Motor control system and electric equipment

Abstract

The utility model provides a motor control system and electric equipment, and belongs to the technical field of electronic components. The motor control system comprises a shell, a bus capacitor, a boost capacitor, a first relay and a second relay. Elements such as the bus capacitor, the boost capacitor, the first relay and the second relay are highly integrated in the accommodating cavity of the shell, the space utilization rate in the shell is maximized, and light installation and maintenance are realized. The bus capacitor and the boost capacitor can stabilize voltage fluctuation, can also enhance the voltage regulation flexibility and meet various load requirements, and can flexibly regulate the voltage according to specific loads by controlling the first relay and the second relay, thereby improving the response speed and optimizing the energy efficiency.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic components, and particularly to a motor control system and an electrical equipment. Background Art

[0002] With the rapid development of the electric vehicle industry, the technologies of electric vehicle components are constantly evolving towards lightweight and integration. Metallized film capacitors are used in parallel between the power supply and the power module to play the roles of AC filtering and voltage smoothing.

[0003] However, the conventional in-vehicle metallized film capacitors have a simple structure and single function. Generally, the capacitors for filtering, the capacitors for support, and the rest of the electronic components are assembled separately, which occupy a large volume, have a low space utilization rate, and the assembly steps are cumbersome. Utility Model Content

[0004] The embodiments of the present application provide a motor control system and an electrical equipment, which internally integrate a bus capacitor, a boost capacitor, two relays, and a protection circuit. The bus capacitor can be used for AC filtering and effectively smoothing the output voltage fluctuation of the DC power supply to improve the power quality. The boost capacitor can be used for DC support to provide additional voltage support to meet the requirements of high voltage or high power output. By the attraction and separation of the coils in the two relays, the combination and isolation of the bus capacitor and the boost capacitor are controlled to realize the efficient management and protection of the DC power supply, so as to adapt to the requirements of more working conditions.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] In the first part, the embodiments of the present application provide a motor control system, including:

[0007] A housing, which has a receiving cavity inside, and is provided with a first external terminal and a second external terminal on the housing;

[0008] A bus capacitor, which is located in the receiving cavity of the housing, and the bus capacitor is used for voltage smoothing and AC filtering;

[0009] A boost capacitor, which is located in the receiving cavity of the housing, and the boost capacitor is used for adjusting the voltage to meet the load requirements;

[0010] A first relay, which is located in the receiving cavity of the housing, a first end of the first relay is connected to the bus capacitor, a second end of the first relay is connected to the first external terminal, and the first external terminal is connected to an external circuit;

[0011] A second relay, which is located in the accommodation cavity of the housing. A first end of the second relay is connected to the boost capacitor, and a second end of the second relay is connected to the second external terminal. The second external terminal is the positive extreme of the DC circuit after being processed by the boost capacitor.

[0012] The motor control system provided by the embodiment of the present application includes a housing, a bus capacitor, a boost capacitor, a first relay, and a second relay. Among them, the housing has an accommodation cavity, and the bus capacitor, the boost capacitor, the first relay, and the second relay are all located in the accommodation cavity of the housing. By means of a highly integrated design, components such as the bus capacitor, the boost capacitor, the first relay, and the second relay are compactly placed in the accommodation cavity of the housing, effectively reducing external connections, lowering complexity and failure rate, maximizing the space utilization rate inside the housing, and realizing lightweight installation and maintenance. And the accommodation cavity of the housing isolates the external harsh environment, improves the durability of internal components, and ensures stable operation under various working conditions. Specifically, an external circuit is connected to the first relay through a first external terminal on the housing, and the bus capacitor is controlled through the first relay to achieve the functions of smoothing voltage and AC filtering. The second external terminal on the housing is the positive extreme of the DC circuit, and the second external terminal is connected to the second relay. The boost capacitor is controlled through the second relay to adjust the voltage to meet the load requirements.

[0013] In a possible implementation manner, a protection circuit is further included. The protection circuit is located between the negative extreme of the DC circuit and the bus capacitor, and / or the protection circuit is located between the negative extreme of the DC circuit and the boost capacitor;

[0014] The boost capacitor, the bus capacitor, the protection circuit, and at least two of the relays are integrated into one body in the accommodation cavity of the housing.

[0015] In a possible implementation manner, the bus capacitor includes a first copper bar and a plurality of first capacitor cores. The plurality of first capacitor cores are located in the accommodation cavity, and one end of each first capacitor core is connected to a first end of the first relay through the first copper bar;

[0016] The boost capacitor includes a second copper bar and a plurality of second capacitor cores. The plurality of second capacitor cores are located in the accommodation cavity, and one end of each second capacitor core is connected to a first end of the second relay through the second copper bar.

[0017] In a possible implementation manner, a third copper bar is further included. The other end of each first capacitor core and the other end of each second capacitor core are both connected to the third copper bar, and the third copper bar is connected to the negative extreme of the DC circuit through the protection circuit.

