CN214640896U - Power supply no-load voltage calibration device - Google Patents
Power supply no-load voltage calibration device Download PDFInfo
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- CN214640896U CN214640896U CN202022984627.9U CN202022984627U CN214640896U CN 214640896 U CN214640896 U CN 214640896U CN 202022984627 U CN202022984627 U CN 202022984627U CN 214640896 U CN214640896 U CN 214640896U
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Abstract
The utility model provides a power no-load voltage's calibrating device belongs to calibration equipment technical field. The calibration device comprises a conversion switch, a peak voltage test circuit and a voltmeter; the first gear end of the transfer switch is electrically connected with a voltage port of the peak voltage test circuit, and the voltage port is a voltage output port of a calibration port of the peak voltage test circuit after passing through the peak voltage test circuit; the second gear end of the change-over switch is electrically connected with one end of the voltmeter; the other calibration port of the peak voltage test circuit is also electrically connected with the other end of the voltmeter; the transfer switch is also provided with one calibration port of the voltmeter, and the other end of the voltmeter is also electrically connected with the other calibration port of the voltmeter. This application can effectively improve this calibrating device's calibration security and the convenience of tracing to the source.
Description
Technical Field
The utility model relates to a calibration equipment technical field particularly, relates to a power no-load voltage's calibrating device.
Background
The electric welding machine is widely applied to industrial fields of industrial mines, machinery, nuclear power and the like, and is indispensable equipment for industrial production. The welding power supply is an important component of the electric welding machine and is an energy source of the electric welding machine, the no-load voltage of the welding power supply is critical to the safe operation and the welding quality of the electric welding machine, and the calibration accuracy of the no-load voltage is very important.
Among the prior art, when calibration welding power supply no-load voltage, can only measure through setting up naked calibration circuit and through the voltmeter, the calibration is dangerous high, and the effective source tracing of the realization calibrating device that can't be convenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power no-load voltage's calibrating device can effectively improve this calibrating device's calibration security and convenience of tracing to the source.
The embodiment of the utility model is realized like this:
the embodiment of the utility model provides a power no-load voltage's calibrating device, include: the device comprises a transfer switch, a peak voltage test circuit and a voltmeter; the first gear end of the transfer switch is electrically connected with a voltage port of the peak voltage test circuit, and the voltage port is a voltage output port of a calibration port of the peak voltage test circuit after passing through the peak voltage test circuit; the second gear end of the change-over switch is electrically connected with one end of the voltmeter; the other calibration port of the peak voltage test circuit is also electrically connected with the other end of the voltmeter; the transfer switch is also provided with one calibration port of the voltmeter, and the other end of the voltmeter is also electrically connected with the other calibration port of the voltmeter.
Optionally, two ends of each target component having a numerical index in the peak voltage test circuit are electrically connected to a circuit breaker respectively, and two ends of each target component are also electrically connected to two calibration ports of each target component respectively.
Optionally, the peak voltage test circuit comprises: the circuit comprises a first resistor, a second resistor, a sliding rheostat, a diode and two capacitors; after the first resistor and the sliding rheostat are connected in series, the first resistor and the sliding rheostat are electrically connected between two calibration ports of a peak voltage test circuit; one calibration circuit of the peak voltage test circuit is electrically connected with one end of a second resistor, and the other end of the second resistor is electrically connected with the other calibration circuit of the peak voltage test circuit through a capacitor; the other end of the second resistor is also electrically connected with the anode of the diode, and the cathode of the diode is electrically connected with the other calibration circuit of the peak voltage test circuit through the other capacitor; the voltage port is the cathode of the diode; each target component is any one of a first resistor, a second resistor, a slide rheostat and two capacitors.
Optionally, the voltmeter is an ac/dc voltmeter; the calibration device further comprises: an effective value voltage test circuit; the third gear end of the change-over switch is electrically connected with a calibration port of the effective value voltage test circuit; the other end of the voltmeter is also electrically connected with the other calibration port of the effective value voltage test circuit.
Optionally, two ends of each component in the effective value voltage test circuit are electrically connected to a circuit breaker respectively, and two ends of each component are also electrically connected to two calibration ports of each component respectively.
