Motor control circuit and dual-power switching circuit

Abstract

The utility model provides a motor control circuit and a dual-power switching circuit, the motor control circuit comprises a first relay and a second relay, and a second end of an electromagnetic coil of the second relay is connected with a ground end through a normally closed switch of the first relay; therefore, under the condition that the first power supply device supplies power to the electromagnetic coil of the first relay, the normally-closed switch of the first relay is switched off; if the first power supply device is abnormal, the electromagnetic coil of the second relay is powered, the normally closed switch of the first relay is switched off, the electromagnetic coil of the second relay cannot be powered on, and a second voltage signal sent by the second power supply device cannot be transmitted to the first control module of the motor through the normally open switch of the second relay. Therefore, the function of preventing the first control module from being interfered to cause abnormal operation of the motor can be realized without adding any circuit between the first relay and the second relay in the motor control circuit, so that the cost of the motor control circuit is saved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a motor control circuit and a dual power conversion circuit. Background Art

[0002] Emergency power supply systems require a dual-power automatic transfer switch. This switch supports both primary and backup power sources to power the load. Specifically, when the primary power source is intact, the switch switches to the primary power source, which then supplies power to the load via the switch. If the primary power source fails, the switch automatically switches to the backup power source, allowing the backup power source to continue supplying power to the load through the switch, ensuring continuous and reliable operation.

[0003] In order to ensure the normal operation of the load, the dual power automatic conversion circuit needs to be designed to ensure that the load is not connected to the main power supply and the backup power supply at the same time; in related technologies, this can be achieved through the structure of the motor and the transmission device. The motor is connected to the transmission device, and the motor and the transmission device interact with each other so that one power supply between the main power supply and the backup power supply supplies power to the load.

[0004] In the related art, the rotation state of the motor can be controlled by a motor control circuit to realize that a power supply between the main power supply and the backup power supply can supply power to the load. However, the structure of the motor control circuit in the related art is relatively complex and the cost is high. Utility Model Content

[0005] The present application provides a motor control circuit and a dual power conversion circuit. The second end of the electromagnetic coil of the second relay in the motor control circuit is connected through the normally closed switch of the first relay. No circuit needs to be added between the first relay and the second relay to achieve the function of preventing the first control module of the motor from being interfered with by abnormal conditions and causing abnormal operation of the motor, thereby saving the cost of the motor control circuit while ensuring the normal operation of the motor.

[0006] In the first aspect, the present application provides a motor control circuit, comprising: a first relay and a second relay; wherein the first end of the electromagnetic coil of the first relay and the first end of the electromagnetic coil of the second relay are respectively connected to the first power supply device; the second end of the electromagnetic coil of the first relay is connected to the ground; the second end of the electromagnetic coil of the second relay is connected to the ground through the normally closed switch of the first relay; the second power supply device is connected to the first end of the first control module through the normally open switch of the first relay; the second power supply device is also connected to the second end of the first control module through the normally open switch of the second relay; when the first power supply device supplies power to the electromagnetic coil of the first relay, the normally closed switch of the first relay is disconnected, the normally open switch of the first relay is closed, and the second power supply device is turned on a first voltage signal is sent to the first end of the first control module through the normally-open switch of the first relay; in the case where the first power supply device supplies power to the electromagnetic coil of the first relay, if the first power supply device supplies power to the electromagnetic coil of the second relay, the normally-closed switch of the first relay is disconnected, the electromagnetic coil of the second relay cannot be energized, so that the normally-open switch of the second relay remains disconnected, and the second power supply device cannot send the second voltage signal to the second end of the first control module through the normally-open switch of the second relay; wherein, when the first end of the first control module receives the first voltage signal, the first control module controls the motor to rotate in the first direction; when the second end of the first control module receives the second voltage signal, the first control module controls the motor to rotate in the second direction.

[0007] In some embodiments, the second end of the electromagnetic coil of the first relay is connected to the ground end through the normally closed switch of the second relay; when the first power supply device supplies power to the electromagnetic coil of the second relay, the normally closed switch of the second relay is disconnected, the normally open switch of the second relay is closed, and the second power supply device sends the second voltage signal to the second end of the first control module through the normally open switch of the second relay; when the first power supply device supplies power to the electromagnetic coil of the second relay, if the first power supply device supplies power to the electromagnetic coil of the first relay, based on the disconnection of the normally closed switch of the second relay, the electromagnetic coil of the first relay cannot be energized, so that the normally open switch of the first relay remains disconnected, and the second power supply device cannot send the first voltage signal to the first end of the first control module through the normally open switch of the first relay.

[0008] In some embodiments, the motor control circuit also includes the first power supply device; the first power supply device is also used to control the electromagnetic coil of the first relay and the electromagnetic coil of the second relay to be in different power supply states, so that the normally closed switches of the first relay and the second relay are in different working states, and the normally open switches of the first relay and the second relay are in different working states, so that the second power supply device sends the first voltage signal to the first end of the first control module through the normally open switch of the first relay, or, the second power supply device sends the second voltage signal to the second end of the first control module through the normally open switch of the second relay.

[0009] In some embodiments, the first power supply device includes a power supply module and a first switch module; the power supply module is connected to the first end of the electromagnetic coil of the first relay and the first end of the electromagnetic coil of the second relay respectively through the first switch module; the first switch module is used to provide a first transmission path between the power supply module and the first end of the electromagnetic coil of the first relay, and a second transmission path between the power supply module and the first end of the electromagnetic coil of the second relay; the first switch module is used to control one of the first transmission path and the second transmission path to be conductive based on the abnormal status of the main power supply and the backup power supply, thereby controlling the electromagnetic coil of the first relay and the electromagnetic coil of the second relay to be in different power supply states.

[0010] In some embodiments, the motor control circuit also includes a second control module, and the first switch module is connected to the main power supply and the backup power supply respectively through the second control module; the second control module is used to perform abnormality detection on the main power supply and the backup power supply, and when an abnormality is detected in the main power supply or the backup power supply, a control instruction is sent to the first switch module to control the first transmission path or the second transmission path to be conductive.

[0011] In some embodiments, when the second control module detects an abnormality in the main power supply, it sends a first control instruction to the first switch module; wherein the first control instruction is used to control the conduction of the first transmission path; when the second control module detects an abnormality in the backup power supply or receives a switching instruction, it sends a second control instruction to the first switch module; wherein the second control instruction is used to control the conduction of the second transmission path.

[0012] In some embodiments, the supply voltage of the first power supply device is less than the supply voltage of the second power supply device.

[0013] In a second aspect, the present application provides a dual power conversion circuit, comprising the motor control circuit, the first control module and the motor described in the first aspect.

[0014] In some embodiments, the dual power conversion circuit further includes a transmission device, wherein the load is connected to the main power supply and the backup power supply respectively through the transmission device; the transmission device is used to provide a first power supply path between the main power supply and the load, and a second power supply path between the backup power supply and the load.

[0015] In some embodiments, when the first end of the first control module receives a first voltage signal sent by the second power supply device, the transmission device causes the first power supply path to be in an off state and the second power supply path to be in an on state under the action of the motor rotating in the first direction, thereby enabling the backup power supply to supply power to the load; when the second end of the first control module receives a second voltage signal sent by the second power supply device and controls the motor to rotate in the second direction, the transmission device causes the second power supply path to be in an off state and the first power supply path to be in an on state under the action of the motor rotating in the second direction, thereby enabling the main power supply to supply power to the load.

[0016] In a third aspect, the present application provides an electronic device, which includes the dual power conversion circuit described in the second aspect.

[0017] The present application provides a motor control circuit and a dual power conversion circuit, wherein the motor control circuit includes a first relay and a second relay, wherein the second end of the electromagnetic coil of the second relay is connected to the ground terminal via the normally closed switch of the first relay; thus, when the first power supply device supplies power to the electromagnetic coil of the first relay, the normally closed switch of the first relay is disconnected; if an abnormality occurs in the first power supply device and the electromagnetic coil of the second relay is also supplied with power, since the normally closed switch of the first relay is disconnected, the electromagnetic coil of the second relay cannot be powered, and the first voltage signal sent by the second power supply device cannot be transmitted to the first control module of the motor via the normally open switch of the second relay. In this way, the function of preventing the first control module of the motor from being interfered with by abnormal conditions and causing abnormal operation of the motor can be realized without adding any circuit between the first relay and the second relay in the motor control circuit, thereby saving the cost of the motor control circuit while ensuring the normal operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an existing dual power conversion circuit;

[0019] Figure 2 A schematic diagram of the structure of a motor control circuit provided in an embodiment of the present application;

[0020] Figure 3A A schematic diagram of relay contacts provided in an embodiment of the present application;

[0021] Figure 3B A schematic diagram of relay contacts provided in an embodiment of the present application;

[0022] Figure 3C A schematic diagram of relay contacts provided in an embodiment of the present application;

[0023] Figure 3D A schematic diagram of relay contacts provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a motor control circuit provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of a motor control circuit provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the structure of a dual power conversion circuit provided in an embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of the structure of the dual power conversion circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a alone, b alone, or c alone can represent: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0029] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present application.