[0018] In a possible implementation, the first relay includes a first terminal, a second terminal, a first connection terminal, and a first coil. The second terminal is located at the first end of the first relay, and the second terminal is connected to the first capacitor core through the first copper bar;

[0019] The first terminal and the first connection terminal are located at the second end of the first relay. The first terminal is connected to the first external terminal, and the first connection terminal is used to connect to the second relay.

[0020] In a possible implementation, the second relay includes a third terminal, a fourth terminal, a second connection terminal, and a second coil. The fourth terminal is located at the first end of the second relay, and the fourth terminal is connected to the second capacitor core through the second copper bar;

[0021] The third terminal and the second connection terminal are located at the second end of the second relay. The third terminal is used to connect to an AC circuit. The first connection terminal is connected to the second relay through the second connection terminal, and the second connection terminal is connected to the second external terminal.

[0022] In a possible implementation, it further includes an external copper bar. One end of the external copper bar is provided with a third external terminal. The third external terminal is connected to the third terminal of the second relay through the external copper bar, and the third external terminal is used to connect to an AC circuit.

[0023] In a possible implementation, when the first voltage is applied to the third external terminal, the first coil of the first relay and the second coil of the second relay are both in the attracted state, and the second external terminal is the positive extreme of the DC circuit;

[0024] When the second voltage is applied to the third external terminal, the first coil of the first relay is in the attracted state and the second coil of the second relay is in the separated state, and the second external terminal is the positive extreme of the DC circuit;

[0025] When the third voltage is applied to the third external terminal, when the first coil of the first relay is in the separated state and the second coil of the second relay is in the attracted state, the second external terminal is the positive extreme of the DC circuit.

[0026] In a possible implementation, a fourth external terminal is further provided on the housing. The negative extreme of the DC circuit is connected to the third copper bar through the fourth external terminal.

[0027] In a possible implementation, a first signal terminal and a second signal terminal are provided on the housing. The first signal terminal is connected to the first relay, and a signal is received through the first signal terminal to control the first coil of the first relay to attract or separate.

[0028] The second signal terminal is connected to the second relay, and a signal is received through the second signal terminal to control the second coil of the second relay to attract or separate.

[0029] In a possible implementation, a first lead is further included. The first lead is connected to the first copper bar of the bus capacitor, and the first lead is used to collect voltage data of the bus capacitor.

[0030] In a possible implementation, a second lead is further included. The second lead is connected to the external copper bar, and the second lead is used to collect voltage data of the external copper bar.

[0031] In a possible implementation, a positive terminal and a negative terminal are further provided on the housing. The first copper bar and the second copper bar are both connected to the positive terminal, and the third copper bar is connected to the negative terminal.

[0032] In a possible implementation, a slot is provided on the housing. The slot is used to accommodate an insulated gate bipolar transistor. The collector of the insulated gate bipolar transistor is connected to the positive terminal on the housing, and the emitter of the insulated gate bipolar transistor is connected to the negative terminal on the housing.

[0033] In a possible implementation, a cooling channel is provided inside the housing. The cooling channel is used to dissipate heat from the insulated gate bipolar transistor and the accommodation cavity.

[0034] In a possible implementation, a water inlet hole and a water outlet hole are provided on the housing. The water inlet hole is provided at one end of the cooling channel, and the water outlet hole is provided at the other end of the cooling channel.

[0035] Second part, an electrical device is provided in an embodiment of the present application, including:

[0036] An electrical device, and the above-mentioned motor control system, where the motor control system is used to provide a stable voltage for the electrical device;

[0037] And / or, the motor control system is used to provide a stable current for the electrical device.

[0038] In addition to the technical problems solved by this application, the technical features constituting the technical solution, and the beneficial effects brought by the technical features of these technical solutions described above, other technical problems that can be solved by a motor control system and an electrical equipment provided by this application, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments of this application or the prior art. Obviously, the following drawings are only a part of the embodiments of this application. These drawings and the textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 Structural schematic diagram of the motor control system provided by the embodiment of this application;

[0041] Figure 2 Front schematic diagram of the internal structure of the motor control system provided by the embodiment of this application;

[0042] Figure 3 Back schematic diagram of the internal structure of the motor control system provided by the embodiment of this application.

[0043] Description of the reference numerals:

[0044] 100 - housing; 110 - positive terminal; 120 - negative terminal; 130 - fourth external terminal; 140 - first signal terminal; 150 - second signal terminal; 160 - slot; 170 - water inlet hole; 180 - water outlet hole;

[0045] 200 - bus capacitor; 210 - first capacitor core; 220 - first copper bar;

[0046] 300 - boost capacitor; 310 - second capacitor core; 320 - second copper bar;

[0047] 400 - third copper bar;

[0048] 500 - external copper bar; 510 - third external terminal;

[0049] 600 - first relay; 610 - first terminal; 620 - second terminal; 630 - first connection terminal; 640 - first coil; 650 - first external terminal;

[0050] 700 - Second relay; 710 - Third terminal; 720 - Fourth terminal; 730 - Second connection terminal; 740 - Second coil; 750 - Second external terminal;

[0051] 800 - Protection circuit;

[0052] 910 - First lead; 920 - Second lead. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0054] The embodiments of the present application provide an electrical device, which includes an electrical device and a battery system, and the battery system provides electrical energy for the electrical device. For example, the electrical device can be a vehicle or an energy storage device. When the electrical device is a vehicle, the vehicle can be a new energy vehicle (New Energy Vehicle), such as a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle; abbreviated: PEV / BEV), a range-extended electric vehicle (Range Extended Electric Vehicle; abbreviated: REEV), a hybrid electric vehicle (Hybrid Electric Vehicle; abbreviated: HEV), a fuel cell electric vehicle), and the vehicle can also be any vehicle with a battery.

