Dual-power switching circuit for generator

Abstract

The utility model discloses a dual power supply switching circuit for a generator, comprising a commercial power switching module, a generator switching module and a control module, the control module is respectively connected with the commercial power switching module and the generator switching module, and the control module controls the commercial power switching module and the generator switching module through enabling. The load switches corresponding to the commercial power switching module and the generator switching module are actuated to supply power to the load, and the on-off states of the load switches corresponding to the commercial power switching module and the generator switching module are opposite to the on-off states of the load switches corresponding to the commercial power switching module and the generator switching module. According to the utility model, the commercial power switching module and the generator switching module are enabled to be controlled, so that the load switches corresponding to the commercial power switching module and the generator switching module are enabled to be closed to supply power to the load; and meanwhile, the low-temperature control effect of saving energy and reducing consumption is achieved by matching with the magnetic latching relay with bidirectional conduction.

Description

Technical Field

[0001] The utility model relates to the technical field of generator power supply, and more specifically, to a dual power supply switching circuit for a generator. Background Art

[0002] Currently, the generator ATS on the market generally adopts control circuits with mechanical interlocking or non-interlocking circuits, which have poor reliability. In addition, due to the use of the above circuits, the control coils have high power consumption and severe heat generation, and are more likely to fail in extreme environments.

[0003] Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a dual power supply switching circuit for a generator, which enables and controls a mains switching module and a generator switching module so that the load switches corresponding to the mains switching module and the generator switching module are energized to supply power to the load.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dual power supply switching circuit for a generator comprises a mains switching module, a generator switching module and a control module, wherein the control module is connected to the mains switching module and the generator switching module respectively, and the control module enables the mains switching module and the generator switching module to control the mains switching module and the generator switching module so that the load switches corresponding to the mains switching module and the generator switching module are closed to supply power to the load, and the switch states of the load switches corresponding to the mains switching module and the generator switching module are opposite to each other.

[0007] Furthermore, the AC power switching module includes a first bidirectionally conductive magnetic latching relay, which disconnects the load switch K7 by energizing the coil K3 in the forward direction and closes the load switch K7 by energizing the coil K3 in the reverse direction.

[0008] Further, the mains switching module also includes a transistor Q1, a transistor Q3, a transistor Q5, a resistor R1, a resistor R3, a resistor R5, a resistor R7, a diode D1 and a diode D3, the base of the transistor Q5 is connected to the control module, the emitter of the transistor Q5 is grounded, the collector of the transistor Q5 is connected to one end of the resistor R5, the other end of the resistor R5 is respectively connected to one end of the resistor R1 and the base of the transistor Q1, the other end of the resistor R1 is respectively connected to the emitter of the transistor Q1, the negative electrode of the diode D1 and one end of the first magnetic latching relay coil K1, and their common connection terminal is connected to a 12V voltage, and the collector of the transistor Q1 is respectively connected to the first The first contact of the magnetic latching relay and the cathode of the diode D3, the anode of the diode D3 is grounded, the base of the transistor Q3 is respectively connected to one end of the resistor R3 and one end of the resistor R7, the other end of the resistor R7 is connected to the control module, the emitter of the transistor Q3 and the other end of the resistor R3 are grounded, the collector of the transistor Q3 is respectively connected to the anode of the diode D1 and the other end of the first magnetic latching relay coil K1, the third contact of the first magnetic latching relay is respectively connected to one end of the coil K3 and the sixth contact, the fourth contact of the first magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K3, and the second contact of the first magnetic latching relay is grounded.

[0009] Furthermore, the coil K3 of the first magnetic holding relay is provided with a first detection circuit for detecting the energized state of the coil K3, the first detection circuit comprising a resistor R11 and a switch K5, one end of the resistor R11 being connected to a 12V voltage, the other end of the resistor R11 being connected to one end of the switch K5, and their common connection end being connected to a control module, the other end of the switch K5 being grounded.

