CN100557976C

CN100557976C - Adopt the ac power electronic switch of double mcu to trigger the state sample circuit

Info

Publication number: CN100557976C
Application number: CN 200810102385
Authority: CN
Inventors: 张念鲁; 李秉泉; 张春柏; 王红
Original assignee: College of Biochemical Engineering of Beijing Union University
Current assignee: College of Biochemical Engineering of Beijing Union University
Priority date: 2008-03-21
Filing date: 2008-03-21
Publication date: 2009-11-04
Anticipated expiration: 2028-03-21
Also published as: CN101247117A

Abstract

The present invention is that a kind of ac power electronic switch of double mcu that adopts triggers the state sample circuit, belongs to field of power electronics.Comprise major loop and control loop, major loop includes circuit breaker, fast acting fuse, controllable silicon, load, and described control loop circuit includes the control Driver Circuit of zero cross detection circuit, first single-chip microcomputer, second singlechip, display circuit, buzzing prompting etc.First single-chip microcomputer is that serial communication is connected with second singlechip.The control triggering electric circuit of controllable silicon and load, display circuit and zero cross detection circuit link to each other with first single-chip microcomputer, and the control Driver Circuit of buzzing prompting, keyboard state testing circuit, triggering state detection circuit link to each other with second singlechip.The input of triggering state sample circuit links to each other with control triggering electric circuit, and output links to each other with the triggering state detection circuit.The invention has the advantages that the primary side that the state of triggering sample circuit has been placed on pulse transformer, the scope of monitoring circuits for triggering has obtained expansion.

Description

Adopt the ac power electronic switch of double mcu to trigger the state sample circuit

Technical field

The present invention is that a kind of ac power electronic switch of double mcu that adopts triggers the state sample circuit, belongs to field of power electronics, can be used for controlling equipment such as motor, power regulating eqiupment.

Background technology

Adopt the ac power electronic switch of single-chip microcomputer at present, a single-chip microcomputer is all adopted in its control core, in case itself breaks down single-chip microcomputer, the whole ac power electronic switch state that will paralyse, can not report to the police, show, can not take measures, if this ac power electronic switch uses in key, hazardous environment, its consequence will be very serious; If take measures for this situation, its cost can be very high.This is the problem that its control section of present ac power electronic switch adopts a single-chip microcomputer to exist.Adopt the ac power electronic switch of two single-chip microcomputers, as Chinese patent 200620119430.6, it triggers the input that the state sampling point is taken from drive circuit in the control triggering electric circuit, the monitored scope of The whole control circuits for triggering is less, all not in monitoring range, this is its weak point for drive circuit itself and pulse transformer primary side.For improving the intelligent of ac power electronic switch control section, it is necessary enlarging the observation circuit scope, and this to be operated in the present practical application be incomplete.

Summary of the invention

The objective of the invention is to improve the intelligent of electronic power switch integral body, enlarge the scope of observation circuit, in time the state of the inner key point of Monitoring and Controlling circuit is avoided the extension of accident.

To achieve these goals, the present invention has taked following technical scheme.Comprise major loop and control loop, described major loop includes circuit breaker, fast acting fuse, controllable silicon, load, and described control loop circuit includes control triggering electric circuit, keyboard state testing circuit, triggering state detection circuit and the over-voltage and over-current undervoltage detection circuit of control Driver Circuit, controllable silicon and the load of zero cross detection circuit, first single-chip microcomputer, second singlechip, display circuit, buzzing prompting; First single-chip microcomputer is that serial communication is connected with second singlechip; The control triggering electric circuit of controllable silicon and load, display circuit and zero cross detection circuit link to each other with first single-chip microcomputer, and the control Driver Circuit of buzzing prompting, keyboard state testing circuit, triggering state detection circuit and over-voltage and over-current undervoltage detection circuit link to each other with second singlechip; It is characterized in that: also include triggering state sample circuit, the input that triggers the state sample circuit links to each other with control triggering electric circuit, and output links to each other with the triggering state detection circuit.

