JP3749588B2 - Controller with dry cell - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a controller having a dry battery.
[0002]
[Prior art]
Conventionally, bicycles use dry batteries to change gears while driving, and display speed, distance, time, etc. using an LCD. These bicycles generally use a dry battery such as a lithium battery, and it is desired that the dry battery can be used for a long time.
[0003]
FIG. 2 shows a controller having a dry cell used for a bicycle. In the figure, reference numeral 1 is a dry cell, 2 is a constant voltage circuit for making the output a constant voltage with respect to the time-dependent fluctuation of the input dry cell 1, 3 is a power source for the dry cell 1, and internally performs digital arithmetic processing and then shifts during shifting. The control devices 5 and 4 for giving a command to change the speed of the motor, and for giving instructions such as speed, mileage, and time, respectively, receive the output signal of the control device 3, and a gear change motor and a gear change motor for shifting the bicycle 5 is a motor drive circuit for driving 5. Reference numeral 6 denotes a display device that receives an output signal from the control device 3 and displays speed, travel distance, time, life prediction, and the like. Reference numeral 7 denotes a shift setting device for instructing a set value at the time of shifting.
[0004]
Even if the dry battery 1 deteriorates with time and the terminal voltage V1 of the dry battery 1 decreases, the output voltage V2 of the constant voltage circuit 2 becomes constant. The terminal voltage V1 of the dry battery 1 is greatly reduced, and the control device 3 predicts the life of the dry battery according to the ratio to the output voltage V2 of the constant voltage circuit 2, and the display device 6 predicts or displays the life of the dry battery. ing.
[0005]
[Problems to be solved by the invention]
However, because the output of the constant voltage circuit 2 is connected to the control circuit 3, the shift setting device 7, the motor drive circuit 4, the shift motor 5, the display device 6, and the like, the constant voltage circuit 2 needs to be large. Therefore, there is a problem that the loss is large and the life of the dry battery is shortened.
[0006]
[Means for Solving the Problems]
A controller having a dry battery according to the present invention inputs a dry battery, a display device that displays at least one of speed, mileage, time, and life prediction, and an output of the dry battery and a set value for setting a shift of a speed change motor. And a control device that outputs a shift command signal for instructing a shift to the shift motor and a display command signal for instructing a display on the display device, and the control device and the shift motor. There is provided a motor drive circuit that is provided in between and includes a constant voltage source that drives the speed change motor and supplies a shunt current to protect the overcurrent flowing in the speed change motor . The control device compares the voltage of the constant voltage source with the voltage of the dry battery as a reference signal for predicting the life of the dry battery.
[0007]
The shift value for setting the shift motor and the terminal voltage of the dry battery are input, the ratio is digitally processed, and a shift command signal and a display command signal are output. Then, a gear shift command signal is commanded to the gear shifting motor via a motor drive circuit at the time of gear shifting, and the speed, travel distance, time, life prediction, etc. are displayed on the display device by the display command signal. Even if the battery deteriorates over time, the constant voltage source of the motor drive circuit inputs it to the control device as a reference signal for life prediction, and the control device compares the terminal voltage of the dry battery with the reference signal to predict the life of the dry battery. And display the battery life prediction or life on the display.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
A controller having a dry battery of the present invention will be described with reference to FIG. 1 showing an embodiment thereof. In FIG. 1, the difference from the conventional FIG. 2 is that the constant voltage source provided for overcurrent protection is built in the motor drive circuit 4 except for the constant voltage circuit 2 of FIG. The reference power supply is used. That is, 1 is a dry battery, 3 is a shift command for the shift motor 4 at the time of shifting, a control device that commands display of speed, mileage, time, life prediction, etc. 5 and 4 receive a shift command signal of the control device 3. , A motor for shifting and a motor drive circuit for driving the motor 5 at the time of shifting. A display device 6 receives a display command signal from the control device 3 and displays speed, travel distance, time, life prediction, and the like. Reference numeral 7 denotes a shift setting device for instructing a set value at the time of shifting.
[0009]
If the dry battery 1 deteriorates over time, the terminal voltage V1 of the dry battery 1 is directly input to the control device. Further, the motor drive circuit 4 has a built-in constant voltage source for supplying a shunt current in order to protect against an overcurrent flowing through the transmission motor 5. The constant voltage of the constant voltage source is set as a reference voltage V3, and the reference voltage V3 and the terminal voltage V1 of the dry battery are compared by the control device 3. When the decrease in the terminal voltage V1 of the dry battery 1 increases and the ratio of the motor drive circuit 4 to the reference voltage V3 decreases, the control device 3 predicts the life of the dry battery, and the display device 6 predicts the life of the dry battery or Is displayed.
[0010]
【The invention's effect】
In the controller having the dry battery of the present invention, when the dry battery changes with time, the life of the dry battery can be predicted and the life can be displayed according to the ratio of the terminal voltage of the dry battery and the reference voltage of the drive circuit. Further, by using a constant voltage power source built in the motor drive circuit, it is not necessary to provide a constant voltage circuit as in the prior art, so that the loss is small and the life of the dry battery can be extended.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing an embodiment of a controller having a dry battery of the present invention.
FIG. 2 is a schematic block diagram of a controller having a conventional dry battery.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dry cell 3 Control apparatus 4 Motor drive circuit 5 Shifting motor 6 Display apparatus 7 Shift setting device

Claims (1)

Batteries and
A display device that displays at least one of speed, mileage, time, and life prediction;
A shift command signal for instructing a shift to the shift motor, a display command signal for instructing a display on the display device, digitally processing the output of the battery and a set value for setting the shift of the shift motor as inputs A control device for outputting
A motor drive circuit, which is provided between the control device and the speed change motor, drives the speed change motor, and incorporates a constant voltage source for supplying a shunt current for overcurrent protection flowing in the speed change motor ;
And a controller having a dry cell that compares the voltage of the constant voltage source with the voltage of the dry cell as a reference signal for predicting the lifetime of the dry cell.

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