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Method and circuit for suppressing DC side resonance of voltage source inverter

A voltage source type, suppressing circuit technology, applied in electrical components, output power conversion devices, etc., can solve the problems of increased heat dissipation, loss, and difficult matching, and achieve lower system costs, better heat dissipation, and improved space utilization. Effect

Active Publication Date: 2016-06-29
BEIJING DYNAMIC POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the resistance value of the damping resistor is very small, but has a certain power, and its value is related to the inductance and capacitance parameters of the resonant circuit, when using a conventional resistance device as a damping resistor, its resistance value and power The limitation on the resistance makes it difficult to match such a resistance device, and the damping resistance increases the heat dissipation due to the loss

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  • Method and circuit for suppressing DC side resonance of voltage source inverter
  • Method and circuit for suppressing DC side resonance of voltage source inverter

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Embodiment Construction

[0014] A method and circuit for suppressing DC side resonance of a voltage source inverter provided by an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] Such as figure 1 As shown, a method for suppressing DC side resonance of a voltage source inverter provided by an embodiment of the present invention; the method includes:

[0016] S1: Obtain the resonance parameters of the DC side resonance circuit of the voltage source inverter;

[0017] The resonance parameters include: the capacitance in the resonance circuit, the inductance in the resonance circuit, and the current of the resonance circuit near the resonance point; the damping resistance can be determined according to the resonance parameters. Since the matching of resonance parameters is more complicated, the determined damping resistance needs to be adjusted through experiments to achieve an appropriate value.

[0018] S2: According to the re...

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Abstract

The invention discloses an inhibiting method and circuit for resonance at the DC side of a voltage source inverter, wherein the method includes: obtaining resonance parameters of a resonance circuit at the DC side of the voltage source inverter; and according to the resonance parameters, setting a damping resistor in the resonance circuit at the DC side of the voltage source inverter so as to inhibit the resonance at the DC side of the voltage source inverter, wherein the damping resistor is a circuit segment comprised of conductive materials on a printed circuit board. The inhibiting method and circuit for the resonance at the DC side of the voltage source inverter are capable of adjusting flexibly the resistance of the damping resistor and comparatively good in heat dissipation; and the method and the circuit are also capable of reducing system cost and improving the system space utilization rate of the inverter.

Description

technical field [0001] The invention relates to the technical field of electronic circuit design, in particular to a method and circuit for suppressing resonance at the DC side of a voltage source inverter. Background technique [0002] On the DC side of the existing voltage source inverter, there is usually a DC support capacitor. The main function of the DC support capacitor is to absorb high-amplitude pulsating current, prevent it from generating high-amplitude pulsating voltage on the impedance of the busbar, and keep the fluctuation of the power supply voltage at the inverter within the allowable range. In addition, the support capacitor can also prevent the influence of voltage overshoot and transient overvoltage from the DC bus on the inverter. However, the supporting capacitors have parasitic inductance due to their manufacturing process, and there are also lead inductances on the DC bus. Therefore, on the loop formed by the DC bus and each supporting capacitor, usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14
Inventor 张宇星孙静
Owner BEIJING DYNAMIC POWER CO LTD