| US 7,468,595 B2 | ||
| System and method of controlling the start-up of an adjustable speed motor drive based sinusoidal output power conditioner | ||
| Kevin Lee, Menomonee Falls, Wis. (US); Jyrki K. Ahlgren, Franksville, Wis. (US); Ian T. Wallace, Whitefish Bay, Wis. (US); and Thomas M. Doring, Grafton, Wis. (US) | ||
| Assigned to Eaton Corporation, Cleveland, Ohio (US) | ||
| Filed on Jul. 26, 2005, as Appl. No. 11/161,200. | ||
| Prior Publication US 2007/0024231 A1, Feb. 01, 2007 | ||
| Int. Cl. H02P 5/34 (2006.01); H02P 7/36 (2006.01); H02P 7/42 (2006.01) | ||
| U.S. Cl. 318—802 [318/801; 318/807; 318/809] | 25 Claims |
| 1. A motor drive configured to supply power to a load and, during start-up, supply power to the load according to a given
V/Hz profile, the motor drive comprising:
an inverter designed to provide power to a load; and
a controller operationally connected to control operation of the inverter, the controller configured to:
cause the inverter to operate at motor drive start-up according to a default V/Hz profile;
receive feedback of load voltage during motor drive start-up and control operation of the inverter to reduce a difference
between load voltage and a desired load voltage;
receive feedback of inverter output current; and if the inverter output current exceeds a threshold,
cause the inverter to operate according to a new V/Hz profile different from the default V/Hz profile; otherwise
cause the inverter to operate according to the default V/Hz profile.
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