Overcurrent detection circuit, inverter, compressor, and air-conditioning machine, and adjusting method for adjusting overcurrent detection circuit
US9653906B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2016 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Jul 29, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/403
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current detection device for detecting an electric current flowing through an inverter, an overcurrent level generation device for generating an abnormality judgment reference value, an overcurrent detection device for generating an interruption signal to the inverter on the basis of an output of the current detection device and the abnormality judgment reference value, and an adjusting apparatus for correcting the abnormality judgment reference value of the overcurrent level generation device on the basis of the output at a time when a constant electric current is applied to the current detection device are provided. The overcurrent level generating device is provided with one or a plurality of resistance value adjusting sections, and generates the abnormality judgment reference value in correspondence to a resistance value of the resistance value adjusting section. The adjusting apparatus performs a zapping operation by means of applying a reverse-bias to a zener diode, and corrects the abnormality judgment reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.