Patent · US Expired

Trigger circuit with blocking protection device for a collectorless DC motor

US5162710A · kind A · utility

8Cited by

8References

10Claims

0Family size

Assignee

ebm Elektrobau Mulfingen GmbH & Co. · DE

Inventors

Wilhelm Reinhart · Schrozberg, DE
Helmut Lipp · Assamstadt, DE
Karl-Heinz Schultz · Krefeld, DE

Key dates

Filing date	Jul 5, 1991
Grant date	Nov 10, 1992
Priority date	—
Expiry date	Jul 5, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S388/934
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention pertains to a control circuit for a collectorless DC motor where at least one power transistor (14, 16) is input-connected to each stator coil (2, 4) of the motor; said transistor is driven by at least one rotor position sensor, especially a Hall generator having commutation circuits to commute the motor current, and where a blocking protection device is provided to interrupt the motor current in an overload or blockage. The blocking protection device (26) has at least one semiconductor circuit (30) carrying the motor current which is switched through or blocked depending on its temperature.

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