CN215343921U

CN215343921U - Low-loss fast-conducting phase-change switch

Info

Publication number: CN215343921U
Application number: CN202120957915.7U
Authority: CN
Inventors: 肖朝法; 张显才; 徐俊锋; 罗建刚; 邱志辉
Original assignee: Wuhan Jiangbei Switch Co ltd
Current assignee: Wuhan Yingdian Intelligent Electric Co ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-12-28
Anticipated expiration: 2031-05-07

Abstract

The utility model discloses a low-loss fast-conducting phase-change switch in the technical field of electronic elements, which comprises: an electronic switch; the mechanical switch is connected to the electronic switch, the electronic switch is formed by combining a silicon controlled rectifier and a silicon controlled rectifier controller, the mechanical switch is a magnetic latching relay, the utility model eliminates contact spark, reduces surge current, reduces switching loss, avoids impact on user electric equipment, the mechanical switch is in a conducting state at the moment when the mechanical switch is triggered to attract or disconnect, the voltage between electrodes is zero, namely the mechanical switch can be ensured to be switched on and off under the condition of zero voltage, the contact spark is eliminated, the surge current is reduced, the electronic switch is switched on and off and is also set to be the moment of voltage zero crossing, the switching loss is reduced, and the impact on the user electric equipment is avoided.

Description

Low-loss fast-conducting phase-change switch

Technical Field

The utility model relates to the technical field of electronic elements, in particular to a low-loss fast-conducting phase-change switch.

Background

Electronic components are basic elements in electronic circuits, typically individually packaged, and have two or more leads or metal contacts. The electronic components are interconnected to form an electronic circuit having a specific function, such as: amplifiers, radio receivers, oscillators, etc., one of the common ways to connect electronic components is soldering to a printed circuit board. The electronic components may be individual packages or groups of varying complexity. The words switch are to be interpreted as open and closed. It also refers to an electronic component that can open a circuit, interrupt a current, or cause it to flow to other circuits. The most common switches are electromechanical devices operated by a person, in which there are one or several electrical contacts. The "closed" of a contact means that the electronic contact is conductive, allowing current to flow; an "open" of the switch indicates that the electrical contact is not conductive, creating an open circuit, and not allowing current to flow.

The commutation switch is a key device for three-phase electric balance by adopting a commutation method, and the commutation switch has the characteristics of large working current, short commutation time and the like.

The existing phase change switch can not be switched on and off under the condition of zero voltage, and under the condition of switching on, sparks are easily generated at a contact part, so that surge current is generated, and impact is caused on electric equipment of a user.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-loss fast-conducting phase-change switch, which aims to solve the problems that the existing phase-change switch proposed in the background art cannot be switched on and off under the condition of zero voltage, and when the phase-change switch is switched on, sparks are easily generated at contact parts, surge current is generated, and impact is caused on electric equipment of users.

In order to achieve the purpose, the utility model provides the following technical scheme: a low loss fast conducting commutation switch, comprising:

an electronic switch;

a mechanical switch connected to the electronic switch.

Preferably, the electronic switch is formed by combining a silicon controlled rectifier and a silicon controlled rectifier controller.

Preferably, the silicon controlled rectifier is a BTA100-800 silicon controlled rectifier, and the silicon controlled rectifier controller is an MOC3083 silicon controlled rectifier controller.

Preferably, the mechanical switch is a magnetic latching relay.

Preferably, the magnetic latching relay is an HFE19-60A magnetic latching relay.

Compared with the prior art, the utility model has the beneficial effects that: the utility model eliminates the contact spark, reduces the surge current, reduces the switching loss, avoids the impact on the user electric equipment, utilizes the rapid conduction characteristic of the bidirectional controllable silicon, firstly triggers the electronic switch to be conducted, then triggers the mechanical switch to be conducted, at the moment, the current flows from the electronic switch to the mechanical switch, after ensuring the conduction of the mechanical switch, then triggers the electronic switch to be disconnected, the current completely flows from the mechanical switch, when the electronic switch is disconnected, the electronic switch is firstly triggered to be conducted, at the moment, the electronic switch and the mechanical switch in the circuit are both in a state of being conducted simultaneously, then triggers the mechanical switch to be disconnected, the current in the circuit is completely transferred to the electronic switch, and finally when the electronic switch is triggered to be disconnected, no matter the mechanical switch is triggered to be attracted or disconnected, at the moment, the electronic switch connected in parallel with the mechanical switch is in a conducting state, the voltage between poles is zero, the switch has the advantages that the mechanical switch can be switched on and off under the condition of zero voltage, the function similar to a soft switch is realized, the contact spark is eliminated, the surge current is reduced, the on and off of the electronic switch are set to be the time of the voltage zero crossing point, the switch completely realizes the function of the soft switch, the switching loss is reduced, the impact on user electric equipment is avoided, the on and off working process of the soft switch is analyzed, the electronic switch is only connected into a circuit to work at the short time of the on and off of the switch, a heat dissipation device is not needed to be installed, and the switch has the advantages of low power consumption, large current and high speed of the electronic switch.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an electronic switch circuit according to the present invention;

FIG. 3 is a schematic diagram of a mechanical switch circuit according to the present invention.

