Current-type DC-AC converter for driving low-input-voltage motor and soft switching control thereof
A low-input voltage, motor-driven technology, used in motor generator control, electronic commutation motor control, AC motor control, etc., can solve the problems of inability to step down, the output voltage is not high enough, and the output voltage range is limited. Application prospect, strong boost capability, small common mode current effect
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[0020] The technical solution of the present invention will be described in further detail below through specific examples in conjunction with the accompanying drawings.
[0021] A current-mode DC-AC converter for low-input-voltage motor drive and its soft-switching control, its circuit structure is shown in figure 1 As shown, the converter is composed of an input power supply, a high-gain buck-boost chopper circuit with ZVS active clamp, an m-phase current-mode inverter circuit and an output filter circuit connected in sequence. When m is equal to 3, the m-phase current-type inverter circuit becomes a three-phase current-type inverter circuit, such as figure 2 As shown, in order to facilitate the description of the circuit principle, the numbering sequence of the switching tubes of the 3-phase current-type inverter circuit is changed, and the switching tubes of the upper bridge arm are in order of S 1 , S 3 , S 5 , the switching tubes of the lower bridge arm are S 4 , S ...
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