Inductor devices – With outer casing or housing – Potted type
Patent
1991-07-30
1992-06-23
Kozma, Thomas J.
Inductor devices
With outer casing or housing
Potted type
336107, 336192, 336198, H01F 1510, H01F 2704
Patent
active
051246805
ABSTRACT:
A cased transformer having a coil unit including a bobbin, primary and secondary coils and a cavity inside the bobbin, a core extending through the cavity, primary external connection terminals for leading two ends of the primary coil outside the case, secondary external connection terminals located on opposite sides of the case and having inner ends connected to two ends of the secondary coil inside the case and outer ends led to the outside. The case has an accommodation portion in which the coil unit is accommodated, an opening side which faces one of the two ends of the secondary coil, through which the coil unit is inserted into the accommodation portion and through which the operation of connecting the one end of the secondary coil and the inner end of the corresponding one of the secondary terminals is performed, embedment portions in which the pair of secondary terminals are embedded, and an opening which is formed in the vicinity of the other end of the secondary coil, through which an operation of connecting the other end of the secondary coil and the inner end of the other secondary terminal is performed. The cased transformer also has a cap for closing the opening, and a thermosetting resin or the like injected into the accommodation portion through the case opening side to fix components in the accommodation portion while electrically insulating them and to fix the primary terminals on the opening side.
REFERENCES:
patent: 4509033 (1985-04-01), Weiss et al.
patent: 4763094 (1988-08-01), Kojima
Kozma Thomas J.
Mitsubishi Denki & Kabushiki Kaisha
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