CN215452801U - High-efficient rectification suppression device for new energy automobile - Google Patents

Abstract

The utility model relates to a high-efficiency rectification suppression device for a new energy automobile, which comprises an input rectification assembly, an inversion assembly and an output rectification assembly which are sequentially connected, wherein the input rectification assembly comprises a direct current conducting plate, a first rectifier, a second rectifier, a third rectifier, a fourth rectifier, a fifth rectifier, a grounding unit and a rectification base for supporting the whole input rectification assembly, the output rectification assembly comprises an alternating current rectification base, an alternating current rectifier and a detector, the alternating current rectification base is coated with an alternating current conducting plate, the input end of the alternating current conducting plate is electrically connected with the output end of the inversion assembly, the alternating current rectifier is sleeved on the outer side of the alternating current conducting plate, and the detector is electrically connected with the output end of the alternating current conducting plate. Compared with the prior art, the utility model adds a rectification link at the input end and the output end of the inversion component, and has the advantages of strong noise interference resistance, good shaft current suppression effect, high integration level, convenient disassembly and maintenance and the like.

Description

High-efficient rectification suppression device for new energy automobile

Technical Field

The utility model relates to the field of rectification inversion devices for automobiles, in particular to a high-efficiency rectification suppression device for a new energy automobile.

Background

With the continuous development of the new energy automobile industry, the requirements on the electric drive system of the new energy automobile are higher and higher, the motor and the inverter are used as two key core parts of the electric automobile, and the service reliability and the service life of the motor and the inverter determine the service life and the functional performance of the electric automobile. The motor and the inverter on the traditional electric automobile are fixedly installed by adopting a separated structure, namely, the motor and the inverter are connected by adopting a relatively long high-voltage wire harness, the scheme is gradually replaced by a high-integration scheme due to the complex structure and higher cost, namely, the motor and the inverter are subjected to integrated design, and the three-phase output of the inverter directly enters the motor to be connected with three input ends. Although the scheme design solves the problems of structural integration and cost, because the alternating current output of the inverter is high-frequency alternating current with variable frequency, because the inverter is closer to a bearing at the input end of the motor, the inverter generates voltage difference in three-phase output after PWM variable frequency transformation, the harmonic wave of the voltage difference is transmitted into a stator winding of the motor to generate electromagnetic induction, a common-mode loop is formed by the harmonic wave of the voltage difference and a capacitor distributed in the motor, and the voltage difference can generate a ground current, also called a shaft current, on a rotating shaft of the motor. The shaft current forms a loop through a motor shaft, a bearing, a stator casing and the like, the motor shaft generates a voltage difference along with the current flow, the voltage difference is also called as shaft voltage, once the shaft voltage is too large, an oil film of a bearing inner ring can be broken down to generate the shaft current, the shaft current can instantly release high temperature to melt the outer surface of the bearing inner ring or the shaft to form ablation, and then the motor generates serious vibration and noise to influence the performance of the whole vehicle. The existing motor and inverter integration scheme has the advantages that the rectification effect of the input end is common, only two rectification links are simply added, and the distillation structure of the output end is not designed completely, so that alternating current after frequency conversion enters the interior of the motor without any shielding and rectification, and the shaft current corrosion phenomenon is easily generated. The integrated electric driving schemes matched with the current market basically have no good device for inhibiting the generation of shaft current. Therefore, at present, a high-efficiency rectification inverter device capable of meeting the requirement of using a new energy automobile needs to be designed urgently, so that the problem of shaft current corrosion of a motor can be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect that the current corrosion of a motor shaft is easily caused in the prior art, and provides a high-efficiency rectification suppression device for a new energy automobile.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a high-efficient rectification suppression device for new energy automobile, is including the input rectification subassembly, contravariant subassembly and the output rectification subassembly that connect gradually, the output rectification subassembly includes alternating current rectifier seat, alternating current rectifier and detector, alternating current rectifier seat cladding has alternating current conducting plate, this alternating current conducting plate's input electrical connection the output of contravariant subassembly, the alternating current rectifier cover is established the outside of alternating current conducting plate, detector electrical connection the output of alternating current conducting plate.

