Vehicle system for evaluating a voltage converter
First Claim
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1. A vehicle comprising:
- an electric machine configured to provide drive torque;
a storage device for supplying power to the electric machine;
a variable voltage converter (VVC) connected between the storage device and the electric machine; and
a controller configured to;
receive input indicative of a VVC input current and a VVC output voltage,selectively disable drive torque and provide output indicative of a specific defective solid state VVC component responsive to the input,provide a control signal indicative of an intermediate boost voltage command, wherein the intermediate boost voltage command corresponds to an intermediate voltage value that is greater than a storage device voltage value and less than a boost voltage value,provide output indicative of an open circuit within a first transistor of the VVC when the VVC output voltage corresponds to the boost voltage value in response to the intermediate boost voltage command, anddisable VVC boost in response to the output by controlling the VVC to allow power to pass from the storage device to the electric machine without boosting the intermediate voltage value.
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Abstract
A vehicle is provided with an electric machine and a storage device. The electric machine is configured to provide drive torque and the storage device is configured to supply power to the electric machine. The vehicle includes a variable voltage converter (VVC) that is connected between the storage device and the electric machine. The vehicle also includes a controller that is configured to receive input indicative of a VVC input current and a VVC output voltage. The controller is further configured to selectively disable drive torque responsive to the input.
13 Citations
17 Claims
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1. A vehicle comprising:
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an electric machine configured to provide drive torque; a storage device for supplying power to the electric machine; a variable voltage converter (VVC) connected between the storage device and the electric machine; and a controller configured to; receive input indicative of a VVC input current and a VVC output voltage, selectively disable drive torque and provide output indicative of a specific defective solid state VVC component responsive to the input, provide a control signal indicative of an intermediate boost voltage command, wherein the intermediate boost voltage command corresponds to an intermediate voltage value that is greater than a storage device voltage value and less than a boost voltage value, provide output indicative of an open circuit within a first transistor of the VVC when the VVC output voltage corresponds to the boost voltage value in response to the intermediate boost voltage command, and disable VVC boost in response to the output by controlling the VVC to allow power to pass from the storage device to the electric machine without boosting the intermediate voltage value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle system comprising:
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a variable voltage converter (VVC) connected between a battery and an electric machine; and at least one controller configured to; receive input indicative of at least one of a VVC input current and a VVC output voltage, provide a control signal indicative of an intermediate boost voltage command, wherein the intermediate boost voltage command corresponds to an intermediate voltage value that is greater than a battery voltage value and less than a boost voltage value, provide output indicative of at least one of an open circuit within a first transistor of the VVC and a defective gate drive circuit communicating with the first transistor, when the VVC output voltage corresponds to the boost voltage value in response to the intermediate boost voltage command, and disable VVC boost in response to the output by controlling the VVC to allow power to pass from the battery to the electric machine without boosting the intermediate voltage value. - View Dependent Claims (8, 9, 10, 11)
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12. A variable voltage converter (VVC) evaluation method comprising:
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receiving input indicative of a VVC input current and a VVC output voltage; and providing output indicative of an open circuit within a second diode of the VVC, when the VVC input current step changes to approximately zero Amps in response to an intermediate boost voltage command corresponding to an intermediate boost voltage greater than a battery voltage value and less than a boost voltage value. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification