CN212965146U

CN212965146U - System for measuring induced voltage generated during operation of iron core or magnetic core

Info

Publication number: CN212965146U
Application number: CN202022046814.2U
Authority: CN
Inventors: 陆文兴; 刘坤; 汪钢; 吴斌
Original assignee: Changzhou Zhixin Precision Electronics Co ltd
Current assignee: Changzhou Zhixin Precision Electronics Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-04-13
Anticipated expiration: 2030-09-17

Abstract

The utility model discloses a system for be used for measuring induced voltage that iron core or magnetic core during operation produced, including MCU, programmable logic device CPLD, digital analog converter DAC, first low pass filter LPF, waveform rectifier, first multiplexer MUX, current driver, measured magnetic core DUT, amplifier AMP, precision rectifier, second low pass filter LPF, second multiplexer MUX and analog to digital converter ADC. The system for measuring the induced voltage generated when the iron core or the magnetic core works is characterized in that various signals required by the MCU are generated and transmitted to the programmable logic device CPLD in a coordinated mode, the processed signals are loaded on a circle of winding of a tested magnetic core DUT, so that the other group of winding has induced voltage, the induced voltage signals are processed and then sent back to the programmable logic device CPLD, and the programmable logic device CPLD is transmitted to the MCU1 to obtain a final result after operation.

Description

System for measuring induced voltage generated during operation of iron core or magnetic core

Technical Field

The utility model relates to a magnetic material screening technical field specifically is a system for measuring induced voltage that iron core or magnetic core during operation produced.

Background

Magnetic materials can be said to be one of the key components in power electronic circuits, which have a significant impact on the volume, efficiency, etc. of power electronic devices, and therefore. The design and selection of magnetic elements is also an important link in power electronic circuitry. The magnetic materials are of various types, have different special effects and have different choices in different application occasions, and how to effectively screen and judge the magnetic materials has become the market demand. Based on this, a system for measuring the induced voltage generated by the core or cores during operation is proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a system for measuring induced voltage that iron core or magnetic core during operation produced has the advantage of being convenient for measure magnetic material's induced voltage, has solved among the prior art the inconvenient problem of selecting according to the needs of application scenario of magnetic material.

In order to achieve the above object, the utility model provides a following technical scheme: a system for measuring induced voltage generated when an iron core or a magnetic core works comprises an MCU, a programmable logic device CPLD, a digital-to-analog converter DAC, a first low-pass filter LPF, a waveform rectifier, a first multiplexer MUX, a current driver, a measured magnetic core DUT, an amplifier AMP, a precision rectifier, a second low-pass filter LPF, a second multiplexer MUX and an analog-to-digital converter ADC, wherein the programmable logic device CPLD is communicated with the MCU, a signal sending end of the MCU is connected with a signal receiving end of the programmable logic device CPLD, the signal receiving end of the programmable logic device CPLD is connected with an input end of the digital-to-analog converter DAC, an output end of the digital-to-analog converter DAC is connected with an input end of the first low-pass filter LPF, an output end of the first low-pass filter LPF is connected with an input end of the waveform rectifier and an input end of the first multiplexer MUX, and a signal output end of the waveform, the output end of the first multiplexer MUX is connected to the input end of the current driver, the output end of the current driver contacts with the induction line to bypass the magnetic core DUT to be tested, the other side contact signal line of the magnetic core DUT to be tested is connected to the input end of the amplifier AMP, the output end of the amplifier AMP is connected to the input end of the precision rectifier and the input end of the second low-pass filter LPF, the output end of the precision rectifier and the output end of the second low-pass filter LPF are connected to the input end of the second multiplexer MUX, the output end of the second multiplexer MUX is connected to the input end of the analog-to-digital converter ADC, and the analog-to-digital converter ADC.

Preferably, the amplifier AMP amplifies the induced voltage VX by a factor of 1, 10, and 100.

Preferably, the first multiplexer MUX outputs three waveforms, which are full wave, half wave and continuous wave, respectively, and the first multiplexer MUX selects one waveform to output.

