Method and device for detecting a control method of an inverter
US10236813B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2016 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jan 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K9/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for detecting a control method of an inverter (11) for supplying current to an electric machine (1), in particular a synchronous machine, having N phases. The method comprises sensing a control signal (CU, DU, CV, DV, CW, DW), which is fed to the inverter and which is clocked with a periodic cycle, over a specified number of periodic cycles of the control signal; determining a duty cycle frequency for the sensed control signal over the specified number of periodic cycles; and detecting the control method on the basis of the determined duty cycle frequency. The invention further relates to a device (5) designed to perform the method. In addition, the invention further relates a use of the method or of the device to monitor a torque of the electric machine and in particular to estimate an operating-point-dependent power loss of the electric machine according to the detected control method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.