An integrated apparatus and method is disclosed for controlling a fluid pump and a valve connected to a coolant loop. The fluid pump for circulating fluid through the coolant loop and the valve positionable between a first and a second position. A controller generates control signals that are transmitted to the fluid pump and to the valve for regulating the speed of the fluid pump and the flow of the fluid circulating through the coolant loop and to position the valve into either the first or the second position.

A system for operating at least a pair of pumps using a driver. The driver can be coupled to a first portion of a first drive shaft that is not positioned in within an interior area of a thermal fluid tank of a first thermal circuit. A magnetic coupling can couple the first portion to a second portion of the first drive shaft that is within the thermal fluid tank. Rotational displacement of the first portion of the first drive shaft can be translated, via the magnetic coupling, to the second portion of the first drive shaft to drive a first fluid pump. The first portion of the first drive shaft can also be coupled to a second drive shaft by a clutch, the second drive shaft being used to operate a second fluid pump that provides a force for circulating a second thermal fluid of a second thermal circuit.

Methods and systems for an electric drive unit. The electric drive unit includes, in one example, a stator assembly with a first set of stator windings and a second set of stator windings, a first set of rotors each configured to electromagnetically interact with the first set of stator windings and rotationally couple to a distinct gear in a first summation gear set. The electric drive unit further includes a second set of rotors configured to electromagnetically interact with the second set of stator windings and rotationally couple to a distinct gear in a second summation gear set. The electric drive unit further includes a first inverter and a second inverter both electrically coupled to the stator assembly and in the drive unit the first inverter and the second inverter are configured to independently control speeds of the first set of rotors and the second set of rotors, respectively.

The invention relates to a drive system (100) for a mobile work machine, the drive system (100) including a hydrostatic drive module including at least one hydrostatic pump (101) connected to at least one hydrostatic motor (102), the hydrostatic motor (102) being coupled to at least one driving wheel (5a) of the mobile work machine in order to rotate the at least one driving wheel (5a), and at least two electric motors (105, 106) for driving the hydrostatic pump (101), the two electric motors (105, 106) and the hydrostatic pump (101) being mounted in series on a common main shaft (104) for synchronous rotation thereof.

A hydraulic system for a vehicle is provided. The hydraulic system includes a first electric motor, a second electric motor, a gearbox arranged to be driven by the first and second electric motors, a hydraulic pump arranged to be driven by the gearbox, and a control arrangement configured to individually control the first and second electric motors to either run at a reference speed or to deliver a reference torque and during operation control at least one of the first and second electric motors to deliver a reference torque.