kevin
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Posts: 2 
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Post by kevin on Apr 23, 2016 18:31:42 GMT -8
Hello , I have this circuit and am having problems with the opamp going bad. I am trying to use this circuit and waveform in a couple of different circuit applications. The first application is for a signal generator driving a power amp section of an inductive load. Im not exactly electronics savy so bare with me please... Tools I have are a Tektronix 2246 4 channel scope with 1 signal probe iotech UA78D+ LCR meter
Circuit History :
I created this waveform using a small audio transformer and 555 circuitry that was very unstable but was able to get a picture of it and posted the waveform picture on a website to ask for help in creating a stable circuit to produce the waveform.A fella helped and designed this circuit for me and I have built it and been trying to go further on my own without much success. If anyone is interested, the project has many more elements that I cant do on my own in a timely manner but I think I can break down into sections so as not to try and take on an overwhelming amount of continuous time. I can add more information if anyone is able and willing to help.
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Post by Gary Lecomte on Apr 24, 2016 8:24:50 GMT -8
The first application is for a signal generator driving a power amp section of an inductive load.
1) What Op-Amp are you using?
2) Why that Complex Circuit, Seems more complex than just driving a inductive load with a frequency?
3) What is the Inductance of your Load?
4) What is the Frequency of your signal?
5) supplying How Much Power to that Inductor?
Probably More Questions.
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Email me your Phone Number and What Country your in.
Probably it is a Free Call for me.
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kevin
New Member
Posts: 2
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Post by kevin on Apr 24, 2016 12:54:03 GMT -8
Here are those circuit values, Im working on getting another stage in jpg format that should be easier to see what im needing. The op-amp is a LT1632. The complex waveform is what is required for the application. Inductance is 70mH air core. Frequency is 1kHz to 5kHz short term. In the long run I'd love to have a much broader range in stages from 10 Hz to 100kHz. I'd like to be able to get up to 10 amps im just not exactly sure how much power the application will require. Ideally I would like to be able to modify an automotive 12vDC -120vAC inverter ,vary the 12vDC input and have the inverters power output be the determaining factor of the power output.
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Post by Gary Lecomte on Apr 24, 2016 16:09:25 GMT -8
It would probably be better using a Split Supply, +12/-12.
Also you should have a .1, Bypass Cap, directly across the IC's Supply Pins.
And 70mH seems a bit High, Especially if you plan for High Current.
Also might be a good idea to put an Output transistor to drive the coil.
I doubt you can modify an Inverter for these types of frequencies.
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