S2006FS221V Teccor Electronics, Inc., S2006FS221V Datasheet - Page 134

• Manufacturer Part Number: S2006FS221V
• Description: Thyristor Product Catalog
• Manufacturer: Teccor Electronics, Inc.

AN1003
Figure AN1003.3
Figure AN1003.4
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
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1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0
20
20
Half-Wave Phase Control (Sinusoidal)
Symmetrical Full-Wave Phase Control (Sinusoidal)
HALF WAVE
FULL WAVE
Peak Voltage
Peak Voltage
40
40
Power
Conduction Angle ( )
Conduction Angle ( )
Power
60
60
RMS
80
80
100 120 140 160 180
100 120 140 160 180
RMS
AVG
AVG
AN1003 - 2
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
Figure AN1003.6
230 V 115 V
230 V 115 V
360
320
280
240
200
160
120
360
320
280
240
200
160
120
Voltage
Voltage
80
40
80
40
Input
Input
0
0
180
160
140
120
100
180
160
140
120
100
80
60
40
20
80
60
40
20
0
0
0
0
Output Voltage of Half-wave Phase
Output Voltage of Full-wave Phase Control
20
20
HALF WAVE
FULL WAVE
40
40
Conduction Angle ( )
60
60
Conduction Angle (
RMS
RMS
80
80
Peak Voltage
Peak Voltage
100 120 140 160 180
100 120 140 160 180
©2002 Teccor Electronics
Thyristor Product Catalog
AVG
AVG
.
Application Notes