Power management of electrical vehicles using range extending turbines
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United States of America Patent
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Nov 3, 2020
Grant Date -
N/A
app pub date -
Feb 2, 2018
filing date -
Feb 3, 2017
priority date (Note) -
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Abstract
Provided are drivetrain systems of electrical vehicles comprising range extending turbines operable to dissipate some or all power generated by electrical drive motor-generators coupled to vehicle wheels. Also provided are methods of operating such systems. Power dissipation using turbines may be used, for example, when batteries cannot be further charged because of their current state of charge or some other conditions. This turbine power dissipation effectively extends engine braking capabilities of electrical vehicles and reduces operation of friction brakes. The power generated by an electrical drive motor-generator may depend on various limits, such as a vehicle deceleration limit, traction limit, power generation limit, and power receiving limit. Specifically, the electrical power is generated at a level when at least one of these limits is reached but neither is exceeded. Furthermore, the power generation level is continuously and dynamically controlled based on changes in operating conditions.
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