Control strategy for an electric machine in a vehicle
First Claim
Patent Images
1. A vehicle comprising:
- a traction battery;
a high-voltage bus;
an electric machine;
a variable voltage converter electrically coupled between the battery and the bus to convert a traction battery voltage to a high-voltage bus voltage; and
a controller configured to, in response to an indication that a measured voltage signal of the bus is faulty, alter the high-voltage bus voltage based on a substituted battery voltage signal such that the electric machine remains operable for a drive cycle.
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Abstract
A hybrid-electric vehicle and method of controlling a hybrid-vehicle is provided. The vehicle includes a traction battery, at least one electric-machine, and a controller. The controller is configured to alter a voltage between the battery and the electric-machine based on a measured voltage of the battery or the high voltage bus. In response to an indication that the measured voltage is faulty during a drive cycle, the controller instead alters the voltage between the battery and the electric machine based on a substituted battery voltage signal such that the electric-machine remains operable for the drive cycle.
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Citations
15 Claims
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1. A vehicle comprising:
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a traction battery; a high-voltage bus; an electric machine; a variable voltage converter electrically coupled between the battery and the bus to convert a traction battery voltage to a high-voltage bus voltage; and a controller configured to, in response to an indication that a measured voltage signal of the bus is faulty, alter the high-voltage bus voltage based on a substituted battery voltage signal such that the electric machine remains operable for a drive cycle. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle comprising:
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a traction battery; a high-voltage bus to provide a high-voltage-bus voltage to least one electric machine; and a controller configured to; alter the high-voltage-bus voltage between the battery and the electric machine based on a measured voltage signal of the high-voltage bus; and in response to an indication that the measured voltage signal is faulty, alter the high-voltage-bus voltage between the battery and the electric machine based on a substituted battery voltage signal such that the electric machine remains operable for a drive cycle. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method of controlling comprising:
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varying a voltage between a traction battery and an electric machine based on a measured voltage signal of a high-voltage bus; in response to an indication that the measured voltage signal is faulty during a drive cycle, substituting an alternate voltage signal; and varying the voltage between the battery and the electric machine based on the alternate voltage signal such that the electric machine remains operable for the drive cycle. - View Dependent Claims (13, 14, 15)
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Specification