Patent ID: 6118677
Filing Date: 2000-09-12
Classification: H02J,H02M,H02P

Abstract:
A motion control system comprising:an inverter adapted to receive electrical power at a first DC voltage level and selectively provide power to a motor;a first DC--DC converter adapted to receive electrical power at the first DC voltage level and provide electrical power at a second DC voltage level;a second DC--DC converter adapted to receive electrical power at the second DC voltage level and provide electrical power at a third DC voltage level;a controller adapted to receive electrical power at the third DC voltage level and provide control signals to the inverter;secondary input terminals adapted to receive electrical power from a second source; anda switching circuit 36 connected to the secondary input terminals and the second DC--DC 32 converter, the switching circuit blocking power flow between the second source and the second DC--DC converter when the second DC voltage level is above a selected threshold and providing electrical power from the second source to the second DC--DC converter when the second DC voltage level is less than the selected threshold.