Unlock instant, AI-driven research and patent intelligence for your innovation.

Five-level hysteresis comparison inverter

A hysteresis comparator and hysteresis comparison technology, applied in electrical components, emergency protection circuit devices, AC power input conversion to DC power output, etc., can solve the problems of large switching loss, large harmonics and waveform distortion rate, etc. Achieve the effect of reducing damage to electronic switches, reducing failure points, and saving the number of electronic switches

Pending Publication Date: 2021-10-01
北京国科翼达电力节能科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional hysteresis comparison inverter switching frequency will change in a wide range, either too high or too low, especially near the zero crossing point, and it is easy to produce imbalance. Too high switching frequency will cause excessive switching loss, while too low A high switching frequency will cause large harmonics and waveform distortion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Five-level hysteresis comparison inverter
  • Five-level hysteresis comparison inverter
  • Five-level hysteresis comparison inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention will be further described.

[0031] The structure topology diagram of single-phase five-level hysteresis comparison inverter is as follows figure 1 , wherein the inverter circuit mainly includes a DC power supply E, an H-shaped bridge arm H, a first bridge arm AC, a second bridge arm BD, a first capacitor bank C1, and a second capacitor bank C2. The first end of the DC power supply E, the first end of the first capacitor bank C1 are connected to the first end of the H-shaped bridge arm H (i.e. node I); the second end of the DC power supply E, the second end of the second capacitor bank C2 are connected to the H The second end of the type bridge arm H is connected to the ground (that is, the J node); the second end of the first capacitor bank C1, the first end of the second capacitor bank C2, and the first ends of the two bridge arms AC and BD are connected. connected (i.e. node C or D); the second en...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a five-level hysteresis comparison inverter topology and a control method thereof. The five-level hysteresis comparison inverter topology is characterized in that an inverter circuit comprises a DC power supply, an H-shaped bridge arm, a first bridging bridge arm, a second bridging bridge arm, a first capacitor bank and a second capacitor bank. The control method comprises a hysteresis upper limit and a hysteresis lower limit, and the five levels are accurately and quickly selected and switched, so that the most suitable level output under the current working condition is selected, and the current actually output by the inverter is controlled to track the instruction current according to the corresponding rate change. According to the five-level hysteresis comparison inverter, hysteresis tracking control over the reference current is achieved, electronic switch damage caused by too high switching frequency of a traditional hysteresis comparison inverter and large harmonic waves and current distortion caused by too low switching frequency are reduced, the current tracking effect of the inverter is guaranteed, the performance of the inverter is improved, and compared with a traditional cascaded five-level inverter, the number of electronic switches is reduced, the cost is reduced, and fault points are reduced.

Description

technical field [0001] The invention relates to the technical field of five-level inverter topology and its control, in particular to a five-level hysteresis comparison inverter topology and its control method. Background technique [0002] An inverter is an electrical device that converts direct current into alternating current. Generally composed of inverter circuit, control unit and filter circuit, it is a key component of some electrical equipment, such as uninterruptible power supply (UPS), active filter, frequency converter, etc. The traditional bridge inverter is widely used due to its simple structure and easy control, but its output waveform has large harmonic components, which limits the application of bridge inverters in precision electrical equipment. [0003] With the advent of multi-level technology, various control technologies have emerged as the times require. Due to the increase in the number of output levels, the harmonic content of the output voltage of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M1/088H02M1/12H02M1/32H02H7/122
CPCH02M7/53871H02M1/088H02M1/12H02M1/32H02H7/122
Inventor 张帅郝春生劳鹏运
Owner 北京国科翼达电力节能科技有限公司