Furthermore, the input rectification assembly comprises a direct current conducting plate, a first rectifier, a second rectifier, a third rectifier, a fourth rectifier, a fifth rectifier, a grounding unit and a rectification seat supporting the whole input rectification assembly, the direct current conducting plate penetrates through the centers of the second rectifier and the fourth rectifier, positive pins and negative pins of the first rectifier, the third rectifier and the fifth rectifier are electrically connected with positive ends and negative ends of the direct current conducting plate respectively, and grounding pins of the first rectifier, the third rectifier and the fifth rectifier are electrically connected with the grounding unit.

Furthermore, the rectifier base is provided with a first placing space, a second placing space, a third placing space, a fourth placing space and a fifth placing space, and the first rectifier, the second rectifier, the third rectifier, the fourth rectifier and the fifth rectifier are respectively fixed in the first placing space, the second placing space, the third placing space, the fourth placing space and the fifth placing space.

Furthermore, the first placing space, the third placing space and the fifth placing space are rectangular structures arranged in pairs, and the second placing space and the fourth placing space are independent rectangular cavity structures.

Furthermore, the grounding unit comprises a first conductive floor and a second conductive floor, a grounding pin of the rectifier is electrically connected with the first conductive floor, and positive and negative pins of the three rectifiers and the five rectifiers are electrically connected with the second conductive floor.

Furthermore, the contravariant subassembly includes PCB board, clamp plate, power device, mounting panel and the electric capacity that from the top down arranges in proper order, the input of electric capacity is connected the output electrical connection of input rectification subassembly, the output of electric capacity with power device electrical connection, the output of power device with output rectification subassembly electrical connection.

Further, be provided with boss and first through-hole in the middle of the mounting panel, be provided with a plurality of heavy grooves in the middle of the boss, power device installs on a plurality of heavy grooves, the boss both sides are provided with inhalant canal and exhalant canal respectively, the bottom front end in a plurality of heavy grooves all communicates with inhalant canal intercommunication, bottom rear end all communicates with exhalant canal.

Furthermore, the both sides of boss all are equipped with a plurality of high cylinders, support fixedly the PCB board, the both sides in a plurality of heavy grooves all are equipped with a plurality of short cylinders, support fixedly the clamp plate.

Furthermore, a groove is formed in the rear end of the alternating current rectifying base, and the alternating current conducting plate penetrates out of the middle of the groove.

Furthermore, the alternating current rectifier is provided with a plurality of second through holes for the alternating current conducting plates to extend into, and the alternating current rectifier is made of a soft magnetic material metal powder material.

Compared with the prior art, the utility model has the following advantages:

(1) according to the utility model, the alternating current rectifier is added in the output rectifying assembly, and the material of the alternating current rectifier is metal powder of soft magnetic material through compression molding, so that the current at the input end and the current at the output end can be well shielded and rectified, the current at the input end can be well purified, the voltage difference at the alternating current output end can be well balanced, and the shaft current generated after entering the motor and the corrosion to the motor can be prevented.

(2) According to the utility model, on the premise of not increasing the volume by optimizing the structural design, the core electrical components in the inverter are integrated and modularized by the fasteners, the PCB, the pressing plate, the power device and the capacitor which are sequentially arranged from top to bottom of the inverter assembly are all installed and fixed on the installation plate to form a complete assembly, and in addition, the input rectification assembly is supported on the rectification seat to fix the direct current conducting plate, the first rectifier, the second rectifier, the third rectifier, the fourth rectifier, the fifth rectifier, the first guide floor and the second guide floor, and also forms a modularized input rectification assembly, so that the structure is compact and integrated; the output rectifying component integrates an alternating current rectifying base, an alternating current rectifier and a detector at the same time, a complete integrated rectifying link is also formed, the whole rectifying and inverting device is composed of the three modularized integrated components, and the rectifier is compact in size, high in integration level, convenient to install, disassemble and maintain.

(3) The input rectifying component designed by the utility model integrates a first rectifier, a second rectifier, a third rectifier, a fourth rectifier and a fifth rectifier, current input from the battery end of the electric automobile is rectified, filtered and absorbed layer by layer before entering the inverter component, and links which seriously affect the noise performance of the system, such as harmonic waves, clutter and the like, can be prevented from entering the inverter component, so that the current input by the whole inverter component is purer. The output rectifying component designed by the utility model is additionally provided with the alternating current rectifier, the current flowing into the input rectifying component is relatively pure, although noise waves can be generated through the frequency conversion and voltage transformation of the inverter component, the noise waves can be absorbed and blocked by the addition of the alternating current rectifier to prevent the noise waves from entering the motor, so that the voltage difference between the alternating current output currents is approximately zero, the voltage difference cannot be formed in the motor, the shaft current cannot be formed on the motor shaft, the electric corrosion cannot be formed on the bearing, the NVH (noise vibration, noise and vibration) performance of the whole system can be continuously kept in the best state, and the noise suppression effect is relatively obvious.

