CN214100967U - Dual-power conversion device applied to vehicle-mounted control system - Google Patents
Dual-power conversion device applied to vehicle-mounted control system Download PDFInfo
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- CN214100967U CN214100967U CN202023346793.2U CN202023346793U CN214100967U CN 214100967 U CN214100967 U CN 214100967U CN 202023346793 U CN202023346793 U CN 202023346793U CN 214100967 U CN214100967 U CN 214100967U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses a be applied to on-vehicle control system's dual supply conversion equipment, including dual supply change over switch and PLC, on-vehicle generator is connected to dual supply change over switch's main power input end, the commercial power is connected to dual supply change over switch's stand-by power supply input end, PLC signal input part includes first input test end and second input test end, first input test end detects on-vehicle generator access signal, second input test end detects the commercial power access signal, the PLC output is according to the input of PLC signal input part's signal control dual supply change over switch main power source and ending, when dual supply change over switch stand-by power supply input end has the commercial power input, PLC control dual supply change over switch main power source ends the input. The power supply of the vehicle-mounted electrical equipment can be switched safely and reliably in a vehicle-mounted power utilization scene. The whole device has small volume, low cost, safety and reliability and convenient use.
Description
Technical Field
The invention relates to double power supply switching, in particular to a double power supply conversion device applied to a vehicle-mounted control system.
Background
With the economic development and the improvement of the living standard of people, more and more special mobile service vehicles are used, and a mobile dining car is one of the special mobile service vehicles. The movable dining car is required to provide temporary catering service at the activity sites of exhibitions, concerts and sports competitions. In general, the mobile dining car can use a three-phase power of a vehicle-mounted generator to supply power to the electrical equipment, and can also use a commercial power at a parking place. However, unlike the requirement for switching between main and backup power supplies in a typical power distribution room, the electrical equipment in a mobile dining car has its own specificity for the power supply. These special requirements are summarized as:
1. the power supply of the vehicle-mounted electrical equipment selects one of commercial power and a vehicle-mounted generator;
2. the power conversion operation is performed on a touch screen connected to the PLC;
3. when the commercial power is adopted for power supply, because the load is large and the installation space in the vehicle is narrow, the large-current and large-volume alternating current contactor cannot be installed on a commercial power input loop from the aspects of cost and reduction of the volume of the distribution box;
4. the reverse power transmission is not allowed, namely, the vehicle-mounted generator is not allowed to transmit power to the commercial power at any time;
5. in the running process of the vehicle, a vehicle-mounted generator is used for supplying power to electrical equipment;
6. after the vehicle arrives at a parking place, if the commercial power is available, the commercial power is used, otherwise, the vehicle-mounted generator is used for supplying power to the electrical equipment;
7. power transitions, including loading and unloading loads, are not allowed beyond a defined load.
Disclosure of Invention
Utility model purpose: to above problem, the utility model provides a safe and reliable and simple carry out the dual power conversion equipment who is applied to vehicle control system who switches to power supply.
The technical scheme is as follows: for realizing above-mentioned design purpose, the utility model discloses the technical scheme who adopts is a be applied to on-vehicle control system's dual supply conversion equipment, including dual supply change over switch and PLC, on-vehicle generator is connected to dual supply change over switch's main power input end, the commercial power is connected to dual supply change over switch's stand-by power input end, PLC signal input part includes first input test end and second input test end, first input test end detects on-vehicle generator and inserts the signal, second input test end detects commercial power and inserts the signal, the PLC output is according to the input of PLC signal input part's signal control dual supply change over switch main power source and ends, when dual supply change over switch stand-by power input end has the commercial power input, PLC control dual supply change over switch main power source ends the input.
