Control circuit, domain controller and whole vehicle

Abstract

The utility model discloses a control circuit, a domain controller and a whole vehicle. The control circuit is used for controlling at least two direct-current brush motors; the control circuit comprises a plurality of half-bridge circuits, one end of each DC brush motor is connected with the power supply end through the half-bridge circuit, and one ends of at least two DC brush motors share the same half-bridge circuit; and the half-bridge circuit is used for controlling connection or disconnection between one end of the direct-current brush motor and the power supply end. According to the utility model, the number of the required half-bridge circuits can be reduced when the number of the direct-current brush motors is fixed, so that the cost of the control circuit can be reduced, the space occupied by the H-bridge circuit can be reduced, and the space occupied by the control circuit can be reduced.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of vehicle control, and in particular, to a control circuit, a domain controller, and a whole vehicle. Background Art

[0002] In recent years, the electronic and electrical architecture of new energy vehicles has been developing towards domain controllers, including power domain, cockpit domain, chassis domain, thermal management domain, and body domain, etc. The direct current machine (DCM) is widely used in vehicles, such as electronic water valves, windows, etc. Therefore, with the development of domain controllers, there will inevitably be a situation where one controller controls multiple direct current brushed motors.

[0003] The traditional discrete controller uses a single control chip plus an H-bridge circuit to realize the forward and reverse control of a single direct current brushed motor. After the emergence of domain controllers, a single control chip plus multiple H-bridge circuits can be used to control multiple direct current brushed motors. At this time, the required H-bridge circuits are relatively many, which need to occupy a relatively large space and are not conducive to the size control and cost control of domain controllers. Content of the Utility Model

[0004] The present utility model provides a control circuit, a domain controller, and a whole vehicle to reduce the occupied space of the control circuit and lower the cost of the control circuit.

[0005] In a first aspect, the embodiments of the present utility model provide a control circuit for controlling at least two direct current brushed motors; the control circuit includes a plurality of half-bridge circuits, one end of each direct current brushed motor is connected to a power supply terminal through one of the half-bridge circuits, and one end of at least two direct current brushed motors shares the same half-bridge circuit; the half-bridge circuit is used to control the conduction or cut-off of one end of the direct current brushed motor and the power supply terminal.

[0006] Optionally, the first end of the direct current brushed motor is connected to one of the half-bridge circuits, and the second end of the direct current brushed motor is connected to another half-bridge circuit; one end of at least two direct current brushed motors, either the first end or the second end, shares one half-bridge circuit, or, among at least two direct current brushed motors, the first end of one direct current brushed motor shares one half-bridge circuit with the second end of another direct current brushed motor, or, when the control circuit is used to control at least three direct current brushed motors, one end of some direct current brushed motors, either the first end or the second end, shares one half-bridge circuit, and among some direct current brushed motors, the first end of one direct current brushed motor shares one half-bridge circuit with the second end of another direct current brushed motor.

[0007] Optionally, the half-bridge circuit includes at least two first half-bridge circuits and one second half-bridge circuit. The first ends of each of the DC brushed motors are respectively connected to different ones of the first half-bridge circuits, and the second ends of all the DC brushed motors are connected to the second half-bridge circuit; wherein, the number of the first half-bridge circuits is equal to the number of the DC brushed motors.

[0008] Optionally, the first end of the DC brushed motor is connected to one of the half-bridge circuits, the second end of the DC brushed motor is connected to another half-bridge circuit, and the first end of each DC brushed motor shares one half-bridge circuit with the second end of a different DC brushed motor.

[0009] Optionally, when the control circuit is used to control at least three DC brushed motors, the DC brushed motors include at least two first DC brushed motors and at least one second DC brushed motor, and the half-bridge circuit includes at least two first half-bridge circuits and at least two second half-bridge circuits; the first ends of at least two of the first DC brushed motors are respectively connected to different ones of the first half-bridge circuits, the second ends of at least two of the first DC brushed motors are all connected to one of the second half-bridge circuits, the first end of at least one of the second DC brushed motors is connected to one of the second half-bridge circuits, the second end of at least one of the second DC brushed motors is connected to another one of the second half-bridge circuits, and the first end of each second DC brushed motor shares one of the second half-bridge circuits with the second end of a different second DC brushed motor.

[0010] Optionally, the half-bridge circuit includes a first controllable switch tube and a second controllable switch tube;

[0011] The first pole of the first controllable switch tube is connected to the first power supply terminal, the second pole of the first controllable switch tube is connected to the first pole of the second controllable switch tube and one end of the DC brushed motor, the second pole of the second controllable switch tube is connected to the second power supply terminal, the control pole of the first controllable switch tube is used to input a first control signal, and the control pole of the second controllable switch tube is used to input a second control signal.

[0012] Optionally, the first controllable switch tube and the second controllable switch tube are turned on in a time-sharing manner.

[0013] Optionally, the control circuit further includes a printed circuit board, and the half-bridge circuit is disposed on the printed circuit board.

