CN219643754U - Motor driving device with optical coupler isolation function - Google Patents
Motor driving device with optical coupler isolation function Download PDFInfo
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- CN219643754U CN219643754U CN202320507828.0U CN202320507828U CN219643754U CN 219643754 U CN219643754 U CN 219643754U CN 202320507828 U CN202320507828 U CN 202320507828U CN 219643754 U CN219643754 U CN 219643754U
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- 230000003287 optical effect Effects 0.000 title abstract description 5
- 238000002955 isolation Methods 0.000 title description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 35
- 239000010703 silicon Substances 0.000 claims abstract description 35
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000005693 optoelectronics Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the field of motor driving, and particularly discloses an optical coupling isolated motor driving device which comprises a driving circuit, a control circuit and a power supply circuit, wherein the driving circuit is connected with the control circuit; the driving circuit comprises a first level conversion circuit, a first photoelectric silicon controlled rectifier and a first bidirectional silicon controlled rectifier which are sequentially connected, and a second level conversion circuit, a second photoelectric silicon controlled rectifier and a second bidirectional silicon controlled rectifier which are sequentially connected; the output end of the first photoelectric silicon controlled rectifier is connected with the gate electrode of the first bidirectional silicon controlled rectifier; the output end of the second photoelectric silicon controlled rectifier is connected with the gate electrode of the second bidirectional silicon controlled rectifier; two main terminals of the first bidirectional thyristor are respectively and electrically connected with the power interface and the first control interface, and two main terminals of the second photoelectric thyristor are respectively and electrically connected with the power interface and the second control interface; the control circuit comprises a main control chip. The utility model avoids the interference of strong current to weak current and increases the safety and the simplicity of the circuit.
Description
Technical Field
The utility model relates to the field of motor driving, in particular to an optical coupling isolated motor driving device.
Background
With the development of modern electronic control technology and the wider and wider application fields of motors, the requirements of motor control circuits are also more and more diversified and complicated.
The motor driving board is generally composed of a driving circuit, a control circuit, various interfaces and the like. For a strong-current motor, namely a motor with the working voltage of 220V or 380V, the motor driving voltage is very high or the current is very large, and the integrated motor driving circuit and control circuit, the driving chip or the main control chip of which is usually a direct current weak-current circuit running at the voltage of not higher than 36V, such as 3.3V, 5V and the like.
In the fields of factories, intelligent household appliances and the like, a strong-current motor is usually provided with a strong-current switch which is used for controlling the forward and reverse rotation, starting or stopping of the motor in a concurrent manner, such as directly controlling the starting and stopping of a driving circuit; or the control circuit is controlled by a weak current switch, a remote control signal or a control program, so that the working state of the driving circuit is indirectly controlled. However, the driving circuit and the control circuit respectively work under strong and weak voltages, interference and breakdown damage are easy to occur between the driving circuit and the control circuit, the control logic sequence between different control modes is complex to realize, the existing motor driving is difficult to consider the signal isolation safety between the driving circuit and the control circuit, the control logic is high-efficiency and accurate, and the existing similar control driving circuit is high in implementation cost and insufficient in safety.
Disclosure of Invention
In order to solve the problem that the existing motor driving is difficult to consider the signal isolation safety and the control logic safety between a driving circuit and a control circuit, the utility model provides an optical coupling isolated motor driving device.
The technical scheme adopted by the utility model is as follows: an optocoupler isolated motor driving device is used for driving a motor to work, the motor comprises a first control interface and a second control interface, and a power interface used for supplying power to the motor, and the optocoupler isolated motor driving device comprises a driving circuit, a control circuit and a power supply circuit; the driving circuit comprises a first storage battery level conversion circuit, a first photoelectric silicon controlled rectifier and a first bidirectional silicon controlled rectifier which are sequentially connected, and a second storage battery level conversion circuit, a second photoelectric silicon controlled rectifier and a second bidirectional silicon controlled rectifier which are sequentially connected; the output end of the first photoelectric silicon controlled rectifier is connected with the gate electrode of the first bidirectional silicon controlled rectifier; the output end of the second photoelectric silicon controlled rectifier is connected with the gate electrode of the second bidirectional silicon controlled rectifier; one of the main terminals of the first bidirectional thyristor is electrically connected with the power interface, the other main terminal is electrically connected with the first control interface, one of the main terminals of the second photoelectric thyristor is electrically connected with the power interface, and the other main terminal is electrically connected with the second control interface; the control circuit comprises a main control chip and a matched circuit thereof, wherein a first output I/O port of the main control chip is connected with a first storage battery level conversion circuit, and a second output I/O port is connected with a second storage battery level conversion circuit; the power supply circuit is electrically connected with the driving circuit and the control circuit.
