Search - frequency 50

[Other] 温升测试

Description: 电机温升测试系统,适用于工作频率为50/60Hz的单/三相小功率异步电机（≤5KW）、串级电机、电动工具的绕组温升测量。适用于工作频率为50/60Hz的电源变压器、充电器、电感镇流器的绕组温升测量。带电原理：在带电工作情况下测量绕组的直流电阻，并用公式折算成温升。专为电动工具定子，转子温升测量而开发，其中定子采用带电法，转子采用断电法-motor temperature test system is applicable to the frequency of 50/60Hz single / three-phase asynchronous motors power the small ( 5KW), Cascade motor, electric tools winding temperature measurement. Applicable to the frequency of 50/60 Hz power transformers, chargers, the inductance ballasts winding temperature measurement. Charged Principle : Live in work measurement of the winding resistance DC, and the formulas used converted into temperature. Electric tools for the stator and rotor temperature measurement and development, which use charged stator, rotor features a power law
Platform: | Size: 196894 | Author: dm | Hits:

[Other resource] es_mutil_meters_with_m128

Description: 基于MEGA128的多功能仪器,提供以下9种功能： 1. 2路0-10 VDC 电压表 2. 1路0-30V DC 电压表，带有一个10X跳针，可以测试0-300VDC 3. 0 – 3 安电流表 4. 4 通道逻辑分析仪 5. 频率发生器，50%占空比方波，0－5VDC，1HZ到8MHZ. 6. 波形发生器，正弦波、三角波、方波，1HZ 到　20＋MHZ? 7. 频率计 8. +5 VDC ，200 mA 供电输出 9. -5 VDC ， 300 mA 供电输出 -MEGA128 based on the multifunctional equipment to provide the following nine functions : 1. Two Road 0-10 VDC voltage Table 2. A Road 0-30V DC voltage meter, with a 10X jump needles to test 0-300VDC 3. 0-3 - 4 ammeter. 4-channel logic analyzer 5. Frequency Generator, 50% duty cycle square 0-6 - 5VDC, to 8MHZ 1HZ. 6. waveform generator, sine, triangle wave, square wave, 1HZ MHZ to 20 + 7. Cymometer 8. 5 VDC, 200 9 mA output power. 5 VDC, 300 mA output power
Platform: | Size: 513522 | Author: 许海洋 | Hits:

[Other resource] jtag_cpld_vhdl

Description: JTAG CPLD实现源代码，比用简单并口调试器快5倍以上。以前总觉得简单的并口jtag板速度太慢，特别是调试bootloader的时候，简直难以忍受。最近没什么事情，于是补习了几天vhdl，用cpld实现了一个快速的jtag转换板。cpld用epm7128stc100-15，晶振20兆，tck频率5兆。用sjf2410作测试，以前写50k的文件用时5分钟，现在则是50秒左右。tck的频率还可以加倍，但是不太稳定，而且速度的瓶颈已经不在tck这里，而在通讯上面了。 -JTAG CPLD source code than the simple parallel debugger five times faster. Before feel simple parallel port JTAG board is too slow, especially when debugging Bootloader, simply intolerable. No matter recently, so VHDL tutorial for a few days, with cpld to achieve a rapid conversion of JTAG board. Cpld with epm7128stc100-15, 20 Katherine crystal, the frequency tck 5 trillion. Sjf2410 used for testing, before the document was made with 50k at 5 minutes, now it is about 50 seconds. Tck frequencies can also doubled, but not too stable, but the rate has not tck bottleneck here, and in the above communications.
Platform: | Size: 2023 | Author: 李伟 | Hits:

[DSP program] lms

Description: 1、本试验中未知系统采用25阶的FIR滤波器模拟。其通带边缘频率10kHz，阻带边缘频率22kHz，阻带衰减75dB，采样频率50 kHz。 2、自适应滤波器采用基本LMS算法，滤波器阶数为32，更新步长u为1/(4+xn*xn)。LMS自适应算法参见《现代信号处理》第192页。已经在DSP2812上实现-1, the test system uses a 25 unknown band analog FIR filter. The passband edge frequency 10kHz, stopband edge frequency 22kHz, stopband attenuation 75dB, sampling frequency 50 kHz. 2, using the basic LMS adaptive filter algorithm, filter order of 32 to update the step size u for the 1/(4+ Xn* xn). LMS adaptive algorithm, see
Platform: | Size: 204800 | Author: sunyee | Hits:

[matlab] iirnotch1

Description: 设计IIR数字陷波器，采样率为6.4kHz，陷波频率点为50Hz、150Hz、250Hz；c1.mat为输入数据文件；并且包括陷波前后的频谱分析。-Design of IIR digital notch filter, sampling rate of 6.4kHz, notch frequency point of 50Hz, 150Hz, 250Hz c1.mat for input data files and includes the notch before and after the spectrum analysis.
Platform: | Size: 17408 | Author: 李守轩 | Hits:

[Other] ControlofInductionMotors

Description: Among many types of the motors, three-phase induction machines still enjoy the same unparalleled popularity as they did a century ago. At least 90 of industrial drive systems employ induction motors. Most of the motors are uncontrolled, but the share of adjustable speed induction motor drives fed from power electronic converters is steadily increasing, phasing out dc drives. It is estimated that more than 50 billion dollars could be saved annually by replacing all "dumb" motors with controlled ones. However, control of induction machines is a much more challenging task than control of dc motors. Two major difficulties are the necessity of providing adjustable-frequency voltage (dc motors are controlled by adjusting the magnitude of supply voltage) and the nonlinearity and complexity of analytical model of the motor, aggrandized by parameter uncertainty. - Among many types of the motors, three-phase induction machines still enjoy the same unparalleled popularity as they did a century ago. At least 90 of industrial drive systems employ induction motors. Most of the motors are uncontrolled, but the share of adjustable speed induction motor drives fed from power electronic converters is steadily increasing, phasing out dc drives. It is estimated that more than 50 billion dollars could be saved annually by replacing all "dumb" motors with controlled ones. However, control of induction machines is a much more challenging task than control of dc motors. Two major difficulties are the necessity of providing adjustable-frequency voltage (dc motors are controlled by adjusting the magnitude of supply voltage) and the nonlinearity and complexity of analytical model of the motor, aggrandized by parameter uncertainty.
Platform: | Size: 8368128 | Author: kumar | Hits:

