COMMUTATION OF AN ELECTROMAGNETIC PROPULSION AND GUIDANCE SYSTEM

• US 20090001907A1
• Filed: 06/27/2007
• Published: 01/01/2009
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: Brooks Automation Ltd. (United Kingdom) (Azenta, Inc.)
• Original Assignee: Brooks Automation Incorporated (Azenta, Inc.)
• Inventors: Hofmeister, Christopher, Hosek, Martin, Moura, Jairo Terra
• Granted Patent: US 8,823,294 B2
• Time in Patent Office: Days
• US Class Current: 318/115
• CPC Class Codes: F16C 2380/26 Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
• CPC Class Codes: F16C 32/0493 integrated in an electrodynamic machine, e.g. self-bearing motor
• CPC Class Codes: F16C 41/008 Identification means, e.g. markings, RFID-tags; Data transfer means
• CPC Class Codes: H02P 2209/07 Trapezoidal waveform
• CPC Class Codes: H02P 6/15 Controlling commutation time

Abstract

A method of commutating a motor includes calculating an adjustment electrical angle, and utilizing the adjustment electrical angle in a common set of commutation equations so that the common set of commutation equations is capable of producing both one and two dimensional forces in the motor.

Claims

1. A method of commutating a motor comprising:

calculating an adjustment electrical angle; and

utilizing the adjustment electrical angle in a common set of commutation equations so that the common set of commutation equations is capable of producing both one and two dimensional forces in the motor.

2. The method of claim 1, wherein the adjustment electrical angle is determined from one or more measured position coordinates of a platen of the motor and desired motor forces in one or more directions.

3. The method of claim 1, further comprising utilizing the adjustment electrical angle in the common set of commutation equations so that the two dimensional forces in the motor include Maxwell forces.

4. The method of claim 1, further comprising utilizing the adjustment electrical angle in the common set of commutation equations so that the common set of commutation equations is capable of producing three dimensional forces in the motor.

5. The method of claim 4, further comprising utilizing the adjustment electrical angle in the common set of commutation equations so that the three dimensional forces in the motor include Maxwell forces.

6. The method of claim 1, further comprising utilizing a winding phase current in combination with the adjustment electrical angle in the common set of commutation equations.