Preferably, the model of the photoelectric silicon controlled rectifier is EL3063, and the model of the bidirectional silicon controlled rectifier is BT134-600E.
The main control chip also preferably comprises a limit circuit, wherein the limit circuit is electrically connected with the input I/O port of the main control chip.
Preferably, the limit circuit is provided with two sensors for limiting the stroke of the motor.
Preferably, the interface circuit further comprises an interface circuit, wherein the interface circuit comprises a bus interface circuit for inputting control signals, and the bus interface circuit is electrically connected with the main control chip.
Preferably, the interface circuit specifically comprises two network interfaces, an RS485 interface circuit and an RS232 interface circuit, and the two network interfaces are electrically connected with the main control chip through the RS485 interface circuit and the RS232 interface circuit respectively.
Preferably, the interface circuit further comprises a download interface circuit electrically connected with the main control chip and a pin socket, and the download interface circuit is electrically connected with the pin socket.
Preferably, the main control chip is an N32G030K8L7 chip.
Preferably, the control button circuit is electrically connected with three I/O ports of the main control chip.
Preferably, the first level conversion circuit and the second level conversion circuit are both single-phase level conversion discrete circuits implemented by using triodes.
The beneficial effects of the utility model are as follows:
(1) The weak current and the strong electric signal of the control circuit and the motor are isolated through the photoelectric silicon controlled rectifier, the strong current is controlled by weak current drive, the interference of the strong current to the weak current is avoided, and meanwhile, the safety of the circuit is also improved.
(2) The steering of the motor is controlled through the bidirectional silicon controlled rectifier, and the drive IC is replaced by the level conversion circuit, so that the cost is saved, and the use effect is good; and the circuit is relatively simple, and the stability and the practicability are strong.
Drawings
The utility model will be further described with reference to the accompanying drawings, in which:
FIG. 1 is a schematic circuit diagram of one embodiment of the present utility model;
FIG. 2 is a circuit diagram of a photovoltaic thyristor and a bidirectional thyristor according to one embodiment of the utility model;
FIG. 3 is a pin diagram of a master control chip according to one embodiment of the present utility model;
FIG. 4 is a level shifter circuit diagram according to one embodiment of the present utility model;
FIG. 5 is a diagram of a 12V to 5V DC step-down circuit according to one embodiment of the present utility model;
FIG. 6 is a diagram of a 5V to 3.3V DC step-down circuit according to one embodiment of the present utility model;
FIG. 7 is a circuit diagram of an RS485 interface according to one embodiment of the utility model;
FIG. 8 is a circuit diagram of an RS232 interface according to one embodiment of the utility model;
FIG. 9 is a circuit diagram of a communication interface according to one embodiment of the present utility model;
fig. 10 is a circuit diagram of a limiting interface according to one embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 10, in one embodiment of the present utility model, an optocoupler isolated motor driving device is specifically disclosed, and is used for driving a motor to work to drive a controlled device to rise or fall, and specifically includes a driving circuit, a control circuit and a power supply circuit.
Referring to fig. 1, L and N are interfaces for 220V motor power, and L1 and L2 are control interfaces for external motor up and down. The motor includes a first control interface L1 and a second control interface L2.
