Driving circuit, jacquard driver and jacquard device

Abstract

The invention includes a driving circuit, a Jacquard driver, and a Jacquard weaving device. The driving circuit comprises a power supply VCC, a PWM signal source, control signals S1 and S2, AND gates U1 and U2, electronic switches K1 and K2, freewheeling diodes D1 and D2, an inductor L1, and an equivalent capacitor C1, which is the equivalent capacitance of the piezoelectric ceramic sheet. In this invention, during charging and discharging, electronic switches K1 and K2 maintain low losses throughout operation, resulting in significantly improved efficiency and effectively reduced heat generation in the driving circuit.

Description

Technical Field

[0001] This invention relates to the field of warp knitting machines, and in particular to drive circuits, jacquard drivers, and jacquard knitting devices. Background Technology

[0002] Analysis of the Current Status of Piezoelectric Ceramic Plate Drive Circuits: Currently, the drive circuits for piezoelectric ceramic plates in Jacquard devices (hereinafter referred to as "drive circuits") are essentially not significantly different, mainly differing in the number of components used; their working principles are largely the same. However, they all share a common drawback: the energy efficiency of these drive circuits is almost identical. This is determined by their working principles. If the same principle is used, the only difference lies in changing the circuit configuration and the number of components; it cannot fundamentally improve the energy efficiency ratio or reduce the energy consumed by the drive circuit during operation. During circuit operation, a considerable portion of the consumed electrical energy is lost as heat due to the circuit's equivalent resistance. Similarly, current drive circuits, because the piezoelectric ceramic plate is a capacitive load, inevitably suffer from energy loss, which also manifests as circuit heating. Previously, such heat generation did not have a significant impact because the drive circuit was separate and connected to the jacquard via a connecting wire. The location of the drive circuit determined that the heat dissipated by the drive circuit would not affect the normal operation of the jacquard, so the energy efficiency of the drive circuit was not a major concern.

[0003] With the increasing competition and development of warp knitting technology in China, some innovations have emerged in jacquard knitting, among which the wireless jacquard is quite representative. The so-called wireless jacquard is a new type of jacquard that integrates the drive circuitry into the jacquard itself. Because it integrates the drive circuitry and signal processing circuitry, the connection of the jacquard itself no longer requires the previous connecting wires, hence the name wireless jacquard. However, while this type of jacquard expands the application range of jacquard, the integrated drive circuitry brings with it a new challenge: the issue of driver overheating, which was previously not a concern. The main problems are as follows:

[0004] 1.1: The application environment of this type of Jacquard is semi-enclosed. If the power consumption of the drive circuit is high and the heat cannot be dissipated in time, the Jacquard temperature will rise significantly, affecting its service life.

[0005] 1.2: The heat emitted by Jacquard can affect machinery. Because the metal material expands and changes in size when heated, the machinery cannot operate in the optimal environment, and the mechanical failure rate increases. Summary of the Invention

[0006] This invention provides a drive circuit, a Jacquard driver, and a Jacquard device. Its main purpose is to overcome the defect that the drive circuit used in the Jacquard device generates a lot of heat, which affects the service life of the Jacquard device.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A driving circuit includes at least one power supply VCC1, at least one PWM signal source 1, at least one control signal S1, at least one control signal S2, at least one AND gate U1, at least one AND gate U2, at least one electronic switch K1, at least one electronic switch K2, at least one freewheeling diode D1, at least one freewheeling diode D2, at least one inductor L1, and at least one equivalent capacitance C1 of a piezoelectric ceramic sheet. The PWM signal source 1 is electrically connected to the input terminals of AND gate U1 and AND gate U2, respectively. The control signal S1 is electrically connected to the input terminal of AND gate U1, and the control signal S2 is electrically connected to the input terminal of AND gate U2. The power supply VCC1... C1 is electrically connected to one end of the electronic switch K1 and the cathode of the freewheeling diode D1. The output of the AND gate U1 is electrically connected to the electronic switch K1, and the output of the AND gate U2 is electrically connected to the electronic switch K2. The other end of the electronic switch K1, one end of the electronic switch K2, the anode of the freewheeling diode D1, and the cathode of the freewheeling diode D2 are all electrically connected to one end of the inductor L1. The other end of the capacitor L1 is electrically connected to one end of the equivalent capacitor C1. The other end of the electronic switch K2 and the anode of the freewheeling diode D2 are both electrically connected to the other end of the equivalent capacitor C1 and are grounded.

[0009] A Jacquard driver includes at least one printed circuit board and a driving circuit disposed on the printed circuit board, wherein the driving circuit is the driving circuit described above.

[0010] A Jacquard jacquard device includes at least one base, a plurality of piezoelectric Jacquard elements arranged on the base, and a Jacquard driver. The Jacquard driver is used to drive the piezoelectric Jacquard elements to perform jacquard yarn guiding action. A portion of the Jacquard driver is detachably mounted on a portion of the base. The Jacquard driver is the Jacquard driver described above.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] This invention features a simple structure and strong practicality. By incorporating AND gates U1 and U2, electronic switches K1 and K2, freewheeling diodes D1 and D2, and inductor L1, during charging, due to the presence of inductor L1, electronic switch K1 has current but no voltage when conducting and voltage but no current when cut off. Under the control of the PWM signal source, it operates in a switching state, thus the average loss of electronic switch K1 is relatively small. During discharging, due to the presence of inductor L1, electronic switch K2 has current but no voltage when conducting and voltage but no current when cut off. Under the control of the PWM signal source, it operates in a switching state, thus the average loss of electronic switch K2 is relatively small. This achieves energy saving on one hand and effectively reduces the heat generation of the drive circuit on the other, thereby improving the stability of circuit operation and extending its service life, achieving a dual benefit.

[0013] In this invention, during the charging and discharging process, electronic switches K1 and K2 are always operating at low losses, resulting in a significant improvement in efficiency and effectively reducing the heat generation of the drive circuit. Attached Figure Description

[0014] Figure 1 This is the circuit diagram of the present invention.

[0015] Figure 2 The diagram shows the circuit schematic, where the arrows indicate the path through which the charging current of the equivalent capacitor C1 flows when electronic switch K1 is turned on and electronic switch K2 is turned off.

[0016] Figure 3 The circuit diagram shows the path by which the current from inductor L1 charges the equivalent capacitance C1 when electronic switch K1 and electronic switch K2 are both turned off.

[0017] Figure 4 The circuit diagram shows the path through which the equivalent capacitor C1 discharges to the inductor L1 and the electronic switch K2 when electronic switch K1 is turned off and electronic switch K2 is turned on.

[0018] Figure 5 The circuit diagram shows that when electronic switch K1 and electronic switch K2 are both turned off, the current in inductor L1 returns to the power supply path.

[0019] Figure 6 This is a block diagram of the driving circuit.