[0030] The terms "connected" and "connect" should be interpreted broadly. For example, "connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is interconnected. It can also refer to internal connectivity between two components. Signal connection can refer not only to signal connection through circuits but also to signal connection through media, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application on a case-by-case basis.

[0031] Figure 1 FIG. 1 is a schematic diagram of a dual power conversion circuit in the related art; FIG. Figure 1 As shown, the dual power conversion circuit in the related art includes a motor control circuit 11 , a motor 12 and a transmission device 13 .

[0032] The motor control circuit 11 is connected to the motor 12 , the motor 12 is connected to the transmission device 13 , the main power supply is connected to the load through the transmission device 13 , and the backup power supply is connected to the load through the transmission device 13 .

[0033] In the dual power conversion circuit, the motor control circuit 11 can control the rotation state of the motor 12 (clockwise rotation or counterclockwise rotation), so that the transmission device 13 is in different working states to enable one of the main power supply and the backup power supply to power the load.

[0034] The motor control circuit 11 generally includes two relays; the clockwise and counterclockwise rotations of the motor can be achieved by controlling the opening and closing of the two relays; for example, the motor rotates clockwise when one relay is closed, and the motor rotates counterclockwise when the other relay is closed.

[0035] In the prior art, some circuit modules need to be installed between the two relays to prevent the two relays from opening and closing at the same time, so as to ensure reliable and stable operation of the motor. However, the cost of such motor control circuit is relatively high.

[0036] Based on this, the present application provides a motor control circuit, including a first relay and a second relay, the second end of the electromagnetic coil of the second relay is connected to the ground end through the normally closed switch of the first relay, and no other circuit modules are arranged between the first relay and the second relay; in this way, when the first power supply device supplies power to the electromagnetic coil of the first relay, the normally closed switch of the first relay is disconnected; if an abnormality occurs in the first power supply device, it also supplies power to the electromagnetic coil of the second relay. Since the normally closed switch of the first relay is disconnected, the electromagnetic coil of the second relay cannot be powered, and the first voltage signal sent by the second power supply device cannot be transmitted to the first control module through the normally open switch of the second relay. In this way, no devices need to be added between the first relay and the second relay to prevent the first control module from being interfered with by abnormal conditions, thereby saving the cost of the motor control circuit.

[0037] Based on this, the present application provides a motor control circuit, in which the second end of the electromagnetic coil of the second relay in the motor control circuit is connected through the normally closed switch of the first relay. No circuit needs to be added between the first relay and the second relay to achieve the function of preventing the first control module of the motor from being interfered with by abnormal conditions and causing abnormal operation of the motor, thereby saving the cost of the motor control circuit while ensuring the normal operation of the motor.

[0038] Next, through Figure 2 The embodiment illustrates the specific structure of the motor control circuit 20 of the present application.

[0039] like Figure 2 As shown, the motor control circuit 20 provided in the present application includes a first relay K1 and a second relay K2.

[0040] The first relay K1 includes an electromagnetic coil L1 , a normally closed switch S1 , and a normally open switch S2 .

[0041] The second relay K2 includes an electromagnetic coil L2, a normally closed switch S3, and a normally open switch S4.

[0042] The first relay and the second relay are both electromagnetic relays. The normally closed switch of the first relay, the normally open switch of the first relay, the normally closed switch of the second relay, and the normally open switch of the second relay are respectively composed of two corresponding contacts. When the electromagnetic relay is energized, a magnetic field is generated, causing the corresponding contacts to be attracted or opened, thereby realizing the closing and opening of the corresponding switches.

[0043] The present application does not limit the types of the first relay and the second relay. The types of relays can be distinguished according to the types of contacts included in the relays.

[0044] Next, Figures 3A to 3D The types supported by the relay (first relay or second relay) of this application are described as an example.

