Instruction Manual of
-S3 Inverter for Elevator
7.
Application of Elevator
7.1 General
-S3 Inverter is especially designed for elevator drive. It adopts advanced vector
control technology and shows superior speed adjustability. Moreover, due to its specific
design,
-S3 Inverter is very simple to commission and operate, with easy
adjustment to optimal comfort at each stage of elevator operation.
The internal control of
-S3 is shown in Figure 7.1.
A complete electrical control system of elevators contains a control device and a drive, the
former responsible for the starting and stopping sequence control and all automatic
operations (certain control systems may even provide a speed command curve), while the
latter responsible for speed control of the traction machine, ensuring smooth speed
variation during the whole running process to provide excellent comfort. The drive system
also calculates the speed command curve, automatically generating a speed curve
according to the target speed step given by the control system under multi-step control. In
all control modes, the drive system is mainly to control the motor to run strictly to the
speed command curve.
-S3 Inverter, a typical elevator drive system, is to be
combined with a specific control system for the elevator to form a complete electrical
control system. Applicable control systems include SMART COM from STEP and similar
elevator control systems.
In the application of
-S3 Inverter to elevator control, a speed control mode
(analog or multi-step) shall be first selected according to the controller of the elevator.
Then a communication path shall be designed according to the requirements on the
communication between the Inverter and the controller. The next step is to set the
parameters as required and perform autotuning with synchronous motors. Finally, make
adjustments to elevator running direction, speed curve and elevator comfort on site. The
whole process is shown as follows:
Application of Elevator
7-
1