CN103684415A

CN103684415A - Highly reliable inductive load driving technology for spacecraft

Info

Publication number: CN103684415A
Application number: CN201210326363.5A
Authority: CN
Inventors: 严丹; 丁承华
Original assignee: SHANGHAI AEROSPACE CONTROL ENGINEERING INSTITUTE
Current assignee: SHANGHAI AEROSPACE CONTROL ENGINEERING INSTITUTE
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2014-03-26

Abstract

The invention discloses a highly reliable inductive load driving technology for a spacecraft. The driving technology is characterized in that an OC gate composed of a first NMOS pipe, a second NMOS pipe, a third NMOS pipe and a fourth NMOS pipe, a fifth NMOS pipe and a sixth NMOS pipe are included; a first driving signal, a second driving signal, a third driving signal and a fourth driving signal are controlled to enable the first NMOS pipe and the second NMOS pipe to be disconnected before the third NMOS pipe and the fourth NMOS pipe are disconnected, and the third NMOS pipe and the fourth NMOS pipe to be connected before the first NMOS pipe and the second NMOS pipe are connected, so that problems of gate electrode leakage and inverse voltage caused by the situation that the first NMOS pipe and the third NMOS pipe, connected in series or the second NMOS pipe and the fourth NMOS pipe, connected in series are connected or disconnected are solved; as the OC gate is adopted, the reliability is high.

Description

The highly reliable inductive load Driving technique of a kind of spacecraft

Technical field

The present invention relates to Driving technique, relate in particular to the high reliability Driving technique of spaceborne inductive load.

Background technology

On spacecraft, the technology that field effect transistor drives is generally all taked in the driving of inductive load, because life-span and the reliability requirement of existing spacecraft are more and more higher, therefore adopt single field effect transistor driving, single string or list field effect transistor driving can only adapt in more special occasion, it is optimum that its reliability does not reach.And while realizing the type of drive of two and two strings by field effect transistor, series connection field effect transistor produces drain-gate utmost point counter voltage when break-make, this can make to drive the reliability of inductive load to reduce.

Summary of the invention

The technical problem to be solved in the present invention is to drive inductive load to have the problem of drain-gate utmost point counter voltage with OC door.

In order to address the above problem, the present invention discloses a kind of spacecraft high reliability inductive load Driving technique, a kind of drive circuit in the present invention, this drive circuit comprises that the OC door, the 5th NMOS pipe, the first bleeder circuit, the second bleeder circuit and the 6th NMOS that a NMOS pipe, the 2nd NMOS pipe, the 3rd NMOS pipe and the 4th NMOS pipe, consist of manage, wherein, the grid of a described NMOS pipe is connected in primary power source by the first bleeder circuit, is also connected in the drain electrode of the 5th NMOS pipe; The source ground of described the 5th NMOS pipe, grid receives first and drives signal; The grid of described the 2nd NMOS pipe is connected in primary power source by the second bleeder circuit, is also connected in the drain electrode of the 6th NMOS pipe; The source ground of described the 6th NMOS pipe, grid receives two driving signal; The source ground of described the 3rd NMOS pipe, grid receives the 3rd and drives signal; The source ground of described the 4th NMOS pipe, grid receives the moving signal of 4 wheel driven; The described the 3rd drives signal and the moving signal of 4 wheel driven to control respectively described the 3rd NMOS pipe and the 4th NMOS pipe conducting or cut-off, first drives signal and two driving signal to control respectively a described NMOS pipe and the 2nd NMOS pipe conducting or cut-off, described the 3rd NMOS pipe and the 4th NMOS pipe are prior to a NMOS pipe and the conducting of the 2nd NMOS pipe, and a described NMOS pipe and the 2nd NMOS pipe are prior to the 3rd NMOS pipe and the cut-off of the 4th NMOS pipe.

As a kind of improvement project, described the first bleeder circuit comprises the first resistance and second resistance of series connection, this first resistance is connected in described primary power source, this second grounding through resistance, described the second bleeder circuit comprises the 3rd resistance and the 4th resistance of series connection, the 3rd resistance connects described primary power source, the 4th grounding through resistance.

