Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2008-03-25
2008-03-25
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S798000, C318S801000, C318S432000, C318S434000
Reexamination Certificate
active
07348756
ABSTRACT:
An apparatus controls a power converter of an AC motor drive system, the power converter outputting multi-phase AC current to an AC motor. The apparatus comprises: a state selecting unit; and an advanced controller. The state selecting unit selects an operation mode, from among a plurality of operation modes, for the AC motor based on system real-time operating conditions, the plurality of operation modes including a normal mode, a power interruption mode, a fault protection mode, and a power-up/down dynamic mode. The system operating conditions include DC voltage available to the power converter, motor load condition, and motor speed command. The advanced controller controls multi-phase AC current output from the power converter to the motor in accordance with the operation mode selected by the state selecting unit. The advanced controller generates a current control reference value that is based on the selected operation mode to achieve current control under various operating conditions of the motor drive system.
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Ma Jack
Wang Zheng
Zhou George
Birch & Stewart Kolasch & Birch, LLP
Donovan Lincoln
Glass Erick
Honeywell International , Inc.
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