Three-phase asynchronous motor current sampling hardware circuit

Stator Motors Rotor 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Brand Name: FUJIAN DONGFENG MACHINERY ELECTRICAL LIABILITY CO., LTD

Current sampling hardware circuit as shown in figure 5, three-phase asynchronous motor current sampling resistance R7_1 for 3 m - liuyunqian @ yeah - embedded learning sampling resistor, take its at the ends of the voltage input 7860, to 7860 MC7805 input A steady supply of 5 v power supply, R9 and C4 RC low-pass filter, through A/D conversion isolation output frequency modulation for 10 MHZ clock and A data flow, by the transformation of the interface chip 0872 processing, signal output CS, SDAT and SCLK motor spare parts road, access to the SPI interface of DSP, read 15 digital quantity. HCPL27840 chip is agilent an isolation amplifier, it has superior performance, like the CMRR, offset voltage, nonlinearity, working temperature range and voltage have strict index, etc. Disorder of low offset voltage and low temperature coefficient allows precise generator set spare parts use of automatic calibration technology. Tolerance of the gain of 5% and 0.1% of linearity, provides accurate feedback and control further performance requirements. 


Y2 series electric motor wholesale

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 
4. low noise and vibtration 

5. AC Voltage: 220V/380V, 380V/660V,400V/690V,220V/400V

Wide temperature range allows HCPL7840 to be applied to all kinds of bad working environment. HCPL - 7840 consists of A three-phase asynchronous motor current sampling resistance - liuyunqian @ yeah - embedded learning A/D converter, also match have A D/A converter, the principle as shown in figure 7, input electricalmotor1.blogspot.com dc signal through the three-phase asynchronous motor current sampling resistance - liuyunqian @ yeah - embedded learning modulator to the encoder quantization and coding, under the clock signal control, in the form of digital string passed to the light emitting diode, drive leds light. Due to the current strength is different, have different luminous intensity, the demodulation side has A photocell will detect the change, will receive the light signal into electrical signal, and then sent to the decoder and D/A AC synchronous generator converters back into analog signals, after filtering the output. Jamming signals due to the current weak enough to drive leds luminous, and therefore there is no corresponding electrical signal output on demodulation, thus suppressed. So on the output side get effective dc signal is magnified.