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1-70
1-70
8 8 . . 5 5
C C h h e e c c k k i i n n g I
Disconnect the battery plug and discharge the inverters before working on electrical system.
Disconnect the battery plug and discharge the inverters before working on electrical system.
(1) Disco
(1)
Disconnect
nnect all five
terminals.
terminals.
(2) Chec
(2)
Check the re
k the resista
the following table.
the following table.
Positive
Positive
probe
probe
N N
U U
V V
V V
Note: Short- or
Note: Short- or open-circuits of the inverter MOSFET can be determined with this check. Other internal faults cannot be
open-circuits of the inverter MOSFET can be determined with this check. Other internal faults cannot be
determined with this check.
determined with this check.
8 8 . . 6 6
R R e e g g e e n n e e r r a a t t i i o o n n C C h h e e c c k k
The AC motor uses
The AC m
otor uses a common
regenerat
regeneration
ion operation.
operation.
(1)
(1) Plac
Place the cla
e the clamp amm
the inverter's
the inverter's
(1)
(1)
term
terminal (u
inal (use DC cu
direction as current flows from the battery to the
direction as current flows from the battery to the
inverter.
inverter.
(2)
(2) Run the t
Run the truck fo
ruck forwar
in F position, release the accelerator pedal. Then
in F position, release the accelerator pedal. Then
perform a full-reverse operation.
perform a full-reverse operation.
(3)
(3) The cla
The clamp amm
mp ammete
value becomes the
value becomes the regenerat
Energy is generated when a motor is rotated by an external force. The regeneration power is produced when this energy is
Energy is generated when a motor is rotated by an external force. The regeneration power is produced when this energy is
larger than the one that is consumed by the controller and
larger than the one that
the speed or load changes gradually.
the speed or load changes gradually.
g In n v v e e r r t t e e r r
all five powe
power cabl
r cables fro
es from P, N, U
m P, N, U, V and W
sistance be
nce betwee
tween the ter
n the terminal a
minal as shown i
N N eg
egat ati i ve p
ve pro
robe
be
Re
Resi sist stan
ance (
U U
V V
W W
1 k to ∞ ∞
1 k to
P P
a common circuit fo
circuit for current
r current flow in bo
mp ammeter o
eter onto th
nto the cable c
e cable connec
se DC curren
rrent rang
t range). Th
e). This is pos
is is positive
rward. With t
d. With the dir
he directio
ection lever s
n lever shifte
eter shoul
r should show a n
d show a negat
egative val
ive value. Thi
regeneration current.
ion current.
is consumed by the controller and motor. This means that the
CAUTION
CAUTION
, V and W
s shown in n
-
-
ce (o o hm
hm) )
flow in both loading a
th loading and regener
nd regeneration. The
onnected to
ted to
itive
hifted d
ue. This s
motor. This means that the regeneratio
CHAPTER 1 CONTROLLER
CHAPTER 1 CONTROLLER
+
+
ation. The following pro
following procedure w
cedure will check th
Clamp ammeter
Clamp ammeter
setting direction
setting direction
regeneration current is not
n current is not measured if
500963
500963
ill check the e
500964
500964
measured if
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