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PM-CS24 Datasheet(PDF) 3 Page - Premier Magnetics, Inc. |
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PM-CS24 Datasheet(HTML) 3 Page - Premier Magnetics, Inc. |
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3 / 3 page  20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com Specifications subject to change without notice. 3 PM-CSXX CURRENT SENSE TRANSFORMERS RoHS APPLICATION EXAMPLE APPLICATION EXAMPLE GIVEN: Part# = PM-CI02 Peak Current (I PK) = 30.0 Amps Terminating Resistor (R T) = 100 Ohms Operating Frequency (f) = 100KHz Duty Cycle (Dmax) = .40 (40% on time) CALCULATE OPERATING FLUX DENSISTY From the Table the FLUX FACTOR is: K B = 68.49 x 10 3 Flux Utilization Constant (K F) is: 1.0 For Unipolar Operation 2.0 For Bipolar Operation THEN: B OP = KB x IPK x RT x (Dmax / KF x f) = 68.49x103 x 30 x 100 x (.4 / 1 x 100x103) = 822 gauss (OK less than 2000 gauss) CALCULATE PULSE DROOP From the Table the Secondary Inductance is: L S = 20mHy Minimum Note: The actual droop is dependent on the actual L S in the circuits enviorment. Droop Exponent (D) = R T x Dmax / (LS x f) = 100 x .4 / (20x10-3 x 100x103) = 0.020 THEN: %_Droop = (1-e-D) x 100 = 1.98 % OK less than 10% (Depending on the application Droop to 20% may be acceptable) CALCULATE THE SCALE FACTOR From the Table the Secondary Turns are: N S = 100 THEN: K V = R T / NS = 100 / 100 = 1 volt/amp ESTIMATE ERROR DUE TO LOSSES From the Table the Secondary DCR is: R S = 1.40 Ohms Maximum From the Table the approximate Loss Factor is: K L = 3.33 x 10 -9 Note: The loss factor (K L) is valid approximation from10KHz to 200KHz Secondary Copper Losses are: P_loss S = (I PK / NS ) 2 x R S = (30/100)2 x 1.40 = 0.126 Watt Core losses are: P_loss C = K L 2 x f1.621 x B OP 2.569 = (3.33x10-9)2 x (100x103)1.621 x 8222.569 = 0.0435 Watt Output Power is: P_out S = (I PK / NS ) 2 x R T = (30/100)2 x 100 = 9.00 Watt THEN: %_Error = [(P_loss S + P_lossC ) / P_out] x 100 = [(.126 + .0435) / 9] x 100 = 1.88 % |
Similar Part No. - PM-CS24 |
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Similar Description - PM-CS24 |
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