Patent ID: 11955915
Assignee: DANFOSS (TIANJIN) LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 19:
20. The method according to claim 19, wherein the step of controlling the heating power of the winding of the stator according to a phase resistance of the winding of the stator comprises:
detecting a current flowing through windings at two phases which a DC voltage is applied to;
calculating the phase resistance of the winding of the stator of the compressor according to the DC voltage and the current;
determining a temperature of the winding of the stator according to the phase resistance; and
injecting a current into the winding of the stator according to the difference between the determined temperature and a predetermined temperature, in order to make the heating power of the winding of the stator at a desired heating power.