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Old 09-16-2010, 10:28 AM
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supradupe supradupe is offline
Officially Welcomed to the 'Fest
Location: IL und CH
Join Date: Jun 2006
Posts: 189
Mein Auto: 03' e39
Originally Posted by cn90 View Post
The caption of the picture clearly says:

- "Typical BOSCH Alternator", so this is a generic diagram for BOSCH alternator.

- "Carbon Brushes + Rectifier Combination", so in plain English, this means the brushes are built into the voltage regulator.

I cannot be more clear than this.
Typical automotive alternators are all set up that way, bosch or not, don't matter.

Rectifier and voltage regulator are two separate entities. The brush is built into the voltage regulator (which you conveniently refer it as rectifier). The rectifier, also known as "diode trio", is responsible for converting ac to dc. The dc voltage is then "regulated" by a voltage regulator.

from your previous message, you repeatedly referring to the voltage regulator as "rectifier". The rectifier, i.e. the diode trio bridge, is NOT a easily replaceable part and it will fail too. The cost of a rectifier, is way over $60, and if you can find one that will fit the particular bosch model.

"4. New Voltage Regulator (a.k.a = "Rectifier")
- Here is the kicker: if checked OK, most simply re-use it but read on.... Although this is a solid-state device (no moving part), it is rated at let's say 2 million cycles of alternator revolutions, then the solid state device just fails any time after that.
- The reason most rebuilders re-use the Voltage Regulator is cost (a good Voltage Regulator costs some $50-60/each).

Last edited by supradupe; 09-16-2010 at 10:43 AM.
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