CN108964246B - Main/standby power supply switching method and system of test equipment - Google Patents
Main/standby power supply switching method and system of test equipment Download PDFInfo
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- CN108964246B CN108964246B CN201810824599.9A CN201810824599A CN108964246B CN 108964246 B CN108964246 B CN 108964246B CN 201810824599 A CN201810824599 A CN 201810824599A CN 108964246 B CN108964246 B CN 108964246B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The embodiment of the invention discloses a method and a system for switching a main power supply and a standby power supply of test equipment, and relates to the field of power supply of servers. The switching method comprises the steps that an inverter output circuit is set into two control circuits which are connected in parallel; the bypass circuit is set into two control circuits which are mutually connected in parallel; relays are respectively arranged in the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit, and each relay is independently controlled through a control signal. According to the method and the system for switching the main power supply and the standby power supply, the main power supply and the standby power supply are switched and controlled through the four independent control signal circuits, and the generation of large current in the power supply switching process is avoided by using the time difference and the NTC, so that the damage of the large current to the relay is avoided, the failure rate of equipment and the economic loss caused by the power failure of the equipment are reduced, the service life of the device is prolonged, and the testing efficiency is improved.
Description
Technical Field
The embodiment of the invention relates to the field of server power supply, in particular to a method and a system for switching a main power supply and a standby power supply of test equipment.
Background
In the process of testing the server, the power supply device of the testing equipment mainly adopts a main power supply and standby power supply switching device. The existing main power supply and standby power supply switching device circuit is shown in the attached figure 1, and the device often has the problem of relay damage in the using process, and the reason is as follows: on one hand, the switching process of the main power supply and the standby power supply is on-load switching, and current flows through the relay, so that an arc discharge phenomenon occurs, and the relay is damaged; on the other hand, the capacitor energy storage of the main power supply and the standby power supply is emptied in the switching process, so that large current flows when the relay is switched to the other side, and the relay is damaged. The damage of the relay increases the failure rate of the power supply switching device and reduces the testing efficiency.
Based on the above problems, the invention provides a method and a system for switching a main power supply and a standby power supply of a test device, which effectively reduce the failure rate of the main power supply and the standby power supply switching device, prolong the service life of the switching device and improve the test efficiency of the device.
Disclosure of Invention
The embodiment of the invention provides a method and a system for switching a main power supply and a standby power supply of test equipment, which solve the problem of damage to a relay caused by the generation of large current in the switching process of the main power supply and the standby power supply, reduce the failure rate of the equipment and improve the test efficiency.
In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:
the first aspect of the present invention provides a method for switching a main power supply and a standby power supply of a test device, the method comprising the following steps:
the output circuit of the inverter is set into two control circuits which are connected in parallel;
the bypass circuit is set into two control circuits which are mutually connected in parallel;
relays are respectively arranged in the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit, and each relay is independently controlled through a control signal.
Based on the scheme, the method is optimized as follows:
furthermore, the control circuit of the inverter output circuit is a first circuit and a second circuit which are connected in parallel, and a thermistor with a negative temperature system is connected in series in the first circuit.
The control circuit of the bypass circuit is a third circuit and a fourth circuit which are connected in parallel, and a thermistor with a negative temperature system is connected in series in the third circuit.
Specifically, according to the method for switching the main power supply and the standby power supply of the test equipment, when the power supply circuit is switched from the bypass circuit to the inverter output circuit, the control circuit performs the following operations:
firstly, the control signal of the second circuit controls the relay to be switched off, and the control signal of the third circuit controls the relay to be switched on;
then after 1ms delay, the control signal of the fourth circuit controls the relay to be closed;
the control signal of the third circuit then controls the relay to open after a 1ms delay.
When the power supply circuit is switched from the inverter output circuit to the bypass circuit, the control circuit performs the following operations:
firstly, a control signal of a first circuit controls a relay to be closed, and a control signal of a fourth circuit controls the relay to be opened;
then after 1ms delay, the control signal of the second circuit controls the relay to be closed;
next after a 1ms delay, the control signal of the first circuit controls the relay to open.
The invention provides a main and standby power supply switching system of test equipment in a second aspect, which comprises an inverter output circuit, a bypass circuit and a control signal circuit, wherein the inverter output circuit, the bypass circuit and the control signal circuit are electrically connected;
the inverter output circuit is two control circuits which are mutually connected in parallel;
the bypass circuit is two control circuits which are mutually connected in parallel;
the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit are respectively provided with a relay, and each relay realizes the control through an independent control signal circuit.
Further, the control circuit of the inverter output circuit comprises a first circuit and a second circuit, and a thermistor with a negative temperature system is connected in series in the first circuit.
The control circuit of the bypass circuit comprises a third circuit and a fourth circuit, and a thermistor with a negative temperature system is connected in series in the third circuit.
