CN103762714A - Switching device for achieving switching control over multiple power systems - Google Patents
Switching device for achieving switching control over multiple power systems Download PDFInfo
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- CN103762714A CN103762714A CN201410014795.1A CN201410014795A CN103762714A CN 103762714 A CN103762714 A CN 103762714A CN 201410014795 A CN201410014795 A CN 201410014795A CN 103762714 A CN103762714 A CN 103762714A
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Abstract
The invention discloses a switching device for achieving switching control over multiple power systems. The switching device comprises a cabinet body and a cabinet door, the cabinet body and the cabinet door are connected, a driving plate, a current sensor and a plurality of bidirectional controlled silicon static switches are arranged in the cabinet body, the current sensor is used for detecting an output current, and each bidirectional controlled silicon static switch is connected into a power supply circuit of a corresponding power source. A master controller is arranged on the cabinet door and drives the corresponding bidirectional controlled silicon static switches to perform corresponding motions through the driving plate according to voltage signals and output current signals of each power source. By means of the technical scheme, ring currents caused by moment outage and arc discharging when a mechanical switch or a relay is switched are overcome, and therefore it is guaranteed that the switching break period is in the millisecond stage.
Description
Technical field
The present invention relates to power control technology field, relate in particular to a kind of for realizing the switching device of a plurality of power-supply system switching controls.
Background technology
In current mains supply system, electrical network is because of reasons such as the switching of large-scale power supply unit, thunder and lightning weather, load faulties, cause supply power voltage moment to fall or power-off, thereby cause sensitive loads system (computer terminal, data processor equipment, do not allow power-off load) power-off, can cause so even casualties of device damage, loss of data.Therefore, for power supply, there is the industry of specific (special) requirements often all to dispose the power supply that supplies power with double circuit, when main power source breaks down or is abnormal, need to be Microsecond grade direct safe and reliable being switched in another road electric power system in the time.Current known two-way automatic power switch is to using mechanical switch or relay as switch, switching time in the several seconds between tens of milliseconds.For the load that does not allow power-off, require 20 milliseconds even to need electrical source exchange in 4 milliseconds, therefore, traditional mechanical switch or relay cannot meet the requirement of sensitive loads system to electrical source exchange speed.And traditional mechanical type can produce arcing in handoff procedure, the circulation causing because of arcing easily causes second short circuit.
Summary of the invention
The technical problem to be solved in the present invention is, for the slow defect of the above-mentioned switch speed of prior art, provides a kind of for realizing the switching device of a plurality of power-supply system switching controls, and switch speed is fast.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of for realizing the switching device of a plurality of power-supply system switching controls, comprise the cabinet and the cabinet door that are connected, in described cabinet, be provided with drive plate, for detection of current sensor and a plurality of two-direction silicon controlled static switch of output current, and each two-direction silicon controlled static switch is connected in the supply line of corresponding power supply; On described cabinet door, be provided with master controller, and described master controller drives corresponding two-direction silicon controlled static switch to carry out corresponding actions according to the voltage signal of each power supply and output current signal by described drive plate.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, described cabinet door comprises outer cabinet door and inner cabinet door, and, described master controller is arranged on outer cabinet door, on described inner cabinet door, be provided with output switch and the input switch corresponding with each power supply, the bottom of described cabinet is also provided with the input port of output port and each power supply, and the input port of described each power supply connects described output port by its corresponding input switch, two-direction silicon controlled static switch and described output switch.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, on described inner cabinet door, be also provided with the by-pass switch corresponding with each power supply, and the input port of described each power supply connects described output port by its corresponding by-pass switch.
For realizing the switching device of a plurality of power-supply system switching controls, described switching device also comprises the radiator being arranged in cabinet of the present invention, and described a plurality of two-direction silicon controlled static switch is arranged on described radiator.
Of the present invention, for realizing the switching device of a plurality of power-supply system switching controls, described master controller comprises:
For the voltage signal/output current signal of each power supply is sampled and it is carried out to the testing circuit of zero passage detection;
Be connected in described testing circuit, and for according to sampled voltage/current signals and the zero crossing output control signal detecting and with the dsp processor of the corresponding pwm pulse signal of corresponding power supply;
Be connected in described dsp processor, and for produce the interlocking control circuit of the enable signal of a plurality of interlockings according to described control signal; And
Be connected in described dsp processor and described interlocking control circuit, and for respectively corresponding pwm pulse signal being carried out a plurality of buffering control chips of Hyblid Buffer Amplifier processing according to described a plurality of enable signals.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, described testing circuit comprises: the first amplifier, the first resistance, the second resistance, the second amplifier, the 3rd resistance, optocoupler, the 4th resistance, the first inverter and clamper, wherein, the inverting input of described the first amplifier connects the live wire of voltage/current signals, the in-phase input end of described the first amplifier connects the zero line of voltage/current signals, the in-phase input end of described the first amplifier also connects 1.5V voltage by described the first resistance, the output of described the first amplifier is the sampling end of voltage/current signals, and described sampling end also connects clamper, described the second resistance is connected between the output and inverting input of described the first amplifier, the in-phase input end of described the second amplifier connects the output of described the first amplifier, the inverting input of described the second amplifier connects 1.5V voltage by described the 3rd resistance, the negative input end of optocoupler described in the output termination of described the second amplifier, the positive input termination 3.3V voltage of described optocoupler, the negative output terminal ground connection of described optocoupler, the input of the first inverter described in the positive output termination of described optocoupler, the positive output end of described optocoupler also connects 3.3V voltage by described the 4th resistance, the output of described the first inverter is zero passage detection output.
Of the present invention, for realizing the switching device of a plurality of power-supply system switching controls, described a plurality of power supplys comprise main power source and stand-by power supply;
Described interlocking control circuit comprises: the second inverter, the first triode, the second triode, the 5th resistance, the 6th resistance, wherein, the base stage of the input of described the second inverter and described the first triode connects respectively the control signal output of described dsp processor, the output of described the second inverter connects the base stage of described the second triode, the emitter of the emitter of described the first triode and described the second triode is ground connection respectively, the collector electrode of described the first triode connects 5V voltage by described the 5th resistance, the collector electrode of described the second triode connects 5V voltage by described the 6th resistance, the collector electrode of described the first triode also connects the gating end of one of them buffering control chip, the collector electrode of described the second triode also connects the gating end of another buffering control chip, the input of described two buffering control chips is inputted respectively the pwm pulse signal of corresponding power supply.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, described interlocking control circuit also comprises the 3rd triode, the base stage of described the 3rd triode connects the output of described the second inverter, the grounded emitter of described the 3rd triode, the collector electrode of described the 3rd triode connects the base stage of described the first triode.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, described drive plate comprises the driver element corresponding with each road pwm pulse signal, described driver element comprises the 7th resistance, the 8th resistance, the 4th triode, the 5th triode, the 6th triode, electric capacity, isolating transformer, the first filter circuit and the second filter circuit, wherein, the base stage of the 4th triode accesses corresponding pwm pulse signal, the grounded emitter of described the 4th triode, the collector electrode of described the 4th triode connects the collector electrode of described the 6th triode by described the 7th resistance, the base stage of the base stage of described the 6th triode and described the 5th triode connects the collector electrode of described the 4th triode in the lump, the emitter of described the 6th triode connects the first end of described electric capacity and the emitter of described the 5th triode by described the 8th resistance, the grounded collector of described the 5th triode, the second end of described electric capacity connects the first end of the former limit winding of described isolating transformer, the second end ground connection of the former limit winding of described isolating transformer, the two ends of the first secondary winding of described isolating transformer connect respectively two inputs of described the first filter circuit, first of the corresponding two-direction silicon controlled static switch of positive output termination of described the first filter circuit is controlled the utmost point, the first negative electrode of the corresponding two-direction silicon controlled static switch of negative output termination of described the first filter circuit, the two ends of the second secondary winding of described isolating transformer connect respectively two inputs of described the second filter circuit, second of the corresponding two-direction silicon controlled static switch of positive output termination of described the second filter circuit is controlled the utmost point, the second negative electrode of the corresponding two-direction silicon controlled static switch of negative output termination of described the second filter circuit.
Of the present invention for realizing the switching device of a plurality of power-supply system switching controls, described filter circuit comprises diode, the 9th resistance, the tenth resistance and voltage stabilizing didoe, wherein, the positive pole of described diode connects the first end of the corresponding secondary of described isolating transformer, the negative pole of described diode connects the second end of the corresponding secondary of described isolating transformer by the 9th resistance and the tenth resistance, the negative pole of described voltage stabilizing didoe connects the tie point of the 9th resistance and the tenth resistance, the positive pole of described voltage stabilizing didoe connects the second end of the corresponding secondary of described isolating transformer.
Implement technical scheme of the present invention, when Yi road power supply breaks down, this switching device can be realized Cong Yi road power supply to the switching between another road power supply, and, owing to using two-direction silicon controlled static switch, so, when switching, can not produce impulse current, thereby the switching between power supply can be completed in 4ms, ensure the power supply reliably continuously of sensitive loads system.So, the circulation having caused because of instant cut-off and arcing when switching device of the present invention has overcome mechanical switch or relay switch, thus guarantee that HO-break duration is Millisecond.
And when switching device needs maintenance, test, can make corresponding power supply by manual unlocking by-pass switch is load supplying.
In addition, this switching device adopts integrated design, master controller is arranged on outer cabinet door, and various switches are arranged on inner cabinet door, presents front and rear row layout, compact conformation, strong and weak electricity are independently separately, can overcome traditional switch device wiring trouble, control complicated and shortcoming difficult in maintenance, and master controller is independently arranged on cabinet door, increase anti-interference, make system more reliable and more stable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the present invention for realizing the structural representation of outer cabinet door embodiment mono-of the switching device of double power-supply system switching controls;
Fig. 2 is the present invention for realizing the structural representation of inner cabinet door embodiment mono-of the switching device of double power-supply system switching controls;
Fig. 3 is the present invention for realizing the structural representation of cabinet embodiment mono-of the switching device of double power-supply system switching controls;
Fig. 4 is the building-block of logic of master controller embodiment mono-in Fig. 1;
Fig. 5 is the circuit diagram of testing circuit preferred embodiment in Fig. 4;
Fig. 6 is the circuit diagram of interlocking control circuit preferred embodiment in Fig. 4;
Fig. 7 is the circuit diagram that cushions control chip U30, U31 preferred embodiment in Fig. 4;
Fig. 8 is the circuit diagram of a driver element preferred embodiment of drive plate in Fig. 3.
Embodiment
First explanation is, all embodiment of the present invention all be take the duplicate supply of three-phase and are described as example, these two power supplys are respectively main power source and stand-by power supply, should understand, when the quantity of power supply is greater than two, the structure of switching device that realizes a plurality of power-supply system switching controls is similar to it, repeats no more.
In conjunction with Fig. 1-3, should comprise cabinet 30 and the cabinet door being connected for realizing the switching device of double power-supply system switching controls, this cabinet door is two storied gate, comprise outer cabinet door 10 and inner cabinet door 20, and, on outer cabinet door 10, be provided with master controller 11, on inner cabinet door 20, be provided with the input switch 21 of main power source, the by-pass switch 24 of the input switch 22 of stand-by power supply, output switch 23, main power source and the by-pass switch 25 of stand-by power supply.In cabinet 30, be provided with drive plate 31, radiator 32 and current sensor (three-phase) 34, and, on radiator 32, be provided with six two-direction silicon controlled static switch 33(SCR1, SCR2, SCR3, SCR4, SCR5, SCR6), wherein, SCR1 is connected in the supply line of main power source A phase, SCR2 is connected in the supply line of stand-by power supply A phase, SCR3 is connected in the supply line of main power source B phase, SCR4 is connected in the supply line of stand-by power supply B phase, SCR5 is connected in the supply line of main power source C phase, SCR6 is connected in the supply line of stand-by power supply C phase.In addition, the bottom of cabinet is provided with the input port 35 of main power source, the input port 36 of stand-by power supply and output port 37, and, for main power source, its input port 35 is connected output port 37 by input switch 21, two-direction silicon controlled static switch (SCR1, SCR3, SCR5) with output switch 23, and its input port 35 also connects output port 37 by by-pass switch 24.For stand-by power supply, its input port 36 is connected output port 37 by input switch 22, two-direction silicon controlled static switch (SCR2, SCR4, SCR6) with output switch 23, and its input port 36 also connects output port 37 by by-pass switch 25.Single phase poaer supply forms six like this and enters three topological structures that go out, if can form two topological structures that enter singly to go out.
