Method and apparatus for controlling fan motor

Details Method and apparatus for controlling fan motor Method and apparatus for controlling fan motor

2005-11-22

2005-11-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S807000

Reexamination Certificate

active

06967453

ABSTRACT:
A method and an apparatus for controlling a fan motor which is arranged to arranged to cool an object to be cooled and to be controlled by an inverter whose output is connected to the fan motor. The method of the invention comprises steps of determining the temperature of the object to be cooled or a variable proportional to the temperature to form a control variable, controlling the frequency of the inverter output voltage on the basis of the control variable, and controlling the effective value of the inverter output voltage on the basis of the control variable.

REFERENCES:
patent: 4763347 (1988-08-01), Erdman
patent: RE35124 (1995-12-01), Erdman et al.
patent: 6118239 (2000-09-01), Kadah
patent: 6211635 (2001-04-01), Kambe et al.
patent: 6262549 (2001-07-01), Yang et al.
patent: 6316895 (2001-11-01), Ramarathnam
patent: 2 121 557 (1983-12-01), None

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