Power source switching equipment and method

Abstract

The invention relates to a power source switching device and method. The equipment comprises a plurality of relay groups, and each relay group comprises a plurality of relays which are connected in parallel; the first power supply is used for supplying power to a coil of the relay group; the relay group controller comprises a plurality of paths of control switches which are connected in parallel, a plurality of power supply loops which are in one-to-one correspondence with the relay groups are formed by the relay group controller and the first power supply, and the relay group controller is used for switching the on-off states of the control switches according to the obtained switching instruction so as to control the on-off of all relays in the corresponding relay groups; a plurality of first wiring terminal strips, each first wiring terminal strip comprising a plurality of first wiring terminals used for connecting the relay and the electric equipment; and the second wiring terminal strip comprises a plurality of second wiring terminals which are used for connecting the relay and the power source. According to the invention, automation of power source switching can be realized, the switching efficiency is improved, and the safety risk is reduced.

Description

Technical Field

[0001] The present invention relates to the field of power distribution technology, and in particular to a power source switching device and method. Background Art

[0002] A power source is a voltage and current signal generating device that can independently adjust the amplitude of voltage and current and the phase difference between the two. This device also includes a standard meter that can accurately measure voltage, current, frequency and virtual power synthesized by voltage and current. Its indication is used as a comparative reference standard to realize the calibration and verification of various measuring devices / systems with variable frequency electrical quantity as the main measurement object. The application of power sources is very wide, including but not limited to circuit testing, circuit debugging, circuit calibration, communication systems, audio equipment sensors and measurement equipment, experimental teaching and research, etc.

[0003] Common power sources on the market usually have 3-phase / 4-phase voltage stable output, 3-phase / 4-phase current stable output, voltage harmonic stable output, current harmonic stable output, and RS485 program control functions. As a standard source, the power source is usually used to test, debug, and calibrate a single electrical device.

[0004] In normal practical use, the power source needs to frequently change the output object (electrical equipment), which has the following defects:

[0005] 1) When replacing electrical equipment, the process is cumbersome and requires operators to switch the power supply, which is inefficient.

[0006] 2) When replacing electrical equipment, wiring errors may occur, causing damage to the electrical equipment or power source.

[0007] 3) When replacing electrical equipment, leakage may occur during wiring, causing electric shock to personnel, posing a safety risk.

[0008] 4) When replacing electrical equipment, the operator needs to switch the power supply, so the test process cannot be automated;

[0009] 5) After the switching system restarts, it cannot automatically execute the operations before the device restarts, and the degree of intelligence is low. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a power source switching device and method, which can realize the automation of power source switching, improve switching efficiency and reduce safety risks.

[0011] The technical solution adopted by the present invention to solve the technical problem is: to provide a power source switching device, comprising:

[0012] A plurality of relay groups, each of which comprises a plurality of relays connected in parallel;

[0013] A first power supply, used to supply power to the coil of the relay group;

[0014] A relay group controller, comprising a plurality of control switches connected in parallel, wherein the control switches and the first power supply form a plurality of power supply circuits corresponding to the relay groups one by one, and the relay group controller is used to switch the switch state of the control switches according to the acquired switching instructions, thereby controlling the on and off of all relays in the corresponding relay group;

[0015] A plurality of first terminal blocks, each of which comprises a plurality of first terminal blocks, and the first terminal blocks are used to connect the relay and the electrical equipment;

[0016] The second terminal row includes a plurality of second terminals, and the second terminals are used to connect the relay and the power source.

[0017] Furthermore, the relay group controller is also used to save the current switch states of all the control switches, and automatically set all the control switches to the switch states saved before power failure after it is powered on again.

[0018] Furthermore, for any relay group, each relay corresponds to an output end of one power source.

[0019] Furthermore, each of the relay groups corresponds to one of the electrical devices.

[0020] Furthermore, each of the first terminal blocks corresponds to one of the relay groups, and in any of the first terminal blocks, each of the first terminal blocks corresponds to one of the relay circuits.

[0021] Furthermore, each of the second wiring terminals corresponds to an output end of the power source.

[0022] Furthermore, the first end of the second terminal is connected to the output end of the corresponding power source, the second end of the second terminal is connected to the input end of the corresponding relay circuit in all the relay groups, the output end of the relay circuit is connected to the first end of the corresponding first terminal, and the second end of the first terminal is connected to the electrical equipment.

[0023] Furthermore, the first end of the control switch is connected to the control input end of the corresponding relay group, the second end of the control switch is connected to the power output end of the first power supply, and the ground end of the first power supply is connected to the control output end of the relay group.

[0024] Furthermore, it also includes a second power supply for supplying power to the controller.

