Cours gradateur monophasé charge inductive PDF

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Cours gradateur monophasé charge inductive en PDF...

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Cours gradateur monophasé charge inductive en PDF ... Single-phased didator

1. Objectives To study the operation and characteristics of a thyristors single-phase dimmer mount on resistive and inductive loads.

2. Introduction In this laboratory, the montages are made using the thyristors contained in a power module. The ignition circuit of the thyristors is carried out using a control module. The simulations are carried out with SimPowerSystems from Simulink. The SimPS is available on the course website.

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3. Gradator on resistive load 4. a) Simulation •

Simulate resistive load mounting using SimPowerSystems. From the simulation results, trace the waveforms of the Vs, Vch and Ich currents voltages for a 60 degrees.

•

Measure the effective value of the Vch

voltage for a 0, 30, 60, 90, 120, 150, 180 degrees. Trace the effective value of the voltage based on the priming angle has.

Vch

Fig 1: Simulation of a dimmer mount on resistive load

a. b) Experience Make the montage of the next figure. Each resistance box will be set to 30?. Plug in the measuring devices to make the requested observations. Use a power analyzer (AVpower)to measure effective values, power and power factor. Fig 2: Completion of the dimmer mount on resistive load

•

Observe the waveforms of the Vs, Vch and Ich currents for a 0, 30, 60 degrees, 90 degrees, 120 degrees, 150 degrees, 180 degrees. Raise these waveforms for the case of a - only 60 degrees, using an attached sheet (to be given to the assistants). Validate this route with your simulation results.

•

For a '0', '30', '60', '90', '120',°:

'150', '180':

- measure the effective value of Vp, Vch, Ip and Ich - measure the active power in the primary of the transformer

- measure the active power in the charge

•

Track the effective value of Vch based on a. Compare to simulation results.

•

Based on the measured values, calculate the power factor of the dimmer mount based on a. Is it still unitary?

•

Based on measured values, calculate the performance of the dimmer mount based on a. Where do the losses

come from?

4. Dying on load R-L 5. a) Simulation Simulate the assembly with an R-L charge using SimPowerSystems. Using the simulation results, trace the waveforms of the Vs, Vch

•

and Ich

current voltages for

a 90 degrees

Determine the priming angle amin (below this value, there is no longer any control over the effective value of Vch).). Is thatit? Note: The theoretical value of amin

is given by the following relationship: amin

- arctan( )

R

•

Measure the effective value of the Vch voltage for a 60, 90 degrees, 120 degrees, 150 degrees, 180 degrees. Trace the effective value of the Vch

voltage based on the priming angle has.

Fig 3: Simulation of a dimmer mount on resistive load

a. b) Experience Make the montage of the next figure. Each resistance box will be set to 30? and each box of inductors, on 160 mH. Plug in the measuring devices to make the requested observations.

Fig 4: Completion of the dimmer mount on R-L load

•

Observe the waveforms of the Vs, Vch and Ich currents for a 0, 30, 60 degrees, 90 degrees, 120 degrees, 150 degrees, 180 degrees. Raise these waveforms for the case of a - only 90 degrees, using an attached sheet (to be given to the assistants). Validate this route with your simulation results.

•

Slowly decrease the angle has from 120 degrees while observing the Vchvoltage. Determine the angle amin. Compare to the theoretical result.

•

For a '60', '90', '120', '150', '180':°:

•

measure the effective value of Vp, Vch, Ip and Ich

•

measure the active power in the transformer's primary

•

measure the active power in the load

•

Track the effective value of Vch based on a. Compare to simulation results.

•

Based on the measured values, calculate the power factor of the dimmer mount based on a.

5. Inducive load dimmer 6. a) Simulation Fig 5: Simulation of a dimmer mount on inductive charge

•

Simulate mounting with an inductive charge using SimPowerSystems. From the simulation results, trace the waveforms of the Vs, Vch

•

and Ich

currents voltages for a 130 degrees. Note: The theoretical value of amin

in this case is:

voltage for a 90, 110, 130, 150, 170 degrees. Trace the effective value of the voltage based on the priming angle has.

Measure the effective value of the Vch

Vch

a. b) Experience Make the montage of the next figure. Each induction box will be set at 160 mH. Plug in the measuring devices to make the requested observations.

•

Observe the waveforms of the Vs, Vch and Ich currents for a 90, 110 degrees, 130 degrees, 150 degrees, 170 degrees. Raise these waveforms for the case of a - only 130 degrees, using an attached sheet (to be given to the assistants). Validate this route with your simulation results.

•

For a '90', '110', '130', '150', '170':°: - measure the effective value of Vp, Vch, Ip and Ich

- measure the active power in the primary of the transformer

•

Track the effective value of Vch based on a. Compare to simulation results.

•

Based on the measured values, calculate the power factor of the dimmer mount based on a.

•

Check that the dimmer mount with a purely inductive load behaves like a variable induction (the value of which is controlled by the priminganglea). Plot depending on a,the actual value of variable induction. ... ... ... ... In this experiment, the operation of a two-thyristor single-phase dimmer is studied in the case of a purely resistive charge, followed by a resistive and inductive load. The various voltage and current waveforms and Vrms according to the priming angle.

output characteristics are noted

Familiarization with the model: The following figure represents the pre-established mount, it is the image of the test model, used to study the single-phase dimmer.

This model contains:

•

The source of sinusoidal tension;

•

The main switch;

•

Two Thyristors, mounted at the head spade, which form the dimmer;

•

The different charges (resistance andinduction);

•

Outflows of signals used by the command.

Data: Power voltage, 24V effective value and f-50Hz frequency

R 500 and 100mH. Work requested: Resistive Charge (R)

1. Raise the Usig-ininputvoltage and the voltage of the power grid, 2. Raise Vref voltage and live voltage, adjust their value until you get intersection points. 3. View trigger voltages separately for each of the thyristors. For two value

of the priming angle - 45 and 90 degrees

1. Identify the indications of the various measuring devices (voltage and current at the load level; 2. Raise the chronograms of these required sizes: •

Charge voltage, charge current(Vc, ic).).

•

Tension at the thyristor terminals, running through the thyristor (VT1, iT1).).

•

Source voltage, voltage at the charging stations (Vs, Vc).)....