High-voltage bus discharge with logarithmic self-protection
First Claim
1. A method for controlling a discharge circuit coupled to a high-voltage bus, wherein the discharge circuit is activated such that current flows from the high-voltage bus through the discharge circuit, the method comprising:
- determining a first discharge time based on a first voltage level of the high-voltage bus;
obtaining a second voltage level of the high-voltage bus after the first discharge time; and
deactivating the discharge circuit if a difference between the first voltage level and the second voltage level is less than a threshold value.
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Abstract
Systems and methods for discharging a high-voltage bus coupled to a discharge circuit are provided. A method comprises obtaining a first voltage level of the high-voltage bus. The method further comprises determining a first discharge time based on the first voltage level and activating the discharge circuit. The method further comprises obtaining a second voltage level of the high-voltage bus after the first discharge time, comparing the first voltage level and the second voltage level, and deactivating the discharge circuit if a difference between the first voltage level and the second voltage level is less than a threshold value.
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Citations
20 Claims
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1. A method for controlling a discharge circuit coupled to a high-voltage bus, wherein the discharge circuit is activated such that current flows from the high-voltage bus through the discharge circuit, the method comprising:
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determining a first discharge time based on a first voltage level of the high-voltage bus; obtaining a second voltage level of the high-voltage bus after the first discharge time; and deactivating the discharge circuit if a difference between the first voltage level and the second voltage level is less than a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 19)
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8. A method for discharging a high-voltage bus coupled to a discharge circuit, the method comprising:
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obtaining a first voltage level of the high-voltage bus; determining a first discharge time based on the first voltage level; activating the discharge circuit for the first discharge time; obtaining a second voltage level of the high-voltage bus after the first discharge time; comparing the first voltage level and the second voltage level; and deactivating the discharge circuit if a difference between the first voltage level and the second voltage level is less than a threshold value. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A vehicle protection system for a high-voltage capacitor bank coupled to a high-voltage bus, the vehicle protection system comprising:
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a discharge circuit coupled to the high-voltage bus; and a discharge controller coupled to the high-voltage bus and the discharge circuit, the discharge controller being configured to; activate the discharge circuit; determine a first discharge time based on a first voltage level of the high-voltage bus; obtain a second voltage level of the high-voltage bus after the first discharge time; and deactivate the discharge circuit if a difference between the first voltage level and the second voltage level of the high-voltage bus is less than a threshold value. - View Dependent Claims (15, 16, 17, 18, 20)
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Specification