(4) The two-channel rectifier and the four-channel rectifier at the input end and the alternating current rectifier at the output end are made of metal powder of soft magnetic materials through compression molding, the current at the input end and the current at the output end can be well shielded and rectified, the current at the input end can be well purified, the voltage difference at the alternating current output end can be well balanced, the shaft current generated after entering the motor can be prevented from corroding the motor, and therefore the shaft current is remarkably inhibited by carrying out closed rectification shielding on the input end and the output end.

Drawings

Fig. 1 is a schematic perspective view of a rectification inverter according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an input rectifying component according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an inverter assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an output rectifying component according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rectifying base of an input rectifying assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mounting plate of an inverter assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an ac rectifying socket of an output rectifying assembly according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an ac rectifier of an output rectifying assembly according to an embodiment of the present invention;

in the figure, 1, an input rectifying assembly, 2, an inverter assembly, 3, an output rectifying assembly, 1-1, a rectifying base, 1-1-1, a first placing space, 1-1-2, a second placing space, 1-1-3, a third placing space, 1-1-4, a fourth placing space, 1-1-5, a fifth placing space, 1-2, a direct current conducting plate, 1-3, a first rectifier, 1-4, a second rectifier, 1-5, a third rectifier, 1-6, a fourth rectifier, 1-7, a fifth rectifier, 1-8, a first conducting plate, 1-9, a second conducting plate, 2, an inverter assembly, 2-1, a PCB (printed circuit board), 2-2, a pressing plate, 2-3, a power device, 2-4, The device comprises a mounting plate, 2-4-1 parts of a boss, 2-4-2 parts of a through hole, 2-4-3 parts of a sink, 2-4-4 parts of a water inlet channel, 2-4-5 parts of a water outlet channel, 2-4-6 parts of a high cylinder, 2-4-7 parts of a low cylinder, 2-5 parts of a capacitor, 3 parts of an output rectifying assembly, 3-1 parts of an alternating current rectifying base, 3-2 parts of an alternating current rectifier, 3-1-1 parts of an alternating current conducting plate, 3-1-2 parts of a groove, 3-3 parts of a detector.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Example 1

As shown in fig. 1, the embodiment provides a high-efficiency rectification suppression device for a new energy automobile, which includes an input rectification assembly 1, an inverter assembly 2 and an output rectification assembly 3 that are connected in sequence, where the output rectification assembly 3 includes an ac rectification base 3-1, an ac rectifier 3-2 and a detector 3-3, the ac rectification base 3-1 is wrapped with an ac conductive plate 3-1-1, an input end of the ac conductive plate 3-1-1 is electrically connected to an output end of the inverter assembly 2, the ac rectifier 3-2 is sleeved on an outer side of the ac conductive plate 3-1-1, and the detector 3-3 is electrically connected to an output end of the ac conductive plate 3-1-1.

Specifically, in this embodiment, the output rectifying assembly 3 includes an ac rectifying base 3-1, an ac rectifier 3-2 and a detector 3-3, the ac rectifying base 3-1 is fixed on the upper surface of the pressing plate 2-2, and an ac conductive plate 3-1-1 is integrally wrapped and molded inside the ac rectifying base 3-1, an input end of the ac conductive plate 3-1-1 is electrically connected with an output end of the power device 2-3 of the inverter assembly 2, the ac rectifier 3-2 penetrates through the ac conductive plate 3-1-1 and is fixed at the rear end of the ac rectifying base 3-1 in an encapsulating manner, and the detector 3-3 is fixed on the bottom surface of the pressing plate 2-2 of the inverter assembly 2, and the center of the detector is sleeved on an output end of the ac conductive plate 3-1-1 of the ac rectifying base 3-1.

As shown in fig. 7, which is a schematic structural diagram of the ac rectifying base of the output rectifying assembly of this embodiment, the rear end of the ac rectifying base 3-1 has a rectangular groove 3-1-2 with a depth of 11mm, and the ac conducting plate 3-1-1 penetrates through the middle of the groove 3-1-2.