Optionally, the significant value voltage test circuit includes: and the third resistor is electrically connected between the two calibration ports of the effective value voltage test circuit.
Optionally, the calibration device further comprises: the display device comprises a shell, a display screen and a display screen, wherein a panel is arranged on the shell and is provided with a display window; the peak voltage testing circuit, the voltmeter and the effective value voltage testing circuit are all arranged in the shell, wherein the voltmeter is arranged at a position corresponding to the display window in the shell, so that the display window displays detection data of the voltmeter.
Optionally, the calibration port of the peak voltage test circuit, the calibration port of the voltmeter, the calibration port of the effective value voltage test circuit, and the shift operation end of the change-over switch are all disposed on the panel.
Optionally, the circuit breakers connected to both ends of each target component in the peak voltage test circuit and the circuit breakers connected to both ends of each component in the effective value voltage test circuit are both disposed on the panel.
Optionally, the calibration port of each target component in the peak voltage test circuit and the calibration port of each component in the significant value voltage test circuit are both disposed on the panel.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides a calibration device of power no-load voltage, the first fender position end electricity of change over switch in this calibration device connects a voltage port of peak voltage test circuit, wherein, this voltage port is the voltage output port behind peak voltage test circuit for a calibration port of peak voltage test circuit, the second fender position end electricity of this change over switch connects one end of voltmeter, another calibration port of this peak voltage test circuit still electricity connects the other end of voltmeter; the transfer switch is also provided with one calibration port of the voltmeter, and the other end of the voltmeter is also electrically connected with the other calibration port of the voltmeter. By adopting the power supply no-load voltage calibration device provided by the embodiment of the application, the voltmeter is enabled to detect the voltage value between the voltage output port in the peak voltage test circuit loop and the other calibration port of the peak voltage test circuit by connecting the first gear end of the change-over switch with one voltage port of the peak voltage test circuit, the calibration of the two calibration ports of the peak voltage test circuit is realized, the change-over switch is controlled to be switched to the second gear, the second gear of the change-over switch is electrically connected with one end of the voltmeter, the voltmeter is disconnected with the voltage port of the peak voltage test circuit, namely, the voltmeter is in an open circuit state, so that the precision value of the voltmeter can be calibrated, the regular calibration of the voltmeter can be realized by an external standard, the accuracy and source tracing of the voltmeter can be guaranteed, and the calibration of the precision of the voltmeter can be realized, need not to dismantle the voltmeter from peak voltage test circuit and get off carrying out the calibration of voltmeter self precision, both guaranteed this calibrating device's calibration demand, can realize the calibration of voltmeter self precision again, calibration process convenient and fast has effectively improved this calibrating device's calibration security and the convenience of tracing to the source.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a calibration apparatus for a power supply no-load voltage according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a calibration apparatus for a no-load voltage of a power supply according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a housing according to an embodiment of the present invention.
Icon: 100-a calibration device; 10-a circuit breaker; 11-a first resistance breaker; 12 a second resistance breaker; 13-a third resistance breaker; 14-a fourth resistance breaker; 15-a fifth resistance breaker; 16 a-a first capacitive breaker; 16 b-a second capacitive breaker; 17 a-a third capacitive breaker; 17 b-a fourth capacitive breaker; 18 a-first active value breaker; 18 b-a second active value breaker; 110-peak voltage test circuit; 111-voltage port; 112-a first resistance; 113-a sliding varistor; 114-a second resistance; 115-one capacitor; 116-a diode; 117-another capacitance; 120-a voltmeter; 130-a transfer switch; 140-a significant value voltage test circuit; 141-third resistance; 200-a housing; 210-a panel; 211-a display window; 213-gear operating end; 221-calibration port of peak voltage test circuit; 222 — calibration port of voltmeter; 223-a calibration port of the significant value voltage test circuit; 231-a first resistance calibration port; 232-sliding varistor calibration port; 233-a second resistance calibration port; 234-one capacitance calibration port; 235-another capacitive calibration port; 236-third resistance calibration port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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 present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is one of the schematic structural diagrams of the calibration apparatus 100 for power supply no-load voltage provided by the present invention, please refer to fig. 1, an embodiment of the present invention provides a calibration apparatus 100 for power supply no-load voltage, including: a transfer switch 130, a peak voltage test circuit 110 and a voltmeter 120; the first gear end of the transfer switch 130 is electrically connected to a voltage port 111 of the peak voltage test circuit 110, and the voltage port 111 is a voltage output port of a calibration port of the peak voltage test circuit 110 after passing through the peak voltage test circuit 110; the second blocking terminal of the switch 130 is electrically connected to one terminal of the voltmeter 120; the other calibration port of the peak voltage test circuit 110 is also electrically connected to the other end of the voltmeter 120; the switch 130 also has one calibration port of the voltmeter 120, and the other end of the voltmeter 120 is also electrically connected to the other calibration port of the voltmeter 120.
In the embodiment of the present invention, the switch 130 is a switch having at least two shift ends, and is a switch device for switching two or more paths of power or load. In the present embodiment, the circuit is switched on or off, that is, one voltage port 111 of the peak voltage testing circuit 110 is switched on or off by the first gear terminal, and one end of the voltmeter 120 is switched on or off by the second gear terminal. In addition, the switch 130 may not be limited to the two shift ends, and may have other shift ends, for example, the calibration device may have other circuit ports, and in this case, the other shift ends of the switch 130 are connected to or disconnected from the other circuit ports.
The peak voltage test circuit 110 is a test circuit for a peak voltage of the welding machine during idle operation, where the idle voltage is a voltage between output ends of the welding power supply when an external welding loop is open, that is, a voltage value between a voltage output port in the loop of the peak voltage test circuit 110 and another calibration port of the peak voltage test circuit 110 in this embodiment.
The voltmeter 120 is used for detecting a voltage value between the voltage output port in the loop of the peak voltage test circuit 110 and another calibration port of the peak voltage test circuit 110. It can be a DC voltmeter or an AC/DC voltmeter. The peak voltage test circuit 110 can be used to calibrate the no-load voltage of a dc welding power supply, which is a dc welder welding power supply or an ac/dc welder welding power supply with dc characteristics. To facilitate calibration detection of the no-load voltage of the dc welding power supply by the peak voltage test circuit 110, the peak voltage detected by the peak voltage test circuit may be detected by a voltmeter connected to the peak voltage test circuit 110. The voltmeter 120 may be a voltmeter having a function of detecting a dc voltage, and may be a dc voltmeter or an ac/dc voltmeter.
The embodiment of the utility model provides an in, peak value when two calibration ports through peak voltage test circuit 110 can realize the no-load voltage to DC welding machine's welding power supply calibrates, two calibration ports through voltmeter 120 can realize calibrating voltmeter self precision, that is to say, calibrating device in this embodiment can calibrate the peak voltage when welding power supply is no-load, can provide the calibration port for the precision of calibrating voltmeter 120 self again, the convenience that calibrating device traced to the source has both been ensured effectively, the safety in utilization of electric welding has effectively been guaranteed again.
The voltage port 111 is a voltage output port of the peak voltage testing circuit 110 after a calibration port of the peak voltage testing circuit 110 passes through the peak voltage testing circuit 110. The peak voltage test circuit 110 has two calibration ports, one of which is the voltage port 111 after passing through the peak voltage test circuit 110, and the other of which is not required to pass through the peak voltage test circuit 110, that is, the other of which is at the same potential as the voltage output port.
When the peak voltage test circuit 110 calibrates the peak value of the no-load voltage of the welding power supply of the electric welding machine, the transfer switch 130 is controlled at the first gear end, so that the first gear end of the transfer switch 130 is electrically connected to the voltage port 111, so that two ends of the voltmeter 120 are electrically connected to the voltage port 111 and another calibration port of the peak voltage test circuit 110, respectively, that is, the voltmeter 120 is used to display the voltage value between the voltage output port in the loop of the peak voltage test circuit 110 and another calibration port of the peak voltage test circuit 110.
