S2006FS221V Teccor Electronics, Inc., S2006FS221V Datasheet - Page 137

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

Application Notes
Figure AN1003.13
Several speed control and light dimming (phase) control circuits
have been presented that give details for a complete 120 V appli-
cation circuit but none for 240 V. Figure AN1003.14 and Figure
AN1003.15 show some standard phase control circuits for 240 V,
60 Hz/50 Hz operation along with 120 V values for comparison.
Even though there is very little difference, there are a few key
things that must be remembered. First, capacitors and triacs con-
nected across the 240 V line must be rated at 400 V. Secondly,
the potentiometer (variable resistor) value must change consider-
ably to obtain the proper timing or triggering for 180° in each half-
cycle.
Figure AN1003.14 shows a simple single-time-constant light dim-
mer (phase control) circuit, giving values for both 120 V and
240 V operation.
©2002 Teccor Electronics
Thyristor Product Catalog
(60 Hz)
120 V
Load
R 1 , R 2 = 2.2 k, 2 W
R 3 = 2.2 k, 1/2 W
R 4 = Thermistor, approx. 5 k
R 5 = 10 k Potentiometer
R 6 = 5 M Potentiometer
R 7 = 100 k, 1/2 W
R 8 = 1 k, 1/2 W
R 1
UJT Triggering Level
UJT Emitter Voltage
at operating temperature
D 1
D 3
Precision Proportional Temperature Control
D 2
D 4
Pedestal
R 2
D 5
Cool
Hot
Temp
R 4
R 3
R 5
T
0
Q 1 = 2N2646
Q 2 = Q2010L5
T 1 = Dale PT 10-101
D 1-4 = 200 V Diode
D 5 = 20 V Zener
D 6 = 100 V Diode
C 1 = 0.1 F, 30 V
Ramp
D 6
or equivalent
R 6
R 7
Time
C 1
"Gain"
T 1
Q 1
R 8
Q 2
Triac
AN1003 - 5
Figure AN1003.14
The circuit shown in Figure AN1003.15 is a double-time-constant
circuit which has improved performance compared to the circuit
shown in Figure AN1003.14. This circuit uses an additional RC
network to extend the phase angle so that the triac can be trig-
gered at small conduction angles. The additional RC network
also minimizes any hysteresis effect explained and illustrated in
Figure AN1003.10 and
Figure AN1003.15
Note: L 1 and C 1 form an
RFI filter that may be eliminated
Note: L 1 and C 1 form an
RFI filter that may be eliminated
120 V ac
240 V ac
240 V ac
Voltage
60 Hz
50 Hz
60 Hz
120 V ac
240 V ac
Voltage
AC
Input
Input
50/60 Hz
AC
60 Hz
Input
AC
AC
Input
Load
Load
C 1
C 1
Current
Current
Load
8 A
6 A
6 A
AC
Load
12 A
Single-time-constant Circuit for Incandescent Light
Dimming, Heat Control, and Motor Speed Control
Double-time-constant Circuit for Incandescent Light
Dimming, Heat Control, and Motor Speed Control
3 A
AC
R 2
C 2
L 1
L 1
Figure AN1003.11.
250 k
500 k
500 k
C 2
R 1
R 2
250 k
500 k
R 1
R 1
0.1 µF
100 V
3.3 k
1/2 W
R 2
3.3 k
15 k
0.1 µF
100 V
0.1 µF 200 V
0.1 µF 400 V
0.1 µF 400 V
R 3
0.1 µF 200 V
0.1 µF 400 V
C 3
C 1 , C 2 , C 4
C 1 , C 3
D 1
HT-32
D 1
* dv/dt snubber network
HT-32
when required
* dv/dt snubber network
when required
100 µH
200 µH
100 µH
200 µH
200 µH
http://www.teccor.com
L 1
L 1
Q 1
[phone]
Q 1
Q2010L5
Q4008L4
Q4008L4
Q2015L9
Q4004L4
Q 1
Q 1
R 3 *
100
C 3 *
AN1003
R 4 *
100
C 4 *