Three-phase fixed seat structure with disconnection protection function, motor controller and vehicle

Abstract

The utility model provides a three -phase fixed seat structure with disconnect protection function, motor controller and vehicle belong to three -phase copper row fixed seat technical field, three -phase fixed seat structure with disconnect protection function, including three -phase fixed seat, three -phase fixed seat has integrated three -phase copper row, disconnect protection mechanism includes casing, the first copper row for being used to form the intercommunication loop with V phase copper row in three -phase copper row of being arranged on the casing, the second copper row for being used to form the intercommunication loop with W phase copper row in three -phase copper row of being arranged on the casing and the circuit breaker mechanism that can be in the first copper row and / or second copper row of circuit abnormal cut -out of being arranged in the casing, the utility model discloses a circuit disconnect protection mechanism is arranged in three -phase alternating -current side, when the circuit appears abnormal large current, disconnect protection mechanism in extremely short time through the circuit breaker mechanism inside action fast cut -out high -voltage circuit, prevents the risk such as controller burnout, vehicle out of control caused by vehicle collision, short circuit or thermal runaway.

Description

Technical Field

[0001] This utility model relates to the technical field of three-phase copper busbar fixing bases, specifically to a three-phase fixing base structure with disconnection protection function, a motor controller, and a vehicle. Background Technology

[0002] In the motor controller of new energy vehicles, the three-phase copper busbar mount is a core component. The DC current from the vehicle battery is converted into three-phase AC current by an inverter bridge composed of IGBTs or other power semiconductors. This three-phase AC current then reaches the motor through the three-phase copper busbar. The general design approach for the three-phase copper busbar is to integrally mold the U, V, and W phases into a three-phase mount using injection molding. One end of the mount connects to the IGBT or other power semiconductor terminals, and the other end connects to the motor winding terminals, ultimately achieving the three-phase AC power transmission function.

[0003] Traditional technical solutions lack a disconnecting fuse mechanism on the three-phase copper busbars. When a vehicle collides or the motor control IGBT or SiC module experiences a short circuit fault for some reason, if the vehicle is being towed or running, the motor will rotate. The reverse electromotive force of the motor will generate current on the three-phase AC side, causing thermal runaway of the electronic control system. In extreme cases, the motor may burn out. Utility Model Content

[0004] This utility model provides a three-phase fixed base structure with disconnection protection function, a motor controller and a vehicle. By setting a circuit disconnection protection mechanism on the three-phase AC side, when an abnormally large current occurs in the circuit, the disconnection protection mechanism quickly cuts off the high-voltage circuit by pushing the internal circuit breaking mechanism in a very short time, preventing risks such as controller burnout and vehicle loss of control caused by vehicle collision, short circuit or thermal runaway.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A three-phase mounting bracket structure with disconnection protection function includes:

[0007] Three-phase mounting base, wherein a three-phase copper busbar is integrated on the three-phase mounting base;

[0008] The disconnection protection mechanism includes a housing, a first copper busbar disposed on the housing for forming a connection loop with the V-phase copper busbar in the three-phase copper busbar, a second copper busbar disposed on the housing for forming a connection loop with the W-phase copper busbar in the three-phase copper busbar, and a circuit breaking mechanism disposed inside the housing capable of disconnecting the first copper busbar and / or the second copper busbar in case of circuit malfunction.

[0009] Preferably, the three-phase mounting base has an installation groove on its inner side for installing the disconnection protection mechanism.

[0010] Preferably, the V-phase copper busbar includes a first V-phase copper busbar and a second V-phase copper busbar; the first V-phase copper busbar includes a first V-phase copper busbar input terminal disposed on a three-phase fixed base and a first V-phase copper busbar output terminal disposed inside the mounting groove;

[0011] The second V-phase copper busbar includes a second V-phase copper busbar input terminal disposed inside the mounting slot and a second V-phase copper busbar output terminal disposed on the three-phase fixed base;

[0012] The first copper busbar includes a first copper busbar input terminal disposed on one side of the housing and electrically connected to the output terminal of the first V-phase copper busbar, and a first copper busbar output terminal electrically connected to the input terminal of the second V-phase copper busbar.

