JP3467922B2 - Power supply control device for bicycle with electric motor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device for a bicycle with an electric motor, and more particularly, to a power supply control for a bicycle with an electric motor which can prevent battery consumption and complete discharge. Related to the device. 2. Description of the Related Art There is a bicycle with an electric motor that assists output by a driving force of an electric motor that operates according to the rotation speed of a crankshaft driven by human power. The operation of the electric motor is controlled by a control device (controller) incorporating various circuits. [0003] Such a bicycle with an electric motor is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-255563. The vehicle described in this publication determines that the vehicle is not in a traveling state based on a vehicle speed obtained from the number of revolutions (rotational speed) of the crankshaft and a pedal depression force (F) detected by a pon- tation meter or a motor load current. When a certain period of time elapses after not being in a state, an energy saving mode is set, and the first
Auxiliary devices, lamps, meters, and the like are not operated in a stage, and the entire circuit such as a power supply unit is turned off in a second stage to be in the same state as when a main switch is turned off. [0004] However, conventionally, in a bicycle with an electric motor, even if the bicycle is left without running while the main switch is turned on, the control device and the respective auxiliary machines are inoperable.
The battery is always operable for a certain period of time, and if left unattended for a long period of time, the battery will be consumed, running will not be possible, and the battery will be completely discharged and will not be usable. SUMMARY OF THE INVENTION Accordingly, the present invention provides an electric motor whose driving force is controlled in accordance with the number of rotations of a crankshaft driven by human power in order to eliminate the above-mentioned disadvantages. A power supply control device for a bicycle with an electric motor provided with a main switch that is turned on and off so as to supply and disconnect power from a battery to the electric motor. A second power supply circuit that is turned off irrespective of the turning on of the main switch, a pedal rotation speed detecting means for detecting a rotation speed of the pedal, and a motor rotation speed of the electric motor. And a control circuit for controlling the operation of the electric motor based on the outputs of the pedal rotation speed detection unit and the motor rotation speed detection unit. When the main switch is turned on and the motor speed is less than a predetermined time and less than a set speed when the main switch is turned on, the control circuit turns off the second power supply circuit as an energy saving mode and maintains a software standby state. It is controlled so that power of a level is supplied. [0006] The present invention relates to a control circuit,
When the main switch is turned on and the motor rotation speed is equal to or longer than a predetermined time and less than the set rotation speed, the second energy saving mode is set.
It is controlled so that the power supply circuit is turned off and a low-level power supply that can be maintained in the software standby state is supplied, so that the battery can be prevented from being consumed and the main switch can be left for a long time or turned off for a short time. Even if you forget to press, the battery can prevent complete discharge, and
Since only the number of rotations of the motor is detected, the configuration is simple, there is no malfunction of the electric motor, and the cost can be reduced. An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of the present invention. In FIG. 6, reference numeral 2 denotes a bicycle with an electric motor (hereinafter simply referred to as "bicycle"). In the bicycle 2, a front fork 8 is pivotally supported on a head pipe 6 of a frame 4, a front wheel axle 10 is pivotally supported on the front fork 8, and a front wheel 12 is mounted on the front wheel axle 10. Fork stay 14 provided in
, A vertical pipe 22 is connected to the head pipe 6 by an upper pipe 18 and a lower pipe 20, and a saddle 24 is mounted on an upper end of the vertical pipe 22. One end of the chain stay 28 and one end of the chain stay 28 are attached, respectively, and the other end of the rear fork 26 and the chain stay 28 are supported by a rear axle 30. A rear wheel 32 is attached to the rear axle 30. . The upper pipe 18 and the lower pipe 2 of the frame 4
Between the zeros, a battery 34 is mounted. A drive unit 36 is provided below the lower pipe 20. The drive unit 36 is configured as shown in FIGS. That is, the electric motor 42 is mounted in the left case 38 and the right case 40.
