CN219659580U - Frequency converter charging circuit and device - Google Patents
Frequency converter charging circuit and device Download PDFInfo
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- CN219659580U CN219659580U CN202321270400.5U CN202321270400U CN219659580U CN 219659580 U CN219659580 U CN 219659580U CN 202321270400 U CN202321270400 U CN 202321270400U CN 219659580 U CN219659580 U CN 219659580U
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Abstract
The utility model discloses a frequency converter charging circuit and a device, which relate to the technical field of charging equipment, wherein the charging circuit comprises: the first change-over switch can be manually controlled and automatically controlled to be mutually switched, and one end of the first change-over switch is connected with a power supply; the device comprises a stop button and a start button, wherein the stop button is in a normally closed state, one end of the stop button is connected with one end of the start button, and the other end of the stop button is connected with the other end of the first change-over switch; the control end one end of main relay connects the other end of start button, and main relay's control end other end ground connection, and main relay's first controlled end one end is connected the commercial power, and main relay's first controlled end other end is connected the input of transformer, and the transformer ground connection, the input of rectifier bridge is connected to the output of transformer, and the output of rectifier bridge exports direct current charging source.
Description
Technical Field
The utility model relates to the technical field of charging equipment, in particular to a frequency converter charging circuit and a device.
Background
The AC-DC-AC frequency transmission system is widely applied to industrial production activities, and the general form is that an AC inlet wire is connected with a DC busbar through a common rectifier output DC power supply, the DC busbar carries each DC-AC frequency converter, and the frequency converter outputs an AC power supply to drive a motor.
In the prior art, a pre-charging circuit is arranged in a rectifier, the pre-charging circuit charges capacitors at a rectifying side and an inversion side in the power-on process of the system, and after the direct current voltage slowly rises to a safe range, the internal pre-charging circuit is disconnected and then the power transmission of a main loop switch system is completed. This is because the internal capacitance does not accumulate charge before the frequency converter is powered, and the impact of transient current at the moment of power delivery can cause the damage of fast melting or other components in the circuit. Therefore, even if only one frequency converter needs to independently transmit power, the power interruption and transmission process of the primary rectifier is also executed, which is very unfavorable for the continuous operation of the production line, and the working efficiency is greatly reduced. In addition, due to the design of the pure manual control in the prior art, the working time of workers is increased, and the working efficiency is reduced.
Disclosure of Invention
The utility model aims to provide a frequency converter charging circuit and a device, wherein a first change-over switch is arranged to be capable of being manually controlled and automatically controlled to be mutually switched.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an aspect of an embodiment of the present utility model provides a charging circuit for a frequency converter, including: the first change-over switch can be manually controlled and automatically controlled to be mutually switched, and one end of the first change-over switch is connected with a power supply; the device comprises a stop button and a start button, wherein the stop button is in a normally closed state, one end of the stop button is connected with one end of the start button, and the other end of the stop button is connected with the other end of the first change-over switch; the control end one end of main relay is connected the other end of start button, the other end ground connection of control end of main relay, the mains supply is connected to main relay's first controlled end one end, the input of transformer is connected to main relay's first controlled end other end, the transformer ground connection, the output of transformer is connected the input of rectifier bridge, the output of rectifier bridge exports direct current charging source.
In some embodiments, the charging circuit further includes a current limiting resistor, and the positive output end of the rectifier bridge is connected to the current limiting resistor.
In some embodiments, the charging circuit further comprises a dc voltmeter connected in parallel with the output of the rectifier bridge.
In some embodiments, the charging circuit further includes an ac voltmeter connected in parallel with one end of the first controlled end of the main relay.
In some embodiments, the charging circuit further includes a main switch, one end of the main switch is connected to the mains, and the other end of the main switch is connected to one end of the first controlled end of the main relay.
In some embodiments, the charging circuit further includes a fuse, and the other end of the main switch is connected to one end of the first controlled end of the main relay through the fuse.
In some embodiments, the charging circuit further includes a first relay, one end of a control end of the first relay is connected to the other end of the start button, the other end of the control end of the first relay is grounded, a first controlled end of the first relay is connected in parallel with the start button for self-locking after the first relay is electrified, one end of a second controlled end of the first relay is connected to one end of the start button, and the other end of the second controlled end of the first relay is connected to one end of the control end of the main relay.
