A power drive output protection circuit for an on-board electronic system

Abstract

The utility model discloses a kind of power drive output protection circuit for airborne electronic system, including power output monitoring module, power output control module and load;Signal source is connected with power output control module, the signal source is used to output power drive signal to power output control module, the power output control module is used to output power to load;The power output monitoring module is used to monitor the state of load, and output control signal to power output control module, to realize when load normal work, power output control module normal work, when load short-circuit condition occurs, power output control module cuts off power output.The utility model does not contain state back extraction circuit, and does not need CPU and the like digital circuit device;Trigger protection can be sustained protection after, power-off can recover, there is no physical damage, with the advantages of high reliability, good versatility.

Description

Technical Field

[0001] This utility model belongs to the technical field of airborne power drive equipment, specifically relating to a power drive output protection circuit for airborne electronic systems. Background Technology

[0002] In aerospace and automotive fields, with the development of power drive systems or equipment, the requirements for the reliability, safety, and survivability of their drive control are becoming increasingly stringent. Therefore, monitoring the load's operating status is extremely important, with the most common task being monitoring for short circuits or other situations that could cause the load to exceed its rated power. Monitoring the load's operating status is paramount in power drive system design. If the monitoring mechanism is poorly designed, it can lead to load instability or failure to provide drive protection while the power drive system module is operating. Currently, power drive protection functions are typically implemented using status feedback circuits. However, these circuits are complex, requiring CPU chips or related digital circuits for judgment, which increases the complexity of the power drive protection circuit and reduces mission reliability. Utility Model Content

[0003] The purpose of this invention is to provide a power drive output protection circuit for airborne electronic systems, which aims to solve the above-mentioned problems.

[0004] This utility model is mainly achieved through the following technical solutions:

[0005] A power drive output protection circuit for an airborne electronic system includes a power output monitoring module, a power output control module, and a load. A signal source is connected to the power output control module, which outputs a power drive signal to the power output control module, and the power output control module outputs power to the load. The power output monitoring module monitors the status of the load and outputs a control signal to the power output control module to ensure that the power output control module operates normally when the load is working properly, and cuts off the power output when a short circuit occurs in the load.

[0006] To better realize this utility model, the power output control module further includes a relay S2 and a diode D1 connected to each other. The signal source is connected to the relay S2 through the relay S4, and the relay S4 and the relay S2 are directly connected in parallel. The diode D1 is connected to the power output control module, and the relay S2 is connected to the load.

[0007] To better realize this utility model, the power output monitoring module further includes a relay S1, resistors R2 to R5 and a capacitor C1. The diode D1 is connected to the relay S1, resistors R3 and R4 respectively. The relay S1 is connected to the load, resistors R2 and R5 respectively. The resistor R4 is connected in series with the capacitor C1 so that the power drive signal charges the capacitor C1 through the resistor R4, and the stored charge of the capacitor C1 is released through the resistor R3. One end of the resistors R2, R3, R5 and the capacitor C1 is grounded respectively.

[0008] To better realize this utility model, the load further includes a relay S3, an LED1 and a resistor R1. The relays S1 and S2 are respectively connected to the relay S3 and the LED1. The LED1 and the resistor R1 are connected in series. The other ends of the relay S3 and the resistor R1 are respectively grounded.

[0009] To better realize this utility model, the relays S1 and S2 are further solid-state relays.

[0010] To better realize this utility model, the relay S4 is further used to control the input state of the original power drive signal, and the relay S3 is used to control the load state.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention enables the power output control module to operate normally when the load is running normally, and to immediately cut off the power output source when a short circuit occurs in the load, thus achieving power output protection. This invention reliably determines the load's operating status and whether a short circuit or other situation exceeding its rated power has occurred. This invention does not contain a status feedback circuit and does not require digital circuitry such as a CPU; it provides continuous protection after triggering protection, recovers from power failure, and suffers no physical damage, exhibiting high reliability and versatility. Attached Figure Description

[0013] Figure 1 This is a schematic block diagram of the power drive output protection circuit for the airborne electronic system of this utility model;

[0014] Figure 2 This is a power drive output protection circuit diagram for an airborne electronic system according to this utility model. Detailed Implementation

[0015] Example 1:

[0016] A power drive output protection circuit for an airborne electronic system, such as Figure 1As shown, it includes a power output monitoring module, a power output control module, and a load; a signal source is connected to the power output control module, the signal source is used to output a power drive signal to the power output control module, and the power output control module is used to output power to the load; the power output monitoring module is used to monitor the status of the load and output a control signal to the power output control module, so that when the load is working normally, the power output control module works normally, and when the load is short-circuited, the power output control module cuts off the power output.