A planetary gear reducer 44 is connected to the electric motor 42. The planetary gear reducer 44 is connected to a planetary gear reducer carrier 48 supported by a motor reducer cover 46. This planetary gear reducer carrier 48 includes:
A primary reduction drive gear 52 for the primary reduction mechanism 50 is provided. A primary reduction driven gear 54 meshes with the primary reduction drive gear 52. The primary reduction driven gear 54 is fixed to a cylindrical spacer member 60 provided on an idler shaft 56 via a one-way clutch 58. A secondary reduction drive gear 64 of a secondary reduction mechanism 62 is fixedly provided on the spacer member 60. A secondary reduction driven gear 66 meshes with the secondary reduction drive gear 64. The secondary reduction driven gear 66 is rotatably provided on a crankshaft 68. A reduction ratio switching mechanism 70 is connected to the secondary reduction driven gear 66. The reduction ratio switching mechanism 70 includes a reduction ratio switching lever 72, a reduction ratio switching lever bearing 74, a reduction ratio connecting shaft 76 rotatably provided on a crankshaft 68, and a cam surface 78 formed on the left case 38. The reduction ratio switching lever 72 is operated by the reciprocating motion of the reduction ratio switching cable 80 as shown in FIG. The reduction gear coupling shaft 76 has a differential gear mechanism 82
Are linked. The differential gear mechanism 82 has a reduction ratio connecting shaft 7
6, a motor-side sun gear 84, a motor-side planetary gear 86 meshing with the motor-input sun gear 84, and a gear-side dock in which a reduction ratio switching dock 88 provided at an end portion of the reduction ratio connection shaft 76 engages and disengages. 90, a pedal input sun gear 92 splined to the crankshaft 68;
The pedal input sun gear 92 and the motor-side planet gear 86
And a pedal-side planetary gear 94 that meshes with. Also, the motor input sun gear 84 and the motor-side planet gear 86 side
A left carrier 96 is mounted. Further, a right carrier 98 is attached to the pedal input sun gear 92 and the pedal-side planetary gear 94 side. The right carrier 98 of the differential gear mechanism 82
Is connected to a drive sprocket boss 100 rotatably provided on the crankshaft 68. The drive sprocket 102 is attached to the drive sprocket boss 100. A chain 104 is wound around the drive sprocket 102. This chain 10
4 is wound around the driven sprocket 106 of the rear wheel 32 as shown in FIG. The left crank 110 of the left pedal 110a is mounted on the left side of the crankshaft 68 by a left pedal mounting bolt 108, and the right crank 114 of the right pedal 114a is mounted on the right by a right pedal mounting bolt 112. . The electric motor 42 is, as shown in FIGS.
The operation is controlled by a control device (controller) 116. The control device 116 includes a control circuit (CP
U) 118, a first power supply circuit (power supply circuit 1) 120,
Second power supply circuit (power supply circuit 2) 122, sensor input circuit 124, auxiliary machine circuit 126, fail-safe relay 1
28 and a motor drive circuit 130 are provided. The control circuit 118 includes a first power supply circuit 120
The main switch 132 is in contact via. The main switch 132 communicates with the battery 34 and turns on and off the power to supply power to the control circuit 118 from the battery 34. The first power supply circuit 120 is turned on / off in response to turning on / off of the main switch 132, and is always on when the main switch 132 is turned on. The battery 34 is connected to a fail-safe relay 128 of the controller 116. The fail-safe relay 128 communicates with the motor drive circuit 130 and is operated and controlled by the control circuit 118. The motor drive circuit 130 includes a control circuit 118
The operation of the electric motor 42 is controlled. The main switch 132 is in communication with the second power supply circuit 122. The second power supply circuit 122 communicates with the sensor input circuit 124 and the auxiliary circuit 126 to supply power from the battery 34 to the sensor input circuit 124 and the auxiliary circuit 126 when the main switch 132 is turned on. ,
It is turned off by the control circuit 118 regardless of whether the main switch 132 is turned on. The operation of the accessory circuit 126 is controlled by the control circuit 118 to drive the accessory 134. Further, the control circuit 118 includes a timer 118
a, a pedal rotation speed detecting means 136 for detecting the rotation speed of the crankshaft 68 and a motor rotation speed detecting means 138 for detecting the rotation speed of the electric motor 42 via the sensor input circuit 124. are doing. As shown in FIG. 4, the pedal rotation speed detecting means 136 includes a crankshaft rotation sensor notch disk 140 fixed to the crankshaft 68 and a motor reduction gear cover 46 corresponding to the crankshaft rotation sensor notch disk 140. And a pedal axle rotation sensor 142 fixedly mounted. As shown in FIG. 4, the motor speed detecting means 138 includes a motor speed sensor 144 fixed to the motor speed reducer cover 46 so as to detect the rotation of the primary reduction drive gear 52. Next, the operation of this embodiment will be described. As shown in FIG. 3, the pedaling force of the left and right pedals 110a and 114a by input and the driving force of the electric motor 42 are combined by a differential gear mechanism 82, and the resultant force is transmitted to the rear wheel 32 as the driving force. . At this time, the left and right pedals 110a, 1
The pedal rotation speed 14a is detected by the pedal rotation speed detection means 136 and sent to the control circuit 118 of the control device 116, and the motor rotation speed of the electric motor 42 is detected by the motor rotation speed detection means 138 and The signal is sent to the control circuit 118. The control device 116 controls the operation of the electric motor 42 so that the pedal rotation speed and the motor rotation speed are 1: 1. Then, as shown in the flowchart of FIG. 1, the control device 116 determines whether the main switch 132 is turned on (step 202), the motor rotation speed is less than the set rotation speed (step 204), and the motor rotation speed is determined. If the number is equal to or greater than the set number of revolutions, it is determined that the bicycle 2 is in a running state,
The travel control is normally performed (step 206), and the process returns to step 204. On the other hand, if the motor speed is less than the set speed,
If step 204 is YES, a timer is set in the control circuit 118 (step 208), and it is determined whether or not the time (t) in this state is equal to or longer than a predetermined time (Tc) (step 210). If NO in step 210, it is determined again whether the motor speed is less than the set speed (step 212). If YES in step 212,
Return to step 210. If NO in step 212, the timer is reset in the control circuit 118 (step 2).
