Power supply on-load test module with energy recovery function

Abstract

The utility model relates to a power supply on-load test module with energy recovery, which comprises an input end and an output end of a DUT, and further comprises a PSU power supply, a dual-active OR-ing power supply circuit, a buck converter and a buck-boost converter, the PSU power supply is sequentially connected with the dual-active OR-ing power supply circuit and the buck converter, power is output to the input end of the DUT, and the dual-active OR-ing power supply circuit is connected with the buck-boost converter. The output end of the DUT is connected to the buck-boost converter through an energy recovery input line, the buck-boost converter is connected to the dual-active OR-ing power supply circuit in parallel, and the module is further provided with a DAC module used for controlling parameters of voltage and current output by the converter and an ADC module used for reading back and monitoring changes of the output end of the DUT and monitoring parameters of energy recovery. Compared with the prior art, energy can be saved, waste can be avoided, use of instruments can be reduced, testing efficiency is higher, a testing system is simplified, efficiency is improved, meanwhile, expensive instruments are not needed, testing cost and jig cost are reduced, and enterprise cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply test technical field especially relates to a power supply with energy recovery's belt load test module. BACKGROUND

[0002] The stability of the power supply determines the service life of a product, many products will separate the power supply part, such as white goods, digital products, new energy buses, etc., are all independent power supply boards, power distribution boards, ATX power supplies, mainly worry about power failure, affect the operation of the whole system, it shows that the stability of the power supply is extremely important, verifying the stability of the power supply is very important, and it provides a strong basis for the design and production of electronic products, mainly verifying the performance of the power supply will test its load capacity and other performance under no load and different load conditions, heat dissipation; For the commonly used scheme in the field, either directly on the electronic load instrument, which is not only expensive, but also makes the size of the test fixture very large, or the board card is designed to simulate different loads, which is a direct method of consuming energy, one is waste, two is to install a cooling fin, and the heat is not timely dissipated, which will affect the stability of the circuit and the stability of the whole test system, compared with the two schemes, the energy recovery scheme can improve their shortcomings, therefore, a power supply module with load test and energy recovery is proposed. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a kind of power module with load test and energy recovery.

[0004] To achieve the above object, the utility model provides the following technical scheme.

[0005] A kind of power supply with energy recovery's belt load test module, including the input end and output end of DUT, module further includes PSU power supply and double active OR-ing power supply circuit, further including buck converter and boost-buck converter, PSU power supply is connected double active OR-ing power supply circuit and buck converter in turn, power supply output is on the input end of DUT, DUT output end is connected on boost-buck converter via energy recovery input line, boost-buck converter is connected to double active OR-ing power supply circuit in parallel, module is further provided with the DAC module for controlling the voltage, current parameters of the output of buck converter and boost-buck converter, module is further provided with the ADC module for back reading and monitoring the change of DUT output end, and monitoring the parameters of energy recovery.

[0006] Preferably, DAC module includes digital analog converter and error amplifier;

[0007] The digital-to-analog converter is connected to the step-down converter through a product input voltage control line;

[0008] The digital-to-analog converter is connected to the step-up / down converter through a conversion current control circuit and a conversion voltage control circuit via an error amplifier.

[0009] Preferably, the error amplifier is also connected in a line between the double active OR-ing power supply circuit and the step-up / down converter.

[0010] Preferably, the ADC module comprises an analog-to-digital converter.

[0011] The analog-to-digital converter is connected to the energy recovery input line through a DUT voltage detection circuit and a DUT current detection circuit.

[0012] The analog-to-digital converter is connected in a line between the double active OR-ing power supply circuit and the step-up / down converter through a conversion voltage detection circuit and a conversion current detection circuit.

[0013] The utility model discloses the advantages of:

[0014] The utility model provides a power supply load test energy recovery scheme, relative with prior art, to the larger power test can save energy, avoid waste, can reduce the use of instrument, and test efficiency is higher, simplifies the test system, improves the efficiency, and need not the expensive instrument simultaneously, reduces the test cost, reduces the fixture cost, is favorable to reducing the enterprise cost.

[0015] The DAC module and the ADC module can mainly control and adjust the voltage and current parameters of the output of the buck converter and the buck / boost converter, read back and monitor the changes of the output end of the DUT, and monitor the parameters of the energy recovery, so that the operator can adjust according to the actual situation of the detection object, and has great adaptability.

