WEG CFW-11 Series, Programming Manual

Page: 128 / 307

Vector Control
11-10
11
Examples: 1 hp/0.75 kW, IV poles:
η
= 0.76 resulting in TB1 = 0.32.
20 hp/15.0 kW, IV poles:
η
= 0.86 resulting in TB1 = 0.16.
T
T
nom
N
N
nom
TB1
1.0
0
0
0.2 1.0 2.0
(c)
(b)
(a)
Figure 11.3 - T x N curve for Optimal Braking with a typical 10 hp/7.5 kW motor,
driven by an inverter with the torque adjusted at a value equal to the motor rated torque
(a) Torque generated by the motor in normal operation, driven by the inverter in the "motor mode" (load resistant
torque).
(b) Braking torque generated by the Optimal Braking use.
(c) Braking torque generated by the DC braking use.
In order to use the Optimal Braking:
(a) Activate the optimal braking by setting P0184 = 0 (DC Link Regulation Mode = with losses) and set the
DC link regulation level in P0185, as presented in the Item 11.8.7 DC Link Regulator [96] on page 11-30 ,
with P0202 = 3 or 4 and P0404 smaller than 21 (75hp).
( b) In order to enable and disable the Optimal Braking via a digital input, set one of the inputs (DIx) for
"DC Link Regulation". (P0263…P0270 = 25 and P0184 = 2).
Results:
DIx = 24 V (closed): Optimal Braking is active, equivalent to P0184 = 0.
DIx = 0 V (open): Optimal Braking is inactive.
11.7 MOTOR DATA [43]
In this group are listed the parameters for the setting of the used motor data. Adjust them according to the
motor nameplate data (P0398 to P0406), except P0405, and by means of the self-tuning routine or with the
data existent in the motor data sheet (the other parameters). In the Vector Control mode the parameters P0399
and P0407 are not used.