In some embodiments, the charging circuit further includes a voice module, a second transfer switch, a second relay, a third relay, a first automatic switch and a second automatic switch, where the second transfer switch is capable of being manually controlled and automatically controlled to switch between each other, the voice module includes a first prompt module, a second prompt module and a third prompt module, a power input end of the voice module is connected to a power supply, one end of the second transfer switch is connected to one end of the second automatic switch, the other end of the second automatic switch is connected to a control end of the first prompt module, and is used to control the first prompt module to operate, one end of a control end of the third relay is connected to the other end of the first transfer switch, the other end of a control end of the third relay is grounded, one end of a first controlled end of the third relay is connected to the other end of the first transfer switch, the first controlled end of the third relay is connected to the other end of the stop button, a second controlled end of the third relay is in a normally closed state, the third controlled end of the third relay is in a state, the second controlled end of the third relay is connected to the other end of the second relay is connected to the other end of the first controlled button, the second controlled end of the third relay is connected to the other end of the first controlled end of the third relay, and the other end of the third relay is connected to the other end of the first controlled end of the first relay, the second controlled end other end of the second relay is connected with the second controlled end one end of the main relay, the second controlled end other end of the main relay is connected with the control end of the third prompt module so as to control the third prompt module to work, the second controlled end of the main relay is in a normally closed state, the third controlled end one end of the first relay is connected with one end of the starting button, the third controlled end other end of the first relay is connected with the third controlled end one end of the main relay, and the third controlled end other end of the main relay is connected with the control end of the second prompt module so as to control the second prompt module to work.
In some embodiments, the charging circuit further includes a charging lamp, one end of the charging lamp is connected to the other end of the third controlled end of the main relay, and the other end of the charging lamp is grounded, so as to be used for prompting the charging state.
An aspect of an embodiment of the present utility model provides a charging device for a frequency converter, including a charging circuit as described above.
According to the frequency converter charging circuit and the frequency converter charging device, the frequency converter charging circuit and the frequency converter charging device have at least the following beneficial effects: the first transfer switch is arranged to be capable of being manually controlled and automatically controlled to be switched. The effect of safe charging is achieved through the current limitation of the current limiting resistor. The voltage values of direct current and alternating current can be observed through the direct current voltmeter and the alternating current voltmeter. The fuse can prevent the internal electronic components from being burnt out by overvoltage. The charging light may indicate a state of charge.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a charging circuit of a frequency converter according to an embodiment.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
The following is a brief description of the technical solution of the embodiment of the present utility model:
according to some embodiments, as shown in fig. 1, the present utility model provides a charging circuit for a frequency converter, the charging circuit comprising:
the first change-over switch can be manually controlled and automatically controlled to be mutually switched, and one end 23 of the first change-over switch is connected with a power supply;
a stop button OFF and a start button ON, wherein the stop button OFF is in a normally closed state, one end of the stop button OFF is connected with one end of the start button ON, and the other end of the stop button OFF is connected with the other end 24 of the first change-over switch;
main relay KA1, transformer and rectifier bridge, the control end one end of main relay KA1 is connected the other end of start button ON, main relay KA 1's control end other end ground connection, main relay KA 1's first controlled end one end is connected the commercial power, main relay KA 1's first controlled end other end is connected the input of transformer, the transformer ground connection, the output of transformer is connected the input of rectifier bridge, the output direct current charging power of rectifier bridge.
Based on the above embodiments, the control end of the first transfer switch is adjustable to a manual mode and an automatic mode. When the power supply is adjusted to be in a manual mode, the control end of the first change-over switch is manually operated to enable the first change-over switch to be closed, the start button ON is pressed, the main relay KA1 is in suction, the input end of the transformer inputs mains supply, the output end of the transformer outputs 480V alternating current after boosting, the rectifier bridge rectifies the 480V alternating current and outputs 650V direct current power, and the load is charged through the 650V direct current power. When the automatic mode is adjusted, a set electric quantity value for charging the load needs to be set. When charging is started, the first transfer switch is automatically closed, and the starting button ON is pressed to charge the load. When the load is charged to the set electric quantity value, the first transfer switch is automatically turned off, and the load stops charging. The intelligent and convenience of load charging are improved.
The preferred embodiments of the present disclosure are further elaborated below in conjunction with fig. 1 of the present specification.
According to some embodiments, the charging circuit further comprises a current limiting resistor, and the positive output end of the rectifier bridge is connected with the current limiting resistor.
Based on the above embodiment, the current limiting resistor adopts the sliding rheostat, the resistance value of the sliding rheostat is set according to the voltage and current which can be born by the load, and the current is limited through the sliding rheostat, so that the effect of safe charging is achieved.
According to some embodiments, the charging circuit further comprises a direct current voltmeter VDC, the direct current voltmeter VDC being connected in parallel with the output of the rectifier bridge.
