Products Mentioned

ADE7763 Production
The ADE7763 features proprietary ADCs and fixed function DSP for high accuracy over large variations in environmental conditions and time. The ADE7763...
Datasheet
ADE7763 on Analog.com

ADE7753 Production
The ADE7753 features proprietary ADCs and DSP for high accuracy over large variations in environmental conditions and time. The ADE7753 incorporates two...
Datasheet
ADE7753 on Analog.com

Thread Details

  • State Verified Answer
  • Replies 10 replies
  • Subscribers 53 subscribers
  • Views 3783 views
  • Users 0 members are here
Options 

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
How to Calculate the power factor in ADE7763

		
	
				

			

									
					    KTomar766
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 11, 2020 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing issues with power factor calculation on the ADE7763/7753 IC, where the ratio of LAENERGY to LVAENERGY exceeds 1. The final answer suggests using IRMSOS and VRMSOS for RMS offset calibration, not CH2OS or CH1OS, and to verify connections and other measurements. The user also faces linearity problems in active power and issues with the WAVEFORM register fluctuating without a signal.
                        	    
    
                
                     AI Generated Content
                
    	    
    
             
				
        		
    
		    
		    		    
		    			
    
			    
    Dear Sir I am using ADE7763/7753 I want to know how to calculate the power factor as this ic don't give power factor directly
    

    If I do the ratio of LAENERGY AND LVAENERGY than I got value more than 1, which is not correct 
    

    Please help
    

    Regards Kuldeep
    

    
			
    
			
									
		                             
                        

    
    
                                            
                 ade7753
                
                                                    
                 Energy Metering ICs
                
                                                    
                 Integrated/Special Purpose A/D Converters
                
                                                    
                 ade7763
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



Parents
	
      
	

    • 
	
      



	
		
	
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jan 5, 2021 12:45 PM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      pg 35 of the ade7763 datasheet shows the scaling of active to va. www.analog.com/.../ADE7763.pdf
      

      pg 38 on the ade7753 datasheet www.analog.com/.../ADE7753.pdf
      

      

      pf = Lactive / (LVA / .848)
      

      

       
      

      Dave Smith
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

      • 

	

    • 
	
      



	
			
		
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jan 5, 2021 2:23 PM
            
            
												
						in reply to dave.smith
					
										
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      "2. Yes I am getting some offset ate VRMS and IRMS both which i am unable to remove by CH2OS or CH1OS so i just left it and calibrate Voltage and current with my meter and at all points it is shown OK"
      

      

      Use IRMSOS and VRMSOS for RMS offset calibration. Not CH2OS AND CH1OS
      

      

      Current channel as a HPF to remove DC offsets for the RMS calculation.  dc offset correction is not needed unless you are not using highpass filter
      

      The voltage channel does not. You can improve performance sometimes for active power by adjusting the voltage channel offset CH2OS. 
      

      

      Set CH1OS and CH2OS to 0x0    adj channel 2 offset register can cause active energy problems. 
      

      

      Are you using the temp sensor? If you are try not doing this does the active energy improve? 
      

      

      See if you energies are now linear. If better the errors were caused by the CHOS registers. Use IRMSOS and VRMSOS to calibrate RMS values. 
      

      You could have a cross talk issue on the PCB. 
      

      

      Dave
      

      

      

      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

      • 

	

    • 
	
      



	
		
	
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
        
            
						
                            
            
            				
            
                on Jan 7, 2023 8:41 PM
            
            
												
						in reply to dave.smith
					
										
			            		
        
		
										0
					
	
        

		
		
        
		
        
                                
                                                            
        
					
        Hi 
        

        I am unable to read waveform register properly
        

        It's too much fluctuating even i did not apply any signal 
        

        Please help 
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

        • 

	
      



Reply



Children
	
      No Data
      

		
			
      

      





		
      
		
      
			
        
				
      • 
					
												
						
						
						
						
						
						
						

																										
						
						

					
					
					
				
        •