[0014] In a second aspect, an embodiment of the present invention further provides a domain controller, including a control unit and the control circuit according to the first aspect; the control unit is connected to the control circuit, and the control unit is used to control the conduction state of the half-bridge circuit in the control circuit.

[0015] In a third aspect, an embodiment of the present utility model further provides a whole vehicle, including the domain controller described in the second aspect.

[0016] In the technical solution of the embodiment of the present utility model, by sharing the same half-bridge circuit at one end of at least two DC brushed motors, different H-bridge circuits can share one half-bridge circuit, so that when the number of DC brushed motors is fixed, the number of required half-bridge circuits can be reduced, thereby reducing the cost of the control circuit, and at the same time, the space occupied by the H-bridge circuit can be reduced, and the space occupied by the control circuit can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 9 is a schematic structural diagram of an integrated controller for controlling two DC brushed motors provided by the related art;

[0018] Figure 2 FIG. 13 is a schematic structural diagram of a control circuit provided by an embodiment of the present utility model;

[0019] Figure 3 FIG. 17 is a schematic structural diagram of another control circuit provided by an embodiment of the present utility model;

[0020] Figure 4 FIG. 21 is a schematic structural diagram of another control circuit provided by an embodiment of the present utility model;

[0021] Figure 5 FIG. 25 is a schematic structural diagram of another control circuit provided by an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0023] Figure 1 FIG. 34 is a schematic structural diagram of an integrated controller for controlling two DC brushed motors provided by the related art. As Figure 1As shown in the figure, the integrated controller includes two H-bridge circuits. The first H-bridge circuit includes a first MOS transistor MOS1, a second MOS transistor MOS2, a third MOS transistor MOS3, and a fourth MOS transistor MOS4. When the first MOS transistor MOS1 and the fourth MOS transistor MOS4 are turned on and the second MOS transistor MOS2 and the third MOS transistor MOS3 are turned off, the power supply provided by the power supply terminal VCC is output to the first end of the first DC brushed motor P1 through the first MOS transistor MOS1, and the second end of the first DC brushed motor P1 is grounded to GND through the fourth MOS transistor MOS4, causing the first DC brushed motor P1 to rotate forward. When the first MOS transistor MOS1 and the fourth MOS transistor MOS4 are turned off and the second MOS transistor MOS2 and the third MOS transistor MOS3 are turned on, the power supply provided by the power supply terminal VCC is output to the second end of the first DC brushed motor P1 through the third MOS transistor MOS3, and the second end of the first DC brushed motor P1 is grounded to GND through the second MOS transistor MOS2, causing the first DC brushed motor P1 to rotate in reverse. Similarly, the second H-bridge circuit includes a fifth MOS transistor MOS5, a sixth MOS transistor MOS6, a seventh MOS transistor MOS7, and an eighth MOS transistor MOS8. When the fifth MOS transistor MOS5 and the eighth MOS transistor MOS8 are turned on and the sixth MOS transistor MOS6 and the third MOS transistor MOS7 are turned off, the power supply provided by the power supply terminal VCC is output to the first end of the second DC brushed motor P2 through the fifth MOS transistor MOS5, and the second end of the second DC brushed motor P2 is grounded to GND through the eighth MOS transistor MOS8, causing the second DC brushed motor P2 to rotate forward. When the fifth MOS transistor MOS5 and the eighth MOS transistor MOS8 are turned off and the sixth MOS transistor MOS6 and the seventh MOS transistor MOS7 are turned on, the power supply provided by the power supply terminal VCC is output to the second end of the second DC brushed motor P2 through the seventh MOS transistor MOS7, and the second end of the second DC brushed motor P2 is grounded to GND through the sixth MOS transistor MOS6, causing the second DC brushed motor P1 to rotate in reverse. From the above process, it can be seen that when the integrated controller controls multiple DC brushed motors, each DC brushed motor needs to be correspondingly provided with an H-bridge circuit, so that the integrated controller requires a relatively large number of H-bridge circuits, which takes up a relatively large space and is not conducive to the size control and cost control of the domain controller.

[0024] In view of the above technical problems, an embodiment of the present invention provides a control circuit for controlling the forward and reverse rotations of at least two DC brushed motors. The control circuit includes a plurality of half-bridge circuits. One end of each DC brushed motor is connected to the power supply terminal through a half-bridge circuit, and one end of at least two DC brushed motors shares the same half-bridge circuit; the half-bridge circuit is used to control the conduction or cut-off of one end of the DC brushed motor and the power supply terminal.