[0055] The electrical device can also be a motor, a control system, a lighting system, etc. When the electrical device is an energy storage device, the electrical device can be an inverter, a controller, etc. The battery system can be a battery pack, and the battery pack includes multiple batteries. In a possible implementation manner, the battery can be a cylindrical battery, or the battery can be a square shell battery, or there are several battery cells inside the battery. And the multiple batteries realize the storage and output of electrical energy through a certain connection method and a control system, and the electrical energy provided by the battery pack or the battery can be used for the electrical device to meet the normal operation of the device.

[0056] The battery can be a primary battery or a secondary battery. Among them, a primary battery is a battery that cannot be restored to its usable state by charging after completing the discharge process. A secondary battery is a type of battery that can activate the internal active materials through charging means after completion of discharge, so as to be able to continue to be used. The battery can be a lithium-ion battery, a sodium-ion battery, a lithium-sulfur battery, etc., and the form of the battery can be a square case, a cylinder, a soft package, or a battery of other shapes.

[0057] An embodiment of the present application provides a motor control system, as Figure 1 and Figure 3 shown, including a housing 100, a bus capacitor 200, a first relay 600, and a second relay 700. Among them, the housing 100 has a receiving cavity, and the housing 100 is provided with a first external terminal 650 and a second external terminal 750. The bus capacitor 200 is located in the receiving cavity of the housing 100, and the bus capacitor 200 is used for smoothing the voltage. The boost capacitor 300 is located in the receiving cavity of the housing 100. The first relay 600 is located in the receiving cavity of the housing 100. The first end of the first relay 600 is connected to the bus capacitor 200, and the second end of the first relay 600 is connected to the first external terminal 650. The first external terminal 650 is used for connecting to an external circuit. The second relay 700 is located in the receiving cavity of the housing 100. The first end of the second relay 700 is connected to the boost capacitor 300, and the second end of the second relay 700 is connected to the second external terminal 750. The second external terminal 750 is the positive extreme of the DC circuit after being processed by the boost capacitor 300.

[0058] The housing 100 internally has a receiving cavity, and components such as the bus capacitor 200, the boost capacitor 300, the first relay 600, and the second relay 700 are located in the receiving cavity, which can effectively prevent adverse factors such as external dust, moisture, and vibration from damaging the components, thereby prolonging the service life of the components. By reasonably designing the shape and size of the receiving cavity, the internal space of the housing 100 can be maximally utilized to ensure that all components can be placed compactly and orderly, avoiding waste of space, so that the inside of the motor control system is more integrated. The housing 100 can adopt an aluminum alloy shell, but is not limited to the aluminum alloy material, and the material and size of the shell can be adjusted accordingly according to the actual working conditions requirements.

[0059] The bus capacitor 200 is used for smoothing the voltage. By storing and releasing charges, it can effectively reduce the voltage fluctuations in the DC circuit caused by load fluctuations or power supply instability, and provide a stable voltage environment for the entire power consumption system. The boost capacitor 300 can achieve voltage regulation of the motor control system. By controlling the connection and disconnection of the bus capacitor 200 and the boost capacitor 300, the boost capacitor 300 is used to assist the bus capacitor 200 to boost the voltage to meet the voltage requirements of the load and improve the flexibility and adaptability of the system.

[0060] Integrate the bus capacitor 200, the boost capacitor 300, the first relay 600, and the second relay 700 within the housing 100. The first relay 600 is connected to the bus capacitor 200, and the second relay 700 is connected to the boost capacitor 300. By controlling the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700, the connection and disconnection of the bus capacitor 200 and the boost capacitor 300 can be realized, enabling more precise control to meet the requirements of specific loads.

[0061] It should be noted that in the example of this application, the DC circuit can be a battery pack. The external AC circuit is connected to the third external terminal 510 of the external copper bar 500 of the motor control system. The AC voltage is regulated and AC filtered through the bus capacitor 200 and the boost capacitor 300. The second external terminal 750 is the positive extreme of the DC circuit, and the fourth external terminal 130 is the negative extreme of the DC circuit. The first external terminal 650 is connected to the external circuit, and the bus voltage is smoothed through the bus capacitor to improve voltage stability and reduce voltage fluctuations. It can be understood that the AC power is connected to the third external terminal 510, passes through the bus capacitor 200 and the boost capacitor 300, the positive extreme of the battery pack is connected to the second external terminal 750, and the negative extreme of the battery pack is connected to the fourth external terminal 130 to achieve DC charging of the battery pack.

