Hyundai Creta: Charging System / Alternator

Description and operation

Description
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" terminal.
In addition, the charging voltage of this alternator is regulated by the battery voltage detection system.
The alternator is regulated by the battery voltage detection system.
The main components of the alternator are the rotor, stator, rectifier, capacitor brushes, bearings and V-ribbed belt pulley.
The brush holder contains a built-in electronic voltage regulator.

1. Brush
2. Drive belt pulley
(OAD : Overrunning Alternator Decoupler)
3. Rotor
4. Stator
5. Rectifier

Specifications

Specification
Alternator
Item
Specification
Rated voltage
13.5V, 110A
Speed in use
1,000 ~ 18,000 rpm
Voltage regulator
IC Regulator built-in type
Regulator Setting Voltage
External mode
Refer to below graph
Internal mode
14.55 ± 0.3V
Temperature Gradient
External mode
0 ± 3 mV / °C
Internal mode
-3.5 ± 2mV / °C

※ Regulator Setting Voltage (External mode)

Components and components location

Components

1. OAD (Overrunning Alternator Decoupler)
2. Front Housing
3. Front Bearing
4. Stator
5. Rotor
6. Rear Bearing
7. Rear Housing
8. Rectifier Assembly
9. Regulator Assembly
10. Rear Cover


Schematic diagrams

Circuit Diagram

Repair procedures

Removal
1.
Disconnect the battery negative terminal.
2.
Loosen the mounting bolts (A) and then, turn the adjusting bolt (B) clockwise to loosen tension.

3.
Remove the drive belt (A).

4.
Disconnect the air compressor connector (A) and the alternator connector (B), and remove the cable (C) from alternator "B" terminal.

5.
Remove the alternator (A).

Installation
1.
Install in the reverse order of removal.
2.
Adjust the alternator belt tension after installation.
(Refer to Engine Mechanical System - "Drive Belt")
Alternator upper bolt:
19.6 ~ 26.5 Nm (2.0 ~ 2.7 kgf.m, 14.5 ~ 19.5 Ib-ft)
Alternator lower bolt:
29.4 ~ 41.2 Nm (3.0 ~ 4.2 kgf.m, 21.7 ~ 30.4 Ib-ft)
Alternator B-terminal cable mounting nut:
9.8 ~ 14.7 N.m (1.0 ~ 1.5 kgf.m, 7.2 ~ 10.8 Ib-ft)
Disassembly
1.
Remove the rear cover (A) after removing nuts.

2.
Remove the mounting bolts (A) and the brush holder assembly (B).

3.
Remove the slip ring guide (A) after pulling it.

4.
Remove the OAD (Overrunning Alternator Decoupler) cap.
  
When installing, replace with new OAD cap.
5.
Remove the OAD(Overrunning Alternator Decoupler) pulley (A) using the special tool.

6.
Unsolder the 3 stator leads (A).

7.
Remove the 4 through bolts (A).

8.
Disconnect the rotor (A) and bracket (B).

Reassembly
1.
Reassemble in the reverse order of disassembly.
  
When reassembling OAD pulley, replace with newOAD cap.
Inspection
[Rotor]
1.
Check that there is continuity between the slip rings (C).
2.
Check that there is no continuity between the slip rings and the rotor (B) or rotor shaft (A).

3.
If the rotor fails either continuity check, replace the alternator.
[Stator]
4.
Check that there is continuity between each pair of leads (A).

5.
Check that there is no continuity between each lead and the coil core.
6.
If the coil fails either continuity check, replace the alternator.
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