CN220527904U - Intelligent control circuit for direct common ground connection of alternating current and direct current workplaces - Google Patents
Intelligent control circuit for direct common ground connection of alternating current and direct current workplaces Download PDFInfo
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- CN220527904U CN220527904U CN202321752908.9U CN202321752908U CN220527904U CN 220527904 U CN220527904 U CN 220527904U CN 202321752908 U CN202321752908 U CN 202321752908U CN 220527904 U CN220527904 U CN 220527904U
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Abstract
The utility model provides an intelligent control circuit directly and commonly connected with an alternating current and a direct current working place. The intelligent control circuit comprises a half-wave rectifying module, a direct current-direct current voltage reducing module, an intelligent regulation and control module and one or more power switch control modules, wherein the direct current working places of the direct current-direct current voltage reducing module and the intelligent regulation and control module and the alternating current working places of the one or more power switch control modules are commonly connected to a live wire or a zero wire of alternating current commercial power. The intelligent control circuit can realize direct connection of an alternating current rectifying ground, an alternating current working ground of a power switch control module, a direct current working ground of a direct current-direct current voltage reduction module and a direct current working ground of an intelligent regulation and control module, thereby realizing non-isolation control of intelligent household products.
Description
Technical Field
The utility model relates to the field of semiconductor control, in particular to an intelligent control circuit based on direct common ground connection of an alternating current working place and a direct current working place.
Background
Nowadays, intelligent home is becoming more and more popular, and various household lighting, heating, bathroom heater, electric curtain, exhaust fan, air cooler and other devices must be regulated and controlled by intelligent regulation and control modules. The intelligent regulation module generally needs to be powered by an isolated low-voltage power supply, the DC workplace is isolated and cannot be connected with the AC end rectification workplace, namely, the DC workplace of the isolated intelligent regulation module cannot be directly connected with the AC workplace of the power switch control module such as the thyristor of the AC loop. The conventional solution is to realize isolation of the high and low voltage sides by adding transformers, relays, optocouplers, etc., which requires increased costs and increased equipment space. In the market of home appliances, the commercial products are expected to reduce the cost and the space, thereby improving the competitiveness.
Disclosure of Invention
The utility model provides an intelligent control circuit based on direct common ground connection of an alternating-current working place and a direct-current working place.
According to an aspect of the present utility model, there is provided an intelligent control circuit, including a half-wave rectification module, a dc-dc step-down module, an intelligent regulation module, and one or more power switch control modules, wherein: one end of the half-wave rectification module is coupled with a zero line of the alternating current mains supply, and the other end of the half-wave rectification module is coupled with the direct current-direct current voltage reduction module and is coupled with a live wire of the alternating current mains supply through a first capacitor so as to output high-voltage direct current voltage obtained after the alternating current mains supply voltage is subjected to half-wave rectification to the direct current-direct current voltage reduction module; the direct current-direct current voltage reduction module is used for converting high-voltage direct current voltage into low-voltage direct current voltage which is used as the power supply voltage of the intelligent regulation module; the one or more power switch control modules are connected in parallel and are respectively used for controlling the corresponding one or more load circuits; and the intelligent regulation module is used for respectively providing driving control signals for the one or more power switch control modules, wherein the direct current-direct current voltage reduction module and the direct current working place of the intelligent regulation module and the alternating current working place of the one or more power switch control modules are commonly connected to the live wire of alternating current commercial power.
In some examples according to an aspect of the utility model, the one or more power switch control modules include a thyristor module, a relay module, a metal-oxide semiconductor field effect transistor, MOS, module, or an insulated gate bipolar transistor, IGBT, module.
In some examples according to an aspect of the utility model, the dc-dc step-down module includes a Buck step-down circuit and a low dropout linear regulator connected in series, the Buck step-down circuit is configured to convert the high voltage dc voltage to an intermediate low voltage dc voltage, the low dropout linear regulator is configured to convert the intermediate low voltage dc voltage to a low voltage dc voltage, and the Buck step-down circuit and the low dropout linear regulator are operatively connected in common to a line of the ac mains.
In some examples according to an aspect of the utility model, the half-wave rectification module includes a first diode and a second diode connected in series and having the same polarity.
In some examples according to an aspect of the present utility model, the intelligent control circuit further comprises an ac zero-crossing detection module for zero-crossing detection of the ac mains voltage to output an ac zero-crossing signal to the intelligent regulation module to control the intelligent regulation module to provide drive control signals to the one or more power switch control modules, respectively, at the zero-crossings of the ac mains voltage, wherein the ac zero-crossing detection module is operatively connected to the hot line of the ac mains.
