| Abstract |
Microprocessors permit flexible open-loop and closed-loop control arrangements in electric drive engineering. For voltage-source and current-source DC link converters, parameterizable inverter trigger sets are presented for which the modulation calculation is carried out on line by a microcomputer (1). For current-source DC link converters, a special current pulse procedure for reducing torque ripple at low speeds is described. A trigger set for PWM inverters with voltage-source DC link is presented that makes it possible to adopt various modulation methods. Depending on the input parameters, the most favourable type of modulation available is assigned to each operating range. A description is given of a low-cost concept for the control and actual-value conditioning of a PWM inverter with voltage-source DC link. It features a microcomputer-friendly structure (polar coordinates and integrating actual current value acquisition) and operates without speed detector. |
