公开(公告)号：US09941831B1

公开(公告)日：2018-04-10

申请号：US15618184

申请日：2017-06-09

Applicant: Caterpillar Inc.

Inventor： Jason L. Miller ,  Ernesto Inoa ,  Jesse Gerdes ,  Alexander C. Crosman, III ,  Carlos E. Nino-Baron ,  Thomas Michael Sopko, Jr. ,  Jackson Wai ,  Ahmed Khalil

IPC: H02P25/08 ,  H02P6/08 ,  E02F9/20

CPC classification number: H02P25/08 ,  E02F9/207 ,  H02P6/08 ,  H02P2203/01

Abstract: A control system for a switched reluctance (SR) motor includes a Direct Current (DC) power source, and an inverter. The control system includes a user interface configured to enable an operator to specify a desired torque output. The control system further includes a controller which converts a DC current from the Alternating Current (AC) supplied to the SR motor by the inverter. The controller estimates an actual power output generated by the SR motor based on a DC voltage supplied by the DC power source to the inverter, and the converted DC current. The controller estimates an actual torque output based on the actual power output and a rotational speed of the SR motor. The controller compares the actual torque output and a desired torque output to calculate a torque error. The controller adjusts a torque output limit and the rotational speed of the SR motor.

公开(公告)号：US09738163B2

公开(公告)日：2017-08-22

申请号：US14558001

申请日：2014-12-02

Applicant: Caterpillar Inc.

Inventor： Rodwan Tarek Adra ,  Thomas Michael Sopko, Jr. ,  Jackson Wai ,  Carlos Eduardo Nino Baron

IPC: H02P27/00 ,  H02J3/36 ,  B60L11/08 ,  H02M1/15 ,  H02M7/48 ,  H02M7/5387 ,  H02M1/00

CPC classification number: B60L11/08 ,  B60L2200/32 ,  B60L2200/40 ,  H02M1/15 ,  H02M7/4826 ,  H02M7/5387 ,  H02M2001/008 ,  Y02T10/70 ,  Y02T10/7077

Abstract: The present disclosure is directed to an electric drive. The electric drive may include a first power inverter, a second power inverter, and a positive DC bus connecting the first power inverter and the second power inverter. The electric drive may also include a first switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may include a second switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may further include a control unit connected to the first switch and to the second switch. The control unit may be configured to selectively allow current to pass through the first switch and the second switch.

公开(公告)号：US11673477B2

公开(公告)日：2023-06-13

申请号：US16936947

申请日：2020-07-23

Applicant: Caterpillar Inc.

Inventor： Thomas Michael Sopko, Jr. ,  Jonathan Matthew Baumann ,  Carlos Eduardo Nino Baron

IPC: B60L50/51 ,  B60L50/60 ,  B60L50/40 ,  E02F9/22 ,  B60L50/70 ,  B60L53/80

CPC classification number: B60L50/51 ,  B60L50/40 ,  B60L50/66 ,  B60L50/70 ,  E02F9/2278 ,  B60L53/80 ,  B60L2200/40 ,  B60L2210/40

Abstract: An electric machine and method for powering the electric machine using interchangeable power modules that are configured to be interchangeably placed within power bays of the electric machine is disclosed. The electric machine includes an electrical module that is configured to receive power from one or more of the power modules placed in the power bays and transform, such as from DC to multi-phase alternating current (AC), and provide the power to one or more motors of the electric machine. The power modules may be of the same dimensions, same electrical interfaces, and/or same power output (e.g., type, magnitude) as each other to enable the interchangeability of the power modules. The power modules may be ones that generate power or ones that store energy. In some cases, the generating power modules may charge the energy storage power modules, while the energy storage power modules power the electric machine.