Digital controlled AC current source design ?

Status
Not open for further replies.
K

kehribar

Newbie level 3
Joined
Nov 27, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,299
Hi everyone,

I want to make an AC current source design for driving solenoids.

I want to change its frequency by a microcontroller. Vin should be around 3.3 volts, and Iout max should be 300mA. Output frequency range would swing around 50-200 hz.

Thanks for any advice in advance.
k.
 

How about an H-bridge configuration, directly controlled by the microcontroller?
With a timer interrupt or PWM type of outputs (at 50% duty cycle), you can easily control the frequency in the range you mentioned.
You can add a fixed current limiter (300mA) at the supply of the H-Bridge.
If you don't like the square wave output, maybe you can add a 1:1 transformer.
With some types of transformers, you can reduce the H-Bridge configuration to 2 transistors only.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…