When the voltmeter 120 needs to be calibrated, the transfer switch 130 is controlled to be switched from the first gear end to the second gear end, so that one end of the voltmeter 120 is disconnected from the voltage port of the peak voltage test circuit 110, and the other end of the voltmeter 120 is connected with the other calibration port of the voltmeter 120, at this time, the voltmeter 120 is in an open circuit state, and the voltmeter 120 can be regularly calibrated through an external standard, thereby ensuring the accuracy and traceability of the voltmeter 120. Therefore, when the accuracy of the voltmeter 120 is calibrated, the voltmeter 120 does not need to be detached from the peak voltage test circuit 110, and the accuracy of the voltmeter 120 is calibrated by selecting the gear of the change-over switch 130.
As can be seen from the above, when the first gear end of the transfer switch is connected to the voltage port 111 of the peak voltage testing circuit 110, the voltmeter 120 is connected to the voltage port 111 of the peak voltage testing circuit 110, and the voltmeter 120 is configured to display the calibration voltage, so as to complete the calibration of the no-load voltage peak of the welding power supply of the welding machine. When the change-over switch is switched from the first gear end to the second gear end, the voltmeter 120 is disconnected from the voltage port 111 of the peak voltage testing circuit 110, and the accuracy of the voltmeter 120 is calibrated, so that the calibration process of the calibration device is convenient and fast, and the calibration safety and the traceability convenience of the calibration device are improved.
The utility model provides a calibrating device 100 of power no-load voltage, accessible change over switch 130 first gear end is connected with a voltage port 111 of peak voltage test circuit 110, make voltmeter 120 detect the voltage value between voltage output port in the peak voltage test circuit 110 return circuit and another calibration port of peak voltage test circuit 110, realize the calibration to two calibration ports of peak voltage test circuit, and then switch over to its second gear end through control change over switch, make the second gear end of change over switch 130 be connected with one end electricity of voltmeter 120, make voltmeter 120 and the disconnection of voltage port 111 of peak voltage test circuit 110, namely, make voltmeter 120 be in the open circuit state, thereby can calibrate the precision value of voltmeter 120 self, can realize the calibration to voltmeter 120 through external etalon regularly, the degree of accuracy and the traceability of voltmeter 120, the voltmeter 120 does not need to be detached from the peak voltage test circuit 110 to calibrate the accuracy of the voltmeter 120, the calibration requirement of the calibration device is guaranteed, the calibration of the accuracy of the voltmeter can be realized, the calibration process is convenient and fast, and the calibration safety of the calibration device is effectively improved.
Optionally, two ends of each target component having a numerical index in the peak voltage test circuit 110 are electrically connected to one circuit breaker 10, and two ends of each target component are also electrically connected to two calibration ports of each target component.
Specifically, two ends of each target component having a numerical index in the peak voltage test circuit 110 are electrically connected to one circuit breaker 10, respectively. The circuit breaker 10 is configured to, when any one target component having a numerical index in the peak voltage test circuit 110 is calibrated, disconnect the circuit breaker 10 at both ends of any one target component having a numerical index in the peak voltage test circuit 110, so that the target component is cut out from the calibrated peak voltage test circuit 110. That is, the two ends of the corresponding target component between the two circuit breakers 10 are respectively in an open state, and thus, the target component is precisely calibrated at the calibration port electrically connected through the two ends of the target component. It can be seen from the above that, when each target component having a numerical index in the peak voltage test circuit 110 is subjected to precision calibration, the corresponding target component does not need to be detached from the peak voltage test circuit 110, the circuit breaker 10 cuts off the electrical connection state of the two ends of the corresponding target component, so that the corresponding target component can be cut out from the peak voltage test circuit 110, and then the precision calibration is performed on the target component through the calibration ports at the two ends of the corresponding target component, thereby realizing the calibration of each target component in the peak voltage test circuit, ensuring the traceability of each target component in the peak voltage test circuit, and effectively improving the calibration safety of the calibration device.
