Showing posts with label motor. Show all posts
Showing posts with label motor. Show all posts

Saturday 9 June 2007

Lenz's law

Explain this: I just connected my 1300W vacuum cleaner to a power meter. When running unobstructed it consumes 1100W. When I block the tube so the motor is audibly under more load the power drops to 900W. Power factor remains close to 1. Weird motor?