US 12,149,194 B2
Power supply circuit and rotary electric machine system
Yoshihisa Kubota, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Sep. 13, 2022, as Appl. No. 17/943,397.
Claims priority of application No. 2021-153635 (JP), filed on Sep. 21, 2021.
Prior Publication US 2023/0088809 A1, Mar. 23, 2023
Int. Cl. H02P 27/06 (2006.01); H02M 1/088 (2006.01)
CPC H02P 27/06 (2013.01) [H02M 1/088 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A power supply circuit configured to supply electric power to a rotary electric machine that includes: a first phase winding including a first winding portion and a second winding portion; and a second phase winding including a third winding portion and a fourth winding portion,
the power supply circuit comprising:
a first circuit that is connectable to a power supply and connected to the first phase winding; and
a second circuit that is connectable to the power supply in parallel with the first circuit and connected to the second phase winding, wherein
the first circuit includes: first to third arms in each of which an upper arm provided with a switching element and a lower arm provided with a switching element are connected at a midpoint of each arm; and a first switch,
the midpoint of the first arm is connected to one end of the first winding portion,
the midpoint of the second arm is connected to another end of the first winding portion and one end of the second winding portion,
the midpoint of the third arm is connected to another end of the second winding portion,
the first switch
is provided in series with the first winding portion or between the switching element of the upper arm of the first arm and the switching element of the lower arm of the first arm, or
is provided in series with the second winding portion or between the switching element of the upper arm of the third arm and the switching element of the lower arm of the third arm,
the second circuit includes: fourth to sixth arms in each of which an upper arm provided with a switching element and a lower arm provided with a switching element are connected at a midpoint of each arm; and a second switch,
the midpoint of the fourth arm is connected to one end of the third winding portion,
the midpoint of the fifth arm is connected to another end of the third winding portion and one end of the fourth winding portion,
the midpoint of the sixth arm is connected to another end of the fourth winding portion,
the second switch
is provided in series with the third winding portion or between the switching element of the upper arm of the fourth arm and the switching element of the lower arm of the fourth arm, or
is provided in series with the fourth winding portion or between the switching element of the upper arm of the sixth arm and the switching element of the lower arm of the sixth arm,
the first circuit further includes a third switch,
the first switch is provided in series with the first winding portion or between the switching element of the upper arm of the first arm and the switching element of the lower arm of the first arm,
the third switch is provided in series with the second winding portion or between the switching element of the upper arm of the third arm and the switching element of the lower arm of the third arm,
the second circuit further includes a fourth switch,
the second switch is provided in series with the third winding portion or between the switching element of the upper arm of the fourth arm and the switching element of the lower arm of the fourth arm,
the fourth switch is provided in series with the fourth winding portion or between the switching element of the upper arm of the sixth arm and the switching element of the lower arm of the sixth arm,
a number of turns of the first winding portion and a number of turns of the second winding portion are different from each other, and
a number of turns of the third winding portion and a number of turns of the fourth winding portion are different from each other.