CN105242221A - DC feedback type DC electronic load for locomotive power supply test - Google Patents
DC feedback type DC electronic load for locomotive power supply test Download PDFInfo
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- CN105242221A CN105242221A CN201510790497.6A CN201510790497A CN105242221A CN 105242221 A CN105242221 A CN 105242221A CN 201510790497 A CN201510790497 A CN 201510790497A CN 105242221 A CN105242221 A CN 105242221A
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- circuit
- feedback type
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- locomotive power
- direct current
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Abstract
The present invention discloses a DC feedback type DC electronic load for locomotive power supply tests. The DC feedback type DC electronic load comprises a main circuit and a control circuit, wherein the main circuit is cascaded by a boost chopping circuit and a phase-shifted full-bridge circuit; and the control circuit is composed of a digital signal processing unit DSP and a logic control unit CPLD, is connected with an upper computer through a CAN communication circuit, is connected with a contactor control coil and an auxiliary coil through a switching signal processing circuit, is connected with voltage and current sensors through an analog signal processing circuit, controls the on-off of an IGBT in the main circuit through an IGBT driving module, and achieves the required load simulation and energy feedback functions. The DC feedback type DC electronic load allows tested energy to be recycled, saves a series of conversion links such as rectification and inversion when compared with a method of feeding the energy back to an AC power grid, makes the control method simpler, and reduces cost.
Description
[technical field]
The present invention relates to electrical locomotive power technical field of measurement and test, particularly a kind of electrical locomotive power test direct current feedback type DC Electronic Loads.
[background technology]
The electrical locomotive power load for testing of existing maturation mainly contains two classes:
Energy consumption type: the connection in series-parallel primarily of high-power resistance, electric capacity, inductance forms, by on-off circuit control its connected mode realize electrical locomotive power dispatch from the factory before every test; Or the band of being simulated the power supply that dispatches from the factory by Power Electronic Circuit carries characteristic, is finally discharged by resistance heating by test energy.The energy of test all consumes by this type of load, and produces a large amount of heat energy in the process of power consumption, adds heat radiation difficulty and brings potential safety hazard.
Feedback type: form primarily of Power Electronic Circuit, carries characteristic by the band opened, turn off simulation electrical locomotive power controlling semiconductor switch pipe, and by the energy feedback in test in electrical network.Although this type of load serves energy-conservation effect, in the process of power supply test, electric energy through multiple transform part such as inversion grid connection, rectification, will not only reduce efficiency, adds loss, also can bring harmonic pollution to electrical network.
[summary of the invention]
In view of this, for overcoming the deficiencies in the prior art, the invention provides a kind of electrical locomotive power test direct current feedback type DC Electronic Loads, compared to by energy feedback to AC network, eliminate a series of link such as rectification, inversion, make that control mode becomes simply, cost reduces.
For achieving the above object, technical scheme of the present invention is as follows:
Electrical locomotive power test direct current feedback type DC Electronic Loads, comprise main circuit and control circuit forms, described main circuit is made up of boost chopper and phase whole-bridging circuit cascade, described control circuit comprises digital signal processing unit DSP andlogic control unit CPLD, also comprises the human-computer interaction interface be made up of host computer and programmable logic controller (PLC) PLC.
Described digital signal processing unit DSP is connected with host computer by CAN communication circuit, be connected with contactor control coil and ancillary coil by switching signal processing circuit, be connected with voltage, current sensor by analog signal processing circuit, described logic control element CPLD is connected with IGBT drive module, and described IGBT drive module connects described boost chopper and phase whole-bridging circuit respectively by circuit again.
Further, described phase whole-bridging circuit input side is connected with boost chopper outgoing side.
Described phase whole-bridging circuit output terminal is connected with DC600V powering shelf by exporting main contactor and exporting pre-charge contactor, makes test energy directly feed back to tested direct supply direct current input side, reduces unnecessary intermediate link, improve capacity usage ratio.
Electric capacity is connected in parallel between described boost chopper and phase whole-bridging circuit.
