Motor control system and electric device

Abstract

The present disclosure relates to the technical field of electronic components, and provides a motor control system and an electric device. The motor control system comprises a housing, a bus capacitor, a boost capacitor, a first relay, and a second relay. Components such as the bus capacitor, the boost capacitor, the first relay, and the second relay are highly integrated within an accommodating cavity of the housing, thereby maximizing space utilization within the housing and enabling lightweight design, convenient installation and maintenance. The bus capacitor and the boost capacitor can stabilize voltage fluctuations, and can also enhance the flexibility of voltage regulation, thereby meeting diverse load requirements. By controlling the first relay and the second relay, the bus capacitor and the boost capacitor can flexibly regulate voltages on the basis of specific loads, thereby increasing response speed and optimizing energy efficiency.

Description

Motor control system and electric device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202422420314.9, filed on September 30, 2024, and entitled "Motor control system and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] Embodiments of the present disclosure relate to the technical field of electronic components, in particular to a motor control system and an electric device. BACKGROUND

[0004] With the rapid development of the electric vehicle industry, electric vehicle component technology is also constantly iterating towards lightweight and integration. Metalized film capacitors are used in parallel between the power supply and the power module to perform AC filtering and voltage smoothing.

[0005] However, conventional vehicle-mounted metalized film capacitors have simple structure and single function. Typically, capacitors for filtering and capacitors for support, as well as other electronic components, are assembled separately, which occupies a large volume, has low space utilization, and has a complicated assembly process. SUMMARY

[0006] Embodiments of the present disclosure provide a motor control system and an electric device, 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 smooth the output voltage fluctuation of the DC power supply, improving the power supply quality. The boost capacitor can be used for DC support to provide additional voltage support to meet the demand for high voltage or high power output. By attracting and separating the coils of the two relays, the merging and isolation of the bus capacitor and the boost capacitor are controlled, realizing efficient management and protection of the DC power supply to adapt to the needs of more working conditions.

[0007] Embodiments of the present disclosure provide the following technical solutions to solve the above technical problems:

[0008] Firstly, the present disclosure provides a motor control system, comprising:

[0009] a housing, the housing having a receiving cavity therein, the housing being provided with a first external terminal and a second external terminal;

[0010] a bus capacitor, the bus capacitor being located in the receiving cavity of the housing, the bus capacitor being used for smoothing voltage and AC filtering;

[0011] a boost capacitor, the boost capacitor being located in the accommodating cavity of the shell, the boost capacitor being used to adjust voltage to meet load demand;

[0012] a first relay, the first relay being located in the accommodating cavity of the shell, a first end of the first relay being connected with the bus capacitor, a second end of the first relay being connected with the first external terminal, the first external terminal being connected with an external circuit;

[0013] a second relay, the second relay being located in the accommodating cavity of the shell, a first end of the second relay being connected with the boost capacitor, a second end of the second relay being connected with the second external terminal, the second external terminal being a positive terminal of a direct current circuit processed by the boost capacitor.

[0014] The motor control system provided by the embodiments of the present disclosure comprises a shell, a bus capacitor, a boost capacitor, a first relay and a second relay. The shell has an accommodating cavity therein, and the bus capacitor, the boost capacitor, the first relay and the second relay are located in the accommodating cavity of the shell. The bus capacitor, the boost capacitor, the first relay and the second relay are compactly arranged in the accommodating cavity of the shell through high integration design, thereby effectively reducing external connection, reducing complexity and failure rate, maximizing the space utilization rate in the shell, and realizing lightweight installation and maintenance. Moreover, the accommodating cavity of the shell is isolated from the external harsh environment, thereby improving the durability of the internal components and ensuring stable operation under various working conditions. Specifically, an external circuit is connected with the first relay through a first external terminal on the shell, and the bus capacitor is controlled by the first relay, so as to realize the functions of smoothing voltage and AC filtering. A second external terminal on the shell is a positive terminal of a direct current circuit, and the second external terminal is connected with the second relay, and the boost capacitor is controlled by the second relay, so as to adjust voltage to meet load demand.

