CN212115180U - Intelligent sewing machine power control system - Google Patents

Abstract

The utility model discloses an intelligent sewing machine power control system, it includes the AC input that connects gradually, EMI filtering unit, rectification filtering unit, transformer unit, 27V output rectifier unit, 5V output rectifier unit, PWM control unit, output voltage feedback loop, the 27V output of 27V output rectifier unit and the 5V output of 5V output rectifier unit all connect the output interface, and the AC input still is connected with the supplementary detection circuit of electric wire netting circuit, the supplementary detection circuit of electric wire netting circuit connects the output interface, the main control panel of sewing machine is connected to the output interface, the purpose of doing so is to improve sewing machine job stabilization nature, when sewing machine starts an instant, judge at first whether the voltage of electric wire netting has reached safe starting voltage, if the sewing machine just gets into the start mode, if not just continue waiting, the load of electric wire netting has effectively been reduced, the use is safer and more reliable.

Description

Intelligent sewing machine power control system

Technical field:

The utility model relates to the technical field of sewing machine power supply, in particular to an intelligent sewing machine power supply control system.

Background technique:

With the rise of labor costs and the upgrade of the Internet, artificial intelligence and the Internet of Things are new growth points for future economic development. The automated intelligent assembly line can achieve unmanned operation. Of course, the connection and coordination of each process link has been upgraded from traditional employee identification to self-identification and judgment between process equipment. Sewing machines in the industrial category are also constantly being upgraded, from a simple single operation to multiple collaborations, which will be upgraded from manual operations to intelligent unmanned management operations. Smart sewing machines have won the favor of entrepreneurs with their powerful functions. As long as electronic products need power to provide energy, smart sewing machines are no exception.

The safety of the machine is the basic requirement of the product. The design of the power control system of the intelligent sewing machine is especially critical. Because the power of the industrial sewing machine is relatively large, it will cause great disturbance to the power grid at the moment of startup, especially when multiple devices are working at the same time. considered and resolved in the study.

In recent years, countries around the world have paid more and more attention to environmental protection and energy conservation. The development of a high-efficiency and safe intelligent sewing machine power control system must be considered and studied by professional power supply manufacturers.

Therefore, the present inventors propose the following technical solutions.

Utility model content:

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an intelligent sewing machine power control system.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions: the intelligent sewing machine power control system includes an AC input terminal, an EMI filter unit, a rectifier filter unit, a transformer unit, a 27V output rectifier unit, and a 27V output rectifier unit connected in sequence. The 5V output rectifier unit connected to the 27V output end of the unit, the PWM control unit connected to the transformer unit, the output voltage feedback loop connected to the PWM control unit and the 27V output rectifier unit, the 27V output end of the 27V output rectifier unit and the 5V The 5V output end of the output rectifier unit is connected to the output interface, and the AC input end is also connected with an auxiliary detection circuit of the grid circuit, and the auxiliary detection circuit of the grid circuit is connected to the output interface, and the output interface is connected to the main control board of the sewing machine.

Further, in the above technical solution, the PWM control unit includes a PWM main control chip, the PWM main control chip is connected to the output voltage feedback loop through a first optocoupler, and the model of the PWM main control chip is TEA1733T.

Further, in the above-mentioned technical scheme, the output voltage feedback loop includes a sampling resistor R28 and a sampling resistor R27 connected with this 27V output rectifier unit and a reference voltage chip connected with this sampling resistor R27 and is connected with this reference voltage chip. The transistor Q3, the reference voltage chip and the transistor Q3 are both connected to the first optocoupler connection.

Further, in the above technical solution, the grid circuit auxiliary detection loop includes an AC input sampling unit and a control feedback system loop, the AC input sampling unit and the control feedback system loop are connected through a second optocoupler, and the AC input sampling unit is connected with the control feedback system loop through a second optocoupler. The sampling unit is connected to the AC input terminal, and the control feedback system loop is connected to the output interface.