14) Return to step 206. If YES in step 210,
It is determined that the motor rotation speed is equal to or longer than the predetermined time (Tc) and less than the set rotation speed, and that the bicycle 2 is not in the running state, and the mode is set to the energy saving mode (step 216). In the energy saving mode, the second power supply circuit 122 is turned off, and the power supply to the sensor input circuit 124 and the auxiliary circuit 126 other than the control circuit 118 is stopped (step 218). The circuit 118 is supplied with a low-level power supply such as a software standby state. This software standby state is defined as R
The minimum necessary devices such as the OM and the RAM are made operable. In order to supply the low-level power to the control circuit 118, for example, the first power supply circuit 120 can be operated by the control circuit 118. As a result, by setting the control circuit 118 in the software standby state, the oscillation of the oscillator (clock) of the control circuit 118 is stopped, the power consumption is reduced, and the consumption of the battery 34 is prevented. The return from the energy saving mode is performed by turning off the main switch 132 once. As a result, if the main switch 132 is turned on and the vehicle is left without traveling for a predetermined time (Tc) or more, an energy saving mode is set. 34 can be prevented from deteriorating due to complete discharge, the use condition of the battery 34 can be improved, and the main switch 13 for a short time can be used.
Even if the user forgets to turn off the battery 2, the battery 34 can be prevented from being completely discharged. Further, since only the number of revolutions of the motor is detected, the conventional vehicle speed detecting means and treading force detecting means become unnecessary.
The structure is simple, the malfunction of the electric motor 42 is prevented, and the cost can be reduced. As is apparent from the above detailed description, according to the present invention, the first power supply circuit which is turned on / off in accordance with the on / off of the main switch is provided, and the first power supply circuit is turned on and off. A second power supply circuit that is turned off irrespective is provided, and pedal rotation speed detection means for detecting the rotation speed of the pedal is provided,
A motor rotation number detecting means for detecting the motor rotation number of the electric motor is provided, and a control circuit for controlling the operation of the electric motor by each output of the pedal rotation number detecting means and the motor rotation number detecting means is provided. When the main switch is turned on and the motor speed is equal to or more than a predetermined time and less than a set speed, the second power supply circuit is turned off in an energy saving mode and a low level power supply capable of maintaining a software standby state is supplied. In addition to preventing the battery from being consumed, the battery is prevented from being completely discharged even if it is left for a long time or the main switch is turned off for a short time, thereby improving the use condition of the battery. In addition, since there is no need to replace the battery and only the motor speed is detected, the configuration is simple and there is no malfunction of the electric motor. , It may be a low cost.

[Brief description of the drawings] FIG. 1 is a flowchart of power supply control. FIG. 2 is a block diagram of a control device and peripheral devices. FIG. 3 is a block diagram of a drive system of the electric motor. FIG. 4 is a sectional view of a drive unit. FIG. 5 is a configuration diagram of the drive unit of FIG. FIG. 6 is a configuration diagram of a bicycle. [Explanation of symbols] 2 bicycle 34 batteries 36 drive unit 42 electric motor 68 crankshaft 82 differential gear mechanism 116 control device 118 control circuit 120 1st power supply circuit 122 Second power supply circuit 124 sensor input circuit 126 Auxiliary circuit 130 Motor drive circuit 132 main switch 136 Pedal rotation speed detecting means 138 Motor speed detection means

Claims (1)

(57) [Claim 1] An electric motor whose driving force is controlled in accordance with the number of revolutions of a crankshaft driven by human power is provided, and power from a battery is supplied to this electric motor. On
In a power supply control device for a bicycle with an electric motor provided with a main switch to be turned off,
Providing a first power supply circuit that is turned on / off in response to the off state;
A second switch that is turned off independently of the turning on of the main switch
Pedal rotation provided with power supply circuit to detect pedal rotation speed
The number detection means is provided, provided the motor rotational speed detection means for detecting a motor rotation speed of the electric motor, the electric motor
The pedal rotation number detecting means and the motor rotation number detecting means
And a control circuit that controls operation by each output
In the control circuit, when the main switch is turned on and the motor speed is equal to or longer than a predetermined time and less than a set speed, the second power supply circuit is turned off as an energy saving mode and a low level which can be maintained in a software standby state. A power supply control device for a bicycle with an electric motor, characterized in that the power supply is controlled so as to be supplied with power.