阅读说明：本技术 电子开关 (Electronic switch ) 是由 杨玉春 邢路军 于 2019-12-02 设计创作，主要内容包括：本发明提供了一种电子开关,该电子开关包括多个电子开关元件、驱动端子、输入端子和输出端子；多个电子开关元件的基极与驱动端子连接,多个电子开关元件的集电极与输入端子连接,多个电子开关元件的发射极与输出端子连接；多个电子开关元件并联连接,多个电子开关元件包括相对设置的第一多个电子开关元件和第二多个电子开关元件,第一指定电子开关元件与第二指定电子开关元件的负载值相同,其中,第一指定电子开关元件为第一多个电子开关元件中的电子开关元件,第二指定电子开关元件为第二多个电子开关元件中的电子开关元件,第一指定电子开关元件与第二指定电子开关元件相对设置。本发明能够有效改善并联电子开关元件电流及发热不均衡的问题。(The invention provides an electronic switch, comprising a plurality of electronic switch elements, a driving terminal, an input terminal and an output terminal; bases of the plurality of electronic switching elements are connected to the drive terminal, collectors of the plurality of electronic switching elements are connected to the input terminal, and emitters of the plurality of electronic switching elements are connected to the output terminal; the electronic switching elements are connected in parallel, the electronic switching elements comprise a first plurality of electronic switching elements and a second plurality of electronic switching elements which are arranged oppositely, and the load values of the first designated electronic switching elements and the second designated electronic switching elements are the same, wherein the first designated electronic switching elements are electronic switching elements in the first plurality of electronic switching elements, the second designated electronic switching elements are electronic switching elements in the second plurality of electronic switching elements, and the first designated electronic switching elements and the second designated electronic switching elements are arranged oppositely. The invention can effectively solve the problem of unbalanced current and heat generation of the parallel electronic switching element.)

1. An electronic switch, comprising:

a plurality of electronic switching elements, a drive terminal, an input terminal, and an output terminal;

the base electrodes of the plurality of electronic switching elements are connected to the drive terminal, the collector electrodes of the plurality of electronic switching elements are connected to the input terminal, and the emitter electrodes of the plurality of electronic switching elements are connected to the output terminal;

the electronic switch elements are connected in parallel, the electronic switch elements comprise a first electronic switch element and a second electronic switch element which are arranged oppositely, and the load values of the first designated electronic switch element and the second designated electronic switch element are the same, wherein the first designated electronic switch element is an electronic switch element in the first electronic switch elements, the second designated electronic switch element is an electronic switch element in the second electronic switch elements, and the first designated electronic switch element and the second designated electronic switch element are arranged oppositely.

2. The electronic switch of claim 1, further comprising a substrate;

the electronic switch elements are arranged on the upper surface of the substrate and distributed in a U shape;

the input terminal is arranged at the bottom of the U shape; the output terminal is arranged at the inner position of the U shape; the drive terminal is provided at the position of the U-shaped opening.

3. The electronic switch according to claim 2, wherein the load values of the plurality of electronic switching elements are the same; the first and second pluralities of electronic switching elements comprise the same number of electronic switching elements; the first plurality of electronic switch elements and the second plurality of electronic switch elements are symmetrically arranged on two parallel sides of the U shape along the central axis of the U shape.

4. The sub-switch according to claim 3, wherein bases of the plurality of electronic switching elements are connected to the driving terminal through driving wires, collectors of the plurality of electronic switching elements are connected to the input terminal through input wires, emitters of the plurality of electronic switching elements are connected to the output terminal through output wires, and the driving wires are symmetrically arranged along two parallel sides of a U-shape; the input conductors are symmetrically arranged along two parallel sides of the U-shape.

5. The electronic switch of claim 1, wherein the electronic switching element comprises: a triode, a MOSFET, or an IGBT.

6. The electronic switch of claim 2, further comprising a housing; the plurality of electronic switching elements are soldered on the substrate, and the substrate is disposed on the housing through the input terminal, the output terminal, and the screw.

7. The electronic switch of claim 6, wherein the screws are disposed on the base of the input terminal and the output terminal.

8. An electronic switch according to any of claims 1-7, comprising a number of electronic switching elements of four.

9. An electronic switch, comprising two electronic switches according to any one of claims 1 to 7 connected in series; wherein the collector of one electronic switch is connected to the emitter of the other electronic switch.

10. An electronic switch, characterized in that it comprises two electronic switches according to claim 8 connected in parallel.

