CN215393072U - Drive circuit of wire feeder - Google Patents
Drive circuit of wire feeder Download PDFInfo
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- CN215393072U CN215393072U CN202120857303.0U CN202120857303U CN215393072U CN 215393072 U CN215393072 U CN 215393072U CN 202120857303 U CN202120857303 U CN 202120857303U CN 215393072 U CN215393072 U CN 215393072U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a wire feeder driving circuit, wherein the wire feeder comprises a controller and a wire feeding motor, and the wire feeder comprises: the input end of the full-bridge inverter circuit inputs direct current wire feeding voltage, and the output end of the full-bridge inverter circuit is connected with the wire feeding motor and used for outputting alternating current wire feeding voltage to the wire feeding motor; the input end of the driving module is connected with the controller, and the output end of the driving module is respectively connected with the control end of the full-bridge inverter circuit; and the input end of the current sampling circuit is connected with the full-bridge inverter circuit, and the output end of the current sampling circuit is connected with the controller and used for collecting a motor rotating speed feedback signal of the wire feeding motor and feeding the motor rotating speed feedback signal back to the controller. The utility model can realize the positive and negative rotation of the wire feeding motor, and the rotating speed is easy to adjust; and the circuit structure is simple, the volume is small, and the lightening of the wire feeder and the welding machine is facilitated.
Description
Technical Field
The utility model relates to the technical field of wire feeders, in particular to a wire feeder driving circuit.
Background
The gas shielded welding machine during operation need send the silk through sending the silk machine, send the silk machine to adopt and send a drive circuit drive to send the silk machine work, among the prior art, send a drive circuit and generally all adopt switching power supply Pulse Width Modulation (PWM) control chip, and this kind of drive circuit can only drive and send a machine corotation, can not realize the reversal. For the gas shielded welding machine with pulse arcing, the wire feeder needs to rotate forwards and reversely, so that the driving circuit of the wire feeder in the prior art cannot be applied to the gas shielded welding machine with pulse arcing.
SUMMERY OF THE UTILITY MODEL
According to an embodiment of the present invention, there is provided a wire feeder drive circuit, the wire feeder including a controller and a wire feed motor, comprising:
the input end of the full-bridge inverter circuit inputs direct current wire feeding voltage, and the output end of the full-bridge inverter circuit is connected with the wire feeding motor and used for outputting alternating current wire feeding voltage to the wire feeding motor;
the input end of the driving module is connected with the controller, and the output end of the driving module is respectively connected with the control end of the full-bridge inverter circuit;
and the input end of the current sampling circuit is connected with the full-bridge inverter circuit, and the output end of the current sampling circuit is connected with the controller and used for collecting a motor rotating speed feedback signal of the wire feeding motor and feeding the motor rotating speed feedback signal back to the controller.
Further, the method also comprises the following steps: direct current voltage stabilizing circuit, direct current voltage stabilizing circuit contains: the device comprises a direct current filter capacitor, a transient suppression diode, an electrolytic capacitor and a diode;
the direct current filter capacitor, the transient suppression diode and the electrolytic capacitor are connected in parallel to form a parallel circuit, one end of the parallel circuit is grounded, and the other end of the parallel circuit outputs direct current wire feeding voltage;
the anode of the diode is connected with the DC high level, and the cathode outputs the DC wire feeding voltage.
Further, the full-bridge inverter circuit includes: the field effect transistor comprises a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor;
the drain electrode of the first field effect tube is connected with the drain electrode of the third field effect tube and is connected with the direct current wire feeding voltage, the source electrode of the first field effect tube is connected with the drain electrode of the second field effect tube, the source electrode of the third field effect tube is connected with the drain electrode of the fourth field effect tube, the source electrode of the second field effect tube is connected with the source electrode of the fourth field effect tube, and the source electrode of the first field effect tube and the source electrode of the third field effect tube are respectively connected with the wire feeding motor.
Further, the driving module includes: the driving circuit comprises a first half-bridge driving chip and a second half-bridge driving chip;
the high-voltage output end and the low-voltage output end of the first half-bridge driving chip are respectively and correspondingly connected with the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor;
and the high-voltage output end and the low-voltage output end of the second half-bridge driving chip are respectively and correspondingly connected with the grid electrode of the third field-effect tube and the grid electrode of the fourth field-effect tube.
