Method and apparatus for resynchronizing a moving rotor of a polyphase dc motor
US5172036A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for resynchronizing the rotor of a polyphase dc motor having "Y" connected stator coils and a moving rotor has circuitry for determining the actual instantaneous position of the rotor, and circuitry for determining a desired rotor position precedent to executing a desired commutation sequence. Circuitry is provided for executing the desired commutation sequence when the circuit for determining the actual instantaneous position of the rotor detects that the rotor is actually in the desired rotor position, and circuitry is provided, responsive to a predetermined resynchronize signal such as an output enable signal, an overtemperature indicating signal, any other signal indicating abnormal operation condition of the motor or the driver circuit, or the like, (1) for inhibiting drive signals to the driving coils, (2) for initiating a resynchronizing routine to synchronize the position of the rotor to the desired commutation sequence, and (3) for reapplying drive signals to the coils after the position of the rotor of the motor has been synchronized with the desired commutation sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.