Driving signal coupling circuit suitable for satellite-borne power converter

Abstract

The invention discloses a driving signal coupling circuit suitable for a satellite-borne power converter, which is mainly suitable for the occasion that the satellite-borne power converter needs to drive a related power circuit after double driving signals are coupled, and consists of conventional discrete devices, such as a resistor, a diode, a triode and the like, which are insensitive to a space single particle. An external additional power supply is not needed, the relationship of driving signal logic OR is realized, and the risk problem of failure of a driving signal coupling circuit of a logic OR gate chip caused by spatial single particles is solved. The circuit is also suitable for some key signal processing circuits of other aerospace electronic single machines and occasions where dual-drive signals need to be used after being coupled. The circuit is simple and ingenious, and has the advantages of high reliability, high practicability, simplicity, flexibility, modularization, wide application range and the like.

Description

Technical Field

[0001] The invention relates to a driving signal coupling circuit suitable for a satellite-borne power converter, suitable for various series of satellite-borne power converters, and belongs to the field of space satellite-borne power supplies. Background Art

[0002] At present, the power supply system in the field of space-borne power supply is equipped with power converters. As the intermediate control hub of the energy transmission of the whole satellite, it is responsible for coordinating the work between the load and the battery pack during the whole satellite's orbit. According to the power supply voltage requirements of the whole satellite, the chemical energy of the battery pack is converted into bus voltage with different voltage requirements through the power converter for the use of the whole satellite load. Due to different usage requirements, the power converter usually adopts the buck or boost circuit topology. The conversion circuit is generally built with analog circuits. The components used mainly include: resistors, capacitors, pulse width modulation chips, gate circuits, operational amplifiers, comparators, magnetic devices, etc. Due to the extremely harsh space radiation environment and the randomness and complexity of the radiation conditions, the gate circuit chips (such as OR gates, AND gates, triggers, etc.) used in the power converter circuit are subject to great damage risks. The power converter function fails due to single particle damage (such as chip lock, flip-flop), resulting in abnormal operation of the whole satellite power supply system and damage to the spacecraft equipment, thus causing irreparable losses. Therefore, a reliable and reliable power converter space environment adaptability design provides a strong guarantee for the safe operation of space-borne spacecraft.

[0003] Some existing onboard power systems are equipped with onboard power converters, especially the converter circuits that require single modulator drive all adopt the form of drive signal coupling circuits. This circuit uses an "OR gate" integrated circuit to realize the coupling function of the drive signal. For example, the "OR gate" integrated chip CC4071 is used. This chip can realize the coupling of complementary drive pulses produced by the drive signal generator and provide drive signals for the back-end drive circuit. The drive signal coupling circuit using the "OR gate" function integrated circuit uses a small number of components, and only one OR gate integrated chip is needed to realize the complementary drive pulse coupling function. Since the integrated circuit is made using CMOS integration technology, it is easy to be affected by single particle impact (such as chip locking and flipping) in a complex space environment, causing the power converter circuit to fail. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art, to provide a drive signal coupling circuit suitable for a satellite-borne power converter, and to solve the problem that a drive signal coupling circuit using a logic "OR gate" chip may fail due to a single particle in space. The circuit is simple and clever, has high reliability, high practicality, is simple and clever, can be modularized, and has a wide range of applications.

[0005] The technical solution of the present invention is: a driving signal coupling circuit suitable for a satellite-borne power converter, comprising: a forward pulse signal output circuit, a driving signal recovery circuit, wherein:

[0006] The positive pulse signal output circuit is used to couple the complementary signal generated by the driving signal generator to form a driving signal pulse and provide it to the back-end driving circuit;

[0007] The driving signal recovery circuit is used to reduce the driving voltage of the driving circuit from a high level to zero voltage when the driving signal generator has no output.

[0008] Preferably, the driving signal generator has two output ports, outputting two paths of driving signal pulses, and the two output ports are respectively recorded as Output A and Output B.

[0009] Preferably, the forward pulse signal output circuit includes: a diode D1, a diode D2, and a diode D3, specifically:

[0010] The anode of the diode D1 is connected to the OutputA terminal of the driving signal generator, and the cathode is connected to the anode of the diode D3;

[0011] The cathode of diode D3 is connected to the driving circuit;

[0012] The anode of the diode D2 is connected to the OutputB terminal of the driving signal generator, and the cathode of the diode D2 is connected to the anode of the diode D3 and the cathode of the diode D1.

