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Generator field control

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btahir90

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I am working on a project which is Automatic voltage regulator of fenerator using field contol through PWM

problem is what should be the frequency of PWM

generator draws 1 A at 50v dc field at full load and 0.5 A 19 v at no load.

my idea is to choose a mosfet and a diode to prevent transients. pwm directly from microcontroller. would it work?
 

What are the specifications of the motor you are using?

my idea is to choose a mosfet and a diode to prevent transients.
Click to expand...

where is your circuit?
 

its not a motor its an alternator of 2.5kw . i need to control its terminal voltage with field current.

- - - Updated - - -

here is cicuit diagram
mosfet using is IRF740
frequency to choose is 1kHz.
 

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    PWM circuit.jpg
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Is the circuit working?
your pwm frequency should be optimum where losses would be low
 

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