Nissan Altima HL32 Hybrid. Manual - part 574

HYBRID TRANSAXLE

HBC-45

< FUNCTION DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

INVERTER ASSEMBLY : System Diagram

INFOID:0000000004211738

INVERTER ASSEMBLY : System Description

INFOID:0000000004211739

GENERAL

• The inverter converts the high-voltage direct current of the HV battery into three-phase alternating current for

driving MG1 and MG2.

• The activation of the power transistors is controlled by the hybrid vehicle control ECU, via the MG ECU. In

addition, the inverter transmits information that is needed for current control, such as the output amperage or

voltage, to the hybrid vehicle control ECU via the MG ECU.

• Together with MG1 and MG2, the inverter is cooled by the dedicated sub radiator of the coolant system that

is separate from that of the engine.

JMCIA0058GB

HBC-46

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

• In the event of a collision involving the vehicle, the sensor detects a collision signal in order to stop the sys-

tem. For details, refer to During Collision Control on 

HBC-61, "System Diagram"

.

• A boost converter is used in the inverter assembly, in order to boost the nominal voltage output by the HV

battery from DC 244.8 V to maximum voltage of DC 650 V. After the voltage is boosted, the inverter converts

the direct current into an alternating current.

• Each of the bridge circuits for MG1 and MG2 contains 6 power transistors. In addition, a signal processor/

protective function processor has been integrated into a compact IPM (Intelligent Power Module) for driving

the vehicle.

For details on the multiple functions of the inverter, refer to Inverter Assembly Control on 

HBC-45, "INVERTER

ASSEMBLY : System Diagram"

.

BOOST CONVERTER

• This boost converter boosts the nominal voltage of DC 244.8 V that is output by the HV battery to the maxi-

mum voltage of DC 650 V. The converter consists of the boost IPM (Intelligent Power Module) with a built-in

IGBT (Insulated Gate Bipolar Transistor) which performs the switching control, and the reactor which stores

energy. By using these components, the converter boosts the voltage. For details, refer to Inverter Assembly

Control on 

HBC-45, "INVERTER ASSEMBLY : System Diagram"

.

• When MG1 and MG2 acts as the generator, the inverter converts the alternating current into the maximum

voltage of DC 650 V, and then the boost converter reduces the voltage to the nominal voltage of DC 244.8 V,

thus the HV battery is charged.

MG (MOTOR GENERATOR) ECU

• The MG ECU is provided in the inverter assembly. In accordance with the signals received from the hybrid

vehicle control ECU, the MG ECU controls the inverter and boost converter in order to drive MG1 or MG2 or

cause them to generate electricity.

• The MG ECU transmits information that is required for vehicle control, such as the inverter output amperage,

inverter temperature, and any failure information, to the THS ECU. It receives information that is required for

controlling the motor generator, such as the required motive force and the motor temperature, from the

hybrid vehicle control ECU.

JMCIA0057GB

HYBRID TRANSAXLE

HBC-47

< FUNCTION DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

INVERTER ASSEMBLY : Component Parts Location

INFOID:0000000004211740

1.

Combination meter

2.

READY operation indicator light

3.

Malfunction indicator light

4.

Master warning light

5.

Data link connector

6.

Steering angle sensor

7.

Stop lamp switch

8.

Accelerator pedal position sensor

9.

ACU (Air bag diagnosis sensor unit)

10. Yaw rate/side G sensor

11. Controller (A/C auto AMP.)

12. Vehicle information display indicator

ALCIA0008ZZ

HBC-48

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

1.

Inverter with converter assembly

2.

Water pump with motor & bracket as-
sembly

3.

High voltage fuse and fusible link box
A: HV CONT MAIN fuse 10A
B: IGCT relay
C: IGCT fusible link 50A
D: DC/DC fusible link 120A

4.

HV battery

5.

Auxiliary battery

6.

Frame wire

7.

Hybrid vehicle control ECU
(located under heater box assembly)

8.

Brake ECU

9.

Electric compressor (For A/C)

10. A: Crankshaft position sensor

B: Axle

11. ECM

Vehicle front

ALCIA0009ZZ