[0010] Furthermore, the generator switching module includes a second bidirectionally conductive magnetic latching relay, which disconnects the load switch K8 by energizing the coil K4 in the forward direction and closes the load switch K8 by energizing the coil K4 in the reverse direction.

[0011] Further, the generator switching module also includes a transistor Q3, a transistor Q4, a transistor Q6, a resistor R2, a resistor R4, a resistor R6, a resistor R8, a diode D2 and a diode D4, the base of the transistor Q6 is connected to the control module, the emitter of the transistor Q6 is grounded, the collector of the transistor Q6 is connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to one end of the resistor R2 and the base of the transistor Q2, the other end of the resistor R2 is respectively connected to the emitter of the transistor Q2, the negative electrode of the diode D2 and one end of the second magnetic latching relay coil K2, and their common connection terminal is connected to a 12V voltage, and the collector of the transistor Q2 is respectively connected to the first The first contact of the second magnetic latching relay and the cathode of the diode D4, the anode of the diode D4 is grounded, the base of the transistor Q4 is respectively connected to one end of the resistor R4 and one end of the resistor R8, the other end of the resistor R8 is connected to the control module, the emitter of the transistor Q4 and the other end of the resistor R4 are grounded, the collector of the transistor Q4 is respectively connected to the anode of the diode D2 and the other end of the coil K2 of the second magnetic latching relay, the third contact of the second magnetic latching relay is respectively connected to one end of the coil K4 and the sixth contact, the fourth contact of the second magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K4, and the second contact of the second magnetic latching relay is grounded.

[0012] Furthermore, the coil K4 of the second magnetic holding relay is provided with a second detection circuit for detecting the energized state of the coil K4, the second detection circuit includes a resistor R9 and a switch K6, one end of the resistor R9 is connected to a 12V voltage, the other end of the resistor R9 is connected to one end of the switch K6, and their common connection end is connected to a control module, and the other end of the switch K6 is grounded.

[0013] The beneficial effects of the utility model are:

[0014] 1. In the utility model, by enabling and controlling the AC power switching module and the generator switching module, the load switches corresponding to the AC power switching module and the generator switching module are closed to supply power to the load; at the same time, in conjunction with a bidirectionally conductive magnetic latching relay, a low-temperature control effect of energy saving and consumption reduction is achieved.

[0015] 2. In the present invention, the first detection circuit and the second detection circuit are provided to achieve interlocking control of the first magnetic latching relay and the second magnetic latching relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a circuit diagram of a dual power switching circuit in this embodiment;

[0017] Figure 2 is a circuit diagram of the first detection circuit in this embodiment;

[0018] Figure 3 Schematic diagram of a circuit of the second detection circuit in this embodiment.

[0019] Reference numerals: mains switching module 1 ; generator switching module 2 ; control module 3 ; first detection circuit 4 ; second detection circuit 5 . DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment: A dual power switching circuit for a generator, such as Figure 1-Figure 3 As shown, it includes a mains switching module 1, a generator switching module 2 and a control module 3. The control module 3 is connected to the mains switching module 1 and the generator switching module 2 respectively. The control module 3 enables the mains switching module 1 and the generator switching module 2 to control the mains switching module 1 and the generator switching module 2 so that the load switches corresponding to the mains switching module 1 and the generator switching module 2 are closed to supply power to the load, and the switch states of the load switches corresponding to the mains switching module 1 and the generator switching module 2 are opposite to each other.

[0022] Furthermore, the AC power switching module 1 includes a first bidirectionally conductive magnetic latching relay, which disconnects the load switch K7 by energizing the coil K3 in the forward direction to disconnect the load from the AC power; and closes the load switch K7 by energizing the coil K3 in the reverse direction to supply the load with AC power.

[0023] The generator switching module 2 includes a second bidirectionally conductive magnetic latching relay. The second magnetic latching relay is energized in the forward direction through the coil K4 to disconnect the load switch K8, so as to disconnect the generator from the load; the second magnetic latching relay is energized in the reverse direction through the coil K4 to attract the load switch K8, so as to supply power to the load from the generator.