Further, in the above technical solution, the AC input sampling unit includes a sampling resistor R17, a sampling resistor R18, a sampling resistor R19, a diode D7 and a diode D5 connected in series in sequence, and the sampling resistor R17 is connected to the positive pole of the AC input terminal, The cathode of the diode D5 is connected to the cathode of the AC input terminal, and the cathode of the diode D7 and the anode of the diode D5 are connected to the second optocoupler.

Further, in the above technical solution, the control feedback system loop includes a MOS transistor Q1, the G pole of the MOS transistor Q1 is connected to the resistor R51 and then connected to the second optocoupler, and the D pole of the MOS transistor Q1 is connected to the second optocoupler. Connect the output interface.

Further, in the above technical solution, an RT thermistor is arranged between the AC input end and the EMI filter unit; and a PTC thermistor is connected to the 27V output end.

Further, in the above technical solution, the 27V output rectifier unit includes a π-shaped filter connected to the transformer unit and composed of an inductor L1, a capacitor C11, and a capacitor C10, and a first common mode connected to the π-shaped filter. The inductor LF3 and the 27V output terminal connected to the first common mode inductor LF3.

Further, in the above technical solution, the 5V output rectifier unit includes a fuse F2 connected to the 27V output end, a resistor R33 connected to the fuse F2 in turn, a transistor Q4 connected to the resistor R33, an inductor L2 and the described The 5V output terminal and the power management chip that is connected to the resistor R33 and controls whether the transistor Q4 is turned on or not.

After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: after the utility model is connected to the mains, it can output 27V and 5V DC regulated power supplies to meet different usage requirements, and the utility model A power grid circuit auxiliary detection circuit is added, and the AC input AC power is rectified and sampled through the power grid circuit auxiliary detection circuit, and the grid condition is fed back to the main control board of the sewing machine. The purpose of this is to improve the stability of the sewing machine. , that is, when the sewing machine starts for a moment, first determine whether the voltage of the power grid has reached the safe starting voltage. If there is a sewing machine, it will enter the starting mode. The utility model has strong market competitiveness.

Description of drawings:

Figure 1 is a circuit diagram of the present utility model.

Detailed ways:

The present utility model will be further described below with reference to specific embodiments and accompanying drawings.

As shown in Figure 1, it is an intelligent sewing machine power control system, which includes an AC input terminal 1, an EMI filter unit 2, a rectifier filter unit 3, a transformer unit 4, a 27V output rectifier unit 5, and a 27V output rectifier unit connected in sequence. The 5V output rectifier unit 7 connected to the 27V output end 51 of The 27V output terminal 51 of the unit 5 and the 5V output terminal 71 of the 5V output rectifier unit 7 are both connected to the output interface 10, and the AC input terminal 1 is also connected to a grid circuit auxiliary detection circuit 6, which is connected to the output interface. 10. The output interface 10 is connected to the main control board of the sewing machine. After the utility model is connected to the mains, it can output 27V and 5V DC regulated power supplies to meet different use requirements, and the utility model is additionally provided with a grid circuit auxiliary detection circuit 6, and through the grid circuit auxiliary detection circuit 6, AC The input AC power is sampled through rectification, and the situation of the power grid will be fed back to the main control board of the sewing machine. The purpose of this is to improve the stability of the sewing machine. That is, when the sewing machine starts, first determine whether the voltage of the power grid has reached a safe start. If there is a sewing machine, the sewing machine will enter the startup mode, if not, it will continue to wait, which effectively reduces the load of the power grid, makes it safer and more reliable to use, and makes the utility model highly competitive in the market.

The PWM control unit 8 includes a PWM main control chip 81, which is connected to the output voltage feedback loop 9 through a first optocoupler 82, and the model of the PWM main control chip 81 is TEA1733T. TEA1733T is a fixed frequency IC with low operating current, high efficiency and operating frequency of 65KHz. It has functions such as short circuit protection and external temperature protection.

