CN208539810U - A kind of 4 channel servo motor driving circuits - Google Patents
A kind of 4 channel servo motor driving circuits Download PDFInfo
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- CN208539810U CN208539810U CN201821064367.XU CN201821064367U CN208539810U CN 208539810 U CN208539810 U CN 208539810U CN 201821064367 U CN201821064367 U CN 201821064367U CN 208539810 U CN208539810 U CN 208539810U
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Abstract
The utility model relates to a kind of 4 channel servo motor driving circuits, especially a kind of 4 channel DC brush motor driving circuits of low cost with voltage protection and current protecting function.It includes communication circuit module, control circuit module, drive circuit module and power circuit block；The communication circuit module is connect with control circuit module by RS232 signal；Control circuit module is connect with drive circuit module by PWM and on-off model；Power circuit block is 3.3V supply voltage I to the supply voltage of communication circuit module；Power circuit block is 3.3V supply voltage II to the supply voltage of control circuit module；Power circuit block is 12V supply voltage to the supply voltage of drive circuit module.The circuit can carry out single speed adjuster SERVO CONTROL to 4 channel DC brush motors simultaneously, be provided simultaneously with overvoltage protection, under-voltage protection, overcurrent protection and battery capacity display function, and cost is relatively low.
Description
Technical field
The utility model relates to a kind of 4 channel servo motor driving circuits, especially a kind of to have voltage protection and electric current
The 4 channel DC brush motor driving circuit of low cost of defencive function.
Background technique
Currently, intelligent robot technology grows rapidly, and people become increasingly complex to the functional requirement of intelligent robot, this is just
Need robot that can do more movements, more movements need more motors to support, however, having closed loop on the market
The brush direct current motor driver of function is usually all 1 channel or 2 channels, is not able to satisfy robot technology increasingly and quickly sends out
The demand of exhibition.
In addition, being provided simultaneously with the brush direct current motor of voltage protection, current protection and battery capacity detection function on the market
Driver also seldom or higher cost.
Utility model content
For defect existing for current brush direct current motor driver, the utility model aim is the provision of one kind and has
The 4 channel DC brush motor driving circuit of low cost of voltage protection and current protecting function.The circuit can be simultaneously to 4 channels
Brush direct current motor carries out single speed adjuster SERVO CONTROL, is provided simultaneously with overvoltage protection, under-voltage protection, overcurrent protection and battery capacity
Display function, and cost is relatively low.
The utility model to achieve the goals above, adopts the following technical scheme that
A kind of 4 channel servo motor driving circuits, it includes communication circuit module, control circuit module, driving circuit mould
Block and power circuit block；
The communication circuit module is connect with control circuit module by RS232 signal；Circuit module and driving circuit processed
Module is connected by PWM with on-off model；
Power circuit block is 3.3V supply voltage I to the supply voltage of communication circuit module；
Power circuit block is 3.3V supply voltage II to the supply voltage of control circuit module；
Power circuit block is 12V supply voltage to the supply voltage of drive circuit module.
Further, in the power circuit block: external 12V power input turns 5V power module with 12V and connect, 12V
The output end for turning 5V power module turns 3.3V power module with 5V by 5V output voltage and connect, and 5V turns the output of 3.3V power module
3.3V output voltage；
External 12V power input is connect with supply voltage detection module, and supply voltage detection module output detection voltage is defeated
Signal out；
External 12V power input exports 12V output voltage.
Further, in the control circuit module: the output end of clock circuit connects CPU by clock signal, resets
The output end of circuit connects CPU by reset signal；
CPU exports PWM and on-off model, CPU input and output RS232 signal and emulation signal, CPU input coding device are believed
Number and AD sampled signal.
Further, in the drive circuit module: the signal input part of A4950 drive module has pwm signal and switch
Signal is measured, the signal output end of A4950 drive module has motor drive signal.
Further, in the communication circuit module: the input terminal that USB turns serial port module has RS232 rs 232 serial interface signal, USB
The output end for turning serial port module has usb signal.
(1) power module circuitry
The 12V voltage that external power supply inputs is converted to 5V and 3.3V electricity by the way of step pressure reducing by power module circuitry
Pressure, while acquiring the voltage value of external equipment output.12V is turned the conversion module of 5V and is realized using MP2359 conversion chip, can be with
Export the electric current of 5V voltage and maximum 1.2A；5V is turned 3.3V module and is realized using AMS1117-3.3 conversion chip, can be exported
The electric current of 3.3V voltage and maximum 1A；The voltage value of external equipment output is realized by the way of electric resistance partial pressure, in order to adapt to CPU
The level input range (maximum 3.3V) of internal AD sampling module, sampling resistor select 1 kilo-ohm and 10 kilo-ohms of electric resistance partial pressure,
The voltage at 1 kilo-ohm of resistance both ends is taken, input voltage maximum in this way is 1.09V, meets the level input requirements of AD sampling module.
