Robust blower motor startup technique

Details Robust blower motor startup technique Robust blower motor startup technique

2007-10-10

2010-11-16

Benson, Walter (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Motor load, armature or primary or secondary circuit current

C318S563000

Reexamination Certificate

active

07834572

ABSTRACT:
A method for starting a blower motor with a locked rotor condition, the motor having one or more speed settings, each speed setting having a reference voltage and reference current value associated therewith, the method comprising, from a motor off condition, applying the reference voltage to the motor, the reference voltage associated with a desired speed setting; measuring current flowing through the motor to define a measured current value; comparing the measured current value to the reference current value associated with the desired speed setting to determine if a locked rotor condition exists; if a locked rotor condition exists, increasing the motor speed from the desired speed setting until either the output speed is at a maximum speed or the locked rotor condition ceases to exist; and adjusting the motor output speed value to the desired speed setting.

REFERENCES:
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patent: 4665350 (1987-05-01), Angi et al.
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patent: 7038415 (2006-05-01), Nakamura et al.
patent: 2004/0105664 (2004-06-01), Ivankovic
patent: 60199716 (1985-10-01), None

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