Nissan Leaf. Manual - part 1184

SYSTEM

TMS-17

< SYSTEM DESCRIPTION >

D

E

F

G

H

I

J

K

L

M

A

B

TMS

N

O

P

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 

TMS-25, "Fail-safe"

.

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 >

D

E

F

G

H

I

J

K

L

M

A

B

TMS

N

O

P

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.