Further; described voltage, current sensor are connected with hardware protection circuit; described hardware protection circuit connects described logic control element CPLD again; guard signal is directly given to logic control element CPLD; by the being swift in motion property of logic control element CPLD; make protection act only need the time of tens nanoseconds, be enough to guard period and do not damage in the moment of overvoltage, overcurrent.
Described human-computer interaction interface comprises host computer and programmable logic controller (PLC) PLC, for the setting of different test case, data display and the operation of each switch provide conveniently.
Described programmable logic controller (PLC) PLC is connected by level shifting circuit andlogic control unit CPLD.
The invention has the beneficial effects as follows, compared to by energy feedback to AC network, eliminate a series of transform part such as rectification, inversion, make control mode become simple, effectively prevent loss and harmonic wave that electric energy repeatedly brings in conversion process.
[accompanying drawing explanation]
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is electrical block diagram of the present invention.
In figure, 1, DC600V powering shelf, 2, tested direct supply, 3, simulation load box, 4, programmable logic controller (PLC), 5, host computer, 6, input pre-charge contactor, 7, input main contactor, 8, contactor control coil, ancillary coil, 9, switching signal processing circuit, 10, CAN communication circuit, 11, voltage, current sensor, 12, analog signal processing circuit, 13, boost chopper, 14, digital signal processing unit, 15, hardware protection circuit, 16, logic control element, 17, export pre-charge contactor, 18, export main contactor, 19, phase whole-bridging circuit, 20, IGBT drive module, 21, level shifting circuit.
[embodiment]
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1, electrical locomotive power test direct current feedback type DC Electronic Loads, comprises main circuit and control circuit forms, and described main circuit is made up of boost chopper 13 and phase whole-bridging circuit 19 cascade.
Described control circuit comprises digital signal processing unit 14 andlogic control unit 16 and forms, and also comprises the human-computer interaction interface be made up of host computer 5 and programmable logic controller (PLC) 4.
Digital signal processing unit 14 is connected with host computer 5 by CAN communication circuit 10, be connected with contactor control coil, ancillary coil 8 by switching signal processing circuit 9, be connected with voltage, current sensor 11 by analog signal processing circuit 12, control the opening of IGBT in main circuit by IGBT drive module 20, turn off, the fictitious load needed for realization and the function of energy feedback.
Phase whole-bridging circuit 19 input side is connected with boost chopper 13 outgoing side, with output pre-charge contactor 17, phase whole-bridging circuit 19 is connected by exporting main contactor 18 with DC600V powering shelf 1, its characteristic is, test energy is directly fed back to tested direct supply 2 direct current input side, recycle for tested direct supply 2.
Control circuit is made up of for core digital signal processing unit 14 and logic control element 16, is connected with host computer 5 by CAN communication circuit 10, and its characteristic is, by host computer operating system state and display system data.
Be connected with voltage, current sensor with contactor control coil, ancillary coil respectively with analog signal processing circuit 12 by switching signal processing circuit 9, control the state detecting main circuit.Described voltage, current sensor 11 are connected with hardware protection circuit 15, guard signal are sent to logic control element 16, and programmable logic controller (PLC) 4 is connected by level shifting circuit 21 andlogic control unit 16.
Phase whole-bridging circuit 19 output terminal is directly connected with DC600V powering shelf 1 output terminal.
Host computer 5 is connected with digital signal processing unit 14 by CAN communication circuit 10.
Voltage, current sensor 11 are connected with hardware protection circuit 15, and guard signal is directly given to logic control element 16.
Described hardware protection circuit 15 connects described logic control element 16 again; guard signal is directly given to logic control element 16; by the being swift in motion property of logic control element 16, make protection act only need the time of tens nanoseconds, be enough to guard period and do not damage in the moment of overvoltage, overcurrent.
Described human-computer interaction interface comprises host computer 5 and programmable logic controller (PLC) 4, for the setting of different test case, data display and the operation of each switch provide conveniently.
