Tachometer Voltage Regulator/Rectifier Issue

[j_martin]

Re: Tachometer Voltage Regulator/Rectifier Issue

Thanks - John

My motor does have (2) Regulators.

I more or less understand what you saying about how the (2) yellow wires work in a bridged Regulator circuit. So, correct me if Im wrong.

The (2) Red wires (on a single regulator) are connected to the Starter Solinoid and the battery (+) is connected there as well. Thus putting (+) voltage (DCV) on both wires.

First, the Rectifier/Regulator has a ACV circuit design and DCV circuit design. The end result...take ACV voltage convert it to DCV to charge the batteries.

Correct me if im wrong.
So, the Stator sends (+) voltage (ACV) to the Regulator which is grounded via set of diodes - then converts ACV to DCV - the converted ACV to DCV is then put on the Regulator Circuit which correspondes with the Red Wires going to the Starter Solinoid and battery.

The grey wire is non converted ACV voltage that provides the Tach with a variable degree of voltage depending upon how fast the motor is throttled. Thus, rendering RPM readings on the Tach dial itself.

I think my confusion comes from previous posts...where someone said, just take one of the yellow wires coming from the Stator and directly hook it up to the Tach....and I do believe you told me that I should be getting 15v (ACV) on both Yellow wires. I know that you'll know what your talking about and I probably just interpret'd it the wrong way. I do truly appreciate everyone's input.

So, now your saying my Stator may be Ok...and again the VR's are most likely bad.

The 15V ac is measured between the two yellow wires of any pair. (one meter lead on each wire) not to ground, and the two wires must both be connected to the same coil. The stator has two coils with 2 yellow wires on each coil.

That 15V, if connect to a (working)rectifier, or the input of a working voltage regulator, will generate a tach signal to ground. It will not generate that signal if it is not connected, or if it is connected to a defective voltage regulator or diode.

The grey wire on a voltage regulator just taps that signal off the stator input(with some buffering circuitry)

If you are still confused, get some help.

 

[gbc_redfisher]

Re: Tachometer Voltage Regulator/Rectifier Issue

Posting a Final Report:

J_Martin - I looked at a simple schematic for a bridged rectifier, which helped me further understand the logic behind your explanation. Thanks!

So, I Replaced both Regulators/Rectifiers and my Tach is back in action again. I appreciate everyone's help!

Thanks!

~Greg