Compared with prior art, advantage of the present invention and beneficial effect are:

Owing to adopting OC door to drive described inductive load as main driving, like this, realized the high reliability of Perceptual Load Drive Circuit, provide gain to spacecraft long-life and highly reliable work; In addition, due to when the conducting, make the 3rd NMOS pipe and the conducting of the 4th NMOS pipe prior to a NMOS pipe and the conducting of the 2nd NMOS pipe, when turn-offing, make a NMOS pipe and the 2nd NMSO pipe turn-off prior to the 3rd NMOS pipe and the 4th NMOS pipe, so, avoid drain-gate utmost point counter voltage to make pipe in energy consumption, even burn the problem of pipe, moreover because circuit is that discrete device forms, so its electric circuit constitute is simple, be convenient to application, meanwhile, the circuit that discrete device forms also useful application, in thick film circuit, is realized Miniaturization Design.

Accompanying drawing explanation

Below with reference to drawings and Examples, the invention will be further described.

Fig. 1 is the connection diagram of drive circuit.

Embodiment

As shown in Figure 1, spacecraft high reliability inductive load Driving technique of the present invention (circuit) is for driving inductive load, this inductive load can be valve, and this drive circuit includes OC door 1, the 5th NMOS pipe Q5, the first bleeder circuit, the second bleeder circuit and the 6th NMOS pipe Q6 that a NMOS pipe Q1, the 2nd NMOS pipe Q2, the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4 form.The grid of a described NMOS pipe Q1 is connected in primary power source by the first bleeder circuit, is also connected in the drain electrode of the 5th NMOS pipe Q5, and concrete, this first bleeder circuit comprises; The source ground of described the 5th NMOS pipe Q5, grid receives first and drives signal S1, and this first driving signal S1 controls conducting or the cut-off of a described NMOS pipe Q1.The grid of described the 2nd NMOS pipe Q2 is connected in primary power source by the second bleeder circuit, also be connected in the drain electrode of the 6th NMOS pipe Q6, concrete, described the second bleeder circuit comprises: the source ground of described the 6th NMOS pipe Q6, grid receives two driving signal S2, and this two driving signal S2 controls conducting or the cut-off of described the 2nd NMOS pipe Q2.The grid of described the 3rd NMOS pipe Q3 receives the 3rd and drives signal S3, source ground, and the 3rd drives signal S3 to control conducting or the cut-off of described the 3rd NMOS pipe Q3.The grid of described the 4th NMOS pipe Q4 receives the moving signal S4 of 4 wheel driven, source ground, and the moving signal S4 of this 4 wheel driven controls conducting or the cut-off of described the 4th NMOS pipe Q4.The described the 3rd drives signal and the moving signal of 4 wheel driven to control respectively described the 3rd NMOS pipe and the 4th NMOS pipe conducting or cut-off, first drives signal and two driving signal to control respectively a described NMOS pipe and the 2nd NMOS pipe conducting or cut-off, described the 3rd NMOS pipe and the 4th NMOS pipe are prior to a NMOS pipe and the conducting of the 2nd NMOS pipe, and a described NMOS pipe and the 2nd NMOS pipe are prior to the 3rd NMOS pipe and the cut-off of the 4th NMOS pipe.

Please continue to refer to Fig. 1, the highly reliable inductive load Driving technique of spacecraft of the present invention (circuit) is for driving inductive load L1, in the present invention, the OC door consisting of a NMOS pipe Q1, the 2nd NMOS pipe Q2, the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4 is as main drive circuit, like this, can guarantee the high reliability of driving.In addition, when adopting OC door as main driving, due to a NMOS pipe Q1 and the 3rd NMOS pipe Q3 employing cascaded structure, because the operating current of inductive load L1 is larger, so, when a NMOS pipe Q1 and the 2nd NMOS pipe Q2 conducting, the pressure drop of the one NMOS pipe Q1 and the 2nd NMOS pipe Q2 conducting is larger, like this, can cause the 3rd NMOS pipe Q3 to have pressure drop, thus, the difference of the one grid of NMOS pipe and the voltage of source electrode is less, cause a NMOS pipe Q1 in power consumption state, power consumption increases, and when serious, can cause device to burn.So, for fear of the voltage difference (drain-gate exists counter voltage) between grid and source electrode, affect the problem of device, the present invention is provided with the 5th NMOS pipe Q5 and the 6th NMOS pipe Q6, and control the conducting of described the 5th NMOS pipe Q5 and the 6th NMOS pipe Q6 or conducting or the cut-off that a NMOS pipe Q1 and the 2nd NMOS pipe Q2 are controlled in cut-off by the first driving signal S1 and two driving signal S2, the problems referred to above have been solved, in addition, the grid voltage of considering a NMOS pipe Q1 and the 2nd NMOS pipe Q2 is 20V to the maximum, so, be that a NMOS pipe Q1 and the 2nd NMOS pipe Q2 arrange the first bleeder circuit and the second bleeder circuit, by the first bleeder circuit and the second bleeder circuit, primary power source is carried out to dividing potential drop rear drive the one NMOS pipe Q1 and the 2nd NMOS pipe Q2.