Specifically, in the main/standby power supply switching system of the test equipment, when the bypass circuit is powered off, the control signal of the second circuit controls the relay to be switched off, and the control signal of the third circuit controls the relay to be switched on; then after 1ms delay, the control signal of the fourth circuit controls the relay to be closed; the control signal of the third circuit then controls the relay to open after a 1ms delay.
When the bypass circuit returns to normal, the control signal of the first circuit controls the relay to be closed, and the control signal of the fourth circuit controls the relay to be disconnected; then after 1ms delay, the control signal of the second circuit controls the relay to be closed; next after a 1ms delay, the control signal of the first circuit controls the relay to open.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the method for switching the main power supply and the standby power supply of the test equipment comprises the steps that an inverter output circuit is set into two control circuits which are connected in parallel; the bypass circuit is set into two control circuits which are mutually connected in parallel; relays are respectively arranged in the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit, and each relay is independently controlled through a control signal. According to the method for switching the main power supply and the standby power supply, the main power supply and the standby power supply are switched and controlled through the four independent control signal circuits, and the generation of large current in the power supply switching process is avoided by utilizing the time difference and the NTC, so that the damage of the large current to the relay is avoided, the failure rate of equipment and the economic loss caused by the power failure of the equipment are reduced, the service life of the device is prolonged, and the testing efficiency is improved.
The main/standby power switching system of the test equipment in the second aspect of the invention can realize the switching method in the first aspect and achieve the same effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic circuit diagram of a main/standby power switching method of a conventional test device;
fig. 2 is a schematic flowchart of a method for switching between a main power supply and a standby power supply of a test device according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a main/standby power switching method and a switching system of a test device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a main/standby power supply switching system of a test device according to an embodiment of the present application.
1-inverter output circuit, 2-bypass circuit and 3-control signal circuit.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the convenience of understanding the contents of the present invention and the accompanying drawings, the English abbreviations referred to in the present invention are explained and illustrated.
BYPASS: the bypass is one path of the mains supply which is normally powered;
NTC: a thermistor having a negative temperature coefficient;
RLY: a relay.
Fig. 2 and fig. 3 are a schematic flowchart and a schematic circuit diagram of a method for switching between a main power supply and a standby power supply of a test device according to an embodiment of the present application, and as can be seen from fig. 2 and fig. 3, the method for switching between power supplies according to the embodiment includes the following steps:
s1, arranging an inverter output circuit into two control circuits which are connected in parallel, wherein a thermistor with a negative temperature system is connected in series in one control circuit;
s2, setting the bypass circuit into two control circuits which are mutually connected in parallel, wherein a thermistor with a negative temperature system is connected in series in one control circuit;
and S3, respectively arranging relays in the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit, and realizing independent control of each relay through control signals.
Specifically, as shown in fig. 3, the control circuit of the inverter output circuit is a first circuit and a second circuit connected in parallel, and a thermistor having a negative temperature system is connected in series to the first circuit. The control circuit of the bypass circuit is a third circuit and a fourth circuit which are connected in parallel, and a thermistor with a negative temperature system is connected in series in the third circuit.
As shown in fig. 3, when the BYPASS circuit is powered down, i.e. the power supply circuit is switched from the BYPASS circuit to the inverter output circuit, RLY1 is at terminal 3, RLY2, RLY3 and RLY4 are at terminal 5, then the control signals respectively control RLY2 and RLY3 to spring from terminal 5 to terminal 3, and RLY4 springs from terminal 5 to terminal 3 after 1ms delay, and then RLY3 springs from terminal 3 to terminal 5 after 1ms delay.
When the BYPASS is recovered, that is, the power supply circuit is switched from the inverter output circuit to the BYPASS circuit, at this time, RLY1, RLY2 and RLY4 are at the 3 terminal, RLY3 is at the 5 terminal, next the control signals control RLY1 and RLY4 to bounce from the 3 terminal to the 5 terminal respectively, and RLY2 bounces from the 3 terminal to the 5 terminal after 1ms delay, and then RLY1 bounces from the 5 terminal to the 3 terminal after 1ms delay.
Fig. 4 is a schematic structural diagram of a main/standby power switching system of a testing device according to an embodiment of the present application, and as can be seen from fig. 4, the switching system of this embodiment includes an inverter output circuit 1, a bypass circuit 2, and a control signal circuit 3, where the inverter output circuit, the bypass circuit, and the control signal circuit are electrically connected to each other:
the inverter output circuit 1 is two control circuits which are mutually connected in parallel, wherein a thermistor with a negative temperature system is connected in series in one control circuit;
the bypass circuit 2 is two control circuits which are mutually connected in parallel, wherein a thermistor with a negative temperature system is connected in series in one control circuit;
relays are respectively arranged in the two control circuits of the inverter output circuit 1 and the two control circuits of the bypass circuit 2, and each relay is controlled by an independent control signal circuit 3.