Referring to fig. 1, optionally, the peak voltage test circuit 110 includes: a first resistor 112, a second resistor 114, a sliding varistor 113, a diode 116, and two capacitors; wherein the first resistor 112 and the sliding rheostat 113 are electrically connected between the two calibration ports of the peak voltage test circuit 110 after being connected in series; one calibration circuit of the peak voltage test circuit 110 is electrically connected to one end of the second resistor 114, and the other end of the second resistor 114 is electrically connected to the other calibration circuit of the peak voltage test circuit 110 through a capacitor 115; the other end of the second resistor 114 is further electrically connected to the anode of a diode 116, and the cathode of the diode 116 is electrically connected to another calibration circuit of the peak voltage test circuit 110 through another capacitor 117; voltage port 111 is the cathode of diode 116; each target component is any one of the first resistor 112, the second resistor 114, the sliding rheostat 113 and the two capacitors.
Illustratively, the resistance of the first resistor 112 is 0.2 kilo-ohm, the resistance of the second resistor 114 is 1 kilo-ohm, and the sliding variable resistance range of the sliding variable resistor 113 is 0-5 kilo-ohm, which is only for illustrating the resistances of the first resistor 112, the second resistor 114 and the sliding variable resistor 113, and is not understood as a limitation on the resistances of the first resistor 112, the second resistor 114 and the sliding variable resistor 113, wherein the resistances of the first resistor 112 and the second resistor 114 are fixed values.
The diode 116 is a device having two electrodes and allows a current to flow in only a single direction, and the diode 116 in this embodiment is used to conduct a current in a single direction, that is, a rectifying function of the diode 116 is applied, where the rectifying function refers to a current directivity possessed by the diode 116. The two electrodes of the diode 116 are respectively an anode and a cathode, in this embodiment, the anode of the diode 116 is electrically connected to the second resistor 114 and the capacitor 115, and the cathode of the diode 116 is electrically connected to the first gear terminal and the second capacitor of the switch 130, respectively, wherein the cathode of the diode 116 is the voltage port 111.
Two capacitors are used for filtering in this embodiment, wherein the capacitance of the capacitor is a fixed value, but the magnitude of the capacitance is not limited.
As can be seen from the above, two ends of each target component having a numerical index in the peak voltage test circuit 110 are electrically connected to one circuit breaker 10, and two ends of each target component are also electrically connected to two calibration ports of each target component.
Specifically, referring to fig. 1 again, in this embodiment, the target components in the peak voltage testing circuit 110 include a first resistor 112, a second resistor 114, a sliding rheostat 113 and two capacitors, two ends of the first resistor 112 are electrically connected to the third resistor breaker 13 and the second resistor 114 breaker 10 respectively, two ends of the sliding rheostat 113 are electrically connected to the second resistor 114 breaker 10 and the first resistor breaker 11 respectively, two ends of the second resistor 114 are electrically connected to the fourth resistor breaker 14 and the fifth resistor breaker 15 respectively, two ends of one capacitor 115 are electrically connected to the first capacitor breaker 16a and the second capacitor breaker 16b respectively, and two ends of the other capacitor 117 are electrically connected to the third capacitor breaker 17a and the fourth capacitor breaker 17b respectively.
Referring to fig. 2, optionally, the voltmeter 120 may be an ac/dc voltmeter 120; the calibration device 100 further comprises: a significant value voltage test circuit 140; the third gear end of the change-over switch 130 is electrically connected with a calibration port of the effective value voltage test circuit 140; the other end of the voltmeter 120 is also electrically connected to another calibration port of the effective value voltage test circuit 140.
The calibration of the effective value voltage of the welding power supply of the alternating current welding machine in no load can be realized through the effective value voltage test circuit 140.
In order to facilitate the calibration and detection of the effective value voltage test circuit 140 for the no-load voltage of the ac welding power source or the welding power source with ac characteristics of the ac/dc welding machine, the effective value voltage detected by the effective value voltage test circuit 140 may be detected by a voltmeter connected to the effective value voltage test circuit 140.
If the voltmeter 120 is an ac/dc voltmeter, the calibration device can calibrate the no-load voltage of the welding power supply of the ac welding machine. The size of the ac/dc voltmeter is determined by the specification of the ac/dc power supply or the ac power supply, and for example, if the peak value of the ac power supply is 20V, the voltage detection range of the ac/dc voltmeter is 0 to 20V.
