Thermal protection method and system to maximize availability of electric drive system
First Claim
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1. An electric drive system comprising:
- a plurality of heat sensitive components;
a plurality of temperature sensors in temperature communication with heat sensitive components;
a system controller having a processor in bilateral communication with a reference unit;
wherein the system controller continually receives temperature signals from the temperature sensors;
wherein, if one of the temperature signals presents a temperature above a respective threshold temperature for a particular heat sensitive component, then;
the system controller receives a threshold exceed signal;
the processor interacts with the reference unit to determine a type and magnitude of performance reduction to reconcile the threshold exceed signal; and
the processor causes the system controller to produce a reduced performance command for performance reduction of the drive system.
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Abstract
An electric drive system may include a plurality of heat sensitive components, at least one temperature sensor positioned in or on each of the components and a system controller. The temperature sensors may be interconnected with the system controller to transmit temperature data from their respective heat sensitive components to the system controller. The system controller may be configured to transmit a reduced performance command in the event that a reached-temperature-threshold-limit signal is received from any one or more of the temperature sensors. System shutdown due to over temperature faults may be avoided.
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Citations
20 Claims
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1. An electric drive system comprising:
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a plurality of heat sensitive components; a plurality of temperature sensors in temperature communication with heat sensitive components; a system controller having a processor in bilateral communication with a reference unit; wherein the system controller continually receives temperature signals from the temperature sensors; wherein, if one of the temperature signals presents a temperature above a respective threshold temperature for a particular heat sensitive component, then; the system controller receives a threshold exceed signal; the processor interacts with the reference unit to determine a type and magnitude of performance reduction to reconcile the threshold exceed signal; and the processor causes the system controller to produce a reduced performance command for performance reduction of the drive system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electric drive system comprising:
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a rectifier; a controller/inverter; a gearbox; a motor; a system controller having a processor in bilateral communication with a reference unit; wherein the system controller continually receives temperature signals from the rectifier, controller/inverter, gearbox, and motor; wherein, if one of the temperature signals presents a temperature above a respective threshold temperature for one of the rectifier, controller/inverter, gearbox, and motor, then; the system controller receives a threshold exceed signal; the processor interacts with the reference unit to determine a type and magnitude of performance reduction to reconcile the threshold exceed signal; and the processor causes the system controller to produce a reduced performance command for performance reduction of the drive system. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for operating an electric taxi system comprising the steps of:
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establishing temperature threshold limits for a plurality of heat sensitive components of the electric taxi system; wherein the heat sensitive components includes a motor having a bearing; continually receiving temperature signals from the bearing; wherein, if one of the temperature signals presents a temperature above a threshold temperature for the bearing, then; generating a threshold exceed signal; determining a type and magnitude of performance reduction to reconcile the threshold exceed signal; and producing a reduced performance command for performance reduction of the motor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification