2A. Two similar inductive coils with negligible resistance are wound
... 5B. A 30KVA, 2400/120 V, 50Hz transformer has high voltage winding resistance of 4.5 Ω and leakage reactance of 10 Ω. The corresponding values on low voltage winding are 0.01 Ω and 0.025 Ω. The iron losses are 1.5 KW. Calculate (a) equivalent impedance referred to high voltage ...
... 5B. A 30KVA, 2400/120 V, 50Hz transformer has high voltage winding resistance of 4.5 Ω and leakage reactance of 10 Ω. The corresponding values on low voltage winding are 0.01 Ω and 0.025 Ω. The iron losses are 1.5 KW. Calculate (a) equivalent impedance referred to high voltage ...
Ski 2006-Part1
... …if you could limit the pressure of the system by changing the speed of the pump? ...
... …if you could limit the pressure of the system by changing the speed of the pump? ...
Turnigy RotoMax 150cc datasheet
... magnetic field as the magnetic path changes as the magnets pass each pole. In the test set up the DC voltage controls speed so there is no additional PWM switching and hence loss. The motor features slots in the stator with chamfered edges which appear to act like an extraction fan, giving some cool ...
... magnetic field as the magnetic path changes as the magnets pass each pole. In the test set up the DC voltage controls speed so there is no additional PWM switching and hence loss. The motor features slots in the stator with chamfered edges which appear to act like an extraction fan, giving some cool ...
March
... 5. The most common source of excitation for synchronous motors is a/an _____________. (A) low voltage battery (B) motor attenuator set (C) DC exciter generator (D) AC supply Briefly Justify your Answer SECTION - 2 6. A 6600/440-volt single-phase transformer is rated at 125 kVA and works on a 50 cycl ...
... 5. The most common source of excitation for synchronous motors is a/an _____________. (A) low voltage battery (B) motor attenuator set (C) DC exciter generator (D) AC supply Briefly Justify your Answer SECTION - 2 6. A 6600/440-volt single-phase transformer is rated at 125 kVA and works on a 50 cycl ...
Handout for ALTIVAR 18 AC Drives
... Acceleration and deceleration ramps: Linear ramps which can be adjusted separately from 0.1 to 3,600 seconds. Automatic adaptation of ramp times if the torque capacity is exceeded. Voltage/frequency ratio: Factory set for most constant torque applications with sensorless flux vector control. Adjustm ...
... Acceleration and deceleration ramps: Linear ramps which can be adjusted separately from 0.1 to 3,600 seconds. Automatic adaptation of ramp times if the torque capacity is exceeded. Voltage/frequency ratio: Factory set for most constant torque applications with sensorless flux vector control. Adjustm ...
DC Motors and Generators
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
Abstract - theelectromech.in
... general a.c. inductive/resistive load) with varying a.c. voltage at the start. Similar to triac control, voltage applied to load is varied from zero to maximum value in a small span of time during start. On the other hand, it uses a pulse width modulation technique (PWM), and when compared with phas ...
... general a.c. inductive/resistive load) with varying a.c. voltage at the start. Similar to triac control, voltage applied to load is varied from zero to maximum value in a small span of time during start. On the other hand, it uses a pulse width modulation technique (PWM), and when compared with phas ...
Everything you wanted to know about stepper motors
... Soft iron or so called low reluctance, often a material such as ferrite is usedusually higher speeds but lower torques. These motors spin quite freely when turned by hand. ...
... Soft iron or so called low reluctance, often a material such as ferrite is usedusually higher speeds but lower torques. These motors spin quite freely when turned by hand. ...
everything you wanted to know about stepper motors
... Soft iron or so called low reluctance, often a material such as ferrite is usedusually higher speeds but lower torques. These motors spin quite freely when turned by hand. ...
... Soft iron or so called low reluctance, often a material such as ferrite is usedusually higher speeds but lower torques. These motors spin quite freely when turned by hand. ...
Snímek 1
... The rotary field created by the stator has a higher speed than rotor revs. The basis of asynchronous motor function is a creation of the rotary magnetic field, which comes from the alternating current passing through the winding of the stator. This magnetic field induces the voltage in the rotor and ...
... The rotary field created by the stator has a higher speed than rotor revs. The basis of asynchronous motor function is a creation of the rotary magnetic field, which comes from the alternating current passing through the winding of the stator. This magnetic field induces the voltage in the rotor and ...
Stepper Motor Driver
... The numbers here refer to the numbers of the sockets on the motor connector. Sockets 5 and 6 are both connected to the positive of the motor supply. The motor driver is connected to the parallel port of a computer. A program is required to run the motors. The program simply sends a series of numbers ...
... The numbers here refer to the numbers of the sockets on the motor connector. Sockets 5 and 6 are both connected to the positive of the motor supply. The motor driver is connected to the parallel port of a computer. A program is required to run the motors. The program simply sends a series of numbers ...
AVOP-ELEKTRO-SKA-006
... rotary electric machine where it‘s magnetic circuit is divided by the small gap into two parts: the stator and the rotor. Both parts have a winding. One winding (usually on the stator) is connected to the source of the alternating current and the other (usually on the rotor) is connected on short di ...
... rotary electric machine where it‘s magnetic circuit is divided by the small gap into two parts: the stator and the rotor. Both parts have a winding. One winding (usually on the stator) is connected to the source of the alternating current and the other (usually on the rotor) is connected on short di ...
A-10 - IndiaStudyChannel.com
... b. A 240-V, 20 hP, 850 r.p.m., shunt motor draws 72A when operating under rated conditions. The respective resistance of the armature and shunt field are 0.242 ohm and 95.2 ohms, respectively. Determine the percent reduction in the field flux required to obtain a speed of 1650 r.p.m., while drawing ...
... b. A 240-V, 20 hP, 850 r.p.m., shunt motor draws 72A when operating under rated conditions. The respective resistance of the armature and shunt field are 0.242 ohm and 95.2 ohms, respectively. Determine the percent reduction in the field flux required to obtain a speed of 1650 r.p.m., while drawing ...
hybrid stepper motors
... Stepper motors provide the maximum performance available. This patent pending technology boosts torque up to 40% across the operating speed range and allows machines to be designed that are smaller and move faster. Initial system costs are often less with enhanced motors because the additional torqu ...
... Stepper motors provide the maximum performance available. This patent pending technology boosts torque up to 40% across the operating speed range and allows machines to be designed that are smaller and move faster. Initial system costs are often less with enhanced motors because the additional torqu ...
Excitation Sequence of Stepping Motor and Driver
... incorporating a special excitation sequence. This combination, which is proprietary to Oriental Motor, offers the following benefits: 䡠 Simple connections for five leads ...
... incorporating a special excitation sequence. This combination, which is proprietary to Oriental Motor, offers the following benefits: 䡠 Simple connections for five leads ...
Stepper motor
A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed.Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.