When this switching device work, current sensor 34 detects output current in real time, and master controller 11 drives corresponding two-direction silicon controlled static switch to carry out corresponding actions according to the voltage signal of each power supply and output current signal by drive plate 31.
Implement the technical scheme of this embodiment, when Yi road power supply breaks down, this switching device is realized Cong Yi road power supply to the switching between another road power supply, and, owing to using two-direction silicon controlled static switch, so, when switching, can not produce impulse current, thereby the switching between power supply can be completed in 4ms, ensure the power supply reliably continuously of sensitive loads system.When switching device needs maintenance, test, can make corresponding power supply by manual unlocking by-pass switch is load supplying.
In addition, this switching device adopts integrated design, master controller is arranged on outer cabinet door, and various switches are arranged on inner cabinet door, presents front and rear row layout, compact conformation, strong and weak electricity are independently separately, traditional switch device wiring trouble be can overcome, complicated and shortcoming difficult in maintenance controlled, and, on the independent cabinet door mounted externally of master controller, increase anti-interference, make system more reliable and more stable.
In conjunction with the master controller shown in Fig. 4, this master controller comprises testing circuit 111, dsp processor 112, interlocking control circuit 113 and two buffering control chip U30, U31.Wherein, testing circuit 111 is for sampling and it is carried out to zero passage detection the voltage signal/output current signal of each power supply; Dsp processor 112 for according to sampled voltage/current signals and the zero crossing output control signal detecting and with the corresponding pwm pulse signal of corresponding power supply; Interlocking control circuit 113 is for producing the enable signal of a plurality of interlockings according to control signal; Buffering control chip U30, U31 are for carrying out Hyblid Buffer Amplifier processing to corresponding pwm pulse signal respectively according to a plurality of enable signals.Finally, it should be noted that, about testing circuit 111, the electric current that its output current signal of sampling is exported from current sensor.And it is before the voltage signal of each power supply of sampling, first by divider resistance, the voltage of each power supply is carried out to step-down, and then send into testing circuit 111 and detect.
Fig. 5 is the circuit diagram of testing circuit preferred embodiment in Fig. 4, first it should be noted that, the testing circuit of this embodiment only shows a part, and this part is for detection of a phase voltage, should be understood that in this testing circuit and also comprise for detection of other phase voltage and the part that detects each phase current.Its circuit structure is similar with it, does not repeat.In this embodiment, the inverting input of amplifier U1B connects the live wire of voltage signal, the in-phase input end of amplifier U1B connects the zero line of voltage signal, and the in-phase input end of amplifier U1B also connects 1.5V voltage by resistance R 19, and capacitor C 2 is connected in parallel on the two ends of resistance R 19.Capacitor C 13 is connected between the inverting input and in-phase input end of amplifier U1B, resistance R 24 and capacitor C 25 are connected between the output and inverting input of amplifier U1B, the output of amplifier U1B meets clamper D16 by resistance R 39, this clamper D16 is comprised of antiparallel two diodes, be used for the output voltage clamper of amplifier U1B, below 3.3V, then the voltage after clamper being sent into dsp processor.The in-phase input end of amplifier U1A connects the output of amplifier U1B by resistance R 49, the inverting input of amplifier U1A connects 1.5V voltage by resistance R 50, the output of amplifier U1A connects the negative input end of optocoupler U7 by resistance R 55, the positive input termination 3.3V voltage of optocoupler U7, the negative output terminal ground connection of optocoupler U7, the input of the positive output termination inverter U10A of optocoupler U7, the positive output end of optocoupler U7 also connects 3.3V voltage by resistance R 58, the output of inverter U10A is zero passage detection output, and this zero passage detection signal is incorporated dsp processor.Finally it should be noted that, capacitor C 2, C13, C25 play voltage stabilizing or buffer action, can save in other embodiments.Resistance R 39, R49, R55 play metering function, can save in other embodiments.
