47 lines
1.3 KiB
PHP
47 lines
1.3 KiB
PHP
<?php
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class PhaseManager
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{
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public static function normalizePhaseCount(int $phases): int
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{
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if ($phases <= 1) {
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return 1;
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}
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return 3;
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}
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public static function wattsFromCurrent(float $currentA, int $phases, float $voltage = 230.0): int
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{
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$phaseCount = self::normalizePhaseCount($phases);
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return (int)round($currentA * $voltage * $phaseCount);
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}
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public static function currentFromPower(float $powerW, int $phases, float $voltage = 230.0): float
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{
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$phaseCount = self::normalizePhaseCount($phases);
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if ($voltage <= 0 || $phaseCount <= 0) {
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return 0.0;
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}
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return round($powerW / ($voltage * $phaseCount), 2);
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}
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public static function choosePhaseToUse(array $phaseCurrents): int
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{
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$bestPhase = 1;
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$bestCurrent = null;
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foreach ([1, 2, 3] as $phase) {
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$value = isset($phaseCurrents[$phase]) ? (float)$phaseCurrents[$phase] : null;
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if ($value === null) {
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continue;
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}
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if ($bestCurrent === null || $value < $bestCurrent) {
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$bestCurrent = $value;
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$bestPhase = $phase;
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}
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}
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return $bestPhase;
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}
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}
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?>
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