Electric automotive vehicle control apparatus

• US 5,832,395 A
• Filed: 07/26/1996
• Issued: 11/03/1998
• Est. Priority Date: 07/26/1995
• Status: Expired due to Fees

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Takeda, Toshihiko, Egami, Tsuneyuki
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): ARTHUR JEANGLAUDE, GERTRUDE
• Application Number:
  US08/687,948
• Time in Patent Office: 830 Days
• Field of Search: 701/22, 701/29, 701/30, 701/31, 701/32, 701/33, 701/34, 701/50, 701/43, 701/39, 701/81, 180/79.1, 180/415, 180/422, 180/443, 318/52, 318/135, 318/139, 318/161, 318/587
• US Class Current: 701/22
• CPC Class Codes: B60L 15/025 using field orientation; Vector control; Direct Torque Control [DTC]
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/429 Current
• CPC Class Codes: B60L 2240/529 Current
• CPC Class Codes: B60L 3/0092 with use of redundant elements for safety purposes
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

One central processing unit 63 is connected to the other central processing unit 64 via a communication line 200. Various data, such as driving operational information, actuation commands, and driving conditional information, are exchanged and compared between two central processing units 63 and 64 through a communication line 200. If any disagreement is found in the comparison result, a current supply circuit 65 stops supplying current to a driving motor 1.

Claims

1. An electric vehicle control apparatus comprising:

a rotational information detecting means for detecting rotational information of a driving motor;

a driving operational information detecting means for detecting driving operational information of the electric vehicle;

a current detecting means for detecting line currents flowing through the driving motor;

a driving condition detecting means for detecting driving conditional information of the driving motor based on the line currents detected by said current detecting means; and

a plurality of central processing units each having a calculating means and a driving condition confirming means, said calculating means receiving said rotational information and said driving operational information and calculating an actuation command of the driving motor based on said rotational information and said driving operational information, said driving condition confirming means receiving said driving conditional information and confirming a driving condition of the driving motor, wherein

said actuation command is sent from one central processing unit to a current supply means connected to supply current for the driving motor,

said plural central processing units are connected via a communication line, to exchange data relating to a least one of said driving operational information, said actuation command and said driving conditional information between said plural central processing units via said communication line, and

an operation selecting means is provided in each of said plural central processing units for comparing the information exchanged between said plural central processing units and for making a judgment as to whether the current supply means should be continuously operated or deactivated.

2. The electric vehicle control apparatus in accordance with claim 1, wherein

said central processing units further comprise an estimating means for estimating an expected operational condition of the driving motor based on the actuation command,

said driving condition confirming means compares said expected operational condition with said driving conditional information to confirm the presence of abnormality of the driving motor, and

said central processing units exchange the data confirmed by said driving condition confirming means as said driving conditional information via said communications line.

3. The electric vehicle control apparatus in accordance with claim 1, wherein said operation selecting means performs the comparison of exchanged information with a predetermined margin, and said margin is variable in accordance with the actuation command calculated in said calculating means.

4. The electric vehicle control apparatus in accordance with claim 1, wherein said driving operational information detecting means and said driving condition detecting means are exclusively provided for each of said plural central processing units.

5. The electric vehicle control apparatus in accordance with claim 1, further comprising a sync means which generates a sync signal for inputting said driving operational information and said driving conditional information synchronously to said plural central processing units.