[0015] In a possible implementation, a protection circuit is further included, the protection circuit being located between a negative terminal of the direct current circuit and the bus capacitor, and / or the protection circuit being located between the negative terminal of the direct current circuit and the boost capacitor;

[0016] The boost capacitor, the bus capacitor, the protection circuit and the at least two relays are integrated into one in the accommodating cavity of the shell.

[0017] In a possible implementation, the bus capacitor comprises a first copper bar and a plurality of first capacitor cores, the plurality of first capacitor cores being located in the accommodating cavity, and one end of each of the first capacitor cores being connected with the first end of the first relay through the first copper bar.

[0018] The voltage boosting capacitor comprises a second copper bar and a plurality of second capacitor cores, the plurality of second capacitor cores are located in the accommodating cavity, and one end of each of the second capacitor cores is connected with the first end of the second relay through the second copper bar.

[0019] In a possible implementation, a third copper bar is further included, the other end of each of the first capacitor cores and the other end of each of the second capacitor cores are connected with the third copper bar, and the third copper bar is connected with the negative terminal of the direct current circuit through a protection circuit.

[0020] In a possible implementation, the first relay comprises a first terminal, a second terminal, a first connecting terminal and a first coil, the second terminal is located at the first end of the first relay, and the second terminal is connected with the first capacitor core through the first copper bar.

[0021] The first terminal and the first connecting terminal are located at the second end of the first relay, the first terminal is connected with the first external terminal, and the first connecting terminal is used to be connected with the second relay.

[0022] In a possible implementation, the second relay comprises a third terminal, a fourth terminal, a second connecting terminal and a second coil, the fourth terminal is located at the first end of the second relay, and the fourth terminal is connected with the second capacitor core through the second copper bar.

[0023] The third terminal and the second connecting terminal are located at the second end of the second relay, the third terminal is used to be connected with the alternating current circuit, the first connecting terminal is connected with the second relay through the second connecting terminal, and the second connecting terminal is connected with the second external terminal.

[0024] In a possible implementation, an external copper bar is further included, one end of the external copper bar is provided with a third external terminal, the third external terminal is connected with the third terminal of the second relay through the external copper bar, and the third external terminal is used to be connected with the alternating current circuit.

[0025] In a possible implementation, when the third external terminal is connected with a first voltage, the first coil of the first relay and the second coil of the second relay are both in an attracted state, and the second external terminal is a positive terminal of the direct current circuit.

[0026] When the third external terminal is connected with a second voltage, the first coil of the first relay is in an attracted state, the second coil of the second relay is in a separated state, and the second external terminal is a positive terminal of the direct current circuit.

[0027] When the third external terminal is connected to a third voltage, the first coil of the first relay is in a disengaged state and the second coil of the second relay is in an attracted state, and the second external terminal is a positive terminal of a direct current circuit.

[0028] In a possible implementation, the shell further has a fourth external terminal, and a negative terminal of the direct current circuit is connected to the third copper bar through the fourth external terminal.

[0029] In a possible implementation, the shell has a first signal terminal and a second signal terminal, the first signal terminal is connected to the first relay, and a signal received through the first signal terminal is used to control the first coil of the first relay to be attracted or disengaged.

[0030] The second signal terminal is connected to the second relay, and a signal received through the second signal terminal is used to control the second coil of the second relay to be attracted or disengaged.

[0031] In a possible implementation, the shell further has a first lead wire connected to the first copper bar of the bus capacitor, and the first lead wire is used to collect voltage data of the bus capacitor.

[0032] In a possible implementation, the shell further has a second lead wire connected to the external copper bar, and the second lead wire is used to collect voltage data of the external copper bar.

[0033] In a possible implementation, the shell further has a positive terminal and a negative terminal, the first copper bar and the second copper bar are connected to the positive terminal, and the third copper bar is connected to the negative terminal.

[0034] In a possible implementation, the shell has a slot for accommodating an insulated gate bipolar transistor, a collector of the insulated gate bipolar transistor is connected to a positive terminal of the shell, and an emitter of the insulated gate bipolar transistor is connected to a negative terminal of the shell.

