Method for detecting faulty operation of gas blower driven by DC motor

A technology of DC motors and electric motors, which is applied in the direction of motor control, motor generator testing, and transmission machinery dedicated to glass blowing machines. It can solve problems such as increased bearing friction, decreased magnet strength, and weakened magnetic field to prevent excessive heating. , reducing the effect of the application

Active Publication Date: 2020-09-15
EBM PAPST LANDSHUT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first group of such influencing factors is based on defects in DC motors such as miscommutation, loss of magnet strength on the rotor over the entire service life, field weakening due to heating of the win

Method used

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  • Method for detecting faulty operation of gas blower driven by DC motor
  • Method for detecting faulty operation of gas blower driven by DC motor
  • Method for detecting faulty operation of gas blower driven by DC motor

Examples

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Example Embodiment

[0022] Figure 1 to Figure 3 The diagrams respectively show the fan characteristic curve and the equipment characteristic curve of the gas fan formed as a radial fan when various types of defects as influencing variables occur, where the ordinate is the boost dp and the abscissa is the delivery volume flow Vpkt.

[0023] figure 1 A schematic diagram exemplarily shows the defect that the air density changes. The device characteristic curve 10 (also called "system characteristic curve") is simply assumed to be constant. In addition, the reference characteristic curve 30 and the smaller air density characteristic curve 40 are respectively illustrated as reference variables at a constant rotation speed N.

[0024] figure 2 Shows the rising pressure loss based on system-related defects (such as blocked exhaust pipes on heating boilers or dirty heat exchangers). The system-related defects make the nominal equipment characteristic curve 10 change when the gas fan starts with the heating ...

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PUM

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Abstract

The invention relates to a method for detecting faulty operation of a gas blower driven by an electronically commutated DC motor. The DC motor of the gas blower is controlled by an integrated motor electronic component, wherein the electrical current draw, required in operation to reach a predetermined blower speed of the gas blower, of the DC motor is measured as a measured variable via the motorelectronic component, wherein the motor electronic component performs a plausibility check of the measured electrical current draw, compares the measured value of the electrical current draw, at a predetermined blower speed, with a current draw reference value characteristic curve stored in the motor electronic component, and issues a warning and/or an error code based on deviation of the measured value of the electrical current draw beyond a tolerance range around the reference characteristic curve.

Description

technical field [0001] The invention relates to a method for detecting faulty operation of a gas blower driven by an electronically commutated DC motor using a motor electronics module. Background technique [0002] Heating boilers use gas fans to deliver a load-dependent quantity of gas-air mixture to the burners of the heating boiler. Among them, there are many influencing factors that will cause the gas mixture fan to operate outside the rated range. [0003] The first group of such influencing factors is based on defects in DC motors such as miscommutation, loss of magnet strength on the rotor over the entire service life, field weakening due to heating of the windings or magnets, or undervoltage. Furthermore, the second group is the defects formed due to the increased friction of the bearings of the rotor or the interfering bodies that damage the fan impeller the existing defects. A third group of influencing factors are those based on changed aerodynamic properties...

Claims

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Application Information

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IPC IPC(8): G01R31/34H02P29/024F04D27/00F04D25/06
CPCG01R31/343H02P29/027F04D27/001F04D25/06G01R31/56C03B9/41G01R19/0092
Inventor M·魏因加特B·西蒙
Owner EBM PAPST LANDSHUT
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