阅读说明：本技术 电源系统及织机 (Power supply system and loom ) 是由 金茜 于 2020-06-09 设计创作，主要内容包括：本发明实施例提供了一种电源系统及织机,所述电源系统包括整流单元、第一直流变压单元和第二直流变压单元,且所述电源系统通过所述整流单元连接外部交流电源；所述第一直流变压单元的输入端连接到所述整流单元的直流输出端,并将所述整流单元的输出电压转换为预设直流电压后输出；所述第二直流变压单元包括用于连接所述储纬器电机的第一电压输出端,且所述第二直流变压单元的输入端与所述第一直流变压单元的输出端连接,并将所述第一直流变压单元输出的预设直流电压转换为第一电压后,通过所述第一电压输出端输出。本发明实施例可减小整个电源系统的体积、减少电路接口、降低成本,并且无需改线即可适应不同电压的电网。(The embodiment of the invention provides a power supply system and a weaving machine, wherein the power supply system comprises a rectifying unit, a first direct current voltage transformation unit and a second direct current voltage transformation unit, and is connected with an external alternating current power supply through the rectifying unit; the input end of the first direct current voltage conversion unit is connected to the direct current output end of the rectification unit, and the output voltage of the rectification unit is converted into preset direct current voltage and then is output; the second direct current transformation unit comprises a first voltage output end used for being connected with the weft accumulator motor, the input end of the second direct current transformation unit is connected with the output end of the first direct current transformation unit, and after the preset direct current voltage output by the first direct current transformation unit is converted into the first voltage, the first voltage is output through the first voltage output end. The embodiment of the invention can reduce the volume of the whole power supply system, reduce circuit interfaces and reduce cost, and can adapt to power grids with different voltages without changing the line.)

1. A power supply system is used for supplying power to an internal power device of a weaving machine, the internal power device of the weaving machine comprises first equipment, and the power supply system is characterized by comprising a rectifying unit, a first direct current voltage transformation unit and a second direct current voltage transformation unit, and the power supply system is connected with an external alternating current power supply through the alternating current side of the rectifying unit;

the input end of the first direct current voltage conversion unit is connected to the direct current output end of the rectification unit, and the output voltage of the rectification unit is converted into preset direct current voltage and then is output; the second direct current transformation unit comprises a first voltage output end used for being connected with the first equipment, the input end of the second direct current transformation unit is connected with the output end of the first direct current transformation unit, and after the preset direct current voltage output by the first direct current transformation unit is converted into the first voltage, the first voltage is output through the first voltage output end.

2. The power supply system according to claim 1, wherein the internal power consumption device of the loom includes a second device, the second dc transforming unit includes a second voltage output terminal for connecting the second device, and the second dc transforming unit converts the preset dc voltage output by the first dc transforming unit into a second voltage and outputs the second voltage through the second voltage output terminal.

3. The power supply system according to claim 2, wherein the internal power consumption device of the loom includes a third device, the second dc transforming unit includes a third voltage output terminal for connecting to the third device, and the second dc transforming unit converts the preset dc voltage outputted from the first dc transforming unit into the third voltage and outputs the third voltage through the third voltage output terminal.

4. The power supply system of claim 3, wherein the first DC voltage transformation unit comprises a non-isolated DC voltage reduction circuit and the second DC voltage transformation unit comprises an isolated DC voltage transformation circuit with multiplexed outputs.

5. The power supply system according to claim 3, wherein the first device comprises a weft accumulator motor, and the second device comprises a yarn gripper and a diverter valve;

the third device comprises any one or more of: the fan overheating alarm unit, the main motor overheating alarm unit and the display screen.

6. The power supply system according to claim 3, wherein the internal power consumption device of the loom includes a control circuit, the power supply system includes a third direct current transforming unit, and the third direct current transforming unit includes a fourth voltage output terminal for connecting the control circuit;

the input end of the third direct current transformation unit is connected with the direct current output end of the rectification unit, and the output voltage of the rectification unit is converted into a fourth voltage and then is output through the fourth voltage output end.

7. The power supply system according to claim 3, wherein the internal power consumption device of the loom includes a control circuit, the power supply system includes a third direct current transforming unit, and the third direct current transforming unit includes a fourth voltage output terminal for connecting the control circuit; the input end of the third direct current voltage transformation unit is connected with the output end of the first direct current voltage transformation unit, and the preset direct current voltage output by the first direct current voltage transformation unit is converted into a fourth voltage and then is output through the fourth voltage output end.

