公开(公告)号：US20170163167A1

公开(公告)日：2017-06-08

申请号：US15412970

申请日：2017-01-23

Applicant: NTN CORPORATION

Inventor： Masatoshi MIZUTANI ,  Hiroyuki NODA ,  Natsuhiko MORI ,  Tomoya KAWAI

IPC: H02M5/458 ,  H02J3/38

CPC classification number: H02M5/458 ,  H02J3/38 ,  H02J3/383 ,  H02M3/28 ,  H02M7/48

Abstract: This power transmission device is connected between an AC wiring system connected to an AC power supply, and a DC power supply, and transmits power from the DC power supply to the AC wiring system. The power transmission device includes an AC power supply voltage signal generator, a power converter, a DC voltage conversion unit, a switching element, and a switch open/close signal generator. The switch open/close signal generator includes: a control signal generation unit to generate a control signal formed from a pulse signal; and a pulse width determination unit to receive the control signal and generate a delayed signal obtained by delaying rising of the control signal, and when the delayed signal becomes a value corresponding to a magnitude of voltage of the AC power supply voltage signal, cause the control signal to fall, thereby making the control signal into the switch open/close signal.

公开(公告)号：US20170133916A1

公开(公告)日：2017-05-11

申请号：US15412677

申请日：2017-01-23

Applicant: NTN CORPORATION

Inventor： Masatoshi MIZUTANI ,  Hiroyuki Noda ,  Natsuhiko Mori ,  Ryousuke Karasawa ,  Tomomi Goto ,  Yuuki Shimura

IPC: H02K11/04 ,  H02K1/22 ,  F03D9/25 ,  H02K1/12 ,  H02K11/00 ,  H02K7/18

CPC classification number: H02K11/046 ,  F03D9/25 ,  H02K1/12 ,  H02K1/22 ,  H02K7/183 ,  H02K11/0094 ,  H02P9/08 ,  Y02E10/725

Abstract: A power generator includes: an output iron core having an output winding wound therearound; and a field iron core having a main field winding and an auxiliary field winding wound therearound, and is a self-excitation type in which one of the output iron core and the field iron core serves as a stator and the other serves as a rotor, the main field windin is connected to a first rectifying element, the auxiliary field winding is connected to a second rectifying element, and power is generated by relative rotation of the stator and the rotor. The power generator is provided with an initial excitation unit configured to apply, to one or both of the output iron core and the field iron core, a magnetic force to a degree required for initial excitation in power generation.