[0013] Preferably, the W-phase copper busbar includes a first W-phase copper busbar and a second W-phase copper busbar; the first W-phase copper busbar includes a first W-phase copper busbar input terminal disposed on a three-phase fixed base and a first W-phase copper busbar output terminal disposed inside the mounting groove;

[0014] The second W-phase copper busbar includes a second W-phase copper busbar input terminal disposed inside the mounting slot and a second W-phase copper busbar output terminal disposed on the three-phase fixed base;

[0015] The second copper busbar includes a second copper busbar input terminal disposed on the other side of the housing and electrically connected to the output terminal of the first W-phase copper busbar, and a second copper busbar output terminal electrically connected to the input terminal of the second W-phase copper busbar.

[0016] Preferably, the three-phase fixed base structure with disconnection protection function further includes a BOOST boost positive copper busbar, which includes a BOOST boost positive copper busbar input terminal located on one long side of the three-phase fixed base and a BOOST boost positive copper busbar output terminal located on the other long side of the three-phase fixed base.

[0017] Preferably, the inner wall of one side of the mounting groove is provided with a first copper busbar isolation barrier, and the inner wall of the other side is provided with a second copper busbar isolation barrier.

[0018] Preferably, a plurality of current sensor magnetic cores are provided on one long side of the three-phase mounting base.

[0019] Preferably, a filter magnetic ring is provided on the other long side of the three-phase fixed base.

[0020] A motor controller includes the aforementioned three-phase fixed base structure with disconnection protection function.

[0021] A vehicle including the aforementioned motor controller.

[0022] As can be seen from the above technical solution, the present invention has the following beneficial effects: In the present invention, the first V-phase copper busbar, the second V-phase copper busbar and the first copper busbar in the disconnection protection mechanism are combined to form a V-phase circuit path; the first W-phase copper busbar, the second W-phase copper busbar and the second copper busbar in the disconnection protection mechanism are combined to form a W-phase circuit path. When an abnormally large current occurs in the circuit, the disconnection protection mechanism cuts off the first copper busbar and the second copper busbar in a very short time by pushing the internal circuit breaking mechanism, that is, it cuts off the V-phase and W-phase circuit loops between the motor control IGBT or SiC module and the motor, protecting the motor controller and the motor from being burned out. Attached Figure Description

[0023] Figure 1 A schematic diagram of the three-phase fixed base structure with disconnection protection function provided by this utility model;

[0024] Figure 2 Exploded view of the three-phase fixed base structure with disconnection protection function provided by this utility model;

[0025] Figure 3 This is a schematic diagram of the three-phase fixed base.

[0026] In the diagram: 10. Three-phase mounting base; 11. Mounting slot; 110. U-phase copper busbar; 111. U-phase copper busbar input terminal; 112. U-phase copper busbar output terminal; 120. First V-phase copper busbar; 121. First V-phase copper busbar input terminal; 122. First V-phase copper busbar output terminal; 130. Second V-phase copper busbar; 131. Second V-phase copper busbar input terminal; 132. Second V-phase copper busbar output terminal; 140. First W-phase copper busbar; 141. First W-phase copper busbar input terminal; 142. First W-phase copper busbar output terminal; 150. Second W-phase copper busbar; 151. Second W-phase copper busbar... 152. Second W-phase copper busbar output terminal; 160. BOOST positive copper busbar; 161. BOOST positive copper busbar input terminal; 162. BOOST positive copper busbar output terminal; 171. First copper busbar isolation barrier; 172. Second copper busbar isolation barrier; 180. Current sensor magnetic core; 190. Filter magnetic ring; 20. Housing; 30. First copper busbar; 311. First copper busbar input terminal; 312. First copper busbar output terminal; 40. Second copper busbar; 411. Second copper busbar input terminal; 412. Second copper busbar output terminal. Detailed Implementation

[0027] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1 , Figure 2A three-phase fixed base structure with disconnection protection function includes a three-phase fixed base 10 and a disconnection protection mechanism. Further, a three-phase copper busbar and a BOOST copper busbar are integrated on the three-phase fixed base. The disconnection protection mechanism includes a housing 20, a first copper busbar 30, a second copper busbar 40, and a circuit breaker mechanism. The first copper busbar 30 is located on the housing and is used to form a connecting circuit with the V-phase copper busbar in the three-phase copper busbar. The second copper busbar 40 is also located on the housing and is used to form a connecting circuit with the W-phase copper busbar in the three-phase copper busbar. The circuit breaker mechanism is located inside the housing and can disconnect the first copper busbar and / or the second copper busbar when the circuit is abnormal. In this way, when an abnormally large current occurs in the circuit, the disconnection protection mechanism can disconnect the first copper busbar 30 and the second copper busbar 40 in a very short time by pushing the internal circuit breaker mechanism, that is, disconnect the V-phase and W-phase circuits between the motor control IGBT or SiC module and the motor, protecting the motor controller and the motor from being burned out.

