Alternator B3

The B3 is a powerful 12 V motorsport alternator. It has an optimized hand wound stator winding (3 phase triangle), high current diodes (special Zener diode chips from Bosch production to retain load-dumps) and an extra fine balanced rotor with double impregnated winding.

The multifunctional regulator (special Bosch developed ASIC) controls the alternator output voltage at B+ connection. The main benefit of this alternator is the high power output in a small low weight package. Furthermore it is optimized concerning vibration endurance.

Features

  • 210 A
  • 4,800 g
  • Clockwise rotation
  • With multifunctional regulator

Application

Application

210 A at 10,000 rpm/90°C

Max. ambient temperature

105°C, high current only with supported cooling air

Max. ambient temperature (short-term)

120°C, high current only with supported cooling air

Rotating direction

Clockwise

Technical Specifications

Mechanical Data

Body material

Cast aluminum

Weight w/o pulley

4.8 kg

Max. rotations

18,000 x 1/min

Moment of inertia

22 kg*cm2

Outer diameter w/o screw

136 mm

Length w/o pulley

117 mm

Battery B+ connection

M8x1.25

Tightening torque at B+

22 Nm

Electrical Data

Regulating voltage

14.2 V

Temperature compensation

-10 mV/K

High temperature cut off derating

-250 mV/K

Excitation resistor (L)

Internal (external on request)

Cut-in-speed

3,000 x 1/min

Characteristic

Rpm [1/min]

 

IG [A] at 90°C

3,000

 

40

3,500

 

93

4,000

 

125

5,000

 

162

6,000

 

182

7,000

 

193

8,000

 

201

9,000

 

206

10,000

 

210

11,000

 

213

12,000

 

215

14,000

 

217

16,000

 

219

18,000

 

222

Please note: Measured with U=13.1 V and t=20 min

Installation Notes

Ground connection for power and regulator is through the case. Ensure that the case has a high current, low electrical resistance connection to vehicle ground.

Operating the alternator is only permitted with the installed regulator and a connected 12 V battery (Lithium battery not proved).

The excitation current can also be realized by an external lamp (on request).

Please find further application hints at our homepage.

Rectifier diodes are designed and proved for B+ continuous output current of 210 A. The alternator is able to support more current, but this must be restricted for short time to prevent the destroying of rectifier diodes.

Ordering Information

Alternator B3

Order number: on request

Dimensions

Schematic Diagram

Downloads

Documents