In some examples according to an aspect of the utility model, an input of the ac zero crossing detection module is coupled between a first diode and a second diode in the half-wave rectification module.
According to another aspect of the present utility model, there is provided an intelligent control circuit, comprising a half-wave rectification module, a dc-dc step-down module, an intelligent regulation module, and one or more power switch control modules, wherein: one end of the half-wave rectifying module is coupled with a live wire of the alternating current mains supply, the other end of the half-wave rectifying module is coupled with the direct current-direct current voltage reducing module and is coupled with a zero line of the alternating current mains supply through a first capacitor so as to output high-voltage direct current voltage obtained after the alternating current mains supply voltage is subjected to half-wave rectification to the direct current-direct current voltage reducing module; the direct current-direct current voltage reduction module is used for converting high-voltage direct current voltage into low-voltage direct current voltage which is used as the power supply voltage of the intelligent regulation module; the one or more power switch control modules are connected in parallel and are respectively used for controlling the corresponding one or more load circuits; and the intelligent regulation module is used for respectively providing driving control signals for the one or more power switch control modules, wherein the direct current-direct current voltage reduction module and the direct current working place of the intelligent regulation module and the alternating current working place of the one or more power switch control modules are commonly connected to the zero line of alternating current commercial power.
In some examples according to another aspect of the utility model, the one or more power switch control modules include a thyristor module, a relay module, a metal-oxide semiconductor field effect transistor, MOS, module, or an insulated gate bipolar transistor, IGBT, module.
In some examples according to another aspect of the utility model, the dc-dc step-down module includes a Buck step-down circuit and a low dropout linear regulator connected in series, the Buck step-down circuit is configured to convert a high voltage dc voltage to an intermediate low voltage dc voltage, the low dropout linear regulator is configured to convert the intermediate low voltage dc voltage to a low voltage dc voltage, and the dc of the Buck step-down circuit and the low dropout linear regulator are operatively commonly connected to a neutral line of an ac mains.
In some examples according to another aspect of the utility model, the half-wave rectification module includes a first diode and a second diode connected in series and having the same polarity.
In some examples according to another aspect of the present utility model, the intelligent control circuit further includes an ac zero-crossing detection module for zero-crossing detection of the ac mains voltage to output an ac zero-crossing signal to the intelligent regulation module to control the intelligent regulation module to provide drive control signals to the one or more power switch control modules, respectively, at the zero-crossings of the ac mains voltage, wherein the ac zero-crossing detection module is operatively connected to a zero line of the ac mains.
In some examples according to another aspect of the utility model, the input of the ac zero crossing detection module is coupled between a first diode and a second diode in the half-wave rectification module.
According to the intelligent control circuit provided by the embodiment of the utility model, direct connection of the alternating current rectifying ground, the alternating current working ground of the power switch control module, the direct current working ground of the direct current-direct current voltage reduction module and the direct current working ground of the intelligent regulation and control module can be realized, so that non-isolation control of intelligent household products is realized.
Drawings
The utility model will be better understood from the following description of specific embodiments thereof, taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic circuit block diagram of an exemplary L-line commonly connected intelligent control circuit, according to some embodiments of the utility model;
fig. 2 shows a schematic circuit configuration diagram of an exemplary N-wire commonly connected intelligent control circuit according to further embodiments of the present utility model.
Detailed Description
Features and exemplary embodiments of various aspects of the utility model are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the utility model by showing examples of the utility model. The present utility model is in no way limited to any particular configuration set forth below, but rather covers any modification, substitution, or improvement of elements and components without departing from the spirit of the utility model. In the drawings and the following description, some well-known structures and components are not shown in order to avoid unnecessarily obscuring the present utility model.
Conventionally, when a power switch control module such as a silicon controlled rectifier is used to perform phase modulation or on-off control on a household appliance, a direct current working place of an intelligent control module (for example, a Micro Control Unit (MCU) chip) cannot be directly connected and driven with a silicon controlled rectifier or other power switch devices connected in series in an alternating current circuit, so that the cost of the whole intelligent control circuit is high, and the space occupied by the intelligent control circuit is increased.
According to the embodiment of the utility model, the intelligent control circuit based on direct common ground connection of the alternating current working place and the direct current working place is provided, and direct connection of the alternating current rectifying place, the alternating current working place of the power switch control module, the direct current working place of the direct current-direct current (DC-DC) voltage reduction module and the direct current working place of the intelligent regulation and control module can be realized, so that non-isolation control of intelligent household products is realized, and the cost and occupied space of the intelligent control circuit are saved.