In the figure: 100 electronic switches, 200 mechanical switches.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention provides a low-loss fast-conducting phase-change switch, which eliminates the contact spark, reduces the surge current, reduces the switching loss, and avoids the impact on the user's electric equipment, please refer to fig. 1, which includes: an electronic switch 100 and a mechanical switch 200;

referring to fig. 1-2, the electronic switch 100 is formed by combining a thyristor and a thyristor controller, the thyristor is a BTA100-800 thyristor, the maximum current is 100A, the highest withstand voltage is 800V, the thyristor controller is a MOC3083 thyristor controller, the electronic switch 100 is a photoelectric coupler with a zero-crossing detection function, and is mainly used for driving the thyristor and other devices to realize the function of the electronic switch, and the specific circuit is shown in fig. 2;

referring to fig. 1-3, a mechanical switch 200 is connected to an electronic switch 100, the mechanical switch 200 is connected in parallel to the electronic switch 100, the mechanical switch 200 is a magnetic latching relay, the magnetic latching relay is a HFE19-60A magnetic latching relay, the maximum current of the magnetic latching relay is 90A, the control voltage is 12V, the magnetic latching relay is also a switch, and the on-off control of the circuit can be realized as same as a common relay, but the difference is that the normally open or normally closed state of the magnetic latching relay does not need to continuously apply the control voltage, the state maintenance mainly depends on the action of internal permanent magnetic steel, the magnetic latching relay usually only needs to apply positive pulse voltage to realize the attraction and the attraction of the relay, and apply negative pulse voltage to realize the disconnection of the relay, the pulse width is generally 100ms, because the control of the magnetic latching relay needs to apply positive or negative voltage, the generation of the control voltage is completed by the magnetic latching relay special drive chip MD7620 in coordination with the MCU at regular time, and the circuit is shown in fig. 3, in the circuit, the resistor R6 is a current-limiting resistor, INA and INB are control signals sent by the MCU, when INA is in a high level and INB is in a low level, a forward control voltage is generated, the magnetic latching relay is attracted, otherwise, the magnetic latching relay is disconnected.

When the bidirectional triode thyristor is used specifically, the rapid conduction characteristic of the bidirectional triode thyristor is utilized, firstly, the electronic switch 100 is triggered to be conducted, then, the mechanical switch 200 is triggered to be conducted, at the moment, the current flows through the mechanical switch 200 completely, when the mechanical switch 200 is disconnected, the electronic switch 100 is triggered to be conducted, at the moment, the electronic switch 100 and the mechanical switch 200 in the circuit are both in a state of being conducted at the same time, then, the mechanical switch 200 is triggered to be disconnected, the current in the circuit is transferred to the electronic switch 100 completely, and finally, the electronic switch 100 is triggered to be disconnected, as can be seen from analysis, at the moment that the mechanical switch 200 is triggered to be attracted or disconnected, at the moment, the electronic switch 100 connected with the mechanical switch 200 in parallel is in a conducting state, the voltage between electrodes of the electronic switch is zero, namely, the mechanical switch 200 can be switched on and off under the condition of zero voltage, the function similar to a 'soft' switch is realized, the contact spark is eliminated, the surge current is reduced, the on-off of the electronic switch 100 is set to be the time of the zero crossing point of the voltage, the switch completely realizes the function of the 'soft' switch, the switching loss is reduced, the impact on the user electric equipment is avoided, the analysis of the on-off working process of the 'soft' switch can be obtained, the electronic switch 100 is only connected into a circuit to work at the short time of the on-off of the switch, a heat dissipation device is not needed to be installed, and the mechanical switch has the advantages of low power consumption, large current and high speed of the electronic switch 100.

While the utility model has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. A low-loss fast-conducting phase change switch, comprising: the method comprises the following steps:

the electronic switch (100) is formed by combining a silicon controlled rectifier and a silicon controlled rectifier controller, wherein the silicon controlled rectifier is a BTA100-800 silicon controlled rectifier, and the silicon controlled rectifier controller is an MOC3083 silicon controlled rectifier controller;

a mechanical switch (200), said mechanical switch (200) connected to said electronic switch (100), said mechanical switch (200) being a magnetically held relay, said magnetically held relay being an HFE19-60A magnetically held relay.