초록 ▼

The system includes a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor with a common control circuit connected to the gate electrodes of the field effect transistors to control the on-off cycle of conduction through the field ef

The system includes a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor with a common control circuit connected to the gate electrodes of the field effect transistors to control the on-off cycle of conduction through the field effect transistors. A plurality of parallel connected power diodes are arranged for reverse connection in parallel with the traction motor to serve as freewheeling diodes. The diodes are physically positioned apart from one another and distributed in position among the field effect transistors and each diode is positioned in a similar manner with a group of associated field effect transistors for ease of transfer of current flow between the diode and the associated field effect transistors.

대표청구항 ▼

An electronic circuit chopper control system for a d.c. traction motor comprising a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor, a common control circuit connected to the gate electrodes of said field effect transistors to

An electronic circuit chopper control system for a d.c. traction motor comprising a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor, a common control circuit connected to the gate electrodes of said field effect transistors to control an on-off cycle of conduction through said field effect transistors, a plurality of parallel connected power diodes arranged for reverse connection in parallel with the traction motor to serve as freewheeling diodes, said diodes being physically positioned apart from one another and distributed in position among said field effect transistors and each diode being positioned in a similar manner with a group of associated field effect transistors for ease of transfer of current flow between the diode and the associated field effect transistors.