Device and method for determining the position of a rotor

Details Device and method for determining the position of a rotor Device and method for determining the position of a rotor

2006-02-07

2006-02-07

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S071000, C702S089000, C318S437000, C324S137000, C331S024000, C331S025000, C341S111000, C341S112000

Reexamination Certificate

active

06996482

ABSTRACT:
The invention relates to a device and a method for determining an electrical starting rotor angle of an electromotor. According to the invention, the electromotor (10) is subjected to an approximately sinusoidal voltage and the corresponding current path (i) that is established is then detected. The electromotor (10) is again subjected to an approximately sinusoidal voltage and again, the corresponding current path (i) is detected. A ratio of a measure of the fundamental wave (I1) and the measure of the first harmonic wave (I2) is then determined from the current paths (i) as a measure of the electrical starting rotor angle (δ).

REFERENCES:
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patent: 5739659 (1998-04-01), Ezuka
patent: 5767635 (1998-06-01), Steffens et al.
Auckland elt al., ‘The Measurement of Transient Changes in Rotor Angle of a Microsynchronous Alternator’, 1981, The Institute of Physics, vol. 14, pp. 51-52.
Kosaka et al., ‘Torque/Current Ratio Improvement of Reluctoance Motor under Consideration of Teeth Design and Current Waveform’, 1997, IEEE Article, pp. 661-666.
Joohn Sheok Kim and Seung Ki Sul : “New Stand-Still Position Detection Strategy . . . ”, IEEE 1994, pp. 364369.
Brunotte, et al: :Detection of the Starting Rotor Angle . . . , EPE 1997, pp. 1250-1253.
N. Locci et al: “Rotor Position Detection . . . ” ELROMA-92, Technical Papers of the Third International Conference on Electrical Rotating Machines, Bombay, India Jan. 15-16, 1992, pp. VIA-60-VIA67.

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