Choke coil for eliminating common mode noise and differential mode noise
First Claim
1. A choke coil for eliminating common mode noise and differential mode noise, the choke coil comprising:
- a circular first core;
a second core which is disposed inside the circular first core, the second core having a circular frame and a bridge laid in the frame; and
a couple of coils which are wound around the first core and the second core.
2 Assignments
0 Petitions
Accused Products
Abstract
A choke coil which functions not only to eliminate common mode noise but also to eliminate differential mode noise. A couple of coils are wound around a circular first core and a second core which is disposed inside the circular first core. The second core has a circular frame and a bridge which is laid in the frame. The first core may be easy to become magnetic saturation but is made of a material with a large magnetic permeability, and preferably a material with a relative magnetic permeability of several thousand, such as ferrite and amorphous. The second core is made of a material which is hard to become magnetic saturation, and preferably a material with a relative magnetic permeability of some scores to several hundred, such as dust core.
62 Citations
7 Claims
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1. A choke coil for eliminating common mode noise and differential mode noise, the choke coil comprising:
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a circular first core; a second core which is disposed inside the circular first core, the second core having a circular frame and a bridge laid in the frame; and a couple of coils which are wound around the first core and the second core. - View Dependent Claims (2, 3, 4)
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5. A choke coil for eliminating common mode noise and differential mode noise, the choke coil comprising:
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a circular core; a case for encasing the core, the case comprising; a hollow circular non-magnetic portion which has a container in which the case is placed and a lid; a magnetic portion which is disposed inside the circular non-magnetic portion, the magnetic portion having a circular frame and a bridge laid in the frame; and a couple of coils which are wound around the case. - View Dependent Claims (6, 7)
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Specification