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Variateurs de vitesse pour moteurs à courant continu
Speed controllers for DC motors
Carte option mouvement vertical
Optional vertical movement board
J5
J5
VW2-RLD 310
GS
0
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Présentation, montage
Fonction - Montage de l'option
Raccordement de l'option - Schéma fontionnel
Application levage
Fonctionnement de la logique de frein
Exemple
Réglages
Matériel nécéssaire, implantation, réglage fonction logique de frein
Réglage de la fonction I = f(N)
Description, installation
Function, installation of the option board
Option board connection, functional diagram
Hoist application
Operation brake logic
Example
Adjusments
Equipement required, location, brake logic function adjustment
I = f(N) function adjusment
4
5
2
3
6
7
8
9
10
11
12
13
1
8
Description, installation
Function
Installation of the option board
The optional vertical movement board for RECTIVAR 641 variable speed controllers has two functions:
- Braking logic which ensures correct operation of the motor/brake/controller set, particularly during a vertical movement.
- Current limitation versus speed past a predetermined speed threshold, particularly when operating at reduced flux.
Power consumption : + 15 V 13 mA and - 15 V 3 mA.
This board requires a tachogenerator speed feddback.
The board is delivered with a connecting ribbon cable terminated by connectors.
The board is installed on the control board.
TWO CASES MAY BE ENCOUNTERED:
(1) RECTIVAR RTV-641 up to 650 A without the “controlled field” option:
- Remove the standard connector from terminal block J5 on the control board.
J5
- Fit the option board and plug the connectors into J5-1 to J5-30 on the control board indicated below.
(2) RECTIVAR RTV-641 up to 650 A with the “controlled field” option and RECTIVAR 800 up to 3000 A (with built-in controlled field system):
- Remove the connectors from terminal block J5 on the control board from J5-1 to J5-24.
J5
- Fit the option board.
• If the control board is not fitted with a doubleterminal block J5-25 to J5-30, disconnect the mating connector (connection to the controlled field system) and install the adaptor provided as shown in the opposite figure. Plug the connector into the controlled field system, on the left-hand part of the adaptor, then plug the option board connectors into J5-1 to J5-30 as indicated below.
• If the control board has a double terminal block J5-25 to J5-30, plug the option board connectors into J5-1 to J5-30 as indicated below.
REMARK: IF THE I=f(N) FUNCTION IS NOT IN USE, SET THE “THRES” AND “IMAX/SP”
POTENTIOMETERS TO THE ANTICLOCKWISE LIMIT.
Description, installation
Option board connection Without “controlled field” system
48
-
12
11
10
9
16
15
14
13
6
5
8
7
2
1
4
3
25
24
23
22
21
20
19
18
17
30
29
28
27
26
J10
J9
J8
J7
J6
J5
J4
J3-2
J3-1
VW2-RLD310
Control board connector J5
With “controlled field” system
30
29
28
27
26
25
48
-
12
11
10
9
8
16
15
14
13
20
19
18
17
4
3
2
7
6
5
1
25
24
23
22
21
30
29
28
27
26
J10
J9
J8
J7
J6
J5
J4
J3-2
J3-1
VW2-RLD310
Connection if necessary for reduced flux during inoperative periods
Control board connector J5
Functional diagram
Control of relay K1
J3-1
Enable
J3-2
Current limitation reference
Current signal
J2-9
J9
Run command
J5
KM10 auxiliary contact
J8
FLIP-FLOP
TRUTH TABLE
CRA
VA
SRLIM
-
+
SI
0,8 SRLIM
Control board connecting pins
Test points
Connection to control board terminal block J5
&
C
R Q &
ODM
REG
ATT*
AT t1 0
&
&
C
R
0 t2
Q
Q
&
C R Q Q
0 1 0
X 1 0 1
+
CRB
J6
KM10 control
ISI
J7
0V
IHL
J4
R
RZR
J10
0V
Brake current
G3
J2-8
Speed integration inhibition
Latch COMMAND
Ramp reset
Speed amplifier biasing signal
+
Speed signal
J1-3
SP
X
_
0V
THRES
-
-
-
+15V 0V
-15V
-
+ Σ ECL
J2-5
Analog signal for limiting current reduction
ECL
TSP
* BRAKE ASSEMBLY
ATT = 0
9
Hoist application
Operation brake logic The purpose is to ensure that the machine develops a torque in the “up” direction which is capable of holding the load during the transient brake release phase. This is used to check the controller serviceability before the movement is enabled. Also, the control system is held during the transient brake release phase after electrical braking for stoppage.
