US 9,812,966 B2
Chopper circuit
Motoyoshi Kubouchi, Matsumoto (JP)
Assigned to FUJI ELECTRIC CO., LTD., Kawasaki-Shi, Kanagawa (JP)
Filed by FUJI ELECTRIC CO., LTD., Kawasaki-shi, Kanagawa (JP)
Filed on Feb. 23, 2017, as Appl. No. 15/440,801.
Claims priority of application No. 2016-074278 (JP), filed on Apr. 1, 2016; and application No. 2016-235240 (JP), filed on Dec. 2, 2016.
Prior Publication US 2017/0288544 A1, Oct. 5, 2017
Int. Cl. H02M 3/158 (2006.01); H02M 1/32 (2007.01); H02M 1/08 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/08 (2013.01); H02M 1/32 (2013.01); H02M 2001/0009 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A chopper circuit comprising:
a reactor;
a direct-current output circuit;
a capacitor circuit connected to a load;
a first diode and a second diode each connected to the capacitor circuit;
a first switching device connected in series to the first diode;
a second switching device connected in series to the second diode;
a short circuit detector that detects a short circuit of the first diode and a short circuit of the second diode; and
a controller that performs control of turning on the second switching device when the short circuit detector detects the short circuit of the first diode, and performs control of turning on the first switching device when the short circuit detector detects the short circuit of the second diode.