Nissan Leaf. Manual — part 1184
SYSTEM
TMS-17
< SYSTEM DESCRIPTION >
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TMS
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SYSTEM
TRACTION MOTOR INVERTER
TRACTION MOTOR INVERTER : System Description
INFOID:0000000010120901
• The traction motor inverter controls the traction motor based on the target motor torque signal transmitted by
EV system CAN from the VCM.
• Traction motor inverter converts DC power from Li-ion battery to AC power, and drives traction motor accu-
rately based on resolver detection signal and current sensor detection signal.
• At deceleration, traction motor is used as generator. It converts kinetic energy generated by rotary motion of
tires (AC power) to electric energy (DC power) and charges Li-ion battery.
• If malfunction is detected, the system enters fail-safe mode. Refer to
.
SYSTEM DIAGRAM
TRACTION MOTOR INVERTER : Fail-safe
INFOID:0000000010120902
JSCIA0759GB
DTC
Vehicle behavior
P0A1B
Any of the following statuses is observed.
• No impact to vehicle behavior
• Stops drive control of traction motor
• Stops drive control of traction motor, and requires system main relay OFF to VCM
• Limits the maximum torque of traction motor to 40% or less
P0A2C
Limits the maximum torque of traction motor to 40% or less
P0A2D
Limits the maximum torque of traction motor to 40% or less
P0A2F
Stops drive control of traction motor
P0A3F
Stops drive control of traction motor
P0A44
Stops drive control of traction motor
TMS-18
< SYSTEM DESCRIPTION >
SYSTEM
P0A78
Stops drive control of traction motor
P0A8D
Stops drive control of traction motor, and requires system main relay OFF to VCM
P0BE5
Stops drive control of traction motor
P0BE6
Stops drive control of traction motor
P0BE9
Stops drive control of traction motor
P0BEA
Stops drive control of traction motor
P0C79
Stops drive control of traction motor
P318E
Either of the following statuses is observed.
• No impact to vehicle behavior
• Stops drive control of traction motor
P3193
No impact to vehicle behavior
P3197
Either of the following statuses is observed.
• Stops drive control of traction motor
• Limits the maximum torque of traction motor to 0%
P3199
Either of the following statuses is observed.
• No impact to vehicle behavior
• Stops drive control of traction motor
P319E
No impact to vehicle behavior
P31A2
Either of the following statuses is observed.
• Stops drive control of traction motor
• Limits the maximum torque of traction motor to 0%
P31A4
Either of the following statuses is observed.
• No impact to vehicle behavior
• Stops drive control of traction motor
P31A9
No impact to vehicle behavior
P31AD
Either of the following statuses is observed.
• Stops drive control of traction motor
• Limits the maximum torque of traction motor to 0%
P3240
Stops drive control of traction motor
P3241
Stops drive control of traction motor
P3242
Stops drive control of traction motor
P3243
Stops drive control of traction motor
P3244
No impact to vehicle behavior
P3245
No impact to vehicle behavior
P3247
Stops drive control of traction motor
P3249
Stops drive control of traction motor, and requires system main relay OFF to VCM
P324A
Stops drive control of traction motor
P324D
Stops drive control of traction motor
P3252
No impact to vehicle behavior
P325A
No impact to vehicle behavior
P325B
No impact to vehicle behavior
P325C
No impact to vehicle behavior
P325D
Limits the maximum torque of traction motor to 40% or less
P325E
No impact to vehicle behavior
P325F
No impact to vehicle behavior
U1000
No impact to vehicle behavior
DTC
Vehicle behavior
SYSTEM
TMS-19
< SYSTEM DESCRIPTION >
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TRACTION MOTOR INVERTER : Protection Control
INFOID:0000000010120903
When temperature of traction motor inverter or traction motor components rises, the traction motor inverter
temporarily enters a protective control state in order to protect the system. It automatically returns to the nor-
mal status if the safety is secured.
MOTOR POWER CONTROL
MOTOR POWER CONTROL : System Description
INFOID:0000000010120904
The traction motor inverter applies AC power to the traction motor according to the target motor torque signal
calculated by VCM in order to generate drive force.
MOTOR POWER CONTROL : Operating Principle
INFOID:0000000010120905
Flow of energy
MOTOR REGENERATION CONTROL
MOTOR REGENERATION CONTROL : System Description
INFOID:0000000010120906
During deceleration, the traction motor inverter drives the traction motor to function as a generator based on
the regenerative torque command signal sent via EV system CAN from the VCM, converting the kinetic torque
generated by rotation of the tires into electrical energy. The converted electrical energy charges the Li-ion bat-
tery.
Condition
Control
Normal return condition
Traction motor is overheated
Traction motor output torque is limited according to the
traction motor temperature.
Traction motor temperature drops
IGBT high temperatures seen when
traction motor speed is extremely low
IGBT switching frequency is reduced.
NOTE:
Traction motor electromagnetic noise increases.
• IGBT temperature drops
• Traction motor speed increases
IGBT is overheated
Traction motor output torque is limited according to the
IGBT temperature.
IGBT temperature drops
JPCIA0040GB
(4)
⇐
(3)
⇐
(2)
⇐
(1)
The drive torque from the
traction motor is output as
kinetic energy.
The AC power from the
traction motor inverter is
converted to magnetic en-
ergy and a rotating mag-
netic field is created in
order to generate drive
torque.
The traction motor inverter (IG-
BT) switches in order to convert
the DC power from the Li-ion
battery to AC power.
The DC power from the
Li-ion battery is input to
the traction motor invert-
er.
TMS-20
< SYSTEM DESCRIPTION >
SYSTEM
The regenerative torque that is generated when the traction motor is driven as a generator can be used as
braking force, acting similar to engine braking and reducing the burden on the service brakes.
MOTOR REGENERATION CONTROL : Operating Principle
INFOID:0000000010120907
Flow of energy
JPCIA0039GB
(1)
⇒
(2)
⇒
(3)
⇒
(4)
The kinetic energy generat-
ed by rotation of the tires
operates the traction motor
as a generator.
Rotation of the traction mo-
tor generates AC power.
The traction motor inverter
(IGBT) switches in order to
convert the AC power from the
traction motor to DC power.
The DC power regenerat-
ed by the traction motor in-
verter is used to charge
the Li-ion battery.
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