[0020] Figure 7 An exploded view of a jacquard device.

[0021] Figure 8 This is a schematic diagram of the Jacquard actuator.

[0022] Figure 9 This is a schematic diagram of the Jacquard device.

[0023] Figure 10 This is a schematic diagram of a Jacquard device.

[0024] Figure 11 This is a diagram showing the state of the Jacquard device as it is being disassembled from the combing bed.

[0025] Figure 12 This is the circuit diagram for Example 5. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] Example 1, refer to Figure 1 The system includes a driving circuit, a Jacquard driver, and a Jacquard weaving device. The driving circuit comprises at least one power supply VCC, at least one PWM signal source, at least one Jacquard control signal S1, at least one Jacquard control signal S2, at least one AND gate U1, at least one AND gate U2, at least one electronic switch K1, at least one electronic switch K2, at least one freewheeling diode D1, at least one freewheeling diode D2, at least one inductor L1, and at least one equivalent capacitor C1. The PWM signal source is electrically connected to the input terminals of AND gate U1 and AND gate U2, respectively. The Jacquard control signal S1 is electrically connected to the input terminal of AND gate U1, and the Jacquard control signal S2 is electrically connected to the input terminal of AND gate U2. The input terminals are electrically connected. The power supply VCC is electrically connected to one end of the electronic switch K1 and the cathode of the freewheeling diode D1. The output terminal of the AND gate U1 is electrically connected to the electronic switch K1, and the output terminal of the AND gate U2 is electrically connected to the electronic switch K2. The other end of the electronic switch K1, one end of the electronic switch K2, the anode of the freewheeling diode D1, and the cathode of the freewheeling diode D2 are all electrically connected to one end of the inductor L1. The other end of the capacitor L1 is electrically connected to one end of the equivalent capacitor C1. The other end of the electronic switch K2 and the anode of the freewheeling diode D2 are both electrically connected to the other end of the equivalent capacitor C1 and are grounded.

[0028] Reference Figure 6 and Figure 7The circuit works as follows: The piezoelectric ceramic element 500 in a Jacquard is a capacitive component, essentially consisting of two capacitors. When charged, the piezoelectric ceramic element 500 deforms under the piezoelectric effect, causing it to oscillate left and right. The following is the equivalent circuit of the piezoelectric ceramic element 500, with the middle part grounded. Charging or discharging these two capacitors causes the piezoelectric ceramic element 500 to oscillate. It's important to note that only one capacitor can be charged at a time; the other must be de-charged (voltage across the capacitor is 0). This is determined by the current working principle of the piezoelectric ceramic element 500. Therefore, the driving circuit is essentially a circuit that charges and discharges the equivalent capacitance of the piezoelectric ceramic element 500.

[0029] Reference Figure 6 There is a driving circuit on each of the left and right sides, and the two have the same structure. In order to facilitate the explanation of their working principle, only one driving circuit will be explained in the following.

[0030] Reference Figure 1 The area within the dashed box is the equivalent schematic diagram of the drive circuit, with explanations of each point as follows:

[0031] 1. The equivalent capacitance C1 is the equivalent capacitance of the 500 piezoelectric ceramic sheet (refer to...). Figure 6 and Figure 7 ).

[0032] 2. The power supply VCC is a Jacquard-driven DC voltage source.

[0033] 3. Electronic switches K1 and K2 are electronic switches with two states: on and off, which are controlled by the high / low level of the corresponding AND gate.

[0034] 4. Before the electronic switches, there are AND gates U1 and U2 (or other equivalent gates). Each AND gate has two inputs. One input is connected in parallel to a PWM signal source (square wave signal source), and the other is connected to Jacquard control signals S1 and S2. The output is used to control the on / off state of electronic switches K1 and K2. In this circuit, according to common convention, a high level (=1) output from the AND gate represents the switch being on, and a low level (=0) represents the switch being off.

[0035] 5. A PWM signal source is a square wave signal source that outputs a square wave signal with a certain frequency and duty cycle to support the operation of the entire circuit.

[0036] The following explains how this drive circuit works and achieves its energy-saving effect. As previously mentioned, the piezoelectric ceramic sheet 500 (refer to...) Figure 6 and Figure 7The driving process of the circuit is essentially the charging and discharging process of the equivalent capacitor C1. The following describes the working process of the circuit. For ease of explanation, we will first assume that the equivalent capacitor C1 is in a de-energized state.

[0037] Reference Figure 1 , Figure 2 and Figure 3 The charging process of the equivalent capacitor C1:

[0038] 1: Set the Jacquard control signal S1=1; Jacquard control signal S2=0. At this time, the output of AND gate U1 is the output waveform of the PWM signal source, and the signal input terminal of AND gate U2 is 0. According to the characteristics of AND gate, the output of AND gate U2 is constant at this time and is not affected by the PWM signal source.

[0039] 2: Electronic switch K1 is controlled by AND gate U1. AND gate U1 outputs a PWM signal source signal, and AND gate U1 controls electronic switch K1 to perform conduction and cutoff actions according to the high and low changes of the square wave of the PWM signal source.

[0040] 3: When electronic switch K1 is turned on, freewheeling diode D2 is reverse biased, electronic switch K2 is cut off, and power supply VCC is applied to inductor L1 and equivalent capacitance C1 through electronic switch K1. When electronic switch K1 is turned on, the voltage across inductor L1 equals power supply VCC, and electronic switch K1 itself does not bear the power supply voltage. As the time electronic switch K1 is turned on increases, the current in inductor L1 increases, and the voltage across inductor L1 decreases. When the voltage drop across inductor L1 is not significant, electronic switch K1 enters the cut-off state again under the control of the PWM signal source. Due to the characteristics of inductance, the current direction of inductor L1 remains unchanged, and it continues to charge the equivalent capacitance C1, and freewheeling diode D2 is turned on.

[0041] As electronic switch K1 is continuously turned on and off under the control of the PWM signal source, the voltage across the equivalent capacitor C1 will eventually reach the voltage of the power supply VCC, completing the charging action of the equivalent capacitor C1. During this process, due to the presence of inductor L1, electronic switch K1 has current but no voltage when it is turned on, and voltage but no current when it is turned off. Under the control of the PWM signal source, it operates in a switching state, so the average loss of electronic switch K1 itself is relatively small.

[0042] Reference Figure 1 , Figure 3 and Figure 4 Discharge process of equivalent capacitance C1:

[0043] 1. Set the control signals: Jacquard control signal S1=0, Jacquard control signal S2=1. According to the characteristics of AND gates, the Jacquard control signal S1 at the input terminal of AND gate U1 is 0, so the output of AND gate U1 is constant at this time. The input terminal of AND gate U2 is 1. According to the characteristics of AND gates, the output of AND gate U2 is the output waveform of the PWM signal source, and the control process is the same as described above.