[0035] In a possible implementation, the shell has a cooling channel in the interior of the shell, and the cooling channel is used to dissipate heat for the insulated gate bipolar transistor and the accommodating cavity.

[0036] In a possible implementation, the shell has a water inlet hole and a water outlet hole, the water inlet hole is arranged at one end of the cooling channel, and the water outlet hole is arranged at the other end of the cooling channel.

[0037] In a second part, the disclosure provides a power utilization device, including:

[0038] The electric device, and the motor control system described above is used to provide stable voltage for the electric device.

[0039] And / or, the motor control system is used to provide stable current for the electric device.

[0040] In addition to the technical problems solved by the present disclosure described above, the technical features constituting the technical solutions and the beneficial effects brought by these technical features, the other technical problems solved by the motor control system and the electric device provided by the present disclosure, the other technical features included in the technical solutions and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the description of the embodiments of the present disclosure or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only a part of the embodiments of the present disclosure, and these drawings and the written description are not intended to limit the scope of the present disclosure in any way by any means, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. Those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0042] Fig. 1 is a structural schematic diagram of the motor control system provided by the embodiment of the present disclosure;

[0043] Fig. 2 is a front view schematic diagram of the internal structure of the motor control system provided by the embodiment of the present disclosure;

[0044] Fig. 3 is a back view schematic diagram of the internal structure of the motor control system provided by the embodiment of the present disclosure.

[0045] Explanation of reference signs: 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; 200 - bus capacitor; 210 - first capacitor core; 220 - first copper bar; 300 - boost capacitor; 310 - second capacitor core; 320 - second copper bar; 400 - third copper bar; 500 - external copper bar; 510 - third external terminal; 600 - first relay; 610 - first terminal; 620 - second terminal; 630 - first connection terminal; 640 - first coil; 650 - first external terminal; 700 - second relay; 710 - third terminal; 720 - fourth terminal; 730 - second connection terminal; 740 - second coil; 750 - second external terminal; 800 - protection circuit; 910 - first lead wire; 920 - second lead wire. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0047] The embodiments of the present disclosure provide a power-using device. The power-using device includes a power-using apparatus and a battery system. The battery system provides electric energy for the power-using apparatus. For example, the power-using device can be a vehicle or a power storage device. When the power-using device is a vehicle, the vehicle can be a new energy vehicle, such as a pure electric vehicle (PEV / BEV), a range extended electric vehicle (REEV), a hybrid electric vehicle (HEV), or a fuel cell electric vehicle. The vehicle can also be any vehicle with a battery.

[0048] The electric device can also be a motor, a control system, a lighting system, etc. When the electric device is a kind of energy storage device, the electric device can be an inverter, a controller, etc. The battery system can be a kind of battery pack, which includes a plurality of batteries. In a possible implementation, the batteries can be cylindrical batteries, or the batteries can be square case batteries, or the batteries can have a plurality of battery cells inside. Moreover, the plurality of batteries can store and output electric energy through a certain connection mode and a control system, and the battery pack or the batteries can provide electric energy for the electric device to meet the normal operation of the device.

[0049] The battery can be a primary battery or a secondary battery. The primary battery refers to a battery that cannot be restored to its use state by charging after completing the discharging process. The secondary battery refers to a battery type that can continue to be used by activating the internal active material through charging means after completing the discharging. The battery can be a lithium ion battery or a sodium ion battery or a lithium-sulfur battery, etc. Moreover, the form of the battery can be a square case or a cylinder or a soft package or other shaped battery.

[0050] The motor control system provided by the embodiments of the present disclosure includes a shell 100, a bus capacitor 200, a first relay 600, and a second relay 700, as shown in FIGS. 1 and 3. The shell 100 has a receiving cavity inside, and the shell 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 shell 100, and the bus capacitor 200 is used to smooth the voltage. The boost capacitor 300 is located in the receiving cavity of the shell 100. The first relay 600 is located in the receiving cavity of the shell 100, the first end of the first relay 600 is connected with the bus capacitor 200, the second end of the first relay 600 is connected with the first external terminal 650, and the first external terminal 650 is used to be connected with an external circuit. The second relay 700 is located in the receiving cavity of the shell 100, the first end of the second relay 700 is connected with the boost capacitor 300, and the second end of the second relay 700 is connected with the second external terminal 750. The second external terminal 750 is the positive terminal of the direct current circuit after being processed by the boost capacitor 300.