The vehicle-mounted power supply system further comprises a first contactor KM1, a second contactor KM2 and a third contactor KM3, wherein the first contactor KM1 controls the on-off of a circuit between the vehicle-mounted power generator and a main power supply input end of a dual-power supply change-over switch; the first input detection end of the PLC is connected with a direct-current power supply through a second contactor KM2, a coil of the second contactor KM2 is powered by a vehicle-mounted generator, and the vehicle-mounted generator is powered on, so that signals are input from the first input detection end of the PLC; the second input detection end of the PLC is connected with a direct-current power supply through a third contactor KM3, a coil of the third contactor KM3 is powered by mains supply, and the mains supply is connected to supply power, so that signals are input into the second input detection end of the PLC; when a signal is input from the second input detection end of the PLC, the output end of the PLC controls the first contactor KM1 to open the circuit.
Further, the vehicle-mounted power supply device further comprises a fourth contactor KM4, wherein the coil of the first contactor KM1 is powered by the vehicle-mounted power generator, the fourth contactor KM4 controls the connection and disconnection of the coil of the first contactor KM1 and the connection circuit of the vehicle-mounted power generator, the coil of the fourth contactor KM4 is powered by the output end of the PLC, when a signal is input from the second input detection end of the PLC, the output end of the PLC supplies power to the coil of the fourth contactor KM4, the fourth contactor KM4 disconnects the connection circuit of the coil of the first contactor KM1 and the vehicle-mounted power generator, and the first contactor KM1 disconnects the circuit between the vehicle-mounted power generator and the main power supply input end of the dual-power supply changeover switch.
Furthermore, the dual-power transfer switch is a motor type dual-power automatic transfer switch.
Furthermore, the PLC supplies power through the output end of the double-power-supply change-over switch.
Has the advantages that: compared with the prior art, the utility model, its advantage is to on-vehicle power consumption scene, can switch the power supply of on-vehicle electrical equipment safe and reliable ground. The whole device has small volume, low cost, safety and reliability and convenient use.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a control flow chart of the PLC of the present invention.
Detailed Description
As shown in fig. 1, a be applied to dual power transfer device of on-vehicle control system, including dual power transfer switch SW1, normally open first contactor KM1, normally open second contactor KM2, normally open third contactor KM3, normally closed fourth contactor KM4 and PLC.
In this embodiment, the dual power transfer switch SW1 adopts a dual power automatic transfer switch based on motor rotation, and drives the internal alternative switch to switch through the rotation of the internal motor. Two input connecting terminals and one output connecting terminal are arranged outside. The input terminals include a main power terminal and a standby power terminal. When only one input connecting terminal has three-phase alternating current, the output connecting terminal is connected with the input connecting terminal; when the main power supply wiring terminal and the standby power supply wiring terminal are both connected with a three-phase power supply, the output wiring terminal is connected with the main power supply wiring terminal. When the main power supply wiring terminal loses power, the motor in the SW1 rotates, and the output wiring terminal is connected with the standby power supply wiring terminal.
Terminals A1, B1, C1 and N1 of a main power input end of the dual-power transfer switch SW1 are connected with contacts 2, 4, 6 and 8 of a first contactor KM1, and contacts 1, 3, 5 and 7 of the first contactor KM1 are connected with a three-phase alternating current power supply output by the vehicle-mounted generator; the connection terminals A2, B2, C2 and N2 of the standby power supply input end of the dual power supply changeover switch SW1 are connected with a three-phase alternating current power supply of commercial power, and because the load is small when a vehicle-mounted generator is used for supplying power to electrical equipment, the KM1 can adopt a low-current alternating current contactor type. The output terminal A, B, C, N of the dual power transfer switch SW1 is used by the onboard electrical equipment.
PLC realizes the switching of on-vehicle generator and commercial power supply through the disconnection of control first contactor KM1, and PLC is the output of selection relay type, and PLC includes feed end, output and signal input part, and the PLC feed end is connected with dual power change over switch SW 1's output, and one looks in the three phase current that PLC's power supply selected dual power change over switch SW1 output. The PLC signal input end comprises a first input detection end I1 and a second input detection end I2, the first input detection end I1 is connected with one contact of a second contactor KM2, the other contact of the second contactor KM2 is connected with a 24V direct-current power supply, a coil of the second contactor KM2 is supplied with power by one phase of a three-phase power supply of the vehicle-mounted generator, and the first input detection end I1 detects an access signal of the vehicle-mounted generator; the second input detection terminal I2 is connected with one contact of the third contactor KM3, the other contact of the third contactor KM3 is connected with a 24V direct-current power supply, a coil of the third contactor KM3 is supplied with power by one phase of a mains supply three-phase power supply, and the second input detection terminal I2 detects a mains supply access signal.
