Question Regarding the Distributed Capacitance of a Winding

In summary, the conversation discusses the effects of a moving magnetic field on windings with regular capacitors and open circuits. It is debated whether the distributed capacitance within the winding can be charged by the induced voltage, or if the winding leads must be shorted for this to occur. The participants also consider the concept of distributed capacitance being treated similarly to a discrete capacitor in terms of storing energy.
  • #1
Denni
2
0
First, take the case of a winding with a regular capacitor connected to both terminals of the winding. When a moving magnetic field induces a voltage therein, the cap becomes charged and a current flows in the conductor while cap is charging, producing a magnetic field.
Next, take the case of a winding with the ends not connected, an open circuit. When a moving magnetic field induces a voltage in the open winding, will this induced voltage result in the charging of the distributed capacitance within the winding, or must the winding leads be shorted (closed circuit) in order to charge the distributed capacitance?
 
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  • #2
Think about it for a couple minutes.
 
  • #3
Bystander said:
Think about it for a couple minutes.
Thanks for the inspiration Bystander. Even though distributed capacitance is spread out over the entire winding it still must be regarded the same as a discrete cap in that to store energy into the cap work must still be done which means voltage times current.
 

What is distributed capacitance?

Distributed capacitance refers to the inherent capacitance within a winding or coil that exists between adjacent turns of the wire. This capacitance is caused by the natural insulation between the wire turns and can affect the overall electrical performance of the winding.

How does distributed capacitance affect a winding?

The presence of distributed capacitance in a winding can cause several effects, including increased impedance and voltage drop, decreased frequency response, and reduced efficiency. It can also lead to unwanted coupling between different windings in a circuit.

How is distributed capacitance calculated?

The distributed capacitance of a winding can be calculated using the formula C = (εr * ε0 * N * A) / L, where C is the distributed capacitance, εr is the relative permittivity of the insulation material, ε0 is the permittivity of free space, N is the number of turns in the winding, A is the cross-sectional area of the wire, and L is the length of the winding.

How can distributed capacitance be minimized?

There are several ways to minimize the effects of distributed capacitance in a winding. These include using low dielectric constant materials for the insulation, increasing the spacing between the wire turns, and using specialized winding techniques, such as interleaving or using multiple smaller windings instead of one large winding.

What are some common applications of distributed capacitance in windings?

Distributed capacitance is often utilized in the design of high-frequency transformers, where it allows for better coupling between the primary and secondary windings. It is also important in the design of inductors and other components used in electronic circuits, as it can affect their overall performance and efficiency.

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