Patent · US Active

Method for detecting an insulation fault in a motor arrangement, method for detecting a motor phase interruption in a motor arrangement, and drive circuit for driving an electronically commutated motor

US11372047B2 · kind B2 · utility

0Cited by

1References

14Claims

0Family size

Assignee

Diehl AKO Stiftung & Co. KG · DE

Inventors

Martin Weinmann · Bad Waldsee, DE
Andreas Schmid · Duisburg, DE
Sebastian Tinius · Achern, DE

Key dates

Filing date	Aug 12, 2019
Grant date	Jun 28, 2022
Priority date	—
Expiry date	Jun 5, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH02P2201/15
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A drive circuit for driving an electronically commutated motor contains a DC voltage intermediate circuit, and an inverter which is connected to the latter and has a bridge circuit containing a plurality of transistors, to which the motor phases of a motor configuration containing the motor can be connected. For detecting an insulation fault in the motor configuration, a positive or negative transistor of the inverter is switched on, while all other transistors of the inverter are switched off before all transistors of the inverter are switched off. A motor phase voltage of a selected motor phase of the motor phases with respect to a reference potential is then captured, while all transistors of the inverter remain switched off in order to determine whether there is an insulation fault on the motor phase on a basis of a voltage profile of the motor phase voltage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.