[0044] 2: Since electronic switch K2 is controlled by AND gate U2, electronic switch K2 is currently operating in a switching state under the control of the PWM signal source. Due to the previous charging action of electronic switch K1, point A is the positive terminal of the equivalent capacitor C1 (one end of the equivalent capacitor C1 is point A). The position of point A is referenced... Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in the attached diagram (reference numeral A), when electronic switch K2 is turned on, the equivalent capacitance C1 discharges through inductor L1. During the discharge process, due to the characteristics of the inductor, when electronic switch K2 is turned on, the charging voltage of the equivalent capacitance C1 is borne by inductor L1, meaning the voltage across inductor L1 is equal to the charging voltage of the equivalent capacitance C1, while the voltage across electronic switch K2 is 0. As the time electronic switch K2 is turned on increases, the current in inductor L1 increases, and the voltage across inductor L1 decreases. When the voltage drop across inductor L1 is not significant, electronic switch K2 enters the cutoff state under the control of the PWM signal source. Due to the characteristics of the inductor, the current direction of inductor L1 remains unchanged, and the current will return to the power supply VCC through freewheeling diode D1. That is, under the combined action of the continuous switching of electronic switch K2, inductor L1, and freewheeling diode D1, the energy previously stored in the equivalent capacitance C1 will be returned to the power supply.

[0045] As electronic switch K2 is continuously turned on and off under the control of the PWM signal source, the voltage across the equivalent capacitor C1 will eventually drop to 0, completing the discharge action of the equivalent capacitor C1. During this process, due to the presence of inductor L1, electronic switch K2 has current but no voltage when it is turned on, and voltage but no current when it is turned off. Under the control of the PWM signal source, it operates in a switching state, so the average loss of electronic switch K2 itself is relatively small.

[0046] Throughout the entire operation, electronic switches K1 and K2 maintained low losses, resulting in significantly improved efficiency and effectively reduced heat generation in the drive circuit.

[0047] Electronic switch K1 can be a switching circuit composed of transistors and MOSFETs. Electronic switch K2 can be a switching circuit composed of transistors and MOSFETs.

[0048] Reference Figure 6 and Figure 7The circuit and charging / discharging working principle of the other half of the piezoelectric ceramic sheet 500 are exactly the same as those described above, so they will not be repeated here.

[0049] Example 2, refer to Figure 7 The difference between this second embodiment and the first embodiment is that the Jacquard device can be installed inside the warp knitting machine. The Jacquard device includes a base 111, a plurality of piezoelectric Jacquard elements 102 arranged on the base 111, and a Jacquard driver 112. The Jacquard driver 112 is used to drive the piezoelectric Jacquard elements 102 to realize the jacquard yarn guiding action.

[0050] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The Jacquard driver 112 includes at least one printed circuit board 113, at least one first power port 114, at least one second power port 115, a first ribbon cable 116 disposed within the printed circuit board 113, at least one third power port 120 disposed at the tail of the printed circuit board 113, at least one plug-in element 300, at least one drive circuit 118 controlled by an external controller, a second ribbon cable 117 disposed within the printed circuit board 113, and a third ribbon cable 119 disposed within the printed circuit board 113. The drive circuit 118 is disposed on the printed circuit board 113.

[0051] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The first power port 114 is soldered to the left side of the printed circuit board 113, the second power port 115 is soldered to the right side of the printed circuit board 113, the plug-in element 300 is soldered to the front of the printed circuit board 113, and the third power port 120 is soldered to the rear of the printed circuit board 113. The first power port 114, the second power port 115, the plug-in element 300, the third power port 120, and the printed circuit board 113 are electrically connected together by soldering to form an inseparable whole 600.

[0052] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The first ribbon cable 116 includes a circuit that provides the required driving power to the driving circuit 118 and a process signal line. The first ribbon cable 116 is used to connect the first power connection port 114 and the second power connection port 115.

[0053] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10The output terminal of the first power connection port 114 and the input terminal of the second power connection port 115 are respectively soldered onto the printed circuit board 113, so that the first power connection port 114, the second power connection port 115 and the printed circuit board 113 are electrically connected together to form an inseparable whole. A part of the printed circuit board 113 is detachably mounted on a part of the base 111, and the piezoelectric Jacquard element is detachably mounted on another part of the base 111. In this embodiment, the piezoelectric Jacquard element can be located on the front of the base 111, and the printed circuit board 113 can be detachably mounted on the rear of the base 111. The base 111 is made of aluminum-magnesium alloy, aluminum alloy or magnesium alloy.

[0054] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 By setting the output end of the first power connection port 114 and the input end of the second power connection port 115, which are respectively soldered onto the printed circuit board 113, the first power connection port 114, the second power connection port 115 and the printed circuit board 113 are electrically connected together to form an inseparable whole. This whole serves as a power-gathering unit and performs the function of wireless power supply. On the one hand, it replaces the existing copper strip and pin power supply method, improving the integration of the power-gathering unit and the stability of power supply. On the other hand, by setting it up, a part of the printed circuit board 113 can be detachably mounted on a part of the base 111, which facilitates the separation and replacement of the Jacquard driver 112 during later maintenance. When the piezoelectric Jacquard element is damaged, the detached and usable Jacquard driver 112 can be transferred and installed on other bases 111 for reuse, thereby reducing product costs and achieving two benefits at once.

[0055] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The second ribbon cable 117 is used to connect the first power connection port 114 and the drive circuit 118. The second ribbon cable 117 includes a circuit that provides the required drive power to the drive circuit 118 and a process signal line.

[0056] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The third cable 119 is used to connect the third power port 120 and the drive circuit 118. The third cable 119 includes a circuit that provides the required drive power to the drive circuit 118 and a process signal line. When the needle pitch is adjusted, the third power port 120 is powered on. When the warp knitting machine is running normally, that is, when the jacquard device is normally jacquard guiding the yarn, the third power port 120 is not powered on.

[0057] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 By setting a third power port 120 and a third ribbon cable 119 located in the printed circuit board 113, when the stitch length needs to be adjusted before the warp knitting machine runs, a single jacquard device can be started as needed. An external cable connected separately to an external controller is used. This external cable is plugged into the third power port 120 in a pluggable manner to power on the device, thereby driving the single jacquard device that needs to be adjusted independently. After the adjustment is completed, the external cable can be unplugged to end the adjustment. This allows for quick and convenient adjustment of the stitch length of a specified single jacquard device.

[0058] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The printed circuit board 113 includes a first printed circuit board body 321 and a second printed circuit board body 322. The output terminal of the first printed circuit board body 321 and the input terminal of the second printed circuit board body 322 are electrically connected together by soldering to form an inseparable whole.

[0059] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The output terminal of the first power connection port 114, the input terminal of the second power connection port 115, and the output terminal of the third power connection port are all soldered onto the first printed circuit board body 321 and electrically connected together to form an inseparable whole. The output terminal of the second printed circuit board body 322 and the output terminal of the plug-in element 300 are soldered together to form an inseparable whole.