[0013] Preferably, the driving signal recovery circuit includes: a resistor R1, a resistor R2, a transistor Q1, and a transistor Q2. Specifically:

[0014] One end of the resistor R1 is connected to the OutputA end of the driving signal generator, and the other end is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the OutputB end of the driving signal generator; the position where the resistor R1 and the resistor R2 are directly connected is defined as the common end of the resistor R1 and the resistor R2;

[0015] The common end of the resistor R1 and the resistor R2 is connected to the cathodes of the diode D2 and the diode D1 at the same time, and is also connected to the base of the transistor Q1;

[0016] The emitter of transistor Q1 is connected to the base of transistor Q2, and its collector is connected to the signal ground and also connected to the collector of transistor Q2;

[0017] The emitter of the transistor Q2 is connected to the cathode of the diode D3 and is also connected to the driving circuit.

[0018] Preferably, the OutputA and OutputB terminals of the drive signal generator output complementary drive signal pulses, the duty cycle of each drive signal pulse is not greater than 50%, and there is a dead time of 2% to 3%.

[0019] Preferably, the pulse voltage amplitude of the driving signal generated by the driving signal generator is 10V to 12V.

[0020] Preferably, when the OutputA terminal of the drive signal generator outputs a forward drive signal pulse, diodes D1 and D3 are turned on and diode D2 is in a cut-off state; when the OutputB terminal of the drive signal generator outputs a forward drive signal pulse, diodes D2 and D3 are turned on and diode D1 is in a cut-off state, so that the forward drive signal pulse of the drive signal generator is transmitted to the drive circuit via the drive signal coupling circuit.

[0021] Preferably, when there is no output at the OutputA terminal or the OutputB terminal of the driving signal generator, the driving circuit discharges the driving voltage through transistor Q2, transistor Q1, resistor R1, and resistor R2, that is, the driving voltage of the driving circuit is reduced from a high level to zero voltage.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present invention adopts a circuit composed of three conventional components, namely a resistor, a diode, and a triode, which are insensitive to single particles and do not require an external power supply, to achieve a logical "OR" relationship of the drive signal, thereby solving the risk of failure of the drive signal coupling circuit using a logic "OR gate" chip due to a single particle in space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a driving signal coupling circuit diagram suitable for a satellite-borne power converter. DETAILED DESCRIPTION

[0025] The following combination Figure 1 A driving signal coupling circuit suitable for a satellite-borne power converter of the present invention is further described in detail.

[0026] like Figure 1 As shown, the purpose of the present invention is to provide a driving signal coupling circuit suitable for a satellite-borne power converter. The circuit is simple and ingenious, and has the advantages of high reliability, high practicality, simplicity, ingenuity, modularity, and a wide range of applications.

[0027] In order to achieve the above-mentioned purpose, the present invention provides a drive signal coupling circuit suitable for a satellite-borne power converter. The signal coupling circuit is composed of conventional discrete devices such as resistors, diodes, and triodes that are insensitive to single particles in space. No external power supply is required to realize the logical "OR" relationship of the drive signal, thereby solving the risk of failure of the drive signal coupling circuit using a logic "OR gate" chip due to single particles irradiated in space. The circuit is characterized in that it includes: a forward pulse signal output circuit and a drive signal recovery circuit; wherein the forward pulse signal output circuit is used to couple the complementary signals generated by the drive signal generator to form a drive signal pulse and provide it to the back-end drive circuit; the drive signal recovery circuit is used to reduce the drive voltage of the drive circuit from a high level to zero voltage through the circuit when there is no output at the Output A terminal or the Output B terminal of the drive signal generator; the drive signal coupling circuit is composed of the forward pulse signal output circuit and the drive signal recovery circuit.

[0028] The forward pulse signal output circuit is connected to the drive signal generator at one end and connected to the drive circuit at the other end, and is composed of a diode D1, a diode D2, and a diode D3. The OutputA and OutputB ends of the drive signal generator output complementary drive signal pulses, the duty cycle of each signal is not greater than 50%, and there is a dead time of about 2% to 3%. The drive signal pulse voltage amplitude generated by the drive signal generator is 10V to 12V. When the OutputA end of the drive signal generator outputs a forward drive signal pulse, the diodes D1 and D3 are turned on, and the diode D2 is in a cut-off state. When the OutputB end of the drive signal generator outputs a forward drive signal pulse (high level), the diodes D2 and D3 are turned on, and the diode D1 is in a cut-off state, so that the forward pulse signals at the OutputA and OutputB ends of the drive signal generator are transmitted to the drive circuit via the drive signal coupling circuit.

[0029] The driving signal recovery circuit is connected to the driving signal generator at one end and connected to the driving circuit at the other end, and is composed of a resistor R1, a resistor R2, a transistor Q1, and a transistor Q2. When there is no output at the OutputA or OutputB end of the driving signal generator, the driving signal recovery of the driving circuit needs to be realized through the transistor Q2, the transistor Q1, the resistor R1, and the resistor R2 to discharge the driving voltage, that is, the driving voltage of the driving circuit is reduced from a high level to zero voltage.