Preferably, the precision rectifier is used for converting precision alternating current to direct current output.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the system for measuring the induced voltage generated when an iron core or a magnetic core works is characterized in that a MCU (microprogrammed control unit) generates various required signals in a comprehensive mode and transmits the signals to a programmable logic device CPLD (complex programmable logic device), three waveforms of full wave, half wave and continuous wave are generated after digital-to-analog conversion, filtering and rectification, one of the waveforms is selected by a multi-way switch of a first multi-way selector MUX (multiplexer) and is loaded on a circle of winding of a DUT (device under test), so that the other group of winding has induced voltage, the induced voltage is subjected to signal amplification, rectification, filtering and analog-to-digital conversion and then is sent back to the programmable logic device CPLD, and the programmable logic device CPLD is transmitted to the MCU 1; the whole facilitates measuring the induced voltage of the magnetic material.

Drawings

Fig. 1 is a working principle diagram of the present invention.

In the figure: 1. MCU; 2. a programmable logic device CPLD; 3. a digital-to-analog converter (DAC); 4. a first low pass filter LPF; 5. a waveform rectifier; 6. a first multiplexer MUX; 7. a current driver; 8. a tested magnetic core DUT; 9. an amplifier AMP; 10. a precision rectifier; 11. a second low pass filter LPF; 12. a second multiplexer MUX; 13. an analog-to-digital converter ADC.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a system for measuring the induced voltage generated by the working of the iron core or magnetic core includes an MCU1, a programmable logic device CPLD2, a digital-to-analog converter DAC3, a first low pass filter LPF4, a waveform rectifier 5, a first multiplexer MUX6, a current driver 7, a measured magnetic core DUT8, an amplifier AMP9, a precision rectifier 10, a second low pass filter LPF11, a second multiplexer MUX12, and an analog-to-digital converter ADC13, the programmable logic device CPLD2 communicates with the MCU1, the signal transmitting end of the MCU1 is connected with the signal receiving end of the programmable logic device CPLD2, the signal receiving end of the programmable logic device CPLD2 is connected with the input end of the digital-to-analog converter DAC 396 converts the digital quantity into an analog device to generate a discrete waveform, the output end of the digital-to-analog converter DAC3 is connected with the input end of the first low pass filter LPF4, the first low pass filter LPF4 generates a continuous smooth waveform, an output terminal of the first low pass filter LPF4 is connected to an input terminal of a waveform rectifier 5 and an input terminal of a first multiplexer MUX6, a signal output terminal of the waveform rectifier 5 is connected to an input terminal of the first multiplexer MUX6, an output terminal of the first multiplexer MUX6 is connected to an input terminal of the current driver 7, wherein the first multiplexer MUX6 outputs three kinds of waveforms of full wave, half wave and continuous wave, respectively, the first multiplexer MUX6 selectively outputs one kind of waveform, an output terminal of the current driver 7 contacts a sense line to bypass a magnetic core DUT8 to be measured, a current returns to GND through a conductor of Hcur and Lcur around the magnetic core DUT8 to be measured, another side contact signal line of the magnetic core DUT8 to be measured is connected to an input terminal of an amplifier AMP9, an output terminal of the amplifier AMP9 is connected to an input terminal of the precision rectifier 10 and an input terminal of the second low pass filter AMP 11, wherein the sense voltage VX is amplified by the amplifier 9 by a factor of 1, 10 times and 100 times, the precision rectifier 10 is used for converting precision alternating current to direct current for output, the output end of the precision rectifier 10 and the output end of the second low-pass filter LPF11 are both connected to the input end of the second multiplexer MUX12, the output end of the second multiplexer MUX12 is connected to the input end of the analog-to-digital converter ADC13, and the analog-to-digital converter ADC13 is connected to the programmable logic device CPLD 2.