[0060] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10The actuator has multiple piezoelectric Jacquard elements arranged on the base 111. Each piezoelectric Jacquard element 102 includes at least one Jacquard pin 130, at least one substrate 502, two piezoelectric ceramic sheets 500 respectively wrapped around the left and right sides of the substrate 502, and two copper foil terminals 501 respectively disposed on the left and right sides of the substrate 502. The two copper foil terminals 501 are electrically connected to the tail of the corresponding piezoelectric ceramic sheet 500. The front of the substrate 502 is connected to the Jacquard pin 130. The voltage output by the drive circuit 118 is applied to the piezoelectric ceramic sheet 500 to drive the piezoelectric element. The ceramic sheet 500 oscillates, and the substrate 502 is an insulating layer, specifically a glass fiber sheet. The front end of the piezoelectric ceramic sheet 500 is provided with Jacquard needles 130. The substrate 502 and the two piezoelectric ceramic sheets 500 are combined to form a piezoelectric needle selection plate. Typically, 16 Jacquard needles 130 can be set on a base 111, arranged horizontally. The specific number of Jacquard needles 130 is determined according to the machine number of the warp knitting machine. The piezoelectric ceramic sheet 500 is energized by the Jacquard driver 112 to perform polarization treatment, so that they become opposite poles, causing the two piezoelectric ceramic sheets 500 to actively bend in the same direction at the same time.

[0061] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 When in use, the base 111 of one jacquard device (jacquard device 104) is close to the base 111 of another jacquard device (jacquard device 103), and the second power port 115 of one jacquard device (jacquard device 104) is close to the first power port 114 of another jacquard device (jacquard device 103). This allows the second power port 115 of one jacquard device (jacquard device 104) and the first power port 114 of another jacquard device (jacquard device 103) to be detachably installed together by plugging in, thereby quickly achieving electrical connection. This has the advantage of convenient installation, meets the needs of rapid installation, and achieves two benefits at once.

[0062] Although, Figure 11 The diagram only shows four Jacquard devices, but in actual use, it should not be limited to installing four Jacquard devices at the same time. This Jacquard device is used on warp knitting machines, and multiple Jacquard devices need to be installed in the warp knitting machine. The specific number depends on the machine number of the warp knitting machine.

[0063] Reference Figure 7 , Figure 8 and Figure 9The first power connection port 114 is either a male or female power connection port, and the second power connection port 115 is either a female or male power connection port. When the first power connection port 114 is a male power connection port, the second power connection port 115 is a female power connection port, and when the first power connection port 114 is a female power connection port, the second power connection port 115 is a male power connection port.

[0064] Reference Figure 8 , Figure 9 and Figure 11 When disassembly is required, the Jacquard device to be disassembled can be directly removed from the combing machine 101. Power is cut off the moment the Jacquard device is removed. The power-off process is explained below:

[0065] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The second power port 115 of one jacquard device (jacquard device 104) and the first power port 114 of another jacquard device (jacquard device 103) can also be electrically connected by plugging, magnetic attraction or pressing.

[0066] The electrical connection between the male and female electrical connectors can be achieved through pressure spring contact, pin contact, or ball contact.

[0067] When the male connector is a conductive pressure spring, the female connector is a conductive plug slot, and the electrical connection is achieved through pressure spring contact.

[0068] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 During installation, the base 111 of one jacquard device (jacquard device 104) is close to the base 111 of another jacquard device (jacquard device 103), and the second power port 115 of one jacquard device (jacquard device 104) is close to the first power port 114 of another jacquard device (jacquard device 103). Because the pressure spring of the male power port is elastic, it can be directly inserted into the insertion slot of the female power port in a plug-in manner, so that the pressure spring directly abuts in the insertion slot to achieve electrical connection. Then, the base 111 is locked to the combing bed 101 using the tail clip 122.

[0069] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 When disassembling, after loosening the locking screw on the tail clip 122, the Jacquard device (Jacquard device 104) can be directly removed from the combing machine 101. Because the pressure spring of the male connector is elastic, the pressure spring can be separated from the insertion slot by pulling it out during the removal of the Jacquard device, thereby achieving power disconnection.

[0070] When the male connector has a conductive pin, the female connector has a conductive groove, and the pin can be a conductive spring pin. The electrical connection is achieved through a pin-type contact.

[0071] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 During installation, the base 111 of one jacquard device (jacquard device 104) is close to the base 111 of another jacquard device (jacquard device 103), and the second power port 115 of one jacquard device (jacquard device 104) is close to the first power port 114 of another jacquard device (jacquard device 103). Because the pin of the male power port can be directly inserted into the pin groove of the female power port in a plug-in manner, an electrical connection is achieved. Then, the base 111 is locked to the combing bed 101 using the tail clip 122.

[0072] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 When disassembling, loosening the locking screw on the tail clip 122 allows the ejector pin to be pulled out of the needle groove during the removal of the jacquard device, thus separating the ejector pin from the needle groove and disconnecting the power.

[0073] When the male connector has a conductive round ball, the female connector has a conductive ball groove, and the electrical connection is achieved through a round ball contact.

[0074] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11During installation, the base 111 of one jacquard device (jacquard device 104) is close to the base 111 of another jacquard device (jacquard device 103), and the second power port 115 of one jacquard device (jacquard device 104) is close to the first power port 114 of another jacquard device (jacquard device 103). Because the male power port is a round ball, it can be directly inserted into the ball groove of the female power port by plugging, so that the round ball directly abuts in the ball groove to achieve electrical connection. Then, the base 111 is locked to the combing bed 101 using the tail clip 122.

[0075] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 When disassembling, after loosening the locking screw on the tail clip 122, the Jacquard device (Jacquard device 104) can be directly removed from the combing machine 101. During the removal of the Jacquard device, the round ball at the male power connector will roll out of the ball groove by pulling it out, thereby separating the round ball from the ball groove and cutting off the power.

[0076] When the male connector is a conductive magnetic connector, the female connector is a conductive magnetic connection slot, and the electrical connection is achieved through magnetic contact.

[0077] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 During installation, the base 111 of one jacquard device (jacquard device 104) is placed close to the base 111 of another jacquard device (jacquard device 103), and the second power port 115 of one jacquard device (jacquard device 104) is placed close to the first power port 114 of another jacquard device (jacquard device 103). Because the magnetic connector of the male power port is magnetic, it can be directly connected to the magnetic connection slot in a magnetic manner to achieve phase connection. Then, the base 111 is locked to the combing bed 101 using the tail clip 122.

[0078] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11When disassembling, after loosening the locking screw on the tail clip 122, the Jacquard device (Jacquard device 104) can be directly removed from the combing bed 101. In the process of removing the Jacquard device, the magnetic connector can be separated from the magnetic connection slot by pulling it out, thereby achieving power disconnection.

