Drive system and control method for drive system
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United States of America Patent
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May 14, 2019
Grant Date -
Jun 21, 2018
app pub date -
Oct 26, 2017
filing date -
Dec 20, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A controller is configured to, while the step-up converter is being controlled in a state where a duty ratio of an on state of an upper arm that is any one of the two switching elements is set to 100% such that the step-up converter does not perform a step-up operation, when a modulation factor of the inverter in voltage modulation exceeds a predetermined modulation factor lower than a step-up command issuance modulation factor at which a step-up command is issued to the step-up converter or when a target voltage at the side of the inverter based on a target operating point of the electric motor exceeds a predetermined voltage lower than the voltage at the side of the electrical storage device, reduce the duty ratio of the on state of the upper arm from 100%.
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