Yaskawa VCD 723 - Manual (Page 87)

Appendices
81 Motor Parameters
9/15/93
Parameter
Calculation
This procedure must be performed if the motor to be used with the VCD 723
Drive is NOT a MagneTek VCM induction AC vector motor. This calculation is
to be used for SPEED CONTROL MODE ONLY with tachometer feedback
(PG). When the application requires torque control, motor parameters should be
set and adjusted by using the tuning procedure.
This information is usually located on the motor nameplate, except for the no-
load current. If the motor manufacturer is unable to supply this information, use
30% for the dn-07 data value.
Motor Output (HP) : HP
Motor Voltage (V) : V
m
Motor Rated Speed (RPM): N
R
Motor Base Speed (RPM): N
S
No. of Poles: pp
Full Load Amps (FLA): I
FLA
No-Load Amps (NLA): I
NLA
dn-XX Calculation:
(1) dn-01 Base Speed
dn-01 = See Table A
(2) dn-02 Top Speed
(a) For constant torque applications
dn-02 = dn-01
(b) For constant HP applications
dn-02 = Top Speed (dn-02
≤
2 • dn-01)
(3) dn-03 No. of Poles
dn-03 = pp (See Table A)
(4) dn-04 No-Load Voltage: V
NL
dn-04 = V
NL
(See Table B)
(5) dn-05 Torque producing current: IT
dn-05 =
√
( I
FLA
) 2 – ( I
NLA
) 2
Required Motor
Data For
Calculation
Calculation
Method
Motor
Parameters