[0029] It should be noted that the circuit breaking mechanism in this embodiment adopts a structure that can achieve switching in the prior art, such as a combination of a conductive ring, a guide rod, a spring, and an electric push rod to form a retractable conductive structure. Thus, when the electric push rod pushes the conductive ring to switch on and off with the first copper busbar and / or the second copper busbar, the circuit can be switched on or off. Of course, the circuit breaking mechanism in this embodiment is not limited to the aforementioned conductive structure type; it can also be other mechanisms capable of switching on and off the circuit. Since the conductive structure used to switch on and off the circuit is prior art, it will not be elaborated upon here.

[0030] Furthermore, in order to facilitate the installation of the disconnection protection mechanism, an installation groove 11 for installing the disconnection protection mechanism is provided inside the three-phase fixed base 10. In use, the disconnection protection mechanism can be installed as a whole in the installation groove and fixed by bolts or other fasteners.

[0031] Reference Figure 2 As a preferred technical solution in this embodiment, the three-phase copper busbar includes a U-phase copper busbar 110, a V-phase copper busbar, and a W-phase copper busbar, wherein the U-phase copper busbar 110, the V-phase copper busbar, and the W-phase copper busbar are all arranged along the long side of the three-phase fixing base 10.

[0032] Furthermore, the U-phase copper busbar 110 includes a U-phase copper busbar input terminal 111 and a U-phase copper busbar output terminal 112. The U-phase copper busbar input terminal 111 is located on one long side of the three-phase fixed base 10, and the U-phase copper busbar output terminal 112 is located on the other long side of the three-phase fixed base. That is, in this embodiment, the U-phase copper busbar input terminal 111 and the U-phase copper busbar output terminal 112 are arranged opposite to each other along the long side of the three-phase fixed base 10. The U-phase copper busbar input terminal 111 is bolted to the U-phase output terminal of the motor control IGBT or SiC module, and the U-phase copper busbar output terminal 112 is bolted to the U-phase terminal of the motor winding.

[0033] As a preferred technical solution in this embodiment, the first copper busbar 30 includes a first copper busbar input terminal 311 and a first copper busbar output terminal 312, both of which are disposed on one side of the housing 20.

[0034] Reference Figure 2 In some embodiments, the V-phase copper busbar includes a first V-phase copper busbar 120 and a second V-phase copper busbar 130; further, the first V-phase copper busbar 120 includes a first V-phase copper busbar input terminal 121 and a first V-phase copper busbar output terminal 122, wherein the first V-phase copper busbar input terminal 121 is located on one long side of the three-phase fixing base 10, and the first V-phase copper busbar output terminal 122 is located on the inner side of the mounting groove 11. It should be noted that the first V-phase copper busbar input terminal 121 is bolted to the V-phase output terminal of the motor control IGBT or SiC module, and the first V-phase copper busbar output terminal 122 is bolted to the first copper busbar input terminal 311 in the disconnection protection mechanism.

[0035] Furthermore, the second V-phase copper busbar 130 includes a second V-phase copper busbar input terminal 131 and a second V-phase copper busbar output terminal 132. The second V-phase copper busbar input terminal 131 is disposed inside the mounting groove 11, and the second V-phase copper busbar output terminal 132 is disposed on the other long side of the three-phase fixed base 10. The second V-phase copper busbar input terminal 131 is bolted to the first copper busbar output terminal 312 on the disconnection protection mechanism, and the second V-phase copper busbar output terminal 132 is bolted to the V-phase terminal of the motor winding.

[0036] In some other embodiments, the second copper busbar 40 includes a second copper busbar input terminal 411 and a second copper busbar output terminal 412, both of which are located on the other side of the housing 20.