Further, the driving module further comprises: the current limiting circuit comprises a first current limiting resistor, a second current limiting resistor, a third current limiting resistor and a fourth current limiting resistor;
the first current limiting resistor is connected between the high-voltage output end of the first half-bridge driving chip and the grid electrode of the first field effect transistor;
the second current-limiting resistor is connected between the low-voltage output end of the first half-bridge driving chip and the grid electrode of the second field effect transistor;
the third current limiting resistor is connected between the high-voltage output end of the second half-bridge driving chip and the grid electrode of the third field effect transistor;
and the fourth current-limiting resistor is connected between the low-voltage output end of the second half-bridge driving chip and the grid electrode of the fourth field effect transistor.
Further, the driving module further comprises: and the inverter circuit is connected between the input end of the second half-bridge driving chip and the controller, the controller inputs the wire feeding speed given signal to the first half-bridge driving chip and the inverter circuit, and the inverter circuit inverts the wire feeding speed given signal and inputs the inverted wire feeding speed given signal to the second half-bridge driving chip.
Further, the inverter circuit includes: a fifth field effect transistor and a divider resistor; the divider resistor is connected between the drain electrode of the fifth field effect transistor and a high level; and the grid electrode of the fifth field effect transistor is connected with the controller, the drain electrode of the fifth field effect transistor is connected with the input end of the second half-bridge driving chip, and the source electrode of the fifth field effect transistor is grounded.
Further, the current sampling circuit includes:
one end of the sampling resistor is grounded, the other end of the sampling resistor is connected with the source electrode of the fourth field effect transistor, and a motor rotating speed feedback signal of the wire feeding motor is acquired;
and the input end of the sampling filter is connected with the other end of the sampling resistor, and the output end of the sampling filter is connected with the controller.
Furthermore, the sampling filter comprises a sampling filter resistor and a sampling filter capacitor which are connected in series, the two ends of the sampling filter resistor are respectively connected with the other end of the sampling resistor and the controller, one end of the sampling filter capacitor is connected with the controller, and the other end of the sampling filter capacitor is grounded.
According to the wire feeder driving circuit disclosed by the embodiment of the utility model, the forward and reverse rotation of the wire feeding motor can be realized, and the rotating speed is easy to adjust; and the circuit structure is simple, the volume is small, and the lightening of the wire feeder and the welding machine is facilitated.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.
Drawings
FIG. 1 is a functional block diagram of a wire feeder drive circuit according to an embodiment of the present invention;
FIG. 2 is a circuit schematic of a wire feeder drive circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.
First, a wire feeder driving circuit according to an embodiment of the present invention will be described with reference to fig. 1 to 2, which is used for a gas shielded welding machine, especially a pulse arc welding machine, where the gas shielded welding machine uses a wire feeder to perform wire feeding, and the wire feeder uses a controller MCU to control a wire feeding motor M to perform a wire feeding task, and the application scenarios of the wire feeder driving circuit are wide.
As shown in fig. 1, the wire feeder driving circuit according to the embodiment of the present invention includes: the wire feeding device comprises a full-bridge inverter circuit 1, a driving module 2 and a current sampling circuit 4, wherein the input end of the full-bridge inverter circuit 1 inputs direct current wire feeding voltage V _ MOTOR, and the output end of the full-bridge inverter circuit is connected with a wire feeding MOTOR M and used for outputting alternating current wire feeding voltage to the wire feeding MOTOR M; the input end of the driving module 2 is connected with the controller MCU, and the output end of the driving module 2 is respectively connected with the control end of the full-bridge inverter circuit 1 and used for providing driving signals for the full-bridge inverter circuit 1; the current sampling circuit 4 is used for collecting a MOTOR rotating speed feedback signal CFB _ WIRE _ MOTOR of the WIRE feeding MOTOR M for the control of the controller MCU.