8. The power supply system according to claim 3, wherein the power supply system includes a fourth direct current transformation unit and a first unidirectional conduction circuit, and an output terminal of the fourth direct current transformation unit is connected to the third device via the first unidirectional conduction circuit;

the input end of the fourth direct current voltage transformation unit is connected with the output end of the first direct current voltage transformation unit, and outputs the preset direct current voltage output by the first direct current voltage transformation unit through the first one-way conduction circuit; or, the input end of the fourth dc transforming unit is connected to the dc output end of the rectifying unit, and the output voltage of the rectifying unit is converted into the fifth voltage and then output through the first unidirectional conducting circuit.

9. The power supply system according to claim 6 or 7, wherein the third direct current transforming unit includes a second unidirectional conducting circuit, and the third direct current transforming unit is connected to the third device via the second unidirectional conducting circuit; and the third direct current transformation unit converts the output voltage of the rectification unit into the fifth voltage and outputs the fifth voltage through the second one-way conduction circuit.

10. Weaving machine, characterized in that it comprises a power supply system according to any one of claims 1 to 9 and that the power supply system is connected to an internal power consumer of the weaving machine.

Technical Field

The embodiment of the invention relates to the field of textile machinery equipment, in particular to a power supply system and a weaving machine.

Background

Water jet looms are shuttleless looms that use a jet of water to pull the weft through the shed. The friction traction force of the water-jet weft insertion to the weft yarn is larger than that of the air-jet weft insertion, the diffusivity is small, and the requirements of long-wire weft insertion such as synthetic fiber and glass fiber with smooth surfaces are met. Meanwhile, the water spraying weft insertion can increase the conductivity of the synthetic fiber and effectively overcome the static electricity in weaving. In addition, the water spraying weft insertion has the advantages of less consumed energy and lower noise.

With the expansion of the water jet loom market, the demand for high performance miniaturization is increasing. Therefore, the realization of a high-performance integrated electric control system is imperative, and the more simplified controller can effectively optimize the machine layout in a terminal customer factory, and can also guide equipment manufacturers to reduce the volume of an electric control cabinet and reduce the cost.

An integrated electric control system of a water jet loom generally comprises the following components: the weft detecting module, the pattern module, the frequency conversion module, the power supply module, the servo module, the interface and the like. Wherein the power module assumes the responsibility of providing a reliable source of power for the entire system. In order to meet the power supply requirements of different power grids, the power supply module generally adopts 380-480V alternating current for power supply, and an implementation mode of a power frequency transformer is often adopted, as shown in fig. 1. After the fluctuation of the power grid is considered, the change range of the power grid is relatively fast, input terminals of different power grid voltages need to be reserved for inputting of the power frequency transformer, and the power grid with different voltages is adapted by changing wiring.

The whole integrated electric control system needs a plurality of output terminals to be matched with a plurality of rectifying circuits 11 and direct current conversion circuits for realizing power supply with various types and wide distribution, so that the power supply is respectively used for supplying power to a control circuit 12, a brake disc 13, a weft accumulator motor 14, a yarn gripper 15, a steering valve 16, a fan overheating alarm unit 17, a main motor overheating alarm unit 18, a display screen 19 and the like.

The power module not only occupies the larger volume and weight of the whole integrated electric control system, but also introduces complicated circuit connecting lines, needs to consume a large amount of labor to realize circuit connection of loads, and has high maintenance cost.

Disclosure of Invention

The embodiment of the invention provides a power supply system and a loom, aiming at the problems of large volume and weight of a power supply module and complex circuit wiring in the integrated electric control system of the water-jet loom.

The technical solution of the embodiment of the present invention to solve the above technical problem is to provide a power supply system, which is used for supplying power to an internal power consumption device of a loom, wherein the internal power consumption device of the loom includes a first device, the power supply system includes a rectification unit, a first dc voltage transformation unit and a second dc voltage transformation unit, and the power supply system is connected to an external ac power supply through an ac side of the rectification unit;

the input end of the first direct current voltage conversion unit is connected to the direct current output end of the rectification unit, and the output voltage of the rectification unit is converted into preset direct current voltage and then is output; the second direct current transformation unit comprises a first voltage output end used for being connected with the first equipment, the input end of the second direct current transformation unit is connected with the output end of the first direct current transformation unit, and after the preset direct current voltage output by the first direct current transformation unit is converted into the first voltage, the first voltage is output through the first voltage output end.

Preferably, the internal power consumption device of the loom includes a second device, the second dc transforming unit includes a second voltage output terminal for connecting the second device, and the second dc transforming unit converts the preset dc voltage output by the first dc transforming unit into a second voltage and outputs the second voltage through the second voltage output terminal.

