U210B1 Datasheet, PDF (9/12 Pages) TEMIC Semiconductors – Phase Control Circuit Load Current Feedback Applications

U210B1
Applications
In contrast to simple speed controller, the circuits shown
in figures 15 and 16, react to the load dependent speed
drop in which the magnitude of the load current acts on
the speed compensation.
For this purpose, the load current is measured by shunt
resistor R₈. The voltage drop generates a current at Pin 11
dependent of R₅, which reflects in the specified current at
the output of Pin 12.
Rated impedance of the output current at Pin 12 is repre-
sented through the coupling resistance R₇ and the total
impedance of the set point.
The integrated load current proportional signal at C₃
effects in the same direction on the control input as the set
point i.e., by the increase of load current follows an auto-
matic increase of manipulated set point, so that a
compensation of speed falls.
W W W ^{Compensation arrangement is influenced with resistance}
values i.e. R₅ (= 100 to 5 k ) and R₇ (= 10 k to 150 k )
whereas the higher effect is achieved by increasing the
value of R₇ and decreasing R₅. Influence of compensation
can be increased up to the value where the drive system
(motor) starts to oscillate.
Dimensioning in the applications are with the drill
machine of 700 W power.
L
230 V~
N
R₆
4.7 kW
W^R3
220 k
220 nF _R7
C_{3 22 kW}
C₄
T₁
BC308B
min
W ^R15
10 k
max
M
D₁
1N4004
15 mF
10 V
R₁₀
100 kW
14 13 12 11 10 9
8
18 kRW¹
1.5 W
2R⁵kW
U210B
1
2
3
4
5
6
7
R₄
BTA
470 kW
12–800
R₁₂
100 W
50 mRW⁸
C₁
22 mF
25 V
R₂
220 kW
C₂
10 nF
Figure 15. Speed control with load current compensation
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
9 (12)