One-Quadrant DC Motor Drive with Nonlinear Step-Up-Down Characteristics
نویسندگان
چکیده
DC drives are still very important, especially for low voltages and low power (e.g. in cars and robots). In this paper a converter is analyzed, which makes it possible to control the voltage across the machine (and therefore the speed) from zero to more than two times the input voltage with a nonlinear, flat dependence at low duty cycles. This enables one to achieve high torque at low speeds with better efficiency and also higher speeds for duty cycles higher than about two-thirds. The circuit is explained, the model of the drive, the design of the devices, and some experimental results are given.
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