Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Having electrical synchronizing interconnections
Patent
1994-10-26
1997-06-24
Sircus, Brian
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Having electrical synchronizing interconnections
318 62, 290 40D, B60L 1108
Patent
active
056420200
ABSTRACT:
An electric vehicle control device for a plurality of vehicles connected in series to form a formation including a plurality of control devices, each being provided for one of the vehicles, respectively. Each of the control devices includes a PWM converter device for receiving a first A.C. power through a current collector and a transformer from an A.C. overhead line and for converting the first A.C. power into a D.C. power using a PWM carrier wave, an inverter connected to D.C. output terminals of the PWM converter device for converting the D.C. power into a second A.C. power, and an electric motor connected to A.C. output terminals of the inverter for being driven by the second A.C. power. Phase angles of the PWM carrier waves in the PWM converter devices are determined to be mutually shifted by a predetermined angle, thereby higher harmonics of the PWM carrier waves leaking into the A.C. overhead line are reduced.
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Kabushiki Kaisha Toshiba
Sircus Brian
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