Double-fuzzy PI controller of three-phase full-bridge circuit voltage outer loop and control method thereof

A technology of fuzzy controller and three-phase full bridge, which is applied in the direction of motor generator control, electronic commutation motor control, electromechanical brake control, etc., can solve the problem that the system cannot be self-adapted well, and achieve high precision of PI control Effect

Pending Publication Date: 2020-10-09
YANGZHOU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a double-fuzzy PI controller for the voltage outer loop of a three-phase full-bridge circuit, which solves the problem that the three-phase full-bridge circuit cannot operate well under the conditions of wide network side AC voltage and wide DC side voltage. Adapt to the change of these two parameters and work normally

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  • Double-fuzzy PI controller of three-phase full-bridge circuit voltage outer loop and control method thereof
  • Double-fuzzy PI controller of three-phase full-bridge circuit voltage outer loop and control method thereof
  • Double-fuzzy PI controller of three-phase full-bridge circuit voltage outer loop and control method thereof

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Embodiment Construction

[0062] Such as figure 1 with figure 2 As shown, the dual-fuzzy PI controller 5 of the voltage outer loop of the three-phase full-bridge circuit of the present invention is composed of the following four components: a sub-fuzzy controller 1, a main fuzzy controller 2, a differentiator 3 and a PI regulator 4.

[0063] figure 2 It is a schematic diagram of the application circuit of the present invention, the three-phase full bridge circuit 15 is composed of a network side AC voltage source (u a , u b , u c ), an energy storage inductance 12, a three-phase bridge topology 13 and a DC side capacitor 14; the digital controller 19 is realized by a digital control chip, and the digital controller 19 is composed of a double-fuzzy PI controller 5 of the three-phase full-bridge circuit voltage outer loop , RMS calculation 6, coordinate transformation 7, current inner loop controller 8, AD sampling channel 9 and PWM generator 10 constitute. The digital controller 19 and the three-...

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Abstract

The invention discloses a double-fuzzy PI controller of a three-phase full-bridge circuit voltage outer loop. The double-fuzzy PI controller is connected to a three-phase full-bridge circuit, and is used for collecting parameter signals on the three-phase full-bridge circuit, and realizing control over the three-phase full-bridge circuit. The double-fuzzy PI controller comprises a sub-fuzzy controller, a main fuzzy controller, a differentiator and a PI regulator, and solves the problem that a system cannot well adapt to changes of two parameters to work normally when the three-phase full-bridge circuit is under the working conditions of wide-network-side alternating-current voltage and wide-direct-current-side voltage.

Description

technical field [0001] The invention relates to a three-phase full-bridge circuit controller, in particular to a double-fuzzy PI controller of a voltage outer loop. Background technique [0002] The three-phase full-bridge circuit is widely used in new energy power generation, electric transmission and other fields because of its advantages such as high power factor, low harmonic content, high power utilization rate and reversible bidirectional flow of energy. The three-phase full-bridge circuit generally adopts the traditional double closed-loop control, that is, the double closed-loop control method of the voltage outer loop cascaded current inner loop, and the voltage outer loop controller and the current inner loop controller both use the PI algorithm, that is, the PI regulator. In a double-closed-loop control system, the proportional control parameter Kp and integral control parameter Ki of the PI regulator are often designed for a certain working condition, which can b...

Claims

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Application Information

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IPC IPC(8): H02M7/68H02P21/00H02P21/14H02P21/22
CPCH02M7/68H02P21/0003H02P21/14H02P21/22
Inventor方宇张维轩
OwnerYANGZHOU UNIV