Back to results
US 12,565,884 B2Granted
Hydraulic system control
AssigneeEaton Intelligent Power Limited
InventorsDerek Paul Dougherty, Jay Manoj Padgilwar, Sauradeep Datta, Aniket Devendra Sachdeva
Life of this patent
Estimating the term…
Abstract
A hydraulic system includes a hydraulic pump and a motor configured to drive the hydraulic pump. A sensor measures motor speed. A controller includes a model configured to determine system parameters based on the measured motor speed, and the controller is configured to output control signals to the motor and a fan based on the determined system parameters.
Claims17
A hydraulic system, comprising:
- a hydraulic pump,
- a motor configured to drive the hydraulic pump;
- a sensor configured to determine a speed of the motor;
- a cooling system including a fan;
- and
- a controller including a model configured to determine hydraulic system parameters based on the determined speed of the motor, wherein the controller is configured to output control signals to the motor and the cooling system based on the determined hydraulic system parameters, wherein the controller is configured to select a passive freewheeling mode or an active freewheeling mode based on the determined speed of the motor, and wherein the controller is configured to vary a speed of the fan based on whether the active freewheeling mode or the passive freewheeling is selected.
3 more elements
A thermal control system, comprising:
- a sensor configured to measure a speed of a motor;
- a motor controller configured to:
- receive the measured speed of the motor;
- output PWM control signals to the motor to selectively implement active freewheeling or passive freewheeling based on the measured speed of the motor;
- and
- control a fan of a cooling system based on the selected active freewheeling or the passive freewheeling.
3 more elements
A method, comprising:
- receiving a signal indicating a speed of a motor by a controller;
- comparing the speed of the motor to a predetermined speed;
- outputting control signals by the controller to implement an active freewheeling control of the motor if the speed of the motor is greater than the predetermined limit-speed;
- implementing a passive freewheeling control of the motor if the speed of the motor is not greater than the predetermined limit speed;
- and
- varying a cooling fan speed by the controller based on the implemented active freewheeling control or the implemented passive freewheeling control.
3 more elements
Dependencies are inferred from the claim text.