Described triggering state sample circuit includes photoelectrical coupler, first resistance R 1 and second resistance R 2; Wherein, one end connection+5V power supply of first resistance R 1, the other end of first resistance R 1 connects the collector terminal of triode in the photoelectrical coupler, the ground of the emitter terminal connection+5V power supply of triode in the photoelectrical coupler, one end of second resistance R 2 connects an end that is connected with the triggering positive source of pulse transformer primary side, the other end of second resistance R 2 connects the anode of diode in the photoelectrical coupler, the negative electrode of diode connects an end that is connected with the drive circuit output of pulse transformer primary side in the photoelectrical coupler, and the sampling point that triggers the state sample circuit is the collector terminal of triode in the photoelectrical coupler.

Triggering state sample circuit among the present invention has adopted photoelectrical coupler and resistance, not only can monitor drive circuit itself and pulse transformer primary side, and has simplified the structure of sample circuit, has improved the anti-interference of sample circuit.

Description of drawings

Fig. 1 main loop circuit block diagram

Fig. 2 control loop circuit block diagram

Fig. 3 triggers the state detection circuit block diagram

Fig. 4 triggers the state detection circuit schematic diagram

Fig. 5 triggers and sample circuit figure

Fig. 6 main loop circuit figure

Fig. 7 control loop circuit theory diagrams

Embodiment

The present invention is described in detail below in conjunction with accompanying drawing 1～7.

As shown in Figure 1 and Figure 2, present embodiment includes major loop and control loop.Major loop includes circuit breaker, fast acting fuse, controllable silicon, load.The control loop circuit includes control triggering electric circuit, triggering state sample circuit, keyboard state testing circuit, triggering state detection circuit and the over-voltage and over-current undervoltage detection circuit of control Driver Circuit, controllable silicon and the load of zero cross detection circuit, first single-chip microcomputer, second singlechip, display circuit, buzzing prompting and forms.First single-chip microcomputer is that serial communication is connected with second singlechip.Zero cross detection circuit connects first single-chip microcomputer, first single-chip microcomputer connects the control triggering electric circuit and the display circuit of controllable silicon and load, triggering state sample circuit is connected with control triggering electric circuit, and second singlechip connects control Driver Circuit, keyboard state testing circuit, triggering state detection circuit and the over-voltage and over-current undervoltage detection circuit of buzzing prompting.

Triggering state sample circuit adopts photoelectrical coupler and first resistance 1, second resistance R 2 to connect and compose by corresponding, and is connected with control triggering electric circuit, and the triggering state in its acquisition controlling circuits for triggering provides input signal for triggering state detection circuit.Specifically be connected to: an end connection+5V power supply of first resistance R 1, first resistance R, 1 other end connects the collector terminal of triode in the photoelectrical coupler, the ground of the emitter terminal connection+5V power supply of triode in the photoelectrical coupler, second resistance R, 2 one ends connect an end (this end is connected with the triggering positive source) of pulse transformer primary side, second resistance R, 2 other ends connect the anode of diode in the photoelectrical coupler, the negative electrode of diode connects the other end (this end is connected with the drive circuit output) of pulse transformer primary side in the photoelectrical coupler, and the sampling point of this triggering state sample circuit is the collector terminal of triode in the photoelectrical coupler.

In Fig. 1, circuit breaker is used to cut off the electricity supply and being connected of fast acting fuse, controllable silicon and load, and fast acting fuse is used to protect controllable silicon, and controllable silicon is used for the power supply of break-make load.Take out every phase voltage signal from the controllable silicon two ends and deliver to the zero cross detection circuit of control section, see Fig. 2.Fig. 2 is the control loop circuit block diagram, and two single-chip microcomputers all adopt MCS-51 series 89C52 type (including the 8K flash memory), adopt serial port to communicate contact, exchange message between the two.Control command is imported from keyboard, and on display circuit the running status of display circuit.Overvoltage, overcurrent and undervoltage detection circuit are that whether monitoring electric power system voltage is normal, whether load has the overload phenomenon, in order to avoid damage Circuits System and equipment.After Fig. 2 Circuits System is received work order by keyboard, second singlechip 89C52-2 passes to the first single-chip microcomputer 89C52-1 by serial communication with order, 89C52-1 detects the zero cross fired point of main circuit thyristor by zero cross detection circuit, send trigger command by control triggering electric circuit to controllable silicon then, the controllable silicon conducting, load is started working; The buzzing cue circuit sends normal buzzing prompting by designing requirement.When the undesired or some single-chip microcomputers of certain test point work break down cisco unity malfunction in the Circuits System, Circuits System will be controlled buzzer by controlling and driving and produce buzzing, or show malfunction by display circuit, remind the user.