[0024] By switching the mains switching module 1 and the generator switching module 2, the mains and the generator are powered on to the load, and the generator is disconnected from the load during the mains power supply to the load, and the mains and the load are disconnected during the generator power supply to the load. At the same time, the switching state of the load switch is switched by using a magnetic latching relay to achieve a low-temperature control effect of energy saving and consumption reduction.

[0025] Specifically, the mains switching module 1 also includes a transistor Q1, a transistor Q3, a transistor Q5, a resistor R1, a resistor R3, a resistor R5, a resistor R7, a diode D1 and a diode D3. The base of the transistor Q5 is connected to the chip MCU in the control module 3, the emitter of the transistor Q5 is grounded, the collector of the transistor Q5 is connected to one end of the resistor R5, the other end of the resistor R5 is respectively connected to one end of the resistor R1 and the base of the transistor Q1, the other end of the resistor R1 is respectively connected to the emitter of the transistor Q1, the negative electrode of the diode D1 and one end of the first magnetic latching relay coil K1, and the common connection terminal thereof is connected to a 12V voltage, and the collector of the transistor Q1 is respectively connected to the first A first contact of a magnetic latching relay and a cathode of a diode D3, an anode of the diode D3 is grounded, a base of the transistor Q3 is respectively connected to one end of the resistor R3 and one end of the resistor R7, the other end of the resistor R7 is connected to the chip MCU in the control module 3, an emitter of the transistor Q3 and the other end of the resistor R3 are grounded, a collector of the transistor Q3 is respectively connected to the anode of the diode D1 and the other end of the coil K1 of the first magnetic latching relay, a third contact of the first magnetic latching relay is respectively connected to one end of the coil K3 and the sixth contact, a fourth contact of the first magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K3, and a second contact of the first magnetic latching relay is grounded.

[0026] The generator switching module 2 also includes a transistor Q3, a transistor Q4, a transistor Q6, a resistor R2, a resistor R4, a resistor R6, a resistor R8, a diode D2 and a diode D4. The base of the transistor Q6 is connected to the chip MCU in the control module 3, the emitter of the transistor Q6 is grounded, the collector of the transistor Q6 is connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to one end of the resistor R2 and the base of the transistor Q2, the other end of the resistor R2 is respectively connected to the emitter of the transistor Q2, the negative electrode of the diode D2 and one end of the second magnetic latching relay coil K2, and the common connection terminal thereof is connected to a 12V voltage, and the collector of the transistor Q2 is respectively connected to the second The first contact of the magnetic latching relay and the cathode of the diode D4, the anode of the diode D4 is grounded, the base of the transistor Q4 is respectively connected to one end of the resistor R4 and one end of the resistor R8, the other end of the resistor R8 is connected to the chip MCU in the control module 3, the emitter of the transistor Q4 and the other end of the resistor R4 are grounded, the collector of the transistor Q4 is respectively connected to the anode of the diode D2 and the other end of the coil K2 of the second magnetic latching relay, the third contact of the second magnetic latching relay is respectively connected to one end of the coil K4 and the sixth contact, the fourth contact of the second magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K4, and the second contact of the second magnetic latching relay is grounded.

[0027] The control module 3 includes a chip MCU, which is respectively connected to the base of the transistor Q5 and the other end of the resistor R7 in the mains switching module 1, and is respectively connected to the base of the transistor Q6 and the other end of the resistor R8 in the generator switching module 2.