[0025] Specifically, the power supply terminals may include a first power supply terminal and a second power supply terminal. The first power supply terminal and the second power supply terminal can provide different voltages to supply electrical energy to the DC brushed motor, drive the DC brushed motor to rotate, and drive the load to move. Exemplarily, the first power supply terminal can be the power supply terminal, and the second power supply terminal can be the ground terminal; or, the first power supply terminal can be the ground terminal, and the second power supply terminal can be the power supply terminal. When the DC brushed motor is applied to a whole vehicle, the load can be an electronic water valve, a window, etc. The first end of the half-bridge circuit can be connected to the first power supply terminal, and the second end of the half-bridge circuit can be connected to the second power supply terminal. The output terminal of each half-bridge circuit can be connected to at least one end of a DC brushed motor to control the conduction or cut-off between one end of the DC brushed motor and the first power supply terminal and the second power supply terminal. By setting both ends of each DC brushed motor to be connected to the output terminal of a half-bridge circuit respectively, the half-bridge circuits connected to both ends of the DC brushed motor can form an H-bridge circuit to control the forward and reverse rotation of the DC brushed motor. When at least two ends of the DC brushed motor share the same half-bridge circuit, different H-bridge circuits can share a half-bridge circuit, so that when the number of DC brushed motors is fixed, the number of required half-bridge circuits can be reduced, thereby reducing the cost of the control circuit. At the same time, the space occupied by the H-bridge circuit can be reduced, and the space occupied by the control circuit can be reduced.

[0026] In the technical solution of this embodiment, by setting at least two ends of the DC brushed motor to share the same half-bridge circuit, different H-bridge circuits can share a half-bridge circuit, so that when the number of DC brushed motors is fixed, the number of required half-bridge circuits can be reduced, thereby reducing the cost of the control circuit. At the same time, the space occupied by the H-bridge circuit can be reduced, and the space occupied by the control circuit can be reduced.

[0027] In some embodiments, Figure 2 is a schematic structural diagram of a control circuit provided by an embodiment of the present invention. As Figure 2 shown, the first end of the DC brushed motor M is connected to a half-bridge circuit 10, and the second end of the DC brushed motor M is connected to another half-bridge circuit 10; at least two first ends or second ends of the DC brushed motor M share a half-bridge circuit 10.

[0028] Specifically, when the control circuit is used to control at least two DC brushed motors M, the half-bridge circuit 10 includes at least two first half-bridge circuits 11 and at least one second half-bridge circuit 12. The first ends of each DC brushed motor M are respectively connected to different first half-bridge circuits 11, and the second ends of at least two DC brushed motors M are connected to the same second half-bridge circuit 12, so that the second half-bridge circuit 12 can simultaneously serve as the half-bridge circuit in the H-bridge circuits corresponding to at least two DC brushed motors M, that is, each second half-bridge circuit 12 can be used to form different H-bridge circuits at the same time, thereby reducing the number of half-bridge circuits required for at least two DC brushed motors M, further reducing the cost of the control circuit and the space occupied by the control circuit.

[0029] During the process of the control circuit controlling the DC brushed motor M to work, the on and off of each first half-bridge circuit 11 and the second half-bridge circuit 12 can be controlled respectively to control the forward and reverse rotation of the DC brushed motor M connected to each first half-bridge circuit 11. Specifically, the first half-bridge circuit 11 can be controlled to provide the first power signal output from the first power supply terminal, and the second half-bridge circuit 12 can be controlled to provide the second power signal output from the second power supply terminal to control the DC brushed motor M to rotate forward. Or, the first half-bridge circuit 11 can be controlled to provide the second power supply output from the second power supply terminal, and the second half-bridge circuit 12 can be controlled to provide the first power supply output from the first power supply terminal to control the DC brushed motor M to rotate in reverse. When the second ends of at least two DC brushed motors M are connected to the same second half-bridge circuit 12, at the same moment, the second half-bridge circuit 12 provides the same power supply for at least two DC brushed motors M. At this time, it can be set that the first half-bridge circuits 11 connected to at least two DC brushed motors M respectively provide the same power supply, so that the rotation directions of at least two DC brushed motors M are the same. In addition, when the second half-bridge circuit 12 provides a power signal to control the rotation of one DC brushed motor M, it can be set that the first half-bridge circuit 11 connected to the other DC brushed motor M is suspended, so that the other DC brushed motor M cannot form a current loop, avoiding affecting the other DC brushed motor M.

[0030] It should be noted that Figure 2Exemplarily, the second ends of three DC brushed motors M share a half-bridge circuit 10. In other embodiments, it may also be provided that the half-bridge circuit 10 includes at least one first half-bridge circuit 11 and at least two second half-bridge circuits 12. The second end of each DC brushed motor M is respectively connected to a different second half-bridge circuit 12, and the first ends of at least two DC brushed motors M are connected to the same first half-bridge circuit 11, so that the first half-bridge circuit 11 can simultaneously serve as the half-bridge circuit in the H-bridge circuits corresponding to at least two DC brushed motors M, that is, each first half-bridge circuit 11 can be used to form different H-bridge circuits at the same time, and the number of half-bridge circuits required for at least two DC brushed motors M can also be reduced, thereby reducing the cost of the control circuit and the space occupied by the control circuit.

