Table of Contents
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Drive Setup
E
= Total energy consumed by the amplifier (J)
M
C=Bus module capacitance (F); please refer to the Bus Specifications section
V
= Hysteresis point: the regenerative circuit is turned on (V); please refer to the Bus
High
Specifications section.
V
= Hysteresis point: the regenerative circuit is closed (V); please refer to the Bus
Low
Specifications section.
t
= Deceleration interval+deceleration time (s)
cycle
Determine the resistor power for peak
V
2
P
=
M
PK
R
Regen
R
= Regenerative resistor resistance (ΩL-L)
Regen
V
= Maximum bus voltage (v); please refer to the Bus Specifications section.
M
Example for the calculation of regenerative resistor resistance (in US standard units)
Motor and drive specifications
CDHD2S-006 drive, using single-phase AC voltage 240V input
J
=0.000484lb· ft· sec2
motor
R
=1.32Ω
M
I
=18A
peak
T
=19.8lb∙ft
M
C=0.001120F
V
=420V
M
K
=81.2V/krpm=0.0812V/rpm
B
k
=1.188lb· ft/A
t
System specifications
T
=1.5lb∙ft
f
J
=0.0015lb· ft· sec2
Load
V
=2,500rpm=>ω
Max
V
=240Vrms=340VDC
NOM
Deceleration interval=5s
Calculation of deceleration time
(J
+
J
( )
ω
t
=
Motor
Load
d
(T
+
T
)
M
f
—97—
=261rad/s
M
)
(
M
=
+
. 0
000484
. 0
001
) (
) (
)
+
=
261
/
19
8 .
1
5 .
0.0181
s
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