[0025] The present invention also provides a power source switching method, which is applied to the above-mentioned device and comprises the following steps:

[0026] Electrically connecting the first end of each of the second wiring terminals to the output end of the corresponding power source;

[0027] Connecting the second end of each of the first wiring terminals to the corresponding electrical equipment;

[0028] A switching instruction is sent to the relay group controller, so that the relay group controller switches the switch state of the control switch according to the switching instruction, thereby controlling the power source to output power to the corresponding electrical equipment.

[0029] Beneficial Effects

[0030] Due to the adoption of the above-mentioned technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the present invention adopts a terminal group to connect the power source, the relay group and the electrical equipment, which can flexibly adapt to different power sources and power demands, and reduce the safety risk of electric shock caused by leakage when replacing the wiring; by setting the wiring terminals in the terminal group to correspond one-to-one with the output of the power source, and making each electrical equipment correspond to a relay group and an equipment terminal block (i.e., the first terminal block), the line connection is standardized, and power accidents caused by wrong connection and missed connection are effectively prevented; by adopting a relay group controller and a power supply to form a power supply circuit for different relay groups, the power supply circuit is controlled to be on and off according to the instructions of the upper computer, and then the relay is controlled to be on and off, thereby realizing automatic switching of the power source without manual operation, improving switching efficiency and reducing safety risks; by recording the user's most recent usage operation, the device automatically restores the switch state before power failure after restarting, thereby increasing the intelligence and work efficiency of the switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural diagram of a first embodiment of the present invention;

[0032] Figure 2 is a circuit diagram of a first embodiment of the present invention;

[0033] Figure 3 It is a flowchart of the second embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0035] The first embodiment of the present invention relates to a device for switching a single power source output to multiple outputs, such as Figure 1 As shown, the device is composed of a relay group 5, a relay group 6, a relay group 7, a relay group 8, a relay group power supply 12 (i.e., a first power supply), a relay group controller 10, a relay group controller power supply 11 (i.e., a second power supply), a device wiring terminal block 1 (i.e., a first wiring terminal block), a device wiring terminal block 2, a device wiring terminal block 3, a device wiring terminal block 4, and a power source terminal block 9 (i.e., a second wiring terminal block), so as to realize the function of switching a single-channel power source output to a multi-channel device. It should be noted that the number of relay groups and terminal blocks of the present invention can be freely combined. This embodiment is described by taking 4 relay groups and 4 terminal blocks as an example, but is not limited to this.

[0036] The components of the device are described as follows:

[0037] 1) Relay group: The number of relays in the relay module is determined according to the number of power source output harnesses. For example, 12 harnesses use 12 single-open and single-close relays or 6 two-open and two-close relays. These relays are combined into one relay group. The number of relay groups is determined according to the number of electrical devices. For example, four electrical devices require four relay groups for control. The relay can control the on and off of the relay by powering on and off the relay coil with a 5V voltage.

[0038] 2) Relay group power supply: Provides a stable DC 5V voltage to the relay to power the relay coil.

[0039] 3) Relay group controller: A module that can output, disconnect, and switch multiple lines through the RS485 communication interface. It controls the on and off of the relay group by controlling the on and off of the relay group power line. The relay group controller also has the function of memorizing the user's most recent operation. Each time the user turns off the power and then turns it on again, the device will automatically execute the user's most recent operation.

[0040] 4) Relay group controller power supply: Provides a stable DC 5V voltage for the relay group controller.

[0041] 5) Terminal blocks for electrical equipment: Provides a plug-in wiring method using terminal blocks for electrical equipment, which can eliminate safety hazards caused by leakage during wiring and incorrect wiring sequence.

[0042] 6) Power source output terminal block: The power source is provided with a terminal block plug-in wiring method, which can eliminate the safety hazards caused by leakage during the wiring process and incorrect wiring sequence.

[0043] During the specific implementation, the power source switching device is fixedly installed in a suitable position, and then the output line of the power source is inserted into the power source output terminal block, and then the power-consuming device is inserted into the device terminal block to complete the wiring between the device and the power source and the powered device. When the device is connected to the 220V mains, the mains will supply power to the relay controller module power supply and the relay group power supply. Use the RS485 serial communication line to connect the relay group controller to the control device (with a host computer that communicates via serial port), and the control device will communicate with the device via RS485 and issue control instructions.

[0044] When power source output is required, the relay group controller turns on a certain relay group to complete the power source output to a certain device. If the device has been used before, the most recent operation can be automatically executed after the device is powered on.

[0045] When the power source output needs to be switched, the relay group controller turns on a certain relay group to complete the power source output to a certain device. When the power-consuming device needs to be switched, the relay group controller switches the path of the power source output to the power-consuming device to complete the switching of the power source output to multiple power-consuming devices.

