AFC-2D Magnetic Powder Brake & Electronic Control Didactic Equipment Electrical Laboratory Equipment
This brake enables the measure of the mechanical and electrical characteristics of electrical motors and allows plotting the Torque = f (RPM) curve and calculating the real Pmec(W) developed by the motor. TECHNICAL SPECIFICATIONS: MAGNETIC POWDER BRAKE • Braking torque range: up to 30 Nm. With max torque limiter. • Speed range: up to 6000 RPM. With min speed limiter. • Power range: from 0,75 to 1.5 KW • Integrated thermal protector and fan • Includes the RPM probe and the bidirectional Torque probe. • The unit is ready to be directly coupled to the “POWER”motors line (1 kW), over the same support base mod. BP(not included). Dimensions: 400 x 260 x 300 mm Weight: 30 kg ELECTRONIC CONTROL BOARD • Supplies the power to the Brake unit and processes thesignals of the RPM, Torque and Temperature probes. • Braking Modes: EXTERNAL, MANUAL, AUTO (with 4 selectablebraking curves): a) Constant Torque vs. RPM. It is the MANUAL mode, with T =k1 , being k1: a constant that can be set at different values.This curve is typical of elevators and cranes, conveyor belts etc. b) Linear Torque vs. RPM (T = k2 * n (RPM), being k2: aconstant that can be set at different values). This curve istypical of calenders, used in textile , paper and metallurgy industries. c) Quadratic Torque vs. RPM (T = k3 * n2 (RPM), being k3: aconstant that can be set at different values). This curve istypical of centrifugal pumps, centrifugal fans etc. d) Inverse Torque vs. RPM (T = k4 / n (RPM), being k4: aconstant that can be set at different values). This curve istypical of lathes, cutting machines, reel-type machines etc. • The braking time is settable, to define constants k2, k3and k4. • For each braking mode, it is possible to set the UNDER SPEEDand OVER TORQUE limiters for safe tests. One 3-states LEDfor signaling: READY, RUN and OVERTEMPERATURE. • The unit supplies 2 * 0-10 VDC analog outputs (bothprogrammable among any internal measured or calculatedparameter): for example, one can be proportional to RPM and the second proportional to Torque. These signals can be usedas inputs for other instruments (our CEM-U ComputerizedMeasurement Unit, or any already existing instrument). • Possibility of external control with a 0-10 V D.C signal. • On-board programmable multifunction instrument. It can beselected for: a) AC (single-ph or 3-ph balanced): measures V, I, W, VAr, VA,frequency and Power Factor. b) DC: measures V, I W • Backlit digital display and keyboard for programming theinstrument and to show the set / measured / calculatedparameters, such as: Torque (Nm), RPM, Pmec (W), Pel (W),Effi ciency etc. Dimensions: 400 x 160 x 250 mm Weight: 7 kg Supply with THEORETICAL – EXPERIMENTAL HANDBOOK
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