In conjunction with Fig. 6 and Fig. 7, in this interlocking control circuit, the control signal output of dsp processor connects the input of inverter U10D and passes through the base stage of resistance R 4 connecting triode Q10, the output of inverter U10D is by the base stage of resistance R 7 connecting triode Q11, the output of inverter U10D is also by the base stage of resistance R 6 connecting triode Q9, the emitter of triode Q10, the emitter of the emitter of triode Q11 and triode Q9 is ground connection respectively, the collector electrode of triode Q10 connects 5V voltage by resistance R 10, the collector electrode of triode Q11 connects 5V voltage by resistance R 9, the base stage of the collector connecting transistor Q10 of triode Q9, resistance R 5 is connected between the base stage and emitter of triode Q10, resistance R 8 is connected between the base stage and emitter of triode Q11.The collector electrode of triode Q10 also connects the gating end of buffering control chip U30, the collector electrode of triode Q11 also connects the gating end of buffering control chip U31, three inputs of buffering control chip U30 are inputted respectively three-phase stand-by power supply San road pwm pulse signal (DriverIN2, DriverIN4, DriverIN6), Gai San road pwm pulse signal is after buffering control chip U30 processes, export three road pwm pulse signals (Driver2, Driver4, Driver6), the respective drive unit that San road pwm pulse signal is input to drive plate of exporting.Three inputs of buffering control chip U31 are inputted respectively three-phase main power source San road pwm pulse signal (DriverIN1, DriverIN3, DriverIN5), Gai San road pwm pulse signal is after buffering control chip U31 processes, export three road pwm pulse signals (Driver1, Driver3, Driver5), the respective drive unit that San road pwm pulse signal is input to drive plate of exporting.Finally it should be noted that, resistance R 4, R6, R7 play metering function, resistance R 5,, R8 plays buffer action, all can save in other embodiments, and triode Q9 also can save.
Drive plate comprises the driver element corresponding with each road pwm pulse signal, below in conjunction with Fig. 8 explanation driver element corresponding with pwm pulse signal Driver1, in this driver element, the base stage access pwm pulse signal Driver1 of triode Q2, the base stage of triode Q2 also connects 12V voltage by resistance R 15, the grounded emitter of triode Q2, capacitor C 7 is connected between the base stage and emitter of triode Q2, the collector electrode of triode Q2 connects collector electrode and the 12V voltage of triode Q7 by resistance R 9, the base stage of triode Q7 connects the collector electrode of triode Q2 by resistance R 17, the base stage of triode Q5 connects the collector electrode of triode Q2 by resistance R 19, the grounded collector of triode Q5, the emitter of triode Q5 connects the emitter of triode Q7 by resistance R 21, diode D1 and triode Q7 inverse parallel, diode D2 and triode Q5 inverse parallel.The emitter of the first end connecting triode Q5 of capacitor C 11, the second end of capacitor C 11 connects the first end of the former limit winding of isolating transformer T1, the second end ground connection of the former limit winding of isolating transformer T1, the positive pole of the first terminating diode D6 of the first secondary winding of isolating transformer T1, the negative pole of diode D6 connects the negative pole of voltage stabilizing didoe Z2 by resistance R 23, the positive pole of voltage stabilizing didoe Z2 connects the second end of the first secondary winding of isolating transformer T1, resistance R 26 is connected to the two ends of voltage stabilizing didoe Z2, diode D6, resistance R 23, resistance R 26 and voltage stabilizing didoe Z2 form the first filter circuit.And the negative pole of voltage stabilizing didoe Z2 connects first of two-direction silicon controlled static switch and controls the utmost point (G1), the positive pole of voltage stabilizing didoe Z2 connects first negative electrode (K1) of two-direction silicon controlled static switch.Similarly, the positive pole of the first terminating diode D5 of the second secondary winding of isolating transformer T1, the negative pole of diode D5 connects the negative pole of voltage stabilizing didoe Z1 by resistance R 22, the positive pole of voltage stabilizing didoe Z1 connects the second end of the second secondary winding of isolating transformer T1, resistance R 27 is connected to the two ends of voltage stabilizing didoe Z1, and diode D5, resistance R 25, resistance R 27 and voltage stabilizing didoe Z1 form the second filter circuit.And the negative pole of voltage stabilizing didoe Z1 connects second of two-direction silicon controlled static switch and controls the utmost point (G2), the positive pole of voltage stabilizing didoe Z1 connects second negative electrode (K2) of two-direction silicon controlled static switch.Finally it should be noted that, resistance R 17, R19, R15, capacitor C 7 and diode D1, D2, can save in other embodiments.
