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Q&A Parallel RLC circuit

It all depends on the values of the components:If the system will very slowly decay until the energy of the system reaches 0. If the system undergoes something which will look like a part of...

posted 3y ago by MissMulan‭  ·  edited 3y ago by MissMulan‭

Answer
#3: Post edited by user avatar MissMulan‭ · 2021-09-09T19:07:44Z (about 3 years ago)
  • It all depends on the values of the components:If
  • ![](https://electrical.codidact.com/uploads/i8DAX2tLRnQV7eBAtFq2icWe)
  • the system will very slowly decay until the energy of the system reaches 0.
  • If
  • ![](https://electrical.codidact.com/uploads/B6ExJnRcfsKJ7YkuCPD3pLqT)
  • the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • If
  • ![](https://electrical.codidact.com/uploads/tq5b12LFXuLwFC2ftNo13hGn)
  • it oscillates with decreasing amplitude until its energy reaches 0.
  • In our case:
  • ![](https://electrical.codidact.com/uploads/hD4do1vwvtgLKFgitYFhNn4W)
  • ![](https://electrical.codidact.com/uploads/3sWeeK3anc8eJ9AFN32Jeocw)
  • so the the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • In order to find the equation of current of this RLC circuit we must be introduced to 2 things:
  • Neper angular frequency -> a feature of damped systems
  • In the case of parallel RLC circuit:
  • ![](https://electrical.codidact.com/uploads/URb9QdFB2ykW5fvky94LtMbk)
  • The equation of voltage of this critically damped system is:
  • ![](https://electrical.codidact.com/uploads/UugmkJbUDkbkQm8NeBKsdBGc)
  • where:
  • ![](https://electrical.codidact.com/uploads/1cC9oLUb2YREr7YYNHV8ZJJw)
  • After the switch is closed:
  • ![](https://electrical.codidact.com/uploads/2TDa7qi1quvsA8DgA2PpaAeW)
  • and due to C1:
  • ![](https://electrical.codidact.com/uploads/Su4ysErWs8KeTXvS3JQ5ECr8)
  • so the current through C1 is:
  • ![](https://electrical.codidact.com/uploads/DZEgJiDg4yLjkyM15k735Cfh)
  • By substituting the values VC1(0+),iIC1(0+) and a we get:
  • ![](https://electrical.codidact.com/uploads/zf5m1Bn1LPH13qiNw1XX8ZFu)
  • This is the equation of the voltage of the top common node of C1,L1,R1 after the switch is closed.
  • It all depends on the values of the components:If
  • ![](https://electrical.codidact.com/uploads/i8DAX2tLRnQV7eBAtFq2icWe)
  • the system will very slowly decay until the energy of the system reaches 0.
  • If
  • ![](https://electrical.codidact.com/uploads/B6ExJnRcfsKJ7YkuCPD3pLqT)
  • the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • If
  • ![](https://electrical.codidact.com/uploads/tq5b12LFXuLwFC2ftNo13hGn)
  • it oscillates with decreasing amplitude until its energy reaches 0.
  • In our case:
  • ![](https://electrical.codidact.com/uploads/dSK6gZHGTG6VwKhsApBGZKvJ)
  • ![](https://electrical.codidact.com/uploads/3sWeeK3anc8eJ9AFN32Jeocw)
  • so the the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • In order to find the equation of current of this RLC circuit we must be introduced to 2 things:
  • Neper angular frequency -> a feature of damped systems
  • In the case of parallel RLC circuit:
  • ![](https://electrical.codidact.com/uploads/URb9QdFB2ykW5fvky94LtMbk)
  • The equation of voltage of this critically damped system is:
  • ![](https://electrical.codidact.com/uploads/UugmkJbUDkbkQm8NeBKsdBGc)
  • where:
  • ![](https://electrical.codidact.com/uploads/1cC9oLUb2YREr7YYNHV8ZJJw)
  • After the switch is closed:
  • ![](https://electrical.codidact.com/uploads/2TDa7qi1quvsA8DgA2PpaAeW)
  • and due to C1:
  • ![](https://electrical.codidact.com/uploads/Su4ysErWs8KeTXvS3JQ5ECr8)
  • so the current through C1 is:
  • ![](https://electrical.codidact.com/uploads/DZEgJiDg4yLjkyM15k735Cfh)
  • By substituting the values VC1(0+),iIC1(0+) and a we get:
  • ![](https://electrical.codidact.com/uploads/zf5m1Bn1LPH13qiNw1XX8ZFu)
  • This is the equation of the voltage of the top common node of C1,L1,R1 after the switch is closed.
#2: Post edited by user avatar MissMulan‭ · 2021-09-08T16:36:23Z (about 3 years ago)
  • It all depends on the values of the components:If
  • ![](https://electrical.codidact.com/uploads/i8DAX2tLRnQV7eBAtFq2icWe)
  • the system will very slowly decay until the energy of the system reaches 0.
  • If
  • ![](https://electrical.codidact.com/uploads/B6ExJnRcfsKJ7YkuCPD3pLqT)
  • the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • If
  • ![](https://electrical.codidact.com/uploads/tq5b12LFXuLwFC2ftNo13hGn)
  • it oscillates with decreasing amplitude until its energy reaches 0.
  • In our case:
  • ![](https://electrical.codidact.com/uploads/hD4do1vwvtgLKFgitYFhNn4W)
  • ![](https://electrical.codidact.com/uploads/3sWeeK3anc8eJ9AFN32Jeocw)
  • so the the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • In order to find the equation of current of this RLC circuit we must be introduced to 2 things:
  • Neper angular frequency -> a feature of damped systems
  • In the case of parallel RLC circuit:
  • ![](https://electrical.codidact.com/uploads/URb9QdFB2ykW5fvky94LtMbk)
  • The equation of voltage of this critically damped system is:
  • ![](https://electrical.codidact.com/uploads/UugmkJbUDkbkQm8NeBKsdBGc)
  • where:
  • ![](https://electrical.codidact.com/uploads/1cC9oLUb2YREr7YYNHV8ZJJw)
  • After the switch is closed:
  • ![](https://electrical.codidact.com/uploads/2TDa7qi1quvsA8DgA2PpaAeW)
  • and due to C1:
  • ![](https://electrical.codidact.com/uploads/Su4ysErWs8KeTXvS3JQ5ECr8)
  • so the current through C1 is:
  • ![](https://electrical.codidact.com/uploads/DZEgJiDg4yLjkyM15k735Cfh)
  • By substituting the values VC1(0+),iIC1(0+) and a we get:
  • ![](https://electrical.codidact.com/uploads/zf5m1Bn1LPH13qiNw1XX8ZFu)
  • This is the equation of the voltage of the top branch of the loop consisting of C1,L1,R1 after the switch is closed.
  • It all depends on the values of the components:If
  • ![](https://electrical.codidact.com/uploads/i8DAX2tLRnQV7eBAtFq2icWe)
  • the system will very slowly decay until the energy of the system reaches 0.
  • If
  • ![](https://electrical.codidact.com/uploads/B6ExJnRcfsKJ7YkuCPD3pLqT)
  • the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • If
  • ![](https://electrical.codidact.com/uploads/tq5b12LFXuLwFC2ftNo13hGn)
  • it oscillates with decreasing amplitude until its energy reaches 0.
  • In our case:
  • ![](https://electrical.codidact.com/uploads/hD4do1vwvtgLKFgitYFhNn4W)
  • ![](https://electrical.codidact.com/uploads/3sWeeK3anc8eJ9AFN32Jeocw)
  • so the the system undergoes something which will look like a part of a oscillation and loses its energy very quickly
  • In order to find the equation of current of this RLC circuit we must be introduced to 2 things:
  • Neper angular frequency -> a feature of damped systems
  • In the case of parallel RLC circuit:
  • ![](https://electrical.codidact.com/uploads/URb9QdFB2ykW5fvky94LtMbk)
  • The equation of voltage of this critically damped system is:
  • ![](https://electrical.codidact.com/uploads/UugmkJbUDkbkQm8NeBKsdBGc)
  • where:
  • ![](https://electrical.codidact.com/uploads/1cC9oLUb2YREr7YYNHV8ZJJw)
  • After the switch is closed:
  • ![](https://electrical.codidact.com/uploads/2TDa7qi1quvsA8DgA2PpaAeW)
  • and due to C1:
  • ![](https://electrical.codidact.com/uploads/Su4ysErWs8KeTXvS3JQ5ECr8)
  • so the current through C1 is:
  • ![](https://electrical.codidact.com/uploads/DZEgJiDg4yLjkyM15k735Cfh)
  • By substituting the values VC1(0+),iIC1(0+) and a we get:
  • ![](https://electrical.codidact.com/uploads/zf5m1Bn1LPH13qiNw1XX8ZFu)
  • This is the equation of the voltage of the top common node of C1,L1,R1 after the switch is closed.
#1: Initial revision by user avatar MissMulan‭ · 2021-09-08T16:07:21Z (about 3 years ago)
It all depends on the values of the components:If

