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Rectification module and flow-equalizing three-level power supply control method

A rectifier module and power control technology, applied in the direction of high-efficiency power electronic conversion, conversion of AC power input to AC power output, and conversion of AC power input to DC power output, etc., can solve problems such as affecting battery life and improve DC utilization. efficiency, the number of output levels, and the effect of reducing voltage harmonics

Inactive Publication Date: 2018-11-30
佛山市众盈电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rectifier module and a current-sharing three-level power supply control method. By adopting the twelve-pulse charging and rectifying charging technology, the output ripple is greatly reduced, and at the same time, the 400Hz intermediate frequency step-up rectification can effectively improve the power supply. Efficiency, further reducing the output ripple to solve the problem that the output ripple is too large in the traditional circuit and affects the service life of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A rectifier module and a method for controlling a current-sharing three-level power supply, the specific steps of which are:

[0027] Step 1: Connect a mid-point clamped three-level inverter consisting of twelve turn-off elements and six thyristors in series, and connect the mid-point of the thyristor to the mid-point of the series filter capacitor;

[0028] Step 2, based on all the requirements for the switching sequence design of the three-level inverter: in the process of switching from one switching state to another switching state, only two switching devices on the same bridge arm are affected, and one is turned on. , a shutdown;

[0029] Step 3: On the basis of the original six-pulse rectification, add a group of six-pulse rectifiers after adding a phase-shifting transformer at the input end, so that the DC bus current is rectified by 12 thyristors to form a twelve-phase rectification circuit;

[0030] Step 4: Connect the rectifier module and the three-level modu...

Embodiment 2

[0036] The present invention also provides a rectifier module and a current sharing three-level power supply control method, the specific steps of which are:

[0037] Step 1: Connect a mid-point clamped three-level inverter consisting of twelve turn-off elements and six thyristors in series, and connect the mid-point of the thyristor to the mid-point of the series filter capacitor;

[0038] Step 2, based on all the requirements for the switching sequence design of the three-level inverter: in the process of switching from one switching state to another switching state, only two switching devices on the same bridge arm are affected, and one is turned on. , a shutdown;

[0039] Step 3: On the basis of the original six-pulse rectification, add a group of six-pulse rectifiers after adding a phase-shifting transformer at the input end, so that the DC bus current is rectified by 12 thyristors to form a twelve-phase rectification circuit;

[0040] Step 4: Connect the rectifier modul...

Embodiment 3

[0046] The present invention also provides a rectifier module and a current sharing three-level power supply control method, the specific steps of which are:

[0047]Step 1: Connect a mid-point clamped three-level inverter consisting of twelve turn-off elements and six thyristors in series, and connect the mid-point of the thyristor to the mid-point of the series filter capacitor;

[0048] Step 2, based on all the requirements for the switching sequence design of the three-level inverter: in the process of switching from one switching state to another switching state, only two switching devices on the same bridge arm are affected, and one is turned on. , a shutdown;

[0049] Step 3: On the basis of the original six-pulse rectification, add a group of six-pulse rectifiers after adding a phase-shifting transformer at the input end, so that the DC bus current is rectified by 12 thyristors to form a twelve-phase rectification circuit;

[0050] Step 4: Connect the rectifier module...

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Abstract

The invention discloses a rectification module and a flow-equalizing three-level power supply control method. The flow-equalizing three-level power supply control method comprises the specific steps that 1, neutral-point-clamped three-level inverters constituted by twelve turn-off elements and six thyristors are connected in series, and neutral points of the thyristors are connected to intermediate points connected with filter capacitors in series; 2, all requirements based on switching sequence design of the three-level inverters are that in the process that one switching state is switched into the other switching state, only two switching devices on the same bridge arm are influenced, one of the two switching devices is powered on, and the other switching device is powered off; and 3, onthe basis of original six-pulse rectification, a set of six-pulse rectifiers is additionally arranged after a phase-shifting transformer is additionally arranged at the input end, thus a direct-current bus current is completed through twelve controllable silicon rectifiers, and a twelve-phase rectification circuit is constituted. Output ripple waves are lowered greatly, influences of the ripple waves during battery charging are lowered, and the life of a battery can be prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a rectifier module and a current-sharing three-level power supply control method. Background technique [0002] When the traditional rectifier module and three-level technology are used in combination to charge the battery, a six-pulse rectifier is often used for rectification. However, due to the large harmonic content of the six-pulse rectifier, the output ripple in the output circuit is large when used in combination, which affects the battery. service life. [0003] Therefore, it is necessary to invent a rectifier module and a current sharing three-level power supply control method to solve the above problems. Contents of the invention [0004] The purpose of the present invention is to provide a rectifier module and a current-sharing three-level power supply control method. By adopting the twelve-pulse charging and rectifying charging technology, the output ripple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/487H02M5/458H02M1/14
CPCH02M1/14H02M5/458H02M7/487H02M1/0048Y02B70/10
Inventor 罗焕均杜杰德韩书兵
Owner 佛山市众盈电子有限公司
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