Preferably, the internal power consumption device of the loom includes a third device, the second dc transforming unit includes a third voltage output terminal for connecting the third device, and the second dc transforming unit converts the preset dc voltage output from the first dc transforming unit into the third voltage and outputs the third voltage through the third voltage output terminal.

Preferably, the first dc transforming unit includes a non-isolated dc step-down circuit, and the second dc transforming unit includes an isolated dc transforming circuit having multiple outputs.

Preferably, the first device comprises a weft accumulator motor, and the second device comprises a yarn gripper and a steering valve;

the third device comprises any one or more of: the fan overheating alarm unit, the main motor overheating alarm unit and the display screen.

Preferably, the internal power utilization device of the loom comprises a control circuit, the power supply system comprises a third direct current transformation unit, and the third direct current transformation unit comprises a fourth voltage output end for connecting the control circuit;

the input end of the third direct current transformation unit is connected with the direct current output end of the rectification unit, and the output voltage of the rectification unit is converted into a fourth voltage and then is output through the fourth voltage output end.

Preferably, the internal power utilization device of the loom comprises a control circuit, the power supply system comprises a third direct current transformation unit, and the third direct current transformation unit comprises a fourth voltage output end for connecting the control circuit; the input end of the third direct current voltage transformation unit is connected with the output end of the first direct current voltage transformation unit, and the preset direct current voltage output by the first direct current voltage transformation unit is converted into a fourth voltage and then is output through the fourth voltage output end.

Preferably, the power supply system includes a fourth dc transforming unit and a first unidirectional conducting circuit, and an output terminal of the fourth dc transforming unit is connected to the third device via the first unidirectional conducting circuit;

the input end of the fourth direct current voltage transformation unit is connected with the output end of the first direct current voltage transformation unit, and outputs the preset direct current voltage output by the first direct current voltage transformation unit through the first one-way conduction circuit; or, the input end of the fourth dc transforming unit is connected to the dc output end of the rectifying unit, and the output voltage of the rectifying unit is converted into the fifth voltage and then output through the first unidirectional conducting circuit.

Preferably, the third dc transforming unit includes a second unidirectional conducting circuit, and the third dc transforming unit is connected to the third device via the second unidirectional conducting circuit; and the third direct current transformation unit converts the output voltage of the rectification unit into the fifth voltage and outputs the fifth voltage through the second one-way conduction circuit.

The embodiment of the invention also provides the weaving machine, which comprises the power supply system, and the power supply system is connected with the internal electric device of the weaving machine.

According to the power supply system and the loom, the first direct current transformation unit provides a bus with fixed voltage, and the bus and the second direct current transformation unit form a two-stage direct current voltage transformation to be supplied by an internal power device of the loom, so that the size of the whole power supply system is reduced, circuit interfaces are reduced, the cost is reduced, and the power supply system can adapt to power grids with different voltages without changing wires. The embodiment of the invention also ensures that the fault information can still be prompted under the fault condition by adding the backup power supply circuit.

Drawings

FIG. 1 is a schematic diagram of a power supply module in an integrated electrical control system of a conventional water jet loom;

fig. 2 is a schematic structural diagram of a power supply system according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a power supply system according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a power supply system according to a third embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power supply system according to a fourth embodiment of the invention;

fig. 6 is a schematic structural diagram of a power supply system according to a fifth embodiment of the invention;

fig. 7 is a schematic structural diagram of a power supply system according to a sixth embodiment of the invention;

fig. 8 is a schematic structural diagram of a power supply system according to a seventh embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 2 is a schematic diagram of a power supply system according to an embodiment of the present invention, which can be applied to a loom (e.g., a control device of a water jet loom) and supplies power to internal power consumption devices of the loom. The internal power utilization device of the loom includes a first device (for example, the first device may be a weft accumulator motor 41), the power supply system of this embodiment includes a rectifying unit 21, a first dc voltage transforming unit 31 and a second dc voltage transforming unit 32, and the power supply system is connected to an external ac power supply (for example, a three-phase ac power supply) through an ac side (specifically, a connection terminal, a reactor, a contactor, etc. may be included, and this part of circuit belongs to the conventional technology in the art and is not described herein again) of the rectifying unit 21.

The rectifying unit 21 converts an externally input alternating current into a direct current, and an output voltage V of the rectifying unit 21 is different according to an input voltage on an alternating current side of the rectifying unit 21_bus1With fluctuations, e.g. output voltage V of the rectifying unit 21_bus1300-. Specifically, the above-described rectifying unit 21 may be multiplexed with a rectifying circuit in the frequency converter.

