Motor drive system for AC motors

Details Motor drive system for AC motors Motor drive system for AC motors

2006-06-20

2006-06-20

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S800000, C318S802000, C318S809000, C318S810000

Reexamination Certificate

active

07064514

ABSTRACT:
A motor drive system without any portion for directly detecting the rotor position, rotation speed and motor phase currents, capable of realizing a high-performance variable speed drive even at high carrier frequencies. When detecting a current from a DC power supply of an inverter for driving a motor, applied voltages and frequencies to the motor are controlled based on sampled values by sampling a current flowing as intermittent pulses in the vicinity of each power conduction time period.

REFERENCES:
patent: 5686807 (1997-11-01), Kusano et al.
patent: 6556458 (2003-04-01), Ohmura et al.
patent: 6556464 (2003-04-01), Sakai et al.
patent: 1224272 (1999-07-01), None
patent: 2-197295 (1990-08-01), None
patent: 2001-251889 (2001-09-01), None
patent: 2002-272194 (2002-09-01), None
patent: 2002-369574 (2002-12-01), None

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