[0051] The shell 100 has a receiving cavity inside, and the bus capacitor 200, the boost capacitor 300, the first relay 600, and the second relay 700 are located in the receiving cavity. This can effectively prevent the invasion of external dust, moisture, vibration, and other adverse factors on 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 shell 100 can be maximized, ensuring that all components can be placed compactly and orderly, avoiding waste of space, and making the internal motor control system more integrated. The shell 100 can be made of an aluminum alloy shell, but is not limited to an aluminum alloy material. The material and size of the shell can be adjusted according to actual working conditions.

[0052] The bus capacitor 200 is used for smoothing voltage, and by storing and releasing charges, voltage fluctuations caused by load fluctuations or power instability in the direct current circuit can be effectively reduced, thereby providing a stable voltage environment for the entire power consumption system. The boost capacitor 300 can realize voltage regulation of the motor control system, and 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, so as to meet the voltage requirements of the load and improve the flexibility and adaptability of the system.

[0053] The bus capacitor 200, the boost capacitor 300, the first relay 600 and the second relay 700 are integrated in the shell 100, the first relay 600 is connected with the bus capacitor 200, the second relay 700 is connected with the boost capacitor 300, and 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 are realized, which can be more finely controlled to meet the needs of specific loads.

[0054] It should be noted that in the example of the present disclosure, the direct current circuit can be a battery pack, the external alternating current circuit is connected to the third external terminal 510 of the external copper bar 500 of the motor control system, and the alternating voltage is regulated and filtered by the bus capacitor 200 and the boost capacitor 300. The second external terminal 750 is the positive terminal of the direct current circuit, and the fourth external terminal 130 is the negative terminal of the direct current circuit. The first external terminal 650 is connected with the external circuit, and the bus capacitor is used to smooth the bus voltage, improve the voltage stability and reduce the voltage fluctuation. It can be understood that the alternating current is connected to the third external terminal 510, and the positive terminal of the battery pack is connected to the second external terminal 750 and the negative terminal of the battery pack is connected to the fourth external terminal 130, so as to realize direct current charging of the battery pack.

[0055] In some embodiments of the present disclosure, as shown in FIGS. 2 and 3, the motor control system further comprises a protection circuit 800, the protection circuit 800 is located between the negative terminal of the direct current circuit and the bus capacitor 200, and / or the protection circuit 800 is located between the negative terminal of the direct current 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 in the accommodating cavity of the shell 100.

[0056] In the example of the present disclosure, 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 adaptively adjusted according to the space in the accommodating cavity. The protection circuit 800 can be a 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 of overcurrent protection, ensures the operation safety of the motor control system, and can be fused in time when the motor control system is abnormal, so as to cut off the circuit and prevent the occurrence of safety accidents such as equipment damage or fire.

[0057] In some embodiments of the present disclosure, as shown in FIGS. 2 and 3, the boost capacitor 300 includes the first copper bar 220 and a plurality of first capacitor cores 210, the plurality of first capacitor cores 210 are located in the accommodating 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 the second copper bar 320 and a plurality of second capacitor cores 310, the plurality of second capacitor cores 310 are located in the accommodating 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. 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 connected to the third copper bar 400, and the third copper bar 400 is connected to the negative electrode end of the direct current circuit through the protection circuit 800.

[0058] It can be understood that one end of each first capacitor core 210 is connected to the first copper bar 220, and the first capacitor core 210 can be fixed. One end of each second capacitor core 310 is connected to the second copper bar 320, and the first capacitor core 210 and the second capacitor core 310 can be fixed 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 electrically connected to the third copper bar 400, and the third copper bar 400 serves as a common negative electrode and connects the other ends of all first capacitor cores 210 and second capacitor cores 310.