An input terminal of the first dc voltage converting unit 31 is connected to a dc output terminal of the rectifying unit 21, and converts an output voltage V of the rectifying unit 21_bus1Is converted into a preset DC voltage V_bus2(e.g., 300V) and then output. Due to the output voltage V of the rectifying unit 21_bus1In order to make the output voltage V of the first DC voltage converting unit 31 have a wide voltage variation range_bus2The first DC voltage converting unit 31 adopts a non-isolated DC voltage converting circuit to stabilize the changed output voltage V of the rectifying unit 21_bus1Is converted into a preset DC voltage V with relatively low voltage and fixed_bus2Specifically, the first dc voltage converting unit 31 may implement dc voltage conversion through a high frequency switching converter, for example, the first dc voltage converting unit 31 may include a BUCK circuit (i.e., a step-down circuit) or the like.

The second dc transforming unit 32 includes a first voltage output end for connecting to the first device, and an input end of the second dc transforming unit 32 is connected to an output end of the first dc transforming unit 31, and outputs a preset dc voltage V output by the first dc transforming unit 31_bus2Is converted into a first voltage V₁(e.g. the 75V dc voltage required by the accumulator motor 41) is then output via a first voltage output (which may be constituted by a plug), thereby completing the supply of power to the first device. Due to the first timeThe preset DC voltage V output by the voltage conversion unit 31_bus2The second dc transforming unit 32 may be in an open-loop form, so as to simplify the control circuit.

Specifically, the second dc transforming unit 32 may include a primary switching circuit, a transformer, and a secondary rectifying circuit, and inputs the preset dc voltage V through the primary switching circuit_bus2Modulating the voltage into rectangular waves, realizing voltage amplitude conversion by adjusting the turn ratio of an original secondary coil of the transformer, and obtaining direct current through a secondary rectifying circuit.

The power supply system provides a bus with fixed voltage through the first direct current transformation unit 31, and forms a two-stage direct current voltage transformation with the second direct current transformation unit 32 to be converted into power supply for an internal power device of the loom, so that the size of the whole power supply system is reduced, circuit interfaces are reduced, and the cost is reduced. And the power grid with different voltages can be adapted without changing the line. In addition, the two-stage DC voltage conversion is beneficial to the expansion of the following load function.

In another embodiment of the present invention, as shown in fig. 3, the internal power utilization device of the loom includes a second device, which may be specifically a yarn gripper 43 and a steering valve 44, and accordingly, the second dc transforming unit 32 includes a second voltage output terminal for connecting the yarn gripper 43 and the steering valve 44 (i.e. the second dc transforming unit 32 includes two dc outputs, specifically, the second voltage output terminal may be formed by a plug), and the second dc transforming unit 32 transforms the preset dc voltage V output by the first dc transforming unit 31 into a preset dc voltage V_bus2Is converted into a second voltage V₂(e.g., 35V dc voltage required by the gripper 43 and the diverter valve 44) and then output through the second voltage output terminal, thereby completing the power supply of the second device.

Because the first device (such as the weft accumulator motor 41) and the second device (such as the yarn gripper 43 and the steering valve 44) are arranged at the same position of the loom, the first device and the second device can be respectively powered by two outputs of the second direct current transformation unit 32, so that the volume of a power supply system is further reduced. Of course, in practical application, the power supply system may also provide a separate dc voltage transformation unit for the yarn gripper 43 and the diverter valve 44, but this will certainly increase the volume and cost of the whole machine.

In a further embodiment of the invention, the internal power consuming device of the weaving machine comprises a third apparatus (which may for example be a fault-prompting device, which may in particular comprise a combination of one or more of the fan overheat warning unit 45, the main motor overheat warning unit 46 and the display screen 47). Accordingly, the second dc transforming unit 32 includes a third voltage output terminal (the third voltage output terminal may be formed by a plug) for connecting a third device, and the second dc transforming unit 32 may output the preset dc voltage V from the first dc transforming unit_bus2Converted into a third voltage V₃(e.g., 18V dc voltage required by the fault indication device), and then output via the third voltage output terminal, so as to supply power to the third device.

When the third device is a fault prompting device, the first device is a weft accumulator motor 41, and the second device is a yarn gripper 43 and a steering valve 44, because the mounting positions of the third device and the second device are close to each other in the loom, the third device can be powered by adding one path of output on the second direct current transformation unit 32, and the size of a power supply system is further reduced. Of course, in practical applications, the power supply system may also provide a separate dc voltage transforming unit for the third device, but this will certainly increase the volume and cost of the whole device.