[0045] Figures 3A to 3D Schematic diagram of the contacts of the relay provided in this application.

[0046] like Figure 3A As shown, the relay of the present application may be a relay having a set of normally open contacts and a set of normally closed contacts, wherein the normally open contacts and the normally closed contacts are different.

[0047] Figure 3A In the circuit, contacts 2 and 5 are normally closed contacts, and contacts 3 and 6 are normally open contacts; contacts 2 and 5 form a normally closed switch S1 or S3, and contacts 3 and 6 form a normally open switch S2 or S4.

[0048] like Figure 3B As shown, the relay of the present application can be a relay with multiple groups of normally open contacts and multiple groups of normally closed contacts ( Figure 3B Take two sets of normally open contacts and two sets of normally closed contacts as an example).

[0049] Figure 3B In the circuit, the two groups of normally open contacts and the two groups of normally closed contacts are different.

[0050] Figure 3B In the figure, contact 8 and contact 7 are a group of normally open contacts, constituting a normally open switch 1, and contact 9 and contact 6 are a group of normally closed contacts, constituting a normally closed switch 1.

[0051] Contacts 10 and 5 form a pair of normally open contacts, forming a normally open switch 2. Contacts 11 and 4 form a pair of normally closed contacts, forming a normally closed switch 2. Any pair of normally closed contacts can form a normally closed switch S1 or S3, and any pair of normally open contacts can form a normally open switch S2 or S4.

[0052] In this case, any normally open switch, such as the normally open switch 1, can be used as S2 or S4 in this application. Any normally closed switch, such as the normally closed switch 2, can be used as S1 or S3 in this application.

[0053] like Figure 3C As shown, the relay of the present application may be a relay having multiple groups of normally open contacts and one group of normally closed contacts. ( Figure 3C Take four groups of normally open contacts and one group of normally closed contacts as an example)

[0054] Figure 3C In the figure, contact 6 and contact 5 are a group of normally open contacts, constituting normally open switch 1; contact 7 and contact 4 are a group of normally open contacts, constituting normally open switch 2; contact 8 and contact 3 are a group of normally open contacts, constituting normally open switch 3; contact 9 and contact 2 are a group of normally open contacts, constituting normally open switch 4; contact 10 and contact 12 are a group of normally closed contacts, constituting normally closed switch 1.

[0055] In this case, any one of the normally open switches 1 to 4 can be used as S2 or S4, and the normally closed switch 1 can be used as S1 or S3.

[0056] Figure 3D In the diagram, contact 3 is the movable contact; contact 3 and contact 4 form a pair of normally open contacts, forming normally open switch 1. Contact 3 and contact 2 form a pair of normally closed contacts, forming normally closed switch 2. Contact 6 is the movable contact; contact 6 and contact 5 form a pair of normally open switches, forming normally open switch 3, and contact 6 and contact 7 form a pair of normally closed contacts, forming normally closed switch 4.

[0057] There is a switching relationship between the normally open switch 1 and the normally closed switch 2. When the contact 3 contacts the contact 2, the normally closed switch 2 is closed and the normally open switch 1 is opened.

[0058] There is a switching relationship between the normally open switch 3 and the normally closed switch 4. When the contact 6 contacts the contact 7, the normally closed switch 4 is closed and the normally open switch 3 is opened.

[0059] In this case, the normally open switch 1 can be used as S2 or S4, and the normally closed switch 2 can be used as S1 or S3. Alternatively, the normally open switch 3 can be used as S2 or S4, and the normally closed switch 4 can be used as S1 or S3.

[0060] In the first relay, when L1 is not energized, S1 is closed and S2 is open. In the second relay, when L2 is not energized, S3 is closed and S4 is open. Therefore, S1 and S3 are called normally closed switches, and S2 and S4 are called normally open switches.

[0061] When L1 is energized, S1 is in the disconnected state and S2 is in the closed state; when L2 is energized, S3 is in the disconnected state and S4 is in the closed state.

[0062] The first ends of L1 and L2 are respectively connected to the first power supply device 21, and the first power supply device 21 supplies power to L1 and L2. The second end of L1 is connected to the ground terminal. The second end of L2 is connected to the ground terminal through S1.

[0063] Under normal circumstances, the first power supply device 21 does not supply power to L1 and L2 at the same time. The first power supply device 21 selects to supply power to one of L1 and L2 and not to the other. That is, the first power supply device 21 can control L1 and L2 to be in different power supply states.