An intelligent control circuit according to an embodiment of the present utility model is described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic circuit block diagram of an exemplary L-line common-ground intelligent control circuit according to some embodiments of the present utility model. In the intelligent control circuit shown in fig. 1, the L-line (live line of alternating current mains supply) common-ground technology is adopted, that is, in the intelligent control circuit, an alternating current rectifying ground, an alternating current working ground of a power switch control module, a direct current working ground of a DC-DC voltage reducing module and a direct current working ground of an intelligent regulation module are all directly connected to the L-line.
As shown in fig. 1, the intelligent control circuit may include a half-wave rectification module, a DC-DC buck module, an intelligent regulation Module (MCU), and one or more power switch control modules.
The half-wave rectification module may be composed of two series-connected homopolar diodes (e.g., a first diode D1 and a second diode D2). It should be noted that half-wave rectification can be implemented by using only one diode, but that the use of two diodes connected in series to implement half-wave rectification can protect the entire intelligent control circuit in the event of a sudden increase in ac voltage (e.g., in the event of a lightning strike).
One end of the half-wave rectification module is coupled with a zero line (N line) of alternating current mains supply, and the other end of the half-wave rectification module is coupled with the DC-DC voltage reduction module and is coupled with an L line of the alternating current mains supply through a first capacitor (for example, an electrolytic capacitor EC 1) so as to output high-voltage direct current voltage obtained after the alternating current mains supply voltage is subjected to half-wave rectification to the DC-DC voltage reduction module. Here, the ac rectification of the intelligent control circuit is directly connected to the L line of the ac mains.
The DC-DC step-down module is used to convert a high-voltage direct-current voltage into a low-voltage direct-current voltage (e.g., 3.3V to 5V), which can be used as a power supply voltage of the intelligent regulation module U3 (e.g., MCU chip). As shown in fig. 1, the low dc voltage may be input to pin 13 of the MCU chip.
In this embodiment, the DC-DC step-down module actually includes a two-stage step-down module, i.e., a Buck step-down circuit and a low dropout linear regulator connected in series. As shown in fig. 1, the Buck circuit may be composed of a Pulse Width Modulation (PWM) control chip U1, a third diode D3, an inductor L1, a second capacitor EC2, and a resistor R8, for converting the high-voltage dc voltage from the half-wave rectification module into an intermediate low-voltage dc voltage (e.g., 12V). The intermediate low voltage dc voltage may then be input to a low dropout linear regulator (LDO) U2, which low dropout linear regulator U2 is configured to convert the intermediate low voltage dc voltage to a low voltage dc voltage (e.g., 5V). Here, the Buck voltage step-down circuit and the dc operation of the low dropout linear regulator are commonly connected to the L line of the ac mains. It should be noted, however, that the workplace of the PWM control chip U1 may be a separate workplace, and need not be an L-line connected to the ac mains.
According to an embodiment of the present utility model, one or more power switch control modules may be connected in parallel for controlling the corresponding one or more load circuits, respectively. For example, five power switch control modules are shown in fig. 1: relays J1 and J2, and thyristors Q1, Q2, and Q3 are used to control the corresponding load circuit L1 (heating 1), load circuit L2 (heating 2), load circuit L3 (blowing), load circuit L4 (ventilation), and load circuit L5 (lighting), respectively. According to an embodiment of the present utility model, the ac workings of relays J1 and J2 and the ac workings of thyristors Q1, Q2 and Q3 are both connected to the L line of the ac mains.
It should be noted here that, in addition to relays and thyristors, the parallel-connected power switch control modules may also include metal-oxide semiconductor field effect transistor (MOS) modules, or any other existing or future developed power switch control modules such as Insulated Gate Bipolar Transistor (IGBT) modules.
As described above, after rectifying and step-down processing, the ac mains voltage may be converted into an intermediate low-voltage dc voltage of, for example, 12V and a low-voltage dc voltage of, for example, 5V, wherein the low-voltage dc voltage of 5V may be used as the supply voltage of the intelligent regulation module U3, and the intermediate low-voltage dc voltage of 12V may be used as the supply voltage of the power switching module (if necessary), for example, as the supply voltages of the relays J1 and J2.
The intelligent regulation and control module U3 is used for providing driving control signals to one or more power switch control modules respectively. For example, as shown in fig. 1, the intelligent regulation module U3 may output five driving control signals K1 to K5 for driving and controlling the relays J1 and J2 and the thyristors Q1, Q2 and Q3, respectively. Note that the dc workplace of the intelligent regulation module U3 is also connected to the L line of the ac mains.