It should be noted that the calibration apparatus shown in fig. 1 and fig. 2 is only a possible implementation example, and in other possible implementation manners, in fig. 1 and fig. 2, the internal circuit structures of the peak voltage test circuit and the effective value voltage test circuit may also be other structures, which is not limited by the embodiment of the present invention.
In this embodiment, the transfer switch 130 has a first gear end, a second gear end and a third gear end, when the transfer switch 130 is at the first gear end, the transfer switch 130 is electrically connected to one voltage port 111 of the peak voltage testing circuit 110, and the ac/dc voltmeter displays the peak voltage of the welding machine when the power supply is idle. When the switch 130 is at the second-gear end, the ac/dc voltmeter is in an open-circuit state, and is used for calibrating the accuracy of the ac/dc voltmeter itself. When the change-over switch 130 is at the third gear end, the change-over switch 130 is electrically connected to a calibration port of the effective value voltage testing circuit 140, and the ac/dc voltmeter is used for displaying the effective value of the welding machine when the power supply is idle. Therefore, the calibrating device in the embodiment can realize the switching of the voltage calibrating circuits when different welding power supplies are in no-load, realize the function combination and realize the one-key switching, and is convenient and quick.
The effective value voltage test circuit 140 is used for calibrating an effective value of the welding machine when the power supply is idle, wherein the effective value is specified according to the current thermal effect, an alternating current and a direct current respectively pass through resistors with the same resistance, and if the heat generated in the same time is equal, the value of the direct current is called as the effective value of the alternating current.
Optionally, two ends of each component in the effective value voltage test circuit 140 are electrically connected to one circuit breaker 10, and two ends of each component are also electrically connected to two calibration ports of each component.
Specifically, two ends of each component in the effective value voltage test circuit are electrically connected to one circuit breaker 10 respectively. The circuit breaker 10 is configured to disconnect the circuit breaker 10 at both ends of any one component in the significant value voltage test circuit 140 when the component in the significant value voltage test circuit 140 is calibrated, so that the component is cut out from the calibrated significant value voltage test circuit 140. That is to say, let the both ends of the corresponding components and parts between two circuit breakers 10 be in open circuit state respectively, like this, the calibration port that again through this components and parts both ends electricity is connected carries out the precision calibration to it. It can be seen from the above that, when each component in the effective value voltage test circuit 140 is subjected to precision calibration, the corresponding component does not need to be detached from the effective value voltage test circuit 140, the circuit breaker 10 cuts off the electrical connection state of the two ends of the corresponding component, so that the corresponding component can be cut out from the effective value voltage test circuit 140, and then the component is subjected to precision calibration through the calibration ports at the two ends of the corresponding component, thereby realizing the calibration of each component in the effective value voltage test circuit 140, ensuring the traceability of each component, and effectively improving the calibration safety of the calibration device.
Alternatively, the significant-value voltage test circuit 140 includes: and the third resistor 141, the third resistor 141 is electrically connected between the two calibration ports of the effective value voltage test circuit.
The resistance of the third resistor 141 is a constant value resistor, and the magnitude of the resistance is not limited, for example, the resistance of the third resistor 141 is 5 kilo-ohms, it should be understood that the above is only an example, and the magnitude of the resistance of the third resistor 141 is not limited.
Referring to fig. 2, it can be seen that two ends of each component in the effective value voltage test circuit 140 are electrically connected to one breaker 10, the component in the effective value voltage test circuit is a third resistor 141, and two ends of the third resistor 141 are electrically connected to the first effective value breaker 18a and the second effective value breaker 18b, respectively.
Optionally, the calibration device 100 further comprises: a housing 200, a panel 210 is arranged on the housing 200, and a display window 211 is arranged on the panel 210; the peak voltage test circuit 110, the voltmeter 120 and the effective value voltage test circuit 140 are all arranged in the housing 200, wherein the voltmeter 120 is arranged at a position corresponding to the display window 211 in the housing 200, so that the display window 211 displays the detection data of the voltmeter 120.
