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Mehdi1357
Joined: 18 Jan 2008
Posts: 25
Helped: 1
Location: the Earth
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 28 Jan 2008 14:43 Generating an accurate 3-phase sine wave! |
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Hi to all
I want to generate an accurate 3-phase sine wave with 16Khz & 15V amplitude.
please give me an idea to generate it.
thanks you for your viewpoints.
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28 Jan 2008 14:43 Ads |
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FvM
Joined: 22 Jan 2008
Posts: 5161
Helped: 767
Location: Bochum, Germany
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28 Jan 2008 15:05 Re: Generating an accurate 3-phase sine wave! |
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Accuracy is relative, would be better to have a specification (frequency, amplitude, phase, distortion). You can generate it analog or digitally. For digital generation, single chip DDS could be used.
An analog generator could be made from two integrators ("state variable filter/oscillator") and an amplitude stabilizer, directly producing 90° phase shifted quadrature components. Three-phase signal can be obtained from linear combination of quadrature components, or by phase shifter.
P.S.: Please delete your manifold cross-postings
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Eugen_E
Joined: 29 Nov 2004
Posts: 358
Helped: 31
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29 Jan 2008 13:36 Re: Generating an accurate 3-phase sine wave! |
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| DDS is suited for this application. Since the frequency is quite low, you can use a 3 channel software DDS implemented with a microcontroller. To get pure signals u can use 3 LPF at each output. The phase difference would still be 120deg.
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Mehdi1357
Joined: 18 Jan 2008
Posts: 25
Helped: 1
Location: the Earth
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29 Jan 2008 19:50 Re: Generating an accurate 3-phase sine wave! |
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I appreciate you for your viewpoints.
Yes,DDS is a suitable method.
I want to use AD9834 in my project.
thank you.
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