Method for controlling or regulating the current in a direct current machine for a fan
US6967459B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2001 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Aug 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method of regulating the current in a direct current machine with which are associated an arrangement for generating a current target value signal, as well as a PWM generator (FIG. 11: 182) whose output signal (PWM2) is controllable by means of a control signal (u—156) and controls the current in the direct current machine, having the following steps: a) the pulse duty factor of the PWM generator is controlled with the control signal (u—156); b) with the output signal (PWM2) of the PWM generator, the current in the direct current machine is controlled in such a way that a pulsed direct current (i—2; i—2′) is obtained in a supply lead thereof; c) a pulsed current-dependent signal (u—2) is derived from this pulsed direct current (i—2; i—2′) and is compared to the current target value signal (PHI1); d) as a function of the result of that comparison, the control signal (u—156) for controlling the PWM generator (182) is modified in such a way that the current in the direct current machine is regulated to the desired target value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.