Therefore, in the intelligent control circuit shown in fig. 1, the ac rectifying ground, the Buck voltage step-down circuit, and the dc operating ground of the low dropout linear regulator, the dc operating ground of the intelligent regulation module, and the ac operating ground of the parallel-connected power switch control module are commonly connected to the L line of the ac utility power. That is, in the intelligent control circuit, the intelligent regulation module can directly drive the power switch control module without providing an isolation module such as a transformer or an optocoupler.
Furthermore, according to some embodiments of the present utility model, an ac zero-crossing detection module may be further included in the intelligent control circuit as shown in fig. 1, for performing zero-crossing detection on an ac mains voltage. As shown in fig. 1, an input terminal L0 of the ac zero-crossing detection module may be coupled between the first diode D1 and the second diode D2, and an ac zero-crossing signal Vz output by the ac zero-crossing detection module may be input to a pin 27 of the intelligent regulation module U3 to control the intelligent regulation module U3 to respectively provide driving control signals to one or more power switch control modules at zero-crossing points of an ac mains voltage, so that power loss of the intelligent control circuit may be reduced. It should be noted that the ac zero crossing detection module is operatively connected to the L-line of the ac mains as well.
In addition, instead of the L-line common ground connection, the N-line common ground connection may be similarly employed. That is, in the intelligent control circuit, the ac rectifying ground, the ac operating ground of the power switch control module, the DC operating ground of the DC-DC step-down module, and the DC operating ground of the intelligent regulation module are all directly connected to the N-line.
Fig. 2 shows a schematic circuit configuration diagram of an exemplary N-wire commonly connected intelligent control circuit according to further embodiments of the present utility model. Similar to the intelligent control circuit shown in fig. 1, the intelligent control circuit shown in fig. 2 may also include a half-wave rectifier module, a Buck circuit, a low dropout linear regulator, an intelligent regulation Module (MCU), an ac zero crossing detection module, and one or more power switch control modules. The structure, function and manner of connection of these modules or circuits to each other are similar to those shown in fig. 1, and thus, for the sake of brevity, the description will not be repeated here.
Unlike the intelligent control circuit shown in fig. 1, in the intelligent control circuit shown in fig. 2, one end of the half-wave rectification module is coupled with the L line of the ac mains, the other end is coupled with the Buck module and is coupled with the N line of the ac mains through the first capacitor EC1, and the ac rectification ground, the dc operation ground of the Buck circuit and the low dropout linear regulator, the dc operation ground of the intelligent regulation module, the operation ground of the ac zero-crossing detection module, and the operation ground of the plurality of power switch control modules connected in parallel are all directly connected to the N line of the ac mains.
Note that in the intelligent control circuits shown in fig. 1 and 2, parameter values of some devices (e.g., resistors, capacitors, inductors, etc.) are schematically shown, but it should be understood that these parameter values are merely example parameter values in the circuit design process, and the aspects of the present utility model are not limited by these parameter values.
It should also be noted that although the intelligent control circuit shown in fig. 1 and 2 is for a bathroom warmer control panel, it should be understood by those skilled in the art that the intelligent control circuit according to the present utility model is not limited to use for a bathroom warmer control panel, but may be used in the control of various smart home, household appliances, etc. involving a thyristor, relay, MOS, or IGBT etc. semiconductor power switch control module.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that the inventive aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical idea of the utility model.
Those skilled in the art will appreciate that the above-described embodiments are exemplary and not limiting. The different technical features presented in the different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in view of the drawings, the description, and the claims. The presence of certain features in different dependent claims does not imply that these features cannot be combined to advantage.
Claims (12)
1. An intelligent control circuit comprises a half-wave rectification module, a direct current-direct current voltage reduction module, an intelligent regulation and control module and one or more power switch control modules, wherein:
one end of the half-wave rectification module is coupled with a zero line of alternating current mains supply, the other end of the half-wave rectification module is coupled with the direct current-direct current voltage reduction module and is coupled with a live wire of the alternating current mains supply through a first capacitor so as to output high-voltage direct current voltage obtained after half-wave rectification of alternating current mains supply voltage to the direct current-direct current voltage reduction module;
the direct current-direct current voltage reduction module is used for converting the high-voltage direct current voltage into low-voltage direct current voltage which is used as the power supply voltage of the intelligent regulation module;
the one or more power switch control modules are connected in parallel and are respectively used for controlling the corresponding one or more load circuits; and is also provided with
The intelligent regulation and control module is used for respectively providing driving control signals for the one or more power switch control modules,
the direct current-direct current voltage reduction module, the direct current working place of the intelligent regulation module and the alternating current working place of the one or more power switch control modules are commonly connected to the live wire of the alternating current commercial power.