[0031] In some embodiments, the half-bridge circuit 10 includes at least two first half-bridge circuits 11 and one second half-bridge circuit 12. The first end of each DC brushed motor M is respectively connected to a different first half-bridge circuit 11, and the second ends of all DC brushed motors M are connected to the second half-bridge circuit 12; wherein, the number of the first half-bridge circuits 11 is equal to the number of the DC brushed motors M.

[0032] Specifically, when the half-bridge circuit 10 includes one second half-bridge circuit 12, the second ends of all DC brushed motors M are connected to the second half-bridge circuit 12, which can enable all DC brushed motors M to share one second half-bridge circuit 12 for forming H-bridge circuits, thereby minimizing the number of half-bridge circuits required for the H-bridge circuits, further reducing the cost of the control circuit and the space occupied by the control circuit.

[0033] Exemplarily, Figure 2 Exemplarily, it is shown that the half-bridge circuit 10 is used for three DC brushed motors M. The half-bridge circuit 10 includes three first half-bridge circuits 11 and one second half-bridge circuit 12. The three DC brushed motors are the first DC brushed motor M1, the second DC brushed motor M2, and the third DC brushed motor M3. The first ends of the first DC brushed motor M1, the second DC brushed motor M2, and the third DC brushed motor M3 are respectively connected to a first half-bridge circuit 11, and the second ends of the first DC brushed motor M1, the second DC brushed motor M2, and the third DC brushed motor M3 are all connected to the second half-bridge circuit 12, so that the second half-bridge circuit 12 can simultaneously serve as the half-bridge circuit in the H-bridge circuits corresponding to the three DC brushed motors M. Compared with the control circuit in the related art, n - 1 half-bridge circuits 10 can be reduced, where n is the number of DC brushed motors M. In Figure 2 In this case, two second half-bridge circuits 12 are reduced, thereby reducing the cost of the control circuit and the space occupied by the control circuit.

[0034] When the control circuit controls the rotation of three DC brushed motors M, at different times, the conduction and cutoff of each first half-bridge circuit 11 and second half-bridge circuit 12 can be controlled respectively to control the forward and reverse rotation of each DC brushed motor M. When the three DC brushed motors M rotate simultaneously, the three first half-bridge circuits 11 can be controlled to output the first power supply simultaneously, and the second half-bridge circuit 12 outputs the second power supply, so that the three DC brushed motors M rotate forward simultaneously. It is also possible to control the three first half-bridge circuits 11 to output the second power supply simultaneously, and the second half-bridge circuit 12 outputs the first power supply, so that the three DC brushed motors M rotate in reverse simultaneously.

[0035] It should be noted that Figure 2 only exemplarily shows that the half-bridge circuit 10 includes one second half-bridge circuit 12. In other embodiments, the half-bridge circuit 10 can also be provided to include at least two second half-bridge circuits 12. By setting some DC brushed motors M to share one second half-bridge circuit 12, the number of half-bridge circuits required for the H-bridge circuit corresponding to the DC brushed motor M can also be reduced, which is not limited here. Exemplarily, on the basis of Figure 2 the half-bridge circuit 10 can also be provided to include two second half-bridge circuits 12. The first ends of the first DC brushed motor M1, the second DC brushed motor M2, and the third DC brushed motor M3 are respectively connected to a first half-bridge circuit 11. The second ends of the first DC brushed motor M1 and the second DC brushed motor M2 are both connected to the same second half-bridge circuit 12, and the second end of the third DC brushed motor M3 is connected to another second half-bridge circuit 12.

[0036] In some embodiments, Figure 3 is a schematic structural diagram of another control circuit provided by an embodiment of the present invention. As shown in Figure 3 the first end of the DC brushed motor M is connected to a half-bridge circuit 10, the second end of the DC brushed motor M is connected to another half-bridge circuit 10, and among at least two DC brushed motors M, the first end of one DC brushed motor M and the second end of another DC brushed motor M share a half-bridge circuit 10.

[0037] Specifically, when the control circuit is used to control at least two DC brushed motors M, at least part of the DC brushed motors M can be set such that the first end of one DC brushed motor M and the second end of another DC brushed motor M share a half-bridge circuit 10, so that the half-bridge circuits 10 corresponding to the two DC brushed motors M can be multiplexed as the half-bridge circuits of two H-bridge circuits. When the first ends of multiple DC brushed motors M all share a half-bridge circuit 10 with the second ends of different DC brushed motors M, the half-bridge circuits 10 corresponding to the multiple DC brushed motors M can all be multiplexed as the half-bridge circuits of two H-bridge circuits, thereby reducing the number of half-bridge circuits required for multiple H-bridge circuits, reducing the cost of the control circuit, and reducing the space occupied by the control circuit.