The system for measuring the induced voltage generated when the iron core or the magnetic core works comprises that firstly, the MCU1 (namely a processor CPU) generates various required signals in an integrated mode, the signals are transmitted to the programmable logic device CPLD2, a discrete waveform generated by the digital-to-analog converter DAC3 is subjected to low-pass filtering by the first low-pass filter LPF4 to be continuous and smooth, then the discrete waveform is rectified by the waveform rectifier 5 to obtain three waveforms of full wave, half wave and continuous wave, one of the three waveforms is selected to be output by the multi-way switch of the first multi-way selector MUX6 and is loaded on one winding of the tested magnetic core DUT8, so that the induced voltage exists in the other winding, the voltage of the winding is transmitted to the amplifier AMP9, the amplifier AMP9 amplifies the signals, is rectified by the corresponding precise LPF 10, is filtered by the second low-pass filter 11 and is transmitted to the second multi-way selector MUX12, and then the induced voltage is transmitted to the analog-to-digital converter 13, the CPLD2 is transmitted to the MCU1 for operation to obtain a final result.

In summary, the following steps: the system for measuring the induced voltage generated when the iron core or the magnetic core works is characterized in that various signals required by the MCU1 are generated integrally and transmitted to the programmable logic device CPLD2, three waveforms of full wave, half wave and continuous wave are generated after digital-to-analog conversion, filtering and rectification, one of the waveforms is selected by a multi-way switch of the first multi-way selector MUX6 to be output and is loaded on one winding of the tested magnetic core DUT8, so that the other winding has induced voltage, the induced voltage is sent back to the programmable logic device CPLD2 after signal amplification, rectification, filtering and analog-to-digital conversion, and the programmable logic device CPLD2 is transmitted to the MCU1 for operation to obtain a final result; the whole facilitates measuring the induced voltage of the magnetic material.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A system for measuring induced voltage generated when an iron core or a magnetic core works is characterized by comprising an MCU (1), a programmable logic device CPLD (2), a digital-to-analog converter DAC (3), a first low-pass filter LPF (4), a waveform rectifier (5), a first multiplexer MUX (6), a current driver (7), a measured magnetic core DUT (8), an amplifier AMP (9), a precision rectifier (10), a second low-pass filter LPF (11), a second multiplexer MUX (12) and an analog-to-digital converter ADC (13), wherein the programmable logic device CPLD (2) is communicated with the MCU (1), a signal sending end of the MCU (1) is connected with a signal receiving end of the programmable logic device CPLD (2), a signal receiving end of the programmable logic device CPLD (2) is connected with an input end of the digital-to-analog converter DAC (3), an output end of the digital-to-analog converter DAC (3) is connected with an input end of the first low-pass filter (4), the output end of the first low-pass filter LPF (4) is connected with the input end of a waveform rectifier (5) and the input end of a first multiplexer MUX (6), the signal output end of the waveform rectifier (5) is connected with the input end of the first multiplexer MUX (6), the output end of the first multiplexer MUX (6) is connected with the input end of a current driver (7), the output end of the current driver (7) is in contact with a sensing line to bypass a tested magnetic core DUT (8), the other side contact signal line of the tested magnetic core DUT (8) is connected with the input end of an amplifier AMP (9), the output end of the amplifier AMP (9) is connected with the input end of a precision rectifier (10) and the input end of a second low-pass filter LPF (11), the output end of the precision rectifier (10) and the output end of the second low-pass filter LPF (11) are both connected with the input end of a second multiplexer MUX (12), the output end of the second multiplexer MUX (12) is connected to the input end of the analog-to-digital converter ADC (13), and the analog-to-digital converter ADC (13) is connected with the programmable logic device CPLD (2).

2. A system for measuring the induced voltage generated by the core or cores during operation, according to claim 1, wherein: the amplifier AMP (9) may amplify the induced voltage VX by 1, 10, and 100 times.

3. A system for measuring the induced voltage generated by the core or cores during operation, according to claim 1, wherein: the first multiplexer MUX (6) outputs three waveforms which are full wave, half wave and continuous wave respectively, and the first multiplexer MUX (6) selects one waveform to output.

4. A system for measuring the induced voltage generated by the core or cores during operation, according to claim 1, wherein: the precision rectifier (10) is used for converting precision alternating current into direct current for output.