Siemens A1 ユーザーズマニュアル
International English
Real Applications
MICROMASTER Applications Handbook
35
7 Real
Applications
The following examples are based on applications where Siemens Drives have
been successfully applied. In some cases the circuitry and parameter settings
have been simplified. The settings and parameters refer to Siemens
MICROMASTER MM420s.
been successfully applied. In some cases the circuitry and parameter settings
have been simplified. The settings and parameters refer to Siemens
MICROMASTER MM420s.
7.1
A Simple Fan Application
The Application uses a MIDIMASTER to control a ventilator fan in an application
where the fan is manually adjusted. By using the Advanced Operator Panel,
mounted on the cubicle door using the appropriate mounting kit, a simple control
solution without additional cabling is achieved. The operator can then adjust the
fan speed to suit ventilation requirements simply by pressing the buttons on the
panel.
where the fan is manually adjusted. By using the Advanced Operator Panel,
mounted on the cubicle door using the appropriate mounting kit, a simple control
solution without additional cabling is achieved. The operator can then adjust the
fan speed to suit ventilation requirements simply by pressing the buttons on the
panel.
7.1.1 Advantages.
· At frequencies below 50 Hz there is significant energy saving. Power is
proportional to the cube of speed, so a reduction in frequency to 45 Hz will
result in a saving of about 30%. Mechanical systems offer little or no saving.
result in a saving of about 30%. Mechanical systems offer little or no saving.
· Acoustic noise is reduced when the fan is run below base speed.
· The complete assembly can offer IP54 protection when the MICROMASTER is
mounted in a suitable cubicle.
· The Advanced Operating Panel (AOP) offers a simple control solution; panel
labelling, additional switches etc. are not needed.
· Closed loop control can be easily enabled using on board PI controller.
7.1.2 System
Specifications
Motor:
18.5 kW 400 V 3-phase induction motor
Control System: Advanced Operator Panel (AOP)
Drive:
MICROMASTER MM420 11 kW 400 V
Drive Control
Interface:
Interface:
Keypad control with start, stop and motorised potentiometer
(reverse and jog functions disabled).
(reverse and jog functions disabled).
M
MM420
11kW
MICROMASTER
Advanced Operator Panel
(Door Mounted)
Supply and RS485
Connection
3-Phase, 400 V
U, V, W Output
and Earth
Figure 7-1
Fan Application