CN213888632U - Power supply control circuit of electromagnetic welding machine - Google Patents
Power supply control circuit of electromagnetic welding machine Download PDFInfo
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- CN213888632U CN213888632U CN202022937132.0U CN202022937132U CN213888632U CN 213888632 U CN213888632 U CN 213888632U CN 202022937132 U CN202022937132 U CN 202022937132U CN 213888632 U CN213888632 U CN 213888632U
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Abstract
A power supply control circuit of an electromagnetic welding machine comprises a starting voltage output module, a voltage transformation module, a pulse width control module and a voltage output module, wherein the starting voltage output module comprises two alternating current 220V electric input ends P1, a fuse F1, a filter L1, a thermistor RT1, a relay K1, a rectifier bridge DB1, a capacitor C6, a capacitor C8, a switch tube Q1, a group of first resistors and a PWM power supply chip U4, the output end of the two alternating current 220V electric input ends P1 is electrically connected with the input end of the filter L1 through the fuse F1, and the output end of the filter L1 is electrically connected with the input end of the rectifier bridge DB1 through the thermistor RT1 and the relay K1; the advantages are that: the power required by the electromagnetic welding machine is adjusted in real time, the purpose of stabilizing voltage and current is achieved, and the welding quality of a welding part is improved.
Description
Technical Field
The utility model relates to an electromagnetic welding machine control circuit field, concretely relates to electromagnetic welding machine power supply control circuit.
Background
At present, the existing high-frequency electromagnetic welding technology heats a workpiece to be welded by using an electromagnetic induction principle, namely, by using eddy current, and has incomparable advantages compared with the traditional heating mode. The core of this technology is the development of solid state welding power sources. In order to heat the workpiece continuously and uniformly, the power supply is required to have constant power output capability. If the traditional direct rectification mode is adopted for power supply, the dynamic response overshoot is large, the stability is poor, and the output power is influenced by the voltage fluctuation of a power grid and the load change, so that the reliability of the welding power supply is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above insufficiency and provide a power supply control circuit of an electromagnetic welding machine.
The utility model comprises a starting voltage output module, a voltage transformation module, a pulse width control module and a voltage output module,
the starting voltage output module comprises two alternating current 220V electric input ends P1, a fuse F1, a filter L1, a thermistor RT1, a relay K1, a rectifier bridge DB1, a capacitor C6, a capacitor C8, a switching tube Q1, a group of first resistors and a PWM power chip U4,
the output end of an alternating current 220V two-phase electric input end P1 is electrically connected with the input end of a filter L1 through a fuse F1, the output end of the filter L1 is electrically connected with the input end of a rectifier bridge DB1 through a thermistor RT1 and a relay K1, a capacitor C6 and a capacitor C8 are connected with a rectifier bridge DB1 in parallel, a first output end of the rectifier bridge DB1 is electrically connected with a pin of a switch tube Q1, a second output end of the rectifier bridge DB1 is electrically connected with a pin 2 of a PWM power supply chip U4 through a group of first resistors,
the transformation module comprises a transformer BT12, a diode D12, a capacitor E3, a capacitor C43, a capacitor E4 and a three-terminal voltage-stabilizing chip VO1,
the input end of the transformer BT12 is electrically connected with the output end of the PWM power chip U4, the capacitor E3, the capacitor C43 and the capacitor E4 are respectively connected with the output end of the transformer BT12 in parallel, the three-terminal voltage-stabilizing chip VO1 is electrically connected with the output end of the transformer BT12,
the pulse width control module comprises a switch mode pulse width modulation controller chip U6, a photoelectric coupler U7 and a composite triode,
a pin 12 of the switch mode pulse width modulation controller chip U6 is electrically connected with the output end of a three-terminal voltage stabilization chip VO1, a pin 8 of the switch mode pulse width modulation controller chip U6 is electrically connected with a pin 3 of a photoelectric coupler U7, a pin 6 of the photoelectric coupler U7 is electrically connected with a Q2 end of a composite triode, the output end of the composite triode is electrically connected with a pin of a switch tube Q1,
the voltage output module comprises a rectifying tube D1, an inductor RL1, a capacitor C44, a capacitor C45, a capacitor C27 and a voltage using output end, an output pin of a switch tube Q1 is electrically connected with the rectifying tube D1, the inductor RL1 is connected with the output pin of the switch tube Q1 in series, the capacitor C44, the capacitor C45 and the capacitor C27 are connected with the rectifying tube D1 in parallel, and the voltage using output end is electrically connected with the output end of the inductor RL 1.
