Starting of synchronous machine without rotor position of speed

Details Starting of synchronous machine without rotor position of speed Starting of synchronous machine without rotor position of speed

1995-08-04

1998-10-06

Sircus, Brain

Electricity: motive power systems

Positional servo systems

'reset' systems

318705, 318717, H02P 146

Patent

active

058181920

ABSTRACT:
A system for starting synchronous motor from a pulse-width-modulated static inverter without using rotor position or speed measurements. The system monitors supply current to the stator and derives a relationship between that current and the magnetizing flux. The system utilizes a narrowband filter that is tuned to pass only the motor currents fundamental component and whose tuned frequency changes with variations in motor speed. Furthermore, the system reduces the excitation provided to the motor after a certain value of line voltage is sensed.

REFERENCES:
patent: 3630496 (1971-12-01), Hurst et al.
patent: 3845372 (1974-10-01), Ringland et al.
patent: 4039909 (1977-08-01), Baker
patent: 4321478 (1982-03-01), Plunkett et al.
patent: 4361791 (1982-11-01), Plunkett
patent: 4371823 (1983-02-01), Lohest
patent: 4443747 (1984-04-01), Chausse et al.
patent: 4463295 (1984-07-01), Musil
patent: 4683411 (1987-07-01), Hamilton Jr. et al.
patent: 4804900 (1989-02-01), Soeda
patent: 4949021 (1990-08-01), Rozman et al.
patent: 4995478 (1991-02-01), Oshima et al.
patent: 5029263 (1991-07-01), Rozman
patent: 5083905 (1992-01-01), Mohn
patent: 5164651 (1992-11-01), Hu et al.
patent: 5315225 (1994-05-01), Heinrich et al.
patent: 5363032 (1994-11-01), Hanson et al.
patent: 5386186 (1995-01-01), Gritter
patent: 5585709 (1996-12-01), Jansen et al.
JP-A-59 096888 (Toshiba K.K.) Jun. 4, 1984.
Patent Abstracts of Japan, vol. 10, No. 228 (E-426), Aug. 8, 1986 & JP-A-61 062387 (Toshiba Corp.), Mar. 31, 1986.
International Publication WO-A-95/17780, Wisconsin Alumni Research Fdtn., Jun. 29, 1995, p. 10, line 13; p. 11, line 10-27, figure 1.

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