CN215186677U - Novel 28V military solid-state power relay - Google Patents
Novel 28V military solid-state power relay Download PDFInfo
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- CN215186677U CN215186677U CN202120669902.XU CN202120669902U CN215186677U CN 215186677 U CN215186677 U CN 215186677U CN 202120669902 U CN202120669902 U CN 202120669902U CN 215186677 U CN215186677 U CN 215186677U
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Abstract
The utility model discloses a novel 28V military solid-state power relay, which comprises a transient suppression module, an energy storage module, a voltage hysteresis module, a fast switch module, a micro isolation driving module and a bidirectional power module, wherein the transient suppression module is connected with a control signal; the energy storage module transient suppression module is connected; the control input and voltage hysteresis module is connected with the energy storage module and is used for controlling input and realizing a preset voltage hysteresis region; the fast switch module is used for switching on or switching off the output of the post-stage circuit; the micro isolation driving module is connected with the output end of the quick switch module and is used for driving the bidirectional power module; and the input end of the bidirectional power module is connected with the output end of the miniature isolation driving module, and the output end of the bidirectional power module is used as the input/output end of the power relay. The power device is prevented from generating an on/off critical state; the power is not cut off for more than 50ms in the power conversion process; the voltage hysteresis region ensures the voltage on/off characteristics.
Description
Technical Field
The utility model relates to an aviation airborne electronic equipment technical field especially relates to for military use solid state power relay, specific theory is a novel for military use solid state power relay of 28V.
Background
In the prior art, a civil solid-state power relay is usually switched on and off by isolating and controlling 220V alternating current commercial power with a small control signal, and a direct current power supply on a helicopter is 28V and cannot be directly used. On the basis of a civil solid-state power relay, a part of manufacturers simply adapt to the requirement of on-off control of direct current 28V on a military helicopter by replacing a driving circuit and a power switch, as shown in the attached drawing 1, the improved military solid-state relay on the basis of the civil solid-state power relay only has basic on/off capacity and cannot be directly and reliably used on a helicopter with a complex power utilization environment, and the problems that: 1) when the control voltage is reduced to a driving critical point of the power switch, the power switch is in an on/off critical state, and the power switch can rapidly heat or even burn when being loaded; 2) when the helicopter performs power conversion operation, the control end cannot maintain the power conversion process, so that the controlled load is abnormally powered down; 3) the helicopter power system has 80V voltage surge, and the control end cannot reliably work or even burn under the voltage surge condition; 4) the voltage of the control end is a voltage point when the on/off voltage is the critical point, and the power switch can be turned on/off back and forth at the critical point, so that the electric equipment is damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel for military use solid state power relay of 28V for solve among the prior art for military use solid state power relay of improving on the basis only possess basic opening/shutoff ability, the problem of direct reliable use on the helicopter that the power consumption environment is complicated.
The utility model discloses a following technical scheme solves above-mentioned problem:
the utility model provides a novel for military use solid-state power relay of 28V, includes transient state suppression module, energy storage module, voltage hysteresis module, fast switch module, miniature isolation drive module and two-way power module and constitutes, wherein:
the transient suppression module is connected with the control signal and is used for performing voltage suppression and current limitation when the control signal has high voltage;
the energy storage module is connected with the transient suppression module and used for storing or discharging voltage;
the control input and voltage hysteresis module is connected with the energy storage module and is used for controlling input and realizing a preset voltage hysteresis region;
the fast switch module is used for switching on or switching off the output of the post-stage circuit according to the output signal of the voltage hysteresis module;
the micro isolation driving module is connected with the output end of the quick switch module and is used for driving the bidirectional power module;
and the input end of the bidirectional power module is connected with the output end of the miniature isolation driving module, and the output end of the bidirectional power module is used as the input/output end of the power relay.
The utility model is provided with a transient suppression module and an energy storage module at the front end of a control input and voltage hysteresis module, and the transient suppression module carries out voltage suppression and current limiting under the condition of high voltage existing in input, and prevents a rear-stage circuit from being damaged; the energy storage module stores voltage energy when the input end is electrified and supplies power to the post-stage circuit when the input end is not electrified. The transient suppression module and the energy storage module can maintain the control input and voltage hysteresis module for more than 50ms without power failure in the power conversion process while suppressing voltage surge, and the requirement of power supply characteristics of military electric equipment is met. The control input and voltage hysteresis module reduces the overall power consumption, ensures the voltage on/off characteristic in the voltage hysteresis region, and prevents the misoperation of the solid-state power relay caused by the tiny fluctuation of the power supply on the helicopter. The fast switch module only has two states of on and off, and has no process of slowly rising or falling voltage, thereby protecting a rear-stage circuit; the micro isolation driving module drives the bidirectional power module, and the bidirectional power module is adopted to enable the power end connection line to have no polarity requirement.
