Power supply circuit for dynamic redundancy control

Abstract

The invention relates to a technology of dynamic redundancy output implementing power supply control and safety design, in particular to a power supply circuit for dynamic redundancy control. The power supply circuit comprises a plurality of normal execution modules, a switch control module, a redundancy execution module and a monitoring module, wherein each normal execution module comprises a relay, and the redundancy execution module comprises a relay; the monitoring module comprises a circuit parameter detection device and a detection signal analysis and judgment device, which are connected with each other; the circuit parameter detection device monitors the circuit parameters of the normal execution modules during working and transmits a detection result to the detection signal analysis device, the detection signal analysis device analyzes and judges the signal to generate a command and sends the command to the switch control module, and the switch control module is switched on and switched off according to the command; the switch control module comprises a switching device which is connected with the redundancy execution module and the detection signal analysis and judgment device. According to the power supply circuit, the cost can be effectively reduced, the size of a circuit board is reduced, and a certain reliability and safety are ensured.

Description

technical field [0001] The invention relates to a technique for implementing power supply control and safety design with dynamic redundant output, and is especially used in occasions where reliability is high, PCB area is small, and cost is sensitive. Background technique [0002] At present, the commonly used power supply control scheme is: first output high and low levels from different output ports of the processor or programmable device, and drive different relays to operate after isolation and drive enhancement through optocouplers. Due to the structural characteristics of the relay, failures are most likely to occur during use. Therefore, in the known methods, static redundant outputs are generally used to realize power supply control. That is, the relay is used as the control actuator, and the two relays jointly complete the output control of one power supply, forming a redundant design. Specifically, it is to connect the output ends of the relays controlled by two o...

AI Technical Summary

Problems solved by technology

[0004] In this method, the reliability of the power supply in each loop is proportional to the number of relays; when there are multiple power supply outputs in the control loop, multiple relays are required, which takes up a lot of PCB space and is expensive, and is not suitable for the PCB area. Occasions that are limited, cost-sensitive and need to ensure power supply reliability

[0005] In addition, this method has a fixed redundancy for each channel, once connected, it cannot be changed

Even if the relays of one channel are faulty and the relays of the other channel are all normal, the normal relays cannot separate their own backup relays to take over the work of the faulty relays, and cannot fully play the role of redundancy

In addition, when one of the channels is faulty or the load is short-circuited and open-circuited, it cannot be identified and recorded, and fault diagnosis cannot be performed.

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