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Motor driving control apparatus and method and motor-assisted vehicle

A technology for electric motors and drive motors, applied in electric vehicles, brake control systems, motor vehicles, etc., can solve problems such as inability to effectively recover energy and unconsidered problems

Inactive Publication Date: 2019-04-02
TAIYO YUDEN KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the brake sensor is relatively expensive, since the rider does not necessarily operate the brakes in such a way that the brake sensor can properly detect the brake operation, there are cases where energy recovery cannot be performed effectively
[0003] In addition, other literature discloses a mobile device with auxiliary power that starts energy recovery when the acceleration exceeds a certain value, but the specific value is determined only based on the relationship with the speed, and does not take into account the impact caused by the road surface conditions. problems, etc.

Method used

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  • Motor driving control apparatus and method and motor-assisted vehicle
  • Motor driving control apparatus and method and motor-assisted vehicle
  • Motor driving control apparatus and method and motor-assisted vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is an external view showing an example of the electric assist bicycle in this embodiment. The electric assist bicycle 1 is, for example, a general rear wheel drive electric assist bicycle in which the rear wheel is connected to a crankshaft via a chain.

[0030] Furthermore, the electric assist bicycle 1 is equipped with a motor drive device. The motor drive device has a secondary battery 101 , a motor drive control device 102 , a torque sensor 103 , a pedal rotation sensor 107 , and a motor 105 . In this embodiment, a brake sensor is not used.

[0031] The secondary battery 101 is, for example, a lithium-ion secondary battery, and may also be other types of batteries, such as lithium-ion polymer secondary batteries, nickel-metal hydride storage batteries, and the like.

[0032] The torque sensor 103 is provided on a rim attached to the crankshaft, detects the rider's pedaling force, and outputs the detection result to the motor drive control device 102 ....

Embodiment approach 2

[0073] In the first embodiment, when the condition that the smoothed acceleration is equal to or less than the threshold continues for a fixed period of time or longer is satisfied, the energy recovery flag is set to ON immediately, and the energy recovery control unit 3300 responds by specifying The amount of energy recovered is controlled by means of energy recovery. In this case, since the energy recovery is performed immediately, the overall energy recovery time increases, so the charging amount also increases.

[0074] However, when the conditions as described above are met, the set speed changes, and the rider's posture may become unstable. In this state, the energy recuperation works, which may give people a sense of awkwardness or the like. Therefore, for example, the start of energy recovery may be delayed until time T3 (>0) elapses from when the above-described conditions are established.

[0075] In addition, it is also possible to gradually increase the energy re...

Embodiment approach 3

[0082] In the first embodiment, A2-A1 has been described.

[0083] On the other hand, since regenerative braking also produces negative acceleration, it is preferable to set "A2" in consideration of such negative acceleration.

[0084] Specifically, when the negative acceleration generated by regenerative braking is -A3 (A3 is a positive value), it is preferable to set -A3>-A2 and A3<A2. In addition, the difference between A2 and A3 is set in consideration of noise. If a setting such as -A3<-A2 is performed, there may be cases where energy recovery cannot be stopped.

[0085] use Figure 9 An example of operation when the threshold "-A2" is set as described above will be described.

[0086] Figure 9 The horizontal axis of represents time, (a) represents the opening or closing of the mechanical brake, (b) represents the smoothed acceleration, and (c) represents the opening or closing of the energy recovery flag.

[0087] For example, when the mechanical brake is turned on...

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Abstract

The invention can automatically start regeneration at a proper timing sequence. The invention relates to a motor driving control apparatus, and a motor-assisted vehicle. The motor driving control apparatus includes: (A) a driving unit configured to drive a motor; and (B) a controller configured to control the driving unit to start regeneration after lapse of a first time period since a second predetermined time period elapsed or gradually increase a regeneration amount, when a state that an acceleration of a vehicle on which the motor is embodied is negative and equal to or less than a first predetermined value continues for the second predetermined time period.

Description

technical field [0001] The invention relates to a motor drive control device and an electric power-assisted vehicle provided with the motor drive control device. Background technique [0002] A certain document discloses an electric bicycle that is equipped with a brake sensor and performs energy recovery when a brake operation is detected by the brake sensor. However, although the brake sensor is relatively expensive, since the rider does not necessarily operate the brakes in such a manner that the brake sensor can properly detect the brake operation, there are cases where energy recovery cannot be effectively performed. [0003] In addition, other literature discloses a mobile device with auxiliary power that starts energy recovery when the acceleration exceeds a certain value, but the specific value is determined only based on the relationship with the speed, and does not take into account the impact caused by the road surface conditions. problems etc. [0004] [Prior a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/10
CPCB60L7/10B60T8/1706B60L7/26B60T8/261B60T8/3225B60T2270/604B62M6/45B60L2200/12B62D5/0463B62M6/65
Inventor 保坂康夫白川弘和栁岡太一
Owner TAIYO YUDEN KK
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