The transient suppression module comprises a resistor R61 and a diode D31, wherein a first end of the resistor R61 is connected with the control signal, a second end of the resistor R61 is connected with a first end of a diode D31, and a second end of a diode D31 is grounded; the second end of the resistor R61 is connected with the input end of the energy storage module.
Under the condition that the input has high voltage, the diode D31 breaks down reversely to suppress the voltage, and the current is limited through the resistor R61 to prevent the rear-stage circuit from being damaged.
The energy storage module comprises a diode D30 and a capacitor C7, a first end of the diode D30 is connected with a second end of the resistor R61, a second end of the diode D30 is connected with a first end of the capacitor C7, and a second end of the capacitor C7 is grounded; a second terminal of the diode D30 is connected to the control input and the voltage hysteresis module.
When the input end is electrified, the voltage is stored through the capacitor C7, when the input end is not electrified, the later stage circuit is powered through the capacitor C7, and the diode D30 is used for preventing the anti-series of the capacitor C7 energy storage module during the discharge.
The control input and voltage hysteresis module comprises a resistor R67, a diode D32, a resistor R63, a resistor R66, a resistor R59 and a two-way differential comparator, wherein a first end of the resistor R67 is connected with a second end of the diode D30, a second end of the resistor R67 is connected with a first end of the diode D32, and a second end of the diode D32 is grounded; the second end of the resistor R67 is connected with the negative input end of the two-way differential comparator; the first end of the resistor R63 is connected with the second end of the diode D30 and the voltage input end of the double-way differential comparator, the second end of the resistor R63 is connected with the first end of the resistor R66, the first end of the resistor R59 and the positive input end of the double-way differential comparator, the second end of the resistor R66 is grounded, and the second end of the resistor R59 is connected with the output end of the double-way differential comparator and the input end of the fast switch module.
The fast comparison circuit is composed of a resistor R66, a resistor R63, a diode D32 and a two-way differential comparator, the fast comparison circuit is turned over after the input voltage is larger than 18V, a hysteresis comparison circuit is formed under the participation of a positive feedback resistor, namely a resistor R59, the positive feedback voltage is increased, the comparator is turned over again only after the input voltage is smaller than 10V, and an 8V voltage hysteresis module is formed.
A voltage dividing resistor R65 and a voltage dividing resistor R68 are connected in series between the resistor R63 and the first end and the second end of the resistor R66, and the input end of the fast switch module is connected with a node between the resistor R65 and the resistor R68.
The fast switch module includes MOS pipe Q7 and isolation drive opto-coupler, MOS pipe Q7's gate is connected the second end of resistance R59, the input of isolation drive opto-coupler is connected respectively the output of energy storage module, and MOS pipe Q7's source electrode, the output of isolation drive opto-coupler is connected miniature isolation drive module.
Because the isolation driving optocoupler has the linear optocoupler characteristic, when the input voltage changes slowly, the output voltage of the isolation driving optocoupler is also slowly increased from low, the process can cause that a rear-stage power device is slowly switched on to cause damage, the implantation of the rapid switch module enables the input of the isolation driving optocoupler to only have two states of rapid switching-on/switching-off, the process of slowly increasing or decreasing the voltage does not exist, and the rear-stage power device is protected.
The isolation driving optocoupler is a plurality of cascaded optocouplers, and the output end of each optocoupler is connected with one isolation driving unit of the miniature isolation driving module respectively. The bidirectional power module comprises a plurality of bidirectional power units, each bidirectional power unit is respectively connected with the isolation driving unit, each bidirectional power unit comprises a first MOS (metal oxide semiconductor) tube and a second MOS tube, the grids of the first MOS tube and the second MOS tube are connected with the positive output end of the isolation driving unit in a common way, the drains of the first MOS tube and the second MOS tube are connected with the negative output end of the isolation driving unit in a common way, and the source of the first MOS tube is respectively connected with a first diode and a first capacitor and then grounded to be used as one input/output end of the bidirectional power unit; and the source electrode of the second MOS tube is respectively connected with the second diode and the second capacitor and then grounded to be used as the other input/output end of the bidirectional power unit.