[0046] When it is necessary to stop the power source output, the output of the power source is stopped, and then the relay group controller is made to disconnect all the paths.

[0047] A second embodiment of the present invention relates to a method for switching a single-channel power source output to multiple channels, which is applied to a device in the first embodiment, such as Figure 3 As shown, the following steps are included:

[0048] Electrically connecting the first end of each second wiring terminal to the output end of the corresponding power source;

[0049] Connect the second end of each first wiring terminal to the corresponding electrical equipment;

[0050] A switching instruction is sent to the relay group controller, so that the relay group controller switches the switch state of the control switch according to the switching instruction, thereby controlling the power source to output power to the corresponding electrical equipment.

[0051] The specific operation process can be divided into equipment wiring process, power source output process, power source output switching process and power source output stopping process.

[0052] The equipment wiring process specifically includes: the user fixes and installs the equipment provided by the present invention to a suitable position, inserts the output line of the power source into the power source output terminal block, and then inserts the electrical equipment into the equipment terminal block, so as to complete the wiring between the equipment provided by the present invention and the power source and the electrical equipment. The user connects the equipment provided by the present invention to the 220V mains electricity, which is used to supply power to the relay controller module power supply and the relay group power supply. The user also needs to use the RS485 serial communication line to connect the relay group controller to the control device (equipped with a serial communication device), and the control device will communicate with the equipment described in the present invention through RS485 to achieve control of the equipment described in the present invention and data acquisition.

[0053] The power source output process includes: the user communicates with the device provided by the present invention by operating the control device, and the relay group controller turns on a certain relay group to complete the output of the power source to a certain device. If the device has been used before, the most recent operation can be automatically executed after the device is powered on.

[0054] The process of switching the power source output includes: the user communicates with the device provided by the present invention through the operation control device, and the user first turns on a certain relay group to complete the output of the power source to a certain device. When it is necessary to switch the power-consuming device, the user communicates with the device described in the present invention through the control device, and the relay group controller switches the path of the power source output to the device, thereby completing the switching of the power source output to multiple devices.

[0055] The process of stopping the power source output includes: the user stops the output of the power source, and then communicates with the device provided by the present invention through the operation control device, and the device described in the present invention disconnects all paths.

Claims

1. A power source switching device, characterized in that: include: A plurality of relay groups, each of which comprises a plurality of relays connected in parallel; A first power supply, used to supply power to the coil of the relay group; A relay group controller, comprising a plurality of control switches connected in parallel, wherein the control switches and the first power supply form a plurality of power supply circuits corresponding to the relay groups one by one, and the relay group controller is used to switch the switch state of the control switches according to the acquired switching instructions, thereby controlling the on and off of all relays in the corresponding relay group; A plurality of first terminal blocks, each of which comprises a plurality of first terminal blocks, and the first terminal blocks are used to connect the relay and the electrical equipment; The second terminal row includes a plurality of second terminals, and the second terminals are used to connect the relay and the power source.

2. The device according to claim 1, characterized in that The relay group controller is also used to save the current switch states of all the control switches, and automatically set all the control switches to the switch states saved before power failure after it is powered on again.

3. The device according to claim 1, characterized in that For any relay group, each relay corresponds to an output end of the power source.

4. The device according to claim 2, characterized in that Each of the relay groups corresponds to one of the electrical devices.

5. The device according to claim 2, characterized in that Each of the first terminal rows corresponds to one of the relay groups, and each of the first terminal rows in any of the first terminal rows corresponds to one of the relay circuits.

6. The device according to claim 5, characterized in that Each of the second connecting terminals corresponds to an output end of one of the power sources.

7. The device according to claim 6, characterized in that The first end of the second terminal is connected to the output end of the corresponding power source, the second end of the second terminal is connected to the input end of the corresponding relay circuit in all the relay groups, the output end of the relay circuit is connected to the first end of the corresponding first terminal, and the second end of the first terminal is connected to the electrical equipment.

8. The device according to claim 1, characterized in that The first end of the control switch is connected to the control input end of the corresponding relay group, the second end of the control switch is connected to the power output end of the first power supply, and the ground end of the first power supply is connected to the control output end of the relay group.

9. The device according to claim 1, characterized in that Also included is a second power supply for supplying power to the relay group controller.

10. A power source switching method, applied to the device according to claims 1-8, characterized in that: The following steps are involved: electrically connecting the first end of each of the second wiring terminals to the output end of the corresponding power source; Connecting the second end of each of the first wiring terminals to the corresponding electrical equipment; A switching instruction is sent to the relay group controller, so that the relay group controller switches the switch state of the control switch according to the switching instruction, thereby controlling the power source to output power to the corresponding electrical equipment.

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