[0028] When the generator is used to supply power to the load, the chip MCU outputs an enable to turn on the transistor Q5, and at the same time, the chip MCU does not output an enable to the resistor R7, the first contact of the first magnetic latching relay is connected to its third contact, and the second contact is connected to the fifth contact, so that the coil K3 current is positively magnetized, and the load switch K7 is disconnected by the magnetic force generated by the coil K3, so as to disconnect the AC power from the load; at the same time, the chip MCU outputs an enable to the resistor R8, and does not output an enable to the transistor Q6, the coil K2 of the second magnetic latching relay is energized to generate a magnetic force, so that the first contact is connected to the third contact, the second contact is connected to the sixth contact, the coil K4 current is reversely magnetized, and the load switch K8 is attracted by the magnetic force generated by the coil K4, so as to realize the generator supplying power to the load;

[0029] When the load is powered by AC power, the chip MCU outputs an enable to turn on the transistor Q6, and at the same time, the chip MCU does not output an enable to the resistor R8. The first contact of the second magnetic holding relay is connected to its third contact, and the second contact is connected to the fifth contact, so that the coil K4 current is forward magnetized, and the load switch K8 is disconnected by the magnetic force generated by the coil K4 to disconnect the generator from the load; at the same time, the chip MCU outputs an enable to the resistor R7, and does not output an enable to the transistor Q5. The coil K1 of the first magnetic holding relay is energized to generate a magnetic force, so that the first contact is connected to the third contact, and the second contact is connected to the sixth contact. The coil K3 current is reversely magnetized, and the load switch K7 is attracted by the magnetic force generated by the coil K3 to power the load with AC power.

[0030] Furthermore, in order to ensure the interlocking control of the first magnetic latching relay for AC power supply and the second magnetic latching relay for generator power supply, a first detection circuit 4 for detecting the energized state of coil K3 and a second detection circuit 5 for detecting the energized state of coil K4 are respectively provided.

[0031] Among them, Figure 2 As shown, the first detection circuit 4 includes a resistor R11 and a switch K5, one end of the resistor R11 is connected to a 12V voltage, the other end of the resistor R11 is connected to one end of the switch K5, and their common connection end is connected to the chip MCU in the control module 3, and the other end of the switch K5 is grounded.

[0032] like Figure 3 As shown, the second detection circuit 5 includes a resistor R9 and a switch K6, one end of the resistor R9 is connected to a 12V voltage, the other end of the resistor R9 is connected to one end of the switch K6, and their common connection end is connected to the chip MCU in the control module 3, and the other end of the switch K6 is grounded.

[0033] When the mains supplies power to the load, that is, the coil K3 of the first magnetic latching relay is reversely magnetized, and the load switch K7 is attracted by the magnetic force generated by the coil K3. At this time, the chip MCU detects that the coil K4 is at a high level through the second detection circuit 5. In this state, the chip MCU will not enable the generator to control the second magnetic latching relay to enable or enable the resistor R8 until the coil K3 of the first magnetic latching relay is forwardly magnetized and the second detection circuit 5 detects that the coil K4 is at a low level before resuming the action.

[0034] When the generator supplies power to the load, that is, the coil K4 current of the second magnetic latching relay is reversely magnetized, and the load switch K8 is attracted by the magnetic force generated by the coil K4. At this time, the chip MCU detects that the coil K3 is at a high level through the first detection circuit 4. In this state, the chip MCU will not enable the AC power to control the first magnetic latching relay or the resistor R7 until the coil K4 current of the second magnetic latching relay is forwardly magnetized and the first detection circuit 4 detects that the coil K3 is at a low level before resuming operation.

[0035] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dual power switching circuit for a generator, comprising a mains switching module (1), a generator switching module (2) and a control module (3), characterized in that: The control module (3) is connected to the mains switching module (1) and the generator switching module (2) respectively. The control module (3) controls the mains switching module (1) and the generator switching module (2) by enabling them, so that the load switches corresponding to the mains switching module (1) and the generator switching module (2) are closed to supply power to the load, and the switch states of the load switches corresponding to the mains switching module (1) and the generator switching module (2) are opposite to each other.

2. A dual power switching circuit for a generator according to claim 1, characterized in that: The mains switching module (1) comprises a first bidirectionally conductive magnetic latching relay, which disconnects the load switch K7 by energizing the coil K3 in the forward direction and closes the load switch K7 by energizing the coil K3 in the reverse direction.

