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High-precision four-quadrant source load device

A four-quadrant, high-precision technology, applied in the direction of output power conversion devices, high-efficiency power electronic conversion, instruments, etc., can solve the problems of switching out of gear and relay ignition and damage, and achieve the effect of improving reliability and eliminating operation risks

Pending Publication Date: 2021-03-05
BEIJING DAHUA RADIO INSTR FACTORY
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Problems solved by technology

However, the reverse pole technology has the risk of switching off gear and relay ignition and damage, and the reliability is challenged to a certain extent.

Method used

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  • High-precision four-quadrant source load device
  • High-precision four-quadrant source load device

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specific Embodiment

[0027] Such as figure 1 As shown, the form of power amplifier paired tubes is used to realize the function of continuous zero-crossing bipolar adjustment, that is, a pair of NPN bipolar transistor and a PNP bipolar transistor is used for power output, and the two transistors use the baseline The same control signal is used for emitter output. Since the conduction characteristics of the NPN tube and the PNP tube are opposite, the push-pull operation of the two power tubes can be guaranteed. In terms of control, only the control baseline of the power pair tube can be controlled to realize the simultaneous control of the conduction state of the two tubes.

[0028] In this unit, the power tube is the core component, so the selection of the power tube should be paid attention to, mainly in the following aspects:

[0029] Since the power pair tube works in the amplification area, it is hoped that the amplification area of ​​the power tube is as large as possible, and the DC current...

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Abstract

The invention discloses a high-precision four-quadrant source load device, which comprises a power amplifier geminate transistor consisting of an NPN type bipolar transistor and a PNP type bipolar transistor. The two bipolar transistors use the same control baseline. The control base line is connected with a three-stage amplification circuit, an NPN type transistor 2SC1845 and a PNP type transistor 2SA992 are used as a first-stage power amplification circuit, an NPN type transistor 2SC4027 and a PNP type transistor 2SA1552 are used as a second-stage power amplification circuit and a third-stage power amplification circuit, and two 1n4148 diodes are used as modulation diodes of main control signals. Bidirectional voltage and current output is realized, and a four-quadrant working mode of integrating output power and absorption power is realized; a control modulation scheme of a diode is adopted to control a power control tube, so that continuous zero-crossing output is realized; and a soft switch control scheme is adopted, so that the reliability and safety of the device are realized.

Description

technical field [0001] The invention relates to a testing device for energy storage products such as batteries and supercapacitors, in particular to a high-precision four-quadrant source-carrying device. Background technique [0002] Energy storage products such as batteries and supercapacitors have been increasingly used as power supply units in industries such as aerospace and defense, consumer electronics, computers and peripherals, communications, semiconductors, and automotive electronics. Therefore, not only the charging characteristics, but also the discharging characteristics need to be tested in the process of R&D and maintenance of such products. Simply measuring the steady-state index may not be able to screen the product well, and a transient load test is also required to evaluate its DC output characteristics. At present, there is no relevant test device that can meet the test requirements. [0003] At present, it is difficult to find a high-power, four-quadra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158Y02B70/10
Inventor 石亚昆赵佳鹤牛光辉
Owner BEIJING DAHUA RADIO INSTR FACTORY
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