As shown in fig. 8, which is a schematic structural diagram of the input rectifying assembly of this embodiment, the ac rectifier 3-2 is a rectangular structure, the center of the ac rectifier has three rectangular through holes arranged side by side, and the ac rectifier 3-2 is made of soft magnetic metal powder through press molding, so as to shield and rectify the ac output current well, balance the voltage difference of the ac output well, and prevent the motor from being corroded by the shaft current generated after entering the motor.

In this embodiment, the input end of the input rectifying component 1 is electrically connected to the output cable of the high-voltage battery of the electric vehicle, the output end of the input rectifying component is electrically connected to the input end of the inverter component 2, the output end of the output rectifying component 3 is electrically connected to the ac input end of the motor, and the input end of the output rectifying component is electrically connected to the output end of the inverter component 2.

The input rectification component 1 and the inversion component 2 may be implemented by conventional input arrangement components and inversion components, and in order to improve the filtering performance of the input rectification component 1, a preferred embodiment of the input rectification component 1 is described below.

The input rectification assembly 1 comprises direct current conducting plates 1-2, one rectifier 1-3, two rectifiers 1-4, three rectifiers 1-5, four rectifiers 1-6, five rectifiers 1-7, a grounding unit and a rectification base 1-1 supporting the whole input rectification assembly 1, wherein the direct current conducting plates 1-2 penetrate through the centers of the two rectifiers 1-4 and the four rectifiers 1-6, positive and negative pins of the one rectifier 1-3, the three rectifiers 1-5 and the five rectifiers 1-7 are respectively and electrically connected with positive and negative ends of the direct current conducting plates 1-2, and grounding pins of the one rectifier 1-3, the three rectifiers 1-5 and the five rectifiers 1-7 are electrically connected with the grounding unit.

In order to arrange the grounding unit reasonably, as a preferred embodiment, the grounding unit comprises a first conductive floor plate 1-8 and a second conductive floor plate 1-9, a grounding pin of one rectifier 1-3 is electrically connected with the first conductive floor plate 1-8, and positive and negative pins of three rectifiers 1-5 and five rectifiers 1-7 are electrically connected with the second conductive floor plate 1-9.

In this embodiment, the specific implementation structure of the input rectifying component 1 is as follows:

as shown in fig. 2, which is a schematic structural diagram of the input rectifying assembly of this embodiment, the input rectifying assembly 1 includes a rectifying base 1-1, and a dc conducting plate 1-2, a first rectifier 1-3, a second rectifier 1-4, a third rectifier 1-5, a fourth rectifier 1-6, a fifth rectifier 1-7, a first ground guiding plate 1-8, and a second ground guiding plate 1-9 fixed thereon, the first ground guiding plate 1-8 and the second ground guiding plate 1-9 are respectively connected with the fixing legs of the rectifying base 1-1 and fixed by bolts and connected with the ground, the first, third and fifth rectifiers are connected in parallel, and respectively fixed on two sides of the rectifying base 1-1 by potting, the second rectifier 1-4 and the fourth rectifier 1-6 are fixed on the rectifying base 1-1 by potting, the two rectifiers 1-4 are arranged between the one rectifier 1-3 and the three rectifiers 1-5, the four rectifiers 1-6 are arranged between the three rectifiers 1-5 and the five rectifiers 1-7, the direct current conducting plate 1-2 penetrates through the whole rectifier base 1-1 from the front end to the rear end, and passes through the centers of the two rectifiers 1-4 and the four rectifiers 1-6, positive pins and negative pins of the one rectifier 1-3, the three rectifiers 1-5 and the five rectifiers 1-7 are respectively and electrically connected with positive ends and negative ends of the direct current conducting plates 1-2, grounding pins of the one rectifier 1-3 are electrically connected with the first conducting floor 1-8, and grounding pins of the three rectifiers 1-5 and the five rectifiers 1-7 are electrically connected with the second conducting floor 1-9.

In order to reduce the volume of the fairing base 1-1, as a preferred embodiment, the fairing base 1-1 is provided with a first placing space 1-1-1, a second placing space 1-1-2, a third placing space 1-1-3, a fourth placing space 1-1-4 and a fifth placing space 1-1-5, the first rectifier 1-3, the second rectifier 1-4, the third rectifier 1-5, the fourth rectifier 1-6 and the fifth rectifier 1-7 are respectively fixed in the first placing space 1-1-1, the second placing space 1-1-2, the third placing space 1-1-3, the fourth placing space 1-1-4 and the fifth placing space 1-1-5.