3. A dual power switching circuit for a generator according to claim 2, characterized in that: The mains switching module (1) further comprises a transistor Q1, a transistor Q3, a transistor Q5, a resistor R1, a resistor R3, a resistor R5, a resistor R7, a diode D1 and a diode D3, the base of the transistor Q5 being connected to the control module (3), the emitter of the transistor Q5 being grounded, the collector of the transistor Q5 being connected to one end of the resistor R5, the other end of the resistor R5 being respectively connected to one end of the resistor R1 and the base of the transistor Q1, the other end of the resistor R1 being respectively connected to the emitter of the transistor Q1, the negative electrode of the diode D1 and one end of the first magnetic latching relay coil K1, and the common connection terminal thereof being connected to a 12V voltage, the collector of the transistor Q1 being respectively connected to the first The first contact of the magnetic latching relay and the cathode of the diode D3 are connected, the anode of the diode D3 is grounded, the base of the transistor Q3 is respectively connected to one end of the resistor R3 and one end of the resistor R7, the other end of the resistor R7 is connected to the control module (3), the emitter of the transistor Q3 and the other end of the resistor R3 are grounded, the collector of the transistor Q3 is respectively connected to the anode of the diode D1 and the other end of the first magnetic latching relay coil K1, the third contact of the first magnetic latching relay is respectively connected to one end of the coil K3 and the sixth contact, the fourth contact of the first magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K3, and the second contact of the first magnetic latching relay is grounded.

4. A dual power switching circuit for a generator according to claim 2, characterized in that: The coil K3 of the first magnetic latching relay is provided with a first detection circuit (4) for detecting the energized state of the coil K3. The first detection circuit (4) comprises a resistor R11 and a switch K5. One end of the resistor R11 is connected to a 12V voltage, the other end of the resistor R11 is connected to one end of the switch K5, and their common connection end is connected to a control module (3). The other end of the switch K5 is grounded.

5. A dual power switching circuit for a generator according to claim 1, characterized in that: The generator switching module (2) comprises a second bidirectionally conductive magnetic latching relay, which disconnects the load switch K8 by energizing the coil K4 in the forward direction and closes the load switch K8 by energizing the coil K4 in the reverse direction.

6. A dual power switching circuit for a generator according to claim 5, characterized in that: The generator switching module (2) further comprises a transistor Q3, a transistor Q4, a transistor Q6, a resistor R2, a resistor R4, a resistor R6, a resistor R8, a diode D2 and a diode D4, the base of the transistor Q6 being connected to the control module (3), the emitter of the transistor Q6 being grounded, the collector of the transistor Q6 being connected to one end of the resistor R6, the other end of the resistor R6 being respectively connected to one end of the resistor R2 and the base of the transistor Q2, the other end of the resistor R2 being respectively connected to the emitter of the transistor Q2, the negative electrode of the diode D2 and one end of the second magnetic latching relay coil K2, and the common connection terminal thereof being connected to a 12V voltage, the collector of the transistor Q2 being respectively connected to the second The first contact of the magnetic latching relay and the cathode of the diode D4, the anode of the diode D4 is grounded, the base of the transistor Q4 is respectively connected to one end of the resistor R4 and one end of the resistor R8, the other end of the resistor R8 is connected to the control module (3), the emitter of the transistor Q4 and the other end of the resistor R4 are grounded, the collector of the transistor Q4 is respectively connected to the anode of the diode D2 and the other end of the coil K2 of the second magnetic latching relay, the third contact of the second magnetic latching relay is respectively connected to one end of the coil K4 and the sixth contact, the fourth contact of the second magnetic latching relay is respectively connected to its fifth contact and the other end of the coil K4, and the second contact of the second magnetic latching relay is grounded.

7. A dual power switching circuit for a generator according to claim 5, characterized in that: The coil K4 of the second magnetic latching relay is provided with a second detection circuit (5) for detecting the energized state of the coil K4. The second detection circuit (5) comprises a resistor R9 and a switch K6. One end of the resistor R9 is connected to a 12V voltage, the other end of the resistor R9 is connected to one end of the switch K6, and their common connection end is connected to a control module (3). The other end of the switch K6 is grounded.

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