Technical Field

The present invention relates to the field of electronic switches, and more particularly, to an electronic switch.

Background

High power electronic switches can be implemented using low power electronic components in parallel. The parallel low-power electronic components have different inductance and resistance in the loop due to different spatial distribution, and the parallel electronic components have common input and output terminals and common driving terminals, and the components far away from the terminals have larger loop inductance and resistance, and the components near the terminals have smaller loop inductance and resistance.

As shown in fig. 1, the high power electronic switch is composed of four triodes of K1, K2, K3 and K4 connected in parallel, four switch emitters and four switches collectors are respectively connected to an input terminal and an output terminal, and bases of the four switches are connected to a driving terminal. The parallel high-power electronic switch is equivalent to a power triode with a base electrode, a collector electrode and an emitter electrode and with the output power capability close to four times that of a single triode.

The wires coupled to the base, collector and emitter may be equivalent to inductances and resistances, the parallel devices may be spatially distributed in arrangement, and the inductances and resistances of each device may be different from each other as viewed from the positions of the input terminals, the output terminals, and the drive terminals. From the input, the resistance coupled to the collector of K1 is R1, the inductance is L1, the resistance coupled to the collector of K4 is the sum of R1, R2, R3, R4, and the inductance is the sum of L1, L2, L3, L4. It is clear that the resistance and inductance of K1 are less than the resistance and inductance of K4, respectively. Similarly, the resistances and inductances of the base, collector and emitter of K1, K2, K3 and K4 are all different.

It is known that different equivalent inductances and resistances cause different switching speeds of the switching elements, and that the current flowing through each switching element is different at the instant of switching on and off and during conduction. As shown in fig. 1, each parallel switch element of the parallel electronic switch in the prior art has unbalanced heat generation, high heat generation when being turned on quickly, low heat generation when being turned on slowly, and high heat generation when having small resistance, and the parallel switch elements may even sink into positive feedback: the more unbalanced the heating, the more unbalanced the current, resulting in a larger current imbalance and finally in switch damage due to thermal runaway.

Disclosure of Invention

In view of the above, one of the objectives of the embodiments of the present disclosure is to solve one or more of the aforementioned problems and to provide a technical solution capable of reducing a difference in heat generation power of each element in a parallel electronic switch.

The invention innovatively provides an electronic switch, which comprises:

a plurality of electronic switching elements, a drive terminal, an input terminal, and an output terminal;

the base electrodes of the plurality of electronic switching elements are connected to the drive terminal, the collector electrodes of the plurality of electronic switching elements are connected to the input terminal, and the emitter electrodes of the plurality of electronic switching elements are connected to the output terminal;

the electronic switch elements are connected in parallel, the electronic switch elements comprise a first electronic switch element and a second electronic switch element which are arranged oppositely, and the load values of the first designated electronic switch element and the second designated electronic switch element are the same, wherein the first designated electronic switch element is an electronic switch element in the first electronic switch elements, the second designated electronic switch element is an electronic switch element in the second electronic switch elements, and the first designated electronic switch element and the second designated electronic switch element are arranged oppositely.

Further, the device also comprises a substrate;

the electronic switch elements are arranged on the upper surface of the substrate and distributed in a U shape;

the input terminal is arranged at the bottom of the U shape; the output terminal is arranged at the inner position of the U shape; the drive terminal is provided at the position of the U-shaped opening.

Further, the load values of the plurality of electronic switching elements are the same; the first and second pluralities of electronic switching elements comprise the same number of electronic switching elements; the first plurality of electronic switch elements and the second plurality of electronic switch elements are symmetrically arranged on two parallel sides of the U shape along the central axis of the U shape.

Further, bases of the plurality of electronic switching elements are connected to the driving terminal through a driving wire, collectors of the plurality of electronic switching elements are connected to the input terminal through an input wire, emitters of the plurality of electronic switching elements are connected to the output terminal through an output wire, and the driving wires are symmetrically arranged along two parallel sides of the U shape; the input conductors are symmetrically arranged along two parallel sides of the U-shape.

Further, the electronic switching element includes: a triode, a MOSFET, or an IGBT.

Further, the device also comprises a shell; the plurality of electronic switching elements are soldered on the substrate, and the substrate is disposed on the housing through the input terminal, the output terminal, and the screw.

Further, the screws are provided on the bases of the input terminal and the output terminal.

Further, the number of the electronic switching elements included is four.

The invention also discloses an electronic switch, which comprises two electronic switches connected in series; wherein the collector of one electronic switch is connected to the emitter of the other electronic switch.

