Vehicular electrical system and method for controlling an inverter during motor deceleration
First Claim
1. A method for operating an inverter having a plurality of high switches and a plurality of low switches coupled to an electric motor, the method comprising:
- detecting an event indicative of deceleration of the electric motor; and
alternating the inverter between a first mode of operation and a second mode of operation during the deceleration of the electric motor,wherein in the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated, and in the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated.
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Accused Products
Abstract
Methods and systems for operating an inverter having a plurality of high switches and a plurality of low switches coupled to an electric motor are provided. An event indicative of deceleration of the electric motor is detected. The inverter is alternated between a first mode of operation and a second mode of operation during the deceleration of the electric motor. In the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated. In the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated.
31 Citations
20 Claims
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1. A method for operating an inverter having a plurality of high switches and a plurality of low switches coupled to an electric motor, the method comprising:
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detecting an event indicative of deceleration of the electric motor; and alternating the inverter between a first mode of operation and a second mode of operation during the deceleration of the electric motor, wherein in the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated, and in the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an inverter having a plurality of pairs of switches, each of the plurality of pairs of switches comprising a high switch and a low switch, coupled to an automotive traction motor, the method comprising:
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detecting an event indicative of deceleration of the automotive traction motor; alternating the inverter between a first mode of operation and a second mode of operation during the deceleration of the automotive traction motor if a back electromotive force, EMF, generated by the automotive traction motor is above a predetermined threshold, wherein in the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated, and in the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated; and deactivating each of the plurality of high switches and each of the plurality of low switches if the back EMF generated by the automotive traction motor is below the predetermined threshold. - View Dependent Claims (12, 13, 14, 15)
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16. An automotive propulsion system comprising:
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an electric motor comprising a plurality of windings; a direct current-to-alternating current, DC/AC, power inverter comprising a plurality of pairs of power switching devices coupled to the plurality of windings, each pair of power switching devices comprising a high power switching device and a low power switching device; a processing system in operable communication with the electric motor and the DC/AC power inverter, the processing system being configured to detect an event indicative of deceleration of the electric motor; and alternate the inverter between a first mode of operation and a second mode of operation during the deceleration of the electric motor, wherein in the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated, and in the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated. - View Dependent Claims (17, 18, 19, 20)
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Specification