Single Phase Dual Converter

Single Phase Dual Converter

Tags: Single Phase Dual Converter, Dual Converter, Forward and reverse running of DC motor using Dual Converter, Circuit Diagram for Single phase Dual Converter, Dual converter with Circulating current mode, Dual converter without circulating current mode,,
Overall rating
single-phase-dual-converter
Aim

To construct a single phase dual converter in with and without circulating current mode Operation.


Apparatus required

  • Single Phase Dual Converter kit
  • Patch chords
  • Power chord
  • DC motor or Resistive Load
  • CRO
 

Circuit Diagram



circuit-diagram-of-single-phase-dual-converter


Mimic Diagram



single-phase-dual-converter-power-electronics

Procedure

  • Connections are made as shown in circuit diagram.
  • First turn on SW2 (triggering pulse supply).
  • Select the position either in With or Without Circulation mode.
    Note: If it is With Circulation Mode then Inductor must be connected.
  • Verify pulse across test points.
  • Turn on SW1 (input power supply).
  • By varying α ,Observe corresponding Output voltage at load terminal
  • To verify the motor speed and direction.

Output Waveform

Without Circuating Current Mode

Positive Converter




output-waveform-for-single-phase-dual-converter


Negative Converter



negative-converter-for-single-phase-dual-convertor


Tabulation

Without Circulating Mode:

S.No

P-Converter

N-Converter

Firing Angle (Deg)

Measured

(V)

Calculated

(V)

Firing Angle

(Deg)

Measured

(V)

Calculated

(V)

1.

2.

3.

36

90

126

18.5

10

5

19.54

10.80

4.45

36

90

126

-18

-11

-5

-19.54

-10.80

-4.45

 
With Circulating Mode:

S.No

P-Converter

(deg)

N-Converter

(deg)

Total

(deg)

Measured Voltage (Volts)

1.

2.

3.

4.

5.

 

36

60

90

120

144

144

120

90

60

36

180

180

180

180

180

 

 

1. Total Time Period

T = 2x(ontime + offtime)

if F = 50Hz

T = 20ms

360degree=20ms

1ms=360/20
=18 degree

0.1ms =1.8degree

when off time is 4ms

alpha α = (4/0.1)*1.8

= 72degree


2. The Average Output Voltage

The dc output voltage Vdc can be varied from a maximum value of 2Vmfor α=0° to a minimum value of -2Vm for α = π radians = 180°




average-formula-for-single-phase-dual


Where,


V= input ac voltage in volt.


α = firing angle in degree


if, Vm=√2*24V,



formula-for-single-phase-dual-convertor--

Result

Above experiment for Single Phase Dual Converter was done and the result was verified.

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