[0016] Meanwhile, the present scheme has no excessive heat dissipation requirement due to the design of electric energy recovery, and increases the stability of the test system. DRAWINGS

[0017] Figure 1 The utility model discloses a circuit connection schematic diagram. EMBODIMENT

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Referring to Figure 1 The embodiment provides a power supply load test module with energy recovery, which comprises an input end and an output end of a DUT, further comprises a PSU power supply and a dual active OR-ing power supply circuit, further comprises a buck converter and a buck / boost converter, the PSU power supply is sequentially connected with the dual active OR-ing power supply circuit and the buck converter, and the power supply output is connected to the input end of the DUT; the output end of the DUT is connected to the buck / boost converter through an energy recovery input circuit, the buck / boost converter is connected in parallel to the dual active OR-ing power supply circuit, and the module is further provided with a DAC module for controlling and adjusting the voltage and current parameters of the outputs of the buck converter and the buck / boost converter, and further provided with an ADC module for reading back and monitoring the changes of the output end of the DUT and monitoring the parameters of the energy recovery.

[0020] Preferably, the DAC module comprises a digital analog converter and an error amplifier.

[0021] The digital analog converter is connected to the buck converter through a product input voltage control circuit.

[0022] The digital analog converter is connected to the buck / boost converter through a conversion current control circuit and a conversion voltage control circuit and an error amplifier.

[0023] Preferably, the error amplifier is further connected in parallel to the connecting circuit between the dual active OR-ing power supply circuit and the buck / boost converter.

[0024] Preferably, the ADC module comprises an analog-digital converter.

[0025] The analog-digital converter is connected to the energy recovery input circuit through a DUT voltage detection circuit and a DUT current detection circuit.

[0026] The analog-digital converter is connected to the connecting circuit between the dual active OR-ing power supply circuit and the buck / boost converter through a conversion voltage detection circuit and a conversion current detection circuit.

[0027] In the embodiment, the DAC module has a setting function, and the ADC module has a reading back function.

[0028] The PSU power supply adopts a relatively economical and practical switching power supply, and expensive power supply instruments do not need to be purchased, and therefore a first buck converter is added to adjust the voltage output to the DUT to be tested again, so that the cost is reduced.

[0029] The double active OR-ing power supply circuit has multiple advantages in power management and redundancy design in the embodiment, improves system reliability, redundancy design, and the double active OR-ing power supply circuit allows multiple power supplies to be connected in parallel, and can directly provide recovered energy to an input end.

[0030] The buck converter is mainly used for adjusting an output voltage, and a suitable buck chip is selected according to the requirement of a power supply circuit.

[0031] The buck / boost converter can convert a test power supply required by the DUT under load back to the double active OR-ing power supply circuit again, and different voltages and currents can be controlled through the DAC module, so that the DUT power supply under different loads can be tested, and the change of the output end of the DUT is detected through the double active OR-ing power supply circuit.

[0032] The error amplifier is arranged, and is used for adjusting the output voltage and current of the buck / boost converter, and has the characteristics of high precision, fast response and fast adjustment.

[0033] The above is a detailed description of the utility model in combination with specific embodiments, and the specific implementation mode of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, a number of equivalent substitutions or obvious modifications can be made without departing from the concept of the utility model, and the same performance or use is achieved, and all should be regarded as belonging to the patent protection range determined by the submitted claims of the utility model.

Claims

1. A power supply load testing module with energy recovery, comprising an input and an output of a DUT, the module further comprising a PSU power supply and a double active OR-ing power circuit, characterized in that: The voltage regulator and the buck-boost converter are also included; The PSU power supply is connected with the double active OR-ing power supply circuit and the voltage regulator in sequence, and the power output is output to the input end of the DUT; The output end of the DUT is connected with the buck-boost converter through the energy recovery input circuit, and the buck-boost converter is connected with the double active OR-ing power supply circuit in parallel; The DAC module for controlling and adjusting the voltage and current parameters of the output of the voltage regulator and the buck-boost converter is also arranged on the module; The ADC module for reading back and monitoring the changes of the output end of the DUT and monitoring the parameters of the energy recovery is also arranged on the module.

2. The power-on test module with energy recovery of claim 1, wherein: The DAC module includes a digital-to-analog converter and an error amplifier; The digital-to-analog converter is connected with the voltage regulator through the product input voltage control circuit; The digital-to-analog converter is connected with the buck-boost converter through the conversion current control circuit and the conversion voltage control circuit via the error amplifier.

3. The power-on test module with energy recovery of claim 2, wherein: The error amplifier is also connected with the connection circuit between the double active OR-ing power supply circuit and the buck-boost converter.

4. The power-on test module with energy recovery of claim 3, wherein: The ADC module includes an analog-to-digital converter; The analog-to-digital converter is connected with the energy recovery input circuit through the DUT voltage detection circuit and the DUT current detection circuit; The analog-to-digital converter is connected with the connection circuit between the double active OR-ing power supply circuit and the buck-boost converter through the conversion voltage detection circuit and the conversion current detection circuit.

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