Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-11-29
2005-11-29
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S811000, C318S606000, C318S599000, C318S432000
Reexamination Certificate
active
06969968
ABSTRACT:
A carrier wave frequency generating unit9modulates a frequency f of a carrier wave in a triangular shape. Occurrence of drawbacks due to the frequency f of the carrier wave can thereby be prevented. Because the frequency f of the carrier wave can be easily computed and estimated, a delay time of control, which is due to time for computing the frequency or an integration constant of PID control, can be kept to a minimum, and motor efficiency can be prevented from deteriorating. Because a control delay time can be estimated easily, it is possible to prevent carrying out of delay compensation by feed forward, and to prevent the motor efficiency from deteriorating.
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Leykin Rita
McDermott Will & Emery LLP
Nissan Motor Co,. Ltd.
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