The invention also discloses an electronic switch which comprises two electronic switches connected in parallel.

The invention has the beneficial effects that: the invention provides a technical scheme for reducing heating power difference, opening time difference and current difference of each element in a parallel electronic switch. Furthermore, the substrate is tightly attached to the shell, so that heat can be conducted out in time, low-temperature operation of the electronic switch is guaranteed, and the service life is prolonged.

Drawings

Fig. 1 is a structural view of a conventional electronic switch.

Fig. 2 illustrates a block diagram of an electronic switch according to an embodiment of the present disclosure.

FIG. 3 illustrates a block diagram of an electronic switch according to one embodiment of the present disclosure.

FIG. 4 illustrates a block diagram of an electronic switch according to one embodiment of the present disclosure.

FIG. 5 illustrates a block diagram of an electronic switch according to one embodiment of the present disclosure.

FIG. 6 illustrates a block diagram of an electronic switch according to one embodiment of the present disclosure.

FIG. 7 illustrates a block diagram of an electronic switch according to one embodiment of the present disclosure.

Detailed Description

The electronic switch according to the present invention will be explained and explained in detail with reference to the drawings attached to the specification.

High power electronic switches can be implemented using low power electronic components in parallel. As shown in fig. 1, when the respective switching elements of the parallel-type electronic switch are arranged in a straight line, the distance difference between the respective switching elements to the input terminal 101, the output terminal 102, and the driving terminal 103 is large. The difference between the resistance and inductance of the base, collector and emitter of each switching element is large, resulting in unbalanced current and heat generation. The embodiment of the invention provides an electronic switch. The electronic switch is composed of a plurality of electronic switch elements which are connected in parallel. The plurality of electronic switching elements connected in parallel have a common input terminal, output terminal, and drive terminal. The plurality of electronic switch elements comprise a first plurality of electronic switch elements and a second plurality of electronic switch elements which are oppositely arranged, and the load values of the first appointed electronic switch element and the second appointed electronic switch element are the same, wherein the first appointed electronic switch element is an electronic switch element in the first plurality of electronic switch elements, the second appointed electronic switch element is an electronic switch element in the second plurality of electronic switch elements, and the first appointed electronic switch element and the second appointed electronic switch element are oppositely arranged. The difference between the resistance and the inductance of the base electrode, the collector electrode and the emitter electrode of each electronic switch element which are symmetrically arranged is smaller than that of the base electrode, the collector electrode and the emitter electrode of each electronic switch element which are arranged in a straight line, so that the problem of unbalanced current and heating can be effectively solved.

The resistance and inductance of the base, collector and emitter of each electronic switching element, which are symmetrically arranged, still differ. The current during switching also differs for each electronic switching element. In order to solve the above problem, an embodiment of the present invention provides an electronic switch, further including a substrate. The electronic switch elements are fixed on the upper surface of the substrate and distributed in a U shape. The input terminal is fixed at the bottom of the U-shape. The output terminal is fixed at the inner position of the U shape. The drive terminal is fixed at the position of the U-shaped opening. When the plurality of electronic switching elements is four, as shown in fig. 2, the electronic switch includes four electronic switching elements: k1 ', K2', K3 'and K4'. The electronic switch further comprises an input terminal 201, an output terminal 202 and a drive terminal 203. K1 'and K2' are arranged on one parallel side of the U-shape. K3 'and K4' are arranged on the other parallel side of the U shape. The bottom of the U-shape may not be provided with electronic switching elements. The input terminal 201 is fixed at the bottom center of the U-shape. The output terminal 202 is fixed at an inner center position of the U-shape. The drive terminal 203 is fixed at the center of the opening of the U-shape. The bases of the four electronic switching elements are connected to the drive terminal 203 by drive wires. The collectors of the four electronic switching elements are connected to the input terminal 201 through input wires. The emitters of the four electronic switching elements are connected to the output terminal 202 through output wires. The distances from the input terminal 201 to the K1 'and the K3' are equal, the equivalent resistances R1 'and R3' at the input terminal are equal, and the equivalent inductances L1 'and L3' at the input terminal are equal. K1 'and K3' are equidistant from the output terminal 202, the equivalent resistances of the output terminals are equal, and the equivalent inductances of the output terminals are equal. Therefore, the switching speeds of K1 'and K3' are the same. K2 'and K4' are equidistant from the input terminal 201. Similarly, the equivalent resistances at the input terminals of K2 'and K4' are equal, and the equivalent inductances at the input terminals are equal. K2 'and K4' are equidistant from the output terminal 202, the equivalent resistances of the output terminals are equal, and the equivalent inductances of the output terminals are equal. Therefore, the switching speeds of K2 'and K4' are the same. The distances from the K1 'and the K3' to the driving terminal 203 are equal, the equivalent resistance of the driving terminal is equal, the equivalent inductance of the driving terminal is equal, and the rising rate of the base current is equal. The distances from the K2 'and the K4' to the driving terminal 203 are equal, the equivalent resistance of the driving terminal is equal, the equivalent inductance of the driving terminal is equal, and the rising rate of the base current is equal. The driving speeds of K1 'and K3' are slower than those of K2 'and K4'. The opening speeds of K1 'and K3' are faster than those of K2 'and K4'. In the phase of fast and slow driving speed and fast and slow switching speed of each electronic switching element, the current of each electronic switching element during switching is nearly the same. The electronic switch elements can uniformly generate heat and have the same temperature by approaching the same current, and the derating use caused by inconsistent temperature can be avoided. Less electronic switching elements can be used for the same current, which is beneficial to reducing the cost.

