CN206561923U - A kind of SCM Based electric bicycle controller - Google Patents

Abstract

The utility model discloses an electric bicycle controller based on a single-chip microcomputer, which comprises a single-chip microcomputer and a logic circuit connected with the single-chip microcomputer, a drive circuit, a power supply circuit, a speed regulating circuit, a brake circuit, a function module and a display module; the power supply circuit is used to provide The voltage required in the controller; the speed regulation circuit is used to send the signal of the handlebar formed when rotating the speed regulation handlebar to the single-chip microcomputer; the brake circuit is used to send the signal of the handlebar handle formed when the brake handle is rotated to the singlechip microcomputer; the function module It includes a lighting circuit and a horn respectively connected with the single-chip computer; the display module includes a digital tube connected with the single-chip computer for displaying the measured rotational speed. The utility model realizes the intelligent adjustment of the rotation speed of the electric bicycle, not only has fault protection functions such as short-circuit protection, under-voltage protection, and over-current protection for the system, but also has a reliable speed-limiting function, which is beneficial to driving safety and is beneficial to electric bicycles. The development of the market is of great significance.

Description

A Single Chip Computer Based Electric Bicycle Controller

technical field

The utility model belongs to the field of electric bicycles, in particular to an electric bicycle controller based on a single-chip microcomputer.

Background technique

With the development of society, people's living standards and material conditions are also improving unconsciously. The development of green, environmentally friendly and economical energy and the creation of modern vehicles have become the most urgent research topics in today's society; in this technology With the continuous development of level and power electronics technology and the maturity of power supply, electric bicycles have become the best green transportation for people in the city. And it will be an indispensable part in people's life for quite a long period of time hereafter, which also causes my country to be the position of "bicycle kingdom" in the world. Nowadays, the battery has become the most popular bicycle battery in today's society because of its light weight, safety, low energy consumption, low emission, low noise, time-saving and labor-saving, and a living environment that is conducive to the development of a green, environmentally friendly and humanistic new atmosphere. power source. And with the increasing number of electric bicycles in cities, replacing traditional bicycles has become the general trend.

Electric bicycles are the most suitable modern means of transportation for China's national conditions, and they are also the means of transportation with the greatest potential for development in today's society. Its appearance and market promotion are of great practical significance for solving the travel difficulties of the masses and alleviating air pollution. Therefore, how to design an intelligent and safe electric bicycle controller is of great significance.

Utility model content

The purpose of the utility model is to overcome the above problems in the prior art, provide a single-chip microcomputer-based electric bicycle controller, and realize the intelligent safety and effective control of the electric bicycle.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the utility model is realized through the following technical solutions:

An electric bicycle controller based on a single-chip microcomputer, including a single-chip microcomputer, a logic circuit connected with the single-chip computer, a driving circuit, a power supply circuit connected with the single-chip computer, a speed regulating circuit, a brake circuit, a function module, and a display module;

The power supply circuit is used to provide the required voltage in the controller;

The speed regulating circuit is used to send the turning signal formed when the speed regulating turning handle is rotated to the single-chip microcomputer;

The brake circuit is used to send the brake handle signal formed when the brake handle is rotated to the single-chip microcomputer;

The functional modules include a lighting circuit and a speaker connected to the single-chip microcomputer respectively;

The display module includes a digital tube connected with the single chip microcomputer for displaying the measured rotational speed.

Further, the driving circuit adopts the high-voltage and high-current dual full-bridge driving chip L298 composed of H-bridges as the driving circuit of the system.

Further, the single-chip microcomputer adopts a control chip whose model is AT89C52.

Further, the power supply circuit includes a series resistor, three three-terminal voltage regulators and a capacitor, and the three three-terminal voltage regulators are respectively three-terminal voltage regulator 78L24, three-terminal voltage regulator 78L15, and three-terminal voltage regulator 78L05 ;

The voltage is input into the three-terminal voltage regulator 78L24 after being current-limited and divided by the series resistor, and the output voltage is output through the three-terminal voltage regulator 78L15, which is the first group of power supply, which is used to provide the power supply voltage for the drive circuit;

The first group of power supply voltage passes through the three-terminal voltage regulator 78L05 to obtain the second group of power supply voltage, which is used to provide power supply voltage for the single-chip microcomputer and its control circuit;

The capacitor is an electrolytic capacitor for filtering.

Further, the speed regulating circuit includes an adjusting potentiometer connected with the single chip microcomputer, and is used to control the voltage between rated ranges.

Further, the brake circuit includes a switch and a brake handle position sensing element;

When the switch is off, the circuit will simulate the braking state of the electric vehicle; when the switch is on, the circuit will simulate the normal running state of the electric vehicle;

The brake handle position sensing element is used to send the brake handle signal to the single-chip microcomputer, so as to realize whether to stop the power supply to the motor.

Further, electronic buttons are used in the lighting circuit to control the switch of the light.

Further, the digital tube in the display module is selected as a common-cathode two-in-one digital tube 7SEG-MPX2-CC.