[0059] In the embodiments of the present disclosure, the number of first capacitor cores 210 of the bus capacitor 200 is nine, one end of each of the nine first capacitor cores 210 is electrically connected to the first copper bar 220, and the other end of each of the nine first capacitor cores 210 is electrically connected to the third copper bar 400. The number of second capacitor cores 310 of the boost capacitor 300 is three, one end of each of the three second capacitor cores 310 is electrically connected to the second copper bar 320, and the other end of each of the three second capacitor cores 310 is electrically connected to the third copper bar 400.

[0060] It should be noted that the number of the first capacitor core 210 and the second capacitor core 310 can be the above distribution, but is not limited to the above distribution, for example, the number of the first capacitor core 210 can also be twelve, and the number of the second capacitor core 310 can also be six. The size, number, arrangement and capacity value of the first capacitor core 210 and the second capacitor core 310 can be adjusted according to the actual structure of the shell and the demand of the power parameter.

[0061] In the examples of the present disclosure, the first capacitor core 210 and the second capacitor core 310 can be a thin film capacitor core composed of a metal thin film and a non-metal thin film, the metal thin film as an electrode, and the non-metal thin film as a 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 laminated type, which is not limited here. The material and size of the metal thin film and the non-metal thin film are not described here, and can be selected according to actual needs.

[0062] In some embodiments of the present disclosure, as shown in FIGS. 2 and 3, the first relay 600 includes a first terminal 610, a second terminal 620, a first connecting 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 with the first capacitor core 210 through the first copper bar 220. The first terminal 610 and the first connecting terminal 630 are located at the second end of the first relay 600, the first terminal 610 is connected with the first external terminal 650, and the first connecting terminal 630 is used to be connected with the second relay 700.

[0063] It can be understood that the first coil 640 is a component in the first relay 600 for controlling the closing or opening between the first terminal 610 and the first connecting terminal 630 located at the second end and the second terminal 620 located at the first end. The second terminal 620 is connected with the first capacitor core 210 through the 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 with the first external terminal 650 on the shell 100, which can be used to connect the bus capacitor of the motor control system to the external circuit, and realize the functions of alternating current filtering and smooth voltage. When the first signal terminal 140 on the shell 100 receives a control signal, the first coil 640 of the first relay 600 is attracted, so that the first terminal 610 and the second terminal 620 are closed or separated, to realize the precise control of the switching state of the first coil 640 in the first relay 600.

[0064] In some embodiments of the present disclosure, as shown in FIG. 2 and FIG. 3, the second relay 700 includes a third terminal 710, a fourth terminal 720, a second connecting 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 connecting terminal 730 are located at the second end of the second relay 700. The third terminal 710 is used to be connected to an AC circuit. The first connecting terminal 630 is connected to the second relay 700 through the second connecting terminal 730, and the second connecting terminal 730 is connected to a second external terminal 750.

[0065] It can be understood that the second coil 740 is a component in the second relay 700 for controlling the closing or opening between the third terminal 710 at the second end, the second connecting terminal 730, and the fourth terminal 720 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 shell 100 through the second connecting terminal 730, which can be used for the positive terminal of the external DC circuit to be connected, so as to realize the adjustment of the voltage to meet the voltage demand of the load. When the second signal terminal 150 on the shell 100 receives a control signal, the second coil 740 of the second relay 700 is attracted, so as to make the third terminal 710 and the fourth terminal 720 close or separate, so as to realize the precise control of the switching state of the second relay 700.

[0066] It can be understood that the first relay 600 and the second relay 700 are connected through the first connecting terminal 630 and the second connecting terminal 730, so as to realize the cooperation between the first relay 600 and the second relay 700, realize the complex control logic, and meet the voltage demand of the load.

[0067] The third terminal 710 of the second relay 700 is connected to the second external terminal 750 on the shell 100 through the second connecting terminal 730, and the second external terminal can be used as the positive terminal of the DC circuit. For example, the first connecting terminal 630 of the first relay 600 and the second connecting terminal 730 of the second relay 700 can be electrically connected through a metal connecting piece, so as to realize the power transmission between the first relay 600 and the second relay 700. In the embodiments of the present disclosure, the first connecting terminal 630 of the first relay 600 is close to the second connecting terminal 730 of the second relay 700, which is beneficial to reduce the connection length between the first relay 600 and the second relay 700, reduce the resistance and line loss, and facilitate the installation and maintenance, but is not limited to the connection layout shown in the figure, which is not limited herein.