[0062] In some embodiments of this application, such as Figure 2 and Figure 3 shown, the motor control system further includes a protection circuit 800. The protection circuit 800 is located between the negative extreme of the DC circuit and the bus capacitor 200, and / or the protection circuit 800 is located between the negative extreme of the DC circuit and the boost capacitor 300. The boost capacitor 300, the bus capacitor 200, the protection circuit 800, and at least two relays are integrated into one body within the accommodation cavity of the housing 100.

[0063] In the example of this application, the protection circuit 800 is located between the fourth external terminal 130 and the first copper bar 220 of the bus capacitor 200, but is not limited to this position and can be adjusted adaptively according to the space within the accommodation cavity. The protection circuit 800 can be a kind of fuse, but is not limited to a fuse, and the number of fuses is not limited to one. The protection circuit 800 plays a role in overcurrent protection to ensure the operation safety of the motor control system. The protection circuit 800 can be melted in time when the motor control system is abnormal, thereby cutting off the circuit to prevent safety accidents such as equipment damage or fire.

[0064] In some embodiments of this application, such as Figure 2 and Figure 3As shown in the figure, the boost capacitor 300 includes a first copper bar 220 and a number of first capacitor cores 210. The number of first capacitor cores 210 is located in the accommodation cavity. One end of each first capacitor core 210 is connected to the first end of the first relay 600 through the first copper bar 220. The boost capacitor 300 includes a second copper bar 320 and a number of second capacitor cores 310. The number of second capacitor cores 310 is located in the accommodation cavity. One end of each second capacitor core 310 is connected to the first end of the second relay 700 through the second copper bar 320. The motor control system further includes a third copper bar 400. The other end of each first capacitor core 210 and the other end of each second capacitor core 310 are both connected to the third copper bar 400, and the third copper bar 400 is connected to the negative extreme of the DC circuit through a protection circuit 800.

[0065] It can be understood that one end of each first capacitor core 210 is connected to the first copper bar 220, which can fix the first capacitor core 210. One end of each second capacitor core 310 is connected to the second copper bar 320, which can fix the first capacitor core 210 and the second capacitor core 310 to ensure the stability of the connection. The other end of each first capacitor core 210 and the other end of each second capacitor core 310 are both electrically connected to the third copper bar 400. The third copper bar 400 serves as a common negative electrode and connects the other ends of all the first capacitor cores 210 and the second capacitor cores 310.

[0066] In the embodiment of the present application, the number of the first capacitor cores 210 of the bus capacitor 200 is nine. One end of the nine first capacitor cores 210 is electrically connected to the first copper bar 220, and the other end of the nine first capacitor cores 210 is electrically connected to the third copper bar 400. The number of the second capacitor cores 310 of the boost capacitor 300 is three. One end of the three second capacitor cores 310 is electrically connected to the second copper bar 320, and the other end of the three second capacitor cores 310 is electrically connected to the third copper bar 400.

[0067] It should be noted that the number of the first capacitor cores 210 and the second capacitor cores 310 can be the above distribution, but is not limited to the above distribution. For example, the number of the first capacitor cores 210 can also be twelve, and the number of the second capacitor cores 310 can also be six. The size, number, arrangement method and capacitance value of the first capacitor cores 210 and the second capacitor cores 310 can be adjusted according to the actual structure of the housing and the requirements of the electrical parameters.

[0068] In the example of this application, the first capacitor core 210 and the second capacitor core 310 can be a thin-film capacitor core, which is composed of a metal thin film and a non-metal thin film. The metal thin film serves as the electrode, and the non-metal thin film serves as the dielectric layer. The metal thin film and the non-metal thin film are alternately stacked or wound to form the capacitor core. The thin-film capacitor core can adopt any one of the winding type and the laminating type, which is not limited here. The materials and sizes of the metal thin film and the non-metal thin film are not elaborated here and can be selected according to actual needs.

[0069] In some embodiments of this application, such as Figure 2 and Figure 3 shown, the first relay 600 includes a first terminal 610, a second terminal 620, a first connection terminal 630, and a first coil 640. The second terminal 620 is located at the first end of the first relay 600, and the second terminal 620 is connected to the first capacitor core 210 through a first copper bar 220. The first terminal 610 and the first connection terminal 630 are located at the second end of the first relay 600. The first terminal 610 is connected to a first external terminal 650, and the first connection terminal 630 is used to connect to a second relay 700.

[0070] It can be understood that the first coil 640 is a component in the first relay 600 that controls the closing or opening between the first terminal 610 and the first connection terminal 630 located at the second end and the second terminal 620 located at the first end. The second terminal 620 is connected to the first capacitor core 210 through a first copper bar 220. When the first coil 640 of the first relay 600 is closed, the first capacitor core 210 is connected to the circuit through the second terminal 620. The first terminal 610 is connected to the first external terminal 650 on the housing 100 and can be used to connect the bus capacitor of the motor control system in the external circuit to achieve the functions of AC filtering and voltage stabilization. When the first signal terminal 140 on the housing 100 receives a control signal to control the first coil 640 of the first relay 600 to attract, the first terminal 610 and the second terminal 620 are closed or separated, so as to achieve precise control of the switching state of the first coil 640 in the first relay 600.

