Choke and electronic equipment using it
A choke coil and coil technology, which is applied in the fields of electronic equipment and choke coils, can solve the problems of difficulty in suppressing the DC resistance value, increase in cost, and increase in installation space.
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Embodiment approach 1
[0029] Figure 1A , Figure 1B It is a plan view before folding and a perspective view after folding of the terminal and center tap-integrated coil 1 of the present invention, Figure 2A , Figure 2B ,and Figure 2C This is a structural diagram of a choke coil composed of a terminal with 2.5 turns and a coil 1 with an integrated center tap. Figure 2A For the stereogram, Figure 2B for its top view, Figure 2C for the wiring diagram. image 3 yes Figure 2A , Figure 2B , Figure 2C A cross-sectional view of a choke coil. in addition, Figure 4 It is a circuit diagram of a power supply circuit using a polyphase system.
[0030] First, if Figure 1A As shown, the terminal and center tap integrated coil 1 is formed by etching or punching a flat metal plate such as copper or silver, and cutting out three circular arc-shaped parts 2 in a ring shape, protruding from one of the circular arc-shaped parts 2 The center tap 3 and the two terminals 4 extending from the end of...
Embodiment approach 2
[0055] Referring to Fig. 5A, Figure 5B , Figure 5C A choke coil according to Embodiment 2 will be described. The basic structure of the terminal-and-center-tap-integrated coil 1 is the same as that of the first embodiment, but one coil is added to form a choke coil in which two coils are embedded in a magnet. Hereinafter referred to as "two consecutive choke coils".
[0056] Figure 5A, Figure 5B , Figure 5C It is a structural diagram of a two-connected choke coil with a number of turns of 2.5 turns. The middle tap 3 protrudes from the 1.25th turn, and the two terminals 4 and the middle tap 3 are respectively exposed on different surfaces. Adjacent coils are arranged such that the directions of the magnetic flux passing through the center are opposite to each other when a current flows. Figure 5A is a perspective view, Figure 5B is a top view, Figure 5C is an example of a wiring diagram. I1 and I2 are input terminals, O1 and O2 are output terminals, and I / O1 and ...
Embodiment approach 3
[0070] Refer below Figure 8A , Figure 8B , Figure 8C , Figure 9 A choke coil according to Embodiment 3 will be described. The basic structure of the choke coil is the same as that of the choke coil of the first embodiment.
[0071] exist Figure 8A , Figure 8B , Figure 8C Among them, a three-terminal and center-tap-integrated coil 1 is embedded in a square-shaped magnet in a negative-coupling arrangement. All terminals 4 are exposed from one surface, and all intermediate taps 3 are exposed from the surface opposite to this surface. Figure 8A is a stereogram, Figure 8B is a top view, Figure 8C This is the wiring diagram when connecting this choke coil to a multiphase and transformer type power supply circuit. That is, I1, I2, and I3 are input terminals, O1, O2, and O3 are output terminals, and I / O1, I / O2, and I / O3 are intermediate taps 3 that are connected to switching elements. That is, the three-terminal and center-tap-integrated coils 1 of such a structur...
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Abstract
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