[0079] For specific details regarding the external controller in this embodiment, please refer to the references provided in the background section (Chinese Invention Patent Application No.: 201710030965.9, Publication No.: CN106757749B). The CPU described therein is an external controller in the prior art, and the references provide detailed descriptions and explanations, which will not be repeated here.

[0080] Reference Figure 7 , Figure 8 and Figure 9 A plurality of first mounting holes 202 are provided on the rear part of the base 111, and a plurality of second mounting holes 201 are provided on the printed circuit board 113. The first mounting holes 202 and the second mounting holes 201 are adapted to each other. After the screw 200 passes through the second mounting hole, it is locked in the first mounting hole 202, so that the printed circuit board 113 can be detachably mounted on the rear part of the base 111.

[0081] Reference Figure 7 When the stitch length needs to be adjusted before the warp knitting machine is running, a single jacquard device can be started as needed. Specifically, an external cable connected separately to the external controller is used. This external cable is plugged into the third power port 120 in a pluggable manner to provide power (input drive power and process signals), thereby driving the single jacquard device that needs to be adjusted. After the adjustment is completed, the external cable is simply unplugged to end the adjustment. This allows for quick and convenient adjustment of the stitch length of a specified single jacquard device.

[0082] The stitch length of a warp knitting machine typically refers to the left-right position of the guide bar relative to the knitting needles. The left-right distance of the entire row of guide needles relative to the knitting needles is controlled by the slider top wire of the pattern wheel. Using the knitting needles as a reference, observe the left-right position of the guide bar and adjust the direction of the top wire to move the guide bar slightly laterally, to the middle of the knitting needles. The stitch length needs to be adjusted before the warp knitting machine can operate normally.

[0083] Reference Figure 7 , Figure 8 , Figure 9When the warp knitting machine is being tested before use, the third power port 120 is powered on, while the first power port 114 and the second power port 115 are not powered on. The third power port 120 is powered on only when the stitch length is being tested by connecting an external cable. The tail clip 122 has a wire groove 121, through which the external cable can be inserted to connect to the third power interface. When the warp knitting machine is working normally, the third power port 120 is idle, with no external cable installed and no power connected.

[0084] Reference Figure 7 , Figure 8 , Figure 9 and Figure 11 When the warp knitting machine is running normally, the first power port 114, the drive circuit 118, the second power port 115, and the plug-in element 300 are all powered (input drive power and process signals), while the third power port 120 is not powered.

[0085] Other structures are similar to those in Embodiment 1, and will not be described in detail here.

[0086] Example 3, refer to Figure 7 and Figure 8 The difference between this third embodiment and the first embodiment is that the rear part of the plug-in element 300 and the front part of the printed circuit board 113 are connected together by soldering, so that the input end of the plug-in element 300 is electrically connected to the output end of the drive circuit 118, and the output end of the plug-in element 300 is detachably mounted on the enable end of the piezoelectric Jacquard element 102 in a plug-in manner.

[0087] Reference Figure 7 In this embodiment, the specific power connection terminal of the piezoelectric Jacquard element 102 is the copper foil power connection terminal 501 on the tail of the piezoelectric ceramic sheet 500. A copper foil power connection terminal 501 is provided on each of the left and right sides of the glass fiber sheet 502. One copper foil power connection terminal 501 is the positive electrode and the other copper foil power connection terminal 501 is the negative electrode.

[0088] Reference Figure 7 The plug-in element 300 includes a fourth housing 301, a plurality of slots 302 disposed in the fourth housing 301, a plurality of pads 303 disposed in the slots 302, and a plurality of conductive fourth anti-oxidation layers 304.

[0089] Reference Figure 7Each pad 303 has a fourth antioxidant layer 304. A slot 302 extends from the front of the fourth housing 301, through the interior of the fourth housing 301, and finally to the rear of the fourth housing 301. The rear end of the fourth antioxidant layer 304 is located on the rear of the fourth housing 301, and the front end of the fourth antioxidant layer 304 extends into the slot 302. Specifically, two fourth antioxidant layers 304 are provided in one slot 302; one fourth antioxidant layer 304 serves as the positive electrode, and the other fourth antioxidant layer 304 serves as the negative electrode.

[0090] Reference Figure 7 and Figure 7 The fourth housing 301 is detachably mounted on the electrical terminal of the piezoelectric Jacquard element 102 via a plug-in connection, so that the copper foil electrical terminal 501 is electrically connected to the corresponding fourth anti-oxidation layer 304. The rear end of the fourth anti-oxidation layer 304 is electrically connected to the drive circuit 118 through the printed circuit board 113, so that the copper foil electrical terminal 501 is electrically connected to the printed circuit board 113, thereby causing the drive circuit 118 to drive the Jacquard needle 130 of the piezoelectric Jacquard element 102 to swing.

[0091] Other structures are similar to those in Embodiment 2, and will not be described in detail here.

[0092] Example 4, refer to Figure 7 and Figure 8 The difference between this embodiment four and embodiment two is that the first power connection port 114 includes at least one first housing 131 disposed on the left side of the printed circuit board 113 and a plurality of conductive first anti-oxidation power connection terminals 132. The output end of the first anti-oxidation power connection terminal 132 is soldered to the left side of the printed circuit board 113, so that the first housing 131 is fixedly installed on the left side of the printed circuit board 113.

[0093] Reference Figure 9 and Figure 10 The output terminal of the first anti-oxidation electrical terminal 132 is electrically connected to the first ribbon cable 116 and the second ribbon cable 117 respectively, and the electrical terminal of the first anti-oxidation electrical terminal 132 extends toward the left side of the first housing 131.

[0094] Reference Figure 8 The second power connection port 115 includes at least one second housing 141 disposed on the right side of the printed circuit board 113 and a plurality of conductive second anti-oxidation power terminals 142. The output end of the second anti-oxidation power terminals 142 is soldered to the right side of the printed circuit board 113, so that the second housing 141 is fixedly mounted on the right side of the printed circuit board 113.

[0095] Reference Figure 8 and Figure 10The input terminal of the second anti-oxidation electrical terminal 142 is electrically connected to the first ribbon cable 116, and the electrical terminal of the second anti-oxidation electrical terminal 142 extends toward the right side of the second housing 141.

[0096] Reference Figure 8 Figure 9 and Figure 11 When the second power port 115 of one jacquard device (jacquard device 104) and the first power port 114 of another jacquard device (jacquard device 103) are detachably installed together by plugging, the first anti-oxidation power terminal 132 and the second anti-oxidation power terminal 142 are electrically connected.

[0097] Reference Figure 9 The first anti-oxidation terminal 132 includes at least one conductive copper core layer and at least one first gold plating layer, wherein the first gold plating layer is plated on the first copper core layer.