(2) control module circuit
Control module circuit provides the platform of servo control software operation.Wherein CPU selects STM32F103 to realize；It is multiple
Position circuit realizes that resistance and capacitance are respectively 10 kilo-ohms and 0.1uf using rc reset circuit；Clock circuit uses
Crystal oscillator inside STM32F103 realizes that the filter capacitor of the crystal of one 8M of external connection and two 22pf are realized.It is imitative
True circuit, PWM and output switch parameter interface and encoder acquisition interface, serial ports, A D interface directly adopt inside STM32F103
Emulation module, motor control module, serial port module, AD sampling module realize that outside does not need any additional device.
(3) drive module circuit
Drive module circuit is for driving 4 channel DC brush motors.Using 4 pieces of A4950 integrated drive chips, every piece
Driving chip controls 1 channel DC brush motor.In addition, since the chip carries current detection function, in the chip
The current protecting function of 2A can be realized in the resistance that 0.25 Europe is connected between 1st foot and the 7th foot.
(4) communication module circuit
Communication module circuit for realizing this circuit and external equipment communication.The rs 232 serial interface signal that this circuit exports CPU
Usb signal is converted to, conversion chip is integrated using CH340 and is realized.
The beneficial effects of the utility model
The driving circuit of the utility model design can control 4 channel DC brush motors simultaneously, can be well adapted for
The increasingly complicated functional requirement of intelligent robot.Meanwhile this driving circuit applies the internal resource of CPU as much as possible, drops significantly
Low circuit cost.In addition, this driving circuit uses integrated chip to realize correlation function as far as possible, the stability of circuit is enhanced.
Detailed description of the invention
Fig. 1 is that each circuit module of the utility model driver connects block diagram；
Fig. 2 is annexation figure inside the utility model power circuit block；
Fig. 3 is annexation figure inside the utility model control circuit module；
Fig. 4 is the annexation figure of a channel circuit inside the utility model drive circuit module；
Fig. 5 is annexation figure inside the utility model communication module；
Arrow direction indicates signal flow in figure.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
A kind of 4 channel servo motor driving circuits, it includes communication circuit module 1, control circuit module 2, driving circuit
Module 3 and power circuit block 4；
The communication circuit module 1 is connect with control circuit module 2 by RS232 signal 5；Circuit module 2 processed and driving
Circuit module 3 is connected by PWM and on-off model 6；
Power circuit block 4 is 3.3V supply voltage I 7 to the supply voltage of communication circuit module 1；
Power circuit block 4 is 3.3V supply voltage II 8 to the supply voltage of control circuit module 2；
Power circuit block 4 is 12V supply voltage 9 to the supply voltage of drive circuit module 3.
In the power circuit block 4: external 12V power input 41 turns 5V power module 42 with 12V and connect, and 12V turns 5V
The output end of power module 42 turns 3.3V power module 43 with 5V by 5V output voltage 46 and connect, and 5V turns 3.3V power module 43
Export 3.3V output voltage 47；
External 12V power input 41 is connect with supply voltage detection module 44, the output detection of supply voltage detection module 44
Voltage output signal 48；
External 12V power input 41 exports 12V output voltage 45.
In the control circuit module 2: the output end of clock circuit 21 connects CPU23 by clock signal 24, resets electricity
The output end on road 22 connects CPU23 by reset signal 25；
CPU23 exports PWM and on-off model 26, CPU23 input and output RS232 signal 28 and emulation signal 29, CPU23
Input coding device signal 27 and AD sampled signal 210.
In the drive circuit module 3: the signal input part of A4950 drive module 31 has pwm signal 32 and switching value letter
The signal output end of number 33, A4950 drive module 31 has motor drive signal 34.
In the communication circuit module 1: the input terminal that USB turns serial port module 11 has RS232 rs 232 serial interface signal 12, and USB turns string
The output end of mouth mold block 11 has usb signal 13.
This driving circuit is made of power module circuitry, control module circuit, drive module circuit and communication module circuit.
Concrete composition block diagram is as shown in Figure 1.
