公开(公告)号：US20210008802A1

公开(公告)日：2021-01-14

申请号：US16088616

申请日：2017-03-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Pedro GARCIA ,  Juan Manuel ZAMORANO ,  Luis ORTEGA

IPC: B29C64/393 ,  B33Y30/00 ,  B33Y50/02

Abstract: A printer comprising an electrical load, a control system and an electrical circuit to switchably connect the electrical load to a first phase and a second phase of a polyphase power supply. The control system monitors a first electrical current drawn by the printer on the first phase and a second electrical current drawn by the printer on the second phase. When a difference between the first electrical current and the second electrical current satisfies a threshold condition, the control system controls the electrical circuit to disconnect the electrical load from the first phase and connect the electrical load to the second phase.

公开(公告)号：US20200313579A1

公开(公告)日：2020-10-01

申请号：US16089655

申请日：2017-07-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Michele VERGANI ,  Juan Manuel ZAMORANO ,  Luis ORTEGA

IPC: H02P3/12 ,  H02P7/03 ,  B33Y50/02 ,  B29C64/393

Abstract: Examples relate to back electromotive force controllers for influencing movement of a carriage of a device in an unpowered state; the carriage being moveable by a motor responsive to a motor driver; the controller comprising: braking circuitry to couple power associated with a back electromotive force generated by displacement of the motor, due to carriage movement. to power the motor driver to urge the motor in a contrary direction to the displacement.