Title :
Implementation of a Four-Pole Dead-Time-Compensated Neutral-Point-Clamped Three-Phase Inverter With Low Common-Mode Voltage Output
Author :
Cuzner, Robert M. ; Bendre, Ashish R. ; Faill, Peter J. ; Semenov, Boris
Author_Institution :
DRS Power & Control Technol., Milwaukee, WI
Abstract :
This paper describes the implementation of a four-pole neutral-point-clamped (NPC) three-phase inverter that produces virtually no common-mode voltage. The low common-mode voltage output is achieved by constraining the switch states of the NPC inverter to only those states that produce zero common-mode voltage in dead-time compensation, which enhances the capability of the circuit to produce low common-mode voltage by compensating common-mode voltages produced by reverse diode commutations. The low common-mode voltage performance is achieved at the expense of reduced voltage utilization and loss of DC-link voltage balance control. In order to overcome this limitation, a fourth pole and associated control are added to balance the upper and lower dc-link voltages. This paper describes the control implementations and simulation results compared to measured results used in tuning and commissioning of the system. A 450-V 78-kW system is implemented in hardware, and experimental results are provided, showing its differential mode transient and steady-state harmonic performance as well as its common-mode output voltage.
Keywords :
electromagnetic compatibility; invertors; DC-link voltage balance control; NPC inverter; dead-time compensation; differential mode transient; four-pole dead-time-compensated neutral-point-clamped three-phase inverter; low common-mode voltage output; reverse diode commutations; steady-state harmonic performance; zero common-mode voltage; Diodes; Hardware; Inverters; Low voltage; Performance loss; Steady-state; Switches; Switching circuits; Voltage control; Zero voltage switching; Electromagnetic compatibility; grounding; power systems; pulse width modulated inverters;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2009.2013603