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Yaskawa Electric America, Inc.'s E7 18-Pulse Drive system (25-500 hp), is designed specifically for HVAC applications that require low total harmonic distortion (THD). With lower THD and EMI/RFI emissions, the E7 18-Pulse Drive meets or exceeds all current power quality standards. The typical ac drive is six-pulse. The E7 18 Pulse drive design limits the THD at ...