Because the electricity environment on the helicopter is complex, various load characteristics such as inductance, resistance, capacitance and the like exist, if 1 power switch is adopted, the direction of power signal input and output is limited, the maintainability is poor, and the bus bar voltage on the helicopter is interfered when reverse surge is provided. Adopt the two-way power unit that first MOS pipe and second MOS pipe are constituteed, can connect the input in the arbitrary one end of first MOS pipe and second MOS pipe, do not have the direction requirement, because power switch self characteristic, inside possesses parasitic diode, adopts two-way power module to carry out the mirror image connection, and two inside parasitic earphone pipes can prevent that high-voltage signal from anti-stringing back to quick-witted busbar.
Preferably, the number of the optical couplers is 6, and the number of the isolation driving unit and the number of the bidirectional power units are 6.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model adopts the nonlinear control mode to control the power switch by designing the fast switch module, thereby avoiding the critical state of the power device on/off; the control transient suppression module and the energy storage module can maintain the control end to be uninterrupted for more than 50ms in the power conversion process while suppressing the voltage surge of 80V; the control input and voltage hysteresis circuit reduces the whole power consumption, and simultaneously, the large voltage hysteresis area ensures the voltage on/off characteristic, realizes the 10V off 18V on, has the voltage hysteresis area of 8V, and prevents the misoperation of the solid power relay caused by the tiny fluctuation of the on-board power supply.
(2) The utility model discloses a small-size modularized design need not peripheral circuit and can directly use on the complicated helicopter of power consumption environment.
(3) The utility model adopts the fast switch module to prevent the power device from being in a critical state and damaging the device; and the bidirectional power module is adopted to ensure that the power terminal wire has no polarity requirement.
Drawings
FIG. 1 is a functional block diagram of a prior art solid state power relay;
FIG. 2 is a schematic block diagram of the present invention;
fig. 3 is a schematic circuit diagram of the transient suppression module, the energy storage module, the voltage hysteresis module, the fast switching module, and the micro isolation driving module of the present invention;
fig. 4 is a schematic circuit diagram of a bidirectional power module according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1:
with reference to fig. 2, a novel 28V military solid-state power relay includes a transient suppression module, an energy storage module, a voltage hysteresis module, a fast switching module, a micro isolation driving module, and a bidirectional power module, wherein:
the transient suppression module is connected with the control signal and is used for performing voltage suppression and current limitation when the control signal has high voltage;
the energy storage module is connected with the transient suppression module and used for storing or discharging voltage;
the control input and voltage hysteresis module is connected with the energy storage module and is used for controlling input and realizing a preset voltage hysteresis region;
the fast switch module is used for switching on or switching off the output of the post-stage circuit according to the output signal of the voltage hysteresis module;
the micro isolation driving module is connected with the output end of the quick switch module and is used for driving the bidirectional power module;
and the input end of the bidirectional power module is connected with the output end of the miniature isolation driving module, and the output end of the bidirectional power module is used as the input/output end of the power relay.
The utility model is provided with a transient suppression module and an energy storage module at the front end of a control input and voltage hysteresis module, and the transient suppression module carries out voltage suppression and current limiting under the condition of high voltage existing in input, and prevents a rear-stage circuit from being damaged; the energy storage module stores voltage energy when the input end is electrified and supplies power to the post-stage circuit when the input end is not electrified. The transient suppression module and the energy storage module can maintain the control input and voltage hysteresis module for more than 50ms without power failure in the power conversion process while suppressing voltage surge, and the requirement of power supply characteristics of military electric equipment is met. The control input and voltage hysteresis module reduces the overall power consumption, ensures the voltage on/off characteristic in the voltage hysteresis region, and prevents the misoperation of the solid-state power relay caused by the tiny fluctuation of the power supply on the helicopter. The fast switch module only has two states of on and off, and has no process of slowly rising or falling voltage, thereby protecting a rear-stage circuit; the micro isolation driving module drives the bidirectional power module, and the bidirectional power module is adopted to enable the power end connection line to have no polarity requirement.
Example 2:
based on embodiment 1, as shown in fig. 3 and 4, the transient suppression module includes a resistor R61 and a diode D31, a first terminal of the resistor R61 is connected to the control signal, a second terminal of the resistor R61 is connected to a first terminal of the diode D31, and a second terminal of the diode D31 is connected to ground; the second end of the resistor R61 is connected with the input end of the energy storage module.
Under the condition that the input has high voltage, the diode D31 breaks down reversely to suppress the voltage, and the current is limited through the resistor R61 to prevent the rear-stage circuit from being damaged.
