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Feedback type alternating-current electronic load used for frequency converter aging test

An aging test, electronic load technology, applied in the direction of measuring electricity, instruments, measuring devices, etc., can solve the problems of increasing the difficulty of filter inductor design, complex current control algorithm, destroying system stability, etc., achieving good scalability and easy programming. Control, reliable performance

Inactive Publication Date: 2014-11-26
SHENZHEN XMOR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the LC filter itself has a resonance problem. Once the filter design and control strategy are not suitable, the stability of the system will be destroyed. At the same time, the filter capacitor will also cause reactive current and cause the current control algorithm to be complicated; and the hysteresis PWM is used. Current control will cause the switching frequency to fluctuate with the change of the current change rate, and the design difficulty of the filter inductor will be greatly increased

Method used

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  • Feedback type alternating-current electronic load used for frequency converter aging test
  • Feedback type alternating-current electronic load used for frequency converter aging test
  • Feedback type alternating-current electronic load used for frequency converter aging test

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Embodiment Construction

[0035] In order to better illustrate the present invention, further description will now be made in conjunction with the embodiments and accompanying drawings.

[0036] The invention is a feedback type AC electronic load for frequency converter aging test. Such as figure 1 Shown is a preferred embodiment of the present invention.

[0037] The present invention includes a device under test A, a first rectification IPM module 1 , a second rectification IPM module 2 and a DSP processor 3 .

[0038] The first rectification IPM module 1 is used for simulating load characteristics, including an AC port, a DC port and a control port.

[0039] The second rectification IPM module 2 is used to feed back the electric energy absorbed by the device under test A to the grid without pollution, including an AC port, a DC port and a control port.

[0040] The DSP processor 3 includes an EVA output port for generating PWM signals and an EVB output port for generating PWM signals.

[0041] T...

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Abstract

The invention discloses a feedback type alternating-current electronic load used for the frequency converter aging test, and relates to an energy-saving type alternating-current power supply device load test device. The feedback type alternating-current electronic load used for the frequency converter aging test comprises a tested device, a first rectification IPM module, a second rectification IPM module and a DSP. The first rectification IPM module is used for simulating the load characteristics and comprises an alternating-current port, a direct-current port and a control port. The second rectification IPM module is sued for feeding electric energy absorbed by the tested device back to a power grid in a pollution-free mode and comprises an alternating-current port, a direct-current port and a control port. The DSP comprises an EVA output port and an EVB output port which are used for generating PWM signals. By means of the feedback type alternating-current electronic load, the real load characteristics can be simulated, and the energy absorbed by the tested device can be fed back to the power grid in the pollution-free mode.

Description

technical field [0001] The invention relates to load testing equipment for an energy-saving AC power supply device, in particular to a load testing equipment for an energy-saving frequency converter. Background technique [0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to change the frequency of the motor's operating power supply to control the AC motor. With the continuous improvement of industrial automation, frequency converters have been used more and more widely. At the same time, the performance requirements of frequency converters are also getting higher and higher. One of the important ways to guarantee the performance of the inverter is to carry out strict tests in the two stages of its design, development and delivery, such as radiator temperature rise test, load aging test and output short circuit protection test. [0003] There are two main types of inverter tests: [0004] ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 宾小泉
Owner SHENZHEN XMOR TECH
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