[Graph Drawing] FrequencyDomainAnalysisOfTheSystem

Description: 信号频谱分析 1. 观测已知方波信号、正弦波信号的频谱分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。观测实时模拟信号（语音）的频谱用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图-Signal spectrum analysis 1. Observing a known square-wave signal, sine wave signal frequency spectrum analysis 4KHz, 8KHz for the 50 duty cycle square wave signal, sine wave signal frequency spectrum. The recorded frequency spectrum. Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw maps and voice waveform spectrum
Platform: | Size: 94208 | Author: benny | Hits:

[Other] onesecond

Description: 用verilog实现将50M晶振分频，得到1M的功能，本人已经用Quarter9.0运行成功。-To achieve with verilog 50M crystal frequency, get 1M' s functions, I have run successfully with Quarter9.0.
Platform: | Size: 305152 | Author: wt | Hits:

[SCM] Frequency-measurement

Description: 以50 Hz 周波为例介绍了用AT89C51 最小系统实现周波的频率计量及使用4 位液晶驱动芯片 ICM7211AM进行4 位液晶显示控制电路原理和控制程序。-To 50 Hz frequency, an example system implementation using AT89C51 minimum frequency of the frequency of measurement and the use of 4-bit LCD driver IC ICM7211AM for four liquid crystal display control circuit and control procedures.
Platform: | Size: 87040 | Author: 黄岩 | Hits:

[VHDL-FPGA-Verilog] fenpin

Description: 分频电路的研究主要包括：偶数分频（二分频、偶数分频占空比50 ）、奇数分频（占空比50 、占空比非50 ）、半整数分频（不要求占空比）、小数分频（不要求占空比）。 -Frequency of the circuit includes: an even frequency (half frequency, frequency 50 duty cycle even), odd-frequency (50 duty cycle, duty cycle of non-50 ), half-integer frequency division (not required duty cycle), fractional (not required duty cycle).
Platform: | Size: 16384 | Author: lishaohui | Hits:

[Special Effects] TuBCT9.50

Description: A Novel Efficient Approach for Audio Segmentation a novel approach to audio segmentation is presented. The problem of detecting audio segments’ limits is treated as a binary classification task. Frames are classified as “segment limits” vs “nonsegment limits”. For each audio frame a spectrogram is computed and eight feature values are extracted from respective frequency bands. Final decisions are taken based on a classifier combination scheme
Platform: | Size: 225280 | Author: kvga | Hits:

[matlab] 50Hzremove

Description: 利用matlab滤除50HZ工频干扰的代码，另有一篇相关论文-Use of matlab filter frequency 50 HZ power frequency interference code
Platform: | Size: 266240 | Author: kaiyongx | Hits:

[VHDL-FPGA-Verilog] 05_SPWM

Description: SPWM EVA下面的通用定时器T1工作于连续增/减计数模式，产生三角载波，载波频率为3000Hz，载波比N=60，因此调制波形正弦波的频率为50Hz。本实验中，调制度为0.8。-2812-SPWM EVA the following general timer T1 work/down to count the prototype model, produce the triangle carrier, the carrier frequency for 3000 Hz, carrier than N = 60, so the sine wave frequency modulation wave for frequency 50 Hz. In this experiment, and the system for 0.8.
Platform: | Size: 226304 | Author: 杨美珍 | Hits:

[Wavelet] zishiying50hz

Description: 由仿真结果时域和频域图可以看出，工频50Hz干扰信号很好被滤除掉，说明所设计的自适应滤波器效果较好。-It can be seen by the domain and frequency domain simulation results in Figure, the frequency 50 Hz interference signals very well be eliminated, the design of the adaptive filter is better.
Platform: | Size: 1024 | Author: 李皓天 | Hits:

[VHDL-FPGA-Verilog] Diminishing-points-frequency

Description: 外接50M晶振，可分频为20、10、5、1KHz的占空比为50 的递减分频-External 50 M crystals, can divide frequency for 20, 10, 5, 1 KHz accounted for more than 50 of the empty diminishing points frequency
Platform: | Size: 1024 | Author: 李晓宇 | Hits:

[SCM] frequency-meter

Description: 基于msp430g2553的频率计，测频波形：尽可能使50 占空比的矩形波测频幅度范围：尽可能取 0~3.6V-Based frequency meter of msp430g2553, measured frequency waveform: as much as possible so that the 50 duty cycle of the square wave frequency measurement amplitude range: as much as possible to take 0 ~ 3.6V
Platform: | Size: 53248 | Author: 罗民 | Hits:

[VHDL-FPGA-Verilog] Half_Frequence

Description: 本程序基于VHDL语言，设计分频器，其中包含半整数分频占空比不为50 奇数分频占空比为50 任意小数分频 -The program is based on VHDL language design divider, which includes half-integer divider 50 duty cycle is not odd frequency 50 duty cycle any fractional
Platform: | Size: 24576 | Author: qikaiyi | Hits:

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