Motor driving control apparatus

• US 9,896,153 B2
• Filed: 06/13/2014
• Issued: 02/20/2018
• Est. Priority Date: 06/14/2013
• Status: Active Grant

• Current Assignee: Microspace Corporation, Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Original Assignee: Microspace Corporation, Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Inventors: Tanaka, Masato, Hosaka, Yasuo, Asanuma, Kazuo, Hagiwara, Hiromi, Shimizu, Satoru
• Primary Examiner(s): Lee, Tyler J
• Application Number:
  US14/897,014
• Publication Number:
  US 20160121963A1
• Time in Patent Office: 1,348 Days
• Field of Search: 701 22
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2200/12 Bikes
• CPC Class Codes: B60L 2220/16 DC brushless machines
• CPC Class Codes: B60L 2220/46 Wheel motors, i.e. motor connected to only one wheel
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/14 Acceleration
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/427 Voltage
• CPC Class Codes: B60L 2240/429 Current
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 50/20 using propulsion power generated by humans or animals
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 7/10 Dynamic electric regenerative braking B60L7/22 takes precedence
• CPC Class Codes: B60L 7/12 for vehicles propelled by dc motors
• CPC Class Codes: B60L 7/26 Controlling the braking effect
• CPC Class Codes: B62M 1/36 with rotary cranks, e.g. with pedal cranks B62M1/34 takes precedence; combined with reciprocating levers B62M1/26; cranks which can be immobilised as foot rests B62M5/00
• CPC Class Codes: B62M 23/02 : characterised by the use of two or more dissimilar sources of power, e.g. transmissions for hybrid motorcycles transmissions for wheeled vehicles using rider propulsion with additional source of power B62M6/00
• CPC Class Codes: B62M 6/45 : Control or actuating devices therefor
• CPC Class Codes: B62M 6/50 : characterised by detectors or sensors, or arrangement thereof
• CPC Class Codes: B62M 6/90 : Batteries
• 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

Abstract

This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.

Claims

1. A motor driving control apparatus, comprising:

an inverter configured to drive a motor; and

a regeneration controller configured to control the inverter to generate a regenerative braking force in accordance with a vehicle acceleration and a value representing a relationship between a vehicle speed and a converted vehicle speed that is obtained by converting a pedal rotation speed which is based on a measurement of a pedal rotation sensor.

2. The motor driving control apparatus as set forth in claim 1, wherein the value is a coincidence degree of the converted vehicle speed with respect to the vehicle speed, and the regeneration controller is configured to correct a regenerative braking force that corresponds to the vehicle speed and/or the vehicle acceleration according to the coincidence degree.

3. The motor driving control apparatus as set forth in claim 2, wherein the regeneration controller is configured to perform correction so that the regenerative braking force that corresponds to the vehicle speed and/or the vehicle acceleration increases, when the coincidence degree decreases.

4. The motor driving control apparatus as set forth in claim 2, wherein the regeneration controller is configured to perform control so that the coincidence degree decreases in accordance with a converted vehicle speed that is obtained by converting a pedal rotation speed in a reverse rotation direction or so that a correction degree of the regenerative braking force in a state where a pedal rotation stops is kept, when the pedal rotation is reversely performed.

5. The motor driving control apparatus as set forth in claim 2, wherein the regeneration controller is configured to control the inverter to further increase the regenerative braking force in accordance with the vehicle acceleration regardless of the coincidence degree, when the vehicle acceleration is equal to or greater than a predetermined value.

6. The motor driving control apparatus as set forth in claim 2, wherein the regeneration controller is configured to control the inverter to further increase the regenerative braking force in accordance with the vehicle speed regardless of the coincidence degree, when the vehicle speed is equal to or greater than a predetermined value.

7. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to control the inverter to linearly or accumulatively increase the regenerative braking force when the vehicle acceleration increases.

8. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to control the inverter to increase the regenerative braking force when the vehicle speed increases.

9. The motor driving control apparatus as set forth in claim 1, wherein the converted vehicle speed is calculated based on a maximum gear ratio of selectable gear ratios.

10. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to perform correction to increase the regenerative braking force by using an offset value that corresponds to a converted vehicle speed that is obtained by converting a pedal rotation speed in a reverse rotation direction, when a pedal rotation is reversely performed.

11. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to restrict the regenerative braking force to be equal to or less than a regenerative braking force determined based on a predetermined regenerative efficiency.

12. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to control the inverter to increase the regenerative braking force when an output voltage of a battery for the motor falls.

13. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to set a steady correction amount of the regenerative braking force according to tendency of change of an output voltage of a battery for the motor, and is configured to control the inverter to generate a regenerative braking force corrected by the correction amount.

14. The motor driving control apparatus as set forth in claim 1, wherein the regeneration controller is configured to restrict the regenerative braking force to be equal to or less than a regenerative braking force obtained when regenerative braking by a manual operation is performed.

15. The motor driving control apparatus as set forth in claim 1, wherein the value is a deviation degree of the converted vehicle speed from the vehicle speed, and the regeneration controller is configured to correct a regenerative braking force that corresponds to the vehicle speed and/or the vehicle acceleration according to the deviation degree.