CN221158952U - Constant-current charging type energy storage resistance welder system circuit - Google Patents
Constant-current charging type energy storage resistance welder system circuit Download PDFInfo
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- CN221158952U CN221158952U CN202323154355.XU CN202323154355U CN221158952U CN 221158952 U CN221158952 U CN 221158952U CN 202323154355 U CN202323154355 U CN 202323154355U CN 221158952 U CN221158952 U CN 221158952U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 55
- 238000010277 constant-current charging Methods 0.000 title claims abstract description 21
- 238000007600 charging Methods 0.000 claims abstract description 109
- 239000003990 capacitor Substances 0.000 claims abstract description 67
- 238000003466 welding Methods 0.000 claims abstract description 35
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 32
- 229910052710 silicon Inorganic materials 0.000 claims description 32
- 239000010703 silicon Substances 0.000 claims description 32
- 230000000670 limiting effect Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a constant-current charging type energy storage resistance welding machine system circuit which comprises a full-bridge half-control rectifying module, a charging control module, an energy storage capacitor C and a controller module, wherein the full-bridge half-control rectifying module is electrically connected with the charging control module, a filter capacitor C1 is connected between loops formed by the full-bridge half-control rectifying module and the charging control module, the charging control module is a charging IGBTQ1, a charging loop is formed between the charging IGBTQ1 and the energy storage capacitor C, an inductance element and a follow current element are connected on the charging loop, the controller module is electrically connected with the full-bridge half-control rectifying module and the charging IGBTQ1 respectively, and the controller module is also connected with a display module. The constant charging current is realized by adjusting the duty ratio of the charging IGBTQ1, and the problems of low current limiting effect and heating of the resistor in the traditional circuit are solved.
Description
Technical Field
The utility model belongs to the technical field of energy storage resistance welding machines, and particularly relates to a constant-current charging type energy storage resistance welding machine system circuit.
Background
In conventional energy storage welder circuits, the internal resistance of the capacitor is almost zero at the beginning of the capacitor charge, so at the instant of the start of the charge, the charge current can reach hundreds of amperes or even higher, which is related to the charge voltage, and then decreases dramatically as the voltage across the capacitor increases. Excessive charging current can cause the capacitor to heat and damage, even explosion occurs, and safety accidents are caused. In order to reduce the charging current, a current limiting resistor must be connected in series in the charging loop.
The current limiting resistor is used for limiting the current, so that the current does not exceed the maximum current born by the capacitor. But when charged half the energy is wasted by the resistor, i.e. 1000 joules are lost in the resistor if the capacitor is charged 1000 joules.
Disclosure of utility model
In order to solve the problems, the utility model provides a constant-current charging type energy storage resistance welding machine system circuit, which comprises a full-bridge half-control rectifying module, a charging control module, an energy storage capacitor C and a controller module, wherein the full-bridge half-control rectifying module is electrically connected with the charging control module, a filter capacitor C1 is connected between loops formed by the full-bridge half-control rectifying module and the charging control module, the charging control module is charging IGBTQ1, a charging loop is formed between the charging IGBTQ1 and the energy storage capacitor C, an inductance element and a freewheeling element are connected on the charging loop, the controller module is electrically connected with the full-bridge half-control rectifying module and the charging IGBTQ1 respectively, and the controller module is also connected with a display module.
Preferably, the inductance element is a charge filter inductance L.
Preferably, the freewheeling element is a charging freewheeling diode DF.
Preferably, the energy storage capacitor C is further electrically connected with a welding transformer, a discharge loop is formed between the energy storage capacitor C and the welding transformer, and a unidirectional discharge control module is connected to the discharge loop.
Preferably, the inductance element is a welding transformer.
Preferably, the freewheeling element is a discharge IGBTQ2 or a thyristor D8 and a diode D9 connected in parallel.
Preferably, the input end of the inductance element is connected with a first current sensor A1.
Preferably, the input end of the welding transformer is connected with a second current sensor A2.
Preferably, the full-bridge half-controlled rectifier module includes a silicon controlled rectifier D2, a silicon controlled rectifier D3, a silicon controlled rectifier D4, a diode D5, a diode D6 and a diode D7, anodes of the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are respectively electrically connected with cathodes of the diode D5, the diode D6 and the diode D7, anodes of the diode D5, the diode D6 and the diode D7 are electrically connected with cathodes of the filter capacitor C1, and cathodes of the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are electrically connected with anodes of the filter capacitor C1.
Preferably, the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are electrically connected with a three-phase power supply, one phase of the three-phase power supply is electrically connected with a charging diode D1, the charging diode is electrically connected with a charging resistor R1, and the other end of the charging resistor R1 is electrically connected with the silicon controlled rectifier D2.
