Targeted LTE Solutions for Siemens Generators
... Cases that might be considered “exceptional conditions” include: • Stress corrosion cracking due to chemical conditions that should not be the normal operating environment of large electrical generators. These include long-term exposure to saturated sodium chloride solution and exposure to bromine u ...
... Cases that might be considered “exceptional conditions” include: • Stress corrosion cracking due to chemical conditions that should not be the normal operating environment of large electrical generators. These include long-term exposure to saturated sodium chloride solution and exposure to bromine u ...
ON-LINE PARAMETER ESTIMATION IN INDUCTION MOTOR
... A hybrid electric vehicle (HEV) powertrain consists of both a mechanical power transmission path and an electric power transmission path. A supervisory vehicle controller generates the control commands for the subsystems in the powertrain based on the driver request and vehicle speed. Fuel efficienc ...
... A hybrid electric vehicle (HEV) powertrain consists of both a mechanical power transmission path and an electric power transmission path. A supervisory vehicle controller generates the control commands for the subsystems in the powertrain based on the driver request and vehicle speed. Fuel efficienc ...
chapter 1 - Εθνικό Μετσόβιο Πολυτεχνείο
... stepper motor can respond to a range of loads by providing a range of torque outputs at a fixed motor voltage for which the windings are sized. Thus, for each specific application of a stepper motor as an electromechanical actuator, the size of stepper motor selected is determined in large by the n ...
... stepper motor can respond to a range of loads by providing a range of torque outputs at a fixed motor voltage for which the windings are sized. Thus, for each specific application of a stepper motor as an electromechanical actuator, the size of stepper motor selected is determined in large by the n ...
Motors for Makers: A Guide to Steppers, Servos, and Other Electrical
... own electronic speed controls (ESCs) or programming their own robotic arms. This is perfectly understandable. Motors are more complicated than other circuit elements. With motors, you don’t just have to be concerned with electrical quantities such as voltage and current; you have to think about mech ...
... own electronic speed controls (ESCs) or programming their own robotic arms. This is perfectly understandable. Motors are more complicated than other circuit elements. With motors, you don’t just have to be concerned with electrical quantities such as voltage and current; you have to think about mech ...
UNIT 16 ELECTRIC MOTORS
... feeding system. Although the motor requires direct current, the supply is usually alternating current. A solidstate rectifier in the motor controller changes ac to de. One type of direct-current motor can also operate on alternating current. This type is called a universal m(;tor. Its most common ap ...
... feeding system. Although the motor requires direct current, the supply is usually alternating current. A solidstate rectifier in the motor controller changes ac to de. One type of direct-current motor can also operate on alternating current. This type is called a universal m(;tor. Its most common ap ...
ELECTROMAGNETIC FORCES ACTING BETWEEN THE STATOR
... Electrical machine designers and researchers in industry face increasing demands to consider many physical effects more accurately when they give birth to the next generation of electrical energy converters, such as electrical machines. The electrical machines used in variable speed drives and gener ...
... Electrical machine designers and researchers in industry face increasing demands to consider many physical effects more accurately when they give birth to the next generation of electrical energy converters, such as electrical machines. The electrical machines used in variable speed drives and gener ...
Troubleshooting Induction Motors
... all U.S. motor manufacturers design. NEMA recommends that a standard motor be capable of starting a 90% of rates voltage, which is assumed to be a typical line drop, but this is not always recognized for RVS. Due to this, it is always important that the true voltage at the motor terminals be given t ...
... all U.S. motor manufacturers design. NEMA recommends that a standard motor be capable of starting a 90% of rates voltage, which is assumed to be a typical line drop, but this is not always recognized for RVS. Due to this, it is always important that the true voltage at the motor terminals be given t ...
Question Bank 1. Electromagnetism 2. Magnetic Effects
... (c) (i) The points where the current enters, the magnetic lines of force are in the form of concentric circles. (ii) Within the space enclosed by the coil, the magnetic lines of force are in the same direction. (iii) The direction of the magnetic lines of force is at right angles to the direction of ...
... (c) (i) The points where the current enters, the magnetic lines of force are in the form of concentric circles. (ii) Within the space enclosed by the coil, the magnetic lines of force are in the same direction. (iii) The direction of the magnetic lines of force is at right angles to the direction of ...
Guidance on RCD`s
... that such RCDs do not form part of the fixed electrical installation. Such RCDs have a rated voltage not exceeding 250 V a.c. single-phase, a rated current not exceeding 16 A and a rated residual operating current not exceeding 30 mA. Portable RCDs should comply with BS 7071 Specification for portab ...
... that such RCDs do not form part of the fixed electrical installation. Such RCDs have a rated voltage not exceeding 250 V a.c. single-phase, a rated current not exceeding 16 A and a rated residual operating current not exceeding 30 mA. Portable RCDs should comply with BS 7071 Specification for portab ...
Commutator (electric)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.