Referring to fig. 2, the driving circuit includes a first level conversion circuit, a first photo-thyristor and a first bidirectional thyristor connected in sequence, and a second level conversion circuit, a second photo-thyristor and a second bidirectional thyristor connected in sequence; the output end of the first photoelectric silicon controlled rectifier is connected with the gate electrode of the first bidirectional silicon controlled rectifier; the output end of the second photoelectric silicon controlled rectifier is connected with the gate electrode of the second bidirectional silicon controlled rectifier; the two main terminals of the first bidirectional thyristor are respectively and electrically connected with the power interface L and the first control interface L1, and the two main terminals of the second photoelectric thyristor are respectively and electrically connected with the power interface L and the second control interface L2. The steering of the motor is controlled through the bidirectional silicon controlled rectifier, and the drive IC is replaced by the level conversion circuit, so that the cost is saved, and the use effect is good; and the circuit is relatively simple, and the stability and the practicability are strong.
The model of the photo-thyristor in this embodiment is everlight EL3063, and the model of the bidirectional thyristor is WeEn-BT134-600E. The two bidirectional thyristors are used for controlling the start and stop of the motor, and the forward rotation and the reverse rotation, namely the ascending and descending in the embodiment. The strong current and weak current separation is realized through the two optocoupler chips, strong current is driven and controlled by weak current, interference of the strong current to the weak current is avoided, and meanwhile, the safety of the circuit is also improved. Meanwhile, the motor jitter influence caused by directly controlling the start and stop of the motor through the switch is avoided.
Referring to fig. 3 and 4, the control circuit includes a main control chip and a matching circuit thereof, the main control chip in this embodiment adopts an N32G030K8L7 (LQFP 32) chip, and directly uses a clock circuit built in the main control chip, a first output I/O port I1 of the main control chip is connected to the first level conversion circuit, and a second output I/O port I2 is connected to the second level conversion circuit. The output end O1 of the first level conversion circuit is connected to the input end of the first silicon controlled rectifier, and the output end O2 of the second level conversion circuit is connected to the input end of the second silicon controlled rectifier.
IN some other embodiments, the clock circuit of the master chip may also be externally connected to an 8MHz passive crystal oscillator by using an OSC IN pin and an OSC OUT pin.
Referring to fig. 10, the embodiment further includes a limit circuit electrically connected to the IR-OUT-UP pin and the IR-OUT-DOWN pin of the main control chip. The limit circuit includes two sensors for limiting motor travel and associated circuitry, and disclosed in fig. 10 is an HP2.0-4V receptacle for an external sensor, and associated circuitry for the sensor. The limiting interface circuit is externally connected to the sensor, and limiting control of motor work is performed through signals fed back by the sensor; the other pins are communication pins and are mainly communicated with other external devices or interfaces.
The working process of the part is as follows: when an external control signal is input into the main control chip, the main control chip carries out recognition processing on the signal, after the processing is finished, the control signal is output to the strong electric control circuit through the PA11 pin and the PB3 pin of the main control chip, then the motor is controlled to be in a lifting state, a lifting state and a stopping state, and when the motor is lifted or fallen to an external sensor acquisition point, the external sensor feeds back the signal to the main control chip to enable the main control chip to stop outputting the lifting or falling control signal, so that the limiting control function is achieved.
Referring to fig. 5 and 6, the power supply circuit is electrically connected with the driving circuit and the control circuit. The U2 chip of FIG. 5 employs an SCT2630STER (ESOP-8) chip, the U1 chip of FIG. 6 employs an MPS-MP1601NGTF (SOT 563) chip, the present embodiment employs a 12V DC input, a 12V step-down output 5V DC output is provided through a power circuit, and the 5V is further stepped down to a 3.3V DC output to power the circuits of the present embodiment.
Referring to fig. 9, the embodiment further includes an interface circuit, where the interface circuit includes a bus interface circuit for inputting a control signal as shown in fig. 9, and the bus interface circuit is electrically connected to the main control chip, where one end of the bus interface circuit is provided with a pin bus interface for communication with other circuit boards, and in this embodiment, the U10 uses a MAXIM-MAX232ESE (SO-16) chip, SO that the bus interface circuit uses an RS232 protocol to perform communication.