Specifically, the casing 200 is hollow and has an opening facing the peak voltage test circuit 110, the voltmeter 120 and the effective value voltage test circuit 140, and the casing 200 is buckled on the peak voltage test circuit 110, the voltmeter 120 and the effective value voltage test circuit 140, so that the peak voltage test circuit 110, the voltmeter 120 and the effective value voltage test circuit 140 are all located in the casing 200, the naked peak voltage test circuit 110 and the naked effective value voltage test circuit 140 are protected, an operator is prevented from mistakenly touching, and the safety of the calibration device 100 is further improved.
As can be seen from the above discussion, when calibrating the accuracy of the voltmeter 120 in the calibration apparatus 100, the voltmeter 120 does not need to be detached from the calibration circuit (the peak voltage test circuit 110 and the effective value voltage test circuit 140) of the calibration apparatus 100, therefore, a display window 211 is disposed on the housing 200, and is used for displaying the accuracy of the display itself when the accuracy of the voltmeter 120 is calibrated, and displaying the magnitudes of the corresponding peak value and the effective value when the calibration circuit tests the peak value and the effective value when the welding machine power supply is unloaded, so as to conveniently and quickly complete the calibration of different voltages of the welding machine power supply and the calibration of the accuracy of the voltmeter itself.
That is to say, the voltmeter 120 is embedded in the housing 200, the first gear end is electrically connected with the voltage port by controlling the change-over switch, the calibration of the peak voltage of the welding power supply of the electric welding machine during no-load is realized, the second gear end is disconnected with the voltage port by controlling the change-over switch, one end of the voltmeter is in an open circuit state, the calibration of the self-precision of the voltmeter is realized, the third gear end is electrically connected with one calibration port of the effective value voltage test circuit by controlling the change-over switch, the calibration of the effective value voltage of the welding power supply of the electric welding machine during no-load is realized, the calibration of the voltage of different welding power supplies during no-load can be realized, the calibration of the self-precision of the voltmeter can also be realized, and the operation is convenient and fast.
Optionally, a calibration port 221 of the peak voltage test circuit, a calibration port 222 of the voltmeter, a calibration port 223 of the effective value voltage test circuit, and a gear operating end 213 of the transfer switch 130 are disposed on the panel 210.
Specifically, referring to fig. 3, the gear operating end 213 of the transfer switch 130 is controlled to enable the transfer switch 130 to be selectively electrically connected to the peak voltage testing circuit 110, the voltmeter 120 and the effective value voltage testing circuit 140, when the transfer switch 130 is at the first gear end, the calibration device 100 is configured to calibrate the precision of the voltage peak value of the welding machine power supply in no-load state, when the transfer switch 130 is at the second gear end, the calibration device 100 is configured to calibrate the precision of the voltmeter 120 itself, and when the transfer switch 130 is at the third gear end, the calibration device 100 is configured to calibrate the precision of the effective value of the welding machine power supply in no-load state, so that the calibration process is convenient and fast.
Alternatively, the circuit breaker 10 connected to both ends of each target component in the peak voltage test circuit 110 and the circuit breaker 10 connected to both ends of each component in the significant value voltage test circuit 140 are disposed on the panel 210.
Referring to fig. 2 and 3, a first resistor chopper 11, a second resistor chopper 114, a third resistor chopper 13, a fourth resistor chopper 14, a fifth resistor chopper 15, a first capacitor chopper 16a, a second capacitor chopper 16b, a third capacitor chopper 17a, a fourth capacitor chopper 17b, a first effective value chopper 18a, and a second effective value chopper 18b are disposed on the panel 210.
Optionally, a calibration port of each target component in the peak voltage test circuit 110 and a calibration port of each component in the significant value voltage test circuit 140 are disposed on the panel 210.
