Brushless motor and an axial flow fan with the brushless motor

Details Brushless motor and an axial flow fan with the brushless motor Brushless motor and an axial flow fan with the brushless motor

1990-09-25

1992-03-03

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388934, 318808, H02P 5165

Patent

active

050938916

ABSTRACT:
A brushless motor comprises a rotor having multipolar magnets magnetized, a stator coil having a plurality of phases of winding, a rotor position detecting circuit to detect a specified position of the rotor and to output a signal having levels which alternately change in accordance with revolution of the rotor, and a phase changing circuit to output driving signals to the stator coil in accordance with the output of the rotor position detecting circuit, a stop time signal generating circuit to output a drive-stop signal for stopping the actuation of the stator coil for a predetermined time from the time when a level of the output signal of the rotor position detecting circuit is changed, a temperature detecting element to detect the temperature of an object to be cooled, an instruction value generating circuit to output to the stop time signal generating circuit an instruction signal in response to the output of the temperature detecting circuit so as to change the specified time, and an overheat detecting circuit to output an overheat alarm signal when the temperature detecting element detects a temperature exceeding the predetermined temperature.

REFERENCES:
patent: 4035692 (1977-07-01), Luy et al.
patent: 4665350 (1987-05-01), Angi et al.
patent: 4667480 (1987-05-01), Bessler
patent: 4722669 (1988-02-01), Kundert
patent: 4755728 (1988-07-01), Ban
patent: 4883982 (1989-11-01), Forbes et al.

Affiliated with

Also associated with

Rating

Brushless motor and an axial flow fan with the brushless motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Brushless motor and an axial flow fan with the brushless motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brushless motor and an axial flow fan with the brushless motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-277671