Load and speed sensitive motor starting circuit and method

Electricity: motive power systems – Induction motor systems – Primary circuit control

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C318S727000, C318S739000, C318S755000

Reexamination Certificate

active

11389953

ABSTRACT:
A circuit and method measures main motor winding voltage and detects points in the electromagnetic wave cycle where this voltage “crosses” zero. It also measures auxiliary motor winding voltage. Phase shifts measured in the auxiliary winding are compared as a means for starting and restarting the auxiliary winding. The points in the electromagnetic wave cycle where the current in the auxiliary winding “crosses” zero are detected and compared with a first window pulse that is generated when the main voltage crosses zero. When the zero current crossing points fall outside the first window pulse, the auxiliary winding is disconnected. The points where the voltage in the auxiliary winding “crosses” zero are also detected and compared with a second window pulse that is generated when the main voltage crosses zero. When the zero voltage crossing points fall within the second window pulse, the auxiliary winding is switched back into the circuit.

REFERENCES:
patent: 2005/0074665 (2005-04-01), Spanziante et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Load and speed sensitive motor starting circuit and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Load and speed sensitive motor starting circuit and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load and speed sensitive motor starting circuit and method will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3795544

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.