![Sensorless Control of Doubly-Fed Induction Generators in Variable](http://s1.studyres.com/store/data/003772839_1-81c778d828a225339bc3ff8d3f32e691-300x300.png)
Type Rated operational Rated operational Control voltage voltage
... by-passing of the semiconductors during running operation. Therefore the semiconductors can only be damaged by short-circuit currents during ramp-up and ramp-down function. ...
... by-passing of the semiconductors during running operation. Therefore the semiconductors can only be damaged by short-circuit currents during ramp-up and ramp-down function. ...
Torque‐Speed Measurements
... values should be reduced to the lowest setting that still meets the system performance requirements. The maximum speed will also be reduced with a lower voltage. 12V batteries have an output range of approximately 10.5 VDC – 13.1 VDC. When determining what parameters to use, make sure to test wit ...
... values should be reduced to the lowest setting that still meets the system performance requirements. The maximum speed will also be reduced with a lower voltage. 12V batteries have an output range of approximately 10.5 VDC – 13.1 VDC. When determining what parameters to use, make sure to test wit ...
Dynamo
... the magnetic field. These were referred to as “magnetoThe technology of rotary converters was replaced in the electric machines” or magnetos.[15] However, researchers early 20th century by mercury-vapor rectifiers, which found that stronger magnetic fields, and so more power, were smaller, did not prod ...
... the magnetic field. These were referred to as “magnetoThe technology of rotary converters was replaced in the electric machines” or magnetos.[15] However, researchers early 20th century by mercury-vapor rectifiers, which found that stronger magnetic fields, and so more power, were smaller, did not prod ...
The Use of Variable Frequency Drives Engineering Bulletin
... VFD’s must be provided with inverter-duty motors in order to maintain the motor warranty. Motors utilized in VFD applications are not covered under warranty by either the motor manufacturer or EVAPCO unless inverter-duty motors are supplied. The power supplied to the motor by a VFD is not smooth. Th ...
... VFD’s must be provided with inverter-duty motors in order to maintain the motor warranty. Motors utilized in VFD applications are not covered under warranty by either the motor manufacturer or EVAPCO unless inverter-duty motors are supplied. The power supplied to the motor by a VFD is not smooth. Th ...
Simple Way to Achieve Changeable Holding Current of DRV8x
... This example is a total solution of a stepper motor with changeable holding current function using the DRV8818. When the stepper is in normal operation, the VREF of DRV8818 is about 2 V, when the stepper enters into the holding state, the VREF automatically drops down to 1 V. Figure 5 and Figure 6 s ...
... This example is a total solution of a stepper motor with changeable holding current function using the DRV8818. When the stepper is in normal operation, the VREF of DRV8818 is about 2 V, when the stepper enters into the holding state, the VREF automatically drops down to 1 V. Figure 5 and Figure 6 s ...
VI Lubuska Konferencja Naukowo-Techniczna - i
... and rotor speed of rotation. As ψn=1=0, χn=1=ω, the stator and rotor transient currents are a sum of three components: a steady state current and two damping harmonic components with different frequencies. In case of an unmovable IM there were also two damping (free) components, but they were not ha ...
... and rotor speed of rotation. As ψn=1=0, χn=1=ω, the stator and rotor transient currents are a sum of three components: a steady state current and two damping harmonic components with different frequencies. In case of an unmovable IM there were also two damping (free) components, but they were not ha ...
Ieee paper
... the existing drive systems to improve their efficiency. A major issue of using conventional IM drives in systems with constant battery source like electric vehicles is that, during high speeds motor voltage drops down thus affecting the performance of the vehicle. Power electronic boost converters c ...
... the existing drive systems to improve their efficiency. A major issue of using conventional IM drives in systems with constant battery source like electric vehicles is that, during high speeds motor voltage drops down thus affecting the performance of the vehicle. Power electronic boost converters c ...
G210 STEP MOTOR DRIVE
... The power supply voltage must be between 24 VDC and 80 VDC. The maximum power supply current required is 67% of the motor’s rated phase current. An unregulated power supply may be used as long as the voltage stays between the limits; keep the ripple voltage to 10% or less for best results. The drive ...