[0038] During the process of the control circuit controlling the operation of the DC brushed motor M, it is possible to control the half-bridge circuit 10 connected to the first end of the DC brushed motor M to provide a first power supply, and the half-bridge circuit 10 connected to the second end of the DC brushed motor M to provide a second power supply to control the DC brushed motor M to rotate forward. Alternatively, it is possible to control the half-bridge circuit 10 connected to the first end of the DC brushed motor M to provide a second power supply, and the half-bridge circuit 10 connected to the second end of the DC brushed motor M to provide a first power supply to control the DC brushed motor M to rotate in reverse. When the first end of one DC brushed motor M and the second end of another DC brushed motor M share a half-bridge circuit 10, the two DC brushed motors M corresponding to the shared half-bridge circuit 10 can rotate simultaneously in different directions. Exemplarily, the first end of one DC brushed motor M and the second end of another DC brushed motor M share a half-bridge circuit 10. When the half-bridge circuit 10 provides a second power supply, the half-bridge circuit 10 corresponding to the second end of one DC brushed motor M provides a first power supply, and the half-bridge circuit 10 corresponding to the first end of the other DC brushed motor M provides a first power supply, then one DC brushed motor M rotates in reverse and the other DC brushed motor M rotates forward. When the half-bridge circuit 10 provides a first power supply, the half-bridge circuit 10 corresponding to the second end of one DC brushed motor M provides a second power supply, and the half-bridge circuit 10 corresponding to the first end of the other DC brushed motor M provides a second power supply, then one DC brushed motor M rotates forward and the other DC brushed motor M rotates in reverse.

[0039] In some embodiments, the first end of the DC brushed motor M is connected to a half-bridge circuit 10, and the second end of the DC brushed motor M is connected to another half-bridge circuit 10. The first end of each DC brushed motor M shares a half-bridge circuit 10 with the second ends of different DC brushed motors M.

[0040] Specifically, when the first end of each DC brushed motor M shares a half-bridge circuit 10 with the second end of a different DC brushed motor M, one end of each DC brushed motor M shares a half-bridge circuit 10 with one end of a different DC brushed motor M, thereby minimizing the number of half-bridge circuits required for the H-bridge circuit, further reducing the cost of the control circuit, and reducing the space occupied by the control circuit.

[0041] Exemplarily, Figure 3 Exemplarily shown in the figure is that the half-bridge circuit 10 is used for two DC brushed motors M. At this time, the half-bridge circuit 10 includes three in total. The two DC brushed motors M are the first DC brushed motor M1 and the second DC brushed motor M2 respectively. The first end of the first DC brushed motor M1 is connected to a half-bridge circuit 10, the second end of the first DC brushed motor M1 shares a half-bridge circuit 10 with the first end of the second DC brushed motor M2, and the second end of the second DC brushed motor M2 is connected to another half-bridge circuit 10. By setting the second end of the first DC brushed motor M1 to share a half-bridge circuit 10 with the first end of the second DC brushed motor M2, compared with the control circuit in the related art, one half-bridge circuit 10 can be reduced, thereby reducing the cost of the control circuit and reducing the space occupied by the control circuit. At this time, the number of half-bridge circuits 10 is one more than the number of DC brushed motors M.

[0042] When controlling the rotation of two DC brushed motors M, at different times, the conduction or cutoff of the three half-bridge circuits 10 can be controlled respectively to control the forward and reverse rotation of the two DC brushed motors M. When the two DC brushed motors M rotate simultaneously, it is possible to control the half-bridge circuit 10 connected to the first end of the first DC brushed motor M1 to provide a first power supply, the shared half-bridge circuit 10 to provide a second power supply, and the half-bridge circuit 10 connected to the second end of the second DC brushed motor M2 to provide a first power supply, so that the first DC brushed motor M1 rotates forward and the second DC brushed motor M2 rotates in reverse. It is also possible to control the half-bridge circuit 10 connected to the first end of the first DC brushed motor M1 to provide a second power supply, the shared half-bridge circuit 10 to provide a first power supply, and the half-bridge circuit 10 connected to the second end of the second DC brushed motor M2 to provide a second power supply, so that the first DC brushed motor M1 rotates in reverse and the second DC brushed motor M2 rotates forward.

[0043] In some embodiments, the control circuit can also be used to control multiple DC brushed motors. Exemplarily, Figure 4 This is a schematic structural diagram of another control circuit provided by an embodiment of the present invention. As Figure 4As shown, the control circuit includes five half-bridge circuits 10 for controlling four DC brushed motors M. The four DC brushed motors M are respectively the first DC brushed motor M1, the second DC brushed motor M2, the third DC brushed motor M3, and the fourth DC brushed motor M4. The first end of the first DC brushed motor M1 is connected to a half-bridge circuit 10, and the second end of the first DC brushed motor M1 shares a half-bridge circuit 10 with the first end of the second DC brushed motor M2. The second end of the second DC brushed motor M2 shares a half-bridge circuit 10 with the first end of the third DC brushed motor M3. The second end of the third DC brushed motor M3 shares a half-bridge circuit 10 with the first end of the fourth DC brushed motor M4. The second end of the fourth DC brushed motor M4 is connected to a half-bridge circuit 10. By setting one end of each DC brushed motor M to share a half-bridge circuit 10 with the other end of another DC brushed motor M, n - 1 half-bridge circuits 10 can be reduced, where n is the number of DC brushed motors M. Thus, the cost of the control circuit can be reduced, and the space occupied by the control circuit can be decreased.

