System and method for controlling electrically driven accessories
First Claim
1. A vehicle comprising:
- a power source;
a controller configured to receive information regarding a mode of operation of the vehicle;
a converter configured to receive a first voltage from the power source and to convert the first voltage to a second voltage;
an accessory having an electric motor;
an auxiliary inverter system electrically coupled to an output of the converter and to the accessory having the electric motor, the auxiliary inverter system configured to convert the second voltage received from the converter for powering the electric motor; and
a first communication link between the controller and the auxiliary inverter system, the first communication link allowing the controller to command the auxiliary inverter system to control a speed of the electric motor in the state commensurate with the mode of operation of the vehicle;
wherein the auxiliary inverter system is further configured, responsive to interruption of the first communication link, to control a speed of the electric motor based on a level of the second voltage received from the converter to maintain operation of the accessory.
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Accused Products
Abstract
A vehicle includes a power source, a controller, a converter configured to receive a first voltage from the power source and to convert the first voltage to a second voltage, an auxiliary inverter system electrically coupled to an output of the converter and to an accessory having an electric motor, the auxiliary inverter system configured to convert the second voltage received from the converter for powering the electric motor, and a first communication link between the controller and the auxiliary inverter system. The auxiliary inverter system is further configured, responsive to interruption of the first communication link, to control a speed of the electric motor based on a level of the second voltage.
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Citations
30 Claims
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1. A vehicle comprising:
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a power source; a controller configured to receive information regarding a mode of operation of the vehicle; a converter configured to receive a first voltage from the power source and to convert the first voltage to a second voltage; an accessory having an electric motor; an auxiliary inverter system electrically coupled to an output of the converter and to the accessory having the electric motor, the auxiliary inverter system configured to convert the second voltage received from the converter for powering the electric motor; and a first communication link between the controller and the auxiliary inverter system, the first communication link allowing the controller to command the auxiliary inverter system to control a speed of the electric motor in the state commensurate with the mode of operation of the vehicle; wherein the auxiliary inverter system is further configured, responsive to interruption of the first communication link, to control a speed of the electric motor based on a level of the second voltage received from the converter to maintain operation of the accessory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a controller configured to receive information regarding an operational mode of a machine; an accessory configured to operate in a state that is commensurate with the operational mode of the machine, the accessory receiving power from a power source; at least one communication link between the controller and accessory, the link commanding the accessory to operate in a state commensurate with the operational mode of the machine; and wherein if the at least one communication link is interrupted, the accessory can select and operate at a state commensurate with an operational mode of the machine based on a level of power received from the power source. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A system comprising:
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a controller; a converter configured to receive a first voltage from a power source and step down the first voltage to a lower, secondary voltage, the secondary voltage being indicative of an operational mode of a machine; at least one auxiliary inverter electrically coupled to the converter and to an accessory having an electric motor, the auxiliary inverter receiving the secondary voltage; a first communication link between the controller and the auxiliary inverter; a second communication link between the controller and the converter; and wherein if one of the communication links is interrupted, the accessory will continue to operate at a level commensurate with the operational mode of the machine based on the secondary voltage. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method comprising:
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selecting a secondary voltage provided by a converter based on an operational mode of a machine, the machine including at least one accessory having an electric motor; providing the secondary voltage to an auxiliary inverter electrically coupled to the accessory; and operating the accessory at a level commensurate with the operational mode of the machine in the event that a communication link between the controller and the auxiliary inverter is interrupted or a communication link between the controller and the converter is interrupted.
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Specification