[0017] Preferably, such as Figure 2 As shown, the power output control module includes a relay S2 and a diode D1 connected to each other. The signal source is connected to the relay S2 through the relay S4, and the relay S4 and the relay S2 are directly connected in parallel.

[0018] The power output monitoring module includes a relay S1, resistors R2 to R5, and a capacitor C1. The diode D1 is connected to the relay S1, resistors R3 and R4 respectively. The relay S1 is connected to the load, resistors R2 and R5 respectively. The resistor R4 is connected in series with the capacitor C1 so that the power drive signal charges the capacitor C1 through the resistor R4, and the stored charge in the capacitor C1 is released through the resistor R3. One end of each of the resistors R2, R3, R5 and the capacitor C1 is grounded.

[0019] The load includes a relay S3, an LED1, and a resistor R1. Relays S1 and S2 are respectively connected to relay S3 and LED1. LED1 and resistor R1 are connected in series. The other ends of relay S3 and resistor R1 are respectively grounded.

[0020] Preferably, relays S1 and S2 are typically solid-state relays, possessing extremely high response speeds to meet the circuit's startup requirements. During operation, this invention uses the input power drive signal as the signal source. The initial circuit state is as follows: relay S4 is open, the original power drive signal is not input, and the circuit has not started working; relay S3 is open, the load is in a normal state, and no short circuit has occurred. When the load is working normally, the power output control module operates normally. When a short circuit occurs in the load, the power output control module immediately cuts off the power output source to achieve power output protection.

[0021] The circuit operation of this utility model specifically includes the following steps:

[0022] 1. When relay S4 closes, the original power drive signal is applied, and the circuit begins to operate. The power drive signal charges capacitor C1 through resistor R4, causing relay S2 to close. The power drive signal starts the load and simultaneously turns on relay S1. Relays S2 and S1 interlock, and the circuit enters a stable operating state.

[0023] 2. Closing relay S3 causes the load to enter an abnormal state (short circuit). Relay S1 is also short-circuited by the load and becomes open-circuited. The interlock between relays S1 and S2 is released, and S2 also becomes open-circuited. The circuit drive output is cut off, and the load is protected. At the same time, the stored charge in capacitor C1 is released through resistor R3, and the circuit returns to its initial state.

[0024] 3. Disconnect relay S4, reconnect S4, and connect the original power drive signal. Since the load is still in a short circuit state, relays S1 and S2 cannot interlock, and the circuit will not output a power drive signal to the load.

[0025] 4. Disconnect relay S3 to release the load short circuit. Then, reclose relay S4 and connect the original power drive signal. Relays S2 and S1 interlock, and the circuit returns to a stable operating state.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A power drive output protection circuit for an airborne electronic system, characterized in that, It includes a power output monitoring module, a power output control module, and a load; a signal source is connected to the power output control module, the signal source is used to output a power drive signal to the power output control module, and the power output control module is used to output power to the load; the power output monitoring module is used to monitor the status of the load and output a control signal to the power output control module, so that when the load is working normally, the power output control module works normally, and when the load is short-circuited, the power output control module cuts off the power output.

2. The power drive output protection circuit for an airborne electronic system according to claim 1, characterized in that, The power output control module includes a relay S2 and a diode D1 connected to each other. The signal source is connected to the relay S2 via a relay S4, and the relay S4 and the relay S2 are directly connected in parallel. The diode D1 is connected to the power output control module, and the relay S2 is connected to the load.

3. The power drive output protection circuit for an airborne electronic system according to claim 2, characterized in that, The power output monitoring module includes a relay S1, resistors R2 to R5, and a capacitor C1. The diode D1 is connected to the relay S1, resistors R3 and R4 respectively. The relay S1 is connected to the load, resistors R2 and R5 respectively. The resistor R4 is connected in series with the capacitor C1 so that the power drive signal charges the capacitor C1 through the resistor R4, and the stored charge in the capacitor C1 is released through the resistor R3. One end of each of the resistors R2, R3, R5 and the capacitor C1 is grounded.

4. The power drive output protection circuit for an airborne electronic system according to claim 3, characterized in that, The load includes a relay S3, an LED1, and a resistor R1. Relays S1 and S2 are respectively connected to relay S3 and LED1. LED1 and resistor R1 are connected in series. The other ends of relay S3 and resistor R1 are respectively grounded.

5. The power drive output protection circuit for an airborne electronic system according to claim 4, characterized in that, The relays S1 and S2 are solid-state relays.

6. The power drive output protection circuit for an airborne electronic system according to claim 4, characterized in that, The relay S4 is used to control the input state of the original power drive signal, and the relay S3 is used to control the load state.

Images