CN216134441U - Stepping motor drive circuit and stepping motor driver - Google Patents
Stepping motor drive circuit and stepping motor driver Download PDFInfo
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- CN216134441U CN216134441U CN202122131401.9U CN202122131401U CN216134441U CN 216134441 U CN216134441 U CN 216134441U CN 202122131401 U CN202122131401 U CN 202122131401U CN 216134441 U CN216134441 U CN 216134441U
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Abstract
The utility model provides a stepping motor driving circuit and a stepping motor driver. The stepping motor driving circuit realizes the voltage value conversion of the driving voltage by installing the optical coupler in the stepping motor driver, so that the stepping motor driver has stronger adaptability to the driving signal. The stepping motor driving circuit provided by the technical scheme of the utility model comprises a pulse signal circuit and a stepping motor driver, wherein the pulse signal circuit comprises a programmable logic controller, and the programmable logic controller outputs a pulse control signal to the stepping motor driver; the stepper motor driver comprises an optical coupler, the optical coupler is arranged at the input end of the stepper motor driver and receives a pulse control signal output by the programmable logic controller to the stepper motor driver.
Description
Technical Field
The utility model relates to the technical field of stepping motors, in particular to a stepping motor driving circuit and a stepping motor driver.
Background
Due to the circuit structure characteristics of the stepping motor, the stepping motor cannot be used under a conventional direct current or alternating current power supply like a common direct current motor and an ordinary alternating current motor, but the rotating speed and the rotating acceleration of the stepping motor are controlled by a corresponding stepping motor driver through controlling the pulse frequency, so that the purpose of speed regulation is achieved.
When a stepper motor driver comes to the market, it is usually supplied with a pulsed drive signal by a pulse generator. With the development of computer technology, a Programmable Logic Controller (PLC) is produced, and because the PLC adopts a large-scale integrated circuit technology, the PLC has the advantages of strong anti-interference performance, complete functions, strong applicability, low power consumption and the like, and is also a better choice for a controller for sending pulse driving signals to a stepper motor driver. The output voltage of a Programmable Logic Controller (PLC) is typically 24V or higher. The stepping motor driver can adapt to the driving voltage which is 5V, and the difference between the two is large.
In the prior art, when a Programmable Logic Controller (PLC) is used to provide a driving voltage for a stepping motor driver, a 5V dc power supply is usually connected externally to provide the driving voltage for the stepping motor driver. However, this also causes problems such as complexity of the layout structure and increase in cost.
Therefore, it is desirable to provide a technical solution that can solve the problem of voltage difference between the driver of the stepping motor and the driving voltage providing circuit thereof.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a stepping motor driving circuit and a stepping motor driver. The stepping motor driving circuit realizes the voltage value conversion of the driving voltage by installing the optical coupler in the stepping motor driver, so that the stepping motor driver has stronger adaptability to the driving signal.
The stepping motor driving circuit provided in the technical scheme of the utility model comprises a pulse signal circuit and a stepping motor driver, wherein,
the pulse signal circuit comprises a programmable logic controller which outputs a pulse control signal to the stepping motor driver;
the stepper motor driver comprises an optical coupler, the optical coupler is arranged at the input end of the stepper motor driver and receives a pulse control signal output by the programmable logic controller to the stepper motor driver.
In the above stepping motor driving circuit, the pulse signal circuit programmable logic controller is configured to send a pulse control signal to the stepping motor driver to drive and control the stepping motor driver. And the input end of the stepping motor driver is provided with the optical coupler, the input and the output of the optical coupler are separated by the self electric-optical-electric conversion function of the optical coupler, so that the level conversion function is realized, the voltage value adjustment of the pulse control signal between the output of the programmable logic controller and the input of the stepping motor driver is realized, the stepping motor driver can be directly connected with the programmable logic controller, the direct driving of the stepping motor driver by the programmable logic controller is realized, and the adaptability of the stepping motor driver to a pulse signal circuit which sends pulse control signals with different voltage values is effectively improved.
In a preferred technical scheme of the utility model, the stepping motor driving circuit further comprises a direct current power supply which is respectively electrically connected with the pulse signal circuit and the stepping motor driver and provides constant voltage and current for the pulse signal circuit and the stepping motor driver.
