Method and apparatus for controlling electric motor

Details Method and apparatus for controlling electric motor Method and apparatus for controlling electric motor

2008-08-05

2010-12-28

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S799000, C318S471000

Reexamination Certificate

active

07859207

ABSTRACT:
A method for controlling a motor current supplied to an electric motor by using an inverter device is provided. The inverter device includes an inverter circuit and a capacitor connected to an input of the inverter circuit. The method includes controlling the inverter circuit in such a manner as to supply an alternating electric current to the electric motor after the temperature of the capacitor reaches a temperature at which a maximum acceptable motor current value becomes greater than or equal to a value at which the torque necessary for starting the electric motor is produced.

REFERENCES:
patent: 5334923 (1994-08-01), Lorenz et al.
patent: 6678174 (2004-01-01), Suzui et al.
patent: 2003/0006738 (2003-01-01), Duff, Jr.
patent: 2007/0152624 (2007-07-01), Hamaoka et al.
patent: 6038543 (1994-02-01), None

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