Synchronizing switching times of relays to a zero-crossing
AssigneeHoneywell International Inc.
InventorsMichael Asmussen, Philipp Anton Roosli
Life of this patent
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Abstract
Methods, devices, and systems for synchronizing switching times of relays to a zero-crossing are described herein. One device includes a memory, and a processor configured to execute executable instructions stored in the memory to receive phase information of an alternating-current (AC) electric mains, determine, from the phase information, a zero-crossing of the phase of the AC electric mains, determine a reference time based on the zero-crossing for a number of relays corresponding to a number of relay controllers, and transmit the reference time to the number of relay controllers.
Claims20
A timing controller for synchronizing switching times of relays to a zero-crossing, comprising:
- a memory;
- a processor configured to execute executable instructions stored in the memory to:
- receive phase information of an alternating-current (AC) electric mains;
- determine, from the phase information, a zero-crossing of the phase of the AC electric mains;
- determine a reference time based on the zero-crossing for a number of relays corresponding to a number of relay controllers;
- and
- transmit the reference time to the number of relay controllers.
A system for synchronizing switching times of relays to a zero-crossing, comprising:
- a timing controller connected to an alternating-current (AC) electric mains of a building, configured to:
- receive phase information of the AC electric mains;
- determine, from the phase information, a zero-crossing of the phase of the AC electric mains;
- determine a reference time based on the determined zero-crossing of the AC electric mains;
- and
- transmit the reference time to a number of relay controllers;
- the number of relay controllers, each configured to:
- receive the reference time from the timing controller;
- and
- switch relay contacts of a number of relays corresponding to the number of relay controllers based on the reference time.
A computer implemented method for synchronizing switching times of relays to a zero-crossing, comprising:
- receiving, by a timing controller, phase information of an alternating-current (AC) electric mains;
- determining, by the timing controller, a zero-crossing of the phase of the AC electric mains from the phase information;
- determining, by the timing controller, a reference time based on the determined zero-crossing for a number of relays corresponding to a number of relay controllers;
- and
- transmitting, by the timing controller, the reference time to the number of relay controllers.
Dependencies are inferred from the claim text.