[0068] In some embodiments of the present disclosure, as shown in FIGS. 2 and 3, the motor control system further comprises 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 be connected to an alternating current circuit. For example, when the battery pack is charged by an external power supply, the external alternating current is connected to the third external terminal 510 of the external copper bar 500, and 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 according to the voltage data collected by the second lead 920 connected to the external copper bar 500, to perform smooth voltage and alternating current filtering, and to control the voltage to meet the charging demand of the battery pack.

[0069] In a possible implementation, when the third external terminal 510 is connected to the first voltage, the first coil 640 of the first relay 600 and the second coil 740 of the second relay 700 are both in the attracted state, and the second external terminal 750 is the positive terminal of the direct current circuit. In another possible implementation, when the third external terminal 510 is connected to the second voltage, the first coil 640 of the first relay 600 is in the attracted state, the second coil 740 of the second relay 700 is in the separated state, and the second external terminal 750 is the positive terminal of the direct current circuit. In another possible implementation, when the third external terminal 510 is connected to the third voltage, the first coil 640 of the first relay 600 is in the separated state, the second coil 740 of the second relay 700 is in the attracted state, and the second external terminal 750 is the positive terminal of the direct current circuit. It can be understood that the charging demand of the battery pack is met by controlling the connection of different terminals.

[0070] As shown in FIG. 3, in the example of the present disclosure, the bus capacitor 200 provides a capacity of 560 microfarads of nine first capacitor cores 210, and the boost capacitor 300 provides a capacity of 150 microfarads of three second capacitor cores 310, but is not limited to the above-mentioned capacity. The shell 100 of the motor control system is provided with six external terminals, which are the positive terminal 110, the negative terminal 120, the first external terminal 650, the second external terminal 750, the third external terminal 510 and the fourth external terminal 130. The external circuit is connected to the bus capacitor 200 through the first external terminal 650 to achieve smooth voltage and alternating current 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 demand, the second external terminal 750 is the positive terminal of the direct current circuit, the fourth external terminal 130 is the negative terminal of the direct current circuit, and the third external terminal 510 is the connection terminal of the alternating current circuit.

[0071] In a possible implementation, when the voltage inputted by the external AC power source into the third external terminal 510 of the external copper bar 500 is a first voltage, the second lead 920 identifies the first voltage and controls 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 voltage of the first connection terminal 630 and the second connection terminal 730 is the same. The common negative third copper bar 400 connected with the first capacitor core 210 of the bus capacitor 200 and the second capacitor core 310 of the boost capacitor 300 is connected with the fourth external terminal 130, the second external terminal 750 is the positive terminal of the direct current circuit, the fourth external terminal 130 is the negative terminal of the direct current circuit, and is connected with the positive and negative poles of the battery pack respectively, thereby meeting the charging voltage requirement of the battery pack.

[0072] In another possible implementation, when the voltage inputted by the external power source into the third external terminal 510 of the external copper bar 500 is a second voltage, the second lead 920 identifies the second control voltage and controls the first coil 640 of the first relay 600 to be in the attracted state and the second coil 740 of the second relay 700 to be 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 terminal of the direct current circuit, and the fourth external terminal 130 is the negative terminal of the direct current circuit, and is connected with the positive and negative poles of the battery pack respectively, thereby meeting the charging voltage requirement of the battery pack. In another possible implementation, when the voltage inputted by the external power source into the third external terminal 510 of the external copper bar 500 is a third voltage, the second lead 920 identifies the third voltage and controls the second coil 740 of the second relay 700 to be in the separated state and the first coil 640 of the first relay 600 to be 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 terminal of the direct current circuit, and the fourth external terminal 130 is the negative terminal of the direct current circuit, and is connected with the positive and negative poles of the battery pack respectively, thereby meeting the charging voltage requirement of the battery pack.