![](https://electrical.codidact.com/uploads/i8DAX2tLRnQV7eBAtFq2icWe)

the system will very slowly decay until the energy of the system reaches 0.

If

![](https://electrical.codidact.com/uploads/B6ExJnRcfsKJ7YkuCPD3pLqT)

the system undergoes something which will look like a part of a oscillation and loses its energy very quickly

If

![](https://electrical.codidact.com/uploads/tq5b12LFXuLwFC2ftNo13hGn)

it oscillates with decreasing amplitude until its energy reaches 0.

In our case:

![](https://electrical.codidact.com/uploads/hD4do1vwvtgLKFgitYFhNn4W)

![](https://electrical.codidact.com/uploads/3sWeeK3anc8eJ9AFN32Jeocw)

so the the system undergoes something which will look like a part of a oscillation and loses its energy very quickly

In order to find the equation of current of this RLC circuit we must be introduced to 2 things:

Neper angular frequency -> a feature of damped systems

In the case of parallel RLC circuit:

![](https://electrical.codidact.com/uploads/URb9QdFB2ykW5fvky94LtMbk)

The equation of voltage of this critically damped system is:

![](https://electrical.codidact.com/uploads/UugmkJbUDkbkQm8NeBKsdBGc)

where:

![](https://electrical.codidact.com/uploads/1cC9oLUb2YREr7YYNHV8ZJJw)

After the switch is closed:

![](https://electrical.codidact.com/uploads/2TDa7qi1quvsA8DgA2PpaAeW)

and due to C1:

![](https://electrical.codidact.com/uploads/Su4ysErWs8KeTXvS3JQ5ECr8)

so the current through C1 is:

![](https://electrical.codidact.com/uploads/DZEgJiDg4yLjkyM15k735Cfh)

By substituting the values VC1(0+),iIC1(0+) and a we get:

![](https://electrical.codidact.com/uploads/zf5m1Bn1LPH13qiNw1XX8ZFu)

This is the equation of the voltage of the top branch of the loop consisting of C1,L1,R1 after the switch is closed.