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

US11226379B2 · kind B2 · utility

Assignee

• EBM PAPST LANDSHUT GmbH · DE

Inventors

• Markus WEINGART · Rottenburg am Neckar, DE
• Bernhard SIMON · Regensburg, DE

Key dates

• Filing date: Mar 4, 2020
• Grant date: Jan 18, 2022
• Expiry date: Mar 25, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B9/41
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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 electronic motor control circuit. The electrical current draw, required in operation to reach a predetermined blower speed of the gas blower, is measured. It is measured as a measured variable via the electronic motor control circuit. The electronic motor control circuit performs a plausibility check of the measured electrical current draw. The measured value of the electrical current draw, at a predetermined blower speed, is compared to a current draw reference value characteristic stored in the electronic motor control circuit. Thus, a warning and/or an error code is issued by the electronic motor control circuit. The warning is based on deviation of the measured value of the electrical current draw beyond a tolerance range around the reference characteristic.