The utility model has the advantages that:
1. According to the scheme, constant-current charging is realized by adjusting the duty ratio of the charging IGBTQ1, the conventional charging resistor is replaced, and in constant-current charging, the charging current is accurately maintained at a required value, so that the current cannot exceed the maximum current bearable by the capacitor, and the problems of low current limiting efficiency, energy waste and heating of the charging resistor in an original band circuit are solved due to the fact that the charging resistor is not needed.
2. In the scheme, elements such as the filter inductor L, the energy storage capacitor C and the like can be used for recovering and storing energy. When the charging current is stopped, the filter inductor releases the stored energy to continue to charge the capacitor without wasting the energy.
3. The present scheme performs discharge control by using one IGBT at the time of discharge. By setting the discharge time to reduce the loss of the useless current, a part of energy can be saved.
Drawings
FIG. 1 is a diagram of the overall system framework of the present utility model.
Fig. 2 is a circuit diagram of embodiment 1 of the present utility model.
Fig. 3 is a circuit diagram of another embodiment 1 of the present utility model.
Fig. 4 is a circuit diagram of embodiment 2 of the present utility model.
Fig. 5 is a circuit diagram of another embodiment 2 of the present utility model.
Fig. 6 is a third circuit diagram of embodiment 2 of the present utility model.
In the figure: the full-bridge half-control rectifier comprises a full-bridge half-control rectifier module 1, a charging control module 2, a controller module 3, a display module 4, an alternate discharging control module 5 and a welding transformer 6.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1
As shown in fig. 1-2, a constant current charging type energy storage resistance welder system circuit comprises a full-bridge half-control rectifying module 1, a charging IGBTQ1, an energy storage capacitor C and a controller module 3, wherein the full-bridge half-control rectifying module 1 is electrically connected with the charging control module, a filter capacitor C1 is connected between loops formed by the full-bridge half-control rectifying module 1 and the charging control module, a charging loop is formed between the charging IGBTQ1 and the energy storage capacitor C, an inductance element and a follow current element are connected on the charging loop, the controller module 3 is electrically connected with the full-bridge half-control rectifying module 1 and the charging IGBTQ1 respectively, and the controller module 3 is also connected with a display module 4. IGBTs are semiconductor devices that combine the advantages of field effect transistors and bipolar transistors, and IGBTs are used mainly as power switches in circuits that can handle large currents and high voltages.
The controller module 3 converts an alternating current power supply into a direct current power supply through triggering the full-bridge half-control rectifying module 1, so that the alternating current power supply charges the energy storage capacitor C, current can firstly pass through the filter capacitor C1, the filter capacitor C1 has the main functions of filtering high-frequency noise, smoothing direct current voltage and stabilizing voltage waveforms in a circuit, so that the normal operation of the circuit is ensured, and the filter capacitor C1 is connected with a resistor in parallel, so that better filtering effect and stability can be realized. The current can be directly charged into the energy storage capacitor C after being regulated and controlled by the charging IGBTQ 1. Constant-current charging can be realized by adjusting the duty ratio of the charging IGBTQ1, the conventional charging resistor is replaced, and in constant-current charging, the charging current is accurately maintained at a required value, so that the current does not exceed the maximum current which can be born by a capacitor, and the problems of low current limiting efficiency, energy waste and heating of the charging resistor in an original band circuit are solved because the charging resistor is not needed. The charging IGBTQ1 is controlled by the controller module 3, the input end of the inductance element is connected with a first current sensor A1, and the first current sensor A1 monitors the charging current and feeds the charging current back to the controller so as to ensure the stability of the current. The controller module 3 is also connected to the storage capacitor C and the circuit around the filter capacitor C1 for voltage sampling.
Referring to fig. 2, a charging loop is formed between the charging IGBTQ1 and the energy storage capacitor C, and an inductance element and a freewheeling element are connected to the charging loop, where in this embodiment, the inductance element is a charging filter inductance L, and the freewheeling element is a charging freewheeling diode DF. When the charging IGBTQ1 is turned on, current flows into the energy storage capacitor C through the charging filter inductor L, when the charging IGBTQ1 is turned off, the charging filter inductor L is used as a power supply at the moment due to the existence of the charging filter inductor L, and the charging filter inductor L, the energy storage capacitor C and the charging freewheeling diode form a current loop to continuously charge the energy storage capacitor C. The current loop direction is the right end of the charging filter inductance L, the energy storage capacitor C, the charging freewheeling diode DF and the left end of the charging filter inductance L, until the voltage of the energy storage capacitor C reaches the preset target voltage, and then the charging is stopped. The charge filter inductance L may be used to recover and store energy. When the charging current stops, the filter inductor releases the stored energy to continue to charge the storage capacitor C without wasting the energy.