Specifically, referring to fig. 2 and fig. 3, the calibration port corresponding to the first resistor 112 is a first resistor calibration port 231, the calibration port corresponding to the sliding resistor 113 is a sliding resistor calibration port 232, the calibration port corresponding to the second resistor 114 is a second resistor calibration port 233, the calibration port corresponding to one capacitor 115 is a capacitor calibration port 234, the calibration port corresponding to the other capacitor 117 is another capacitor calibration port 235, and the calibration port corresponding to the third resistor 141 is a third resistor calibration port 236.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A calibration apparatus for a no-load voltage of a power supply, comprising: the device comprises a transfer switch, a peak voltage test circuit and a voltmeter;
the first gear end of the change-over switch is electrically connected with a voltage port of the peak voltage test circuit, and the voltage port is a voltage output port of a calibration port of the peak voltage test circuit after passing through the peak voltage test circuit; the second gear end of the change-over switch is electrically connected with one end of the voltmeter; the other calibration port of the peak voltage test circuit is also electrically connected with the other end of the voltmeter;
the change-over switch is also provided with one calibration port of the voltmeter, and the other end of the voltmeter is also electrically connected with the other calibration port of the voltmeter.
2. The calibration device according to claim 1, wherein two ends of each target component having a numerical index in the peak voltage test circuit are electrically connected with a circuit breaker respectively, and two ends of each target component are also electrically connected with two calibration ports of each target component respectively.
3. The calibration device of claim 2, wherein the peak voltage test circuit comprises: the circuit comprises a first resistor, a second resistor, a sliding rheostat, a diode and two capacitors;
wherein the first resistor and the sliding rheostat are electrically connected between two calibration ports of the peak voltage test circuit after being connected in series; one calibration circuit of the peak voltage test circuit is electrically connected with one end of the second resistor, and the other end of the second resistor is electrically connected with the other calibration circuit of the peak voltage test circuit through a capacitor; the other end of the second resistor is also electrically connected with the anode of the diode, and the cathode of the diode is electrically connected with another calibration circuit of the peak voltage test circuit through another capacitor;
the voltage port is the cathode of the diode; each target component is any one of the first resistor, the second resistor, the sliding rheostat and the two capacitors.
4. The calibration device of claim 2, wherein the voltmeter is an ac/dc voltmeter; the calibration device further comprises: an effective value voltage test circuit;
a third gear end of the change-over switch is electrically connected with one calibration port of the effective value voltage test circuit; the other end of the voltmeter is also electrically connected with the other calibration port of the effective value voltage test circuit.
5. The calibration device according to claim 4, wherein two ends of each component in the effective value voltage test circuit are electrically connected with a circuit breaker respectively, and two ends of each component are also electrically connected with two calibration ports of each component respectively.
6. The calibration device of claim 5, wherein the virtual value voltage test circuit comprises: and the third resistor is electrically connected between the two calibration ports of the effective value voltage test circuit.
7. The calibration device of claim 5, further comprising: the display device comprises a shell, a display screen and a display screen, wherein a panel is arranged on the shell and is provided with a display window;
the peak voltage testing circuit, the voltmeter and the effective value voltage testing circuit are all arranged in the shell, wherein the voltmeter is arranged at a position in the shell corresponding to the display window, so that the display window displays detection data of the voltmeter.
8. The calibration device of claim 7, wherein a calibration port of the peak voltage test circuit, a calibration port of the voltmeter, a calibration port of the virtual value voltage test circuit, and a gear operating end of the transfer switch are disposed on the panel.
9. The calibration device according to claim 7, wherein the circuit breaker connected to both ends of each of the target components in the peak voltage test circuit and the circuit breaker connected to both ends of each of the components in the effective value voltage test circuit are provided on the panel.
10. The calibration device according to claim 7, wherein the calibration port of each of the target components in the peak voltage test circuit and the calibration port of each of the components in the significant voltage test circuit are provided on the panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022984627.9U CN214640896U (en) | 2020-12-11 | 2020-12-11 | Power supply no-load voltage calibration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022984627.9U CN214640896U (en) | 2020-12-11 | 2020-12-11 | Power supply no-load voltage calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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2020
- 2020-12-11 CN CN202022984627.9U patent/CN214640896U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
| CN116754986B (en) * | 2023-08-10 | 2023-11-07 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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