Patent ID: 9537463
Date: 2017-01-03
CPC Classifications: H01F,H02H,H03H,H04B

Claim:
1. A choke for an EMI filter, the EMI filter comprising a first filtering circuit for receiving a first input power and a second filtering circuit for receiving a second input power, the choke comprising: a magnetic core assembly comprising a first magnetic core and a second magnetic core, wherein the first magnetic core is in physical contact with the second magnetic core; a first winding coil and a second winding coil directly wound around the first magnetic core; and a third winding coil and a fourth winding coil directly wound around the second magnetic core, wherein the first winding coil, the second winding coil, the third winding coil and the fourth winding coil are coupled to each other through the magnetic core assembly, and the first winding coil, the second winding coil, the third winding coil, the fourth winding coil and the magnetic core assembly are formed as a single choke, wherein the first winding coil is serially connected with a first positive path of the first filtering circuit, the second winding coil is serially connected with a second positive path of the second filtering circuit, the third winding coil is serially connected with a first negative path of the first filtering circuit, and the fourth winding coil is serially connected with a second negative path of the second filtering circuit.