In this embodiment, the full-bridge half-controlled rectifier module includes a thyristor D2, a thyristor D3, a thyristor D4, a diode D5, a diode D6, and a diode D7, where anodes of the thyristor D2, the thyristor D3, and the thyristor D4 are electrically connected to cathodes of the diode D5, the diode D6, and the diode D7, respectively, anodes of the diode D5, the diode D6, and the diode D7 are electrically connected to cathodes of the filter capacitor C1, and cathodes of the thyristor D2, the thyristor D3, and the thyristor D4 are electrically connected to anodes of the filter capacitor C1.
The anodes of the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are electrically connected with a three-phase power supply, one phase of the three-phase power supply is electrically connected with the anode of the charging diode D1, the cathode of the charging diode D1 is electrically connected with one end of the charging resistor R1, and the other end of the charging resistor R1 is electrically connected with the cathode of the diode D2.
At the time of starting up, 380V voltage of one phase in the three-phase power supply is transmitted to the filter capacitor C1, and initial charging of small current is started to the filter capacitor C1. Then, after a delay of 10 seconds, the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 of the full-bridge half-controlled rectifier module are turned on, so that three-phase current can enter the filter capacitor C1, and the current sequentially passes through the IGBT module Q1-the charging filter inductor L-the energy storage capacitor C, so that higher charging current is realized.
The charge filter inductance L and the energy storage capacitance C can be used for recovering and storing energy. When the charging current is stopped, the filter inductor releases the stored energy to continue to charge the capacitor without wasting the energy.
Referring to fig. 2, the energy storage capacitor C is further electrically connected with the welding transformer 6, a discharge loop is formed between the energy storage capacitor C and the welding transformer 6, a unidirectional discharge control module 5 is connected on the discharge loop, the energy storage capacitor C is connected with the input end of the welding transformer 6, the output end of the welding transformer 6 is connected with a welding workpiece, the unidirectional discharge control module 5 controls discharge, in this embodiment, the unidirectional discharge control module 5 is a discharge IGBTQ2, and one IGBT is used for performing discharge control. By setting the discharge time to reduce the loss of the useless current, a part of energy can be saved. In addition to discharging IGBTQ2, the unidirectional discharge control module 5 may also be a thyristor. The unidirectional discharge control module 5 is controlled by a controller. A second current sensor A2 is connected to the line at the input end of the welding transformer 6, and the second current sensor A2 is connected to the controller to feed current back to the controller. The controller module 3 is also connected with a display module 4, the connection mode can be a wired or wireless mode, the display module 4 is a touch screen, and the touch screen can enable an operator to control the controller module 3.
As shown in fig. 3, in the above scheme, the positions of the charging flywheel diode DF and the charging filter inductance L may be reversed, so as to change the direction of the charging current. When the charging IGBTQ1 is turned off, the charging filter inductor L charges the energy storage capacitor C, and the current loop direction is the lower end of the charging filter inductor L, the energy storage capacitor C, the charging freewheeling diode DF and the upper end of the charging filter inductor L. At this time, the anode and the cathode of the energy storage capacitor C should be opposite to those of the energy storage capacitor C in the previous technical solution.
Example 2
As shown in fig. 4, a high-efficiency energy-saving energy-storage resistance welder system circuit comprises a full-bridge half-control rectifying module 1, a charging IGBTQ1, an energy storage capacitor C and a controller module 3, wherein the full-bridge half-control rectifying module 1 is electrically connected with the charging control module, a filter capacitor C1 is connected between loops formed by the full-bridge half-control rectifying module 1 and the charging control module, a charging loop is formed between the charging IGBTQ1 and the energy storage capacitor C, an inductance element and a follow current element are connected on the charging loop, the controller module 3 is electrically connected with the full-bridge half-control rectifying module 1 and the charging IGBTQ1 respectively, and the controller module 3 is also connected with a display module 4.
The embodiment is the same as embodiment 1, and constant-current charging is realized by adjusting the duty ratio of the charging IGBTQ1, so that the conventional charging resistor is replaced, and the problems of low current limiting efficiency, energy waste and heating of the charging resistor in the original band circuit are solved. The difference between this embodiment and embodiment 1 is that the inductance element in this embodiment is directly a welding transformer 6, and the welding transformer 6 is used as the inductance element. And the freewheel element uses discharge IGBTQ2. The freewheel charge loop portion formed in this embodiment may directly serve as a discharge loop. When charging the storage capacitor C, the charging IGBTQ1 is turned on and current flows into the storage capacitor C through the welding transformer 6. When the charging IGBTQ1 is turned off, due to the existence of the welding transformer 6, the welding transformer 6 is used as a power supply, the welding transformer 6, the energy storage capacitor C and the discharging IGBTQ2 form a current loop, and the discharging IGBTQ2 itself is provided with a reverse diode and can be directly used as a freewheeling element to continuously charge the energy storage capacitor C. The current loop direction is the right end of the welding transformer 6-the energy storage capacitor C-the discharge IGBTQ 2-the left end of the welding transformer 6 until the voltage of the energy storage capacitor C reaches the preset target voltage, and then the charging is stopped. The welding transformer 6 can be used as an inductive element for recovering and storing energy. When the charging current stops, the welding transformer 6 will release the stored energy to continue to charge the storage capacitor C without wasting this energy.
