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Common dc bus drive systems are gaining in popularity. They are compact and require less cabinet space. Efficiency is enhanced because they share power on the dc bus. Ultimately, they are cost-effective solutions to common drive problems and offer a wide range of features applicable to many industries and power ranges.
The typical stand-alone ac drive consists of a single contained unit that includes a rectifier, dc link, and inverter. With a common dc bus system a common rectifier supplies power to the dc bus for the inverters (dc-ac units), instead of individual rectifiers used in stand-alone ac drives. For more elaborate applications regenerative rectifiers and active front ends can also be used to power the dc bus. Regardless of the ac power source, common...