[0064] As mentioned above, when L1 and L2 are not energized, S1 and S3 operate in the same state, both closed; S2 and S4 operate in the same state, both open. When L1 and L2 are energized, S1 and S3 operate in the same state, and S2 and S4 operate in the same state.

[0065] If L1 and L2 are in different power supply states, the working states of S1 and S3 are different, and the working states of S2 and S4 are different; only one switch of S2 and S4 is in the closed state.

[0066] Next, the functions of S2 and S4 are described in detail.

[0067] The second power supply device 22 is connected to a first end of the first control module 23 via S2 , and the second power supply device 22 is connected to a second end of the first control module 23 via S4 .

[0068] The first control module 23 controls the forward and reverse rotation of the motor 24. The first control module 23 includes two receiving ports: a first port and a second port. If the first port of the first control module 23 receives a first voltage signal, the first control module 23 controls the motor 24 to rotate in a first direction. If the second port of the first control module 23 receives a second voltage signal, the first control module 23 controls the motor 24 to rotate in a second direction.

[0069] The first direction is opposite to the second direction; illustratively, the first direction is clockwise and the second direction is counterclockwise.

[0070] As described above, the first power supply device 21 selects to power the first relay K1. Under normal circumstances, the first power supply device 21 does not power the second relay K2. S2 and S4 are in different operating states. Therefore, the second power supply device 22 can only send the first voltage signal to the first terminal of the first control module 23 to control the motor 24 to rotate in the first direction. However, under abnormal circumstances, the first power supply device 21 may receive an erroneous instruction and also power the second relay.

[0071] In the present application, the supply voltage of the first power supply device 21 is less than the supply voltage (i.e., the voltage corresponding to the first voltage signal or the second voltage signal) of the second power supply device 22. For example, the supply voltage of the first power supply device 21 is DC 5V or 12V, and the supply voltage of the second power supply device 22 is AC 220V.

[0072] Combine Figure 2 Before the abnormal situation occurs (first power supply device 21 supplies power to the second relay), first power supply device 21 supplies power to the first relay, and S1 is disconnected. After the abnormal situation occurs, although first power supply device 21 supplies power to the second relay, the disconnection of S1 disconnects the path from first power supply device 21, L2, and S1 to ground, and L2 of the second relay cannot receive power. S3 of the second relay remains closed, and S4 remains disconnected. Consequently, the second power supply device 22 cannot transmit the second voltage signal to the second terminal of the first control module 23 via S4 of the second relay.

[0073] It can be understood that if the first relay and the second relay are completely independent (that is, there is no connection between the second end of L1 and S3, the second end of L1 is directly grounded, and there is no connection between the second end of L2 and S1, and the second end of L2 is directly grounded), when the first power supply device 21 supplies power to the first relay, the second power supply device 22 sends a first voltage signal to the first end of the first control module 23. If an abnormal situation occurs, the first power supply device 21 also supplies power to the second relay, and the first power supply device 21, L2 and the ground end form a transmission loop, then L2 can be energized, S3 is disconnected, S4 is closed, and the second voltage signal sent by the second power supply device 22 is transmitted to the second end of the first control module 23 through S4.

[0074] In this way, when the first end of the first control module 23 receives the first voltage signal, the second end of the first control module 23 receives the second voltage signal, which will interfere with the first control module 23, causing abnormal rotation of the motor 24, and making the power supply status of the main power supply and the backup power supply to the load abnormal.

[0075] In the present application, the second end of L2 is grounded through S1. When the first power supply device 21 supplies power to L1, L1 is powered, and the second power supply device 22 can send a first voltage signal to the first end of the first control module 23. When an abnormal situation occurs, since S1 is disconnected, although the first power supply device 21 can supply power to L2, L2 cannot be powered. In this way, it is ensured that the second end of the first control module 23 cannot receive the second voltage signal under abnormal circumstances, thereby avoiding the interference of abnormal circumstances on the rotation of the motor 24. On this basis, the present application does not add additional devices between the first relay and the second relay. Figure 2 The interlocking structure of the first relay and the second relay can realize the above functions and save the cost of the motor control circuit 20.

[0076] In some embodiments, an abnormal situation may also occur when the first power supply device 21 receives an erroneous signal while powering L2 of the second relay. To address this situation, the present application provides a motor control circuit 20 to address the interference with the rotation of the motor 24 caused by the abnormal situation.

