ARKEL
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ADrive
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18. HOW TO ADJUST FOR OPEN LOOP PRACTICALLY
To run the device in open loop mode (without encoder) apply the below step by step.
● Read the motor plate and enter these values to the inverter using MOTOR SETUP menu.
● ENABLE AUTO TUNE function and run the elevator in inspection mode. Keep giving
movement command until AUTO TUNE END message is displayed on the inverter display. The
motor current must be entered correctly before auto-tune. (Too high current will cause over
current and heating of motor. Too low current will cause torque loss at low speeds and stopping
sensitivity will decrease).
● Move the elevator in inspection mode and be sure that it is going in the right direction. If the
main controllers’ direction is reverse of the elevators direction change the order by the parameter
2.17-Motor direction.
● Run the elevator with V0 speed and check the motor current if it is higher than nominal motor
current decrease Middle Voltage at V/F table. Ideal balanced current is %75 of motor current.
● Be sure that nominal speed (parameter
2.1-Nominal Speed
) of the elevator and rpm (parameter
2.2-Motor RPM At Nominal Speed
) of the motor are correctly entered.( For example for 0,6
m/sn elevator nominal speed = 0,6 m/sn – nominal rpm = 830 or for 1 m/sn elevator nominal
speed = 1 m/sn – nominal rpm = 1430). Don’t change these parameters to speed up or slow down
the elevator. These parameters are only machine information.
● Enter the speed references at TRAVEL CURVE menu. For applications to speed up the
elevator over the nominal speed, adjust the high speed maximum %30 over the nominal speed.
(For example nominal speed 0,6m/sn – maximum high speed 0,8 m/sn or nominal speed 1 m/sn –
maximum high speed 1,3 m/sn).
Be sure that mechanical safety is suitable for this new higher
speed (Mechanical brakes, safety gears, rails, shaft etc.).
● Enter the slowing distance. Adjust this parameter to a value 10-20 cm less than the distance of
the slowing magnets to floor to achieve a secure distance for elevator to slow down and approach
to floor at low speed.( For example if the magnet distance is 170cm, enter the slowing distance
155 cm). If the elevator slows down early and then travels at low speed too much, increase
slowing distance parameter. On the contrary if the elevator is late to slow down and passes the
floor level decrease the slowing distance parameter.
● Enter the stopping magnets distance from exact floor level to stopping distance parameter (Ex.
7cm). This distance must be neither too much nor too little. For example a value of 1cm is not a
realistic value. Because the stoppings will be unstable since it is out of motor power limits to stop
an elevator which goes at low speed in 1 cm. For a long distance like 30 cm the stopping
accuracy will be missed with full and empty car.
Example:
Imot:
16.0 A
V3: 1.0 m/s
X_Slw: 165 Cm
Vmot:
380 Volt
V0: 0.13 m/s
X_Stp: 8 Cm
Rpm_nom:
1450
Summary of Contents for ADrive VVVF
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