Controller used for three-phase three-wire Vienna rectifier
A current controller, controller technology, applied in the direction of irreversible AC power input conversion to DC power output and other directions
Active Publication Date: 2013-07-03
SANTAK ELECTRONICS SHENZHEN
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[0005] The present invention was developed to solve the above mentioned problems
Method used
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example 1
[0104] Example 1: When the mains angle is in sector 0, 2, 4, set D0 equal to D0max; when the mains angle is in sector 1, 3, 5, set D0 equal to D0min.
example 2
[0105] Example 2: When the mains angle is in sector 1, 3, 5, set D0 equal to D0max; when the mains angle is in sector 0, 2, 4, set D0 equal to D0min.
example 3
[0106] Example 3: Introduce a voltage difference controller, whose input is the difference between positive and negative BUS voltages, and whose output is the quantity Lamda with positive and negative signs. When Lamda is greater than a preset quantity Sigma (Sigma>0), let D0 be equal to D0max , when Lamda is less than -Sigma, make D0 equal to D0min.
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The invention discloses a controller used for a Vienna rectifier. The Vienna rectifier receives three-phase three-wire alternating-current input and generates three-level direct-current output on a positive bus, a negative bus and a zero line. The controller comprises an alternating-current phase detector, a voltage controller, a current reference generator, a current controller, a zero sequence modulator and a pulse-width modulation (PWM) generator and conducts controlling on a switch element of the Vienna rectifier. The controller can conduct controlling of voltage mean value on the positive bus and the negative bus and controlling on current waveform, and can restrain voltage unbalance of the positive bus and the negative bus in the Vienna rectifier.
Description
technical field [0001] The invention relates to the field of switching power supplies, in particular to the control of a three-phase three-wire Vienna rectifier circuit. Background technique [0002] With the rapid development of power electronics technology, the use of a large number of nonlinear components has injected serious harmonic pollution into the power grid. In order to solve harmonic hazards and meet harmonic standards, in addition to implementing passive harmonic compensation at the grid user end, power factor correction technology (PFC) can also be introduced inside power electronic equipment. [0003] The Vienna rectifier is an excellent active power factor correction topology. Compared with the three-phase full-bridge PWM rectifier, the Vienna rectifier has the advantages of simple structure, low cost, high efficiency, high reliability, and no danger of bridge-through. Compared with traditional PFC equipment, Vienna PFC technology has the advantages of light ...
Claims
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IPC IPC(8): H02M7/12
Inventor 全亚斌
Owner SANTAK ELECTRONICS SHENZHEN