[0077] Figure 4 This is a schematic diagram of the structure of the motor control circuit 20 provided in the embodiment of the present application. Figure 4 As shown, the second end of the electromagnetic coil of the first relay is connected to the ground through the normally closed switch of the second relay.

[0078] Before an abnormality occurs, the first power supply device 21 supplies power to the electromagnetic coil of the second relay and not to the electromagnetic coil of the first electromagnetic relay. Consequently, L2 is energized and S3 is disconnected. When an abnormality occurs, the first power supply device 21 also supplies power to the electromagnetic coil of the first relay. Since S3 is disconnected, L1 is disconnected, and S2 remains disconnected. Consequently, the first voltage signal sent by the second power supply device 22 to S2 cannot reach the first terminal of the first control module 23. This prevents the abnormality from interfering with the first control module 23 and, consequently, the rotation of the motor 24.

[0079] In some embodiments, the motor control circuit 20 also includes a first power supply device 21. As described above, the first power supply device 21 is used to control the electromagnetic coil of the first relay and the electromagnetic coil of the second relay to be in different power supply states, so that the normally closed switches of the first relay and the second relay are in different working states, and the normally open switches of the first relay and the second relay are in different working states, so that the second power supply device 22 sends the first voltage signal to the first end of the first control module 23 through the normally open switch of the first relay, or so that the second power supply device 22 sends the second voltage signal to the second end of the first control module 23 through the normally open switch of the second relay.

[0080] Next, through Figure 5 The structure of the first power supply device 21 and how the first power supply device 21 implements the above functions are described.

[0081] Figure 5 This is a schematic diagram of the structure of the motor control circuit 20 provided in the embodiment of the present application. Figure 5 As shown, the first power supply device 21 includes a power supply module 212 and a first switch module 211 .

[0082] The power supply module 212 is connected to the first end of the electromagnetic coil L1 of the first relay and the first end of the electromagnetic coil L2 of the second relay respectively through the first switch module 211 .

[0083] Specifically, the power supply module 212 is connected to the first switch module 211 , and the first switch module 211 is connected to the first end of L1 and the first end of L2 respectively.

[0084] The first switch module 211 is used to provide a first transmission path between the power supply module 212 and the first end of L1 , and a second transmission path between the power supply module 212 and the first end of L2 .

[0085] The first switch module 211 can select any one of the first transmission path and the second transmission path to be turned on and the other transmission path to be turned off according to the abnormal status of the main power supply and the backup power supply, so that the first power supply device 21 can power one of the electromagnetic coils of the first relay and the electromagnetic coils of the second relay.

[0086] The connection and disconnection of the first transmission path and the second transmission path can be realized based on the second control module 25 .

[0087] In some embodiments, such as Figure 6 As shown, the motor control circuit 20 further includes a second control module 25. The first switch module 211 is further configured to connect to the second control module 25. The second control module 25 is connected to the main power supply and the backup power supply, respectively.

[0088] In some embodiments, the power supply module 212 is further connected to the main power supply and the backup power supply. The power supply module 212 is configured to convert the 220V AC power provided by the main power supply or the backup power supply into two lower DC voltages, such as 12V DC and 5V DC, through a transformer, and then stabilize the voltage. The 12V DC voltage signal output by the power supply module is used to power the electromagnetic coils of the first and second relays.

[0089] In some embodiments, the power supply module 212 is further connected to the second control module 25 , and outputs a 5V voltage signal for supplying power to the second control module 25 .

[0090] In other embodiments, the power supply module 212 may also be a power supply independent of the main power supply or the backup power supply, and may be capable of providing 12V and 5V voltages. This application does not limit this.

[0091] Similar to the first power supply device 21, the second power supply device 22 can be a main power supply or a backup power supply, which can provide a 220V voltage signal. Alternatively, the second power supply device 22 can be a power supply other than the main power supply or the backup power supply. This application does not limit this.

[0092] The second control module 25 is used to detect abnormalities of the main power supply and the backup power supply, and send a control instruction to the first switch module 211 based on the abnormal status of the main power supply and the backup power supply to control one of the first transmission path and the second transmission path to be conductive.

[0093] The main power supply and the backup power supply can both be used to power the load. Specifically, when the main power supply is powering the load, if the second control module 25 detects that the main power supply is abnormal, it sends a first control instruction to the first switch module 211.

