CN205882678U - High -power DCDC converter protection device - Google Patents

Abstract

The utility model relates to a protection device for a high-power DC/DC converter, comprising: two sets of voltage and current sensors, which are respectively located at the input and output ends of the DC/DC converter; the input end of the DC/DC converter is also An electronic switch is provided; a processor module is connected to two sets of voltage and current sensors to respectively collect the voltage and current values of the input and output terminals; when the current is overcurrent or the voltage is overvoltage, the processor module controls the electronic switch to turn off DC/DC converter input; it analyzes and calculates the information collected by the voltage, current, and temperature sensors through the processor module, and then controls the DC/DC protection control, LED, and cooling fan to take corresponding actions; once the converter fails, the The protection device can quickly stop the converter and inform the cause of the converter failure through LED indication, so that maintenance personnel can quickly and accurately find the fault point for maintenance, saving time and effort, and improving work efficiency.

Description

A high-power DC/DC converter protection device

technical field

The utility model belongs to the field of switching power supplies, in particular to a protection device for a high-power DC/DC converter.

Background technique

Due to its small size, light weight and high efficiency, switching power supply has been widely used in communication, network, industrial control and other fields. At present, the technology of switching power supply in terms of small and medium power is relatively mature, and high-power and high-frequency digitalization is the future development direction of switching power supply. For high-power switching power supplies, protection measures are an important part of the design. If there is no reliable protection, once the switching power supply encounters a failure, it may cause unpredictable damage to the power supply itself and the staff. At present, there are many protection measures for high-power switching power supplies, but most of them cannot read their fault information, and can only be searched slowly manually, which is time-consuming and laborious.

Utility model content

The purpose of this utility model is to provide a high-power DC/DC converter protection device, which can monitor the voltage, current and temperature information in the converter in real time, and quickly take protective action and indicate the cause of the fault when it occurs.

In order to solve the above technical problems, the utility model provides a high-power DC/DC converter protection device, including: two sets of voltage and current sensors, which are respectively located at the input and output ends of the DC/DC converter; The input terminal of the DC converter is also provided with an electronic switch; a processor module is connected with two sets of voltage and current sensors to collect the voltage and current values of the input and output terminals respectively; when the current is overcurrent or the voltage is overvoltage, the processing The converter module controls the electronic switch to turn off the input of the DC/DC converter.

Further, the high-power DC/DC converter protection device also includes: a temperature sensor for detecting the internal temperature of the DC/DC converter, and a fan for cooling the DC/DC converter;

The processor module is adapted to control the rotation speed of the fan by generating a PWM signal.

Further, when the processor module detects that the DC/DC converter has input undervoltage, output overcurrent, output overload or continuous overtemperature, it outputs a signal suitable for shutting down the phase-shifting full-bridge control module in the DC/DC converter. control signal.

Further, the processor module is also connected with a CAN transceiver.

Further, the processor module is also connected to an LED fault indicator group.

The beneficial effect of the utility model is that the high-power DC/DC converter protection device of the utility model analyzes and calculates the information collected by the voltage, current and temperature sensors through the processor module, and then controls the DC/DC protection control, LED, The cooling fans act accordingly. Once the converter fails, the protection device can quickly stop the converter and inform the cause of the converter failure through LED indication, so that maintenance personnel can quickly and accurately find the fault point for maintenance, saving time and effort, and improving work efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a functional block diagram of a high-power DC/DC converter protection device of the present invention.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

As shown in Figure 1, the utility model provides a high-power DC/DC converter protection device, including:

Two sets of voltage and current sensors are respectively located at the input and output ends of the DC/DC converter; the input end of the DC/DC converter is also provided with an electronic switch K; a processor module is connected with two sets of voltage and current sensors , to respectively collect the voltage and current values of the input and output terminals; when the current is over-current or the voltage is over-voltage, the processor module controls the electronic switch K to turn off the input of the DC/DC converter.

Specifically, the processor module is suitable to have an A/D port, for example but not limited to MC9S08DZ60. Optionally, the current sensor at the input end is, for example but not limited to, ACS712, and the current sensor at the output end is, for example, but not limited to ACS758. The electronic switch also adopts the switching contacts of the relay, and the coil of the relay is energized or de-energized by the processor module through the drive circuit.

In order to achieve further protection functions, the high-power DC/DC converter protection device also includes: a temperature sensor for detecting the internal temperature of the DC/DC converter (the temperature sensor adopts an NTC thermistor), and a temperature sensor for detecting the DC/DC A fan for cooling the converter; the processor module is adapted to control the speed of the fan by generating a PWM signal.

Preferably, when the processor module detects that the DC/DC converter has input undervoltage, output overcurrent, output overload or continuous overtemperature, the output is suitable for making the DC/DC converter internal phase-shift full-bridge control module ( Such as but not limited to UCC2895) shutdown control signal.

Further, in order to realize remote control, the processor module is also connected with a CAN transceiver, the CAN transceiver adopts TJA1040, the speed is as high as 1MBaud, the standby current is very low, and it can be started remotely through the bus.

The processor module is also connected to a group of LED fault indicator lights, which respectively represent input overvoltage, input overcurrent, input undervoltage, output overcurrent, output overload, and continuous overtemperature. When the DC/DC converter fails, the cause of the failure can be quickly judged according to the information of the indicator light, and the source of the failure can be found, which saves time and effort.

The high-power DC/DC converter protection device has the advantages of strong adaptability and rapid regulation, and can maximize the reliability and efficiency of power supply work.

Inspired by the above ideal embodiment according to the utility model, through the above description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (5)

1. a high power D C/DC converter protecting apparatus, it is characterised in that including:

Two groups of voltages, current sensors, and lay respectively at the input of DC/DC changer, outfan；

The input of described DC/DC changer is additionally provided with electrical switch；

One processor module and two groups of voltages, current sensors are connected, with Gather and input, the voltage of outfan, current value respectively；

When overcurrent or electric voltage over press, described processor module controls electrical switch and turns off the input of DC/DC changer.

High power D C/DC converter protecting apparatus the most according to claim 1, it is characterised in that

Described high power D C/DC converter protecting apparatus also includes: for detecting the temperature sensing of DC/DC changer internal temperature Device, and for the fan that DC/DC changer is dispelled the heat；

Described processor module is suitable to by according to producing pwm signal to control the rotating speed of fan.

High power D C/DC converter protecting apparatus the most according to claim 2, it is characterised in that

Described processor module detects that input undervoltage, output overcurrent, output overloading or lasting excess temperature occurs in DC/DC changer Time, then the control signal that in output is suitable to make DC/DC changer, phase-shifting full-bridge control module is closed.

High power D C/DC converter protecting apparatus the most according to claim 3, it is characterised in that described processor module It is also associated with CAN transceiver.

High power D C/DC converter protecting apparatus the most according to claim 4, it is characterised in that described processor module It is also connected with LED failure display lamp group.