System and method for controlling a motor using forced speed control
US7388342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2006 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Dec 9, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/0004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for operating a motor drive unit. The motor drive unit is coupled to a motor driving a load and is configured to selectively control the motor according to a torque control mode and a speed control mode. The motor drive unit includes a circuit configured to generate an operational condition signal indicating an operational condition of the motor and a regulator configured to receive the operational condition signal and generate a motor control signal. The motor drive unit also includes a first controller configured to receive the motor control signal and a reference control signal and select either the motor control signal or the reference control signal to use as a control signal to drive the motor according to either torque control or speed control. The motor drive unit also includes a second controller configured to monitor the operational condition signal and, upon detecting a preliminary indication of a change in the load, bypass the first controller to drive the motor according to the other of torque control or speed control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.