Pin 16 of the switch mode pwm controller chip U6 is electrically connected to the time control chip module U8, the time control chip module U8 is used for delay control, pin 14 of the switch mode pwm controller chip U6 is electrically connected to pin 3 of the voltage comparator module U9, pin 12 of the switch mode pwm controller chip U6 is electrically connected to pin 4 of the voltage comparator module U9, pin 1 of the voltage comparator module U9 is electrically connected to pin 2 of the time control chip module U8, and the voltage comparator module U9 is used for output short-circuit protection of the power supply.
The output end of the relay K1 is electrically connected with a delay circuit module, and the pin 3 of a time base integrated controller U3 of the delay circuit module is electrically connected with the output end of the relay K1.
The input end of the sampling circuit module is electrically connected with the 15V output end of the transformer BT12, and the optical coupler U5 of the sampling circuit module is used for controlling the 15V output range.
The first resistor group consists of a resistor R36, a resistor R37, a resistor R38 and a resistor R53.
The utility model has the advantages that: the power required by the electromagnetic welding machine is adjusted in real time, the purpose of stabilizing voltage and current is achieved, and the welding quality of a welding part is improved.
Description of the drawings
Fig. 1 is a schematic structural diagram of the voltage output module of the present invention.
Fig. 2 is a schematic structural diagram of the pulse width control module of the present invention.
Fig. 3 is a schematic structural diagram of the voltage transformation module of the present invention.
Fig. 4 is a schematic structural diagram of the sampling circuit module of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention usually place when using, the present invention is only used for convenience of description and simplification of the description, but does not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and thus, the present invention should not be construed as being limited. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance. In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in the attached drawings, the utility model comprises a starting voltage output module, a voltage transformation module, a pulse width control module and a voltage output module,
the starting voltage output module comprises two alternating current 220V electric input ends P1, a fuse F1, a filter L1, a thermistor RT1, a relay K1, a rectifier bridge DB1, a capacitor C6, a capacitor C8, a switching tube Q1, a group of first resistors and a PWM power chip U4,
the output end of an alternating current 220V two-phase electric input end P1 is electrically connected with the input end of a filter L1 through a fuse F1, the output end of the filter L1 is electrically connected with the input end of a rectifier bridge DB1 through a thermistor RT1 and a relay K1, a capacitor C6 and a capacitor C8 are connected with a rectifier bridge DB1 in parallel, a first output end of the rectifier bridge DB1 is electrically connected with a pin of a switch tube Q1, a second output end of the rectifier bridge DB1 is electrically connected with a pin 2 of a PWM power supply chip U4 through a group of first resistors,
the transformation module comprises a transformer BT12, a diode D12, a capacitor E3, a capacitor C43, a capacitor E4 and a three-terminal voltage-stabilizing chip VO1,
the input end of the transformer BT12 is electrically connected with the output end of the PWM power chip U4, the capacitor E3, the capacitor C43 and the capacitor E4 are respectively connected with the output end of the transformer BT12 in parallel, the three-terminal voltage-stabilizing chip VO1 is electrically connected with the output end of the transformer BT12,
the pulse width control module comprises a switch mode pulse width modulation controller chip U6, a photoelectric coupler U7 and a composite triode,
a pin 12 of the switch mode pulse width modulation controller chip U6 is electrically connected with the output end of a three-terminal voltage stabilization chip VO1, a pin 8 of the switch mode pulse width modulation controller chip U6 is electrically connected with a pin 3 of a photoelectric coupler U7, a pin 6 of the photoelectric coupler U7 is electrically connected with a Q2 end of a composite triode, the output end of the composite triode is electrically connected with a pin of a switch tube Q1,
the voltage output module comprises a rectifying tube D1, an inductor RL1, a capacitor C44, a capacitor C45, a capacitor C27 and a voltage using output end, an output pin of a switch tube Q1 is electrically connected with the rectifying tube D1, the inductor RL1 is connected with the output pin of the switch tube Q1 in series, the capacitor C44, the capacitor C45 and the capacitor C27 are connected with the rectifying tube D1 in parallel, and the voltage using output end is electrically connected with the output end of the inductor RL 1.
