ADVANCES IN INTERPRETING PARTIAL DISCHARGE TEST RESULTS FROM
... comparison of test results to the database allows a rough assessment of the stator winding insulation condition, without having to wait a few years for a trend to establish itself. However, the best assessment of the winding condition is still obtained from the trend in PD on a single machine over t ...
... comparison of test results to the database allows a rough assessment of the stator winding insulation condition, without having to wait a few years for a trend to establish itself. However, the best assessment of the winding condition is still obtained from the trend in PD on a single machine over t ...
DC Drive Selection Guide
... The KBMG Series of DC Drives consist of two models rated for 1/100 to 2 horsepower motors. This chassis ultra-compact, full-wave regenerative drive is capable of operating DC PM or Shunt motors in a bidirectional mode. Its 4-quadrant operation provides forward and reverse torque in both speed direct ...
... The KBMG Series of DC Drives consist of two models rated for 1/100 to 2 horsepower motors. This chassis ultra-compact, full-wave regenerative drive is capable of operating DC PM or Shunt motors in a bidirectional mode. Its 4-quadrant operation provides forward and reverse torque in both speed direct ...
Polyphase AC Induction Motor TROUBLESHOOTING GUIDE
... Step 2: If it will not start, go to Trouble 2, page 6. If it does start, ALWAYS determine the cause of the trouble beginning with Section 5, pages 12 and 13. Step 3: If the cause of the overheating was not located during Steps 1 and 2, proceed with Causes 7a through 7f. NOTE: Thermostats and Thermis ...
... Step 2: If it will not start, go to Trouble 2, page 6. If it does start, ALWAYS determine the cause of the trouble beginning with Section 5, pages 12 and 13. Step 3: If the cause of the overheating was not located during Steps 1 and 2, proceed with Causes 7a through 7f. NOTE: Thermostats and Thermis ...
Essentials of Rotating Electrical Machines
... laminated steel sheets to give optimum electrical and magnetic characteristics. Air-gap: Coupling between electrical and mechanical systems is through the electro- magnetic field in the air-gap Flux φ: is the common flux crosses from one core to another through the airgap, causing alternate N & S po ...
... laminated steel sheets to give optimum electrical and magnetic characteristics. Air-gap: Coupling between electrical and mechanical systems is through the electro- magnetic field in the air-gap Flux φ: is the common flux crosses from one core to another through the airgap, causing alternate N & S po ...
excerpt
... From the above data, it can be seen that 44% of motor failure problems are related to HEAT. Allowing a motor to reach and operate at a temperature 10°C above its maximum temperature rating will reduce the motor’s expected life by 50%. Operating at 10°C above this, the motor’s life will be reduced ag ...
... From the above data, it can be seen that 44% of motor failure problems are related to HEAT. Allowing a motor to reach and operate at a temperature 10°C above its maximum temperature rating will reduce the motor’s expected life by 50%. Operating at 10°C above this, the motor’s life will be reduced ag ...
AC and DC Drives for Oil Drilling
... drives can demand more power than is currently available. In this case the diesel generator has to be reliably protected. However, an additional more stringent requirement is that the drives operate automatically without demanding more power than is available. Although the generator can protect itse ...
... drives can demand more power than is currently available. In this case the diesel generator has to be reliably protected. However, an additional more stringent requirement is that the drives operate automatically without demanding more power than is available. Although the generator can protect itse ...
Floppy Disk Drive
... direction signals to the drive. These step and direction pulses are applied to a bi-directional shift register. The shift register produces a train of pulses (4 pulses) in order to rotate the stepper motor in the clockwise direction. To rotate the motor in anti-clockwise direction, the pulse sequenc ...
... direction signals to the drive. These step and direction pulses are applied to a bi-directional shift register. The shift register produces a train of pulses (4 pulses) in order to rotate the stepper motor in the clockwise direction. To rotate the motor in anti-clockwise direction, the pulse sequenc ...
