US 12,370,907 B2
On-pulse transition times for pulsed controlled electric machines using boost voltages
Paul Carvell, Santa Cruz, CA (US)
Assigned to Tula eTechnology, Inc., San Jose, CA (US)
Filed by Tula eTechnology, Inc., San Jose, CA (US)
Filed on Oct. 17, 2023, as Appl. No. 18/488,442.
Prior Publication US 2025/0121701 A1, Apr. 17, 2025
Int. Cl. B60L 15/20 (2006.01); B60L 15/04 (2006.01); B60L 15/08 (2006.01); B60W 10/08 (2006.01); H02P 6/08 (2016.01)
CPC B60L 15/2045 (2013.01) [B60L 15/04 (2013.01); B60L 15/08 (2013.01); B60W 10/08 (2013.01); H02P 6/08 (2013.01); B60L 2210/14 (2013.01); B60W 2710/083 (2013.01)] 35 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a power supply for providing a power supply voltage;
an electric machine;
a power converter couple between the power supply and the electric machine;
a pulse controller configured to selectively operate the electric machine in a pulsed mode where a work output is generated during on pulses when the electric machine is in an on-state and little to no work output is generated when the electric machine is in an off-state between on pulses; and
a boost circuit, coupled to the electric machine, the boost circuit configured to:
(a) harvest and store energy in a storage device when Back Electromagnetic Force (BEMF) energy from the electric machine exceeds the power supply voltage when the electric machine is in the off-state between pulses or transitioning from the on-state to the off-state following the end of the on pulses, and
(b) apply the stored energy from the storage device to the electric machine when transitioning from the off-state to the on-state at the onset of subsequent on pulses respectively.