In this embodiment, the specific implementation structure of the rectifying seat 1-1 is as follows:

as shown in fig. 5, which is a schematic view of a structure of a rectifying base of the input rectifying assembly of this embodiment, a rectifying base 1-1 is provided with a first placing space 1-1-1, a second placing space 1-1-2, a third placing space 1-1-3, a fourth placing space 1-1-4 and a fifth placing space 1-1-5, the first rectifier 1-3, the second rectifier 1-4, the third rectifier 1-5, the fourth rectifier 1-6 and the fifth rectifier 1-7 are respectively encapsulated and fixed in the first placing space 1-1-1, the second placing space 1-1-2, the third placing space 1-1-3, the fourth placing space 1-1-4 and the fifth placing space 1-1-5 by glue. The first placing space 1-1-1, the third placing space 1-1-3 and the fifth placing space 1-1-5 are all arranged in pairs in a rectangular structure, the second placing space 1-1-2 is positioned between the first placing space 1-1-1 and the third placing space 1-1-3 and is a rectangular cavity structure, and the fourth placing space 1-1-4 is positioned between the third placing space 1-1-3 and the fifth placing space 1-1-5 and is also a rectangular cavity structure.

As a preferred embodiment, the inversion component 2 comprises a PCB (printed Circuit Board) 2-1, a pressing plate 2-2, a power device 2-3, a mounting plate 2-4 and a capacitor 2-5 which are sequentially arranged from top to bottom, wherein the input end of the capacitor 2-5 is electrically connected with the output end of the input rectification component 1, the output end of the capacitor 2-5 is electrically connected with the power device 2-3, and the output end of the power device 2-3 is electrically connected with the output rectification component 3.

In this embodiment, the inverter module 2 has the following specific implementation structure:

as shown in fig. 3, which is a schematic structural diagram of the inverter assembly of this embodiment, the inverter assembly 2 includes a PCB 2-1, a pressing plate 2-2, a power device 2-3, a mounting plate 2-4, and a capacitor 2-5, which are sequentially arranged from top to bottom, the capacitor 2-5 is fixed on the bottom surface of the mounting plate 2-4, the power device 2-3 is fixed at a middle position right above the mounting plate 2-4, the pressing plate 2-2 is fixed on the mounting plate 2-4 and compresses the power device 2-3, an input end of the capacitor 2-5 is electrically connected with an output end of a dc conductive plate 1-2 of an input rectifier assembly 1, an output end of the capacitor 2-5 is electrically connected with the power device 2-3, an output end of the power device 2-3 is electrically connected with the output rectifier assembly 3, the PCB 2-1 is fixed on the mounting plate 2-4, and is disposed over the power device 2-3 and the platen 2-2.

In order to improve the heat dissipation performance of the inverter assembly 2, as a preferred embodiment, a boss 2-4-1 and a first through hole 2-4-2 are arranged in the middle of the mounting plate 2-4, a plurality of sinking grooves 2-4-3 are arranged in the middle of the boss 2-4-1, the power device 2-3 is mounted on the plurality of sinking grooves 2-4-3, a water inlet channel 2-4-4 and a water outlet channel 2-4-5 are respectively arranged on two sides of the boss 2-4-1, the front ends of the bottoms of the plurality of sinking grooves 2-4-3 are all communicated with the water inlet channel 2-4-4, and the rear ends of the bottoms of the plurality of sinking grooves 2-4-3 are all communicated with the water outlet channel 2-4-5.

In order to conveniently support the PCB 2-1 and the pressing plate 2-2, as a preferred embodiment, a plurality of high cylinders are arranged on both sides of the boss 2-4-1 to support and fix the PCB 2-1, and a plurality of short cylinders are arranged on both sides of the plurality of sinking grooves 2-4-3 to support and fix the pressing plate 2-2.

