公开(公告)号：US20180241302A1

公开(公告)日：2018-08-23

申请号：US15891768

申请日：2018-02-08

Applicant: JTEKT CORPORATION

Inventor： Koichiro MATSUHISA ,  Hiroshi SUMASU

IPC: H02M1/14 ,  B62D5/04 ,  H02P27/08 ,  H02M7/5387

CPC classification number: H02M1/143 ,  B62D5/0463 ,  H02H7/1222 ,  H02M1/32 ,  H02M7/5387 ,  H02M7/53871 ,  H02M2001/322 ,  H02P23/14 ,  H02P27/08

Abstract: When supply of electric power to an inverter using a normally-ON switching element is abnormally stopped, a flow of a current to the switching element of the inverter is reduced. An inverter circuit includes an inverter having at least one arm including two normally-ON switching elements connected in series between two lines to which a voltage of a power supply is applied, a smoothing capacitor connected between the two lines at a position between the power supply and the inverter, and a normally-OFF relay connected into the first line out of the two lines at a position between the smoothing capacitor and the inverter.

公开(公告)号：US20180083564A1

公开(公告)日：2018-03-22

申请号：US15696634

申请日：2017-09-06

Applicant: JTEKT CORPORATION

Inventor： Hiroshi SUMASU

IPC: H02P27/08 ,  H02P21/22 ,  H02P29/50 ,  H02M1/44

CPC classification number: H02P27/08 ,  H02M1/44 ,  H02P21/22 ,  H02P29/50

Abstract: A maximum spectrum peak reduction unit sets a PWM count generated by a PWM duty ratio calculation unit for a specific current control period as PWM counts for respective PWM periods within the current control period, and changes the set PWM counts for the respective PWM periods within the current control period so that a frequency component having a frequency obtained by dividing a carrier frequency in half or less is included in a PWM signal waveform within the current control period without changing a total value of the PWM counts for the respective PWM periods.