Basic Electrical Engineering for HVAC Engineers
... 3. A "load" that needs electrical power to operate, such as a lamp. The current flows to the devices (called loads) through a “hot” wire and returns via a “neutral” wire because under normal conditions it’s maintained at zero volts, or what is referred to as ground potential. There are also two opti ...
... 3. A "load" that needs electrical power to operate, such as a lamp. The current flows to the devices (called loads) through a “hot” wire and returns via a “neutral” wire because under normal conditions it’s maintained at zero volts, or what is referred to as ground potential. There are also two opti ...
Introduction to Technical Mathematics
... Because the wound rotor induction motor is similar to the squirrel-cage induction motor, it is used in similar applications. However, the wound rotor induction motor is seen more often in applications where some speed or torque control is needed. As discussed earlier, we can manipulate the torque of ...
... Because the wound rotor induction motor is similar to the squirrel-cage induction motor, it is used in similar applications. However, the wound rotor induction motor is seen more often in applications where some speed or torque control is needed. As discussed earlier, we can manipulate the torque of ...
Form-Wound Coils Random
... The coil winding process begins with skeining (looping) of the magnet wire. Because of the difficulty to form wire of high width-to-thickness ratio, several wires in parallel may make one turn. Individual turns are arranged in precise location with respect to each other. That is, turn one is always ...
... The coil winding process begins with skeining (looping) of the magnet wire. Because of the difficulty to form wire of high width-to-thickness ratio, several wires in parallel may make one turn. Individual turns are arranged in precise location with respect to each other. That is, turn one is always ...
UNIT 16 ELECTRIC MOTORS
... when selecting a motor. However, it is used by manufacturers in determining the rated horsepower of a motor. If the load torque requirement exceeds the breakdown torque, the motor will stall. A motor is designed to operate at the full-load torque. A continuous-duty motor will operate indefinitely at ...
... when selecting a motor. However, it is used by manufacturers in determining the rated horsepower of a motor. If the load torque requirement exceeds the breakdown torque, the motor will stall. A motor is designed to operate at the full-load torque. A continuous-duty motor will operate indefinitely at ...
SINAMICS Drives
... automation and drive solutions that must be highly flexible and scalable. In all industrial sectors, there is a demand for individual solutions which are extremely ...
... automation and drive solutions that must be highly flexible and scalable. In all industrial sectors, there is a demand for individual solutions which are extremely ...
PMSM electrical parameters measurement
... The steps given below must be followed to determine the BEMF constant. 1. Spin the motor by an external driving motor or a hand drill machine at a constant speed. Higher speed is preferred, because the voltage measurement error is lower. 2. One-phase measurement: Measure the generated phase voltage ...
... The steps given below must be followed to determine the BEMF constant. 1. Spin the motor by an external driving motor or a hand drill machine at a constant speed. Higher speed is preferred, because the voltage measurement error is lower. 2. One-phase measurement: Measure the generated phase voltage ...
HV-Maxx Instructions.pm
... The ultimate high-voltage/high-power brushless is here & it is the HV-Maxx! The HV-Maxx brushless motor system is the best high-power reversible electronic speed control & sensor-based brushless motor upgrade that you can throw at your big trucks, hot boats, or any other high-power R/C application w ...
... The ultimate high-voltage/high-power brushless is here & it is the HV-Maxx! The HV-Maxx brushless motor system is the best high-power reversible electronic speed control & sensor-based brushless motor upgrade that you can throw at your big trucks, hot boats, or any other high-power R/C application w ...
Supplemental Protection (Fuses Protectors)
... Branch circuit overcurrent protective devices (OCPD) can be used everywhere OCPD are used, from protection of motors and motor circuits and group motor circuits, to protection of distribution and utilization equipment. Supplemental OCPD can only be used where proper protection is already being provi ...