Further, in the present embodiment, as shown in fig. 1 to 2, the wire feeder driving circuit of the present embodiment further includes a dc voltage stabilizing circuit 3, which includes: the direct current filter capacitor C1, the transient suppression diode D1, the electrolytic capacitor C2 and the diode D2; the direct current filter capacitor C1, the transient suppression diode D1 and the electrolytic capacitor C2 are mutually connected in parallel to form a parallel circuit, one end of the parallel circuit is grounded, and the other end of the parallel circuit outputs direct current wire feeding voltage V _ MOTOR, wherein the direct current filter capacitor C1 filters the direct current wire feeding voltage V _ MOTOR, the transient suppression diode D1 is used for eliminating voltage spikes generated during switching, and the electrolytic capacitor C2 is used for storing energy to stabilize the direct current wire feeding voltage V _ MOTOR; the diode D2 has an anode connected to the dc high level, and a cathode outputting a dc wire feeding voltage V _ MOTOR for preventing the induced potential of the wire feeding MOTOR M from affecting the power supply, in this embodiment, the dc high level is 24V.
Specifically, as shown in fig. 2, the full-bridge inverter circuit 1 includes: a first fet T1, a second fet T2, a third fet T3, and a fourth fet T4. The drain electrode of the first field effect transistor T1 is connected with the drain electrode of the third field effect transistor T3 and is connected with a direct current wire feeding voltage V _ MOTOR, the source electrode of the first field effect transistor T1 is connected with the drain electrode of the second field effect transistor T2, the source electrode of the third field effect transistor T3 is connected with the drain electrode of the fourth field effect transistor T4, the source electrode of the second field effect transistor T2 is connected with the source electrode of the fourth field effect transistor T4, and the source electrode of the first field effect transistor T1 and the source electrode of the third field effect transistor T3 are respectively connected with the wire feeding MOTOR M.
Specifically, as shown in fig. 2, the driving module 2 includes: a first half-bridge driver chip U1 and a second half-bridge driver chip U2; the high-voltage output end and the low-voltage output end of the first half-bridge driving chip U1 are correspondingly connected with the grid electrode of the first field-effect tube T1 and the grid electrode of the second field-effect tube T2 respectively; the high-voltage output end and the low-voltage output end of the second half-bridge driving chip U2 are correspondingly connected with the gate of the third field-effect tube T3 and the gate of the fourth field-effect tube T4, respectively.
Further, as shown in fig. 2, the driving module 2 further includes: the first current limiting resistor R1, the second current limiting resistor R2, the third current limiting resistor R3 and the fourth current limiting resistor R4 are respectively used for limiting the current of the driving circuits of the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor. The first current limiting resistor R1 is connected between the high-voltage output end of the first half-bridge driving chip U1 and the grid of the first field-effect transistor T1; the second current limiting resistor R2 is connected between the low-voltage output end of the first half-bridge driving chip U1 and the grid electrode of the second field effect transistor T2; the third current limiting resistor R3 is connected between the high-voltage output end of the second half-bridge driving chip U2 and the grid electrode of the third field-effect tube T3; the fourth current limiting resistor R4 is connected between the low voltage output terminal of the second half-bridge driving chip U2 and the gate of the fourth fet T4.
Further, as shown in fig. 2, the driving module 2 further includes: and the inverter circuit 21 is connected between the input end of the second half-bridge driver chip U2 and the controller MCU, the controller MCU inputs the WIRE feeding speed setting signal WIRE _ FEEDER to the first half-bridge driver chip U1 and the inverter circuit 21, and the inverter circuit inverts the WIRE feeding speed setting signal WIRE _ FEEDER and inputs the inverted WIRE feeding speed setting signal WIRE _ FEEDER to the second half-bridge driver chip U2. The inverter circuit 21 includes: a fifth field effect transistor T5 and a voltage dividing resistor R5; the voltage dividing resistor R5 is connected between the drain of the fifth field effect transistor T5 and the high level VCC; the grid electrode of the fifth field effect transistor T5 is connected with the controller MCU, the drain electrode is connected with the input end of the second half-bridge driving chip U2, and the source electrode is grounded.
Specifically, in the present embodiment, as shown in fig. 2, the input terminal of the current sampling circuit 4 is connected to the source of the fourth fet T4, and the output terminal is connected to the controller MCU. The current sampling circuit 4 includes: the sampling resistor R6 and the sampling filter 41, wherein one end of the sampling resistor R6 is grounded, and the other end is connected with the source electrode of the fourth field effect transistor T4 and is used for collecting a MOTOR rotating speed feedback signal CFB _ WIRE _ MOTOR; the input end of the sampling filter 41 is connected to the other end of the sampling resistor R6, and the output end is connected to the controller MCU, and is configured to filter the MOTOR speed feedback signal CFB _ WIRE _ MOTOR.
