STEADY-STATE AND TRANSITORY CONTROL FOR TRANSMISSION BETWEEN ENGINE AND ELECTRICAL POWER GENERATOR
First Claim
1. A system for transmitting a variable output of a variable source of mechanical power into an input having a desired apparatus speed value for an apparatus, the system comprising:
- a transmission receiving the variable output and producing the input, the transmission defining a transmission ratio between a first speed of the output and a second speed of the input;
a first sensor measuring the first speed and producing first speed data corresponding thereto;
a second sensor measuring the second speed and producing second speed data corresponding thereto;
a third sensor measuring a power demand of the apparatus and producing power demand data corresponding thereto;
a ratio set point controller receiving the first and second speed data and the power demand data, the ratio set point controller calculating an available power of the source and a stability level of the system as a function of the first speed data and the power demand data, determining a desired source speed value for the first speed as a function of the power demand, calculating a desired ratio value for the transmission ratio as a function of the desired source speed value, and determining a desired rate of change for the transmission ratio as a function of the stability level of the system;
a ratio controller interfacing the ratio set point controller to the transmission, the ratio controller actuating the transmission to change the transmission ratio to the desired ratio value following the desired rate of change; and
a source speed controller receiving the second speed data from the second sensor and changing the first speed until the second speed data corresponds to the desired apparatus speed value.
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Accused Products
Abstract
A system for transforming a variable output into an input having a desired speed value, including a transmission receiving the output having a first speed (Ve) and producing the input having a second speed (Vgen), first, second and third sensors producing data corresponding to the first speed (Ve), second speed (Vgen) and a power demand (Pdem) for the input, a ratio set point controller, a ratio controller and a speed controller. The ratio set point controller receives the data and calculates an available power (Pav), a stability level of the system (S,U1,U2), a desired value for the first speed (Ve), and a desired value and rate of change for the transmission ratio. The ratio controller interfaces the ratio set point controller and actuates the transmission to change the transmission ratio to the desired value following the desired rate of change. The speed controller changes the first speed (Ve) until the second speed (Vgen) corresponds to the desired speed value.
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Citations
16 Claims
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1. A system for transmitting a variable output of a variable source of mechanical power into an input having a desired apparatus speed value for an apparatus, the system comprising:
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a transmission receiving the variable output and producing the input, the transmission defining a transmission ratio between a first speed of the output and a second speed of the input; a first sensor measuring the first speed and producing first speed data corresponding thereto; a second sensor measuring the second speed and producing second speed data corresponding thereto; a third sensor measuring a power demand of the apparatus and producing power demand data corresponding thereto; a ratio set point controller receiving the first and second speed data and the power demand data, the ratio set point controller calculating an available power of the source and a stability level of the system as a function of the first speed data and the power demand data, determining a desired source speed value for the first speed as a function of the power demand, calculating a desired ratio value for the transmission ratio as a function of the desired source speed value, and determining a desired rate of change for the transmission ratio as a function of the stability level of the system; a ratio controller interfacing the ratio set point controller to the transmission, the ratio controller actuating the transmission to change the transmission ratio to the desired ratio value following the desired rate of change; and a source speed controller receiving the second speed data from the second sensor and changing the first speed until the second speed data corresponds to the desired apparatus speed value. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a variable transmission transforming a variable output of a variable source of mechanical power into an input having a desired speed value for an apparatus, the method comprising the steps of:
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obtaining a first speed of the variable output, a second speed of the input, and a power demand of the apparatus; calculating (1) an available power based on the first speed and the power demand, (2) a stability—
level of the input of the apparatus based on the first speed and the available power, (3) a desired ratio of the transmission based on the power demand, and (4) a desired rate of ratio change based on the stability level;instructing the transmission to change to the desired ratio at the desired rate of ratio change; and varying the first speed until the second speed is substantially equal to the desired speed value. - View Dependent Claims (7, 8)
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9. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic that selects a rate at which the ratio of the continuously variable transmission is to be progressively varied, wherein in use the ratio of the continuously variable transmission can be varied at different rates. - View Dependent Claims (10, 11, 12, 13)
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14. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio at a rate that is dependent on the rate at which the electrical power demand of the load varies.
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15. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic selects a rate at which the ratio of the continuously variable transmission is to be progressively varied among a range of rates.
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16. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic to determine a target ratio that the continuously variable transmission is to acquire, the electronic control sending control signals to the continuously variable transmission to progressively change its ratio from a current ratio to the target ratio at a rate at which the ratio of the continuously variable transmission is to be progressively varied, wherein in use the ratio of the continuously variable transmission can be varied at different rates.
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Specification