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Direct current brushless motor overload current calculation method and protection device

A brushless DC motor, overload current technology, used in emergency protection circuit devices, measuring devices, measuring current/voltage and other directions, can solve problems such as unpredictable, inaccurate overload current, current fluctuations, etc. Accurate calculation of the effect of overload currents

Pending Publication Date: 2022-01-11
无锡金田电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, because the current when the motor stalls is fluctuating and unstable, the overload current determined by this measurement is inaccurate and often fails to meet expectations.

Method used

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  • Direct current brushless motor overload current calculation method and protection device
  • Direct current brushless motor overload current calculation method and protection device
  • Direct current brushless motor overload current calculation method and protection device

Examples

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Embodiment Construction

[0030] Specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0031] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0032] Such as figure 1 As shown, the brushless DC motor overload current calculation method of the present invention comprises the following steps:

[0033] S1: Connect to Advantech industrial computer: AIMC-3200-00A1E+PCIE1816 acquisition card, sampling rate setting: 100KHz, power on the brushless DC motor and make it work normally, and then block the DC with an obstacle (wooden stick) The brushless motor makes it stop rotating, and collects 50,000 current data samples in ...

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PUM

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Abstract

The invention relates to a DC brushless motor overload current calculation method. The method specifically comprises the following steps: S1, collecting a current data samples; s2, randomly selecting b samples from the collected current data samples; s3, sorting the randomly selected current data samples according to the magnitude of current; s4, removing c samples with the maximum current from the sorted current data samples; s5, taking d samples with the maximum current from the remaining sorted current data samples; s6, calculating the current average value of the d samples. The method has the advantages that the overload current of the brushless DC motor can be accurately calculated, the performance of the brushless DC motor is effectively exerted, and the overload protection function is effectively started.

Description

Technical field: [0001] The invention relates to the technical field of DC brushless motors, in particular to a calculation method and a protection device for the overload current of DC brushless motors. Background technique: [0002] A brushless DC motor is a device that converts DC electrical energy into mechanical energy. DC brushless motors are divided into DC brushless motors and DC brushed motors. Brushless DC motors are based on power switch technology and permanent magnet synchronous technology, and use Hall sensors to transmit the position of the rotor. They have no brushes, no interfaces, no noise, and long service life, so they are widely used. [0003] In order to prevent damage to the brushless DC motor due to excessive current, an overload protection function is generally added. When a certain current (overload current) is exceeded, the power supply is cut off to protect the brushless DC motor from damage. How to determine the appropriate overload current and...

Claims

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Application Information

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IPC IPC(8): G01R19/165G01R19/25H02H7/085
CPCG01R19/16528G01R19/25H02H7/0854
Inventor 吴铁山
Owner 无锡金田电子有限公司
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