The PLC output end controls the input and the cut-off of a main power supply of a double-power-supply changeover switch, the PLC output end is connected with one end of a coil of a fourth contactor KM4, the other end of the coil of the fourth contactor KM4 is connected with an N wire, whether the coil of the fourth contactor KM4 has current or not is controlled through the PLC output end, the on-off of a fourth contactor KM4 is controlled, the fourth contactor KM4 is a normally closed contactor, one contact of the fourth contactor KM4 is connected with one end of a coil of a first contactor KM1, the other contact of the fourth contactor KM4 is connected with a zero line of a three-phase power supply of a vehicle-mounted generator, the other end of the coil of the first contactor KM1 is connected with one end of the three-phase power supply of the vehicle-mounted generator, when the PLC output end outputs signals, the coil of the fourth contactor KM4 is electrified, the fourth contactor KM4 is disconnected, so that the coil of the first contactor KM1 is electrified, the first contactor KM1 is disconnected, and the terminal of the double-power-supply changeover switch 1 is disconnected, so that the connection terminal of the SW connector is disconnected, at the moment, the dual-power transfer switch is connected to the mains supply.
When the vehicle runs, in order to keep the vehicle-mounted equipment to work normally, the power supply of the vehicle-mounted generator needs to be connected, and at the moment, no commercial power is connected. Because the coil of the first contactor KM1 is connected with the normally closed fourth contactor KM4, the vehicle-mounted generator provides alternating-current 220V phase voltage to be added to the coil of the first contactor KM1, the coil of the first contactor KM1 is electrified, the first contactor KM1 is conducted, the dual-power supply changeover switch SW1 outputs power supply provided by the vehicle-mounted generator, the PLC power supply end works after obtaining the power supply, the switching inputs of the second contactor KM2 and the third contactor KM3 are detected through the first input detection end I1 and the second input detection end I2, information that the vehicle-mounted generator inputs the power supply and the commercial power does not have the input power supply is obtained, no output signal exists at the PLC output end, the coil of the fourth contactor KM4 is not electrified, and the normally closed switch of the fourth contactor KM4 is continuously kept in a connection state, so that the dual-power supply changeover switch SW1 keeps outputting the vehicle-mounted generator power supply.
And after the vehicle arrives at the parking place, if no commercial power is available, the original working state is continuously maintained. If the commercial power is available, the dual power supply changeover switch SW1 needs to output the commercial power for the vehicle-mounted electrical equipment to use. Because the current load of commercial power is 0, vehicle operation personnel can directly access the commercial power under the vehicle. At the moment, the dual-power transfer switch SW1 is connected to both the vehicle-mounted generator power supply and the commercial power supply, and because the vehicle-mounted generator power supply is connected to the main power terminal of the dual-power transfer switch SW1, the dual-power transfer switch SW1 maintains outputting the vehicle-mounted generator power supply according to the working characteristics of the dual-power transfer switch SW 1. At the moment, a vehicle operator can get on the vehicle and unload the load temporarily through the touch screen connected to the PLC, then the work of the vehicle-mounted generator is stopped, because the main power line terminal of the dual power supply changeover switch SW1 is not connected with the power supply, the standby power supply wiring terminal is connected with the commercial power, the dual power supply changeover switch SW1 switches and outputs the commercial power, the PLC is powered on to work, and then the load is loaded through the touch screen of the PLC. In order to ensure the safety and prevent the power supply of the vehicle-mounted generator from being switched in by mistake after the vehicle-mounted generator is started, the output end of the PLC continues to supply power to the coil of the fourth contactor KM4, and the normally closed contact of the fourth contactor KM4 is in a disconnected state, so that even if the vehicle-mounted generator is started, the power supply of the vehicle-mounted generator cannot be switched in a main power supply wiring terminal of the dual-power-supply changeover switch SW1 because the contact of the first contactor KM1 is in the disconnected state.
