Patent · US Active

Method and system for heating of robots in cold environments

US8618759B2 · kind B2 · utility

0Cited by

5References

8Claims

0Family size

Assignee

ABB AG · US

Inventors

Sönke Kock · Hagfors, SE
Jens Hofschulte · Lehrte, DE

Key dates

Filing date	Jul 31, 2012
Grant date	Dec 31, 2013
Priority date	—
Expiry date	Jul 31, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02P29/62
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A method and system are disclosed for heating of robots in cold environments, whereby the robot possesses permanent magnet brushless or three-phase synchronous motors with three motor phases including three stator coils (L1, L2, L3) connected to an inverter controllable by a control-unit and with a rotor with permanent magnet excitation. A current can be applied to at least one phase of the stator coil (L1, L2, L3) of the motor such that, if the motor stands still, a directed magnetic flux (Φ) is created which interacts with the permanent magnets of the rotor in such a way that the resulting torque will be close to zero.

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