CN112164604A - Composite AC switch - Google Patents
Composite AC switch Download PDFInfo
- Publication number
- CN112164604A CN112164604A CN202011074377.3A CN202011074377A CN112164604A CN 112164604 A CN112164604 A CN 112164604A CN 202011074377 A CN202011074377 A CN 202011074377A CN 112164604 A CN112164604 A CN 112164604A
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- China
- Prior art keywords
- switch
- alternating current
- grid
- composite
- switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a composite alternating current switch which is formed by connecting a grid-connected alternating current switch and a mechanical switch in parallel, wherein the grid-connected alternating current switch is only responsible for switching on and off of an alternating current circuit, and the mechanical switch is only responsible for alternating current working current after switching on. When the composite alternating current switch is disconnected, the grid-connected alternating current switch and the mechanical switch are both disconnected; the on-off process of the composite alternating current switch is as follows: the grid-connected alternating current switch is firstly switched on, then the mechanical switch is switched on again, after the composite alternating current switch is stably switched on, the grid-connected alternating current switch and the mechanical switch are both in a conducting state, and in the switching-off process of the composite alternating current switch, the mechanical switch is firstly switched off under the condition of bearing the conducting voltage drop of the electronic switch, and then the grid-connected alternating current switch is switched off again. The composite AC switch can realize the on-off of the switch under automatic intelligent control, can be used as a general control switch, and can also be directly arranged on an AC power supply line to be used as a safety switch.
Description
Technical Field
The invention relates to a combined alternating current switch based on a cascade power tube and a mechanical switch
Background
The cascade power tube is a new power tube structure, the cells of the cascade power tube can be made very small, the internal current is uniform, the failure mechanism of a current type power device, namely the current edge effect and the filament effect, is solved, the maximum working temperature is 220 ℃, the latch failure is avoided, and the cascade power tube has good competitive advantage in the field of high voltage and high current. The grid-connected power tube comprises a grid-connected transistor and a grid-connected thyristor. Suitable for different voltage ranges.
The grid-connected power tube can realize the function of an alternating current switch in various combination modes, and the alternating current switch is high in switching speed, heat-resistant, reliable and low in cost. The intelligent control can be realized, but the conduction voltage drop is large, the power is high, and the heat dissipation of the circuit is not facilitated.
The mechanical switch is simple to use, low in price and very wide in application. When the circuit is switched on and off, an electric arc is generated when a mechanical switch is adopted to switch off a load, and the service life of the electric arc is influenced after long-term operation, so that the safety of a power grid is endangered. If the arc extinguishing device is added, the volume is large, the cost is high, and the cost performance is not high. With the rapid development of the field of intelligent electrical appliances, the requirement of the future market cannot be met by singly adopting a mechanical switch.
Disclosure of Invention
The invention aims to provide a compound alternating current switch which is small in size and low in cost, can be used as a general control switch, and can also be directly arranged on an alternating current power supply line to be used as a safety switch.
A composite AC switch is composed of a grid-connected AC switch and a mechanical switch which are connected in parallel.
The grid-connected alternating current switch is realized by adopting various combination modes such as series connection or parallel connection of grid-connected power tubes and the like, and is particularly responsible for the switching-on and switching-off tasks of a circuit.
The mechanical switch is not responsible for the switching-on and switching-off tasks of the alternating current circuit, and is only responsible for the alternating current working current after the switching-on.
When the composite alternating current switch is in an off state, the grid-connected alternating current switch and the mechanical switch are both in an off state;
the on-off process of the composite AC switch is as follows: the grid-connected alternating current switch is firstly switched on, then the mechanical switch is switched on again, the grid-connected alternating current switch and the mechanical switch are both in a conducting state under the stable switching-on state of the composite alternating current switch, and in the switching-off process of the composite alternating current switch, the mechanical switch is firstly switched off under the conducting voltage drop of the electronic switch, and then the grid-connected alternating current switch is switched off again.
The two switches connected in parallel with the composite switch act asynchronously, and the composite AC switch can realize the automatic and intelligent control on-off activity of the switch through the grid-connected AC switch. The characteristic of high switching speed of the cascade switch is fully utilized to complete the on-off work of the switch, and the mechanical switch is only switched on and off under the condition of bearing the conduction voltage drop of the electronic switch, so that the condition that the mechanical switch generates electric arcs when switching on and switching off the circuit is changed, the electric arcs are reduced or even eliminated, a corresponding arc extinguishing circuit can be omitted, and the invention task of designing the composite alternating current switch with small volume, low cost and reliable work is completed.
The invention is further described with reference to the following figures and detailed description.