Specifically, the control circuit of the inverter output circuit 1 includes a first circuit in which a thermistor having a negative temperature system is connected in series, and a second circuit. The control circuit of the bypass circuit 2 comprises a third circuit and a fourth circuit, and a thermistor with a negative temperature system is connected in series in the third circuit.
As shown in fig. 3, when the bypass circuit is powered down, i.e. the power supply circuit is switched from the bypass circuit 2 to the inverter output circuit 1, RLY1 is at terminal 3, RLY2, RLY3 and RLY4 are at terminal 5, then the control signals respectively control RLY2 and RLY3 to spring from terminal 5 to terminal 3, and RLY4 springs from terminal 5 to terminal 3 after 1ms delay, and then RLY3 springs from terminal 3 to terminal 5 after 1ms delay.
When the bypass circuit is recovered to be normal, that is, the power supply circuit is switched from the inverter output circuit 1 to the bypass circuit 2, when RLY1, RLY2 and RLY4 are at the 3 terminal and RLY3 is at the 5 terminal, then the control signals respectively control RLY1 and RLY4 to spring from the 3 terminal to the 5 terminal, and RLY2 springs from the 3 terminal to the 5 terminal after 1ms delay, and then RLY1 springs from the 5 terminal to the 3 terminal after 1ms delay.
In the embodiment, the 1ms time difference delay and the NTC are adopted to avoid the generation of large current in the power switching process, so as to play a role in protecting the relay. The magnitude of the time difference can be set according to specific situations, and can be set to other suitable values larger or smaller than 1 ms.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A method for switching a main power supply and a standby power supply of test equipment is characterized by comprising the following steps:
the output circuit of the inverter is set into two control circuits which are connected in parallel;
the bypass circuit is set into two control circuits which are mutually connected in parallel;
relays are respectively arranged in the two control circuits of the inverter output circuit and the two control circuits of the bypass circuit, and each relay is independently controlled through a control signal;
the control circuit of the bypass circuit is a first circuit and a second circuit which are connected in parallel, and a thermistor with a negative temperature coefficient is connected in series in the first circuit;
the control circuit of the inverter output circuit is a third circuit and a fourth circuit which are connected in parallel, and a thermistor with a negative temperature coefficient is connected in series in the third circuit;
when the power supply circuit is switched from the bypass circuit to the inverter output circuit, the control circuit performs the following operations:
firstly, the control signal of the second circuit controls the relay to be switched off, and the control signal of the third circuit controls the relay to be switched on;
then after 1ms delay, the control signal of the fourth circuit controls the relay to be closed;
next, after a delay of 1ms, the control signal of the third circuit controls the relay to be switched off;
when the power supply circuit is switched from the inverter output circuit to the bypass circuit, the control circuit performs the following operations:
firstly, a control signal of a first circuit controls a relay to be closed, and a control signal of a fourth circuit controls the relay to be opened;
then after 1ms delay, the control signal of the second circuit controls the relay to be closed;
next after a 1ms delay, the control signal of the first circuit controls the relay to open.
2. A main power supply and standby power supply switching system of test equipment is characterized by comprising an inverter output circuit, a bypass circuit and a control signal circuit;
the inverter output circuit is two control circuits which are mutually connected in parallel;
the bypass circuit is two control circuits which are mutually connected in parallel;
two control circuits of the inverter output circuit and two control circuits of the bypass circuit are respectively provided with a relay, and each relay realizes the control through an independent control signal circuit;
the control circuit of the bypass circuit comprises a first circuit and a second circuit, and a thermistor with a negative temperature coefficient is connected in series in the first circuit;
the control circuit of the inverter output circuit comprises a third circuit and a fourth circuit, and a thermistor with a negative temperature coefficient is connected in series in the third circuit;
when the bypass circuit is powered off, the control signal of the second circuit controls the relay to be switched off, and the control signal of the third circuit controls the relay to be switched on; then after 1ms delay, the control signal of the fourth circuit controls the relay to be closed; next, after a delay of 1ms, the control signal of the third circuit controls the relay to be switched off;
when the bypass circuit returns to normal, the control signal of the first circuit controls the relay to be closed, and the control signal of the fourth circuit controls the relay to be disconnected; then after 1ms delay, the control signal of the second circuit controls the relay to be closed; next after a 1ms delay, the control signal of the first circuit controls the relay to open.
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| CN201810824599.9A CN108964246B (en) | 2018-07-25 | 2018-07-25 | Main/standby power supply switching method and system of test equipment |
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| CN201810824599.9A CN108964246B (en) | 2018-07-25 | 2018-07-25 | Main/standby power supply switching method and system of test equipment |
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| CN115800976B (en) * | 2023-02-08 | 2023-05-09 | 鲁欧智造(山东)高端装备科技有限公司 | High-speed high-current switching circuit and implementation method thereof |
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