Abstract
The switching dead-time, avoiding a bridge leg short-circuit in a PWM voltage source inverter, produces distortions of the controlling inverter output performance such as current waveform, voltage vector and torque. In this paper, the influence of dead-time is investigated. The online space voltage vector modulation method is used for the current controller. It is possible to compensate dead-time by spacevoltage vector modulation, which generates an additional pulse compensating voltage distortion caused by the dead-time. In addition, a narrow pulse, which is generally neglected, can be compensated. All the algorithms, including field-oriented control are performed by a one chip microprocessor 80C196MC and DSP TMS320C31. Experimental results prove that the proposed scheme provides a good inverter output performance.
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