[0037] Furthermore, the W-phase copper busbar includes a first W-phase copper busbar 140 and a second W-phase copper busbar 150; furthermore, the first W-phase copper busbar 140 includes a first W-phase copper busbar input terminal 141 and a first W-phase copper busbar output terminal 142. The first W-phase copper busbar input terminal 141 is located on one long side of the three-phase fixing base 10, and the first W-phase copper busbar output terminal 142 is located inside the mounting groove 11. It should be noted that the first W-phase copper busbar input terminal 141 is bolted to the W-phase output terminal of the motor control IGBT or SiC module, and the first W-phase copper busbar output terminal 142 is bolted to the second copper busbar input terminal 411 in the disconnection protection mechanism.

[0038] Furthermore, the second W-phase copper busbar 150 includes a second W-phase copper busbar input terminal 151 and a second W-phase copper busbar output terminal 152. The second W-phase copper busbar input terminal 151 is disposed inside the mounting groove 11, and the second W-phase copper busbar output terminal 152 is disposed on the other long side of the three-phase fixed base 10. The second W-phase copper busbar input terminal 151 is bolted to the second copper busbar output terminal 412 on the disconnection protection mechanism, and the second W-phase copper busbar output terminal 152 is bolted to the W-phase terminal of the motor winding.

[0039] In this way, the first V-phase copper busbar 120, the second V-phase copper busbar 130, and the first copper busbar 30 in the disconnection protection mechanism form a V-phase circuit path; the first W-phase copper busbar 140, the second W-phase copper busbar 150, and the second copper busbar 40 in the disconnection protection mechanism form a W-phase circuit path. When an abnormally large current occurs in the circuit, the disconnection protection mechanism will cut off the first copper busbar 30 and the second copper busbar 40 by pushing the internal circuit breaking mechanism in a very short time, that is, cut off the V-phase and W-phase circuit loops between the motor control IGBT or SiC module and the motor, protecting the motor controller and the motor from being burned out.

[0040] Reference Figure 3 In some embodiments, the three-phase fixed base structure with disconnection protection function also includes a BOOST boost positive copper busbar 160. The BOOST boost positive copper busbar includes a BOOST boost positive copper busbar input terminal 161 and a BOOST boost positive copper busbar output terminal 162. The BOOST boost positive copper busbar input terminal 161 is located on one long side of the three-phase fixed base 10, and the BOOST boost positive copper busbar output terminal 162 is located on the other long side of the three-phase fixed base 10. The BOOST boost positive copper busbar input terminal 161 is connected to the low-voltage charging pile along with the relay and the DC copper busbar. The BOOST boost positive copper busbar output terminal 162 is connected to the neutral point of the motor winding by bolts. In addition, the BOOST boost negative copper busbar is shared with the UVW three-phase copper busbar on the three-phase fixed base 10, further improving integration and reducing space occupation volume.

[0041] Reference Figure 3 In some embodiments, the three-phase mounting base 10 is further provided with a first copper busbar isolation barrier 171 and a second copper busbar isolation barrier 172. Both the first and second copper busbar isolation barriers 171 and 172 are located inside the mounting groove 11. The first copper busbar isolation barrier 171 is located on one inner wall of the mounting groove 11, and the second copper busbar isolation barrier 172 is located opposite to the first copper busbar isolation barrier 171, i.e., on the other inner wall of the mounting groove 11. The first copper busbar isolation barrier 171 isolates the first V-phase copper busbar output terminal 122, the first copper busbar input terminal 311, the second V-phase copper busbar input terminal 131, and the first copper busbar output terminal 312, thereby increasing the electrical creepage distance and reducing insulation risk. The second copper busbar isolation barrier 172 isolates the first W-phase copper busbar output terminal 142, the second copper busbar input terminal 411, the second W-phase copper busbar input terminal 151, and the second copper busbar output terminal 412, also for increasing the electrical creepage distance and reducing insulation risk.

[0042] Furthermore, the three-phase mounting base 10 is also provided with a plurality of current sensor magnetic cores 180. The current sensor magnetic cores 180 are arranged along the long side of one side of the three-phase mounting base 10, that is, the current sensor magnetic cores 180 are arranged at the U-phase copper bus input terminal 111, the first V-phase copper bus input terminal 121, and the first W-phase copper bus input terminal 141, and are used to detect the AC circuit current value.

[0043] Furthermore, the three-phase mounting base 10 is also provided with a filter magnetic ring 190. The filter magnetic ring 190 is set along the long side of the other side of the three-phase mounting base 10, that is, the filter magnetic ring 190 is set at the position of the U-phase copper bus output terminal 112, the second V-phase copper bus output terminal 132, the second W-phase copper bus output terminal 152, and the BOOST boost positive copper bus output terminal 162, for filtering of the AC side circuit.

