Nissan Altima HL32 Hybrid. Manual - part 570

HYBRID CONTROL SYSTEM

HBC-29

< FUNCTION DIAGNOSIS >

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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

ALCIA0004ZZ

HBC-30

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

HYBRID TRANSAXLE

MOTOR AND GENERATOR
MOTOR AND GENERATOR : System Diagram

INFOID:0000000004211732

MOTOR AND GENERATOR : System Description

INFOID:0000000004211733

GENERAL

• Serving as the source of supplemental motive force that provides power assistance to the engine as needed,

the electric motor helps the vehicle achieve excellent dynamic performance, including smooth start-offs and

acceleration. When the regenerative brake is activated, MG2 (Motor Generator No.2) converts the vehicle's

kinetic energy into electrical energy, which is then stored in the HV battery.

• MG1 (Motor Generator No.1) recharges the HV battery and supplies electrical power to drive MG2. In addi-

tion, by regulating the amount of electrical power generated (thus varying the generator's rpm), MG1 effec-

tively controls the continuously variable transmission function of the hybrid transaxle. MG1 also serves as

the starter to start the engine.

• Both the MG1 and MG2 are compact, lightweight, and highly efficient alternating current permanent magnet

synchronous type.

• Both the MG1 and MG2 use a rotor containing a V-shaped, high-magnetic force permanent magnet that

maximizes the generation of reduction torque. They use a stator made of a low core-loss electromagnetic

steel sheet and a high voltage resistant winding wire. Through these measures, the MG1 and MG2 have

realized high output and torque in a compact construction.

JMCIA0052GB

HYBRID TRANSAXLE

HBC-31

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• A inverter cooling system via water pump for the MG1 and MG2 has been added. For details, refer to the

inverter cooling system (for Inverter, MG1 and MG2) on 

HBC-51, "System Diagram"

.

MG1 Specifications

MG2 Specifications

*: These voltage are converted into an alternating current and then supplied to MG1and MG2.

PERMANENT MAGNET MOTOR (FOR MG1 AND MG2)

• When a three-phase alternating current is passed through the three-phase windings of the stator coil, a rota-

tional magnetic field is created in the electric motor. By controlling this rotating magnetic field according to

the rotor's rotational position and speed, the permanent magnets that are provided in the rotor become

attracted by the rotating magnetic field, thus generating torque.

The generated torque is for all practical purposes proportionate to the amount of current, and the rotational

speed is controlled by the frequency of the alternating current.

Furthermore, a high level of torque, all the way to high speeds, can be generated efficiently by properly con-

trolling the rotating magnetic field and the angles of the rotor magnets.

JMCIA0051GB

Type

Permanent magnet motor

Function

Generate, engine starter

Maximum system voltage*

DC 650 V

Inverter cooling system

Water-cooled

Type

Permanent Magnet Motor

Function

Generate, Drive Front Wheels

Maximum System Voltage*

DC 650 V

Maximum Output

105 kW (141 HP)

Maximum Torque

270 N·m (199 ft-lbf)

Inverter Cooling System

Water-cooled

HBC-32

< FUNCTION DIAGNOSIS >

HYBRID TRANSAXLE

• When the motor generates electricity, the rotor rotates to create a magnetic field, which creates a current in

the stator coil.

SPEED SENSOR/RESOLVER (FOR MG1 AND MG2)

• This is an extremely reliable and compact sensor that precisely detects the magnetic pole position, which is

indispensable for ensuring the efficient control of MG1 and MG2.

• The stator of the sensor contains three types of coils: excitation coil A, detection coil S, and detection coil C.

The detection coils S and C are electrically staggered 90 degrees.

The rotor is oval, the distance of the gap between the stator and the rotor varies with the rotation of the rotor.

• The flow of an alternating current into an excitation coil A results in the output of signals of a constant fre-

quency. Coil S and coil C output values that correspond to the position of the rotor. Therefore, the MG ECU

detects the absolute position based on the difference between the coil S and coil C output values.

JMCIA0053GB

JMCIA0054GB