Specifically, in the technical solution of the present invention, the dc power supply in the stepping motor driving circuit further includes a rectifying and filtering circuit, and the rectifying and filtering circuit is electrically connected to an external ac power supply. The rectification filter circuit converts alternating current input by an external alternating current power supply into direct current, and a user only needs to connect the external alternating current power supply to supply power for the direct current power supply when using the stepping motor driving circuit, because the positive and negative of the alternating current are changed constantly, and the connection of the alternating current power supply does not consider the positive and negative of the power supply, so that the safety problem caused by the fact that the positive and negative of the power supply are reversed when the stepping motor driving circuit is used is avoided.
Preferably, in the step motor driving circuit provided in the technical solution of the present invention, the step motor driver further includes a compatible connector disposed at an input end and/or an output end of the step motor driver. The compatible connector enables the stepping motor driver to be compatible in input/output no matter the input/output pulse signals of the stepping motor driver are PNP type pulse signals and NPN type pulse signals, so that the stepping motor driver can be directly connected with more input/output electric elements of different types and categories.
In the technical scheme of the utility model, the stepping motor driver comprises an optical coupler which is arranged at the input end of the stepping motor driver and receives the pulse control signal output to the stepping motor driver. The optical coupling in the stepping motor driver can adjust the input voltage of the received pulse control signal into the voltage suitable for the stepping motor driver to work and output the voltage to the stepping motor driver, so that the stepping motor driver can be directly connected with pulse signal circuits with different output voltages, and the adaptability of the stepping motor driver is effectively improved. Preferably, the stepping motor driver further comprises a compatible connector provided at an input end and/or an output end of the stepping motor driver.
Preferably, in the technical solution of the present invention, the stepping motor driver further includes a constant current circuit, which is disposed between the input end of the stepping motor driver and the optical coupler, and the current input to the stepping motor driver firstly flows into the constant current circuit, and then flows into the optical coupler after constant current modulation. The constant current circuit can keep the current value of the input optical coupler constant, and damage to the optical coupler caused by high current is avoided.
Drawings
Fig. 1 is a schematic diagram of a stepping motor driving circuit provided in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a preferred stepper motor drive circuit provided in an embodiment of the present invention.
Fig. 3 is a schematic diagram of a stepper motor driver provided in an embodiment of the present invention.
Reference numerals:
the method comprises the steps of 1-a step motor driving circuit, 2-a pulse signal circuit, 3-a step motor driver, 31-a constant current circuit, 4-a programmable logic controller, 5-an optical coupler, 6-a direct current power supply, 61-a rectification filter circuit and 7-a step motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment of the present invention provides a stepping motor driving circuit 1 including a pulse signal circuit 2 and a stepping motor driver 3, wherein,
the pulse signal circuit 2 comprises a programmable logic controller 4, and the programmable logic controller 4 outputs a pulse control signal to the stepping motor driver 3;
the stepping motor driver 3 comprises an optical coupler 5, and the optical coupler 5 is arranged at the input end of the stepping motor driver 3 and receives a pulse control signal output to the stepping motor driver 5 by the programmable logic controller 4.
In the stepping motor driving circuit 1, the pulse signal circuit 2 sends a pulse control signal to the stepping motor driver 3 to drive and control the stepping motor driver 3. The pulse signal circuit 2 sends pulse control signals through the programmable logic controller 4, the programmable logic controller 4 has high-speed pulse output performance, and the rotation of the stepping motor 7 can be controlled by controlling the pulse number, the frequency and the electrifying sequence of each phase winding of the motor.
The stepping motor driver 3 can convert the pulse control signal sent by the pulse signal circuit 2 into an angular displacement signal which can be executed by the stepping motor 7, namely, after the stepping motor driver 3 receives the pulse control signal, the stepping motor 7 is driven to rotate by a fixed angle according to a set direction, so that the stepping motor 7 is driven.