Referring to fig. 7 and 8, the interface circuit further includes two network interfaces, an RS485 interface circuit shown in fig. 7 and an RS232 interface circuit shown in fig. 8, wherein U5 adopts a MAXIM-MAX3485ESA (SO-8) chip, U6 adopts a MAXIM-MAX232ESE (SO-16) chip, and the two network interfaces are electrically connected with the main control chip through the RS485 interface circuit and the RS232 interface circuit respectively.
The interface circuit also comprises a downloading interface circuit which is respectively connected with the SW DIO pin, the SW CLK pin and the NRST pin of the main control chip through socket pins.
The interface circuits can all input external control signals.
The embodiment also comprises control buttons, and external control signals are input through three control buttons directly connected with the KEY DOWN MCU pin, the KEY STOP MCU pin and the KEY UP MCU pin of the main control chip.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are not to be construed as limiting the scope of the utility model. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. An optocoupler isolated motor driving device is used for driving a motor to work, and the motor comprises a first control interface, a second control interface and a power interface for supplying power to the motor, and is characterized by comprising a driving circuit, a control circuit and a power supply circuit;
the driving circuit comprises a first level conversion circuit, a first photoelectric silicon controlled rectifier and a first bidirectional silicon controlled rectifier which are sequentially connected, and a second level conversion circuit, a second photoelectric silicon controlled rectifier and a second bidirectional silicon controlled rectifier which are sequentially connected; the output end of the first photoelectric silicon controlled rectifier is connected with the gate electrode of the first bidirectional silicon controlled rectifier; the output end of the second photoelectric silicon controlled rectifier is connected with the gate electrode of the second bidirectional silicon controlled rectifier; one of the main terminals of the first bidirectional thyristor is electrically connected with the power interface, the other main terminal is electrically connected with the first control interface, one of the main terminals of the second photoelectric thyristor is electrically connected with the power interface, and the other main terminal is electrically connected with the second control interface;
the control circuit comprises a main control chip, a first output I/O port of the main control chip is connected with the first level conversion circuit, and a second output I/O port of the main control chip is connected with the second level conversion circuit;
the power supply circuit is electrically connected with the driving circuit and the control circuit.
2. The optocoupler isolated motor drive of claim 1, wherein the model of the optoelectronics is EL3063 and the model of the bidirectional thyristor is BT134-600E.
3. The optocoupler isolated motor drive of claim 1, further comprising a limit circuit, wherein the limit circuit is electrically connected to the input I/O port of the main control chip.
4. An optocoupler isolated motor drive according to claim 3, wherein the limit circuit is two sensors for limiting the travel of the motor.
5. The optocoupler isolated motor drive of claim 1, further comprising an interface circuit, the interface circuit comprising a bus interface circuit for inputting control signals, the bus interface circuit being electrically connected to the master control chip.
6. The optocoupler isolated motor drive of claim 5, wherein the interface circuit comprises two network interfaces, an RS485 interface circuit and an RS232 interface circuit, and the two network interfaces are electrically connected with the main control chip through the RS485 interface circuit and the RS232 interface circuit, respectively.
7. The optocoupler isolated motor drive of claim 5, wherein the interface circuit further comprises a download interface circuit electrically connected to the host chip and a pin socket, the download interface circuit electrically connected to the pin socket.
8. The optocoupler isolated motor drive of claim 1, wherein the master chip is an N32G030K8L7 chip.
9. The optocoupler isolated motor drive of claim 1, further comprising a control button circuit electrically connected to three of the I/O ports O of the main control chip.
10. The optocoupler isolated motor drive of claim 1, wherein the first level shifter circuit and the second level shifter circuit are single level shifter discrete circuits implemented using transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320507828.0U CN219643754U (en) | 2023-03-15 | 2023-03-15 | Motor driving device with optical coupler isolation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320507828.0U CN219643754U (en) | 2023-03-15 | 2023-03-15 | Motor driving device with optical coupler isolation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219643754U true CN219643754U (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320507828.0U Active CN219643754U (en) | 2023-03-15 | 2023-03-15 | Motor driving device with optical coupler isolation function |
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| Country | Link |
|---|---|
| CN (1) | CN219643754U (en) |
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2023
- 2023-03-15 CN CN202320507828.0U patent/CN219643754U/en active Active
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