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Electrical drives and power electronics TESTS · The synchronous machines are associated with the names of Ferraris · Name the scientists who first studied electrical phenomena Coulomb · The DC machines are associated with the names of Jacobi Henry · The leading companies in the world market of electrical drive engineering are Mitsubishi · · The electromagnetic torque is born in air gap · What kind of drives the majority of drive systems present low accuracy · The induction machines are associated with the names of Dolivo-Dobrovolsky Tesla · One of the first eletrical motors has been built by Jacobi · Electromagnetic efficiency is measured in tesla · Time constants are measured by ms s hours · Who is the author of the first electrical motor Henry · Which rectifier cannot be built without a transformer 3-phase midpoint · Call the benefits of 3-phase rectifiers upon the 1-phase ones output voltage · Which rectifier has more diodes 3-phase bridge · In th
3. Quiz on Electrical Drive Motors and Models 1. What types of motors have the single-sided excitation? -(linear) synchronous 2. What types of motors have the dc excitation? - 3. What types of motors have the permanent magnet excitation? -synchronous, DC 4. What types of motors have the dc supply? -DC, synchronous 5. What types of motors have the slip rings? -induction 6. What types of motors are the brushless motors? -DC, synchronous 7. What orthogonal reference frames do you know? -(,)stator; (d,q)rotor;(x,y)arbitrary 8. What natural reference frames do you know? -3 phase 9. What stationary reference frames do you know? -stator 10. Write the frequency equilibriums that you know. -induction:w1=w2+w12;synchronous:w1=w12;DC:w2=-w12 11. What is the result of the mutual motion of the stator and rotor windings? -torque??? 12. What variables does the flux depend on? -L12 I12? L ja I 13. Write the formulae of the synchronous speed. -2*pii*f1/p 14. Write the formulae of the motor speed. -2*pi
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 1 on General Course of Electrical Drive SENSORLESS DRIVE POWER FLEX (ALLEN BRADLEY) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram 2. Tables of observations Task Operation/Record Observation 1 Reverse the motor speed. How long Time to reverse was 16 does the motor reverse? seconds 2 2: Set the screen display an Output Minimal: 2.8V Voltage of the inverter. Turning the Maximal: 166V potentiometer, find accessible minimal and maximal voltages. Stop the drive. 3 3 Turn the keypad potentiometer half- Reverse ti
Similar considerations apply to other buses, such as PCI and Compact PCI. EMC Almost every microprocessor-based design will have to undergo EMC (elec- tromagnetic compatibility) testing before it can be sold in the United States or Europe. EMC regulations limit the amount of energy the product can emit, to prevent interference with other equipment such as televisions and radios. Generally, the higher the clock rates are, the more emissions the equipment generates. Current EMC standards test radiated emissions in the frequency range between 30 MHz and 1 GHz. A processor running with a 6 MHz clock will not have any fundamental emissions in this range; the only frequencies in the test range will be those from the fifth and higher harmonics of the proces- sor clock. The higher harmonics typically have less energy. On the other hand, a 33 MHz processor will produce energy in the test band from its fundamen- tal frequency and higher
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 4 on General Course of Electrical Drive INDUCTION MOTOR DRIVE (LUCAS-NÜLLE) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Nameplate data: Loading Machine SO3636- VDE 0530 IP:5 Is.KL: 6V 4 F U: 390V I: 4,4 A 4Nm/1.7k cos: W 4050 1/min f: 140 Hz Induction motor: SE2663-1K VDE 0530 IP: 20 Is.KL: F /Y U: 230/400V I: 1,7 / 1,0A Mot.DS 0,30 kW cos: 0.76 1400 1/min f: 50Hz 4. Tables of o
Microcontroller homework for week 12 1. Three different stepper motors (illustrations on page 162-163): · permanent-magnet, · variablereluctance, · hybrid. The VR stepper has a soft iron rotor with teethand a wound stator. As current is applied to two opposing stator coils, the rotor is pulled into alignment with these twocoils. As the next pair of coils is energized, the rotor advances to the next position. The permanent magnet (PM) stepper has a rotor with alternating north and south. As the coils are energized, the rotor is pulled around. This figure shows a single coil to illustrate the concept, but a realstepper would have stator windings surrounding the rotor. The PM stepper has more torque than an equivalent VR stepper. The hybrid stepper essentially adds teeth to a permanent magnet motor,resulting in better coupling of the magnetic field into the rotor and moreprecise movement. In a hybrid stepper, the rotor is split into two parts, anupper and lo
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 3 on General Course of Electrical Drive SERVO DRIVE (FESTO) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Component list: PC with Wmmemoc software SEC-AC-305 controller MTR-AC-55 servo motor with encoder External 24VDC power supply unit Test stand with slide and limit switches 4. Tables of observations Task Operation/Record Observation 1 Measure the slide position at Limit Slide moved to the right, switch 1 Limit 1 reached at 1,46 2 Turn potentiometer slowly counter- Slide sta
. . . . . .26 breaker distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Oil filler cap cleaning - OHV and HCS engines . . . . . . . . . . . . . . . . .7 Contact breaker points renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Rear brake shoe lining check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Coolant renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Road test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 Crankcase emission control filter renewal . . . . . . . . . . . . . . . . . . . .35 Roadwheel check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Distributor lubrication - models with contact breaker distributor . .12 Seat belt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
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