The output voltage of the programmable logic controller 4 in the pulse signal circuit 2 is 24V and higher, while the driving voltage required by the stepping motor driver 3 is usually 5V, so that the pulse control signal output by the programmable logic controller 4 can be directly transmitted to the stepping motor driver 3 in order to adjust the voltage difference between the two, and the input end of the stepping motor driver 3 is provided with the optical coupler 5. The input and output of the optical coupler 5 are separated by the electric-optical-electric conversion function of the optical coupler 5, so that the level conversion function can be realized, the stable and safe transmission can be ensured by the separated electric structure, the response speed of the optical coupler 5 is extremely high, the response delay time is only about 10 microseconds, and the optical coupler is suitable for occasions with high requirements on the response speed. Specifically, in the embodiment of the present invention, the voltage of the pulse control signal output by the programmable logic controller 4, for example, 24V, is the input voltage of the optocoupler 5, and after the electrical-optical-electrical level conversion inside the optocoupler 5, the input voltage 5V of the optocoupler 5 is the voltage value of the input pulse control signal of the stepping motor driver 3. Therefore, the output voltage value adjustment and the input voltage value adjustment of the pulse control signal are completed, so that the stepping motor driver 3 can be directly connected with the programmable logic controller 4, and the programmable logic controller 4 can directly drive the stepping motor driver 3.
It should be noted that, in the embodiment of the present invention, the output voltage of the programmable logic controller 4 may also be other pulse voltage values such as 24V and 36V, and the input voltage of the stepping motor driver 3 may also be adjusted according to the specific model and circuit requirements of the stepping motor driver 3, that is, both the input voltage value and the output voltage value of the optocoupler 5 may be flexibly adjusted according to the actual circuit. Therefore, the stepping motor driver 3 can be directly connected with the pulse signal circuits 2 with different output voltages, and the adaptability of the stepping motor driver 3 is effectively improved.
The optical coupler 5 may be one or more of a resistive optical isolator, a diode-type optical coupler, a transistor-type optical coupler, a high-speed integrated circuit output coupler, a triac coupler, a linear coupler, a photo relay, and other electrical components capable of achieving high-efficiency level conversion.
As shown in fig. 2, in the embodiment of the present invention, the stepping motor driving circuit 1 further includes a dc power supply 6, and the dc power supply 6 is electrically connected to the pulse signal circuit 2 and the stepping motor driver 3, respectively, and supplies constant voltage and current to the pulse signal circuit 2 and the stepping motor driver 3.
Specifically, in the embodiment of the present invention, the dc power supply 6 in the stepping motor driving circuit 1 further includes a rectifying and smoothing circuit 61, and the rectifying and smoothing circuit 61 is electrically connected to an external ac power supply (not shown). The rectifying and filtering circuit 61 converts the alternating current input from the external alternating current power supply into direct current, so that the direct current power supply can directly supply constant voltage and current to the pulse signal circuit 2 and the stepping motor driver 3. And the connection structure can also effectively avoid the problem that the anode and the cathode of the power supply are reversed when the stepping motor driving circuit 1 is connected, and improve the use safety of the stepping motor driving circuit 1. When the user uses the stepping motor driving circuit 1, only an external alternating current power supply needs to be connected to supply power for the direct current power supply 6, and the positive and negative of the alternating current power supply change constantly, so that the positive and negative of the power supply are not considered in the connection of the alternating current power supply.
In a preferred embodiment of the present invention, the stepping motor driver 3 of the stepping motor driving circuit 1 further comprises a compatible connector (not shown) disposed at an input end and/or an output end of the stepping motor driver 3. Due to different internal circuit structures of the programmable logic controller 4, the output pulse control signal may be of a PNP type, an NPN type, or both, and the type of the pulse control signal that the stepping motor 7 can adapt to is different due to different models. The stepping motor driver 3 is used as a bridge device between the programmable logic controller 4 and the stepping motor 7, and can also face the situation that the requirements of the two on the types of pulse signals are different, and a compatible connector capable of adjusting the types of the pulse signals is arranged at the input end and/or the output end of the stepping motor driver 3, so that the types of the pulse signals at the input end and/or the output end of the stepping motor driver 3 are compatible with a PNP type pulse signal and an NPN type pulse signal, and the requirements of connection between different electrical elements are met. For example, the 42-series two-phase stepping motor supports only the NPN type pulse signal, and therefore, the compatible connector is added to the stepping motor driver 3 so as to be able to support the PNP type pulse signal.
