5
3.2
Explanation multicycle control SP (burst-firing control)
In this operating mode the thyristor controller ensures the targeted switching of individual full waves of
the power supply. Depending on the control signal individual halfwaves (positive half-waves, negative
half-waves) and wave packets can be switched, in which the switching point is always at the sinus zero
crossing. The impulse(T )-pause(T
)-ratio controls the electrical power. This kind of operation mode
AN
AUS
reduces system perturbation. As basis for the switching intervals (impulse-pause-ratio) the devices
normally operate with a time base T of one second (1s corresponds to 50 full-waves). Possible
application ares are electric heatings, heat technology, and drying technology. Newer models offer
combinations of phase angle control and multicycle control SP as well as different adjustment options
in relating to the implulse (T )-pause(T
)-ratio.
AN
AUS
For example:
A control signal of Ust = 5V with a control range of 0 to 10V creates a impulse duration T of 25 full-
AN
waves (500 ms) and a pause duration T
of 25 full-waves (500ms).
AUS
T
AN
T
AUS
T
t
U
LAST
Thermokon Sensortechnik GmbH - Thyristor controller TS1 3Ph, TS1 SP 3Ph
P
U
I
U V
V
st
=
×
×
max
max
[ ]
10
I
I
U V
V
st
=
×
max
[ ]
10
U
U
U V
V
st
=
×
max
[ ]
10
U
max
I
max
P
max
U, I, P
(normalized to maximum values)
Voltage U, current I, active power P
multicycle control
Voltage U, current I (normalized)
Active power P (normalized)