SYSTEMS AND METHODS FOR SPACE VECTOR PULSE WIDTH MODULATION SWITCHING USING BOOTSTRAP CHARGING CIRCUITS

摘要

Embodiments relate to systems and methods for space vector pulse width modulation switching using bootstrap charging circuits. Platforms and techniques are provided for controlling a power inverter using space vector pulse width modulation (PWM) operation. The inverter converts a direct voltage (DC) power source to alternating voltage (AC) output by controlling a set of three phase switches. A bootstrap capacitor is coupled to each switch. When each switch in the set of three phase switches is in a zero state, the coupled bootstrap capacitor can charge from the current delivered in a corresponding pulse width modulation (PWM) signal. The bootstrap capacitor can deliver stored power when a one (high) switch state is entered. Each switch can be maintained at a zero state, and thus charge the bootstrap capacitor, for at least two consecutive segments of the PWM cycle. Pre-charging of the bootstrap capacitor is ensured before power delivery is required.