When the vehicle needs to be transferred, the vehicle operator starts the vehicle-mounted generator on the vehicle firstly, and the power supply of the electrical equipment is still from the commercial power because the normally closed contact of the fourth contactor KM4 is in an open state. The staff unloads all loads through the touch-sensitive screen that is connected to the PLC. And then presses a switch command button on the touch screen. The PLC output end does not output signals any more, the coil of the fourth contactor KM4 loses power, the normally closed contact of the fourth contactor KM4 is connected, the power supply of the vehicle-mounted generator is connected to the main power supply wiring terminal of the dual-power-supply changeover switch SW1, the dual-power-supply changeover switch SW1 is changed to output the power supply of the vehicle-mounted generator, and then vehicle operators load the load. At the moment, although the commercial power supply is also connected to the dual-power-supply changeover switch SW1, no load is applied to commercial power, so that vehicle operators can get off the vehicle and directly pull out the commercial power plug, and then drive the vehicle to a new parking place.
Claims (5)
1. The utility model provides a be applied to on-vehicle control system's dual supply conversion equipment, a serial communication port, including dual supply change over switch and PLC, on-vehicle generator is connected to dual supply change over switch's main power input end, the commercial power is connected to dual supply change over switch's stand-by power input end, PLC signal input end includes first input test end and second input test end, first input test end detects on-vehicle generator access signal, second input test end detects commercial power access signal, the PLC output is according to PLC signal input end's signal control dual supply change over switch main power input with end, when dual supply change over switch stand-by power input end has the commercial power input, PLC control dual supply change over switch main power ends the input.
2. The dual-power-supply conversion device according to claim 1, further comprising a first contactor KM1, a second contactor KM2 and a third contactor KM3, wherein the first contactor KM1 controls the on/off of a circuit between a vehicle-mounted generator and a main power input end of the dual-power-supply conversion switch; the first input detection end of the PLC is connected with a direct-current power supply through a second contactor KM2, a coil of the second contactor KM2 is powered by a vehicle-mounted generator, and the vehicle-mounted generator is powered on, so that signals are input from the first input detection end of the PLC; the second input detection end of the PLC is connected with a direct-current power supply through a third contactor KM3, a coil of the third contactor KM3 is powered by mains supply, and the mains supply is connected to supply power, so that signals are input into the second input detection end of the PLC; when a signal is input from the second input detection end of the PLC, the output end of the PLC controls the first contactor KM1 to open the circuit.
3. The dual-power-supply conversion device according to claim 2, further comprising a fourth contactor KM4, wherein the coil of the first contactor KM1 is powered by the vehicle-mounted generator, the fourth contactor KM4 controls the connection between the coil of the first contactor KM1 and the vehicle-mounted generator, the coil of the fourth contactor KM4 is powered by the output end of the PLC, when a signal is input from the second input detection end of the PLC, the output end of the PLC supplies power to the coil of the fourth contactor KM4, the fourth contactor KM4 disconnects the connection between the coil of the first contactor KM1 and the vehicle-mounted generator, and the first contactor KM1 disconnects the circuit between the vehicle-mounted generator and the main power supply input end of the dual-power-supply conversion switch.
4. The dual power transfer device of claim 1, wherein the dual power transfer switch is a motor-type dual power automatic transfer switch.
5. The dual power transfer device of claim 1, wherein the PLC is powered through an output of a dual power transfer switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023346793.2U CN214100967U (en) | 2020-12-31 | 2020-12-31 | Dual-power conversion device applied to vehicle-mounted control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023346793.2U CN214100967U (en) | 2020-12-31 | 2020-12-31 | Dual-power conversion device applied to vehicle-mounted control system |
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| Publication Number | Publication Date |
|---|---|
| CN214100967U true CN214100967U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023346793.2U Active CN214100967U (en) | 2020-12-31 | 2020-12-31 | Dual-power conversion device applied to vehicle-mounted control system |
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- 2020-12-31 CN CN202023346793.2U patent/CN214100967U/en active Active
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