Self harmonic elimination chopping output filtering circuit
A filtering circuit and output filtering technology, applied to the AC network to reduce harmonics/ripples, harmonic reduction devices, etc., can solve the problems of affecting the service life of electrical appliances, increasing losses, and grid pollution, so as to improve the quality of power supply, The effect of prolonging the service life and reducing the transmission loss of the line
Inactive Publication Date: 2017-02-22
山东金洲科瑞节能科技有限公司
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The output power supply voltage contains these rich harmonics, the quality of the power supply is degraded, the service life of the electrical appliances is affected, and the loss is increased. At the same time, these harmonics will be released into the power grid, causing pollution to the power grid
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0010] Such as figure 1 The shown self-resonance chopping output filter circuit includes a microprocessor U1, a sampling unit U2, a current transformer CT1, and a filter circuit. The acquisition end of the sampling unit U2 is respectively connected to the current transformer CT1, and the signal input terminal AC_L_PWM and AC_N, the output end of the sampling unit U2 is connected to the microprocessor U1, the filter circuit includes an adjustable reactor L2, the sliding control end of the adjustable reactor L2 is connected to the microprocessor U1, and a fixed end of the adjustable reactor L2 is respectively connected to The signal input terminal AC_L_PWM, one end of resistor R1, one end of capacitor C1, one end of inductor L11, one fixed end of sliding rheostat RV1, the other end of resistor R1, the other end of capacitor C1, and the other fixed end of sliding rheostat RV1 are connected to AC_N, and the other end of inductor L1 passes through Capacitor C2 is connected to AC_N;...
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
Login to View More Abstract
The invention discloses a self harmonic elimination chopping output filtering circuit. The self harmonic elimination chopping output filtering circuit comprises a microprocessor U1, a sampling unit U2, a current transformer CT1 and a filter circuit, wherein an input end of the filter circuit is connected with a signal input end AC_L_PWM, an output end of the filter circuit is connected with a signal output end AC_L_OUTPUT, the current transformer CT1 is arranged between the filter circuit and the signal output end AC_L_OUTPUT, a current sampling circuit of the sampling unit U2 is connected with the current transformer CT1, voltage sampling units of the sampling unit U2 are respectively connected with the signal input end AC_L_PWM and a signal input end AC_N, an output end of the sampling unit U2 is connected with the microprocessor U1, and an output end of the microprocessor U1 is connected with a control end of the filter circuit. By feeding back sampling of harmonic content of output currents and voltage, the self harmonic elimination chopping output filtering circuit which can absorb low-order harmonics and high-order harmonics can be designed on the output filter circuit.
Description
technical field [0001] The invention relates to a filter circuit, in particular to a self-harmonic chopper output filter circuit. Background technique [0002] In the traditional PWM chopping voltage regulation technology, due to the use of PWM high-frequency oscillation and the chopping of the sine wave, there will be various harmonics, including low-order harmonics and high-order harmonics. The output power supply voltage contains these rich harmonics, the quality of the power supply is degraded, the service life of the electrical appliances is affected, and the loss is increased. At the same time, these harmonics will be released into the power grid, causing pollution to the power grid. Contents of the invention [0003] In order to solve the above problems, the present invention provides a self-harmonic chopping output filter circuit, through the sampling feedback of the output current and voltage harmonic content, the output filter circuit is designed to be able to pe...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 裴永君
Owner 山东金洲科瑞节能科技有限公司