[0098] Reference Figure 9 By setting a first gold plating layer, the first gold plating layer can protect the first copper core layer and play an anti-oxidation role, thereby extending the service life of the first anti-oxidation terminal 132 and enabling the first anti-oxidation terminal 132 to maintain good conductivity during long-term use.

[0099] Reference Figure 8 The second anti-oxidation terminal 142 includes at least one conductive second copper core layer and at least one second gold plating layer, wherein the second gold plating layer is plated on the second copper core layer.

[0100] Reference Figure 8 By setting a second gold plating layer, the second gold plating layer can protect the second copper core layer and play an anti-oxidation role, thereby extending the service life of the second anti-oxidation terminal 142 and enabling the second anti-oxidation terminal 142 to maintain good conductivity during long-term use.

[0101] The copper core layer can also be replaced with a conductive copper sheet layer.

[0102] Other structures are similar to those in Embodiment 2, and will not be described in detail here.

[0103] Example 4, refer to Figure 7 , Figure 8 and Figure 9The difference between this fourth embodiment and the second embodiment is that the third power connection port 120 includes at least one third housing 151 disposed on the tail of the printed circuit board 113 and a plurality of conductive third anti-oxidation power connection terminals. The output end of the third anti-oxidation power connection terminal is soldered to the tail of the printed circuit board 113, so that the third housing 151 is fixedly installed on the tail of the printed circuit board 113. The input end of the third anti-oxidation power connection terminal is disposed inside the third housing 151, and the output end of the third anti-oxidation power connection terminal is electrically connected to the third ribbon cable 119.

[0104] The third anti-oxidation terminal includes at least one conductive third copper core layer and at least one third gold plating layer, wherein the third gold plating layer is plated on the third copper core layer. The copper core layer may also be replaced with a conductive copper sheet layer.

[0105] By setting a third gold plating layer, the third gold plating layer can protect the third copper core layer and resist oxidation, thereby extending the service life of the third anti-oxidation terminal and ensuring that the third anti-oxidation terminal maintains good conductivity during long-term use.

[0106] Other structures are similar to those in Embodiment 2, and will not be described in detail here.

[0107] Example 5, refer to Figure 12A driving circuit includes at least one power supply VCC, at least one PWM signal source, at least one Jacquard control signal S1, at least one Jacquard control signal S2, at least one Jacquard control signal S3, at least one Jacquard control signal S4, at least one AND gate U1, at least one AND gate U2, at least one AND gate U3, at least one AND gate U4, at least one electronic switch K1, at least one electronic switch K2, at least one electronic switch K3, at least one electronic switch K4, at least one freewheeling diode D1, at least one freewheeling diode D2, at least one freewheeling diode D3, at least one freewheeling diode D4, at least one inductor L1, and so on. The system includes at least one inductor L2, at least one equivalent capacitor C1, and at least one equivalent capacitor C2. Equivalent capacitor C1 is the equivalent capacitance of one piezoelectric ceramic element, and equivalent capacitor C2 is the equivalent capacitance of another piezoelectric ceramic element. A PWM signal source is electrically connected to the inputs of AND gate U1 and AND gate U2, respectively. A Jacquard control signal S1 is electrically connected to the input of AND gate U1, and a Jacquard control signal S2 is electrically connected to the input of AND gate U2. The power supply VCC is electrically connected to one end of electronic switch K1 and the cathode of freewheeling diode D1, respectively. The output of AND gate U1 is electrically connected to electronic switch K1, and the output of AND gate U2 is electrically connected to... Electronic switch K2 is electrically connected. The other end of electronic switch K1, one end of electronic switch K2, the anode of freewheeling diode D1, and the cathode of freewheeling diode D2 are all electrically connected to one end of inductor L1. The other end of capacitor L1 is electrically connected to one end of equivalent capacitance C1. The other end of electronic switch K2 and the anode of freewheeling diode D2 are both electrically connected to the other end of equivalent capacitance C1 and grounded. The PWM signal source is electrically connected to the inputs of AND gate U3 and AND gate U4, respectively. Jacquard control signal S3 is electrically connected to the input of AND gate U3, and Jacquard control signal S4 is electrically connected to the AND gate. The input terminal of AND gate U4 is electrically connected to the electronic switch K3, and one end of the electronic switch K3 is electrically connected to the cathode of the freewheeling diode D3. The output terminal of AND gate U3 is electrically connected to the electronic switch K3, and the output terminal of AND gate U4 is electrically connected to the electronic switch K4. The other end of electronic switch K3, one end of electronic switch K4, the anode of freewheeling diode D3, and the cathode of freewheeling diode D4 are all electrically connected to one end of inductor L2. The other end of capacitor L2 is electrically connected to one end of equivalent capacitor C2. The other end of electronic switch K4 and the anode of freewheeling diode D4 are both electrically connected to the other end of equivalent capacitor C2 and are grounded.

[0108] During the charging and discharging process, electronic switches K1, K2, K3 and K4 maintain low losses, resulting in significantly improved efficiency and effectively reducing the heat generation of the drive circuit.

[0109] Reference Figure 12 The charging process of the equivalent capacitor C2:

[0110] 1: Set the control signal Jacquard control signal S3=1; Jacquard control signal S2=0. At this time, the output of AND gate U3 is the output waveform of the PWM signal source, and the signal input terminal of AND gate U4 is 0. According to the characteristics of AND gate, the output of AND gate U4 is constant at this time and is not affected by the PWM signal source.

[0111] 2: Electronic switch K3 is controlled by AND gate U3. AND gate U3 outputs a PWM signal source signal, and AND gate U3 controls electronic switch K3 to perform conduction and cut-off actions according to the high and low changes of the square wave of the PWM signal source.

[0112] 3: When electronic switch K3 is turned on, freewheeling diode D4 is reverse biased, electronic switch K4 is cut off, and power supply VCC is applied to inductor L2 and equivalent capacitance C2 through electronic switch K3. When electronic switch K3 is turned on, the voltage across inductor L2 equals power supply VCC, and electronic switch K3 itself does not bear the power supply voltage. As the time electronic switch K3 is turned on increases, the current in inductor L2 increases, and the voltage across inductor L2 decreases. When the voltage drop across inductor L2 is not significant, electronic switch K3 enters the cut-off state again under the control of the PWM signal source. Due to the characteristics of inductance, the current direction of inductor L2 remains unchanged, and it continues to charge the equivalent capacitance C2, and freewheeling diode D4 is turned on.

[0113] As electronic switch K3 is continuously turned on and off under the control of the PWM signal source, the voltage across the equivalent capacitor C2 will eventually reach the voltage of the power supply VCC, completing the charging action of the equivalent capacitor C2. During this process, due to the presence of inductor L2, electronic switch K3 has current but no voltage when it is turned on, and voltage but no current when it is turned off. Under the control of the PWM signal source, it operates in a switching state, so the average loss of electronic switch K3 itself is relatively small.