In another embodiment of the present invention, as shown in fig. 4, the internal power utilization device of the loom further comprises a control circuit 42, and accordingly, the power supply system comprises a third dc transforming unit 33, and the third dc transforming unit comprises a fourth voltage output terminal (which may be formed by a plug) for connecting the control circuit 42. The input terminal of the third dc transforming unit 33 is connected to the dc output terminal of the rectifying unit 21, and the output voltage V of the rectifying unit 21 is obtained_bus1After converting to the fourth voltage V4 (for example, the 18V dc voltage required by the control circuit 42), the fourth voltage is outputted through the fourth voltage output terminal, so as to complete the power supply to the control circuit 42. The third dc transforming unit 33 may have a similar structure to the second dc transforming unit 32And will not be described herein.

In the loom, the difference between the power supply voltages of the control circuit 42 and the weft accumulator motor 41 is large, and the mounting positions of the control circuit and the weft accumulator motor are separated by a certain distance, so that the third direct current transformation unit 33 and the second direct current transformation unit 32 are used for supplying power to the weft accumulator motor and the weft accumulator motor respectively, interference can be reduced, and the phenomenon that the running distance of a cable in the loom is too long can be avoided.

In addition, as shown in fig. 5, in addition to directly taking power from the rectifying unit 21, the third dc transforming unit 33 may also take power from the output terminal of the first dc transforming unit 31, that is, the input terminal of the third dc transforming unit 33 is connected to the output terminal of the first dc transforming unit 31, and the preset dc voltage V output by the first dc transforming unit 31 is obtained by the third dc transforming unit 33_bus2After the voltage is converted into the fourth voltage V4, the fourth voltage is outputted through the fourth voltage output terminal.

As shown in fig. 6, the power supply system may further include a fourth dc transforming unit 34 and a first unidirectional conducting circuit, and an output terminal of the fourth dc transforming unit 34 is connected to a third device (especially, the display screen 47) through the first unidirectional conducting circuit, and provides a working voltage for the third device. The input end of the fourth dc transforming unit 34 is connected to the output end of the first dc transforming unit 31, and transforms the preset dc voltage outputted by the first dc transforming unit 31 into V_bus2After the fifth voltage V5 (voltage required by the failure indication device), the voltage is output through the first unidirectional conducting circuit. Specifically, the first unidirectional conducting circuit may be a diode.

The fifth voltage V5 output by the fourth dc transforming unit 34 may be slightly less than or equal to the third voltage V3 of the second dc transforming unit 32, so that the fourth dc transforming unit 34 does not output power when the second dc transforming unit 32 is operating normally. Once a fault such as a short circuit occurs in the multi-path output of the second dc transforming unit 32, which causes the whole second dc transforming unit 32 to stop outputting, and the power cannot be supplied to the display 47, the fourth dc transforming unit 34 can output the power supply voltage to the display 47, and notify the user of the fault information.

Referring to FIG. 7, the fourth DC transforming unit 34 is provided in addition toBesides taking power from the dc output terminal of the first dc voltage transforming unit 31, the fourth dc voltage transforming unit 34 can also take power from the dc output terminal of the rectifying unit 21, that is, the input terminal of the fourth dc voltage transforming unit 34 is connected to the dc output terminal of the rectifying unit 21, and the output voltage V of the rectifying unit 21 is obtained_bu1After converting to the fifth voltage V5, the voltage is outputted through the first unidirectional conducting circuit. The scheme can also supply power to the display screen 47 when the second direct current transformation unit 32 stops outputting, so that the fault prompting function is completed.

In addition, as shown in fig. 8, a dc output terminal may be directly added to the third dc transforming unit 33, that is, the third dc transforming unit 33 includes a second unidirectional conducting circuit and a fifth voltage output terminal, and the third dc transforming unit 33 is connected to the third device through the second unidirectional conducting circuit (e.g., a diode) and the fifth voltage output terminal, that is, the third dc transforming unit 33 further converts the output voltage of the rectifying unit 21 into a fifth voltage V5 and outputs the fifth voltage through the second unidirectional conducting circuit and the fifth voltage output terminal. The scheme can also supply power to the third device when the second direct current transformation unit 32 stops outputting, so that the fault prompting function is completed.

The embodiment of the invention also provides the weaving machine, which comprises the power supply system and is connected with the internal electric device of the weaving machine through the power supply system.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.