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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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 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 existing defects

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

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Embodiment Construction

[0022] Figure 1 to Figure 3 The graphs respectively show the fan characteristic curve and the plant characteristic curve of a gas fan formed as a radial fan in the presence of various defect types as influencing variables, wherein the ordinate is the boost dp, and the abscissa is the delivery volume flow Vpkt.

[0023] figure 1 The disadvantageous case of a change in air density is shown schematically as an example. The plant characteristic curve 10 (also called "system characteristic curve") is simply assumed to be constant. Furthermore, the reference characteristic curve 30 and the lower air density characteristic curve 40 are each represented as a reference variable at a constant rotational speed N.

[0024] figure 2 shows the rising pressure loss due to a system-related defect situation (such as a clogged exhaust pipe on the heating boiler or a dirty heat exchanger) that makes the nominal plant characteristic curve 10 when the gas blower starts with the heating boiler...

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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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