In this embodiment, the specific implementation structure of the mounting plates 2 to 4 is as follows:

as shown in fig. 6, which is a schematic view of the mounting plate structure of the inverter assembly of this embodiment, a boss 2-4-1 and a rectangular through hole 2-4-2 are disposed in the middle of the mounting plate 2-4, three rectangular sinks 2-4-3 are disposed in the middle of the boss 2-4-1, a water inlet channel 2-4-4 and a water outlet channel 2-4-5 are disposed on two sides of the boss 2-4-1, the front ends of the bottoms of the three rectangular sinks 2-4-3 are all communicated with the water inlet channel 2-4-4, and the rear ends of the bottoms are all communicated with the water outlet channel 2-4-5, so that when the power device 2-3 operates, the cooling liquid first flows from the water inlet channel 2-4-4, and then flows into the sinks 2-4-3 from the front ends of the bottoms of the three rectangular sinks 2-4-3 in parallel, and the three power devices 2-3 are cooled and cooled, and finally the three power devices converge into the water outlet channel 2-4-5 from the rear end of the bottom of the rectangular sink groove 2-4-3 to flow out, so that the whole power device 2-3 is cooled and cooled. The two sides of the boss 2-4-1 are uniformly provided with 10 high cylinders 2-4-6 which are arranged in parallel and divided into two groups, the high cylinders 2-4-6 are used for supporting and fixing the PCB 2-1, the left side and the right side of the three rectangular sinking grooves 2-4-3 are respectively provided with two short cylinders 2-4-7, the total number of 8 short cylinders are arranged in parallel and divided into two rows, and the short cylinders 2-4-7 are used for fixing and supporting the pressing plate 2-2.

By arbitrarily combining the above preferred embodiments, a more preferred embodiment can be obtained. The following describes a preferred embodiment of the process.

According to the embodiment, firstly, core electrical parts in the inverter are integrated and modularized through a fastener on the premise of not increasing the size through optimizing the structural design, and the PCB 2-1, the pressing plate 2-2, the power device 2-3 and the capacitor 2-5 which are sequentially arranged on the inverter component 2 from top to bottom are all installed and fixed on the installation plate 2-4 to form a complete component, so that the inverter component is convenient to disassemble and compact in size; the input rectification component 1 is supported on a rectification seat 1-1 to fix a direct current conducting plate 1-2, a first rectifier 2-3, a second rectifier 1-4, a third rectifier 1-5, a fourth rectifier 1-6, a fifth rectifier 1-7, a first guide floor 1-8 and a second guide floor 1-9, and also forms a modular input rectification component 1, which is compact and integrated in structure; the output rectifying component 3 integrates an alternating current rectifying base 3-1, an alternating current rectifier 3-2 and a detector 3-3 at the same time, and also forms a complete integrated rectifying link. The whole rectification inverter is composed of the three modularized integrated components, and is high in integration level and convenient to install, disassemble and maintain. In addition, the input rectification component 1 designed by the utility model integrates a first rectifier 2-3, a second rectifier 1-4, a third rectifier 1-5, a fourth rectifier 1-6 and a fifth rectifier 1-7, current input from the battery end of the electric automobile is rectified, filtered and absorbed layer by layer before entering the inversion component 2, and links which seriously affect the system noise performance such as some harmonic waves and clutter can be prevented from entering, so that the current input into the whole inversion component 2 is purer. The alternating current rectifier 3-2 is additionally arranged on the output rectifying component 3 designed by the utility model, the current flowing into the input rectifying component 1 is relatively pure, although some noise waves can be generated through the frequency conversion and voltage transformation of the inverter component 2, the noise waves generated can be absorbed and blocked to prevent the noise waves from entering the motor because the alternating current rectifier 3-2 is additionally arranged, so that the voltage difference between alternating current output currents is approximately zero, the voltage difference cannot be formed in the motor, the shaft current cannot be formed on the motor shaft, the electric corrosion cannot be formed on the bearing, the NVH performances of the whole system such as vibration noise and the like can be continuously kept in the best state, and the noise suppression effect is relatively obvious.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The efficient rectification suppression device for the new energy automobile is characterized by comprising an input rectification component (1), an inverter component (2) and an output rectification component (3) which are sequentially connected, the output rectifying assembly (3) comprises an alternating current rectifying base (3-1), an alternating current rectifier (3-2) and a detector (3-3), the alternating current rectifying base (3-1) is coated with an alternating current conducting plate (3-1-1), the input end of the alternating current conducting plate (3-1-1) is electrically connected with the output end of the inversion component (2), the alternating current rectifier (3-2) is sleeved on the outer side of the alternating current conducting plate (3-1-1), the detector (3-3) is electrically connected with the output end of the alternating current conducting plate (3-1-1).