... The power supply voltage must be between 24 VDC and 80 VDC. The maximum power supply current required is 67% of the motor’s rated phase current. An unregulated power supply may be used as long as the voltage stays between the limits; keep the ripple voltage to 10% or less for best results. The drive ...
Cast Coil Transformers
... The transformer core is manufactured with grain-oriented magnetic steel, with high magnetic permeability, low losses, and insulated on both sides by a thin layer of organic material (carlyte). The cutting and assembly is performed at 45° angles using the step lap method to reduce losses, excitation ...
... The transformer core is manufactured with grain-oriented magnetic steel, with high magnetic permeability, low losses, and insulated on both sides by a thin layer of organic material (carlyte). The cutting and assembly is performed at 45° angles using the step lap method to reduce losses, excitation ...
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 ...
IRMCF3xx Series Controller Dynamics and Tuning
... employed for current regulation. The q-channel (torque) control structure is identical to d-channel (flux). The current control dynamics of d-channel is depicted in Figure 1. The motor can be represented by a first order lag with time constant T = L/R. This time constant involves motor inductance an ...
... employed for current regulation. The q-channel (torque) control structure is identical to d-channel (flux). The current control dynamics of d-channel is depicted in Figure 1. The motor can be represented by a first order lag with time constant T = L/R. This time constant involves motor inductance an ...
PMSM electrical parameters measurement
... 3.2.2 Method to determine high number of the pole pair It is possible to use two methods for determination high number of pole pairs. Selection of the method depends on available measuring equipment. An oscilloscope is required for measurement in both the methods • Method A: a current probe and an i ...
... 3.2.2 Method to determine high number of the pole pair It is possible to use two methods for determination high number of pole pairs. Selection of the method depends on available measuring equipment. An oscilloscope is required for measurement in both the methods • Method A: a current probe and an i ...
Computer Numerical Control for my RF- 30 Mill/Drill
... Thanks to Graham Bowes in pointing out design and documentation errors related to grounding which have now been corrected. Thanks to "Druid Noibn" for seeing that my AC outlets were not grounded correctly. They are now. Thanks to Dan Mauch for explaining to me that the 36v stepper motor power should ...
... Thanks to Graham Bowes in pointing out design and documentation errors related to grounding which have now been corrected. Thanks to "Druid Noibn" for seeing that my AC outlets were not grounded correctly. They are now. Thanks to Dan Mauch for explaining to me that the 36v stepper motor power should ...
Starting High Inertia Loads - Rockwell Automation Knowledgebase
... An advantage of solid-state starters when compared to standard electromechanical starters (i.e., Wye-Delta and Autotransformer starters) is that many solid-state devices offer phase loss and stall protection as well as energy saving features. When a single phase of three-phase line power is lost, th ...
... An advantage of solid-state starters when compared to standard electromechanical starters (i.e., Wye-Delta and Autotransformer starters) is that many solid-state devices offer phase loss and stall protection as well as energy saving features. When a single phase of three-phase line power is lost, th ...
Chapter 9 – DC Motors and Generators
... Poles are made of permanent magnets instead of field coils. Advantages: - No copper losses of field circuit - Smaller motor due to elimination of field winding Common in smaller fractional and subfractional-horsepower sizes. Disadvantages: - Permanent-magnet cannot produce as high a flux density as ...
... Poles are made of permanent magnets instead of field coils. Advantages: - No copper losses of field circuit - Smaller motor due to elimination of field winding Common in smaller fractional and subfractional-horsepower sizes. Disadvantages: - Permanent-magnet cannot produce as high a flux density as ...
Electric motor
![](https://commons.wikimedia.org/wiki/Special:FilePath/Motors01CJC.jpg?width=300)
An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators. Small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use. The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.Electric motors are used to produce linear or rotary force (torque), and should be distinguished from devices such as magnetic solenoids and loudspeakers that convert electricity into motion but do not generate usable mechanical powers, which are respectively referred to as actuators and transducers.