Invention Grant
- Patent Title: Safety circuit, a safety circuit operation method and an electrically operated motor comprising a safety circuit
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Application No.: US15739516Application Date: 2016-06-29
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Publication No.: US10746610B2Publication Date: 2020-08-18
- Inventor: Claus Marcussen
- Applicant: Lodam electronics a/s
- Applicant Address: DK Sønderborg
- Assignee: BITZER ELECTRONICS A/S
- Current Assignee: BITZER ELECTRONICS A/S
- Current Assignee Address: DK Sønderborg
- Agency: Cantor Colburn LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@acb5660
- International Application: PCT/DK2016/050228 WO 20160629
- International Announcement: WO2017/000965 WO 20170105
- Main IPC: G01K3/00
- IPC: G01K3/00 ; G01K15/00 ; H02H7/085 ; H02H7/08 ; G05D23/30 ; H02H3/05

Abstract:
A safety circuit for temperature tripping with redundancy is disclosed. The safety circuit comprises a first temperature evaluation module comprising a first input arranged to receive a first input signal derived from a temperature by means of a temperature-dependent element; the first temperature evaluation module further comprising a first output arranged to provide a first output signal corresponding to said determined first temperature state. The safety circuit further comprises a second temperature evaluation module comprising a second input arranged to receive a second input signal derived from said temperature by means of said temperature-dependent element, the second input signal being different from said first input signal; the second temperature evaluation module further comprising a second output arranged to provide a second output signal corresponding to said determined second temperature state. The safety circuit further comprises a tripping monitoring unit connected to said first and second outputs and being arranged to establish a tripping command signal when at least one of said first and second output signals changes to a trip state. A safety circuit operation method and an electrically powered motor comprising the safety circuit are further disclosed.
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