Variable frequency motor starting system and method

Details Variable frequency motor starting system and method Variable frequency motor starting system and method

1999-05-04

2000-11-21

Masih, Karen

Electricity: motive power systems

Battery-fed motor systems

318732, 318705, 318719, 318722, 318827, H02P 500

Patent

active

061507768

ABSTRACT:
A variable frequency motor starting system has a variable frequency AC power supply for generating an AC power output signal applied to an AC motor. A controller is coupled to the variable frequency AC power supply for producing a control signal for adjusting the frequency of the AC power output signal produced. Upon initially applying power to an AC motor or detection of a starting current for an AC motor, the controller adjusts the frequency of the power output signal applied to the AC motor. The frequency of the power output signal is adjusted to a value below the value of the typical operating frequency. The value of the frequency can be increased to the final operating value.

REFERENCES:
patent: 4471196 (1984-09-01), Frank et al.
patent: 4812730 (1989-03-01), Nakagawa et al.
patent: 5162718 (1992-11-01), Schroeder
patent: 5777459 (1998-07-01), Bansal et al.

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