[0044] This application also provides a motor controller, including the aforementioned three-phase fixed base structure with disconnection protection function. The three-phase fixed base of the motor controller is provided with a disconnection protection mechanism. When an abnormally large current occurs in the circuit, the circuit breaking mechanism can be used to cut off the first copper busbar 30 and the second copper busbar 40, so as to protect the motor controller and the motor from being burned out.

[0045] In addition, this application also provides a vehicle whose motor controller adopts the aforementioned motor controller, which utilizes the effect of disconnecting the first copper busbar and the second copper busbar in the event of a circuit malfunction, thereby achieving the purpose of protecting the motor controller and the motor.

[0046] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A three-phase fixed base structure with disconnection protection function, characterized in that, include: Three-phase mounting base (10), on which a three-phase copper busbar is integrated; The disconnection protection mechanism includes a housing (20), a first copper busbar (30) disposed on the housing for forming a connection loop with the V phase copper busbar in the three-phase copper busbar, a second copper busbar (40) disposed on the housing for forming a connection loop with the W phase copper busbar in the three-phase copper busbar, and a circuit breaking mechanism disposed inside the housing capable of disconnecting the first copper busbar and / or the second copper busbar in case of circuit malfunction.

2. The three-phase fixed base structure with disconnection protection function according to claim 1, characterized in that, The three-phase mounting base (10) has an installation groove (11) on its inner side for installing the disconnection protection mechanism.

3. The three-phase fixed base structure with disconnection protection function according to claim 2, characterized in that, The V-phase copper busbar includes a first V-phase copper busbar (120) and a second V-phase copper busbar (130); the first V-phase copper busbar (120) includes a first V-phase copper busbar input terminal (121) disposed on a three-phase fixed base (10) and a first V-phase copper busbar output terminal (122) disposed inside the mounting groove (11). The second V-phase copper busbar (130) includes a second V-phase copper busbar input terminal (131) disposed inside the mounting groove (11) and a second V-phase copper busbar output terminal (132) disposed on the three-phase fixed base (10). The first copper busbar (30) includes a first copper busbar input terminal (311) disposed on one side of the housing (20) and electrically connected to the first V-phase copper busbar output terminal (122) and a first copper busbar output terminal (312) electrically connected to the second V-phase copper busbar input terminal (131).

4. The three-phase fixed base structure with disconnection protection function according to claim 3, characterized in that, The W-phase copper busbar includes a first W-phase copper busbar (140) and a second W-phase copper busbar (150); the first W-phase copper busbar (140) includes a first W-phase copper busbar input terminal (141) disposed on a three-phase fixed base (10) and a first W-phase copper busbar output terminal (142) disposed inside the mounting groove (11). The second W-phase copper busbar (150) includes a second W-phase copper busbar input terminal (151) disposed inside the mounting groove (11) and a second W-phase copper busbar output terminal (152) disposed on the three-phase fixed base (10). The second copper busbar (40) includes a second copper busbar input terminal (411) disposed on the other side of the housing (20) and electrically connected to the first W phase copper busbar output terminal (142) and a second copper busbar output terminal (412) electrically connected to the second W phase copper busbar input terminal (151).

5. The three-phase fixed base structure with disconnection protection function according to claim 4, characterized in that, The three-phase fixed base structure with disconnection protection function also includes a BOOST boost positive copper busbar (160), which includes a BOOST boost positive copper busbar input terminal (161) located on one long side of the three-phase fixed base (10) and a BOOST boost positive copper busbar output terminal (162) located on the other long side of the three-phase fixed base (10).

6. The three-phase fixed base structure with disconnection protection function according to claim 5, characterized in that, The inner wall of the mounting groove (11) is provided with a first copper busbar isolation barrier (171) on one side and a second copper busbar isolation barrier (172) on the other side.

7. The three-phase fixed base structure with disconnection protection function according to claim 5, characterized in that, Several current sensor cores (180) are provided on one long side of the three-phase mounting base (10).

8. The three-phase fixed base structure with disconnection protection function according to claim 7, characterized in that, A filter magnetic ring (190) is provided on the other long side of the three-phase fixed base (10).

9. A motor controller, characterized in that, The three-phase fixed base structure with disconnection protection function as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the motor controller as described in claim 9.

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