[0114] Reference Figure 12 Discharge process of equivalent capacitance C2:

[0115] 1. Set the control signals: Jacquard control signal S3=0, Jacquard control signal S2=1. According to the characteristics of AND gates, the Jacquard control signal S3 at the input terminal of AND gate U3 is 0, so the output of AND gate U3 is constant at this time. The input terminal of AND gate U4 is 1. According to the characteristics of AND gates, the output of AND gate U4 is the output waveform of the PWM signal source, and the control process is the same as described above.

[0116] 2: Since electronic switch K4 is controlled by AND gate U4, it operates in a switching state under the control of the PWM signal source. Due to the charging action of electronic switch K3, when electronic switch K4 is turned on, the equivalent capacitor C2 will discharge through inductor L2. During the discharge process, due to the characteristics of the inductor, when electronic switch K4 is turned on, the charging voltage of the equivalent capacitor C2 will be borne by inductor L2, that is, the voltage across inductor L2 is equal to the charging voltage of the equivalent capacitor C2, while the voltage across electronic switch K4 is 0. As the conduction time of electronic switch K4 increases, the current in inductor L2 increases, and the voltage at the terminal of inductor L2 decreases. When the voltage drop at the terminal of inductor L2 is not significant, electronic switch K4 enters the cut-off state again under the control of the PWM signal source. Due to the characteristics of inductance, the current direction of inductor L2 remains unchanged, and the current will return to the power supply VCC through the freewheeling diode D3. That is, under the combined action of the continuous switching of electronic switch K4, inductor L2, and freewheeling diode D3, the energy previously stored in the equivalent capacitor C2 will be returned to the power supply.

[0117] As electronic switch K4 is continuously turned on and off under the control of the PWM signal source, the voltage across the equivalent capacitor C2 will eventually drop to 0, completing the discharge action of the equivalent capacitor C2. During this process, due to the presence of inductor L2, electronic switch K4 has current but no voltage when it is turned on, and voltage but no current when it is turned off. Under the control of the PWM signal source, it operates in a switching state, so the average loss of electronic switch K4 itself is relatively small.

[0118] Throughout the entire operation, electronic switches K3 and K4 maintained low power consumption, resulting in significantly improved efficiency and effectively reduced heat generation in the drive circuit.

[0119] Reference Figure 1 , Figure 7 and Figure 12 The circuit and charging / discharging working principle of the other half of the piezoelectric ceramic sheet 500 are exactly the same as those in Example 1, so they will not be described again.

[0120] Electronic switch K3 can be a switching circuit composed of transistors and MOSFETs. Electronic switch K4 can be a switching circuit composed of transistors and MOSFETs.

[0121] Other structures are similar to those in Embodiment 1, and will not be described in detail here.

[0122] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A Jacquard actuator, characterized in that: The Jacquard driver includes at least one printed circuit board, at least one first power port, at least one second power port, a first ribbon cable disposed within the printed circuit board, at least one third power port disposed at the rear of the printed circuit board, at least one connector, at least one drive circuit controlled by an external controller, a second ribbon cable disposed within the printed circuit board, and a third ribbon cable disposed within the printed circuit board. The drive circuit is disposed on the printed circuit board. By setting the output terminal of the first power connection port and the input terminal of the second power connection port, and soldering them onto the printed circuit board, the first power connection port, the second power connection port, and the printed circuit board are electrically connected together to form an inseparable whole. The second ribbon cable is used to connect the first power connection port and the drive circuit. The second ribbon cable includes circuitry that provides the required drive power to the drive circuit and process signal lines. The third row of cables connects the third power port to the drive circuit. This third row includes circuitry that provides the necessary power to the drive circuit, as well as process signal lines. When adjusting the needle pitch, the third power port is energized. When the warp knitting machine is running normally, that is, when the jacquard device is guiding the yarn normally, the third power port is de-energized. When the stitch length needs to be adjusted before running the warp knitting machine, start the designated jacquard device as needed. Use an external cable that is separately connected to the external controller. Plug this external cable into the third power port to power on the device, thereby driving the designated jacquard device independently. After adjustment, simply unplug the external cable to end the adjustment process. The first power connector can be either a male or female connector, and the second power connector can be either a female or male connector. The driving circuit includes at least one power supply VCC1, at least one PWM signal source 1, at least one control signal S1, at least one control signal S2, at least one AND gate U1, at least one AND gate U2, at least one electronic switch K1, at least one electronic switch K2, at least one freewheeling diode D1, at least one freewheeling diode D2, at least one inductor L1, and at least one equivalent capacitor C1. The equivalent capacitor C1 is the equivalent capacitance of the piezoelectric ceramic sheet. When the equivalent capacitor C1 is in the charging process, by setting the inductor L1, the electronic switch K1 has current but no voltage when it is turned on, and voltage but no current when it is turned off. It operates in the switching state under the control of the PWM signal source 1. When the equivalent capacitor is in the discharging process, by setting the inductor L1, the electronic switch K2 has current but no voltage when it is turned on, and voltage but no current when it is turned off. It operates in the switching state under the control of the PWM signal source 1.

2. A jacquard drive as claimed in claim 1, wherein: The PWM signal source 1 is electrically connected to the input terminals of AND gate U1 and AND gate U2, respectively. The control signal S1 is electrically connected to the input terminal of AND gate U1, and the control signal S2 is electrically connected to the input terminal of AND gate U2. The power supply VCC1 is electrically connected to one end of the electronic switch K1 and the cathode of the freewheeling diode D1, respectively. The output terminal of AND gate U1 is electrically connected to the electronic switch K1, and the output terminal of AND gate U2 is electrically connected to the electronic switch K2. The other end of the electronic switch K1, one end of the electronic switch K2, the anode of the freewheeling diode D1, and the cathode of the freewheeling diode D2 are all electrically connected to one end of the inductor L1. The other end of the capacitor L1 is electrically connected to one end of the equivalent capacitor C1. The other end of the electronic switch K2 and the anode of the freewheeling diode D2 are both electrically connected to the other end of the equivalent capacitor C1 and are grounded.