[0094] The first control instruction is used to control the conduction of the first transmission path, so that the first power supply device 21 supplies power to the electromagnetic coil of the first relay, thereby causing the motor 24 to rotate in the first direction. The rotation of the motor 24 in the first direction can disconnect the power supply path between the main power supply and the load, and connect the power supply path between the backup power supply and the load, thereby enabling the backup power supply to supply power to the load.

[0095] When the backup power supply is supplying power to the load, if the second control module 25 detects that an abnormality has occurred in the backup power supply, or if the main power supply completes the abnormality repair, the second control module 25 receives a switching instruction, and the second control module 25 sends a second control instruction to the first switch module 211.

[0096] The second control instruction is used to control the conduction of the second transmission path, so that the first power supply device 21 supplies power to the electromagnetic coil of the second relay, thereby causing the motor 24 to rotate in the second direction. The rotation of the motor 24 in the second direction can disconnect the power supply path between the backup power supply and the load, and connect the power supply path between the main power supply and the load, thereby enabling the main power supply to supply power to the load.

[0097] As mentioned above, the motor control circuit 20 controls the motor 24 to rotate in different directions in order to enable one of the main power supply and the backup power supply to supply power to the load; it is used in the scenario where the power supply of the load is switched from the main power supply to the backup power supply when the main power supply is abnormal, or when the backup power supply to the load is abnormal, or after the main power supply abnormality is repaired, the power supply of the load is switched from the backup power supply to the main power supply. Figure 6 As shown, the motor control circuit 20 , the first control module 23 , and the motor 24 of the present application can constitute a dual power switching circuit 60 .

[0098] exist Figure 6 On the basis of Figure 7 As shown, the dual power switching circuit 60 further includes a transmission device 26 , and the main power supply and the backup power supply are connected to the load through the transmission device 26 respectively.

[0099] The load may be various electrical equipment.

[0100] The transmission device 26 is used to provide a first power supply path between the main power supply and the load, and a second power supply path between the backup power supply and the load.

[0101] The transmission device 26 is also connected to the motor 24. When the first terminal of the first control module 23 receives a first voltage signal, the first control module 23 controls the motor 24 to rotate in a first direction. The rotation of the motor 24 in the first direction drives the transmission device to rotate accordingly, thereby disconnecting the first power supply path and connecting the second power supply path. This allows the backup power supply to supply power to the load via the second power supply path.

[0102] When the second end of the first control module 23 receives the second voltage signal, the first control module 23 controls the motor 24 to rotate in the second direction. The rotation of the motor 24 in the second direction drives the transmission device to rotate accordingly, so that the second power supply path is in the disconnected state and the first power supply path is in the on state, and the main power supply can supply power to the load through the first power supply path.

[0103] In this embodiment, the motor control circuit 20, the transmission device 26 and the second control module 25 in the dual power switching circuit work together. In the event of an abnormality in the main power supply, the dual power switching circuit automatically switches the load circuit to the backup power supply. When the abnormality in the main power supply is repaired or the backup power supply is abnormal, the dual power switching circuit can also automatically switch the load circuit to the main power supply, thereby ensuring that the load has continuous and uninterrupted power supply to improve the user experience.

[0104] The present application also provides an electronic device, including a dual power switching circuit 60 .

[0105] The features disclosed in several embodiments provided in this application can be arbitrarily combined to obtain new embodiments without conflict.

[0106] The above is merely an embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A motor control circuit, characterized in that: include: A first relay and a second relay; wherein, The first end of the electromagnetic coil of the first relay and the first end of the electromagnetic coil of the second relay are respectively connected to the first power supply device; The second end of the electromagnetic coil of the first relay is connected to the ground; the second end of the electromagnetic coil of the second relay is connected to the ground through the normally closed switch of the first relay; The second power supply device is connected to the first end of the first control module through the normally open switch of the first relay; the second power supply device is also connected to the second end of the first control module through the normally open switch of the second relay; When the first power supply device supplies power to the electromagnetic coil of the first relay, the normally closed switch of the first relay is opened, the normally open switch of the first relay is closed, and the second power supply device sends a first voltage signal to the first end of the first control module through the normally open switch of the first relay; In the case where the first power supply device supplies power to the electromagnetic coil of the first relay, if the first power supply device supplies power to the electromagnetic coil of the second relay, the electromagnetic coil of the second relay cannot be energized due to the normally closed switch of the first relay being disconnected, so that the normally open switch of the second relay remains disconnected, and the second power supply device cannot send the second voltage signal to the second end of the first control module through the normally open switch of the second relay; When the first end of the first control module receives the first voltage signal, the first control module controls the motor to rotate in a first direction; when the second end of the first control module receives the second voltage signal, the first control module controls the motor to rotate in a second direction.