[0044] When controlling the rotation of four DC brushed motors M, at different times, the conduction and cutoff of each half-bridge circuit 10 can be controlled separately to control the forward and reverse rotation of each DC brushed motor M. When the four DC brushed motors M rotate simultaneously, the rotation directions of the two DC brushed motors M sharing the same half-bridge circuit 10 are opposite. Exemplarily, it can be controlled that the half-bridge circuit 10 connected to the first end of the first DC brushed motor M1 provides the first power supply, the half-bridge circuit 10 shared by the second end of the first DC brushed motor M1 and the first end of the second DC brushed motor M2 provides the second power supply, the half-bridge circuit 10 shared by the second end of the second DC brushed motor M2 and the first end of the third DC brushed motor M3 provides the first power supply, the half-bridge circuit 10 shared by the second end of the third DC brushed motor M3 and the first end of the fourth DC brushed motor M4 provides the second power supply, and the half-bridge circuit 10 connected to the second end of the fourth DC brushed motor M4 provides the first power supply. At this time, the first DC brushed motor M1 rotates forward, the second DC brushed motor M2 rotates in reverse, the third DC brushed motor M3 rotates forward, and the fourth DC brushed motor M4 rotates in reverse. It can also be controlled that the half-bridge circuit 10 connected to the first end of the first DC brushed motor M1 provides the second power supply, the half-bridge circuit 10 shared by the second end of the first DC brushed motor M1 and the first end of the second DC brushed motor M2 provides the first power supply, the half-bridge circuit 10 shared by the second end of the second DC brushed motor M2 and the first end of the third DC brushed motor M3 provides the second power supply, the half-bridge circuit 10 shared by the second end of the third DC brushed motor M3 and the first end of the fourth DC brushed motor M4 provides the first power supply, and the half-bridge circuit 10 connected to the second end of the fourth DC brushed motor M4 provides the second power supply. At this time, the first DC brushed motor M1 rotates in reverse, the second DC brushed motor M2 rotates forward, the third DC brushed motor M3 rotates in reverse, and the fourth DC brushed motor M4 rotates forward.

[0045] It should be noted that Figure 4 only exemplarily shows that one end of each DC brushed motor M shares a half-bridge circuit 10 with the other end of another DC brushed motor M. In other embodiments, it is also possible to set that one end of some DC brushed motors M shares a half-bridge circuit 10 with the other end of another DC brushed motor M. Exemplarily, on the basis of Figure 4 , additional half-bridge circuits 10 can be added, so that the two DC brushed motors M sharing the half-bridge circuit 10 can be respectively connected to different half-bridge circuits 10, thereby reducing the mutual restriction of the rotation directions when different DC brushed motors M rotate simultaneously. For example, in Figure 4On this basis, a half-bridge circuit 10 can be additionally added. The second end of the third DC brushed motor M3 and the first end of the fourth DC brushed motor M4 are respectively connected to different half-bridge circuits 10. When the fourth DC brushed motor M4 rotates simultaneously with other DC brushed motors M, the rotation direction of the fourth DC brushed motor M4 can be prevented from being restricted.

[0046] In some embodiments, Figure 5 is a schematic structural diagram of another control circuit provided by an embodiment of the present invention. As Figure 5 shown, when the control circuit is used to control at least three DC brushed motors M, the first end or the second end of some DC brushed motors M share a half-bridge circuit 10. Among some DC brushed motors M, the first end of one DC brushed motor M can share a half-bridge circuit 10 with the second end of another DC brushed motor M. At this time, the number of half-bridge circuits required for the DC brushed motors M can also be reduced, thereby reducing the cost of the control circuit and the space occupied by the control circuit.

[0047] In some embodiments, when the control circuit is used to control at least three DC brushed motors M, the DC brushed motors M include at least two first DC brushed motors M11 and at least one second DC brushed motor M12, and the half-bridge circuit 10 includes at least two first half-bridge circuits 11 and at least two second half-bridge circuits 12; the first ends of at least two first DC brushed motors M11 are respectively connected to different first half-bridge circuits 11, the second ends of at least two first DC brushed motors M11 are all connected to a second half-bridge circuit 12, the first end of at least one second DC brushed motor M12 is connected to a second half-bridge circuit 12, the second end of at least one second DC brushed motor M12 is connected to another second half-bridge circuit 12, and the first end of each second DC brushed motor M12 shares a second half-bridge circuit 12 with the second end of a different second DC brushed motor M12.

[0048] Specifically, the number of the first half-bridge circuits 11 is the same as the number of the first DC brushed motors M11, and the number of the second half-bridge circuits 12 is one more than the number of the second DC brushed motors M12. The second ends of all the first DC brushed motors M11 share a second half-bridge circuit 12, and the first end of one second DC brushed motor M12 shares a second half-bridge circuit 12 with the second end of the first DC brushed motor M11. The second ends of all the second DC brushed motors M12 share a second half-bridge circuit 12 with the first ends of different second DC brushed motors M12, and n - 1 half-bridge circuits 10 can be reduced, where n is the number of the DC brushed motors M. Thereby, the cost of the control circuit can be reduced, and the space occupied by the control circuit can be reduced.