The following describes the operation principle of this switching device: first explanation is, dsp processor is exported 6 road pwm pulse signals, wherein, DriveIN1, DriveIN3, DriveIN5 send into buffering control chip U31, for driving the two-direction silicon controlled static switch of three-phase main power source; DriveIN2, DriveIN4, DriveIN6 send into buffering control chip U30, for driving the two-direction silicon controlled static switch of three-phase stand-by power supply.Buffering control chip U30, U31 all have two condition output, and this two condition output is controlled by its Enable Pin (OE), if Enable Pin is low level, opens output; If Enable Pin is high level, close output.
Master controller is also according to sampled voltage/current signals and the zero crossing output control signal (DRV-EN) that detects.When this control signal is high level, triode Q10 conducting, simultaneously, triode Q11 cut-off, and then, control chip U30 is because its Enable Pin is that low level is opened output for buffering, makes pwm pulse signal Drive2, Drive4, Drive6 send into the respective drive unit of drive plate, for example, by the communication modes of RS485, send into the respective drive unit of drive plate.When this control signal is low level, triode Q11 conducting after anti-phase after inverter U10D, simultaneously, triode Q10 cut-off, and then, buffering control chip U31, because its Enable Pin is that low level is opened output, makes pwm pulse signal Drive1, Drive3, Drive5 send into the respective drive unit of drive plate.The input and output logical relation of interlocking control circuit is as shown in the table:
When pwm pulse signal is sent to behind the respective drive unit of drive plate, take pwm pulse signal Driver1 as example, when low level, triode Q7 conducting; When high level, triode Q5 conducting, thus make resistance R 21, capacitor C 11 produce self-oscillation, isolating transformer T1 transfers energy to secondary, and after filter circuit filtering, drives the static switch action of corresponding bidirectional triode thyristor.
When this switching device work, first, current sensor detects in real time output current and testing result is transmitted to (for example, by the mode of RS485) to master controller.The testing circuit of master controller is to the voltage signal of each power supply and output current signal is sampled and it is carried out to zero crossing detection, for example, with a phase voltage signal, being sampled as example describes, the voltage of power supply is after divider resistance step-down, hot voltage after step-down is input to the inverting input of amplifier U1B, zero line voltage is input to the in-phase input end of amplifier U1B, because the voltage after step-down is also likely larger, so can zero line voltage be raised to 1.5V by resistance R 19.This amplifier U1B and resistance R 24 form dwindles circuit, and so that sampled voltage is dwindled to processing, the voltage after processing outputs to an input (ADC VB) of dsp processor after clamper D16.Meanwhile, the voltage dwindling after processing is input to inverter U10A after amplifier U1A, optocoupler U7, if sampled voltage at zero crossing, inverter U10A output low level, and be sent to another input (C_Zero) of dsp processor.Dsp processor is according to sampled voltage signal, current signal and the zero crossing output control signal that detects.For example, the main power source of judging current power supply when dsp processor breaks down, for example, while there is under-voltage, superpressure or overcurrent, its control signal output is exported high level, to drive the two-direction silicon controlled static switch work of stand-by power supply, simultaneously, make the two-direction silicon controlled static switch cut-off of main power source, thereby realize the switching from main power source to stand-by power supply, and, owing to having detected zero crossing, so switch in the time of can being chosen in zero crossing, can not produce circulation; When dsp processor, judging mains power failure disappears, its control signal output output low level, to drive the two-direction silicon controlled static switch work of main power source, simultaneously, make to drive the static cut-off of bidirectional triode thyristor of stand-by power supply, thereby realize the switching from stand-by power supply to main power source.