Further, as shown in fig. 2, the sampling filter 41 includes a sampling filter resistor R7 and a sampling filter capacitor C3 connected in series, two ends of the sampling filter resistor R7 are respectively connected to the other end of the sampling resistor R6 and the controller MCU, one end of the sampling filter capacitor C3 is connected to the controller MCU, and the other end is grounded.
When the full-bridge inverter circuit works, the controller MCU outputs a PWM signal of a WIRE feeding speed given signal WIRE _ FEEDER, the WIRE feeding speed given signal WIRE _ FEEDER is directly used as the input of the first half-bridge driving chip U1 and is used as the input of the second half-bridge driving chip U2 after passing through the inverter circuit 21, so that the input signals of the first half-bridge driving chip U1 and the second half-bridge driving chip U2 are complementary, and four driving signals output by the first half-bridge driving chip U1 and the second half-bridge driving chip U2 can realize the alternate conduction of four field effect transistors of the full-bridge inverter circuit 1, thereby realizing the inversion.
When the duty ratio of a given PWM signal is 50%, the duty ratios of four paths of driving signals output by the first half-bridge driving chip U1 and the second half-bridge driving chip U2 are also 50%, alternating positive and negative voltages obtained by inversion of the full-bridge inverter circuit 1 respectively account for half, and the wire feeding motor M does not rotate; when the duty ratio of the PWM signal is more than 50%, the AC positive voltage obtained by inversion is more than the negative voltage, and the wire feeding motor M rotates forwards; when the duty ratio of the PWM signal is less than 50%, the wire feeding motor M rotates reversely.
The larger the proportion of the AC positive voltage is, the faster the rotating speed of the wire feeding motor M is, the smaller the proportion of the AC positive voltage is, and the slower the rotating speed of the wire feeding motor M is. The rotating speed of the WIRE feeding MOTOR M is fed into the controller MCU through a MOTOR rotating speed feedback signal CFB _ WIRE _ MOTOR acquired by the sampling resistor R6, the controller MCU compares the rotating speed feedback signal with a WIRE feeding speed given signal WIRE _ FEEDER and then adjusts the WIRE feeding speed given signal, and outputs a drive chip turn-off signal SD _ WIRE _ FEEDER to control the first half-bridge drive chip U1 and the second half-bridge drive chip U2, so that the forward and reverse rotation and the rotating speed adjustment of the WIRE feeding MOTOR are realized, the circuit is simple and controllable, the circuit is simple in structure, the size is small, and the portability of the WIRE feeding machine and the welding machine is facilitated.
In the above, with reference to fig. 1 to 2, the wire feeder driving circuit according to the embodiment of the utility model is described, which not only can realize forward and reverse rotation of the wire feeding motor, but also is easy to adjust the rotating speed; and the circuit structure is simple, the volume is small, and the lightening of the wire feeder and the welding machine is facilitated.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the utility model. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the utility model should be determined from the following claims.
Claims (9)
1. A wire feeder drive circuit, the wire feeder including a controller and a wire feed motor, comprising:
the input end of the full-bridge inverter circuit inputs direct current wire feeding voltage, and the output end of the full-bridge inverter circuit is connected with the wire feeding motor and used for outputting alternating current wire feeding voltage to the wire feeding motor;
the input end of the driving module is connected with the controller, and the output end of the driving module is respectively connected with the control end of the full-bridge inverter circuit;
and the input end of the current sampling circuit is connected with the full-bridge inverter circuit, and the output end of the current sampling circuit is connected with the controller and used for collecting a motor speed feedback signal of the wire feeding motor and feeding the motor speed feedback signal back to the controller.
2. The wire feeder drive circuit of claim 1, further comprising: a DC voltage regulator circuit, the DC voltage regulator circuit comprising: the device comprises a direct current filter capacitor, a transient suppression diode, an electrolytic capacitor and a diode;
the direct current filter capacitor, the transient suppression diode and the electrolytic capacitor are connected in parallel to form a parallel circuit, one end of the parallel circuit is grounded, and the other end of the parallel circuit outputs direct current wire feeding voltage;
the anode of the diode is connected with a direct current high level, and the cathode of the diode outputs direct current wire feeding voltage.
