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2. Specifications
... As previously stated, the half coil configuration uses 50% of the motor phase windings. This gives lower inductance, hence, lower torque output. Like the parallel connection of 8 lead motor, the torque output will be more stable at higher speeds. This configuration is also referred to as half choppe ...
... As previously stated, the half coil configuration uses 50% of the motor phase windings. This gives lower inductance, hence, lower torque output. Like the parallel connection of 8 lead motor, the torque output will be more stable at higher speeds. This configuration is also referred to as half choppe ...
NOVATORQUE® EC PERMANENT MAGNET MOTOR
... NovaTorque® motor’s innovative conical rotor/stator geometry produces rare-earth-like motor performance using inexpensive, readily available, ferrite magnets. They deliver a whole new class of electric motors that provide the performance of a permanent magnet motor at a cost more similar to premium ...
... NovaTorque® motor’s innovative conical rotor/stator geometry produces rare-earth-like motor performance using inexpensive, readily available, ferrite magnets. They deliver a whole new class of electric motors that provide the performance of a permanent magnet motor at a cost more similar to premium ...
ECE 431 Electric Machines Lab Manual
... The rotating parts of the machines on each bench are separated from laboratory workers by a plastic shield on the front and sides. Keep your bench close against a wall or against the rear of a second bench to prevent access to the rotating parts. The machines have been set up for your experiment, an ...
... The rotating parts of the machines on each bench are separated from laboratory workers by a plastic shield on the front and sides. Keep your bench close against a wall or against the rear of a second bench to prevent access to the rotating parts. The machines have been set up for your experiment, an ...
Selecting among DRV88xx devices to drive Brushed or Stepper
... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant informat ...
... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant informat ...
Direct torque control of doubly fed induction machine
... In this work, we use configuration shown in Fig 1. Each side of the DFIM is fed by an AC-to-AC converter with DClink. Both DC-link voltage levels are deduced from the DFIM design. The stator and the rotor windings have different voltage rating, therefore, a step-down transformer between the AC netwo ...
... In this work, we use configuration shown in Fig 1. Each side of the DFIM is fed by an AC-to-AC converter with DClink. Both DC-link voltage levels are deduced from the DFIM design. The stator and the rotor windings have different voltage rating, therefore, a step-down transformer between the AC netwo ...
Magnetic effect of current
... field. If the magnetic field around conductors is strong enough it will actually force the conductors to move. This is especially damaging when overhead transmission lines or conductor in a duct or on a cable tray have to carry abnormally large currents due to a fault in the system. Devices which ex ...
... field. If the magnetic field around conductors is strong enough it will actually force the conductors to move. This is especially damaging when overhead transmission lines or conductor in a duct or on a cable tray have to carry abnormally large currents due to a fault in the system. Devices which ex ...
AN-828 Increasing the High Speed Torque of
... Chopper drives increase the slew rates of the winding currents by applying VCC >> Vrated. Feedback-driven switching of the H-bridges holds the winding currents to the rated limit. Figure 11 shows the chopping states of a single H-bridge of a chopper drive. A low value resistor in the ground lead of ...
... Chopper drives increase the slew rates of the winding currents by applying VCC >> Vrated. Feedback-driven switching of the H-bridges holds the winding currents to the rated limit. Figure 11 shows the chopping states of a single H-bridge of a chopper drive. A low value resistor in the ground lead of ...
BabyBully Servo Amplifier
... continuously the most probable cause is incorrect motor to feedback pot phasing; correct by turning the symmetrical feedback pot connector around. If the unit becomes too hot to touch the plate or heatsink comfortably then cease operation and investigate the cause. Verify motor current under mechani ...
... continuously the most probable cause is incorrect motor to feedback pot phasing; correct by turning the symmetrical feedback pot connector around. If the unit becomes too hot to touch the plate or heatsink comfortably then cease operation and investigate the cause. Verify motor current under mechani ...
Navy Electricity and Electronics Training Series
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
TEXT 8 - Камышинский технологический институт
... electrons. It is the movement of these particles which produces the effects of heat and light. The pressure that forces these atomic particles to move, the effects they encounter opposition and how these forces are controlled are some of the principles of electricity. Accepted atomic theory states t ...
... electrons. It is the movement of these particles which produces the effects of heat and light. The pressure that forces these atomic particles to move, the effects they encounter opposition and how these forces are controlled are some of the principles of electricity. Accepted atomic theory states t ...
electrical machines ii - SK Engineering Academy
... Waveform of the emf can be approximately made to a sine wave and distorting harmonics can be reduced or totally eliminated. Conductor material , copper is saved in the back and front end connections due to less coil-span. Fractional slot winding with fractional number of slots/phase can be use ...
... Waveform of the emf can be approximately made to a sine wave and distorting harmonics can be reduced or totally eliminated. Conductor material , copper is saved in the back and front end connections due to less coil-span. Fractional slot winding with fractional number of slots/phase can be use ...
Starting Time Calculation for Induction Motor
... the heavy applications requirement. Some are considered large even in comparison to the total capacity of large industrial power systems. Starting of such large motors can cause adverse effects to any locally connected load, other motors and also to buses, which are electrically remote from the poin ...
... the heavy applications requirement. Some are considered large even in comparison to the total capacity of large industrial power systems. Starting of such large motors can cause adverse effects to any locally connected load, other motors and also to buses, which are electrically remote from the poin ...
stepper motor drive considerations, common
... seen in the power dissipation graphs in the data sheet. With these two devices, phase chopping will always provide lower dissipation in the device. For discrete bridges the switching loss and saturation losses should be evaluated to determine which is lower. MINIMUM CURRENT The minimum current that ...
... seen in the power dissipation graphs in the data sheet. With these two devices, phase chopping will always provide lower dissipation in the device. For discrete bridges the switching loss and saturation losses should be evaluated to determine which is lower. MINIMUM CURRENT The minimum current that ...
Comparison of energy efficiency determination methods for the
... international standards, namely, the IEEE Std. 112, IEC 60034-2-1 (direct method), JEC 37 and the GOST 25941-83. The direct method IEC 60034-2-1 and IEEE Std. 112 result in the lowest efficiency. The difference comes from the different treatments of the stray load losses. The IEEE Std. 112 derives i ...
... international standards, namely, the IEEE Std. 112, IEC 60034-2-1 (direct method), JEC 37 and the GOST 25941-83. The direct method IEC 60034-2-1 and IEEE Std. 112 result in the lowest efficiency. The difference comes from the different treatments of the stray load losses. The IEEE Std. 112 derives i ...
Answers Electrical Motor Controls Chapter 4
... 9. What is a mechanical interlock for a manual starter? Contacts arranged so both sets of contacts cannot be energized at the same time 10. What is a locked rotor condition for a motor? Motor loaded so heavy the shaft cannot turn 11. What are the three stages of a motor operation? Resting, starting, ...
... 9. What is a mechanical interlock for a manual starter? Contacts arranged so both sets of contacts cannot be energized at the same time 10. What is a locked rotor condition for a motor? Motor loaded so heavy the shaft cannot turn 11. What are the three stages of a motor operation? Resting, starting, ...
Commutator (electric)
![](https://commons.wikimedia.org/wiki/Special:FilePath/Universal_motor_commutator.jpg?width=300)
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.