Control apparatus for induction motor and electric rolling stock

Details Control apparatus for induction motor and electric rolling stock Control apparatus for induction motor and electric rolling stock

1991-04-17

1993-09-28

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318 52, H02P 546

Patent

active

052489264

ABSTRACT:
A control apparatus for an electric rolling stock makes it possible to use a single associated train in a variety of transit services including an express transit service to an accommodation train service. The apparatus comprises an induction motor controlled by an inverter. For an express transit operation (over a long inter-station distance), the ratio of output voltage and the frequency of the inverter is decreased to thereby increase a command current in a variable voltage/variable frequency region. For the accommodation train operation (over short inter-station distance), a control pattern reverse to the above is adopted. The electric rolling stock can adapt itself to the running conditions. Besides, the problem of overheating of the induction motor can be solved successfuly.

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