[0071] In some embodiments of this application, such as Figure 2 and Figure 3As shown, the second relay 700 includes a third terminal 710, a fourth terminal 720, a second connection terminal 730, and a second coil 740. The fourth terminal 720 is located at the first end of the second relay 700, and the fourth terminal 720 is connected to the second capacitor core 310 through the second copper bar 320. The third terminal 710 and the second connection terminal 730 are located at the second end of the second relay 700. The third terminal 710 is used to connect to an AC circuit. The first connection terminal 630 is connected to the second relay 700 through the second connection terminal 730, and the second connection terminal 730 is connected to the second external terminal 750.

[0072] It can be understood that the second coil 740 is a component in the second relay 700 that controls the closing or opening between the third terminal 710 and the second connection terminal 730 located at the second end and the fourth terminal 720 located at the second end. The fourth terminal 720 is connected to the second capacitor core 310 through the second copper bar 320. When the second coil 740 of the second relay 700 is closed, the second capacitor core 310 is connected to the circuit through the fourth terminal 720. The third terminal 710 is connected to the second external terminal 750 on the housing 100 through the second connection terminal 730, and can be used for the positive extreme of the DC circuit of the external load to be connected, so as to adjust the voltage to meet the load voltage requirement. When the second signal terminal 150 on the housing 100 receives a control signal, it controls the second coil 740 of the second relay 700 to attract, so that the third terminal 710 and the fourth terminal 720 are closed or separated, so as to realize precise control of the switching state of the second relay 700.

[0073] It can be understood that the first relay 600 and the second relay 700 are connected through the first connection terminal 630 and the second connection terminal 730, so that the first relay 600 and the second relay 700 cooperate with each other to realize complex control logic and meet the voltage requirement of the load.

[0074] The third terminal 710 of the second relay 700 is connected to the second external terminal 750 on the housing 100 through the second connection terminal 730, and the second external terminal can be used as the positive extreme of the DC circuit. Exemplarily, the first connection terminal 630 of the first relay 600 and the second connection terminal 730 of the second relay 700 can be electrically connected through a metal connector, so as to realize power transmission between the first relay 600 and the second relay 700. In the embodiment of the present application, the first connection terminal 630 of the first relay 600 is close to the second connection terminal 730 of the second relay 700, which is beneficial to reducing the connection length between the first relay 600 and the second relay 700, reducing resistance and line loss, and is also convenient for installation and maintenance, but is not limited to the illustrated connection layout and is not limited here.

[0075] In some embodiments of the present application, such asFigure 2 and Figure 3 As shown in Figure 3 , the motor control system further includes an external copper bar 500. One end of the external copper bar 500 is provided with a third external terminal 510. The third external terminal 510 is connected to the third terminal 710 of the second relay 700 through the external copper bar 500. The third external terminal 510 is used to connect to an AC circuit. For example, when the battery pack is charged through an external power source, the external alternating current is connected to the third external terminal 510 of the external copper bar 500. According to the voltage data collected by the second lead 920 connected to the external copper bar 500, the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 are controlled to be in the attracted or separated state, for smooth voltage, AC filtering, and regulating the boost to meet the charging requirements of the battery pack.

[0076] In a possible implementation, when the third external terminal 510 is connected to a first voltage, both the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 are in the attracted state, and the second external terminal 750 is the positive extreme of the DC circuit. In another possible implementation, when the third external terminal 510 is connected to a second voltage, the first coil 640 of the first relay 600 is in the attracted state and the second coil 740 of the second relay 700 is in the separated state, and the second external terminal 750 is the positive extreme of the DC circuit. In another possible implementation, when the third external terminal 510 is connected to a third voltage, when the first coil 640 of the first relay 600 is in the separated state and the second coil 740 of the second relay 700 is in the attracted state, the second external terminal 750 is the positive extreme of the DC circuit. It can be understood that the charging requirements of the battery pack are met by controlling the connection conditions of different terminals.

[0077] As Figure 3 shown, in the example of the present application, the bus capacitor 200 provides a capacitance of 560 microfarads for nine first capacitor cores 210, and the boost capacitor 300 provides a capacitance of 150 microfarads for three second capacitor cores 310, but is not limited to the above capacitance storage. There are a total of six external terminals on the housing 100 of the motor control system, namely the positive extreme terminal 110, the negative extreme terminal 120, the first external terminal 650, the second external terminal 750, the third external terminal 510, and the fourth external terminal 130. Among them, the external circuit is connected to the bus capacitor 200 through the first external terminal 650 to achieve smooth voltage and AC filtering. The second external terminal 750 is connected to the boost capacitor 300 through the second connection terminal 730 to adjust the voltage to meet the load requirements. The second external terminal 750 is the positive extreme of the DC circuit, the fourth external terminal 130 is the negative extreme of the DC circuit, and the third external terminal 510 is the connection end of the AC circuit.