[0049] Exemplarily, as Figure 5As shown, the control circuit includes three first half-bridge circuits 11 and two second half-bridge circuits 12 for controlling four DC brushed motors M. The four DC brushed motors M include three first DC brushed motors M11 and one second DC brushed motor M12. The first ends of the three first DC brushed motors M11 are respectively connected to a first half-bridge circuit 11, and the second ends of the three first DC brushed motors M11 and the first end of the second DC brushed motor M12 are both connected to the same second half-bridge circuit 12. The second end of the second DC brushed motor M12 is connected to another second half-bridge circuit 12, which can reduce n - 1 half-bridge circuits 10, where n is the number of DC brushed motors M. Thus, the cost of the control circuit can be reduced, and the space occupied by the control circuit can be decreased.

[0050] When controlling the rotation of the four DC brushed motors M, at different moments, the conduction and turn-off of each first half-bridge circuit 11 and each second half-bridge circuit 12 can be respectively controlled to control the forward and reverse rotation of each DC brushed motor M. When the four DC brushed motors M rotate simultaneously, the rotation directions of the three first DC brushed motors M11 are the same, and the rotation direction of the second DC brushed motor M12 is opposite to that of the first DC brushed motor M12.

[0051] Continue to refer to Figures 2 to 5 , the half-bridge circuit 10 includes a first controllable switch tube T1 and a second controllable switch tube T2; the first pole of the first controllable switch tube T1 is connected to the first power supply terminal V1, the second pole of the first controllable switch tube T1 and the first pole of the second controllable switch tube T2 are connected to one end of the DC brushed motor M, the second pole of the second controllable switch tube T2 is connected to the second power supply terminal V2, the control pole of the first controllable switch tube T1 is used to input a first control signal, and the control pole of the second controllable switch tube T2 is used to input a second control signal.

[0052] Specifically, the first control signal can control the conduction or cutoff of the first controllable switch transistor T1. When the first controllable switch transistor T1 is an N-type transistor, the first control signal is at a high level, and the first controllable switch transistor T1 conducts. When the first control signal is at a low level, the first controllable switch transistor T1 cuts off. When the first controllable switch transistor T1 is a P-type transistor, the first control signal is at a low level, and the first controllable switch transistor T1 conducts. When the first control signal is at a high level, the first controllable switch transistor T1 cuts off. Similarly, the second control signal can control the conduction or cutoff of the second controllable switch transistor T2. When the second controllable switch transistor T2 is an N-type transistor, the second control signal is at a high level, and the second controllable switch transistor T2 conducts. When the second control signal is at a low level, the second controllable switch transistor T2 cuts off. When the second controllable switch transistor T2 is a P-type transistor, the second control signal is at a low level, and the second controllable switch transistor T2 conducts. When the second control signal is at a high level, the second controllable switch transistor T2 cuts off. During the operation of the half-bridge circuit 10, the first controllable switch transistor T1 can be controlled to conduct through the first control signal, and the second controllable switch transistor T2 can be controlled to cut off through the second control signal. At this time, the half-bridge circuit 10 outputs the first power supply provided by the first power supply terminal V1. It is also possible to control the first controllable switch transistor T1 to cut off through the first control signal and control the second controllable switch transistor T2 to conduct through the second control signal. At this time, the half-bridge circuit 10 outputs the second power supply provided by the second power supply terminal V2. Among them, the first power supply provided by the first power supply terminal V1 can be the power supply voltage required by the DC brushed motor M, and the second power supply provided by the second power supply terminal V2 can be the ground terminal.

[0053] Reference Figures 2 to 5 , when there are multiple half-bridge circuits 10, the first control signal and the second control signal can both be multiple independent control signals, respectively controlling the first controllable switch transistor T1 and the second controllable switch transistor T2 in different half-bridge circuits 10, so that the power supply signals provided by different half-bridge circuits 10 can be the same or different.

[0054] Based on the above technical solution, the first controllable switch transistor T1 and the second controllable switch transistor T2 conduct alternately.

[0055] Specifically, the first controllable switch transistor T1 and the second controllable switch transistor T2 conduct alternately, so that the half-bridge circuit 10 can output the first power supply or the second power supply, ensuring the power supply reliability of the DC brushed motor M.

[0056] Based on the above technical solutions, the control circuit further includes a printed circuit board, and the half-bridge circuit is disposed on the printed circuit board.

[0057] Specifically, the half-bridge circuit can be disposed on the printed circuit board to form a controller. When the number of half-bridge circuits decreases, the size requirement for the printed circuit board can be reduced, which is beneficial to reducing the size of the printed circuit board and further reducing the size of the controller.

