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US 10,254,733 B2Granted
Motor control device
AssigneeHitachi Automotive Systems, Ltd.
InventorsTatsuya Hatakeyama, Hiroaki Igarashi, Hideyuki Sakamoto
Life of this patent
Estimating the term…
Abstract
A motor control device avoids the difficulties associated with safely controlling a motor using a second calculation unit when a first calculation unit malfunctions. A motor control device monitors a malfunction of a first microcomputer and a malfunction of a first CPU of the first microcomputer and performs a determination based on a result of a second external communication functional unit. When the determination is normal, the process proceeds determine that the first CPU is normal and a second CPU malfunctions. Therefore, it is possible to continue processing using the first CPU in this case.
Claims9
A motor control device comprising:
- an integrated control unit that receives information relating to a malfunction from a first microcomputer and a second microcomputer and controls a motor,
- wherein the first microcomputer includes a first CPU, a second CPU which has a first self-diagnosis functional unit, and a first internal communication functional unit which detects a malfunction of the first CPU through communication from the second CPU to the first CPU,
- the second microcomputer is a multi-core microcomputer which includes a third CPU and a fourth CPU and a second external communication functional unit which detects a malfunction of the first microcomputer through communication from the third CPU to the first microcomputer,
- the fourth CPU having a second self-diagnosis functional unit, and a second internal communication functional unit which detects a malfunction of the third CPU through communication from the fourth CPU to the third CPU,
- the first microcomputer includes a first external communication functional unit which detects the malfunction of the third CPU of the second microcomputer through communication from the first CPU to the second microcomputer,
- the integrated control unit monitors the malfunction of the first CPU based on each malfunction detection result of the first internal communication functional unit and the second external communication functional unit even when the first self-diagnosis functional unit determines that the second CPU malfunctions in the first microcomputer, and continues processing of the first CPU based on a result of the monitoring, and
- the integrated control unit monitors the malfunction of the third CPU based on each malfunction detection result of the second internal communication functional unit and the first external communication functional unit even when the second self-diagnosis functional unit determines that the fourth CPU malfunctions in the second microcomputer, and continues processing of the third CPU based on a result of the monitoring.
4 more elements
A motor control device comprising:
- an integrated control unit that receives information relating to a malfunction from a first microcomputer and a second microcomputer and controls a motor,
- wherein the first microcomputer includes a first CPU, a second CPU which has a first self-diagnosis functional unit, and a first internal communication functional unit which detects a malfunction of the first CPU through communication from the second CPU to the first CPU,
- the second microcomputer is a multi-core microcomputer which includes a third CPU and a fourth CPU and a second external communication functional unit which detects a malfunction of the first microcomputer through communication from the third CPU to the first microcomputer,
- the fourth CPU having a second self-diagnosis functional unit, and a second internal communication functional unit which detects a malfunction of the third CPU through communication from the fourth CPU to the third CPU,
- the integrated control unit monitors the malfunction of the first CPU based on each malfunction detection result of the first internal communication functional unit and the second external communication functional unit even when the first self-diagnosis functional unit determines that the second CPU malfunctions in the first microcomputer, and continues processing of the first CPU based on a result of the monitoring,
- the second external communication functional unit detects a malfunction of the fourth CPU by performing communication between the first CPU and the fourth CPU,
- the first microcomputer includes a first external communication functional unit which detects the malfunction of the fourth CPU of the second microcomputer through communication from the first CPU to the second microcomputer, and
- the integrated control unit monitors the malfunction of the fourth CPU based on each malfunction detection result of the second internal communication functional unit and the first external communication functional unit even when the second self-diagnosis functional unit determines that the fourth CPU malfunctions in the second microcomputer, and continues processing of the fourth CPU based on a result of the monitoring.
5 more elements
Dependencies are inferred from the claim text.