Power module circuitry: power module circuitry needs the 12V voltage for inputting external cell to be converted into CPU needs
The 5V voltage that 3.3V voltage and peripheral hardware need.In order to reduce power consumption, enhance the stability of circuit, this circuit is using step pressure reducing
Mode is realized, i.e., 12V is first converted to 5V with one piece of voltage stabilizing chip, and 5V is being converted into 3.3V with one piece of voltage stabilizing chip.In addition,
In this module, there are over-voltage and under-voltage detection and the protection circuit of supply voltage, the circuit is using electric resistance partial pressure, capacitor filtering
Mode realizes that input terminal is connected to the input terminal that 12V turns 5V Voltage stabilizing module, and output end is connected in the A D interface of CPU.Specifically connect
It is as shown in Figure 2 to connect relationship.
Control module circuit: control circuit provides the platform of SERVO CONTROL program operation, including CPU, clock circuit, reset
Circuit, artificial circuit, PWM output interface, encoder acquisition interface, serial ports, A D interface.Clock circuit uses CPU internal oscillator
Device realizes that outside only needs to connect one piece of crystal oscillator and two filter capacitors；Reset circuit is realized using rc reset circuit；Emulation
Circuit, PWM and output switch parameter interface and encoder acquisition interface, serial ports, A D interface directly adopt the emulation mould inside CPU
Block, motor control module, serial port module, AD sampling module realize that outside does not need any additional device.Specific connection relationship
As shown in Figure 3.
Drive module circuit: drive module circuit is for driving four-way brush direct current motor.In order to enhance the steady of circuit
It is qualitative, it is realized using 4 pieces of integrated drive chips A4950.In addition, since the chip carries current detection function, in the core
Connecting a resistance between 1st foot of piece and the 7th foot can be realized current protecting function.Specific connection relationship is as shown in Figure 4.
Communication module circuit: communication module circuit for realizing this circuit and external equipment communication.In order to be conveniently inserted,
The CPU rs 232 serial interface signal exported is converted to usb signal by this circuit, while in order to enhance the stability of circuit, turning serial ports using USB
Integrated chip is converted to complete signal.Specific connection relationship is as shown in Figure 5.
Claims (5)
1. a kind of 4 channel servo motor driving circuits, it is characterised in that: it includes communication circuit module (1), control circuit module
(2), drive circuit module (3) and power circuit block (4)；
The communication circuit module (1) is connect with control circuit module (2) by RS232 signal (5)；Circuit module (2) processed with
Drive circuit module (3) is connected by PWM and on-off model (6)；
Power circuit block (4) is 3.3V supply voltage I (7) to the supply voltage of communication circuit module (1)；
Power circuit block (4) is 3.3V supply voltage II (8) to the supply voltage of control circuit module (2)；
Power circuit block (4) is 12V supply voltage (9) to the supply voltage of drive circuit module (3).
2. 4 channel servo motor driving circuit according to claim 1, it is characterised in that: the power circuit block (4)
In: external 12V power input (41) turns 5V power module (42) with 12V and connect, and the output end that 12V turns 5V power module (42) is logical
It crosses 5V output voltage (46) and turns 3.3V power module (43) with 5V and connect, 5V turns 3.3V power module (43) output 3.3V output electricity
It presses (47)；
External 12V power input (41) connect with supply voltage detection module (44), supply voltage detection module (44) output inspection
It surveys voltage output signal (48)；
External 12V power input (41) exports 12V output voltage (45).
3. 4 channel servo motor driving circuit according to claim 1, it is characterised in that: the control circuit module (2)
In: the output end of clock circuit (21) connects CPU(23 by clock signal (24)), the output end of reset circuit (22) passes through multiple
Position signal (25) connects CPU(23)；
CPU(23) output PWM and on-off model (26), CPU(23) input and output RS232 signal (28) and emulate signal
(29), CPU(23) input coding device signal (27) and AD sampled signal (210).
4. 4 channel servo motor driving circuit according to claim 1, it is characterised in that: the drive circuit module (3)
In: the signal input part of A4950 drive module (31) has pwm signal (32) and on-off model (33), A4950 drive module
(31) signal output end has motor drive signal (34).
5. 4 channel servo motor driving circuit according to claim 1, it is characterised in that: the communication circuit module (1)
In: the input terminal that USB turns serial port module (11) has RS232 rs 232 serial interface signal (12), and the output end that USB turns serial port module (11) has
Usb signal (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064367.XU CN208539810U (en) | 2018-07-06 | 2018-07-06 | A kind of 4 channel servo motor driving circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064367.XU CN208539810U (en) | 2018-07-06 | 2018-07-06 | A kind of 4 channel servo motor driving circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208539810U true CN208539810U (en) | 2019-02-22 |
Family
ID=65386719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821064367.XU Active CN208539810U (en) | 2018-07-06 | 2018-07-06 | A kind of 4 channel servo motor driving circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208539810U (en) |
-
2018
- 2018-07-06 CN CN201821064367.XU patent/CN208539810U/en active Active
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