Motor Vehicle Electrical System Having An Active Bridge Rectifier And Overvoltage Protection During A Load Dump, Rectifier System, Associated Operating Method And Means For Its Implementation
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Accused Products
Abstract
A vehicle electrical system includes: an active bridge rectifier which is connected to a generator via multiple phase terminals, and having terminals on the direct voltage side; a unit for recognizing load shedding at the active bridge rectifier and short-circuiting the phase terminals in a clocked manner, as the result of which a pulsed current is fed to the vehicle electrical system; a vehicle electrical system capacitor configured for smoothing the pulsed current; and a voltage limiting unit configured for clipping a voltage between the terminals of the bridge rectifier on the direct voltage side to a predefined maximum voltage.
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Citations
29 Claims
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1-15. -15. (canceled)
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16. A vehicle electrical system, comprising:
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an active bridge rectifier connected to a generator via multiple phase terminals, the active bridge rectifier having terminals on the direct voltage side; a load shedding recognition unit which (i) recognizes load shedding at the active bridge rectifier, and (ii) when load shedding is recognized, short-circuits the phase terminals in a clocked manner to feed a pulsed current to the vehicle electrical system; at least one vehicle electrical system capacitor which smoothes the pulsed current; and a voltage limiter which clips a voltage between the terminals of the bridge rectifier on the direct voltage side to a predefined maximum voltage. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for operating a vehicle electrical system which includes (i) an active bridge rectifier connected to a generator via multiple phase terminals, the active bridge rectifier having terminals on the direct voltage side, (ii) a load shedding recognition unit, (iii) at least one vehicle electrical system capacitor, and (iv) a voltage limiter, the method comprising:
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ascertaining, by the load shedding recognition unit, an occurrence of load shedding at the active bridge rectifier; upon ascertaining an occurrence of load shedding at the active bridge rectifier, short-circuiting the phase terminals by the load shedding recognition unit in a clocked manner to feed a pulsed current to the vehicle electrical system; smoothing, using the at least one vehicle electrical system capacitor, the pulsed current; and clipping, using the voltage limiter, a voltage which is present between the terminals of the bridge rectifier on the direct voltage side to a predefined maximum voltage. - View Dependent Claims (26, 27, 28)
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29. A non-transitory computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, performs a method for operating a vehicle electrical system which includes (i) an active bridge rectifier connected to a generator via multiple phase terminals, the active bridge rectifier having terminals on the direct voltage side, (ii) a load shedding recognition unit, (iii) at least one vehicle electrical system capacitor, and (iv) a voltage limiter, the method comprising:
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ascertaining, by the load shedding recognition unit, an occurrence of load shedding at the active bridge rectifier; upon ascertaining an occurrence of load shedding at the active bridge rectifier, short-circuiting the phase terminals by the load shedding recognition unit in a clocked manner to feed a pulsed current to the vehicle electrical system; smoothing, using the at least one vehicle electrical system capacitor, the pulsed current; and clipping, using the voltage limiter, a voltage which is present between the terminals of the bridge rectifier on the direct voltage side to a predefined maximum voltage.
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Specification