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US 12,597,620 B2Granted
Fuel cell system having an air compressor and a driving control method for a motor of the air compressor
AssigneesHyundai Motor Company, Kia Corporation
InventorMin Gu Park
Life of this patent
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Abstract
A driving control method for a motor of an air compressor is provided and includes: controlling driving of the motor based on a speed command for the motor of the air compressor and a current rotational speed of the motor; and controlling driving of the motor based on the speed command and an expected rotational speed of the motor when an anomaly occurs in determining the current rotational speed. In particular, the expected rotational speed is determined based on a rotational speed map regarding the motor, an air flow rate sensing value and an air pressure sensing value.
Claims8
A fuel cell system comprising:
- a fuel cell stack;
- an air compressor comprising a motor such that introduced air is compressed and supplied to the fuel cell stack;
- a first controller configured to estimate a current rotational speed of the motor based on a counter electromotive force of the motor and control driving of the motor, wherein when an abnormality is detected in determining the current rotational speed, the first controller is configured to control driving of the motor based on a speed command and an expected rotational speed of the motor;
- and
- a second controller configured to transmit the speed command and the expected rotational speed to the first controller, wherein the second controller is configured to determine the expected rotational speed based on a rotational speed map regarding the motor, an air flow rate sensing value and an air pressure sensing value.
2 more elements
Dependencies are inferred from the claim text.