The beneficial effects of the utility model are:

The utility model realizes the intelligent adjustment of the rotation speed of the electric bicycle, not only has fault protection functions such as short-circuit protection, under-voltage protection, and over-current protection for the system, but also has a reliable speed-limiting function, which is beneficial to driving safety. The system has complete functions and a high degree of automation, which is of great significance to the development of the electric bicycle market.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic diagram of the system structure of the present utility model;

Fig. 2 is a power supply circuit diagram in the utility model;

Fig. 3 is the speed regulating circuit diagram in the utility model;

Fig. 4 is the brake car circuit diagram in the utility model;

Fig. 5 is a circuit diagram of the lighting circuit and the loudspeaker in the functional module of the utility model.

detailed description

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

An electric bicycle controller based on a single-chip microcomputer as shown in Figure 1 includes a single-chip microcomputer and a logic circuit connected to the single-chip microcomputer, a driving circuit, and a power supply circuit connected to the single-chip microcomputer, a speed regulating circuit, a brake circuit, a functional module, and a display The module and the driving circuit adopt the high voltage and high current double full bridge driving chip L298 composed of H bridges as the driving circuit of this system.

As shown in Figure 2, the 48V voltage is input into the three-terminal voltage regulator 78L24 after being limited and divided by the series resistor R1, and the output voltage is 24V. The 24V voltage then passes through the three-terminal voltage regulator 78L15 to output a 15V voltage. This is the first group The power supply mainly provides the power supply voltage for the power drive circuit. Since the driving requirement of the field effect tube must be between 10V and 20V to conduct better, only after a second step-down can a suitable voltage be obtained, and it can also be used for the first The second set of +5V power supply provides pre-regulated voltage, and this set of voltage is mainly provided by the three-terminal voltage regulator 78L24 and 78L15; the second set of +5V power supply is directly obtained from the +15V power supply through the three-terminal voltage regulator 78L05; all of the The capacitors are all electrolytic capacitors, which mainly serve as a filter to reduce the peak voltage at the output of the regulated power supply due to power conversion, so that the output voltage is stable and the ripple is small.

As shown in Figure 3, the speed regulating circuit is used to send the signal of the turning handle formed when the speed regulating handle is rotated to the single-chip microcomputer. During this period, the DC motor can monitor the speed in real time, and display the real speed on the display circuit.

As shown in Figure 4, the brake circuit is used to send the brake handle signal formed when the brake handle is rotated to the microcontroller. The brake circuit includes a switch and a brake handle position sensing element; when the switch is turned off, the circuit will simulate a motor In the braking state of the car, when the switch is turned on, the circuit simulates the normal operating state of the electric car; the brake handle position sensing element is used to send the brake handle signal to the single-chip microcomputer, so as to realize whether to stop the power supply to the motor.

As shown in Figure 5, the functional modules include a lighting circuit and a speaker that are connected to the single-chip microcomputer. The lighting circuit uses electronic buttons to control the light switch. The lighting circuit and the speaker control circuit are respectively connected to the A0 and A1 ports of the 74LS243 chip in this design. .

The display module includes a digital tube connected with the single-chip microcomputer, which is used to display the measured speed. The digital tube in the display module uses a two-in-one digital tube with a common cathode 7SEG-MPX2-CC.

The utility model realizes the intelligent adjustment of the rotation speed of the electric bicycle, not only has fault protection functions such as short-circuit protection, under-voltage protection, and over-current protection for the system, but also has a reliable speed-limiting function, which is beneficial to driving safety. The system has complete functions and a high degree of automation, which is of great significance to the development of the electric bicycle market.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model.

Claims (8)

1. a kind of SCM Based electric bicycle controller, it is characterised in that：It is connected including single-chip microcomputer and with single-chip microcomputer Logic circuit, drive circuit, it is characterised in that：Also include power circuit, alignment circuit, lock the car electricity being connected with single-chip microcomputer Road, functional module, display module；

The power circuit is used for voltage needed for providing in controller；

The alignment circuit be used for by rotate speed control crank when formed turn transmit the signal to single-chip microcomputer；

The lock that the lock car circuit is used to be formed during by spin brake brake lever transmits the signal to single-chip microcomputer；

The functional module includes the lighting circuit and loudspeaker being connected respectively with single-chip microcomputer；

The display module includes the charactron being connected with single-chip microcomputer, for showing measurement rotating speed.

2. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The driving The high-voltage large current that circuit is constituted using H bridges is enjoyed a double blessing drive circuits of the bridge-type driving chip L298 as the system.

3. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The monolithic Machine uses model AT89C52 control chip.

4. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The power supply Circuit includes series resistance, three three terminal regulators and electric capacity, and three three terminal regulators are respectively three terminal regulator 78L24, three Hold voltage-stablizer 78L15, three terminal regulator 78L05；

Voltage is inputted in three terminal regulator 78L24 after the series resistance current limliting partial pressure, and output voltage is steady by three ends again Depressor 78L15 output voltages, this is first group of power supply, for providing supply voltage for drive circuit；

First group of supply voltage obtains second group of supply voltage after three terminal regulator 78L05, for for single-chip microcomputer and its control Circuit processed provides supply voltage；

The electric capacity is electrochemical capacitor, for filtering.

5. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The speed governing Circuit includes the regulation potentiometer being connected with single-chip microcomputer, for control voltage between rated range.

6. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The lock car Circuit includes switch and brake lever position sensing element；

When the switches are opened, circuit will simulate the braking state of electric car, during switch connection, breadboardin electric car it is normal Running status；

The brake lever position sensing element is used to lock transmitting the signal to single-chip microcomputer, so as to realize the confession whether stopped to motor Electricity.

7. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The illumination The switch of light is controlled in circuit using electronic key.

8. a kind of SCM Based electric bicycle controller according to claim 1, it is characterised in that：The display Charactron in module is from two integral charactron 7SEG-MPX2-CC of common cathode.