Universal application circuit for three-phase, two-phase and single-phase resistance sampling and method

A technology of resistance sampling and resistance, applied in the direction of measuring current/voltage, estimation/correction of motor parameters, electrical components, etc., can solve the problems of high algorithm requirements, high sampling efficiency of three resistances, increased cost, etc., and achieve large selection space Effect

Pending Publication Date: 2021-02-26
GUANGDONG COMM POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Existing patents (such as patent No. CN201820032656.5, CN201610776444.3 or CN201821788055.3, etc.) have described single-resistance and dual-resistance sampling systems. These hardware are all used in one way alone and cannot be used universally.
Generally, the sampling efficiency of three resistors is high, and the requirements for the algorithm are low, but the cost is slightly higher; the sampling efficiency of the single resistor is low, the requirements for the algorithm are high, and the current needs to be reconstructed, but the cost is optimal; and the two resistors are in between.
Manufacturers usually need to make comprehensive selection among them and update and upgrade products, so they generally hope that the hardware can be compatible, so that they can quickly debug and upgrade the software without changing the hardware; When manufacturers want to be compatible with these three application circuits, they need to change the hardware and re-layout the PCB, which not only affects the production time, but also increases the cost.

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  • Universal application circuit for three-phase, two-phase and single-phase resistance sampling and method
  • Universal application circuit for three-phase, two-phase and single-phase resistance sampling and method
  • Universal application circuit for three-phase, two-phase and single-phase resistance sampling and method

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Embodiment Construction

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.

[0042] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are b...

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Abstract

The invention discloses a universal application circuit for three-phase, two-phase and single-phase resistance sampling and a method. The circuit comprises a rectifier bridge which is used for converting an input alternating current into a pulsating direct current, a filtering voltage stabilizing circuit which is used for filtering the direct current and stabilizing the bus voltage of the direct current, an inverter circuit which is used for converting the direct current into alternating current; a sampling circuit which is used for sampling the alternating current; and a sampling amplification circuit which is used for amplifying the voltage obtained by sampling. A universal adaptive structure is adopted in hardware, a user can conveniently switch a three-resistor system, a two-resistor system and a single-resistor system, a PCB does not need to be changed any more; a larger selection space is provided for cost and efficiency under different occasion application conditions; users withdifferent requirements are better met. The circuit and method are more flexible and applicable, and can be widely applied to the technical field of resistance sampling detection.

Description

technical field [0001] The invention relates to the technical field of resistance sampling and detection, in particular to a general application circuit and method for three-phase, two-phase and single-phase resistance sampling. Background technique [0002] Existing patents (such as patent numbers CN201820032656.5, CN201610776444.3 or CN201821788055.3, etc.) have described single-resistance and dual-resistance sampling systems. These hardwares are only used in one way and cannot be used universally. Usually, the sampling efficiency of three resistors is high, and the requirements for algorithms are low, but the cost is slightly higher; the sampling efficiency of single resistors is low, the requirements for algorithms are high, and the current needs to be reconstructed, but the cost is optimal; and the two resistors are in between. Manufacturers usually need to make comprehensive selection among them and update and upgrade products, so they generally hope that the hardware ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/14H02P25/024H02P27/06G01R19/00
CPCG01R19/00H02P23/14H02P27/06H02P2207/05H02P25/024
Inventor 范立荣黄景鹏李怀俊郭海龙张永栋张胜宾王忠文
Owner GUANGDONG COMM POLYTECHNIC
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