In addition, about master controller, it also has failure logging and good human-machine interface function.And, also there is independently accessory power supply (dual power supply) of two-way, when due to certain accidental cause Shi Yi road line under-voltage or power-off, another road power supply can provide stable power supply for master controller, improves system reliability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. one kind for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, comprise the cabinet and the cabinet door that are connected, in described cabinet, be provided with drive plate, for detection of current sensor and a plurality of two-direction silicon controlled static switch of output current, and each two-direction silicon controlled static switch is connected in the supply line of corresponding power supply; On described cabinet door, be provided with master controller, and described master controller drives corresponding two-direction silicon controlled static switch to carry out corresponding actions according to the voltage signal of each power supply and output current signal by described drive plate.
2. according to claim 1 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described cabinet door comprises outer cabinet door and inner cabinet door, and, described master controller is arranged on outer cabinet door, on described inner cabinet door, be provided with output switch and the input switch corresponding with each power supply, the bottom of described cabinet is also provided with the input port of output port and each power supply, and the input port of described each power supply connects described output port by its corresponding input switch, two-direction silicon controlled static switch and described output switch.
3. according to claim 2 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, on described inner cabinet door, be also provided with the by-pass switch corresponding with each power supply, and the input port of described each power supply connects described output port by its corresponding by-pass switch.
4. according to claim 1ly for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described switching device also comprises the radiator being arranged in cabinet, and described a plurality of two-direction silicon controlled static switch is arranged on described radiator.
5. according to claim 1ly for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described master controller comprises:
For the voltage signal/output current signal of each power supply is sampled and it is carried out to the testing circuit of zero passage detection;
Be connected in described testing circuit, and for according to sampled voltage/current signals and the zero crossing output control signal detecting and with the dsp processor of the corresponding pwm pulse signal of corresponding power supply;
Be connected in described dsp processor, and for produce the interlocking control circuit of the enable signal of a plurality of interlockings according to described control signal; And
Be connected in described dsp processor and described interlocking control circuit, and for respectively corresponding pwm pulse signal being carried out a plurality of buffering control chips of Hyblid Buffer Amplifier processing according to described a plurality of enable signals.
6. according to claim 5 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described testing circuit comprises: the first amplifier (U1B), the first resistance (R19), the second resistance (R24), the second amplifier (U1A), the 3rd resistance (R50), optocoupler (U7), the 4th resistance (R58), the first inverter (U10A) and clamper (D16), wherein, the inverting input of described the first amplifier (U1B) is for detecting positive input terminal, the in-phase input end of described the first amplifier (U1B) is for detecting negative input end, the in-phase input end of described the first amplifier (U1B) also connects 1.5V voltage by described the first resistance (R19), the sampling end that the output of described the first amplifier (U1B) is voltage/current signals, and described sampling end also connects clamper (D16), described the second resistance (R24) is connected between the output and inverting input of described the first amplifier (U1B), the in-phase input end of described the second amplifier (U1A) connects the output of described the first amplifier (U1B), the inverting input of described the second amplifier (U1A) connects 1.5V voltage by described the 3rd resistance (R50), the negative input end of optocoupler (U7) described in the output termination of described the second amplifier (U1A), the positive input termination 3.3V voltage of described optocoupler (U7), the negative output terminal ground connection of described optocoupler (U7), the input of the first inverter (U10A) described in the positive output termination of described optocoupler (U7), the positive output end of described optocoupler (U7) also connects 3.3V voltage by described the 4th resistance (R58), the output of described the first inverter (U10A) is zero passage detection output.
