US 11,784,584 B2
Variable mutual off time control for automotive power converter
Boris Curuvija, West Bloomfield, MI (US); Baoming Ge, Okemos, MI (US); and Fan Xu, Novi, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Jan. 31, 2020, as Appl. No. 16/778,808.
Prior Publication US 2021/0242798 A1, Aug. 5, 2021
Int. Cl. B60L 50/10 (2019.01); H02M 7/527 (2006.01)
CPC H02M 7/527 (2013.01) [B60L 50/10 (2019.02); B60L 2210/40 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An automotive vehicle comprising:
a traction battery;
an electric machine;
an inverter configured to transfer power between the traction battery and electric machine, and including a pair of switches defining a phase leg for the electric machine; and
a controller configured to
detect a magnitude of current output by the phase leg,
select a mutual off time according to the magnitude, including responsive to the magnitude exceeding a first predetermined threshold, setting the mutual off time to a first value, and responsive to the magnitude being less than a second predetermined threshold, setting the mutual off time to a second value less than the first value, and
generate pulse width modulation signals for the switches having the mutual off time to transfer power between the traction battery and electric machine such that as the magnitude decreases the mutual off time decreases.