Symbol Explanation - Delta C2000 series User Manual
Classical field oriented control
ac motor drive
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Also See for C2000 series:
- User manual (936 pages) ,
- Manual (22 pages) ,
- Product application (5 pages)
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2.3 When it is running continuously
The requirement of load capacity should be less than the capacity of AC motor drive(kVA)
The requirement of load capacity=
k
P
M
cos
The motor capacity should be less than the capacity of AC motor drive
k
3
The current should be less than the rated current of AC motor drive(A)
k
I
M
Symbol explanation
: Motor shaft output for load (kW)
P
M
η
: Motor efficiency (normally, approx. 0.85)
cos
: Motor power factor (normally, approx. 0.75)
V
: Motor rated voltage(V)
M
I
: Motor rated current(A), for commercial power
M
k
: Correction factor calculated from current distortion factor (1.05-1.1, depending on PWM
method)
: Continuous motor capacity (kVA)
P
C
1
k
: Starting current/rated current of motor
S
n
: Number of motors in parallel
T
n
: Number of simultaneously started motors
S
2
: Total inertia (GD
GD
: Load torque
T
L
t
: Motor acceleration time
A
N
: Motor speed
the
_
capacity
_
of
3
V
I
10
the
_
capacity
M
M
the
_
rated
_
current
2
) calculated back to motor shaft (kg m
Chapter 12 Description of Parameter SettingsC2000 Series
_
AC
_
motor
_
drive
(
kVA
_
of
_
AC
_
motor
_
drive
_
of
_
AC
_
motor
_
drive
2
)
17-3
)
(
kVA
)
(
A
)
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