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AC08FSM Datasheet(PDF) 134 Page - Teccor Electronics

Part # AC08FSM
Description  Thyristor Product Catalog
PDF  223 Pages
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Manufacturer  TECCOR [Teccor Electronics]
Direct Link  http://www.littelfuse.com/
Logo TECCOR - Teccor Electronics

AC08FSM Datasheet(HTML) 134 Page - Teccor Electronics

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AN1003
Application Notes
http://www.teccor.com
AN1003 - 2
©2002 Teccor Electronics
+1 972-580-7777
Thyristor Product Catalog
Figure AN1003.3
Half-Wave Phase Control (Sinusoidal)
Figure AN1003.4
Symmetrical Full-Wave Phase Control (Sinusoidal)
Figure AN1003.3 and Figure AN1003.4 also show the relative
power curve for constant impedance loads such as heaters.
Because the relative impedance of incandescent lamps and
motors change with applied voltage, they do not follow this curve
precisely. To use the curves, find the full-wave rated power of the
load, and then multiply by the ratio associated with the specific
phase angle. Thus, a 180° conduction angle in a half-wave circuit
provides 0.5 x full-wave conduction power.
In a full-wave circuit, a conduction angle of 150° provides 97%
full power while a conduction angle of 30° provides only 3% of full
power control. Therefore, it is usually pointless to obtain conduc-
tion angles less than 30° or greater than 150°.
Figure AN1003.5 and Figure AN1003.6 give convenient direct
output voltage readings for 115 V/230 V input voltage. These
curves also apply to current in a resistive circuit.
Figure AN1003.5
Output Voltage of Half-wave Phase
Figure AN1003.6
Output Voltage of Full-wave Phase Control
Peak Voltage
RMS
AVG
Power
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20
40
60
80
100 120 140 160 180
Conduction Angle (
θ)
HALF WAVE
θ
Peak Voltage
RMS
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20
40
60
80
100 120 140 160 180
Conduction Angle (
θ)
FULL WAVE
Power
AVG
θ
θ
Peak Voltage
180
160
140
120
100
80
60
40
20
0
0
20
40
60
80
100 120 140 160 180
Conduction Angle (
θ)
RMS
AVG
360
320
280
240
200
160
120
80
40
0
Input
Voltage
230 V 115 V
HALF WAVE
θ
Peak Voltage
RMS
0
20
40
60
80
100 120 140 160 180
Conduction Angle (
θ)
AVG
360
320
280
240
200
160
120
80
40
0
Input
Voltage
230 V 115 V
180
160
140
120
100
80
60
40
20
0
FULL WAVE
θ
θ



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