Hydrostatic transmission assembly and system
AssigneeProject Phoenix, LLC
InventorThomas Afshari
Life of this patent
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Abstract
A hydrostatic transmission system includes a hydraulic motor and at least one proportional control valve and at least one pump connected to the hydraulic motor to provide fluid to operate the hydraulic motor. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The hydrostatic transmission system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the hydrostatic transmission system to an operational set point.
Claims17
A hydraulic system comprising:
- a hydraulic motor;
- a hydraulic pump assembly connected to the hydraulic motor, the hydraulic pump assembly including a hydraulic pump having a first fluid driver with a first variable torque motor and a first gear having a plurality of first gear teeth, and a second fluid driver with a second variable torque motor and a second gear having a plurality of second gear teeth;
- and
- a controller that is configured to:
- receive feedback data from each variable torque motor,
- control a torque of each variable torque motor to transfer the hydraulic fluid to the hydraulic motor, and
- synchronize rotation rates to generate a contact force between the first and second gears of the hydraulic pump,
- wherein the controller includes a plurality of operational modes including at least one of a flow mode, a pressure mode, or a balanced mode.
A hydraulic system comprising:
- a hydraulic motor;
- a hydraulic pump assembly connected to the hydraulic motor, the hydraulic pump assembly including a hydraulic pump having a first fluid driver with a first variable torque motor and a first gear having a plurality of first gear teeth, and a second fluid driver with a second variable torque motor and a second gear having a plurality of second gear teeth;
- and
- a controller that is configured to:
- receive feedback data from each variable torque motor,
- control a torque of each variable torque motor to transfer the hydraulic fluid to the hydraulic motor, and
- synchronize rotation rates to generate a contact force between the first and second gears of the hydraulic pump,
- wherein the controller includes one or more curves for the hydraulic pump that convert command signals to appropriate torque demand signals to the hydraulic pump based on the design of the hydraulic pump.
A hydraulic system comprising:
- a hydraulic motor;
- a hydraulic pump assembly connected to the hydraulic motor, the hydraulic pump assembly including a hydraulic pump having a first fluid driver with a first variable torque motor and a first gear having a plurality of first gear teeth, and a second fluid driver with a second variable torque motor and a second gear having a plurality of second gear teeth;
- and
- a controller that is configured to:
- receive feedback data from each variable torque motor,
- control a torque of each variable torque motor to transfer the hydraulic fluid to the hydraulic motor, and
- synchronize rotation rates to generate a contact force between the first and second gears of the hydraulic pump,
- wherein the first motor is disposed inside the first gear and the second motor is disposed inside the second gear, and
- wherein the first motor and the second motor are outer-rotor motors.
Dependencies are inferred from the claim text.