Frequency converter, motor, motor drive system and...

Details Frequency converter, motor, motor drive system and... Frequency converter, motor, motor drive system and...

2007-04-10

2007-04-10

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S808000, C318S812000, C318S818000

Reexamination Certificate

active

11521486

ABSTRACT:
A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.

REFERENCES:
patent: 4651266 (1987-03-01), Fujioka et al.
patent: 5187652 (1993-02-01), Steimer
patent: 6152699 (2000-11-01), Shikata et al.
patent: 2003/0136976 (2003-07-01), Tanzawa et al.
‘Influence of Insulation of General Motor Driven with 400 V Class Inverter’, The Japan Electrical Manufactures' Association, a corporate juridical person, Mar. 1995.

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