[0078] In a possible implementation, when the voltage of the external AC power supply connected to the third external terminal 510 of the external copper busbar 500 is the first voltage, and the second lead 920 recognizes the first voltage and controls both the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 to be in the attracted state, that is, the voltages of the first connection terminal 630 and the second connection terminal 730 are the same. The common negative electrode third copper busbar 400 to which the first capacitor core 210 of the bus capacitor 200 and the second capacitor core 310 of the boost capacitor 300 are connected is connected to the fourth external terminal 130. The second external terminal 750 is the positive extreme of the DC circuit, and the fourth external terminal 130 is the negative extreme of the DC circuit, which are respectively connected to the positive and negative electrodes of the battery pack, and can meet the charging voltage requirements of the battery pack.

[0079] In another possible implementation, when the voltage input by the external power supply to the third external terminal 510 of the external copper busbar 500 is the second voltage, the second lead 920 recognizes the second control voltage and the first coil 640 of the first relay 600 is in the attracted state while the second coil 740 of the second relay 700 is in the separated state, that is, the bus capacitor 200 and the boost capacitor 300 are isolated from each other. The second external terminal 750 is the positive extreme of the DC circuit, and the fourth external terminal 130 is the negative extreme of the DC circuit, which are respectively connected to the positive and negative electrodes of the battery pack, and can meet the charging voltage requirements of the battery pack. In another possible implementation, when the voltage input by the external power supply to the third external terminal 510 of the external copper busbar 500 is the third voltage, the second lead 920 recognizes the third voltage and controls the second coil 740 of the second relay 700 to be in the separated state while the first coil 640 of the first relay 600 is in the attracted state, that is, the bus capacitor 200 and the boost capacitor 300 are isolated from each other. The second external terminal 750 is the positive extreme of the DC circuit, and the fourth external terminal 130 is the negative extreme of the DC circuit, which are respectively connected to the positive and negative electrodes of the battery pack, and can meet the charging voltage requirements of the battery pack.

[0080] The first relay 600 and the second relay 700 receive external control signals and respectively control the attracted and separated states of the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 to achieve the regulation of voltage increase. In a possible implementation, when the voltage input to the third external terminal 510 at the end of the external copper busbar 500 cannot meet the charging requirements of the battery pack, by receiving an electrical signal, the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 are controlled to be in different attracted states, realizing the parallel connection of the bus capacitor 200 and the boost capacitor 300. So that the voltage of the external power supply can be increased through the bus capacitor 200 and the boost capacitor 300, and the fourth external terminal 130 and the second external terminal 750 are respectively the negative and positive poles of the boosted DC voltage.

[0081] In some embodiments of the present application, such as Figure 1 and Figure 2 shown, a first signal terminal 140 and a second signal terminal 150 are provided on the housing 100. The first signal terminal 140 is connected to the first relay 600, and the first relay 600 is controlled to attract or separate its first coil 640 by receiving a signal through the first signal terminal 140. The second signal terminal 150 is connected to the second relay 700, and the second relay 700 is controlled to attract or separate its second coil 740 by receiving a signal through the second signal terminal 150.

[0082] It can be understood that the first signal terminal 140 is connected to the first relay 600. When an external control circuit sends a specific signal to the first signal terminal 140, the signal is transmitted to the first coil 640 of the first relay 600, thereby controlling the attraction or separation of the first coil 640. Similarly, the second signal terminal 150 is connected to the second relay 700. By sending a signal to the second signal terminal 150, the external control circuit can control the attraction or separation of the second coil 740 of the second relay 700. In this way, the first relay 600 and the second relay 700 can work independently according to external instructions or work together to achieve more complex circuit control logics.

[0083] In some embodiments of the present application, such as Figure 1 and Figure 2 shown, the motor control system further includes a first lead 910 and a second lead 920. The first lead 910 is connected to the first copper row 220 of the bus capacitor 200, and the first lead 910 is used to collect voltage data of the bus capacitor 200. The second lead 920 is connected to the external copper row 500, and the second lead 920 is used to collect voltage data of the external copper row 500.

[0084] It can be understood that the first lead 910 is connected to the first copper row 220 of the bus capacitor 200. By collecting the voltage data through the first lead 910, the working state of the bus capacitor 200 can be monitored in real time to ensure that the bus capacitor 200 operates within a safe range. The second lead 920 is connected to the external copper row 500. By collecting the voltage data on the external copper row 500 through the second lead 920, the attraction or separation states of the first coil 640 and the second coil 740 can be controlled for the first signal terminal 140 and the second signal terminal 150 according to the voltage information collected by the second lead 920 to meet the load requirements of the external circuit.