Preferably, in the embodiment of the present invention, referring to fig. 2, the stepping motor driving circuit 1 further includes a stepping motor 7 electrically connected to an output terminal of the stepping motor driver 3, receiving a pulse control signal input by the stepping motor driver 3, and converting the received pulse control signal into an angular displacement to control the rotation of a rotor of the stepping motor 7. The stepping motor 7 may be one or more of a single-phase stepping motor, a two-phase stepping motor, a three-phase stepping motor, a multi-phase stepping motor, etc., which are of a reluctance type, a permanent magnet type, and a mixed magnet type.
As shown in fig. 3, in the embodiment of the present invention, there is further provided a stepping motor driver 3, wherein the stepping motor driver 3 includes an optical coupler 5, and the optical coupler 5 is disposed at an input end of the stepping motor driver 3 and receives a pulse control signal output to the stepping motor driver 3. The optical coupler 5 in the stepping motor driver 3 can adjust the input voltage of the received pulse control signal into the voltage suitable for the stepping motor driver 3 to work and output the voltage to the stepping motor driver 3, so that the stepping motor driver 3 can be directly connected with the pulse signal circuits 2 with different output voltages, and the adaptability of the stepping motor driver 3 is effectively improved.
Preferably, the stepping motor driver 3 provided in the embodiment of the present invention further includes a compatible connector (not shown) provided at an input end and/or an output end of the stepping motor driver 3. The compatible connector enables the stepping motor driver 3 to be compatible with input and output of different types of pulse signals, so that the stepping motor driver 3 can be connected with more input and output electric elements of different types and categories.
Further, in the embodiment of the present invention, the stepping motor driver 3 further includes a constant current circuit 31, which is disposed between the input end (at PUL +, PUL-, DIR +, DIR-mark in fig. 3) of the stepping motor driver 31 and the optical coupler 5, and the current input to the stepping motor driver 3 first flows into the constant current circuit 31, and then flows into the optical coupler 5 after being subjected to constant current modulation. The constant current circuit 31 can keep the current value of the input optical coupler 5 constant, and avoid the high current from damaging the optical coupler 5. The constant current circuit 31 may be implemented not only by a triode circuit as shown in fig. 3, but also by a transistor, a voltage regulator, an operational amplifier, and a chip capable of implementing a constant current function, and the like, which is not limited herein.
So far, the technical scheme of the utility model has been described with reference to the attached drawings. However, it will be readily appreciated by those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments described above. Without departing from the principle of the utility model, one skilled in the art can make equivalent changes or substitutions on the related technical features, and the technical solutions after the changes or substitutions will fall into the protection scope of the utility model.
Claims (5)
1. A stepping motor driving circuit comprises a pulse signal circuit and a stepping motor driver, and is characterized in that,
the pulse signal circuit comprises a programmable logic controller, and the programmable logic controller outputs a pulse control signal to the stepping motor driver;
the stepping motor driver comprises an optical coupler, and the optical coupler is arranged at the input end of the stepping motor driver and used for receiving the pulse control signal;
the stepping motor driver also comprises a compatible connector which is arranged at the input end of the stepping motor driver and/or the output end of the stepping motor driver.
2. The stepping motor driving circuit according to claim 1, further comprising a direct current power supply electrically connected to said pulse signal circuit and said stepping motor driver, respectively.
3. The stepping motor driving circuit according to claim 2, further comprising a rectifying and smoothing circuit in said dc power supply, said rectifying and smoothing circuit being electrically connected to an external ac power supply.
4. The utility model provides a step motor driver, its characterized in that, include the optical coupler in the step motor driver, the optical coupler set up in step motor driver's input, the optical coupler receive to the pulse control signal of step motor driver output, still include compatible connector in the step motor driver, set up in step motor driver's input and/step motor driver or output.
5. The stepping motor driver as claimed in claim 4, further comprising a constant current circuit provided between an input terminal of said stepping motor driver and said photo coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122131401.9U CN216134441U (en) | 2021-09-03 | 2021-09-03 | Stepping motor drive circuit and stepping motor driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122131401.9U CN216134441U (en) | 2021-09-03 | 2021-09-03 | Stepping motor drive circuit and stepping motor driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216134441U true CN216134441U (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122131401.9U Active CN216134441U (en) | 2021-09-03 | 2021-09-03 | Stepping motor drive circuit and stepping motor driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216134441U (en) |
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2021
- 2021-09-03 CN CN202122131401.9U patent/CN216134441U/en active Active
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