Nissan Altima HL32 Hybrid. Manual - part 572

HYBRID TRANSAXLE

HBC-37

< FUNCTION DIAGNOSIS >

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1.

Cover

2.

Compressor fuse cover

3.

MG1 connector

4.

MG2 connector

5.

Generator resolver and generator 
temperature sensor

6.

Park/Neutral position (PNP) switch

7.

Motor resolver

8.

Motor temperature sensor

9.

Hybrid transaxle (MG1, MG2, motor 
speed reduction planetary gear unit, 
power split planetary gear unit)

10. Inverter with converter assembly 

connector (MG ECU)

11. Inverter with converter assembly 

connector (Resolver)

12. Inverter with converter assembly 

(Boost converter, inverter, MG ECU)

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HBC-38

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

MG1 AND MG2 MAIN CONTROL

1.

Service plug grip

2.

Battery temperature sensor 0

3.

Battery smart unit

4.

SMRG

5.

SMRB

6.

Battery current sensor

7.

Hybrid vehicle converter

8.

Battery temperature sensor 3

9.

Intake air temperature sensor

10. Battery temperature sensor 2

11. Battery temperature sensor 1

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HYBRID TRANSAXLE

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MG1 AND MG2 MAIN CONTROL : System Diagram

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MG1 AND MG2 MAIN CONTROL : System Description

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GENERAL

• MG1, which is rotated by the engine, generates high voltage (alternating current) in order to operate MG2

and charge the HV battery. Also, it functions as a starter to start the engine.

• MG2 is driven by electrical power from MG1 or HV battery, and generates motive force for the front wheels.

• MG2 generate electricity to charge the HV battery (regenerative brake control) during braking, or when the

accelerator pedal is not being depressed.

• The MG ECU, which follows the commands of the hybrid vehicle control ECU, controls MG1 and MG2 via

the IPM (Intelligent Power Module), for driving the vehicle. Six IGBTs (Insulated Gate Bipolar Transistors)

switch ON and OFF to control the individual motors in accordance with the driving or generation operation.

MOTOR DRIVE OPERATION

• The illustration below describes the basic control for driving a motor. The IGBTs (Insulated Gate Bipolar

Transistors) in the IPM switch ON and OFF to supply a three-phase alternating current to the motor.

JMCIA0059GB

HBC-40

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

• In order to create the motive force required of the motor generator as calculated by the hybrid vehicle control

ECU, the MG ECU switches the IGBTs ON and OFF and controls the speed, in order to control the speed of

the motor generator.

MOTOR GENERATION OPERATION

The illustration below describes the basic control for the motor to generate electricity. The current that is gen-

erated sequentially by the three phases of the motor, which is driven by the wheels, is utilized to charge the

HV battery or drive another motor generator.

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