Psim commande thyristor pdf

Thyristor converters university of nevada, las vegas. There are numerous variations, including gateturn off gto devices that can be turned on or off by the action of the gate, agt anode gate thyristor devices that have a gate going to the internal ntype layer near the anode instead of the ptype layer near the cathode, photoelectric thyristors. Ep76843a2 commande dun thyristor dun pont redresseur. Tcr is controlled with proper firing angle input to operate in a continuous manner, while tsr is controlled without firing angle control which results in a step change in reactance. Available in 9 standard configurations, all devices offer full pressure contact construction for maximum reliability and performance at rated current. Matlab simulation of singlephase scr controller for single phase induction motor. Thyristor switched reactor tsr both are composed of a shuntconnected reactor controlled by two parallel, reverseconnected thyristors.

New hev design suite lithiumion model mtpa, field weakening, and other control blocks for motor drives and hev space vector pwm block. The following examples illustrate the control of a thyristor switch. The pnpn structure of a thyristor is matched by the pnp and npn structures of the bipolar transistors, the base of each device being connected to the collector of the other device. Hi everyone, im trying to use psim to model an automatic speedvoltage regulator control for an engine generator and experimenting with basic topologies. Power electronics, diac, triac and thyristor applications. Synchronous generator alternator stator voltage control. Pdf simulation of thyristor operated induction generator. Similar procedures can be used to derive comparable expressions for the crowbar diode in this circuit, or for devices in other circuit configurations. Adegboyega department of electrical and electronic engineering, the federal university of technology, akure, nigeria. Somewhat simplified, thats the crux of how a thyristor works. Simulation can also be launched with the command line option by running. Download pspice for free and get all the cadence pspice models.

Fourlayer devices act as either open or closed switches. It describes in detail the characteristics and operating principles of power semiconductor devices diodes, scr, triac. It consists of a power capacitor connected in series with a bidirectional thyristor valve and, usually, a current limiting reactor. The thyristor switched capacitor is an important component of a static var compensator svc, where it is often. Psim is indicated for systemlevel simulation, control loop design and motor drive system studies. The thyristor s operating characteristic is shown in fig. During the positive halfcycle of the sinusoidal waveform, the device is forward biased but with switch s 1 open, zero gate current is applied to the thyristor and it remains. Psim is a simulation package specifically designed for power electronics and control circuits. Type simulink on matlab command window selecting new file file new model selecting source libraries simpowersystems electrical sources selecting thyristor. Six step voltage source inverter part iii psim simulation. Multimeter1 is used for measuring voltages across all the 6 thyristors.

The above thyristor firing circuit is similar in design to the dc scr circuit except for the omission of an additional off switch and the inclusion of diode d 1 which prevents reverse bias being applied to the gate. Command line options for orcad applications xx command files xx creating and editing command files xx log files xxi editing log files xxii simulation command line specification format xxiii simulation command line options xxiv specifying simulation command line options xxv commands command reference for pspice and pspice ad 28. To ensure that this circuit behaves like a thyristor, it is necessary to pick suitable parameter values of the npn and pnp devices, plus external resistors. A basic tutorial on computer simulation of phase controlled rectifiers using psim. This manual covers both psim and all the addon modules except simcoder module. Diac, triac and thyristor applications related subjects. The wt signal is an angle varying between 0 and 2pi radians, synchronized on zero crossings of the fundamental positivesequence of phase a of the primary voltage of the converter transformer. The paper presents simulation results about thyristor operation of a mains connected induction machine, both as a motor and as a generator. Switching from the off state to the on state is normally initiated by a control signal. The source inductance l s is neglected for simplicity. Triac arrays, phase control, circuit to determine thyristor state, pulse transformer, acac and acdc pwm converters with gto, driver circuits and gto discrete model. Characteristics of thyristors this application note presents the basic fundamentals of scr, triac, sidac, and diac thyristors so the user understands how they differ in characteristics and parameters from their. Turnon a thyristor is turned on by making its gate.

A thyristor switched capacitor tsc is a type of equipment used for compensating reactive power in electrical power systems. It allows fast simulation and it has a friendly user interface. Some thyristors and their symbols are a 4layer diode b scr c diac d triac e scs. Choose open from the file menu to load the file chop. Redressement double alternance avec filtrage sous psim. The single phase fully controlled convertor using four thyristors t 1, t 2, t 3, t 4. The power flow is bidirectional between the ac and the dc side.

A thyristor is a controlled rectifier where the unidirectional current flow from anode a to cathode k is initiated by a small signal current from gate g to cathode. A thyristor is turned on by making its gate positive with respect to its cathode. Psim emulator of the powerpc architecture using psim. This video lecture contains psim simulation that was done for the six step inverter and you may get some ideas for gate pulse supplying procedure as well as. Thyristor a thyristor is a controlled rectifier where the unidirectional current flow from anode to cathode is initiated by a small signal current from gate to cathode. Matlab simulation of singlephase scr controller for. The pulse generator thyristor block is controlled by the alpha angle reference signal and by the synchronization signal wt. Thyristor controlled reactor for power factor improvement. The circuit operation depends on the state of the ac source and the firing angle. The gate node of a thyristor or triac must be connected to either a gating. Turnon of the thyristor occurs when the capacitor is charged through the resistor from a voltage or current. The name of thyristor is derived from the greek word meaning a door.

The results were obtained by three different simulation. Psim user manual file extensions used in psim are. A thyristor is a bistable semiconductor device that comprises three or more junctions and can be switched from the off state to the on state or vice versa. I have several questions regarding my workflow which i dont know if its right. This manual covers both psim and all addon modules and subjects except the. Three phase fully and half controlled bridge rectifier 10 procedure. During the positive half cycle of the supply voltage, the thyristors t 1 and t 2 are in the forward biased condition and the thyristors t 3 and t 4 are in the reverse biased condition. The command target sim accepts the same options as can be specified on the psim command line. Ac to dc conversion rectifier ac to dc conversion rectifier, pdf file. Thyristors thyristors are a class of semiconductor devices characterized by 4layers of alternating p and n material. Three phase fully contolled bridge rectifier 6 thyristors change the firing angle using 6pulse generator. A singlephase thyristor rectifier converts an ac voltage to a dc voltage at the output. Telechargez comme pdf, txt ou lisez en ligne sur scribd. Simulation can also be launched with the command line option by running the.