This operation is illustrated by the timing diagram below which shows normal start and stoppage in the “up” direction.
RUN
FW or RV
ODM
IHL
G3 t3 t2
ECL
SI (current)
Threshold detection (2)
CRB (relay K2)
AT
(brake return)
Brake
(1)
ATT
ISI
(2) t1
RZR
(3)
SP (speed)
(1) Current in the “up” direction regardless the controlled direction with a value adjusted by the “BRAKE CURRENT" potentiometer.
(2) Current detection threshold approximately equal to 0.8 times the current value set in (1).
(3) Zero rpm detection (2 % threshold of rated speed).
t1 : Time delay set by the “REG”potentiometer so that the “ATT” signal is synchronized with the actual brake release.t1 adjustment range : 12 milliseconds to1.5 seconds.
t2 : Time delay latching the controller after actual brake application : 0.85 seconds.
t3 : Safety time delay setting G3 and ECL to zero if the brakeremains applied after
1.7 seconds have elasped.
10
Hoist application
Typical sequence diagram with hoist option:
REMARK:
Make provisions for protective circuits on the brake control coils and the relay and contactor coils.
Q10 KM 10
RC1
RC2
RC3
Y1
Q3
T3
Q1
Q2
F1-F6
F5
A TTA
TTB
Q1
Q4
KA1
KW10
PL PL
AT
FW
RV
K1A
*
K1B
K2A
K2B
Direction 2
Direction 3
P10
E1
OE1
LS
PL
RUN
PL
R
KM1 KA1
On
KA1
KA1 KM1 KM10
* The configuration of relay K1 (K1A, K1B) is as follows :
The relay is energized when the triggers are enabled.
11
Adjustments
Equipment required
Take all precautionary measures to prevent the system from starting with a board out of adjustment as this might result in the fall of the load.
A multimeter with a preferred rating of 20000
Ω
/V.
A potentiometer with an ohmic value ranging from 1 k
Ω
to 10 k
Ω
.
Potentiometers location
J2
J1
Test point
TSP
REG IMAX/SP
THRESHOLD
Test point
ECL
BRAKE
CURRENT
Brake logic function adjustment
Set the “REG” potentiometer to the anticlockwise limit.
Adjust the “BRAKE CURRENT” potentiometer for a current value corresponding to the torque required to hold the rated load during inoperative periods.
12
Adjustments
I = f(N) function adjustment
N
HSP
N1
I1
The adjustment can be performed under static conditions with the controller locked.
(1) Turn the “THRESHOLD” potentiometer anticlockwise.
(2) Apply to test point “TSP” a negative voltage corresponding to the speed level N at which the limitation reduction should be activated, knowing that - 8 V corresponds to the maximum speed of the machine.
Connect a voltmeter across test point “ECL” on the optional board and test point “0 V” on the “Adjustment” card.
Turn the “THRESHOLD” potentiometer clockwise until a slightly negative voltage is read at “ECL”.
Example : 3000rpm motor speed = 8 V (“SP”)
“I = f(N)” cuts in at 1500 rpm (4 V at “SP”). Therefore, apply - 4 V to “TSP”, then turn
“THRESHOLD” clockwise until 0 V -
ε
is read at “ECL”.
“Imax/SP” adjustment : 0 V at “ECL” corresponds to the RECTIVAR limiting current value.
- 10 V at “ECL” corresponds to zero current.
Apply - 8 V (corresponding to “HSP”) to “TSP” and adjust “Imax/SP” for the motor current limiting value I1 for “HSP”.
I max I
Example : If the desired limiting value I1 for - 8 V “TSP” is 0.5 Imax, adjust “Imax/SP” for - 5 V at “ECL”.
Adjustment limits :
The limiting current reduction ratio can be adjusted within limits which depend on the selected speed threshold (see the curve below).
CAUTION :
The use of this function combined with the field cut-off function requires the usual precautionary measures for vertical movements and, in particular, reference validation related to load weighing.
% Speed
100
90
80
70
60
50
40
30
20
10
θ
θ
θ
Imax/SP potentiometer setting
Adjustment by
“Threshold” potentiometer
10 20 30 40 50 60 70 80 90 100
% Imax
θ
max dropping angle for current kimitation (I max/SP turned to the anticlockwise limit).
13
VD0C29B301
99244 Septembre / September 1991