Fig. 3 illustrates a block diagram of an electronic switch 300 according to an embodiment of the present disclosure. As shown in fig. 3, the plurality of electronic switching elements 301 is ten. The electronic switch 300 includes a substrate 302. Ten electronic switch elements 301 are fixed on the upper surface of the substrate 302 and uniformly distributed in a U-shape. The electronic switching element 301 may be a high power transistor, MOSFET, IGBT, etc. Four electronic switching elements 301 are arranged on two parallel sides of the U-shape, respectively. Preferably, the electronic switching elements 301 on two parallel sides of the U-shape are symmetrically arranged along the central axis of the U-shape. The bottom of the U-shape is provided with two electronic switching elements 301. Ten electronic switching elements 301 are press-fitted or soldered on the substrate 302. The input terminal 303 is fixed at the bottom center of the U-shape. The output terminal 304 is fixed at an inner center position of the U-shape. The drive terminal 305 is fixed at the center of the opening of the U-shape. The bases of the ten electronic switching elements 301 are connected to a drive terminal 305 by drive conductors. The collectors of the ten electronic switching elements 301 are connected to an input terminal 303 through an input wire. The emitters of the ten electronic switching elements 301 are connected to the output terminal 304 through output wires. Preferably, the drive conductors are arranged symmetrically along two parallel sides of the U-shape. The input conductors are symmetrically arranged along two parallel sides of the U-shape. In the phase of the fast and slow driving speed and the fast and slow switching speed of each electronic switching element 301 having the U-shaped distribution, the current of each electronic switching element 301 during switching is nearly the same.

The electronic components inevitably generate heat in the switching process and the conducting process, the heat is rapidly conducted out, and the low-temperature operation of the switching device is also an indispensable means for ensuring the service life of the device. Fig. 4 illustrates a block diagram of an electronic switch 400 according to an embodiment of the present disclosure. As shown in fig. 4, the electronic switch 400 includes a housing 406, an input terminal 403, an output terminal 404, a substrate 402, and a control terminal 405. The input terminal 403, the output terminal 404, the substrate 402, and the housing 406 are fixedly connected by bolts. Preferably, the input terminal 403 and the output terminal 404 are provided with two or more mounting holes, respectively. The screws 409 press the substrate 402 against the housing 406 through the mounting holes, so that the lower surface of the substrate 402 is attached to the housing 406, thereby reducing the thermal resistance between the substrate 402 and the housing 406 and rapidly guiding heat inevitably generated by the electronic switching element 401 to the housing 406. The die temperature of the electronic switching element 401 is further reduced and the same number of elements can pass a larger current, which can improve economy. Preferably, screws 409 are provided on the bases of the input and output terminals.

The embodiment of the invention also provides an electronic switch. As shown in fig. 5, the electronic switch includes two electronic switches 300 shown in fig. 3 connected in series. The collector of one electronic switch 300 and the emitter of the other electronic switch 300 are connected to form a half bridge arm. The electronic switch also has the advantage of uniform heating.

The embodiment of the invention also provides an electronic switch. As shown in fig. 6, the electronic switch includes two electronic switches shown in fig. 5 connected in parallel. The electronic switch also has the advantage of uniform heating.

The embodiment of the invention also provides an electronic switch. As shown in fig. 7, the electronic switch includes three electronic switches shown in fig. 5 connected in parallel. The electronic switch also has the advantage of uniform heating.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.