... Branch circuit overcurrent protective devices (OCPD) can be used everywhere OCPD are used, from protection of motors and motor circuits and group motor circuits, to protection of distribution and utilization equipment. Supplemental OCPD can only be used where proper protection is already being provi ...
Assignment MSWord - Technical Learning College
... 9. Obviously, when velocity becomes a factor it must have____________, and as previously explained, the force related to the velocity must also have a direction, so that Pascal’s law alone does not apply to the dynamic factors of fluid power. A. Velocity head D. Dynamic factors of fluid power B. Gra ...
... 9. Obviously, when velocity becomes a factor it must have____________, and as previously explained, the force related to the velocity must also have a direction, so that Pascal’s law alone does not apply to the dynamic factors of fluid power. A. Velocity head D. Dynamic factors of fluid power B. Gra ...
Chapter 3. LOAD ELECTRICAL CHARACTERISTICS 3.1 Fixed
... provided by manufacturers. More often, data must be read from a single performance curve which relates pressure (head), flowrate, efficiency, and speed. Therefore, the nonlinear shape of motor/pump I-V curves must be approximated by a number of separate straight line segments. The endpoints of each ...
... provided by manufacturers. More often, data must be read from a single performance curve which relates pressure (head), flowrate, efficiency, and speed. Therefore, the nonlinear shape of motor/pump I-V curves must be approximated by a number of separate straight line segments. The endpoints of each ...
Phoenix, RoadRunner, and Sparrow Power System Owner`s Manual
... throttle setting. Phoenix and RoadRunner motors are brushless. Brushless hub motors are very efficient. Inside, there are three separate windings. Each winding is responsible for turning the wheel one-third of the way around. Sensors tell the controller which winding to apply power to. This allows t ...
... throttle setting. Phoenix and RoadRunner motors are brushless. Brushless hub motors are very efficient. Inside, there are three separate windings. Each winding is responsible for turning the wheel one-third of the way around. Sensors tell the controller which winding to apply power to. This allows t ...
Network effects of line start permanent magnet synchronous motors
... consumed in driving pumps with induction motors of the order of tens of kilowatts. Where variable-speed operation is not required, the LS-PMSM is a suitable replacement, and offers lower running costs for a rather higher initial cost. If LS-PMSMs are to be used to replace induction machines (IMs) on ...
... consumed in driving pumps with induction motors of the order of tens of kilowatts. Where variable-speed operation is not required, the LS-PMSM is a suitable replacement, and offers lower running costs for a rather higher initial cost. If LS-PMSMs are to be used to replace induction machines (IMs) on ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... producing component of the stator current. By coordinating the torque level for each operating speed, the power output is maintained constant in the flux weakening region. It existed to its direct scheme and indirect scheme flux linkage drive system. In order to produce the maximum torque, which mai ...
... producing component of the stator current. By coordinating the torque level for each operating speed, the power output is maintained constant in the flux weakening region. It existed to its direct scheme and indirect scheme flux linkage drive system. In order to produce the maximum torque, which mai ...
Brushless DC electric motor
Brushless DC electric motor (BLDC motors, BL motors) also known as electronically commutated motors (ECMs, EC motors) are synchronous motors that are powered by a DC electric source via an integrated inverter/switching power supply, which produces an AC electric signal to drive the motor. In this context, AC, alternating current, does not imply a sinusoidal waveform, but rather a bi-directional current with no restriction on waveform. Additional sensors and electronics control the inverter output amplitude and waveform (and therefore percent of DC bus usage/efficiency) and frequency (i.e. rotor speed).The rotor part of a brushless motor is often a permanent magnet synchronous motor, but can also be a switched reluctance motor, or induction motor.Brushless motors may be described as stepper motors; however, the term stepper motor tends to be used for motors that are designed specifically to be operated in a mode where they are frequently stopped with the rotor in a defined angular position. This page describes more general brushless motor principles, though there is overlap.Two key performance parameters of brushless DC motors are the motor constants Kv and Km.