Unique Probe Measures Current in PCB Tracks
... True measurement of current requires the circuit to be broken and a current measurement device inserted (e.g. a shunt that converts current to voltage). Conventional DC capable current probes do not measure current, they measure field density. Current flowing through a conductor creates a magnetic ( ...
... True measurement of current requires the circuit to be broken and a current measurement device inserted (e.g. a shunt that converts current to voltage). Conventional DC capable current probes do not measure current, they measure field density. Current flowing through a conductor creates a magnetic ( ...
The Modelling , Simulation and Control of a 50 kW Vertical Axis
... unlike other generation systems, the power inflow rate is not controllable [3]. In most generation systems, the fuel flow rate, or the amount of energy, applied to the generator controls the output voltage and frequency. The power fluctuates with the variation of winds. The fact that there is no con ...
... unlike other generation systems, the power inflow rate is not controllable [3]. In most generation systems, the fuel flow rate, or the amount of energy, applied to the generator controls the output voltage and frequency. The power fluctuates with the variation of winds. The fact that there is no con ...
Basic Controls, 4-1 Friction Brakes
... motor in lifting appliances. They are also used to reduce motor stopping time and execute precise control. Friction brakes operate in a manner similar to automobile brakes. Braking is accomplished by friction surfaces (shoes or pads), which come in contact with a disk mounted on the motor shaft. A s ...
... motor in lifting appliances. They are also used to reduce motor stopping time and execute precise control. Friction brakes operate in a manner similar to automobile brakes. Braking is accomplished by friction surfaces (shoes or pads), which come in contact with a disk mounted on the motor shaft. A s ...
The drive may be seeing the motor acting as a generator
... increasing the decel time on ramp to stop on the inverter. Otherwise, Dynamic Braking may be needed. Useful Definitions: Regeneration: The characteristic of a motor when the rotor's synchronous frequency is greater than the applied frequency. Dynamic Braking: A system of electric braking in which th ...
... increasing the decel time on ramp to stop on the inverter. Otherwise, Dynamic Braking may be needed. Useful Definitions: Regeneration: The characteristic of a motor when the rotor's synchronous frequency is greater than the applied frequency. Dynamic Braking: A system of electric braking in which th ...
Homopolar motors : (~3040 min)
... STANDARD III: Students will understand that magnetism can be observed when there is an interaction between the magnetic fields of magnets or between a magnet and materials made of iron. Objective 1: Investigate and compare the behavior of magnetism using magnets. a. Compare various types of magnets ...
... STANDARD III: Students will understand that magnetism can be observed when there is an interaction between the magnetic fields of magnets or between a magnet and materials made of iron. Objective 1: Investigate and compare the behavior of magnetism using magnets. a. Compare various types of magnets ...
Cushion Pack© CP 430 S2+ Cardboard Shredder Electrical
... Let’s take the 480 Volt configuration and convert it to the running Amperage that you will need: 4,000 Watts divided by 480 Volts provides an electrical current of 8.33 running Amps. Now, let’s take the 240 Volt configuration and convert it to the running amperage that you will need: 4,000 Watts div ...
... Let’s take the 480 Volt configuration and convert it to the running Amperage that you will need: 4,000 Watts divided by 480 Volts provides an electrical current of 8.33 running Amps. Now, let’s take the 240 Volt configuration and convert it to the running amperage that you will need: 4,000 Watts div ...
Power System Protection
... * Should be selected by reference to the frequent-fault-incidence protection curve or for transformers serving industrial, commercial and institutional power systems with secondary-side conductors enclosed in conduit, bus duct, etc., the feeder protective device may be selected by reference to the i ...
... * Should be selected by reference to the frequent-fault-incidence protection curve or for transformers serving industrial, commercial and institutional power systems with secondary-side conductors enclosed in conduit, bus duct, etc., the feeder protective device may be selected by reference to the i ...
Aalborg Universitet Generators of Modern Wind Turbines Chen, Zhe
... makes it necessary to produce a higher torque. Therefore, for direct drive generators, the low speed and high torque operation require multi-pole, which demand a larger diameter for implementation of large number of poles with a reasonable pitch. Moreover, for a larger direct-drive generator, consid ...
... makes it necessary to produce a higher torque. Therefore, for direct drive generators, the low speed and high torque operation require multi-pole, which demand a larger diameter for implementation of large number of poles with a reasonable pitch. Moreover, for a larger direct-drive generator, consid ...
Minariks DC Drives - XP-DC Series - User Manual
... stops. Do not use any of these methods for emergency stopping. They may not stop a drive that is malfunctioning. Removing DC line power is the only acceptable method for emergency stopping. For this reason, Minarik Drives strongly recommends installing an emergency stop switch (see Connections on pa ...
... stops. Do not use any of these methods for emergency stopping. They may not stop a drive that is malfunctioning. Removing DC line power is the only acceptable method for emergency stopping. For this reason, Minarik Drives strongly recommends installing an emergency stop switch (see Connections on pa ...
variable speed drives and motors a gambica technical guide
... Current inputs, while fixed instruments can offer ±0.01%, however, the limitations of the current transducers will need to be taken into account as well. For fixed installations, where the bus bars can be correctly located or special shunts used an accuracy of ±0.1% is practical, while for portable ...
... Current inputs, while fixed instruments can offer ±0.01%, however, the limitations of the current transducers will need to be taken into account as well. For fixed installations, where the bus bars can be correctly located or special shunts used an accuracy of ±0.1% is practical, while for portable ...
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.