Please continue to refer to Fig. 1, the type of drive of the reliable inductive load Driving technique of spacecraft of the present invention is as follows:

1. at load L1 described in demand motive, first by the 3rd, drive signal S3 and the moving signal S4 of 4 wheel driven to drive the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4 conducting, then, by the first driving signal S1 and two driving signal S2, make the 5th NMOS pipe Q5 conducting and the 6th NMOS pipe Q6 conducting, and then, can be so that the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4 manage Q2 conducting prior to a NMOS pipe Q1 and the 2nd NMOS, avoid because the problem that the NMOS pipe that drain-gate utmost point counter voltage causes in power consumption state, even makes NMOS pipe damage.

2. at needs, turn-off described load L1, first by the first driving signal S1 and two driving signal S2, control described the 5th NMOS pipe Q5 and the 6th NMOS pipe Q6 turn-offs, and then, a described NMOS pipe Q1 and the 2nd NMOS pipe Q2 are turn-offed, then, by the 3rd, drive signal S3 and the moving signal S4 of 4 wheel driven to control described the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4 turn-offs.

In sum, the present invention drives described inductive load by OC door as main driving, owing to adopting OC door to adopt two strings and two mode also, when left side (a NMOS pipe Q1 and the 3rd NMOS pipe Q3) is as a road or (the 2nd NMOS pipe Q2 and the 3rd NMOS pipe Q3) during as riches all the way raw fault, can also normally work in another road, so, improved reliability, in addition, by when turn-offing, by the first driving signal S1 and two driving signal S2, control a NMOS pipe Q1 and the 2nd NMOS pipe Q2 turn-offs prior to the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4, and when conducting, first conducting the one NMOS pipe Q1 and the 2nd NMOS pipe Q2, and then conducting the 3rd NMOS pipe Q3 and the 4th NMOS pipe Q4, like this, avoid drain-gate utmost point counter voltage.

Claims

1. the highly reliable inductive load Driving technique of spacecraft, it is characterized in that: comprise that the OC door, the 5th NMOS pipe, the first bleeder circuit, the second bleeder circuit and the 6th NMOS that a NMOS pipe, the 2nd NMOS pipe, the 3rd NMOS pipe and the 4th NMOS pipe, consist of manage, wherein

The grid of a described NMOS pipe is connected in primary power source by the first bleeder circuit, is also connected in the drain electrode of the 5th NMOS pipe;

The source ground of described the 5th NMOS pipe, grid receives first and drives signal;

The grid of described the 2nd NMOS pipe is connected in primary power source by the second bleeder circuit, is also connected in the drain electrode of the 6th NMOS pipe;

The source ground of described the 6th NMOS pipe, grid receives two driving signal;

The source ground of described the 3rd NMOS pipe, grid receives the 3rd and drives signal;

The source ground of described the 4th NMOS pipe, grid receives the moving signal of 4 wheel driven;

The described the 3rd drives signal and the moving signal of 4 wheel driven to control respectively described the 3rd NMOS pipe and the 4th NMOS pipe conducting or cut-off, first drives signal and two driving signal to control respectively a described NMOS pipe and the 2nd NMOS pipe conducting or cut-off, described the 3rd NMOS pipe and the 4th NMOS pipe are prior to a NMOS pipe and the conducting of the 2nd NMOS pipe, and a described NMOS pipe and the 2nd NMOS pipe are prior to the 3rd NMOS pipe and the cut-off of the 4th NMOS pipe.

2. the highly reliable inductive load Driving technique of spacecraft as claimed in claim 1, it is characterized in that: described the first bleeder circuit comprises the first resistance and second resistance of series connection, this first resistance is connected in described primary power source, this second grounding through resistance, described the second bleeder circuit comprises the 3rd resistance and the 4th resistance of series connection, the 3rd resistance connects described primary power source, the 4th grounding through resistance.