Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-02-13
2007-02-13
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S503000, C318S801000, C318S803000
Reexamination Certificate
active
11433430
ABSTRACT:
The invention relates to an electric motor drive for operating an alternating-current motor. The electric motor drive comprises a frequency converter for controlling the motor, which frequency converter comprises a rectifier and an inverter implemented using semiconductor switches arranged in a bridge, and an intermediate circuit placed between the rectifier and the inverter and comprising a capacitor. According to the invention, the electric motor drive additionally comprises two regulating units, the first one of which contains an inductor unit provided at the input of the frequency converter and at the same time at the input of the rectifier, the inductors comprised in the unit being connected to each phase; and an intermediate circuit with a low-value capacitor, of the order of 50 μF, while the second one contains an auxiliary switch, to which the supply of electric power is arranged to occur via a safety relay, the auxiliary switch being so connected to selected semiconductor switches of the inverter bridge that the control signal for a selected semiconductor switch will pass via the auxiliary switch when the latter is in a conducting state; and a current measuring unit for measuring and/or monitoring the supply current to the electric motor.
REFERENCES:
patent: 4482031 (1984-11-01), Yoshida et al.
patent: 5825641 (1998-10-01), Mangtani
patent: 6009003 (1999-12-01), Yeo
patent: 6041625 (2000-03-01), Nagai et al.
patent: 6367273 (2002-04-01), Takagi et al.
patent: 6801441 (2004-10-01), Salama
patent: 6850426 (2005-02-01), Kojori et al.
patent: 1037354 (2000-11-01), None
patent: 63064595 (1998-03-01), None
patent: WO-2001158000 (2001-08-01), None
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Translation of ep 1037354 from Google.
Donovan Lincoln
Kone Corporation
McCloud Renata
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