4 results about "Current mode" patented technology

An ac-to-ac power converter includes a source-side inverter that is operated in current mode and a drive side inverter that is operated in commutation mode. The source side inverter performs current regulation during a first portion of each modulating cycle and space vector modulation during a second portion of each modulating cycle.

The invention relates to a line voltage compensation circuit based on peak detection current mode switch circuit. The line voltage compensation circuit provided by the invention comprises a sample circuit and a compensation circuit, wherein, the sample circuit is used for sampling voltages related with the line voltage, thus obtaining sampling voltages which are in linear relation with the line voltage and scaling down in proportion. The compensation circuit is connected with the sample circuit and is used for compensating the non-inverting input end or inverted input end of a comparator in the peak detection circuit by utilizing the sampling voltage of the output by the sample circuit in an electrical signal mode, so that the inductance peak point current is equal to the inductance peak point current under the ideal situation. The line voltage compensation circuit provided by the invention not only has the advantages of steady loop and quick reaction speed and the like in the traditional peak detection current mode switch control circuit, but also can be used for overcoming the problem of unstable inductance peak point current caused by system delay, so that the inductance peak point current is invariant. The line voltage compensation circuit provided by the invention can be widely applied to analogue integrated circuits.

The invention belongs to the field of electronic technology, and particularly relates to a self-adaptive secondary slope compensation circuit for a peak current mode BUCK converter. The circuit in the invention includes a self-adaptive current generating circuit and a secondary voltage signal generating circuit. A first input end of the self-adaptive current generating circuit is connected with a duty cycle signal of a BUCK converter. A second input end of the self-adaptive current generating circuit is connected with reference voltage. An output end of the self-adaptive current generating circuit is connected with a first input end of the secondary voltage signal generating circuit. A second input end of the secondary voltage signal generating circuit is connected with a pulse switch signal. An output end of the secondary voltage signal generating circuit outputs a self-adaptive secondary voltage signal. The invention has the beneficial effects of having the advantage of secondary slope compensation and meanwhile being suitable for a current mode Buck converter with a variable switching frequency.