Based on the above embodiments, the load charging voltage can be monitored in real time by observing the direct current voltmeter VDC. The magnitude of the charging voltage of the load can be adjusted by increasing or decreasing the resistance value of the sliding rheostat. When the charging voltage is too large or too small, the voltage adjustment can be accomplished by adjusting the slide rheostat and observing the voltage value of the direct current voltmeter VDC. The accuracy of the voltage regulation is improved.
According to some embodiments, the charging circuit further includes an ac voltmeter VAC, and the ac voltmeter VAC is connected in parallel with one end of the first controlled terminal of the main relay KA 1. For observing the stability of the alternating current at the input side in real time.
According to some embodiments, the charging circuit further includes a main switch Q1, one end of the main switch Q1 is connected to the mains, and the other end of the main switch Q1 is connected to one end of the first controlled end of the main relay KA 1.
Based on the above embodiment, the main switch Q1 is provided so that all power sources can be manually turned off in an emergency.
According to some embodiments, the charging circuit further includes a fuse FU, and the other end of the main switch Q1 is connected to one end of the first controlled end of the main relay KA1 through the fuse FU.
Based on the above embodiment, the fuse FU can prevent the internal electronic components from being burned out by the momentary high voltage.
According to some embodiments, the charging circuit further comprises a first relay K1, one end of a control end of the first relay K1 is connected with the other end of the start button ON, the other end of the control end of the first relay K1 is grounded, a first controlled end of the first relay K1 is connected with the start button ON in parallel so as to be used for self-locking after the first relay K1 is electrified, one end of a second controlled end of the first relay K1 is connected with one end of the start button ON, and the other end of the second controlled end of the first relay K1 is connected with one end of a control end of the main relay KA 1.
According to some embodiments, the charging circuit further comprises a voice module VRM, a second transfer switch, a second relay K2, a third relay K3, a first automatic switch VDC-AL1 and a second automatic switch VDC-AL2, the second transfer switch being capable of being manually controlled and automatically controlled to switch between each other, the voice module VRM comprises a first prompt module VRM1, a second prompt module VRM2 and a third prompt module VRM4, a power input terminal of the voice module VRM is connected to a power supply, one terminal 13 of the second transfer switch and one terminal of the second automatic switch VDC-AL2 are connected to the power supply, the other terminal of the second automatic switch VDC-AL2 is connected to a control terminal of the first prompt module VRM1 for controlling the operation of the first prompt module VRM1, one terminal of a control terminal of the third relay K3 is connected to the other terminal 24 of the first transfer switch, the other terminal of the third relay K3 is grounded, one end of a first controlled end of the third relay K3 is connected with the other end 24 of the first transfer switch, the other end of the first controlled end of the third relay K3 is connected with the other end of the stop button OFF, the second controlled end of the third relay K3 is in a normally closed state, one end of the second controlled end of the third relay K3 is connected with the other end 14 of the second transfer switch and the other end of the stop button OFF, the other end of the second controlled end of the third relay K3 is connected with one end of the first automatic switch VDC-AL1, the other end of the first automatic switch VDC-AL1 is grounded through the control end of the second relay K2, the first controlled end of the second relay K2 is in a normally closed state, the first controlled end of the second relay K2 is arranged between the stop button OFF and the start button ON, the second controlled end one end of the second relay K2 is connected with the other end 14 of the second transfer switch and the other end of the stop button OFF, the second controlled end other end of the second relay K2 is connected with the second controlled end one end of the main relay KA1, the second controlled end other end of the main relay KA1 is connected with the control end of the third prompt module VRM4 so as to be used for controlling the third prompt module VRM4 to work, the second controlled end of the main relay KA1 is in a normally closed state, the third controlled end one end of the first relay K1 is connected with the end of the start button ON, the third controlled end other end of the first relay K1 is connected with the third controlled end one end of the main relay KA1, and the third controlled end other end of the main relay KA1 is connected with the control end of the second prompt module VRM2 so as to be used for controlling the second prompt module VRM2 to work.
Based ON the above embodiment, when the first transfer switch and the second transfer switch are set to the automatic mode, after the first transfer switch is automatically closed, the second automatic switch VDC-AL2 is also automatically closed, the first controlled end (normally open end of the contactor) of the third relay K3 is closed, the first prompt module VRM1 works, and the next operation step is voice-prompted, for example, the voice prompt manually presses the start button ON. After the start button ON is pressed, the first relay K1 is attracted, the main relay KA1 is attracted, the input end of the transformer inputs commercial power, the output end of the transformer outputs 480V alternating current after boosting, the rectifier bridge rectifies the 480V alternating current and outputs 650V direct current power, and the load is charged through the 650V direct current power. During charging, the second prompt module VRM2 works, and the voice prompt is in charging. When the charging reaches the set electric quantity value, the first transfer switch is automatically opened, the second transfer switch and the first automatic switch VDC-AL1 are automatically closed, and the load stops charging. The control end of the second relay K2 is powered on, the second controlled end (normally open end of the contactor) of the second relay K2 is attracted, the third prompting module VRM4 works, and voice prompt charging is completed.
