VEHICLE POWER SHARING AND GRID CONNECTION SYSTEM FOR ELECTRIC MOTORS AND DRIVES

摘要

A power sharing system for electric motors and drives shares power between multiple power sources. Multiple motor drives share power between multiple energy sources, without the need for a DC to DC converter. A motor drive adapts the DC voltage range of the power source to either AC voltage or a different DC voltage range to operate one or more electric motors. Either a capacitor bank or a battery is directly connected to a motor drive's DC input. Two separate DC inputs exist, each able to operate at its own voltage and both feeding the same motor through separate motor drives, to allow batteries to be operated at one voltage level while capacitors are operated at another. The motor drives inherently cause power to flow between the motor and either power source, regardless of the relative voltages of the two sources, provided that each source is at a sufficient voltage to power the motor independently.

主权项

1. Apparatus for sharing electric power between multiple energy sources in a vehicle or machine comprising:
a power sharing system for electric motors and drives sharing power between multiple power sources; multiple motor drives sharing power between multiple energy sources to operate without a DC to DC converter; one or more motor drives adapting DC voltage range of a power source to at least one of AC voltage or a DC voltage range to operate at least one electric motor; at least one of a capacitor bank or a battery directly connected to the input of each said motor drive; each input at its own voltage and each motor drive said at least one electric motor, to allow batteries to be operated at one voltage level while capacitors are operated at another voltage level; a controller containing basic operational parameters and providing an interface to the vehicle or machine, whereby said controller matches varying torque demands of said electric motor with available power from said power sources; said motor drives causing power to flow between said one or more motor drives and said multiple power sources, regardless of the relative voltages of said power sources, provided that each power source is at a sufficient voltage to power the said at least one electric motor independently.