[0085] In some embodiments of the present application, such as Figure 1 and Figure 2As shown, a positive terminal 110 and a negative terminal 120 are also provided on the housing 100. Both the first copper busbar 220 and the second copper busbar 320 are connected to the positive terminal 110, and the third copper busbar 400 is connected to the negative terminal 120. A slot 160 is also provided on the housing 100. The slot 160 is used to accommodate an insulated gate bipolar transistor. The collector of the insulated gate bipolar transistor is connected to the positive terminal 110 on the housing 100, the emitter of the insulated gate bipolar transistor is connected to the negative terminal 120 on the housing 100, and the gate of the insulated gate bipolar transistor is connected to a drive circuit for receiving a signal to control the insulated gate bipolar transistor.

[0086] It can be understood that a slot 160 for accommodating an insulated gate bipolar transistor (IGBT) is provided on the housing 100. The number and size of the slots 160 on the housing 100 can be adjusted and designed according to the installation requirements to ensure that the IGBT can be stably placed therein, while facilitating heat dissipation and electrical connection. It should be noted that the IGBT generates large current and voltage fluctuations during the switching process. By connecting the IGBT to the motor control system, the energy generated during the IGBT switching process can be effectively absorbed and stored, thereby slowing down the fluctuation speed of the current and voltage and reducing the switching loss and electromagnetic interference. Among them, the collector of the IGBT is connected to the positive terminal 110 on the housing 100, and the emitter of the IGBT is connected to the negative terminal 120 on the housing 100 to ensure that the IGBT can be correctly connected to the circuit. By connecting a bus capacitor, the inductance parameter of the IGBT can be reduced, which helps to weaken the peak voltage of the bus and further protect the circuit.

[0087] In some embodiments of the present application, a cooling channel (not shown in the figure) is provided inside the housing 100. The cooling channel is used to dissipate heat from the insulated gate bipolar transistor and the boost capacitor 300, bus capacitor 200, protection circuit 800, first relay 600, and second relay 700 located in the accommodation cavity. As Figure 3 shown, a water inlet hole 170 and a water outlet hole 180 are provided on the housing 100. The water inlet hole 170 is provided at one end of the cooling channel, and the water outlet hole 180 is provided at the other end of the cooling channel.

[0088] It can be understood that in a high-power power conversion system, components such as the IGBT, boost capacitor 300, bus capacitor 200, protection circuit 800, and first relay 600 and second relay 700 generate a large amount of heat during operation. To ensure the stable operation of the above components and extend their service life, a cooling channel is provided inside the housing 100 and is connected to an external cooling system through the water inlet hole 170 and the water outlet hole 180 to form an effective heat dissipation system.

[0089] In a possible implementation, the cooling channels inside the housing 100 include a first channel and a second channel, and the first channel is connected to the second channel. The first channel is used to dissipate heat from the boost capacitor 300, bus capacitor 200, protection circuit 800, first relay 600, and second relay 700 in the accommodation cavity, and the second channel is used to dissipate heat from the IGBT. The water inlet hole 170 and the water outlet hole 180 can be respectively arranged at both ends of the first cooling channel. The coolant takes away heat through the first channel and the second channel to prevent the components from overheating and keep their operating temperatures within the allowable range.

[0090] Herein, terms such as "upper" and "lower" are used to describe the relative positional relationships of the respective structures in the drawings. They are only for the sake of clarity in narration and do not limit the scope in which the present application can be implemented. Any change or adjustment in their relative relationships shall also be regarded as the scope in which the present application can be implemented without substantial change in the technical content.

[0091] It should be noted that in the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0092] In addition, in the present application, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0093] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor control system, characterized in that, Comprising: A housing (100) having an accommodation cavity therein, and the housing (100) is provided with a first external terminal (650) and a second external terminal (750); A bus capacitor (200) located in the accommodation cavity of the housing (100), and the bus capacitor (200) is used for smoothing voltage and AC filtering; A boost capacitor (300) located in the accommodation cavity of the housing (100), and the boost capacitor (300) is used for adjusting the voltage to meet the load demand; A first relay (600) located in the accommodation cavity of the housing (100), a first end of the first relay (600) is connected to the bus capacitor (200), a second end of the first relay (600) is connected to the first external terminal (650), and the first external terminal (650) is used for connecting to an external circuit; A second relay (700) located in the accommodation cavity of the housing (100), a first end of the second relay (700) is connected to the boost capacitor (300), a second end of the second relay (700) is connected to the second external terminal (750), and the second external terminal (750) is the positive extreme of the DC circuit after being processed by the boost capacitor (300).

2. The motor control system according to claim 1, wherein Further comprising a protection circuit (800) located between the negative extreme of the DC circuit and the bus capacitor (200), and / or the protection circuit (800) is located between the negative extreme of the DC circuit and the boost capacitor (300); The boost capacitor (300), the bus capacitor (200), the protection circuit (800) and at least two of the relays are integrated in the accommodation cavity of the housing (100).

