Invention Grant
- Patent Title: Integral half cycle (IHC) control
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Application No.: US16944444Application Date: 2020-07-31
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Publication No.: US11614758B2Publication Date: 2023-03-28
- Inventor: Mark Hirst
- Applicant: Hewlett-Packard Development Company, L.P.
- Applicant Address: US TX Spring
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Spring
- Agency: Brooks, Cameron & Huebsch, PLLC
- Main IPC: G05F1/455
- IPC: G05F1/455 ; G03G15/00 ; H05B1/02 ; B41J2/475 ; H03K5/156 ; G05F5/00 ; H02M1/12 ; H02M5/257 ; H02M5/27 ; G03G15/20

Abstract:
Power to an electrical device is controlled using a phase control that changes a cutoff phase of an alternating current (AC) electrical signal delivered to the electrical device. The power delivered to the electrical device is increased to an operational level using the phase control. A level of the power delivered to the electrical device is maintained at the operational level using an integral half cycle control that selectively removes a plurality of half cycles from the AC electrical signal delivered to the electrical device such that a plurality of remaining half cycles in the AC electrical signal delivered to the electrical device have a frequency outside a range of sub-harmonic frequencies.
Information query
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