[0030] The forward pulse signal output circuit includes: a diode D1, a diode D2, and a diode D3, and the connection relationship is: the anode of the diode D1 is connected to the OutputA terminal of the drive signal generator, the cathode of the diode D1 is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the drive circuit, the anode of the diode D2 is connected to the OutputB terminal of the drive signal generator, and the cathode of the diode D2 is connected to the anode of the diode D3.

[0031] The driving signal recovery circuit comprises: a resistor R1, a resistor R2, a transistor Q1, and a transistor Q2, and the connection relationship is: pin 1 of the resistor R1 is connected to the OutputA end of the driving signal generator, pin 2 of the resistor R1 is connected to the pin 1 of the resistor R2, and the pin 2 of the resistor R2 is connected to the OutputB end of the driving signal generator. Pin 2 of the resistor R1 is also connected to the cathode of the diode D2, the b pole (base) of the transistor Q1 is connected to the cathode of the diode D2, the e pole (emitter) of the transistor Q1 is connected to the b pole (base) of the transistor Q2, the c pole (collector) of the transistor Q1 is connected to the c pole (collector) of the transistor Q2, the c pole (collector) of the transistor Q1 is also connected to the signal ground, and the e pole (emitter) of the transistor Q2 is connected to the cathode of the diode D3, and is also connected to the driving circuit.

[0032] The drive signal coupling circuit of the present invention, which is suitable for a satellite-borne power converter, adopts a circuit composed of conventional components such as resistors, diodes, and triodes that are insensitive to single particles, does not require an external power supply, and realizes the logical "OR" relationship of the drive signal, thereby solving the risk of failure of the drive signal coupling circuit using a logic "OR gate" chip due to single particles in space.

[0033] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in this field.

Claims

1. A driving signal coupling circuit suitable for a satellite-borne power converter, characterized in that include: Positive pulse signal output circuit, drive signal recovery circuit, where: The positive pulse signal output circuit is used to couple the complementary signal generated by the driving signal generator to form a driving signal pulse and provide it to the back-end driving circuit; The driving signal recovery circuit is used to reduce the driving voltage of the driving circuit from a high level to zero voltage when the driving signal generator has no output.

2. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 1, characterized in that: The driving signal generator has two output ports, outputting two driving signal pulses, and the two output ports are respectively denoted as OutputA and OutputB.

3. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 2, characterized in that: The forward pulse signal output circuit includes: diode D1, diode D2, diode D3, specifically: The anode of the diode D1 is connected to the OutputA terminal of the driving signal generator, and the cathode is connected to the anode of the diode D3; The cathode of diode D3 is connected to the driving circuit; The anode of the diode D2 is connected to the OutputB terminal of the driving signal generator, and the cathode of the diode D2 is connected to the anode of the diode D3 and the cathode of the diode D1.

4. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 3, characterized in that: The driving signal recovery circuit includes: a resistor R1, a resistor R2, a transistor Q1, and a transistor Q2. Specifically: One end of the resistor R1 is connected to the OutputA end of the driving signal generator, and the other end is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the OutputB end of the driving signal generator; the position where the resistor R1 and the resistor R2 are directly connected is defined as the common end of the resistor R1 and the resistor R2; The common end of the resistor R1 and the resistor R2 is connected to the cathodes of the diode D2 and the diode D1 at the same time, and is also connected to the base of the transistor Q1; The emitter of transistor Q1 is connected to the base of transistor Q2, and its collector is connected to the signal ground and also connected to the collector of transistor Q2; The emitter of the transistor Q2 is connected to the cathode of the diode D3 and is also connected to the driving circuit.

5. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 2, characterized in that: The OutputA and OutputB terminals of the drive signal generator output complementary drive signal pulses. The duty cycle of each drive signal pulse is not greater than 50%, and there is a dead time of 2% to 3%.

6. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 5, characterized in that: The driving signal pulse voltage amplitude generated by the driving signal generator is 10V to 12V.

7. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 3, characterized in that: When the OutputA terminal of the drive signal generator outputs a forward drive signal pulse, diodes D1 and D3 are turned on, and diode D2 is in a cut-off state. When the OutputB terminal of the drive signal generator outputs a forward drive signal pulse, diodes D2 and D3 are turned on, and diode D1 is in a cut-off state, so that the forward drive signal pulse of the drive signal generator is transmitted to the drive circuit through the drive signal coupling circuit.

8. The driving signal coupling circuit suitable for a satellite-borne power converter according to claim 4, characterized in that: When there is no output at the OutputA or OutputB end of the driving signal generator, the driving circuit discharges the driving voltage through transistor Q2, transistor Q1, resistor R1, and resistor R2, that is, the driving voltage of the driving circuit is reduced from a high level to zero voltage.

Images