SMS TAKEDO-3VF, Руководство пользователя

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ANNEX NXP Release 7.1 dated 19-02-2018
14
7 – USAGE OF A WEIGHT SYSTEM MEASUREMENT
At the brake opening, in a GEARLESS motor system (asynchronous or synchronous motor), the motor has
to quickly reach the maximum torque with a quick current injection, to avoid counter-rotations.
In permanent magnet synchronous motor this current injection can cause noise which can be annoying if the
system is installed in hotels, hospitals, etc.
To avoid the noise, it is necessary to set on the inverter the torque, and therefore the current, necessary for
the motor to stay idle at the brake opening; this is possible only by applying to the system a weighing device
that weights the car load at every start.
Takedo 3VF-NXP is equipped with an analog input able to read the signal transmitted by the weighing
system of the car load so as to optimize the startup torque.
The weighing system can be adjusted through the parameters of the GROUP “G2.11 STARTUP
TORQUE”(see USER MANUAL – Paragraph 7.6.3).
The “STARTUP TORQUE” mode is available for CLOSED LOOP adjustment, both for asynchronous motors
and permanent magnet synchronous motors.
EXAMPLE OF WIRING DIAGRAM
The following wiring example uses the AI2 analog input (terminal 4).
The analog output of the load cell must be connected to the terminals 4 (AI2+) and 5 (AI2-/GND) , making
the jumper setting following the drawing below:
Factory
Settings
CAR LOAD WEIGHT
SYSTEM
Signal
conditioner
(if required)
Note : Wiring in case of lack of brake
control input . In this case terminal 5
(AI2-) have not to be connected together
with terminals 3 and 7.
5 (AI2-/GND)
NXOPTA1
Board
4 (AI2+) Vmax = 10Vdc