When discharging, the discharge is directly controlled by the discharge IGBTQ2 to charge the welding transformer 6, and the welding transformer 6 performs the function of welding workpieces and performs welding. The input end of the welding transformer 6 is connected with a second current sensor A2, so that charging current and discharging current can be directly monitored.
As shown in fig. 5, the freewheeling element in this embodiment may also be a thyristor D8 and a diode D9 connected in parallel, where the thyristor is used for controlling discharge and the diode is used for freewheeling charging. The power supply and the full-bridge half-control rectification module 1 in this embodiment are the same as those in embodiment 1, and the specific structure of this embodiment is not repeated.
As a modification, as shown in fig. 6, the positions of the welding transformer 6 and the discharge IBGTQ in the present embodiment are reversed, and the current flow direction is changed by changing the positions. At this time, the anode and the cathode of the storage capacitor C should be opposite to those of the storage capacitor C in the technical scheme of the upper section of the present embodiment.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A constant current charging type energy storage resistance welder system circuit is characterized in that: including full bridge half accuse rectifier module (1), charge control module (2), energy storage electric capacity C and controller module (3), be connected with filter electric capacity C1 between the return circuit that full bridge half accuse rectifier module (1) and charge control module (2) electric connection and both formed, charge control module (2) are for charging IGBTQ1, be formed with the return circuit that charges between charging IGBTQ1 and the energy storage electric capacity C, be connected with inductance element and freewheel element on the return circuit that charges, controller module (3) respectively with full bridge half accuse rectifier module (1), charge IGBTQ1 electric connection, controller module (3) still are connected with display module (4).
2. The constant current charging type energy storage resistance welder system circuit of claim 1, wherein: the inductance element is a charging filter inductance L.
3. The constant current charging type energy storage resistance welder system circuit of claim 2, wherein: the freewheel element is a charging freewheel diode DF.
4. A constant current charging type energy storage resistance welder system circuit according to claim 3, wherein: the energy storage capacitor C is further electrically connected with a welding transformer (6), a discharge loop is formed between the energy storage capacitor C and the welding transformer (6), and a unidirectional discharge control module (5) is connected to the discharge loop.
5. The constant current charging type energy storage resistance welder system circuit of claim 1, wherein: the inductance element is a welding transformer (6).
6. The constant current charging type energy storage resistance welder system circuit of claim 5, wherein: the freewheeling element is a discharge IGBTQ2 or a thyristor D8 and a diode D9 connected in parallel.
7. The constant current charging type energy storage resistance welder system circuit of claim 1, wherein: the input end of the inductance element is connected with a first current sensor A1.
8. The constant current charging type energy storage resistance welder system circuit of claim 4, wherein: the input end of the welding transformer (6) is connected with a second current sensor A2.
9. The constant current charging type energy storage resistance welder system circuit of claim 1, wherein: the full-bridge half-controlled rectifier module (2) comprises a silicon controlled rectifier D2, a silicon controlled rectifier D3, a silicon controlled rectifier D4, a diode D5, a diode D6 and a diode D7, wherein anodes of the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are respectively electrically connected with cathodes of the diode D5, the diode D6 and the diode D7, anodes of the diode D5, the diode D6 and the diode D7 are electrically connected with cathodes of a filter capacitor C1, and cathodes of the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4 are electrically connected with anodes of the filter capacitor C1.
10. The constant current charging type energy storage resistance welder system circuit of claim 9, wherein: the three-phase power supply is electrically connected with the silicon controlled rectifier D2, the silicon controlled rectifier D3 and the silicon controlled rectifier D4, one phase of the three-phase power supply is electrically connected with the charging diode D1, the charging diode is electrically connected with the charging resistor R1, and the other end of the charging resistor R1 is electrically connected with the silicon controlled rectifier D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323154355.XU CN221158952U (en) | 2023-11-22 | 2023-11-22 | Constant-current charging type energy storage resistance welder system circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323154355.XU CN221158952U (en) | 2023-11-22 | 2023-11-22 | Constant-current charging type energy storage resistance welder system circuit |
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| CN221158952U true CN221158952U (en) | 2024-06-18 |
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| CN202323154355.XU Active CN221158952U (en) | 2023-11-22 | 2023-11-22 | Constant-current charging type energy storage resistance welder system circuit |
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- 2023-11-22 CN CN202323154355.XU patent/CN221158952U/en active Active
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