[0073] The first relay 600 and the second relay 700 receive external control signals and 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 respectively, thereby realizing the regulation of the voltage. In a possible implementation, when the voltage inputted by the third external terminal 510 at the end of the external copper bar 500 cannot meet the charging requirement of the battery pack, 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 by receiving the electrical signal, thereby realizing the parallel connection of the bus capacitor 200 and the boost capacitor 300. The voltage of the external power source can be raised by the bus capacitor 200 and the boost capacitor 300, and the fourth external terminal 130 and the second external terminal 750 are the negative and positive terminals of the boosted direct current voltage respectively.

[0074] In some embodiments of the present disclosure, as shown in FIGS. 1 and 2, 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.

[0075] It can be understood that the first signal terminal 140 is connected to the first relay 600. When the 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 first coil 640 to be attracted or separated. 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 second coil 740 of the second relay 700 to be attracted or separated. In this way, the first relay 600 and the second relay 700 can work independently according to external instructions, or work cooperatively to achieve more complex circuit control logic.

[0076] In some embodiments of the present disclosure, as shown in FIGS. 1 and 2, the motor control system further comprises a first lead wire 910 and a second lead wire 920. The first lead wire 910 is connected to the first copper bar 220 of the bus capacitor 200, and the first lead wire 910 is used to collect voltage data of the bus capacitor 200. The second lead wire 920 is connected to the external copper bar 500, and the second lead wire 920 is used to collect voltage data of the external copper bar 500.

[0077] It can be understood that the first lead wire 910 is connected to the first copper bar 220 of the bus capacitor 200. The voltage data collected by the first lead wire 910 can be used to monitor the working state of the bus capacitor 200 in real time, and ensure that the bus capacitor 200 operates within a safe range. The second lead wire 920 is connected to the external copper bar 500. By collecting voltage data on the external copper bar 500 through the second lead wire 920, the attraction or separation state of the first coil 640 and the second coil 740 controlled by the first signal terminal 140 and the second signal terminal 150 can be determined according to the voltage information collected by the second lead wire 920, so as to meet the load demand of the external circuit.

[0078] In some embodiments of the present disclosure, as shown in FIGS. 1 and 2, the shell 100 is further provided with a positive terminal 110 and a negative terminal 120, 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. The shell 100 is further provided with a slot 160 for accommodating an insulated gate bipolar transistor (IGBT), the collector of the IGBT is connected to the positive terminal 110 on the shell 100, the emitter of the IGBT is connected to the negative terminal 120 on the shell 100, and the gate of the IGBT is connected to a driving circuit for receiving a signal to control the IGBT.

[0079] It can be understood that the shell 100 is provided with a slot 160 for accommodating an IGBT. The number and size of the slots 160 on the shell 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 switching. By connecting the IGBT to the motor control system, the energy generated during the switching process of the IGBT 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. The collector of the IGBT is connected to the positive terminal 110 on the shell 100, and the emitter of the IGBT is connected to the negative terminal 120 on the shell 100 to ensure that the IGBT can be correctly connected to the circuit. By connecting to the 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.

[0080] In some embodiments of the present disclosure, the inside of the shell 100 is provided with a cooling channel (not shown in the figure), which is used to dissipate heat for the IGBT and the boost capacitor 300, the bus capacitor 200, the protection circuit 800, the first relay 600, and the second relay 700 located in the accommodating cavity. As shown in FIG. 3, the shell 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.

[0081] It can be understood that in a high-power power conversion system, the IGBT, the boost capacitor 300, the bus capacitor 200, the protection circuit 800, and the first relay 600 and the second relay 700 generate a large amount of heat during operation. In order to ensure the stable operation of the above-mentioned elements and prolong their service life, the cooling channel is arranged inside the shell 100, and the water inlet hole 170 and the water outlet hole 180 are connected to the external cooling system to form an effective heat dissipation system.

