Current-sharing control method and current-sharing control device for carrier phase-shifting parallel circuit

A carrier phase shifting and flow control technology, which is applied in the direction of output power conversion device, control/regulation system, DC power input conversion to DC power output, etc. Problems such as large current sampling error

Inactive Publication Date: 2020-07-03
INVT POWER ELECTRONICS SUZHOU CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a current sharing control method for a carrier phase-shifting parallel circuit and a current sharing control device for a carrier phase-shifting parallel circuit, aimin...

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  • Current-sharing control method and current-sharing control device for carrier phase-shifting parallel circuit
  • Current-sharing control method and current-sharing control device for carrier phase-shifting parallel circuit
  • Current-sharing control method and current-sharing control device for carrier phase-shifting parallel circuit

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053] There are many different circuit structures in the carrier phase-shifting parallel circuit in this field. Generally, the carrier phase-shifting parallel circuit includes multi-phase interleaving and parallel bridge arms, wherein each phase bridge arm is connected to a PWM regulator, wherein The PWM regulator can realize the function of pulse signal control, and can output a PWM signal through the PWM regulator, and the PWM signal has a specific pulse width and amplitude; whenever the PWM regulator outputs PWM signals with different phases, through The PWM signal of each phase can control the...

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Abstract

The invention discloses a current-sharing control method and a current-sharing control device for a carrier phase-shifting parallel circuit. The current-sharing control method comprises the followingsteps: acquiring current of each phase of bridge arm; calculating the current change slope of each phase of bridge arm according to the PWM signal of each phase of bridge arm; and adjusting the duty ratio of the PWM signals output by the bridge arm according to the current change slope, so that the current of each phase of bridge arm is kept consistent. According to the embodiment of the invention, the current output state of each phase of bridge arm is finely adjusted according to the current change slope of each phase of bridge arm, so that output currents of all phases in the carrier phase-shifting parallel circuit can be kept completely consistent, the effect of current sharing control is achieved, the control precision of multi-phase currents in the carrier phase-shifting parallel circuit is guaranteed, and electric energy output by the carrier phase-shifting parallel circuit has high stability.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a current sharing control method of a carrier phase-shifting parallel circuit and a current sharing control device of a carrier phase-shifting parallel circuit. Background technique [0002] Since high-voltage frequency conversion and voltage modulation have become key technologies that affect the safety and stability of power systems, the carrier phase-shift modulation method has been rapidly developed, and the carrier phase-shift modulation method has been widely used. The principle is to use multiple H-bridge units to cascade multi-level control in advance, and each H-bridge unit adopts the switching frequency SPWM (Sinusoidal Pulse Width Modulation, sinusoidal pulse width modulation) modulation method; through the carrier phase-shift modulation method Each H-bridge can output a corresponding control signal, and further, output stable DC power after DC-DC...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/1584H02M3/1586
Inventor 桂峰凡念陈杰王宜昶
Owner INVT POWER ELECTRONICS SUZHOU CO LTD
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