Search Results for – "MOTOR"

Stepper Motor Classification

Stepper Motor Classification: The Stepper Motor Classification based on the construction and principle of operation. These are Variable reluctance motors Permanent magnet motors Hybrid stepping motors Claw pole motors with permanent magnets The stepper motors are used for linear motors also. These are also classified as ‘variable reluctance motors’ and ‘permanent magnet motors’. Variable Reluctance […]

Margin Angle Control of Synchronous Motors

Margin Angle Control of Synchronous Motors: The commutation Margin Angle Control of Synchronous Motors is defined as the angle measured from the end of commutation to the crossing of the phase voltage which was under commu­tation (natural firing instant). For satisfactory operation, without commuta­tion failure, this margin angle must be greater than the turn off […]

Microprocessor Control of a Current source Inverter Fed Synchronous Motor

Microprocessor Control of a Current source Inverter Fed Synchronous Motor: A drive system employing a Current source Inverter Fed Synchronous Motor has the following features: A four quadrant drive can be accomplished very easily. A self control, which synchronises the gating pulses of the inverter with rotor position, provides an improved steady-state and dynamic performance. […]

Microprocessor Control of Synchronous Motor Drives

Microprocessor Control of Synchronous Motor Drives: Variable speed drives employing Microprocessor Control of Synchronous Motor Drives are becoming very popu­lar in industrial applications. They are an immediate solution for high power reversible drives and are becoming competitors to dc and induction motor drives. The Microprocessor Control of Synchronous Motor Drives operates at leading power factors […]

Field Oriented Control of Three Phase Induction Motor

Field Oriented Control of Three Phase Induction Motor: The stator current of an induction motor has the functions of producing the required air gap flux (magnetisation) as well as developing the required torque to drive the load. An Field Oriented Control of Three Phase Induction Motor motor will have its operation similar to that of […]

Wound Rotor Induction Motor with Subsynchronous Converter Cascade

Wound Rotor Induction Motor with Subsynchronous Converter Cascade in the Rotor Circuit: The following points favour the application of a slip ring motor having static slip energy recovery scheme in the Subsynchronous Converter Cascade circuit, to drive a centrifugal pump (Fig. 7.10). 1.The delivery rate control of the pump is accomplished by speed control of the […]

Transfer Function of a Field Controlled DC Motor

Transfer Function of a Field Controlled DC Motor: The speed of a dc motor can be varied by varying the field current. The speed can be increased beyond base speed by decreasing the field current. The Fig. 6.8(c&d) shows the Transfer Function of a Field Controlled DC Motor. In this type of control constant torque operation […]

Transfer Function of Armature Controlled DC Motor

Transfer Function of Armature Controlled DC Motor: The speed of a dc motor can be controlled by varying the voltage applied to the armature of a dc motor. A separately excited dc motor with variable armature voltage finds application as a drive motor in a variable speed drive. The variable armature voltage is provided by […]

Closed Loop Control of DC Motor

Closed Loop Control of DC Motor: Closed Loop Control of DC Motor – The dynamic behaviour of a system is described by a set of differential equa­tions. On many occasions the solution of these equations requires the evalu­ation of convolution integrals which may be a difficult task. In such cases a simpler analysis is made […]

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