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1. And private firms have a common interest is the development of a satisfactory Commutatorless motor; commutation difficulties with rectified d.c

Common, Commutatorless, Commutation

2. Commutatorless Series Motor Drive for High Power Applications: Development, Design, Analysis, Simulation Models and Hardware Implementation [Mukherjee, Kaushik, SenGupta, S., K

Commutatorless

3. Commutatorless Series Motor Drive for High Power Applications: Development, Design, Analysis, Simulation Models and Hardware Implementation

Commutatorless

4. THE Commutatorless D C MOTOR WITH THREE-PHASE CURRENT EXCITATION A

Commutatorless, Current

5. Lauger Institut für Leistungselektronik und Anlagentechnik, Universität Stuttgart, FRG SUMMARY The Commutatorless d

Commutatorless

6. 4, JULY/AUGUST 1997 An Inverter-Fed Self-Controlled Commutatorless Series Motor with the Field Winding in the DC Link Sabyasachi SenGupta, Member, IEEE, Sailendra N

Controlled, Commutatorless

7. A Commutatorless DC machine has axially oriented magnetic flux in the air gaps between interleaved stator and rotor disks, and the rotor disks carry one or more radially oriented armature winding elements consisting of electrical conductors serially interconnected in serpentine fashion and terminated at a pair of slip rings

Commutatorless, Carry, Consisting, Conductors

8. With this method, the full con-controlled rectifier-based load-commutated inverter-driven synergic effects of space harmonics resulting from the magnetic circuit Commutatorless series motor to predict its speed-current, torque-current, geometry, saliency, saturation, winding layouts, and slotting are in- and torque-speed characteristics.

Con, Controlled, Commutated, Circuit, Commutatorless, Current, Characteristics

9. This paper presents a simplified analytical model of a silicon-controlled rectifier-based load-commutated inverter-driven Commutatorless series motor to predict its speed-current, torque-current

Controlled, Commutated, Commutatorless, Current

10. Commutatorless motors have the advantages of both dc and a c motors

Commutatorless

11. So far, the effect of pole saliency on the operating characteristics of natural commutation-type Commutatorless motors has been analyzed assuming that the dc reactor has so large an inductance that the dc input current is flat [l].

Characteristics, Commutation, Commutatorless, Current

12. Use of a Commutatorless motor (CLM) for traction on cars of Japanese high speed trains would aid in eliminating flashovers that result when snow conditions are encountered

Commutatorless, Clm, Cars, Conditions

13. The first patent for what was then called a “Commutatorless DC motor” was claimed by Harrison Brailsford in 1955

Called, Commutatorless, Claimed

14. Constant margin-angle control is a triggering scheme that can eliminate the commutation failure and increase the power factor and efficiency of Commutatorless motors

Constant, Control, Can, Commutation, Commutatorless

15. A Commutatorless motor having a stator comprised of field poles of constant magnetic field arranged with alternate polarities

Commutatorless, Comprised, Constant

16. Abstract: A large volume of research has been done to analyze Commutatorless dc motors using salient-pole synchronous-type machines

Commutatorless

17. THE Commutatorless motor (CLM) is a synchronous motor fed by a current source inverter, where the constant margin-angle control scheme has been proposed for the improvement of the motor performances, i.e., elimination of commutation failure and increase in power factor and effi­ ciency [1], [2].

Commutatorless, Clm, Current, Constant, Control, Commutation, Ciency

18. Summary At present, induction motor drives are the most mature technology among various Commutatorless motor drives

Commutatorless

19. Digital control of a variable-speed, thyristor-controlled, Commutatorless machine Cox, A

Control, Controlled, Commutatorless, Cox

20. SUBSTANCE: proposed single-phase Commutatorless repulsion motor has stator carrying field winding, toroidal magnet, and rotor carrying armature winding assembled of electrically interconnected coils

Commutatorless, Carrying, Coils

21. By 1885 the first alternating current Commutatorless induction motor was invented, and improved upon in 1886

Current, Commutatorless

22. The Commutatorless motor is superior to tbe conventional dc motor in maintenance, high-speed operation and manufacture of largecapacity motor

Commutatorless, Conventional

23. Although the steady-state characteristics of the Commutatorless motor have been studied extensively so far, …

Characteristics, Commutatorless

24. This device can be configured to provide either a stationary field Commutatorless

Can, Configured, Commutatorless

25. Four forced commutation methods of constant-current inverters for Commutatorless motors (CLM) were studied

Commutation, Constant, Current, Commutatorless, Clm

26. Cycloconverter-type Commutatorless motors having shunt and series characteristics are treated

Cycloconverter, Commutatorless, Characteristics

27. "Commutatorless" alternating current induction motors seem to have been independently invented by Galileo Ferraris and Nikola Tesla

