Simultaneous self test of multiple inverters in an AC motor syst

Details Simultaneous self test of multiple inverters in an AC motor syst Simultaneous self test of multiple inverters in an AC motor syst

1996-04-08

2000-06-20

Karlsen, Ernest

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 731, 324771, G01R 3102, G01R 3142

Patent

active

060781734

ABSTRACT:
A method for simultaneous testing of individual components in multiple three phase inverters, each connected to a common source of direct current electric power and being coupled to supply power to a respective one of a plurality of three phase loads, involves the steps of monitoring the voltage applied to the inverters and the current at each output phase terminal while gating each switching device in each inverter momentarily into conduction in sequence from a first switching device in a first phase to a last switching device in a third phase until an input voltage drop or an output current is detected. In response to a detected voltage drop, the sequence of gating is interrupted and advanced forward to the next occurring phase. If phase current is detected in any phase during gating, the inverter generating the current is disabled. The gating sequence is modified after detection of a voltage drop to initiate subsequent gating at a phase following the phase at which the voltage drop was detected to prevent inadvertent gating of short-circuited phases.

REFERENCES:
patent: 4056776 (1977-11-01), Olsson et al.
patent: 4392175 (1983-07-01), Takigami et al.
patent: 4471301 (1984-09-01), Durov et al.
patent: 4600917 (1986-07-01), Seki et al.
patent: 4633241 (1986-12-01), Casteel et al.
patent: 4659983 (1987-04-01), Jacob
patent: 4674023 (1987-06-01), Peppel et al.
patent: 4884025 (1989-11-01), Hausler
patent: 5168439 (1992-12-01), Kumar et al.
patent: 5223821 (1993-06-01), Poe et al.
patent: 5262691 (1993-11-01), Bailey et al.
patent: 5266891 (1993-11-01), Kumar et al.
patent: 5363039 (1994-11-01), Kumar et al.

Affiliated with

Also associated with

Rating

Simultaneous self test of multiple inverters in an AC motor syst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Simultaneous self test of multiple inverters in an AC motor syst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous self test of multiple inverters in an AC motor syst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1856032