Pin 16 of the switch mode pwm controller chip U6 is electrically connected to the time control chip module U8, the time control chip module U8 is used for delay control, pin 14 of the switch mode pwm controller chip U6 is electrically connected to pin 3 of the voltage comparator module U9, pin 12 of the switch mode pwm controller chip U6 is electrically connected to pin 4 of the voltage comparator module U9, pin 1 of the voltage comparator module U9 is electrically connected to pin 2 of the time control chip module U8, and the voltage comparator module U9 is used for output short-circuit protection of the power supply.
The output end of the relay K1 is electrically connected with a delay circuit module, and the pin 3 of a time base integrated controller U3 of the delay circuit module is electrically connected with the output end of the relay K1.
The input end of the sampling circuit module is electrically connected with the 15V output end of the transformer BT12, and the optical coupler U5 of the sampling circuit module is used for controlling the 15V output range.
The first resistor group consists of a resistor R36, a resistor R37, a resistor R38 and a resistor R53.
The working mode and principle are as follows: A220V-AC power supply is input from a P1, rectified by a Fuse F1 (Fuse Thermal), a filter L1, a thermistor RT1(Res Thermal), a Relay K1(Relay-DPST) and a rectifier bridge DB1(D25XB-60), filtered by a capacitor C6 and a capacitor C8 to obtain 300V direct-current voltage, and added to a switching tube Q1(MOSFET-N), when the voltage is +300V, the voltage is added to a 2 pin of a PWM power supply chip U4(6359) through a resistor R36, a resistor R37, a resistor R38 and a resistor R53, and the starting voltage of the chip is established.
When the voltage meets the starting voltage of the chip, the chip generates a PWM pulse signal to drive the transformer BT12 to work, and the electromagnetic coupling principle of the transformer is adopted, so that the secondary of the transformer BT12 has a voltage +15V output, the voltage is stabilized by a three-terminal voltage stabilizing chip VO1(78L12) to obtain a stable 12V voltage, the stable 12V voltage is added to a pin 12 of a switch mode pulse width modulation controller chip U6, the chip enters a working state to generate the PWM pulse, the driving pulse is output by a pin 8, is isolated by a photocoupler U7(6N137), is output by a pin 6 of a photocoupler U7, passes through a Q2 end of a composite triode (ZXYD 4591E 6) to carry out current amplification, and drives a switch tube Q1 to work,
when the switching tube Q1 works, the voltage of 300V is filtered by the rectifier tube D1(FF60UA60AN), the capacitor C44 and the capacitor C45 to obtain a voltage of 250V for the electromagnetic induction heater to use,
and the U8 time control chip is used for time delay control.
And the U9 voltage comparator is used for output short-circuit protection of the power supply.
The module utilizes the functions among different circuits of the switching power supply, and combines and optimizes the functions to meet the use requirement of the module.
As shown in FIG. 4, an optical coupler U5(PS 2501L-1).
The circuit module takes a voltage signal on the output 15V, adjusts PWM through optical coupling isolation, and controls the output 15V to be stored in a certain range.
As shown in fig. 1, the time base integrated controller U3(NE555),
the time delay circuit module utilizes 555 time control function, when 220V alternating current is input, the alternating current is rectified by the rectifier bridge DB1 and then is supplied to a capacitor, the characteristics of the capacitor know that when 300V direct current is supplied to the capacitor to start charging, the current which is charged to the capacitor in a short circuit state at two ends of the capacitor is very large and exceeds the rated current of the rectifier bridge, in order to avoid failure of the rectifier bridge, the 555 circuit is utilized to make a time delay circuit, when the capacitor is electrified, the relay K1 is not attracted, the alternating current is limited by the thermistor RT1 and then is rectified by the rectifier bridge DB1 to charge the capacitor, when the capacitor is fully charged by 300V, the U4 auxiliary power supply is started, the +12V is established, when 555 working voltage exists, high level is output, the relay K1 is attracted, and the starting process is completed.
