SYSTEMS AND METHODS OF INPUT POWER AND CURRENT MEASUREMENT

摘要

A power factor control (PFC) control device is used for power factor correction and for input power and current measurement simultaneously. Input voltage and input current are measured (510, 520) using a current sensor and a voltage sensor. The current is measured after an electromagnetic interference (EMI) filter. The input voltage and input current are sampled substantially simultaneously (530). The measured input current is adjusted due to a phase shift introduced in the current sense circuit (540). The input power is calculated using the input voltage and adjusted input current (550). The total input current is determined using the PFC input current and the EMI filter reactive current (560).