2. The motor control circuit according to claim 1, wherein: The second end of the electromagnetic coil of the first relay is connected to the ground terminal through the normally closed switch of the second relay; When the first power supply device supplies power to the electromagnetic coil of the second relay, the normally closed switch of the second relay is opened, the normally open switch of the second relay is closed, and the second power supply device sends the second voltage signal to the second end of the first control module through the normally open switch of the second relay; In the case where the first power supply device supplies power to the electromagnetic coil of the second relay, if the first power supply device supplies power to the electromagnetic coil of the first relay, the normally closed switch of the second relay is disconnected, and the electromagnetic coil of the first relay cannot be energized, so that the normally open switch of the first relay remains disconnected, and the second power supply device cannot send the first voltage signal to the first end of the first control module through the normally open switch of the first relay.

3. The motor control circuit according to claim 1, wherein: The motor control circuit further includes the first power supply device; The first power supply device is also used to control the electromagnetic coil of the first relay and the electromagnetic coil of the second relay to be in different power supply states, so that the normally closed switches of the first relay and the second relay are in different working states, and the normally open switches of the first relay and the second relay are in different working states, so that the second power supply device sends the first voltage signal to the first end of the first control module through the normally open switch of the first relay, or sends the second voltage signal to the second end of the first control module through the normally open switch of the second relay.

4. The motor control circuit according to claim 3, characterized in that: The first power supply device includes a power supply module and a first switch module; The power supply module is connected to the first end of the electromagnetic coil of the first relay and the first end of the electromagnetic coil of the second relay respectively through the first switch module; the first switch module is used to provide a first transmission path between the power supply module and the first end of the electromagnetic coil of the first relay, and a second transmission path between the power supply module and the first end of the electromagnetic coil of the second relay; The first switch module is used to control one of the first transmission path and the second transmission path to be turned on based on the abnormal status of the main power supply and the backup power supply, thereby controlling the electromagnetic coil of the first relay and the electromagnetic coil of the second relay to be in different power supply states.

5. The motor control circuit according to claim 4, characterized in that: Also includes a second control module, The first switch module is connected to the main power supply and the backup power supply respectively through the second control module; The second control module is used to detect abnormalities in the main power supply and the backup power supply. When an abnormality is detected in the main power supply or the backup power supply, the second control module sends a control instruction to the first switch module to control the first transmission path or the second transmission path to be turned on.

6. The motor control circuit according to claim 5, characterized in that: The second control module sends a first control instruction to the first switch module when detecting an abnormality in the main power supply; wherein the first control instruction is used to control the conduction of the first transmission path; When the second control module detects an abnormality in the backup power supply or receives a switching instruction, it sends a second control instruction to the first switch module; wherein the second control instruction is used to control the conduction of the second transmission path.

7. The motor control circuit according to claim 1, wherein: The supply voltage of the first power supply device is lower than the supply voltage of the second power supply device.

8. A dual power conversion circuit, characterized in that: The motor control circuit comprises the motor control circuit according to any one of claims 1 to 7, a first control module and a motor.

9. The dual power conversion circuit according to claim 8, characterized in that: Also included is a transmission device, wherein The load is connected to the main power supply and the backup power supply respectively through the transmission device; the transmission device is used to provide a first power supply path between the main power supply and the load, and a second power supply path between the backup power supply and the load.

10. The dual power conversion circuit according to claim 9, wherein: When the first end of the first control module receives the first voltage signal sent by the second power supply device, the transmission device causes the first power supply path to be disconnected and the second power supply path to be connected under the action of the motor rotating in the first direction, so that the backup power supply supplies power to the load; When the second end of the first control module receives the second voltage signal sent by the second power supply device and controls the motor to rotate in the second direction, the transmission device causes the second power supply path to be in an off state and the first power supply path to be in an on state under the action of the motor rotating in the second direction, so that the main power supply supplies power to the load.

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