Device for detecting rotor speed or position in a continuously e

Details Device for detecting rotor speed or position in a continuously e Device for detecting rotor speed or position in a continuously e

1998-03-19

2000-07-18

Martin, David S.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

310 68R, 310154, G05B 106

Patent

active

060912200

ABSTRACT:
In an electric motor, a Hall sensor (3) is arranged in the vicinity of the outer circumference of the rotor (2) and of at least one of the permanent magnets (4-7) provided for operationally exciting the electric motor. At least one of the permanent magnets (4-7) is provided for generating the magnetic field inducing the Hall sensor (3). The rotor (2) has rotor teeth (2.1) and/or rotor slots (2.2) on the air-gap side and, in operation, produces magnetic field pulsations in proportion to the rotor speed.

REFERENCES:
patent: 4438362 (1984-03-01), Brown
patent: 4535275 (1985-08-01), Muller
patent: 5164622 (1992-11-01), Kordik
patent: 5241267 (1993-08-01), Gleixner et al.
patent: 5404673 (1995-04-01), Takeda et al.
patent: 5436539 (1995-07-01), Wrenbeck et al.
patent: 5659217 (1997-08-01), Petersen
Schiefer, Integrierte Differenz-Hall--IC zur Positions- und Drehzahlerkennung, Elektronik Informationen, No. 5 (May 1995), pp. 96, 98, 100, (No Translation).

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