3. The motor control system according to claim 1 or 2, characterized in that, The bus capacitor (200) includes a first copper bar (220) and a plurality of first capacitor cores (210), the plurality of first capacitor cores (210) are located in the accommodation cavity, and one end of each first capacitor core (210) is connected to the first end of the first relay (600) through the first copper bar (220); The boost capacitor (300) includes a second copper bar (320) and a plurality of second capacitor cores (310), the plurality of second capacitor cores (310) are located in the accommodation cavity, and one end of each second capacitor core (310) is connected to the first end of the second relay (700) through the second copper bar (320).

4. The motor control system according to claim 3, wherein Further comprising a third copper bar (400), the other end of each first capacitor core (210) and the other end of each second capacitor core (310) are both connected to the third copper bar (400), and the third copper bar (400) is connected to the negative extreme of the DC circuit through the protection circuit (800).

5. The motor control system according to claim 3, wherein The first relay (600) includes a first terminal (610), a second terminal (620), a first connection terminal (630), and a first coil (640). The second terminal (620) is located at the first end of the first relay (600), and the second terminal (620) is connected to the first capacitor core (210) through the first copper bar (220). The first terminal (610) and the first connection terminal (630) are located at the second end of the first relay (600). The first terminal (610) is connected to the first external terminal (650), and the first connection terminal (630) is used to connect to the second relay (700).

6. The motor control system according to claim 5, wherein The second relay (700) includes a third terminal (710), a fourth terminal (720), a second connection terminal (730), and a second coil (740). The fourth terminal (720) is located at the first end of the second relay (700), and the fourth terminal (720) is connected to the second capacitor core (310) through the second copper bar (320). The third terminal (710) and the second connection terminal (730) are located at the second end of the second relay (700). The third terminal (710) is used to connect to an AC circuit. The first connection terminal (630) is connected to the second relay (700) through the second connection terminal (730), and the second connection terminal (730) is connected to the second external terminal (750).

7. The motor control system according to claim 1, wherein It further includes an external copper bar (500). One end of the external copper bar (500) is provided with a third external terminal (510). The third external terminal (510) is connected to the third terminal (710) of the second relay (700) through the external copper bar (500), and the third external terminal (510) is used to connect to an AC circuit.

8. The motor control system according to claim 7, wherein When the first voltage is applied to the third external terminal (510), both the first coil (640) of the first relay (600) and the second coil (740) of the second relay (700) are in the attracted state, and the second external terminal (750) is the positive extreme of the DC circuit. When the second voltage is applied to the third external terminal (510), the first coil (640) of the first relay (600) is in the attracted state and the second coil (740) of the second relay (700) is in the separated state, and the second external terminal (750) is the positive extreme of the DC circuit. When the third voltage is applied to the third external terminal (510), the first coil (640) of the first relay (600) is in the separated state and the second coil (740) of the second relay (700) is in the attracted state, and the second external terminal (750) is the positive extreme of the DC circuit.

9. The motor control system according to claim 4, wherein A fourth external terminal (130) is further provided on the housing (100). The negative extreme of the DC circuit is connected to the third copper bar (400) through the fourth external terminal (130).

10. The motor control system according to claim 8, characterized in that, The housing (100) is provided with a first signal terminal (140) and a second signal terminal (150). The first signal terminal (140) is connected to the first relay (600), and the first coil (640) of the first relay (600) is controlled to be attracted or separated by receiving a signal through the first signal terminal (140). The second signal terminal (150) is connected to the second relay (700), and the second coil (740) of the second relay (700) is controlled to be attracted or separated by receiving a signal through the second signal terminal (150).

11. The motor control system according to claim 3, characterized in that, It further includes a first lead (910). The first lead (910) is connected to the first copper bar (220) of the bus capacitor (200), and the first lead (910) is used to collect voltage data of the bus capacitor (200).

12. The motor control system according to claim 7, wherein, It further includes a second lead (920). The second lead (920) is connected to the external copper bar (500), and the second lead (920) is used to collect voltage data of the external copper bar (500).

13. The motor control system according to claim 4, characterized in that, The housing (100) is further provided with a positive terminal (110) and a negative terminal (120). Both the first copper bar (220) and the second copper bar (320) are connected to the positive terminal (110), and the third copper bar (400) is connected to the negative terminal (120).

14. The motor control system according to claim 13, characterized in that The housing (100) is provided with a slot (160) for accommodating an insulated gate bipolar transistor. The collector of the insulated gate bipolar transistor is connected to the positive terminal (110) on the housing (100), and the emitter of the insulated gate bipolar transistor is connected to the negative terminal (120) on the housing (100).

15. The motor control system according to claim 14, characterized in that, A cooling channel is provided inside the housing (100), and the cooling channel is used to dissipate heat from the insulated gate bipolar transistor and the accommodation cavity.

16. The motor control system according to claim 15, characterized in that, The housing (100) is provided with a water inlet hole (170) and a water outlet hole (180). The water inlet hole (170) is arranged at one end of the cooling channel, and the water outlet hole (180) is arranged at the other end of the cooling channel.

17. An electrical device, characterized in that, It includes: An electrical device, and the motor control system according to any one of claims 1-16 above, where the motor control system is used to provide a stable voltage for the electrical device; And / or, the motor control system is used to provide a stable current for the electrical device.

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