Appendix A: Experimental Apparatus
... (or ‘compact-rio’), the extra rotor resistance, current and voltage sensors and several contactors along with various circuit breakers and fuses to protect the machines from overload conditions. The variable autotransformer is the device on the middle shelf of the control unit. It can be thought of ...
... (or ‘compact-rio’), the extra rotor resistance, current and voltage sensors and several contactors along with various circuit breakers and fuses to protect the machines from overload conditions. The variable autotransformer is the device on the middle shelf of the control unit. It can be thought of ...
selection of electric motors for aerospace applications
... Stepper Motors. Table 1 shows the most predominant applications for each type of motor. Generally AC Induction Motors are used for constant speed applications where a fixed frequency power source such as 60 Hz or 400 Hz is available in the spacecraft. Typical applications are fans and pumps. Motor c ...
... Stepper Motors. Table 1 shows the most predominant applications for each type of motor. Generally AC Induction Motors are used for constant speed applications where a fixed frequency power source such as 60 Hz or 400 Hz is available in the spacecraft. Typical applications are fans and pumps. Motor c ...
Exercise 1 - Portal UniMAP
... 8. A 480 V 100 kW 0.85 PF leading 50 Hz six pole Y-connected synchronous motor has a synchronous reactance of 1.5 and a negligible armature resistance. The rotational losses are also to be ignored. This motor is to be operated over a continuous range of speeds from 300 to 1000 r/min, where the sp ...
... 8. A 480 V 100 kW 0.85 PF leading 50 Hz six pole Y-connected synchronous motor has a synchronous reactance of 1.5 and a negligible armature resistance. The rotational losses are also to be ignored. This motor is to be operated over a continuous range of speeds from 300 to 1000 r/min, where the sp ...
DEHRADUN INSTITUTE OF TECHNOLOGY LABORATORY MANUAL PRACTICAL INSTRUCTION SHEET
... SEMESTER : I / II ...
... SEMESTER : I / II ...
Motor Basics - PAControl.com
... synchronous speed and rated speed. • The rotor in an induction motor lags slightly behind the synchronous speed of the changing polarity of the magnetic field. – Low Slip Motors • “Stiff”….High Efficiency motors ...
... synchronous speed and rated speed. • The rotor in an induction motor lags slightly behind the synchronous speed of the changing polarity of the magnetic field. – Low Slip Motors • “Stiff”….High Efficiency motors ...
Electric Motors
... Introduction to Electric Motors Magnets are surrounded by magnetic fields and attract certain metals (iron, nickel, and cobalt). This magnetic effect comes from a special alignment of the atomic structure of the material. All magnets have two poles, a north pole and a south pole. It is impossible to ...
... Introduction to Electric Motors Magnets are surrounded by magnetic fields and attract certain metals (iron, nickel, and cobalt). This magnetic effect comes from a special alignment of the atomic structure of the material. All magnets have two poles, a north pole and a south pole. It is impossible to ...
ES205 Lab 4 - Modeling of a Motor-Generator Set - Rose
... The objective of this pre-lab exercise is to construct a Simulink model for a motor-generator set, where both machines are armature-controlled. Nominal system parameters are given . You will use this model for the lab. Introduction: Electric motors and generators are both machines which are used to ...
... The objective of this pre-lab exercise is to construct a Simulink model for a motor-generator set, where both machines are armature-controlled. Nominal system parameters are given . You will use this model for the lab. Introduction: Electric motors and generators are both machines which are used to ...
Document
... 16. The resistance measured between each pair of slip rings of a 3-phase 60-cps 300-hp 16-pole induction motor is 0.035 ohm. With the slip rings short circuited the full-load slip is 0.025, and it may be assumed that the slip-torque curve is a straight line from no load to full load. This motor driv ...
... 16. The resistance measured between each pair of slip rings of a 3-phase 60-cps 300-hp 16-pole induction motor is 0.035 ohm. With the slip rings short circuited the full-load slip is 0.025, and it may be assumed that the slip-torque curve is a straight line from no load to full load. This motor driv ...
- Switched Reluctance Drive Systems
... Due to the absence of rotor windings, SRM is very simple to construct, has a low inertia and allows an extremely high-speed operation. SRM operates in constant torque from zero speed up to the rated speed. Above rated speed up to a certain speed, the operation is in constant power. The range of this ...
... Due to the absence of rotor windings, SRM is very simple to construct, has a low inertia and allows an extremely high-speed operation. SRM operates in constant torque from zero speed up to the rated speed. Above rated speed up to a certain speed, the operation is in constant power. The range of this ...
- Muhazam
... be more than one windings hence it can generate more than 1 phase of electricity CO1 ...
... be more than one windings hence it can generate more than 1 phase of electricity CO1 ...
here
... product can be constant. On the basis of this, supply provided with normally sinusoidal voltage will require such an induction distribution and fit along the circumference. If this condition fails to occur pulsating torques are generated and the rate of such torques may show considerable differences ...
... product can be constant. On the basis of this, supply provided with normally sinusoidal voltage will require such an induction distribution and fit along the circumference. If this condition fails to occur pulsating torques are generated and the rate of such torques may show considerable differences ...
Elec467 Power Machines & Transformers
... graphs that share the x-axis in common. Speed and torque characteristics of the three DC motor types are compared. A Series motor is the most non-linear but are capable of extremely high torque at low speeds (with high current). Whatever a shunt motor can do…a compound motor can do better (slightly) ...
... graphs that share the x-axis in common. Speed and torque characteristics of the three DC motor types are compared. A Series motor is the most non-linear but are capable of extremely high torque at low speeds (with high current). Whatever a shunt motor can do…a compound motor can do better (slightly) ...
wound rotor machine fed by a single-phase grid
... performed by the machine side VSI only and the other functions, such as regulating the dc-link voltage and the grid current, are executed by the other parts. These parts lengthen the energy conversion sequence of the system. Doubly fed induction machine (DFIM), in which the stator and rotor windings ...
... performed by the machine side VSI only and the other functions, such as regulating the dc-link voltage and the grid current, are executed by the other parts. These parts lengthen the energy conversion sequence of the system. Doubly fed induction machine (DFIM), in which the stator and rotor windings ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.