7. according to claim 6ly for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described a plurality of power supplys comprise main power source and stand-by power supply;
Described interlocking control circuit comprises: the second inverter (U10D), the first triode (Q10), the second triode (Q11), the 5th resistance (R10), the 6th resistance (R9), wherein, the base stage of the input of described the second inverter (U10D) and described the first triode (Q10) connects respectively the control signal output of described dsp processor, the output of described the second inverter (U10D) connects the base stage of described the second triode (Q11), the emitter of the emitter of described the first triode (Q10) and described the second triode (Q11) is ground connection respectively, the collector electrode of described the first triode (Q10) connects 5V voltage by described the 5th resistance (R10), the collector electrode of described the second triode (Q11) connects 5V voltage by described the 6th resistance (R9), the collector electrode of described the first triode (Q10) also connects the gating end of one of them buffering control chip, the collector electrode of described the second triode (Q11) also connects the gating end of another buffering control chip, the input of described two buffering control chips is inputted respectively the pwm pulse signal of corresponding power supply.
8. according to claim 7 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described interlocking control circuit also comprises the 3rd triode (Q9), the base stage of described the 3rd triode (Q9) connects the output of described the second inverter (U10D), the grounded emitter of described the 3rd triode (Q9), the collector electrode of described the 3rd triode (Q9) connects the base stage of described the first triode (Q10).
9. according to claim 8 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described drive plate comprises the driver element corresponding with each road pwm pulse signal, described driver element comprises the 7th resistance (R9), the 8th resistance (R21), the 4th triode (Q2), the 5th triode (Q5), the 6th triode (Q7), electric capacity (C11), isolating transformer (T1), the first filter circuit and the second filter circuit, wherein, the base stage of the 4th triode (Q2) accesses corresponding pwm pulse signal, the grounded emitter of described the 4th triode (Q2), the collector electrode of described the 4th triode (Q2) connects the collector electrode of described the 6th triode (Q7) by described the 7th resistance (R9), the base stage of the base stage of described the 6th triode (Q7) and described the 5th triode (Q5) connects the collector electrode of described the 4th triode (Q2) in the lump, the emitter of described the 6th triode (Q7) connects the first end of described electric capacity (C11) and the emitter of described the 5th triode (Q5) by described the 8th resistance (R21), the grounded collector of described the 5th triode (Q5), the second end of described electric capacity (C11) connects the first end of the former limit winding of described isolating transformer (T1), the second end ground connection of the former limit winding of described isolating transformer (T1), the two ends of the first secondary winding of described isolating transformer (T1) connect respectively two inputs of described the first filter circuit, first of the corresponding two-direction silicon controlled static switch of positive output termination of described the first filter circuit is controlled the utmost point, the first negative electrode of the corresponding two-direction silicon controlled static switch of negative output termination of described the first filter circuit, the two ends of the second secondary winding of described isolating transformer (T1) connect respectively two inputs of described the second filter circuit, second of the corresponding two-direction silicon controlled static switch of positive output termination of described the second filter circuit is controlled the utmost point, the second negative electrode of the corresponding two-direction silicon controlled static switch of negative output termination of described the second filter circuit.
10. according to claim 9 for realizing the switching device of a plurality of power-supply system switching controls, it is characterized in that, described the first filter circuit comprises diode (D6), the 9th resistance (R23), the tenth resistance (R26) and voltage stabilizing didoe (Z2), wherein, the positive pole of described diode (D6) connects the first end of the corresponding secondary of described isolating transformer (T1), the negative pole of described diode (D6) connects the second end of the corresponding secondary of described isolating transformer (T1) by the 9th resistance (R23) and the tenth resistance (R26), the negative pole of described voltage stabilizing didoe (Z2) connects the tie point of the 9th resistance (R23) and the tenth resistance (R26), the positive pole of described voltage stabilizing didoe (Z2) connects the second end of the corresponding secondary of described isolating transformer (T1).
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| CN103762714B (en) | 2018-03-13 |
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