3. The wire feeder drive circuit of claim 1, wherein the full bridge inverter circuit comprises: the field effect transistor comprises a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor;
the drain electrode of the first field effect tube and the drain electrode of the third field effect tube are connected and connected with a direct current wire feeding voltage, the source electrode of the first field effect tube is connected with the drain electrode of the second field effect tube, the source electrode of the third field effect tube is connected with the drain electrode of the fourth field effect tube, the source electrode of the second field effect tube is connected with the source electrode of the fourth field effect tube, and the source electrode of the first field effect tube and the source electrode of the third field effect tube are respectively connected with the wire feeding motor.
4. The wire feeder drive circuit of claim 3, wherein the drive module comprises: the driving circuit comprises a first half-bridge driving chip and a second half-bridge driving chip;
the high-voltage output end and the low-voltage output end of the first half-bridge driving chip are respectively and correspondingly connected with the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor;
and the high-voltage output end and the low-voltage output end of the second half-bridge driving chip are respectively and correspondingly connected with the grid electrode of the third field effect transistor and the grid electrode of the fourth field effect transistor.
5. The wire feeder drive circuit of claim 4, wherein the drive module further comprises: the current limiting circuit comprises a first current limiting resistor, a second current limiting resistor, a third current limiting resistor and a fourth current limiting resistor;
the first current limiting resistor is connected between the high-voltage output end of the first half-bridge driving chip and the grid electrode of the first field effect transistor;
the second current-limiting resistor is connected between the low-voltage output end of the first half-bridge driving chip and the grid electrode of the second field effect transistor;
the third current limiting resistor is connected between the high-voltage output end of the second half-bridge driving chip and the grid electrode of the third field effect transistor;
and the fourth current-limiting resistor is connected between the low-voltage output end of the second half-bridge driving chip and the grid electrode of the fourth field effect transistor.
6. The wire feeder drive circuit of claim 4, wherein the drive module further comprises: and the phase-inverting circuit is connected between the input end of the second half-bridge driving chip and the controller, the controller inputs a wire feeding speed given signal to the first half-bridge driving chip and the phase-inverting circuit, and the wire feeding speed given signal is input to the second half-bridge driving chip after being inverted by the phase-inverting circuit.
7. The wire feeder drive circuit of claim 6, wherein the inverter circuit comprises: a fifth field effect transistor and a divider resistor; the voltage division resistor is connected between the drain electrode of the fifth field effect transistor and a high level; and the grid electrode of the fifth field effect transistor is connected with the controller, the drain electrode of the fifth field effect transistor is connected with the input end of the second half-bridge driving chip, and the source electrode of the fifth field effect transistor is grounded.
8. The wire feeder drive circuit of claim 3, wherein the current sampling circuit comprises:
one end of the sampling resistor is grounded, the other end of the sampling resistor is connected with the source electrode of the fourth field effect transistor, and a motor rotating speed feedback signal of the wire feeding motor is acquired;
and the input end of the sampling filter is connected with the other end of the sampling resistor, and the output end of the sampling filter is connected with the controller.
9. The wire feeder driving circuit according to claim 8, wherein the sampling filter comprises a sampling filter resistor and a sampling filter capacitor connected in series, the sampling filter resistor is connected at two ends thereof to the other end of the sampling resistor and the controller, respectively, and the sampling filter capacitor is connected at one end thereof to the controller and at the other end thereof to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120857303.0U CN215393072U (en) | 2021-04-25 | 2021-04-25 | Drive circuit of wire feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120857303.0U CN215393072U (en) | 2021-04-25 | 2021-04-25 | Drive circuit of wire feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215393072U true CN215393072U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120857303.0U Active CN215393072U (en) | 2021-04-25 | 2021-04-25 | Drive circuit of wire feeder |
Country Status (1)
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| CN (1) | CN215393072U (en) |
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2021
- 2021-04-25 CN CN202120857303.0U patent/CN215393072U/en active Active
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