3. The jacquard drive of claim 1, wherein: When the equivalent capacitor C1 is charging, the control signal S1 is set to 1 and the control signal S2 is set to 0. At this time, the output of AND gate U1 is the output waveform of PWM signal source 1, and the signal input terminal of AND gate U2 is 0. At this time, the output of AND gate U2 is constant at 0 and is not affected by PWM signal source 1. AND gate U1 controls the electronic switch K1 to turn on and off according to the high and low changes of the square wave of PWM signal source 1. When electronic switch K1 is on, the freewheeling diode D2 is reverse biased, electronic switch K2 is off, and the power supply VCC1 is applied to the inductor L1, the equivalent capacitor C1, and the terminals of inductor L1 through electronic switch K1. The voltage is equal to the power supply VCC1. The electronic switch K1 itself does not bear the power supply voltage. As the conduction time of the electronic switch K1 increases, the current of the inductor L1 increases, and the voltage at the end of the inductor L1 decreases. When the voltage drop at the end of the inductor L1 is not significant, the electronic switch K1 enters the cut-off state again under the control of the PWM signal source 1. The current direction of the inductor L1 remains unchanged and continues to charge the equivalent capacitor C1. The freewheeling diode D2 is turned on. As the electronic switch K1 is continuously turned on and off under the control of the PWM signal source 1, the voltage across the equivalent capacitor C1 will eventually reach the voltage of the power supply VCC1, completing the charging action of the equivalent capacitor C1.

4. The jacquard drive of claim 1, wherein: When the equivalent capacitance C1 is discharging, a control signal is set, with control signal S1=0 and control signal S2=1. The input terminal of AND gate U1 is set to 0, so the output of AND gate U1 is constant at 0. The input terminal of AND gate U2 is 1, and the output of AND gate U2 is the output waveform of PWM signal source 1. AND gate U2 outputs the signal from PWM signal source 1, controlling the electronic switch K2 to turn on and off according to the high and low levels of the square wave from PWM signal source 1. The electronic switch K2 is controlled by AND gate U2 and operates in a switching state under the control of PWM signal source 1. When electronic switch K2 is on, the equivalent capacitance C1 will discharge through inductor L1; the charging voltage of the equivalent capacitance C1 will be supplied by inductor L1. The circuit is subjected to a load such that the voltage across inductor L1 equals the charging voltage of the equivalent capacitor C1, and the voltage across electronic switch K2 is 0. As the conduction time of electronic switch K2 increases, the current in inductor L1 increases, and the voltage across inductor L1 decreases. When the voltage drop across inductor L1 is not significant, electronic switch K2 enters the cut-off state under the control of the PWM signal source 1. The current direction of inductor L1 remains unchanged, and the current will return to the power supply VCC1 through the freewheeling diode D1. Under the combined action of the continuous switching of electronic switch K2, inductor L1, and freewheeling diode D1, the energy previously stored in the equivalent capacitor C1 will be returned to the power supply VCC1. As electronic switch K2 is continuously turned on and off under the control of the PWM signal source 1, the voltage across the equivalent capacitor C1 will eventually drop to 0, completing the discharge action of the equivalent capacitor C1.

5. The jacquard drive of claim 1, wherein: The driving circuit is replaced with one including at least one power supply VCC1, at least one PWM signal source 1, at least one PWM signal source 2, at least one control signal S1, at least one control signal S2, at least one control signal S3, at least one control signal S4, at least one AND gate U1, at least one AND gate U2, at least one AND gate U3, at least one AND gate U4, at least one electronic switch K1, at least one electronic switch K2, at least one electronic switch K3, at least one electronic switch K4, at least one freewheeling diode D1, at least one freewheeling diode D2, at least one freewheeling diode D3, at least one freewheeling diode D4, at least one inductor L1, at least one inductor L2, at least one equivalent capacitor C1, and at least one equivalent capacitor C2. The equivalent capacitor C1 is the equivalent capacitance of one piezoelectric ceramic sheet, and the equivalent capacitor C2 is the equivalent capacitance of another piezoelectric ceramic sheet. When the equivalent capacitor C1 is charging, it... An inductor L1 is set so that electronic switch K1 has current but no voltage when it is on, and voltage but no current when it is off, operating in a switching state under the control of PWM signal source 1. When the equivalent capacitor is in the discharge process, the inductor L1 is set so that electronic switch K2 has current but no voltage when it is on, and voltage but no current when it is off, operating in a switching state under the control of PWM signal source 1. When the equivalent capacitor C2 is in the charging process, the inductor L2 is set so that electronic switch K3 has current but no voltage when it is on, and voltage but no current when it is off, operating in a switching state under the control of PWM signal source 2. When the equivalent capacitor is in the discharge process, the inductor L2 is set so that electronic switch K4 has current but no voltage when it is on, and voltage but no current when it is off, operating in a switching state under the control of PWM signal source 2.

6. A jacquard drive as claimed in claim 5, wherein: The PWM signal source 1 is electrically connected to the input terminals of AND gate U1 and AND gate U2, respectively. The control signal S1 is electrically connected to the input terminal of AND gate U1, and the control signal S2 is electrically connected to the input terminal of AND gate U2. The power supply VCC1 is electrically connected to one end of the electronic switch K1 and the cathode of the freewheeling diode D1, respectively. The output terminal of AND gate U1 is electrically connected to the electronic switch K1, and the output terminal of AND gate U2 is electrically connected to the electronic switch K2. The other end of the electronic switch K1, one end of the electronic switch K2, the anode of the freewheeling diode D1, and the cathode of the freewheeling diode D2 are all electrically connected to one end of the inductor L1. The other end of the capacitor L1 is electrically connected to one end of the equivalent capacitance C1. The other end of the electronic switch K2 and the anode of the freewheeling diode D2 are both electrically connected to the other end of the equivalent capacitance C1. The circuit is grounded. The PWM signal source 2 is electrically connected to the input terminals of AND gate U3 and AND gate U4, respectively. The control signal S3 is electrically connected to the input terminal of AND gate U3, and the control signal S4 is electrically connected to the input terminal of AND gate U4. One end of the electronic switch K3 is electrically connected to the cathode of the freewheeling diode D3. The output terminal of AND gate U3 is electrically connected to the electronic switch K3. The output terminal of AND gate U4 is electrically connected to the electronic switch K4. The other end of the electronic switch K3, one end of the electronic switch K4, the anode of the freewheeling diode D3, and the cathode of the freewheeling diode D4 are all electrically connected to one end of the inductor L2. The other end of the capacitor L2 is electrically connected to one end of the equivalent capacitor C2. The other end of the electronic switch K4 and the anode of the freewheeling diode D4 are both electrically connected to the other end of the equivalent capacitor C2 and are grounded.

7. The jacquard drive of claim 1, wherein: The Jacquard driver further includes at least one first power port, at least one second power port, and at least one connector. The first power port is soldered to the left side of the printed circuit board, the second power port is soldered to the right side of the printed circuit board, and the connector is soldered to the front of the printed circuit board. This allows the first power port, the second power port, the connector, and the printed circuit board to be electrically connected together by soldering, forming an inseparable whole.

8. A jacquard device, characterized in that: The Jacquard device includes at least one base, a plurality of piezoelectric Jacquard elements arranged on the base, and at least one Jacquard driver. The Jacquard driver is used to drive the piezoelectric Jacquard elements to perform jacquard yarn guiding action. A portion of the Jacquard driver is detachably mounted on a portion of the base. The Jacquard driver is the Jacquard driver of claim 1.

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