According to some embodiments, the charging circuit further includes a charging lamp, one end of the charging lamp is connected to the other end of the third controlled end of the main relay KA1, and the other end of the charging lamp is grounded, so as to be used for prompting the charging state.
According to some embodiments, the present utility model provides a frequency converter charging device comprising a charging circuit as described above.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A frequency converter charging circuit, the charging circuit comprising:
the first change-over switch can be manually controlled and automatically controlled to be mutually switched, and one end of the first change-over switch is connected with a power supply;
the device comprises a stop button and a start button, wherein the stop button is in a normally closed state, one end of the stop button is connected with one end of the start button, and the other end of the stop button is connected with the other end of the first change-over switch;
the control end one end of main relay is connected the other end of start button, the other end ground connection of control end of main relay, the mains supply is connected to main relay's first controlled end one end, the input of transformer is connected to main relay's first controlled end other end, the transformer ground connection, the output of transformer is connected the input of rectifier bridge, the output of rectifier bridge exports direct current charging source.
2. The charging circuit of claim 1, further comprising a current limiting resistor, wherein the positive output of the rectifier bridge is connected to the current limiting resistor.
3. The charging circuit of claim 1, further comprising a dc voltmeter connected in parallel with an output of the rectifier bridge.
4. The charging circuit of claim 1, further comprising an ac voltmeter connected in parallel with the first controlled end of the main relay.
5. The charging circuit of claim 1, further comprising a main switch, wherein one end of the main switch is connected to a mains supply, and the other end of the main switch is connected to one end of the first controlled end of the main relay.
6. The charging circuit of claim 5, further comprising a fuse, wherein the other end of the main switch is connected to one end of the first controlled end of the main relay through the fuse.
7. The charging circuit of claim 1, further comprising a first relay, wherein one end of a control end of the first relay is connected to the other end of the start button, the other end of the control end of the first relay is grounded, a first controlled end of the first relay is connected in parallel with the start button for self-locking after the first relay is electrified, one end of a second controlled end of the first relay is connected to one end of the start button, and the other end of the second controlled end of the first relay is connected to one end of the control end of the main relay.
8. The charging circuit according to claim 7, wherein the charging circuit further comprises a voice module, a second change-over switch, a second relay, a third relay, a first automatic switch and a second automatic switch, the second change-over switch being capable of being manually controlled and automatically controlled to switch each other, the voice module comprising a first prompt module, a second prompt module and a third prompt module, a power input terminal of the voice module being connected to a power source, one terminal of the second change-over switch and one terminal of the second automatic switch being connected to a power source, the other terminal of the second automatic switch being connected to a control terminal of the first prompt module for controlling operation of the first change-over switch, one terminal of a control terminal of the third relay being connected to the other terminal of the first change-over switch, the other terminal of a first controlled terminal of the third relay being connected to the other terminal of the first change-over switch, the second controlled terminal of the third relay being connected to the other terminal of the second relay, the second controlled terminal of the third relay being connected to the other terminal of the second relay being connected to the other terminal of the first relay, the second relay being connected to the other terminal of the first relay, the second controlled end other end of the second relay is connected with the second controlled end one end of the main relay, the second controlled end other end of the main relay is connected with the control end of the third prompt module so as to control the third prompt module to work, the second controlled end of the main relay is in a normally closed state, the third controlled end one end of the first relay is connected with one end of the starting button, the third controlled end other end of the first relay is connected with the third controlled end one end of the main relay, and the third controlled end other end of the main relay is connected with the control end of the second prompt module so as to control the second prompt module to work.
9. The charging circuit of claim 8, further comprising a charging light, one end of the charging light being connected to the other end of the third controlled end of the main relay, the other end of the charging light being grounded for prompting a state of charge.
10. A frequency converter charging arrangement, characterized in that the charging arrangement comprises a charging circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321270400.5U CN219659580U (en) | 2023-05-23 | 2023-05-23 | Frequency converter charging circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321270400.5U CN219659580U (en) | 2023-05-23 | 2023-05-23 | Frequency converter charging circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659580U true CN219659580U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321270400.5U Active CN219659580U (en) | 2023-05-23 | 2023-05-23 | Frequency converter charging circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659580U (en) |
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2023
- 2023-05-23 CN CN202321270400.5U patent/CN219659580U/en active Active
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