 05/09/2013, 15:28

Ngày tải lên: 15/10/2013, 16:24

... distortion for the input and output waveforms, and high power factor (PF) if the source is 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 of dc power supplies is regulated or controllable dc, whereas the output for ac power supplies is ac. The input to these power supplies ... elements in all power conversion applications. The power devices are mainly used as switches to convert power from one form to another. They are used in motor control systems, uninterrupted power supplies,...

Ngày tải lên: 19/10/2013, 11:15

... 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 space ENGNG3070 Power Electronics ... 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...

Ngày tải lên: 27/10/2013, 13:15

... Fig. 29: N2 flow-rate versus actuation voltage for the valve as a func- tion of inlet pressure. ...

Ngày tải lên: 12/12/2013, 11:15

Ngày tải lên: 12/12/2013, 20:34

... Ideal rectifiers) controller schemes average current control, 634-636 current programmed control, 636-640 feedforward, 635-636 hysteretic control, 639-641 nonlinear carrier control, 641-645 modeling ... Fundamentals of Power Electronics R. W. Erickson 13 proximity effect, 476-490 transformer basics, 152-154, 466-471 transformer design, 517-531 Magnetizing current, 152-153, 458-469 Magnetomotive force ... diagrams, 479-482 PWM waveform harmonics, 487-490 simple explanation, 476-478 transformer design procedure, accounting for, 519 winding loss, total, 483-487 Fundamentals of Power Electronics R. W. Erickson 17 inverter...

Ngày tải lên: 13/12/2013, 01:15

... example 18.2. Controller schemes 18.2.1. Average current control 18.2.2. Feedforward 18.2.3. Current programmed control 18.2.4. Hysteretic control 18.2.5. Nonlinear carrier control 18.3. Control system ... of Power Electronics Fundamentals of Power Electronics First Edition R. W. Erickson Power Electronics Group, University of Colorado at Boulder About the second edition A new textbook on power ... into the power area via the "back door". The power electronics field is quite broad, and includes fundamentals in the areas of ● Converter circuits and electronics ● Control systems...

Ngày tải lên: 13/12/2013, 01:15

Ngày tải lên: 25/12/2013, 10:51