FC101 Design Guide

3.2 Control Structures
Select [0] Open loop or [1] Closed loop in parameter 1-00 Conguration Mode.
3.2.1 Control Structure Open Loop
130BB892.10
100%
0%
-100%
100%
Local
reference
scaled to
Hz
Auto mode
Hand mode
LCP Hand on,
off and auto
on keys
Local
Remote
Reference
Ramp
P 4-10
Motor speed
direction
To motor
control
Reference
handling
Remote
reference
P 4-14
Motor speed
high limit [Hz]
P 4-12
Motor speed
low limit [Hz]
P 3-4* Ramp 1
P 3-5* Ramp 2
Figure 3.17 Open-loop Structure
In the conguration shown in Figure 3.17,
parameter 1-00 Conguration Mode is set to [0] Open loop.
The resulting reference from the reference handling system
or the local reference is received and fed through the ramp
limitation and speed limitation before being sent to the
motor control. The output from the motor control is then
limited by the maximum frequency limit.
3.2.2 PM/EC+ Motor Control
The Danfoss EC+ concept provides the possibility for using
high-ecient PM motors (permanent magnet motors) in
IEC standard enclosure sizes operated by Danfoss
frequency converters.
The commissioning procedure is comparable to the
existing one for asynchronous (induction) motors by
utilizing the Danfoss VVC
+
PM control strategy.
Customer advantages:
•
Free choice of motor technology (permanent
magnet or induction motor).
•
Installation and operation as know on induction
motors.
•
Manufacturer independent when selecting system
components (for example, motors).
•
Best system eciency by selecting best
components.
•
Possible retrot of existing installations.
•
Power range: 45 kW (60 hp) (200 V), 0.37–90 kW
(0.5–121 hp) (400 V), 90 kW (121 hp) (600 V) for
induction motors and 0.37–22 kW (0.5–30 hp)
(400 V) for PM motors.
Current limitations for PM motors:
•
Currently only supported up to 22 kW (30 hp).
•
LC lters are not supported with PM motors.
•
Kinetic back-up algorithm is not supported with
PM motors.
•
Support only complete AMA of the stator
resistance Rs in the system.
•
No stall detection (supported from software
version 2.80).
Product Overview Design Guide
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