The triggering state detection circuit is whether the state of detection control triggering electric circuit control output is correct, if incorrect, 89C52-2 will notify 89C52-1 to forbid control triggering electric circuit work, guarantee whole system safety.Trigger the state detection circuit block diagram as shown in Figure 3.This circuit utilizes multiway analog switch CD4051 that the sampled point Y1～Y6 in the sample circuit (0 and 1 state, Transistor-Transistor Logic level) is sent into single-chip microcomputer 89C52-2.Concrete triggering state detection circuit as shown in Figure 4.

As shown in Figure 5, trigger the state sample circuit and connected and composed by photoelectrical coupler TIL1～TIL6,10K

Ω resistance R

1 and 2K Ω resistance R 2, concrete sampled point is Y1～Y6.When 89C52-1 sends a certain road of triggering controllable silicon signal, the triode meeting conducting in the sample circuit in the corresponding photoelectrical coupler, the some output states among corresponding Y1～Y6 can be in low level (or 0 level); When 89C52-1 does not send any triggering controllable silicon signal, all not conductings of triode in TIL1～TIL6 photoelectrical coupler, Y1-Y6 all is in high level state (or 1 level state); Whether 89C52-2 obtains a certain road signal condition among Y1～Y6 by control chip CD4051, judges corresponding high-low level among Y1～Y6 then, confirm to have with this and trigger the silicon controlled signal and exist, and it triggers silicon controlled rule and whether order is correct.

Main loop circuit figure as shown in Figure 6.The control loop circuit theory diagrams as shown in Figure 7.

Present embodiment not only can monitor drive circuit itself, can also detect the pulse transformer primary side, has reached purpose of the present invention.

Claims

1, a kind of ac power electronic switch of double mcu that adopts triggers the state sample circuit, comprise major loop and control loop, described major loop includes circuit breaker, fast acting fuse, controllable silicon, load, and described control loop circuit includes control triggering electric circuit, keyboard state testing circuit, triggering state detection circuit and the over-voltage and over-current undervoltage detection circuit of control Driver Circuit, controllable silicon and the load of zero cross detection circuit, first single-chip microcomputer, second singlechip, display circuit, buzzing prompting; First single-chip microcomputer is that serial communication is connected with second singlechip; The control triggering electric circuit of controllable silicon and load, display circuit and zero cross detection circuit link to each other with first single-chip microcomputer, and the control Driver Circuit of buzzing prompting, keyboard state testing circuit, triggering state detection circuit and over-voltage and over-current undervoltage detection circuit link to each other with second singlechip; It is characterized in that: also include triggering state sample circuit, the input that triggers the state sample circuit links to each other with control triggering electric circuit, and output links to each other with the triggering state detection circuit;

Described triggering state sample circuit includes photoelectrical coupler, first resistance (R1) and second resistance (R2); Wherein, one end connection+5V power supply of first resistance (R1), the other end of first resistance (R1) connects the collector terminal of triode in the photoelectrical coupler, the ground of the emitter terminal connection+5V power supply of triode in the photoelectrical coupler, one end of second resistance (R2) connects an end that is connected with the triggering positive source of pulse transformer primary side, the other end of second resistance (R2) connects the anode of diode in the photoelectrical coupler, the negative electrode of diode connects an end that is connected with the drive circuit output of pulse transformer primary side in the photoelectrical coupler, and the sampling point that triggers the state sample circuit is the collector terminal of triode in the photoelectrical coupler.