[0058] An embodiment of the present utility model also provides a domain controller. The domain controller includes a control unit and the control circuit provided in any embodiment of the present utility model; the control unit is connected to the control circuit, and the control unit is configured to control the conduction state of the half-bridge circuit in the control circuit.

[0059] Specifically, the control unit can be connected to the half-bridge circuit and is configured to provide a control signal for the half-bridge circuit to control the conduction or cut-off of the switching tubes in the half-bridge circuit, so as to control the half-bridge circuit to output a first power supply or a second power supply, thereby realizing the forward and reverse rotation of a DC brushed motor. Since the domain controller includes the control circuit provided in any embodiment of the present utility model, when the occupied space of the control circuit is reduced, the size of the domain controller can be reduced, which will not be elaborated here.

[0060] An embodiment of the present utility model also provides a vehicle. The vehicle includes the domain controller provided in any embodiment of the present utility model. When the domain controller is applied to the vehicle, the domain controller can be a controller for the power domain, a controller for the cockpit domain, a controller for the chassis domain, a controller for the thermal management domain, a controller for the body domain, etc. Since the vehicle includes the domain controller provided in any embodiment of the present utility model, when the size of the domain controller is reduced, the space occupied by the domain controller in the vehicle can be reduced, thereby improving the flexibility of the vehicle space layout.

[0061] Note that the above is only the preferred embodiment of the present utility model and the applied technical principle. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. A control circuit, characterized in that, For controlling at least two DC brushed motors; the control circuit includes a plurality of half-bridge circuits, one end of each DC brushed motor is connected to a power supply terminal through one of the half-bridge circuits, and one end of at least two of the DC brushed motors shares the same half-bridge circuit; The half-bridge circuit is used to control the conduction or cutoff between one end of the DC brushed motor and the power supply terminal.

2. The control circuit according to claim 1, characterized in that, The first end of the DC brushed motor is connected to one of the half-bridge circuits, and the second end of the DC brushed motor is connected to another half-bridge circuit; the first ends or the second ends of at least two of the DC brushed motors share one of the half-bridge circuits, or, among at least two of the DC brushed motors, the first end of one DC brushed motor and the second end of another DC brushed motor share one of the half-bridge circuits, or, when the control circuit is used to control at least three DC brushed motors, the first ends or the second ends of some of the DC brushed motors share one of the half-bridge circuits, and among some of the DC brushed motors, the first end of one DC brushed motor and the second end of another DC brushed motor share one of the half-bridge circuits.

3. The control circuit according to claim 2, characterized in that, The half-bridge circuit includes at least two first half-bridge circuits and one second half-bridge circuit, the first end of each DC brushed motor is respectively connected to a different one of the first half-bridge circuits, and the second ends of all the DC brushed motors are connected to the second half-bridge circuit; wherein, the number of the first half-bridge circuits is equal to the number of the DC brushed motors.

4. The control circuit according to claim 2, wherein The first end of the DC brushed motor is connected to one of the half-bridge circuits, the second end of the DC brushed motor is connected to another half-bridge circuit, and the first end of each DC brushed motor shares one of the half-bridge circuits with the second end of a different DC brushed motor.

5. The control circuit according to claim 2, wherein When the control circuit is used to control at least three DC brushed motors, the DC brushed motors include at least two first DC brushed motors and at least one second DC brushed motor, and the half-bridge circuit includes at least two first half-bridge circuits and at least two second half-bridge circuits; the first ends of at least two of the first DC brushed motors are respectively connected to different ones of the first half-bridge circuits, the second ends of at least two of the first DC brushed motors are all connected to one of the second half-bridge circuits, the first end of at least one of the second DC brushed motors is connected to one of the second half-bridge circuits, the second end of at least one of the second DC brushed motors is connected to another one of the second half-bridge circuits, and the first end of each second DC brushed motor shares one of the second half-bridge circuits with the second end of a different second DC brushed motor.

6. The control circuit according to any one of claims 1-5, characterized in that, The half-bridge circuit includes a first controllable switch tube and a second controllable switch tube; The first pole of the first controllable switch tube is connected to a first power supply terminal, the second pole of the first controllable switch tube and the first pole of the second controllable switch tube are connected to one end of the DC brushed motor, the second pole of the second controllable switch tube is connected to a second power supply terminal, the control pole of the first controllable switch tube is used to input a first control signal, and the control pole of the second controllable switch tube is used to input a second control signal.

7. The control circuit according to claim 6, wherein The first controllable switch tube and the second controllable switch tube are turned on in a time-sharing manner.

8. The control circuit according to claim 1, wherein It further includes a printed circuit board, and the half-bridge circuit is disposed on the printed circuit board.

9. A domain controller, characterized in that, It includes a control unit and the control circuit according to any one of claims 1-8; the control unit is connected to the control circuit, and the control unit is configured to control the conduction state of the half-bridge circuit in the control circuit.

10. A complete vehicle, characterized in that, It includes the domain controller according to claim 9.

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