Fig. 1 is a schematic diagram of the operation of a compound ac switch.
FIG. 2 is a circuit diagram of an example of a specific implementation of a cascade AC switch
Fig. 3 is an example of a circuit diagram of one implementation of a compound ac switch.
The detailed description of the invention shows a specific implementation circuit of the compound alternating current switch.
The grid-connected alternating current switch realizes on-off of the switch by controlling voltage to the gate pole, and when the gate pole control voltage is proper voltage, the grid-connected alternating current switch is switched off, and the composite alternating current switch is in a turn-off state.
The switching-on process of the compound alternating current switch is as follows: firstly, a proper gate control voltage is provided for the grid-connected alternating current switch, the grid-connected alternating current switch is ensured to be conducted after the gate control voltage is normally started to work, and the conducting voltage tends to be stable after the grid-connected alternating current switch is stabilized. When the mechanical switch is closed, the grid-connected alternating current switch is completely conducted, and the large-current impact process at the moment of circuit conduction is finished, so that the mechanical switch is closed only under the condition of bearing normal working current and the conduction voltage drop of the grid-connected alternating current switch. The main operating current after conduction is carried by the mechanical switch.
The composite alternating current switch is in a disconnection process, firstly, the mechanical switch is disconnected, the mechanical switch is completely disconnected only under the borne conduction voltage drop, the gate voltage of the grid-connected alternating current switch is controlled to switch off the grid-connected alternating current switch, and the composite alternating current switch is in a disconnection state.
While the embodiments of the ac compound switch have been described, it is understood that the present invention may be embodied in different forms and equivalents thereof without departing from the spirit and scope of the invention, which should be construed as limited only by the claims.
Claims (2)
1. A composite AC switch is characterized in that the switch design is based on a cascade power tube and a mechanical switch, and comprises the following contents:
(1) the cascade AC switch is realized by adopting various combination modes such as series connection or parallel connection and the like based on the cascade power tube;
(2) connecting an alternating current switch formed by a grid-connected power tube and a mechanical switch in parallel to realize a composite alternating current switch, wherein the grid-connected alternating current switch is particularly responsible for the switching-on and switching-off tasks of an alternating current circuit, the mechanical switch is not responsible for the switching-on and switching-off tasks of the circuit and is only responsible for bearing working current after the switching-on, and the two switches connected in parallel act asynchronously;
(3) when the composite alternating current switch is in an off state, the grid-connected alternating current switch and the mechanical switch are both in an off state;
(4) the on-off process of the composite AC switch is as follows: the grid-connected alternating current switch is firstly switched on, then the mechanical switch is switched on again, the grid-connected alternating current switch and the mechanical switch are both in a conducting state under the stable switching-on state of the composite alternating current switch, and in the switching-off process of the composite alternating current switch, the mechanical switch is firstly switched off under the conducting voltage drop of the electronic switch, and then the grid-connected alternating current switch is switched off again.
(5) The composite alternating current switch can realize the automatic intelligent control on-off activity of the switch through the grid-connected alternating current switch.
2. A compound ac switch according to claim 1, characterized in that
The conduction voltage drop of the grid-connected alternating current switch is larger than the conduction voltage drop when the mechanical switch is closed, and most of alternating current working current is borne by the mechanical switch in a conduction state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074377.3A CN112164604A (en) | 2020-10-10 | 2020-10-10 | Composite AC switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074377.3A CN112164604A (en) | 2020-10-10 | 2020-10-10 | Composite AC switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112164604A true CN112164604A (en) | 2021-01-01 |
Family
ID=73866523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011074377.3A Pending CN112164604A (en) | 2020-10-10 | 2020-10-10 | Composite AC switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112164604A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201134791Y (en) * | 2007-12-21 | 2008-10-15 | 新疆新能源股份有限公司 | Intelligent combined switch |
| CN101295591A (en) * | 2007-04-29 | 2008-10-29 | 上海云骅电子科技有限公司 | Mechatronic compound relay |
| US20200058454A1 (en) * | 2016-10-21 | 2020-02-20 | Eaton Intelligent Power Limited | Low-voltage circuit breaker device |
-
2020
- 2020-10-10 CN CN202011074377.3A patent/CN112164604A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295591A (en) * | 2007-04-29 | 2008-10-29 | 上海云骅电子科技有限公司 | Mechatronic compound relay |
| CN201134791Y (en) * | 2007-12-21 | 2008-10-15 | 新疆新能源股份有限公司 | Intelligent combined switch |
| US20200058454A1 (en) * | 2016-10-21 | 2020-02-20 | Eaton Intelligent Power Limited | Low-voltage circuit breaker device |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210101 |