The energy storage module comprises a diode D30 and a capacitor C7, a first end of the diode D30 is connected with a second end of the resistor R61, a second end of the diode D30 is connected with a first end of the capacitor C7, and a second end of the capacitor C7 is grounded; a second terminal of the diode D30 is connected to the control input and the voltage hysteresis module.
When the input end is electrified, the voltage is stored through the capacitor C7, when the input end is not electrified, the later stage circuit is powered through the capacitor C7, and the diode D30 is used for preventing the anti-series of the capacitor C7 energy storage module during the discharge.
The control input and voltage hysteresis module comprises a resistor R67, a diode D32, a resistor R63, a resistor R66, a resistor R59 and a two-way differential comparator, wherein a first end of the resistor R67 is connected with a second end of the diode D30, a second end of the resistor R67 is connected with a first end of the diode D32, and a second end of the diode D32 is grounded; the second end of the resistor R67 is connected with the negative input end of the two-way differential comparator; the first end of the resistor R63 is connected with the second end of the diode D30 and the voltage input end of the double-way differential comparator, the second end of the resistor R63 is connected with the first end of the resistor R66, the first end of the resistor R59 and the positive input end of the double-way differential comparator, the second end of the resistor R66 is grounded, and the second end of the resistor R59 is connected with the output end of the double-way differential comparator and the input end of the fast switch module.
The fast comparison circuit is composed of a resistor R66, a resistor R63, a diode D32 and a two-way differential comparator, the fast comparison circuit is turned over after the input voltage is larger than 18V, a hysteresis comparison circuit is formed under the participation of a positive feedback resistor, namely a resistor R59, the positive feedback voltage is increased, the comparator is turned over again only after the input voltage is smaller than 10V, and an 8V voltage hysteresis module is formed.
A voltage dividing resistor R65 and a voltage dividing resistor R68 are connected in series between the resistor R63 and the first end and the second end of the resistor R66, and the input end of the fast switch module is connected with a node between the resistor R65 and the resistor R68.
The fast switch module includes MOS pipe Q7 and isolation drive opto-coupler, MOS pipe Q7's gate is connected the second end of resistance R59, the input of isolation drive opto-coupler is connected respectively the output of energy storage module, and MOS pipe Q7's source electrode, the output of isolation drive opto-coupler is connected miniature isolation drive module.
Because the isolation driving optocoupler has the linear optocoupler characteristic, when the input voltage changes slowly, the output voltage of the isolation driving optocoupler is also slowly increased from low, the process can cause that a rear-stage power device is slowly switched on to cause damage, the implantation of the rapid switch module enables the input of the isolation driving optocoupler to only have two states of rapid switching-on/switching-off, the process of slowly increasing or decreasing the voltage does not exist, and the rear-stage power device is protected.
The isolation driving optocoupler is a plurality of cascaded optocouplers, and the output end of each optocoupler is connected with one isolation driving unit of the miniature isolation driving module respectively.
The bidirectional power module comprises a plurality of bidirectional power units, each bidirectional power unit is respectively connected with the isolation driving unit, each bidirectional power unit comprises a first MOS (metal oxide semiconductor) tube and a second MOS tube, the grids of the first MOS tube and the second MOS tube are connected with the positive output end of the isolation driving unit in a common way, the drains of the first MOS tube and the second MOS tube are connected with the negative output end of the isolation driving unit in a common way, and the source of the first MOS tube is respectively connected with a first diode and a first capacitor and then grounded to be used as one input/output end of the bidirectional power unit; and the source electrode of the second MOS tube is respectively connected with the second diode and the second capacitor and then grounded to be used as the other input/output end of the bidirectional power unit.
Because the electricity environment on the helicopter is complex, various load characteristics such as inductance, resistance, capacitance and the like exist, if 1 power switch is adopted, the direction of power signal input and output is limited, the maintainability is poor, and the bus bar voltage on the helicopter is interfered when reverse surge is provided. Adopt the two-way power unit that first MOS pipe and second MOS pipe are constituteed, can connect the input in the arbitrary one end of first MOS pipe and second MOS pipe, do not have the direction requirement, because power switch self characteristic, inside possesses parasitic diode, adopts two-way power module to carry out the mirror image connection, and two inside parasitic earphone pipes can prevent that high-voltage signal from anti-stringing back to quick-witted busbar.
Preferably, the number of the optical couplers is 6, and the number of the isolation driving unit and the number of the bidirectional power units are 6.
The specific circuit configurations and circuit connections for implementing the modules are merely illustrative, and the embodiments of the present invention are not limited to the above embodiments, it should be understood that many other modifications and embodiments can be devised by those skilled in the art, which fall within the scope and spirit of the principles of the present invention.