2. The intelligent control circuit of claim 1, wherein the one or more power switch control modules comprise a thyristor module, a relay module, a metal-oxide semiconductor field effect transistor, MOS, module, or an insulated gate bipolar transistor, IGBT, module.
3. The intelligent control circuit of claim 1, wherein the dc-dc step-down module comprises a Buck step-down circuit and a low dropout linear regulator connected in series, the Buck step-down circuit is configured to convert the high voltage dc voltage to an intermediate low voltage dc voltage, the low dropout linear regulator is configured to convert the intermediate low voltage dc voltage to the low voltage dc voltage, and the Buck step-down circuit and the low dropout linear regulator are operatively connected in common to a line of the ac mains.
4. A smart control circuit according to any one of claims 1 to 3, wherein the half-wave rectification module comprises a first diode and a second diode connected in series and of the same polarity.
5. The intelligent control circuit of claim 4, further comprising an ac zero-crossing detection module for zero-crossing the ac mains voltage to output an ac zero-crossing signal to the intelligent regulation module to control the intelligent regulation module to provide the drive control signal to the one or more power switch control modules, respectively, at the zero-crossing of the ac mains voltage, wherein the ac zero-crossing detection module is operatively connected to a hot line of the ac mains.
6. The intelligent control circuit of claim 5, wherein an input of the ac zero crossing detection module is coupled between the first diode and the second diode.
7. An intelligent control circuit comprises a half-wave rectification module, a direct current-direct current voltage reduction module, an intelligent regulation and control module and one or more power switch control modules, wherein:
one end of the half-wave rectification module is coupled with a live wire of the alternating current mains supply, the other end of the half-wave rectification module is coupled with the direct current-direct current voltage reduction module and is coupled with a zero line of the alternating current mains supply through a first capacitor so as to output high-voltage direct current voltage obtained after half-wave rectification of the alternating current mains supply voltage to the direct current-direct current voltage reduction module;
the direct current-direct current voltage reduction module is used for converting the high-voltage direct current voltage into low-voltage direct current voltage which is used as the power supply voltage of the intelligent regulation module;
the one or more power switch control modules are connected in parallel and are respectively used for controlling the corresponding one or more load circuits; and is also provided with
The intelligent regulation and control module is used for respectively providing driving control signals for the one or more power switch control modules,
the direct current working places of the direct current-direct current voltage reduction module and the intelligent regulation module and the alternating current working places of the one or more power switch control modules are commonly connected to a zero line of the alternating current commercial power.
8. The intelligent control circuit of claim 7, wherein the one or more power switch control modules comprise a thyristor module, a relay module, a metal-oxide-semiconductor field effect transistor, MOS, or an insulated gate bipolar transistor, IGBT, module.
9. The intelligent control circuit of claim 7, wherein the dc-dc step-down module comprises a Buck step-down circuit and a low dropout linear regulator connected in series, the Buck step-down circuit is configured to convert the high voltage dc voltage to an intermediate low voltage dc voltage, the low dropout linear regulator is configured to convert the intermediate low voltage dc voltage to the low voltage dc voltage, and the Buck step-down circuit and the low dropout linear regulator are operatively connected in common to a neutral line of the ac mains.
10. The intelligent control circuit of any of claims 7-9, wherein the half-wave rectification module comprises a first diode and a second diode connected in series and of like polarity.
11. The intelligent control circuit of claim 10, further comprising an ac zero-crossing detection module for zero-crossing the ac mains voltage to output an ac zero-crossing signal to the intelligent regulation module to control the intelligent regulation module to provide the drive control signal to the one or more power switch control modules, respectively, at the zero-crossing of the ac mains voltage, wherein the ac zero-crossing detection module is operatively connected to a zero line of the ac mains.
12. The intelligent control circuit of claim 11, wherein an input of the ac zero crossing detection module is coupled between the first diode and the second diode.
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| CN202321752908.9U CN220527904U (en) | 2023-07-05 | 2023-07-05 | Intelligent control circuit for direct common ground connection of alternating current and direct current workplaces |
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| CN202321752908.9U CN220527904U (en) | 2023-07-05 | 2023-07-05 | Intelligent control circuit for direct common ground connection of alternating current and direct current workplaces |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118732777A (en) * | 2024-08-30 | 2024-10-01 | 国芯微电子(广东)有限公司 | A power routing power chip, control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118732777A (en) * | 2024-08-30 | 2024-10-01 | 国芯微电子(广东)有限公司 | A power routing power chip, control system and method |
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