Gen- Exciter, Half Wave Rectifier

if the reactance is high, many prefer half wave rectification especially in olden days when silicon used to be very expensive.

hi,

thanks for your reply, i understand regarding the half wave rectifiecation, but why is the positive lead of the main armature coil is connected to the body ''grounded''?

do you have any idea?

thanks

What you have is an 3 phase rectifier this gives you a much smaller ripple on your dc output than a half wave rectifier set up would or a full wave bridge rectifier.

Regarding the positive ground it does not make any difference to the armature which polarity is ground , probably the company had a lot of these diodes and saved some money by not having to insulate the positive leg of the circuit. A fully insulated circuit would have been preferable from the point of coil insulation break down but operationally there is no problem.

not usual to see grounded excitor..pl.check if the heat sinks are insulated from silicon.otherwise the manufacturer would have grounded and saved a rotor earth fault relay since the machine is small.we generally avoid keeping any field circuit positive polarity with respect to ground.

hi

thanks for your help guys,

im going to fit an AVR and test it.

dont worry, i will be 10 meters away!

thanks