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Inductive energy storage active filter and method based on motor winding leakage inductance

A source filter and motor winding technology, which is applied in the field of inductive energy storage active filters, can solve the problems of low integration, achieve high integration, reduce secondary ripple components, and improve service life

Inactive Publication Date: 2020-08-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above methods all require an additional bidirectional DC converter and corresponding energy storage components, and the integration level is not high.

Method used

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  • Inductive energy storage active filter and method based on motor winding leakage inductance
  • Inductive energy storage active filter and method based on motor winding leakage inductance
  • Inductive energy storage active filter and method based on motor winding leakage inductance

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Effect test

Embodiment 1

[0061] An inductive energy storage active filter based on the leakage inductance of motor windings, see figure 1 and figure 2 , the active filter consists of:

[0062] The embodiment of the present invention is based on the electric vehicle integrated charging system, based on figure 1 An inductive energy storage active filter based on the leakage inductance of the motor winding is proposed to suppress the secondary ripple voltage of the DC side bus.

[0063] Depend on figure 2 It can be seen that the topology of the entire active filter is mainly composed of three H-bridges with a common DC bus (ie, H-bridge 1, H-bridge 2, and H-bridge 3) and a three-phase double-layer winding motor with a center tap. And the topology works in single-phase charging mode. Two of the H-bridges (H-bridge 1 and H-bridge 2) are connected in parallel at the input and output in parallel, and the L in the three-phase double-layer motor winding A , L A’ and L B , L B’ The leakage inductance ...

Embodiment 2

[0070] An embodiment of the present invention provides an inductive energy storage type active filter control method based on the leakage inductance of motor windings, the method comprising the following steps:

[0071] 101: Analyze the topology structure with secondary ripple suppression function in the integrated charging system;

[0072] Wherein, the step 101 is specifically: adding a group of relays (two) to switch the working mode of the charging system: traction mode and charging mode.

[0073] The structure and connection mode of the stator winding of the three-phase asynchronous motor are given, and the current flow path and the generated magnetomotive force of the adopted winding with center tap working in different modes are analyzed, so as to obtain the windings of each phase in the charging mode The self-inductance is zero (the magnetomotive forces cancel each other out), but the leakage inductance still exists.

[0074] 102: Use a DC converter with bidirectional ...

Embodiment 3

[0080] Combine below Figure 5-Figure 8 , and the specific calculation formula further introduces the scheme in embodiment 2, see the following description for details:

[0081] 1. The current setting when the inductor current flows in the form of DC

[0082] Depend on Figure 5 and Figure 6 (a) It is known that when the inductor current flows in the form of direct current, the converter has four operating modes in one cycle.

[0083] Modal 1: When S 1C S 2C S 1C’ S 2C’ =1001, the switching tube Q 5 and Q 12 conduction, the switching tube Q 6 and Q 11 off. At this time, the inductance passes through the power switch tube Q 5 and Q 12 Energy storage is carried out, and the inductor current increases positively, and the voltage at both ends of the inductor is the DC bus voltage.

[0084] Mode 2: When S 1C S 2C S 1C’ S 2C’ =0000, the switching tube Q 5 , Q 6 , Q 11 and Q 12 Both are turned off, because the direction of the inductor current cannot change abr...

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Abstract

The invention discloses an inductive energy storage type active power filter based on motor winding leakage inductance and a method. The active filter is used in the integrated charging system of electric vehicles to suppress the secondary ripple voltage of a DC side bus. The topology consists of three H-bridges with a common DC bus and a three-phase double-layer winding motor with a center tap. The inputs and the outputs of two H-bridges are connected in parallel and the leakage inductance of LA, LA' and LB, LB' in the windings of the three-phase double-layer motor is used as the filter inductance, so that the two H-bridges work together in the single-phase PWM rectification mode. The third H-bridge and the leakage inductance of LC and LC' in the motor windings form an active filter withan inductor as the energy storage element, so that the secondary ripple voltage is suppressed. The method comprises the following steps: the structure and connection mode of the stator winding of a three-phase asynchronous motor are given; the current flow paths of working in different modes of the winding with the center tap and the magnetomotive force generated thereby are obtained; the secondary pulsation energy can be absorbed and released by a DC converter with bi-directional energy flow. The secondary ripple voltage is effectively reduced by inductor current compensation control.

Description

technical field [0001] The invention relates to the field of topology and control technology of power electronics technology, in particular to an inductive energy storage active filter and method based on leakage inductance of motor windings. Background technique [0002] Energy is the foundation of global economic development and human daily life, but with the rapid economic growth and rapid social development, the demand and consumption of energy are increasing. At the same time, the per capita car ownership in the world is increasing. The current automobile still uses fossil fuels as the main energy source, and the environmental problems caused by excessive use of fossil energy are becoming more and more serious. New energy vehicles use renewable energy as the power source and can achieve clean and pollution-free operation. They are considered to be one of the new modes of transportation that can effectively alleviate the energy crisis and environmental pollution. With ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14
CPCH02M1/14
Inventor 张云方剑宋天宝
Owner TIANJIN UNIV