The output voltage feedback loop 9 includes a sampling resistor R28 and a sampling resistor R27 connected with the 27V output rectifier unit 5 and a reference voltage chip 91 connected with the sampling resistor R27 and a transistor Q3 connected with the reference voltage chip 91. The reference voltage chip 91 and the transistor Q3 are both connected to the first optocoupler 82 . After the output voltage is divided by the sampling resistor R28 and the sampling resistor R27, it is compared with the reference pin (pin 1) of the reference voltage chip 91, so as to control the luminous intensity of the diode inside the first optocoupler 82, and feed it back to the primary in the form of voltage. PWM main control chip 81 . The PWM main control chip 81 adjusts the width of the pulse according to the size of the feedback voltage, and finally stabilizes the output voltage.

The grid circuit auxiliary detection loop 6 includes an AC input sampling unit 61 and a control feedback system loop 62, the AC input sampling unit 61 and the control feedback system loop 62 are connected through a second optocoupler 63, the AC input sampling unit 61 Connected to the AC input 1 , the control feedback system loop 62 is connected to the output interface 10 .

The AC input sampling unit 61 includes a sampling resistor R17, a sampling resistor R18, a sampling resistor R19, a diode D7 and a diode D5 which are connected in series in sequence, the sampling resistor R17 is connected to the anode of the AC input terminal 1, and the cathode of the diode D5 is connected to the AC The cathode of the input terminal 1 , the cathode of the diode D7 and the anode of the diode D5 are connected to the second optocoupler 63 .

The AC input voltage passes through the sampling resistor R17, the sampling resistor R18, the sampling resistor R19, the diode D7, the second optocoupler 63, and the diode D5 to form a half-wave rectification loop. When the diode D5 is turned on, the second optocoupler 63 is turned on, forming a A photosensitive signal is passed to the control feedback system loop 62 .

The control feedback system loop 62 includes a MOS transistor Q1, the G pole of the MOS transistor Q1 is connected to the resistor R51 and then connected to the second optocoupler 63, and the D pole of the MOS transistor Q1 and the second optocoupler 63 are connected to the output interface 10. . When receiving the voltage signal transmitted from the AC input sampling unit 61, the driving MOS transistor Q1 is turned on, the output terminal LINE is in the floating state, and enters the 0-level potential to be transmitted to the main control board of the sewing machine.

An RT thermistor 11 is arranged between the AC input end 1 and the EMI filter unit 2 ; the 27V output end 51 is connected with a PTC thermistor 52 . When the sewing machine enters the abnormal working mode, when the secondary current rises rapidly, the resistance of the PTC thermistor 52 will increase with the increase of the current, and it will fuse after about 5 minutes, and the PTC thermistor 52 will automatically recover when the abnormality is removed. When the load is not overloaded or over-power, the PTC thermistor 52 will not act. At this time, if the temperature of the whole machine is too high, the 6-pin of the PWM main control chip 81 will act, and the primary PWM will be turned off to force the output to be turned off.

The 27V output rectifier unit 5 includes a π-shaped filter composed of an inductor L1, a capacitor C11, and a capacitor C10 connected to the transformer unit 4, a first common mode inductor LF3 connected to the π-shaped filter, and a first common mode inductor LF3 connected to the first The 27V output terminal 51 connected to the common mode inductor LF3.

The 5V output rectifier unit 7 includes a fuse F2 connected to the 27V output terminal 51, a resistor R33 connected to the fuse F2 in turn, a transistor Q4 connected to the resistor R33, an inductor L2, and the 5V output terminal 71 and the The resistor R33 is connected to the power management chip 72 that controls whether the transistor Q4 is turned on or not.

To sum up, after the utility model is connected to the mains, it can output 27V and 5V DC regulated power supplies to meet different usage requirements, and the utility model is additionally provided with a grid circuit auxiliary detection circuit 6, which is assisted by the grid circuit. The detection circuit 6 samples the AC input AC power through rectification, and feeds back the status of the power grid to the main control board of the sewing machine. The purpose of this is to improve the stability of the sewing machine, that is, when the sewing machine starts, first determine the voltage of the power grid. Whether the safe starting voltage is reached, the sewing machine enters the starting mode if there is a sewing machine, and if not, it continues to wait, which effectively reduces the load of the power grid, makes it safer and more reliable to use, and makes the utility model highly competitive in the market.

