Motor driving control apparatus

• US 10,040,508 B2
• Filed: 05/16/2017
• Issued: 08/07/2018
• 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:
  US15/596,310
• Publication Number:
  US 20170247079A1
• Time in Patent Office: 448 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 5 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. An electrically assisted vehicle, comprising:

a rechargeable battery;

an inverter configured to drive a motor to generate a certain regenerative braking force; and

a regeneration controller configured to determine a regenerative braking force according to a running state of the electrically assisted vehicle, to correct the regenerative braking force according to an accumulated value obtained by accumulating plural values, each of which represents a decreasing degree of remaining charge of the rechargeable battery, and to control the inverter to cause the motor to generate the corrected regenerative braking force.

2. The electrically assisted vehicle as set forth in claim 1, wherein the values are obtained at respective timings of charging the rechargeable battery by an external power supply.

3. The electrically assisted vehicle as set forth in claim 2, wherein the regeneration controller is configured to increase the regenerative braking force when the accumulated value is calculated using the values that are obtained while the decreasing degree of the remaining charge of the rechargeable battery at the timing is kept to be greater than a predetermined threshold.

4. The electrically assisted vehicle as set forth in claim 1, wherein the regeneration controller is configured to increase the regenerative braking force when the accumulated value is calculated using the values that represent shortage of the remaining charge of the rechargeable battery.

5. The electrically assisted vehicle as set forth in claim 1, wherein the regenerative controller is configured to determine each of the values based on an output voltage of the rechargeable battery.

6. The electrically assisted vehicle as set forth in claim 1, wherein the regenerative controller is configured to cause the inverter to perform a regenerative braking in response to a braking operation.

7. The electrically assisted vehicle as set forth in claim 1, wherein the regenerative controller is configured to cause the inverter to automatically perform a regenerating braking according to the running state of the electrically assisted vehicle.

8. The electrically assisted vehicle as set forth in claim 1, wherein the regenerative controller is configured to further correct the regenerative braking force so that the regenerative braking force increases according to decrease of the remaining charge of the rechargeable battery.