Claims (5)
1. A power supply control circuit of an electromagnetic welding machine is characterized by comprising a starting voltage output module, a voltage transformation module, a pulse width control module and a voltage output module,
the starting voltage output module comprises two alternating current 220V electric input ends P1, a fuse F1, a filter L1, a thermistor RT1, a relay K1, a rectifier bridge DB1, a capacitor C6, a capacitor C8, a switching tube Q1, a group of first resistors and a PWM power chip U4,
the output end of an alternating current 220V two-phase electric input end P1 is electrically connected with the input end of a filter L1 through a fuse F1, the output end of the filter L1 is electrically connected with the input end of a rectifier bridge DB1 through a thermistor RT1 and a relay K1, a capacitor C6 and a capacitor C8 are connected with a rectifier bridge DB1 in parallel, a first output end of the rectifier bridge DB1 is electrically connected with a pin of a switch tube Q1, a second output end of the rectifier bridge DB1 is electrically connected with a pin 2 of a PWM power supply chip U4 through a group of first resistors,
the transformation module comprises a transformer BT12, a diode D12, a capacitor E3, a capacitor C43, a capacitor E4 and a three-terminal voltage-stabilizing chip VO1,
the input end of the transformer BT12 is electrically connected with the output end of the PWM power chip U4, the capacitor E3, the capacitor C43 and the capacitor E4 are respectively connected with the output end of the transformer BT12 in parallel, the three-terminal voltage-stabilizing chip VO1 is electrically connected with the output end of the transformer BT12,
the pulse width control module comprises a switch mode pulse width modulation controller chip U6, a photoelectric coupler U7 and a composite triode,
a pin 12 of the switch mode pulse width modulation controller chip U6 is electrically connected with the output end of a three-terminal voltage stabilization chip VO1, a pin 8 of the switch mode pulse width modulation controller chip U6 is electrically connected with a pin 3 of a photoelectric coupler U7, a pin 6 of the photoelectric coupler U7 is electrically connected with a Q2 end of a composite triode, the output end of the composite triode is electrically connected with a pin of a switch tube Q1,
the voltage output module comprises a rectifying tube D1, an inductor RL1, a capacitor C44, a capacitor C45, a capacitor C27 and a voltage using output end, an output pin of a switch tube Q1 is electrically connected with the rectifying tube D1, the inductor RL1 is connected with the output pin of the switch tube Q1 in series, the capacitor C44, the capacitor C45 and the capacitor C27 are connected with the rectifying tube D1 in parallel, and the voltage using output end is electrically connected with the output end of the inductor RL 1.
2. The power supply control circuit of an electromagnetic welding machine as claimed in claim 1, characterized in that the pin 16 of the switch mode pulse width modulation controller chip U6 is electrically connected with the time control chip module U8, the time control chip module U8 is used for time delay control, the pin 14 of the switch mode pulse width modulation controller chip U6 is electrically connected with the pin 3 of the voltage comparator module U9, the pin 12 of the switch mode pulse width modulation controller chip U6 is electrically connected with the pin 4 of the voltage comparator module U9, the pin 1 of the voltage comparator module U9 is electrically connected with the pin 2 of the time control chip module U8, and the voltage comparator module U9 is used for output short circuit protection of the power supply.
3. The power supply control circuit of the electromagnetic welding machine according to the claim 1, characterized in that the output terminal of the relay K1 is electrically connected with a time delay circuit module, and the pin 3 of the time base integrated controller U3 of the time delay circuit module is electrically connected with the output terminal of the relay K1.
4. The power supply control circuit of an electromagnetic welder according to claim 1, characterized in that it further comprises a sampling circuit module, the input terminal of the sampling circuit module is electrically connected with the 15V output terminal of the transformer BT12, and the optical coupler U5 of the sampling circuit module is used for controlling the 15V output range.
5. The power supply control circuit of an electromagnetic welder according to claim 1, characterized in that the first set of resistors is composed of a resistor R36, a resistor R37, a resistor R38 and a resistor R53.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937132.0U CN213888632U (en) | 2020-12-10 | 2020-12-10 | Power supply control circuit of electromagnetic welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937132.0U CN213888632U (en) | 2020-12-10 | 2020-12-10 | Power supply control circuit of electromagnetic welding machine |
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| Publication Number | Publication Date |
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| CN213888632U true CN213888632U (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022937132.0U Active CN213888632U (en) | 2020-12-10 | 2020-12-10 | Power supply control circuit of electromagnetic welding machine |
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| CN (1) | CN213888632U (en) |
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