The initial conditions that the present invention be directed to locomotive power source designs, and carries characteristic by the band of boost chopper 13 simulation test power supply, then will test energy feedback to direct current input side by phase whole-bridging circuit 19, and the energy of test is recycled.Compared to by energy feedback to AC network, eliminate a series of transform part such as rectification, inversion, even if control mode becomes simply, cost reduces, the loss that electric energy can be avoided again repeatedly to bring in conversion process and harmonic wave.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. electrical locomotive power test direct current feedback type DC Electronic Loads, comprise main circuit and control circuit forms, it is characterized in that, described main circuit is made up of boost chopper and phase whole-bridging circuit cascade, described control circuit comprises digital signal processing unit DSP andlogic control unit CPLD, also comprises the human-computer interaction interface be made up of host computer and programmable logic controller (PLC) PLC;
Described digital signal processing unit DSP is connected with host computer by CAN communication circuit, be connected with contactor control coil and ancillary coil by switching signal processing circuit, be connected with voltage, current sensor by analog signal processing circuit, described logic control element CPLD is connected with IGBT drive module, and described IGBT drive module connects described boost chopper and phase whole-bridging circuit respectively by circuit again.
2. electrical locomotive power test direct current feedback type DC Electronic Loads according to claim 1, it is characterized in that, described phase whole-bridging circuit input side is connected with boost chopper outgoing side.
3. electrical locomotive power test direct current feedback type DC Electronic Loads according to claim 1 and 2, is characterized in that, described phase whole-bridging circuit output terminal is connected with DC600V powering shelf by exporting main contactor and exporting pre-charge contactor.
4. electrical locomotive power test direct current feedback type DC Electronic Loads according to claim 1, is characterized in that, be connected in parallel electric capacity between described boost chopper and phase whole-bridging circuit.
5. electrical locomotive power test direct current feedback type DC Electronic Loads according to claim 1, it is characterized in that, described voltage, current sensor are connected with hardware protection circuit, and described hardware protection circuit connects described logic control element CPLD again.
6. electrical locomotive power test direct current feedback type DC Electronic Loads according to claim 1, is characterized in that, described programmable logic controller (PLC) PLC is connected by level shifting circuit andlogic control unit CPLD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790497.6A CN105242221A (en) | 2015-11-17 | 2015-11-17 | DC feedback type DC electronic load for locomotive power supply test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790497.6A CN105242221A (en) | 2015-11-17 | 2015-11-17 | DC feedback type DC electronic load for locomotive power supply test |
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| Publication Number | Publication Date |
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| CN105242221A true CN105242221A (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510790497.6A Pending CN105242221A (en) | 2015-11-17 | 2015-11-17 | DC feedback type DC electronic load for locomotive power supply test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291012A (en) * | 2016-08-26 | 2017-01-04 | 深圳市伊力科电源有限公司 | Programmable DC power supply realizes system and method |
| CN106597105A (en) * | 2017-01-03 | 2017-04-26 | 西南交通大学 | Equivalent locomotive-traction network coupling test platform and test method thereof |
| CN110912429A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Synchronous rectification control method and device of phase-shifted full-bridge/push-pull bidirectional converter |
| CN111175668A (en) * | 2019-12-23 | 2020-05-19 | 贵州航天计量测试技术研究所 | Switching device for connecting power module test system with test tool |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291012A (en) * | 2016-08-26 | 2017-01-04 | 深圳市伊力科电源有限公司 | Programmable DC power supply realizes system and method |
| CN106597105A (en) * | 2017-01-03 | 2017-04-26 | 西南交通大学 | Equivalent locomotive-traction network coupling test platform and test method thereof |
| CN106597105B (en) * | 2017-01-03 | 2019-01-08 | 西南交通大学 | Equivalent locomotive-Traction networks coupling experiment platform and its test method |
| CN110912429A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Synchronous rectification control method and device of phase-shifted full-bridge/push-pull bidirectional converter |
| CN111175668A (en) * | 2019-12-23 | 2020-05-19 | 贵州航天计量测试技术研究所 | Switching device for connecting power module test system with test tool |
| CN111175668B (en) * | 2019-12-23 | 2022-08-23 | 贵州航天计量测试技术研究所 | Switching device for connecting power module test system with test tool |
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Application publication date: 20160113 |