Commutatorless, Current

28. ANALYSIS OF Commutatorless MOTOR WITH CYCLO-CONVERTER

Commutatorless, Cyclo, Converter

29. Use of a Commutatorless motor (CLM) for traction on cars of Japanese high speed trains would aid in eliminating flashovers that result when snow conditions are encountered

Commutatorless, Clm, Cars, Conditions

30.Commutatorless motors • DC Motor Drives • Induction Motor Drives • Permanent Magnetic Brushless Motor Drives • Switched Reluctance Motor Drives • Performance Curve of Electric Motors vs

Commutatorless, Curve

31. Control device for Commutatorless motor

Control, Commutatorless

32. Constant margin angle control of Commutatorless motor using table look‐up method

Constant, Control, Commutatorless

33. The AC Commutatorless, hyposynchronous wound-rotor motor, frequency converter and adjustable-ratio transformer were first combined into a single structure by K H Schrage of Sweden to provide a complete, self-contained, adjustable-speed EM motor (Laughton and Say 1985)

Commutatorless, Converter, Combined, Complete, Contained

34. A burn-out preventive circuit for a Commutatorless motor comprises drive windings of two phases, driving power transistors connected in series with the drive windings respectively, a position detecting element detecting the angular position of rotation of a permanent magnet rotor for alternately turning on the driving power transistors, and a protective circuit detecting a counter

Circuit, Commutatorless, Comprises, Connected, Counter

35. The design and predicted performance of a synchronous motor optimised for operation as a Commutatorless series motor (CLSM) is described

Commutatorless, Clsm

36. Commutatorless motors Commutatorless electric motors can have contact rings with brushes, so do not confuse Commutatorless electric motors and brushless electric motors

Commutatorless, Can, Contact, Confuse

37. This paper proposes a simplified analytical averaged model of a thyristorized Commutatorless series motor (CLSM)

Commutatorless, Clsm

38. Also reviews arc drives, brushless and Commutatorless dc drives, and rectifier controlled dc drives

Commutatorless, Controlled

39. The load commutated inverter (LCI)-fed synchronous motor (SM) drive, also known as Commutatorless motor (CLM) drive, is popular in high power applications

Commutated, Commutatorless, Clm

40. The first alternating-current Commutatorless induction motors have been independently invented by Galileo Ferraris and Nikola Tesla, a working motor model having been demonstrated by the former in 1885 and by the latter in 1887

Current, Commutatorless

41. At first, the Commutatorless motor can be classified into two great divisions accordlng to the commutating action

Commutatorless, Can, Classified, Commutating

42. Also reviews arc drives, brushless and Commutatorless dc drives, and rectifier controlled dc drives

Commutatorless, Controlled

43. Commutatorless motgrs are widely used in industries as excellent variable speed motors

Commutatorless

44. We proposed in a previous paper a Commutatorless motor of armature-field perpendicular type which can eliminate this torque pulsation

Commutatorless, Can

45. Than standard AC Commutatorless dynamotors, and the high-current part (the ‘armature’) of the MCM AC–DC/DC–AC commutator dynamotor is on the rotor

Commutatorless, Current, Commutator

46. Cycloconverter-type Commutatorless motors having shunt and series characteristics are treated

Cycloconverter, Commutatorless, Characteristics

47. Presents background information and details for classroom instruction for the following activities: plotting two-dimensional magnetic fields, making the reed switch and the reed relay, building a ribbon and moving coil loudspeaker, and investigations of a toy Commutatorless electric motor.

Classroom, Coil, Commutatorless

48. Speed sensors in Commutatorless electric motors

Commutatorless

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Frequently Asked Questions

Can a brushless DC motor be used with a mechanical commutator?

Today, brushed motors are only used in low power applications or where only DC is available, but the above drawbacks limit their use even in these applications. In brushless DC motors, an electronic servo system replaces the mechanical commutator contacts.

What are the disadvantages of using a commutator?

As the rotor rotates, the commutator selects different windings and the directional current is applied to a given winding such that the rotor's magnetic field remains misaligned with the stator and creates a torque in one direction. The commutator has disadvantages that has led to a decline in use of brushed motors. These disadvantages are:

Are brushless motors more efficient than brushed motors?

The maximum power that can be applied to a brushless motor is limited almost exclusively by heat; too much heat weakens the magnets and will damage the winding's insulation. When converting electricity into mechanical power, brushless motors are more efficient than brushed motors.