Claims (8)
1. The utility model provides a novel for military use solid-state power relay of 28V which characterized in that, includes transient state suppression module, energy storage module, voltage hysteresis module, fast switch module, miniature isolation drive module and two-way power module and constitutes, wherein:
the transient suppression module is connected with the control signal and used for voltage suppression and current limitation;
the energy storage module is connected with the transient suppression module and used for storing or discharging voltage;
the control input and voltage hysteresis module is connected with the energy storage module and is used for controlling input and realizing a preset voltage hysteresis region;
the fast switch module is used for switching on or switching off the output of the post-stage circuit according to the output signal of the voltage hysteresis module;
the micro isolation driving module is connected with the output end of the quick switch module and is used for driving the bidirectional power module;
and the input end of the bidirectional power module is connected with the output end of the miniature isolation driving module, and the output end of the bidirectional power module is used as the input/output end of the power relay.
2. The novel 28V military solid-state power relay of claim 1, wherein the transient suppression module comprises a resistor R61 and a diode D31, a first terminal of the resistor R61 is connected to the control signal, a second terminal of the resistor R61 is connected to a first terminal of a diode D31, and a second terminal of a diode D31 is connected to ground; the second end of the resistor R61 is connected with the input end of the energy storage module.
3. The novel 28V military solid-state power relay as claimed in claim 2, wherein the energy storage module comprises a diode D30 and a capacitor C7, a first end of the diode D30 is connected with a second end of the resistor R61, a second end of the diode D30 is connected with a first end of a capacitor C7, and a second end of the capacitor C7 is grounded; a second terminal of the diode D30 is connected to the control input and the voltage hysteresis module.
4. The novel 28V military solid-state power relay according to claim 3, wherein the control input and voltage hysteresis module comprises a resistor R67, a diode D32, a resistor R63, a resistor R66, a resistor R59 and a two-way differential comparator, a first end of the resistor R67 is connected with a second end of the diode D30, a second end of the resistor R67 is connected with a first end of the diode D32, and a second end of the diode D32 is grounded; the second end of the resistor R67 is connected with the negative input end of the two-way differential comparator; the first end of the resistor R63 is connected with the second end of the diode D30 and the voltage input end of the double-way differential comparator, the second end of the resistor R63 is connected with the first end of the resistor R66, the first end of the resistor R59 and the positive input end of the double-way differential comparator, the second end of the resistor R66 is grounded, and the second end of the resistor R59 is connected with the output end of the double-way differential comparator and the input end of the fast switch module.
5. The novel 28V military solid-state power relay as claimed in claim 4, wherein a voltage dividing resistor R65 and a voltage dividing resistor R68 are connected in series between the resistor R63 and the first end and the second end of the resistor R66, and the input end of the fast switching module is connected with a node between the resistor R65 and the resistor R68.
6. The novel 28V military solid-state power relay according to claim 4 or 5, wherein the fast switching module comprises an MOS transistor Q7 and an isolation driving optical coupler, a gate of the MOS transistor Q7 is connected to the second end of the resistor R59, input ends of the isolation driving optical coupler are respectively connected to the output end of the energy storage module and a source of the MOS transistor Q7, and an output end of the isolation driving optical coupler is connected to the miniature isolation driving module.
7. The novel 28V military solid-state power relay according to claim 6, wherein the isolation driving optocoupler is a plurality of cascaded optocouplers, and an output end of each optocoupler is connected with an isolation driving unit of the micro isolation driving module.
8. The novel 28V military solid-state power relay according to claim 7, wherein the bidirectional power module comprises a plurality of bidirectional power units, each bidirectional power unit is respectively connected with the isolation driving unit, the bidirectional power units comprise a first MOS transistor and a second MOS transistor, the gates of the first MOS transistor and the second MOS transistor are connected in common with the positive output end of the isolation driving unit and the drains of the first MOS transistor and the second MOS transistor are connected in common with the negative output end of the isolation driving unit, and the source of the first MOS transistor is respectively connected with a first diode and a first capacitor and then grounded to serve as one input/output end of the bidirectional power unit; and the source electrode of the second MOS tube is respectively connected with the second diode and the second capacitor and then grounded to be used as the other input/output end of the bidirectional power unit.
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| CN112886954A (en) * | 2021-04-01 | 2021-06-01 | 成都新洲航空设备有限责任公司 | Novel 28V military solid-state power relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112886954A (en) * | 2021-04-01 | 2021-06-01 | 成都新洲航空设备有限责任公司 | Novel 28V military solid-state power relay |
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