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Motor drive control device and electric moped

A technology of electric motors and driving parts, applied in the field of electric motor drive control devices and electric bicycles, can solve problems such as inability to effectively recover energy and unconsidered problems

Inactive Publication Date: 2022-06-24
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 drive control device and electric moped
  • Motor drive control device and electric moped
  • Motor drive control device and electric moped

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is an external view which shows an example of the electric power assist bicycle in this embodiment. The electric assist bicycle 1 is, for example, a general rear wheel drive type electric assist bicycle in which a 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 includes 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, the brake sensor is not used.

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

[0032] The torque sensor 103 is provided on the rim attached to the crankshaft, detects the pedaling force of the rider, and outputs the detection result to the motor drive...

Embodiment approach 2

[0073] In the first embodiment, the energy recovery flag is set to ON immediately after the condition that the smoothed acceleration is below the threshold value continues for a predetermined time or longer, and the energy recovery control unit 3300 specifies the The amount of energy recovery is controlled in the manner of energy recovery. In this case, since the energy recovery is performed immediately, the overall energy recovery time increases, so the charge amount also increases.

[0074] However, when the conditions described above are satisfied, the set speed is changed, and the posture of the rider may become unstable. There are also cases in which the energy recovery function in this state makes it feel awkward. Therefore, for example, the start of the energy recovery may be delayed until the time T3 (>0) elapses from the time when the conditions described above are satisfied.

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

Embodiment approach 3

[0082] In the first embodiment, the description was given as A2-A1.

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

[0084] Specifically, when the negative acceleration due to the regenerative braking is set to -A3 (A3 is a positive value), it is preferable to set it as -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 is a case where the energy recovery stop cannot be performed.

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

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

[0087] For example, when the mechanic...

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PUM

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Abstract

The present invention is capable of automatically starting energy recovery at the proper timing. The invention relates to a motor drive control device and an electric power-assisted vehicle. The motor drive control device of the present invention has: (A) a drive unit that drives the motor; and (B) a control unit that continues for a first specific time in a state where the acceleration of the vehicle on which the motor is mounted is negative and equal to or less than a first specific value. Next, the drive unit is controlled to start energy recovery after a second specified time has elapsed after the first specified time, or to gradually increase the energy recovery amount.

Description

technical field [0001] The present invention relates to a motor drive control device and an electric assist vehicle having the motor drive control device. Background technique [0002] A certain document discloses an electric bicycle which is provided 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, there are cases where the energy recovery cannot be performed effectively because the rider does not necessarily operate the brakes in such a way that the brake sensor can properly detect the braking operation. [0003] In addition, another document discloses a mobile machine with auxiliary power that starts energy recovery when the acceleration becomes greater than or equal to a specific value, but the specific value is only determined based on the relationship with the speed, and the road surface conditions are not taken into consideration. problems, etc. [000...

Claims

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Application Information

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Patent Type & Authority Patents(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