Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1998-03-27
1999-07-27
Nappi, Robert E.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
323229, H02M 706
Patent
active
059301333
ABSTRACT:
A tunnel diode is used as a rectifying device. The tunnel diode is so implemented as to suppress a flow of a current relative to an applied forward voltage of AC which is greater than a voltage at a peak value of a tunnel current. Stated in another word, use is made of a semiconductor of a wide forbidden band width so as to enable the forward turn-on voltage of the diode to be made greater than a maximum value of the applied voltage. Upon application of a reverse voltage to the diode, on the other hand, a greater tunnel current flows from a zero bias time. By connecting the tunnel diode, unlike an ordinary diode, in a reverse-bias fashion in the rectifying circuit, it is possible to realize a rectifying device whose turn-on voltage is zero and to prevent less rectifying efficiency at a power supply circuit of low voltage.
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S. Nakamura, et al., "High-Power GaN P-N Junction Blue-Light-Emitting Diodes", Japanese Journal of Applied Physics, vol. 30 No. 12A, pp. L1998-L2001, (Dec. 1991).
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Han Y. J.
Kabushiki Kaisha Toshiba
Nappi Robert E.
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