Of course, the above are only specific embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made in accordance with the structures, features and principles described in the scope of the patent application of the present invention are not intended to limit the scope of the present invention. It should be included in the scope of the patent application of this utility model.

Claims (9)

1. Intelligence sewing machine power control system, its characterized in that: which comprises an AC input end (1), an EMI filtering unit (2), a rectifying and filtering unit (3), a transformer unit (4), a 27V output rectifying unit (5), a 5V output rectifying unit (7) connected with a 27V output end (51) of the 27V output rectifying unit (5), a PWM control unit (8) connected with the transformer unit (4), and an output voltage feedback loop (9) connected with the PWM control unit (8) and the 27V output rectifying unit (5), the 27V output end (51) of the 27V output rectifying unit (5) and the 5V output end (71) of the 5V output rectifying unit (7) are both connected with an output interface (10), and the AC input end (1) is also connected with a power grid circuit auxiliary detection loop (6), the power grid circuit auxiliary detection loop (6) is connected with an output interface (10), and the output interface (10) is connected with a main control panel of the sewing machine.

2. The intelligent sewing machine power control system of claim 1, wherein: the PWM control unit (8) comprises a PWM main control chip (81), the PWM main control chip (81) is connected with an output voltage feedback loop (9) through a first optical coupler (82), and the model of the PWM main control chip (81) is TEA 1733T.

3. The intelligent sewing machine power control system of claim 2, wherein: the output voltage feedback loop (9) comprises a sampling resistor R28 and a sampling resistor R27 which are connected with the 27V output rectifying unit (5), a reference voltage chip (91) which is connected with the sampling resistor R27 and a triode Q3 which is connected with the reference voltage chip (91), wherein the reference voltage chip (91) and the triode Q3 are both connected with the first optocoupler (82).

4. The intelligent sewing machine power control system of any one of claims 1-3, wherein: the power grid circuit auxiliary detection loop (6) comprises an AC input sampling unit (61) and a control feedback system loop (62), the AC input sampling unit (61) is connected with the control feedback system loop (62) through a second optical coupler (63), the AC input sampling unit (61) is connected with an AC input end (1), and the control feedback system loop (62) is connected with the output interface (10).

5. The intelligent sewing machine power control system of claim 4, wherein: the AC input sampling unit (61) comprises a sampling resistor R17, a sampling resistor R18, a sampling resistor R19, a diode D7 and a diode D5 which are sequentially connected in series, wherein the sampling resistor R17 is connected with the anode of the AC input end (1), the cathode of the diode D5 is connected with the cathode of the AC input end (1), and the cathode of the diode D7 and the anode of the diode D5 are connected with the second optocoupler (63).

6. The intelligent sewing machine power control system of claim 4, wherein: the control feedback system loop (62) comprises an MOS transistor Q1, the G pole of the MOS transistor Q1 is connected with a resistor R51 and then connected with a second optical coupler (63), and the D pole of the MOS transistor Q1 and the second optical coupler (63) are connected with the output interface (10).

7. The intelligent sewing machine power control system of claim 4, wherein: an RT thermistor (11) is arranged between the AC input end (1) and the EMI filtering unit (2); and the 27V output end (51) is connected with a PTC thermistor (52).

8. The intelligent sewing machine power control system of claim 4, wherein: the 27V output rectifying unit (5) comprises a pi-shaped filter which is connected with the transformer unit (4) and consists of an inductor L1, a capacitor C11 and a capacitor C10, a first common mode inductor LF3 connected with the pi-shaped filter, and the 27V output end (51) connected with the first common mode inductor LF 3.

9. The intelligent sewing machine power control system of claim 4, wherein: the 5V output rectifying unit (7) comprises a fuse F2 connected with a 27V output end (51), a resistor R33 sequentially connected with the fuse F2, a triode Q4 connected with the resistor R33, an inductor L2, the 5V output end (71) and a power management chip (72) connected with the resistor R33 and controlling the conduction of the triode Q4.

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