2. The efficient rectification suppression device for the new energy automobile according to claim 1, wherein the input rectification assembly (1) comprises direct current conducting plates (1-2), one rectifier (1-3), two rectifiers (1-4), three rectifiers (1-5), four rectifiers (1-6), five rectifiers (1-7), a grounding unit and a rectification base (1-1) supporting the whole input rectification assembly (1), the direct current conducting plates (1-2) penetrate through centers of the two rectifiers (1-4) and the four rectifiers (1-6), positive pins and negative pins of the one rectifier (1-3), the three rectifiers (1-5) and the five rectifiers (1-7) are respectively and electrically connected with positive ends and negative ends of the direct current conducting plates (1-2), and the grounding pins of the first rectifier (1-3), the third rectifier (1-5) and the fifth rectifier (1-7) are electrically connected with the grounding unit.

3. The efficient rectification suppression device for the new energy automobile as claimed in claim 2, wherein the rectification base (1-1) is provided with a first placement space (1-1-1), a second placement space (1-1-2), a third placement space (1-1-3), a fourth placement space (1-1-4) and a fifth placement space (1-1-5), and the first rectifier (1-3), the second rectifier (1-4), the third rectifier (1-5), the fourth rectifier (1-6) and the fifth rectifier (1-7) are respectively fixed in the first placement space (1-1-1), the second placement space (1-1-2), the third placement space (1-1-3), and, A fourth placing space (1-1-4) and a fifth placing space (1-1-5).

4. The efficient rectification suppression device for the new energy automobile as claimed in claim 3, wherein the first placement space (1-1-1), the third placement space (1-1-3) and the fifth placement space (1-1-5) are rectangular structures arranged in pairs, and the second placement space (1-1-2) and the fourth placement space (1-1-4) are rectangular cavity structures.

5. The efficient rectification suppression device for the new energy automobile as claimed in claim 2, wherein the grounding unit comprises a first conductive floor plate (1-8) and a second conductive floor plate (1-9), the grounding pin of the rectifier (1-3) is electrically connected with the first conductive floor plate (1-8), and the positive and negative pins of the rectifier (1-5) and the rectifier (1-7) are electrically connected with the second conductive floor plate (1-9).

6. The efficient rectification suppression device for the new energy automobile as claimed in claim 1, wherein the inverter assembly (2) comprises a PCB (2-1), a pressing plate (2-2), a power device (2-3), a mounting plate (2-4) and a capacitor (2-5) which are sequentially arranged from top to bottom, an input end of the capacitor (2-5) is electrically connected with an output end of the input rectification assembly (1), an output end of the capacitor (2-5) is electrically connected with the power device (2-3), and an output end of the power device (2-3) is electrically connected with the output rectification assembly (3).

7. The efficient rectification suppression device for the new energy automobile according to claim 6, a boss (2-4-1) and a first through hole (2-4-2) are arranged in the middle of the mounting plate (2-4), a plurality of sinking grooves (2-4-3) are arranged in the middle of the boss (2-4-1), the power device (2-3) is arranged on the sinking grooves (2-4-3), the two sides of the boss (2-4-1) are respectively provided with a water inlet channel (2-4-4) and a water outlet channel (2-4-5), the front ends of the bottoms of the plurality of sinking grooves (2-4-3) are communicated with the water inlet channel (2-4-4), and the rear ends of the bottoms are communicated with the water outlet channel (2-4-5).

8. The efficient rectification suppression device for the new energy automobile as claimed in claim 7, wherein a plurality of high cylinders are arranged on both sides of the boss (2-4-1) to support and fix the PCB board (2-1), and a plurality of low cylinders are arranged on both sides of the plurality of sinking grooves (2-4-3) to support and fix the pressing plate (2-2).

9. The efficient rectification suppression device for the new energy automobile as claimed in claim 1, wherein a groove (3-1-2) is formed in the rear end of the alternating current rectification base (3-1), and the alternating current conducting plate (3-1-1) penetrates out of the middle of the groove (3-1-2).

10. The efficient rectification suppression device for the new energy automobile as claimed in claim 1, wherein the ac rectifier (3-2) is provided with a plurality of second through holes for the ac conductive plates (3-1-1) to extend through, and the material of the ac rectifier (3-2) is a metal powder material of a soft magnetic material.

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