[0082] In one possible implementation, the cooling channel inside the shell 100 has a first channel and a second channel, and the first channel is connected with the second channel, the first channel is used for dissipating heat for the boost capacitor 300, the bus capacitor 200, the protection circuit 800, the first relay 600 and the second relay 700 in the accommodation cavity, and the second channel is used for dissipating heat for the IGBT. The water inlet hole 170 and the water outlet hole 180 can be respectively arranged at two ends of the first cooling channel, the cooling liquid passes through the first channel and the second channel to take away heat, so as to prevent the components from overheating and keep the working temperature of the components within the allowable range.

[0083] Wherein, the terms such as "upper", "lower" and the like are used to describe the relative positional relationship of various structures in the drawings, and are only for the convenience of clear description, and do not limit the scope of the disclosure, and the change or adjustment of the relative relationship is also regarded as the scope of the disclosure without substantially changing the technical content.

[0084] It should be noted that: in the disclosure, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0085] In addition, in the disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the disclosure can be understood according to the specific circumstances.

[0086] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the disclosure. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the present disclosure; although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

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

2. The motor control system according to claim 1, further comprising a protection circuit (800) located between a negative terminal of the direct current circuit and the bus capacitor (200), and / or the protection circuit (800) is located between the negative terminal of the direct current 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 in the receiving cavity of the housing (100).

3. The motor control system according to claim 1 or 2, the bus capacitor (200) comprising a first copper bar (220) and a plurality of first capacitor cores (210), the plurality of first capacitor cores (210) being located in the receiving cavity, one end of each of the first capacitor cores (210) being connected to the first end of the first relay (600) through the first copper bar (220); the boost capacitor (300) comprising a second copper bar (320) and a plurality of second capacitor cores (310), the plurality of second capacitor cores (310) being located in the receiving cavity, one end of each of the second capacitor cores (310) being 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, further comprising a third copper bar (400), the other end of each of the first capacitor core (210) and the other end of each of the second capacitor core (310) are connected to the third copper bar (400), and the third copper bar (400) is connected to the negative terminal of the DC circuit through a protection circuit (800).

5. The motor control system according to claim 3 or 4, the first relay (600) comprises a first terminal (610), a second terminal (620), a first connecting 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 connecting 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 connecting terminal (630) is used to be connected to the second relay (700).

6. The motor control system according to claim 5, the second relay (700) comprises a third terminal (710), a fourth terminal (720), a second connecting 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 connecting terminal (730) are located at the second end of the second relay (700), the third terminal (710) is used to be connected to the AC circuit, the first connecting terminal (630) is connected to the second relay (700) through the second connecting terminal (730), and the second connecting terminal (730) is connected to the second external terminal (750).

7. The motor control system according to any one of claims 1-6, further comprising 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 be connected to the AC circuit.

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

9. The motor control system according to claim 4, wherein the housing (100) is further provided with a fourth external terminal (130), and the negative terminal of the direct current circuit is connected to the third copper bar (400) through the fourth external terminal (130).

10. The motor control system according to claim 8, wherein 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 through the first signal terminal (140) receiving signals; 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 through the second signal terminal (150) receiving signals.

11. The motor control system according to any one of claims 3-6, further comprising a first lead wire (910), the first lead wire (910) is connected to the first copper bar (220) of the bus capacitor (200), and the first lead wire (910) is used to collect voltage data of the bus capacitor (200).

12. The motor control system according to any one of claims 7, 8, 10, further comprising a second lead wire (920), the second lead wire (920) is connected to the external copper bar (500), and the second lead wire (920) is used to collect voltage data of the external copper bar (500).

13. The motor control system according to claim 4, wherein the housing (100) is further provided with a positive terminal (110) and a negative terminal (120), the first copper bar (220) and the second copper bar (320) are both 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, wherein the housing (100) is provided with a slot (160), 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) of the housing (100), and the emitter of the insulated gate bipolar transistor is connected to the negative terminal (120) of the housing (100).

15. The motor control system according to claim 14, wherein the housing (100) is internally provided with a cooling channel for dissipating heat from the insulated gate bipolar transistor and the accommodating cavity.

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

17. An electric device, comprising: an electric device, and the motor control system according to any one of claims 1-16, the motor control system being configured to provide a stable voltage to the electric device; and / or the motor control system being configured to provide a stable current to the electric device. ​

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