IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... winding. Such a feature greatly reduces the number of power switches in the converter and thereby makes the drive economical. The torque constant is given by the slope of the inductance vs. rotor position characteristic. It is understood that the inductance of a stator winding is a function of both ...
... winding. Such a feature greatly reduces the number of power switches in the converter and thereby makes the drive economical. The torque constant is given by the slope of the inductance vs. rotor position characteristic. It is understood that the inductance of a stator winding is a function of both ...
AVR449: Sinusoidal driving of 3-phase
... In most of the literature, permanent magnet motors are divided into two categories based on the shape of the back-EMF (voltage induced in the coils when the motor is spinning). The back-EMF can either be trapezoidal or sinusoidal in shape. Although the terminology is not consistent throughout the li ...
... In most of the literature, permanent magnet motors are divided into two categories based on the shape of the back-EMF (voltage induced in the coils when the motor is spinning). The back-EMF can either be trapezoidal or sinusoidal in shape. Although the terminology is not consistent throughout the li ...
the guideline to electric propulsion
... Air cooled drive solution is a very good an uncomplicated solution that easily can be used if the losses are low, as in the STADT STASCHO No-Loss drives. * TRANSFORMERS NEEDED ? Yes or No. Most of the drives used in electric propulsion systems on ships require big transformers in their systems. Ther ...
... Air cooled drive solution is a very good an uncomplicated solution that easily can be used if the losses are low, as in the STADT STASCHO No-Loss drives. * TRANSFORMERS NEEDED ? Yes or No. Most of the drives used in electric propulsion systems on ships require big transformers in their systems. Ther ...
Key Words:
... statistical distribution is shown in Table 1, which also shows the maximum Qm measured as well as the average Qm. For example, for a 13.8-kV stator, the average Qm from all tests was 312 mV. Twenty-five percent of tests had a Qm <38 mV, 50% (the median) of the tests had a Qm <96 mV, 75% were <194 mV ...
... statistical distribution is shown in Table 1, which also shows the maximum Qm measured as well as the average Qm. For example, for a 13.8-kV stator, the average Qm from all tests was 312 mV. Twenty-five percent of tests had a Qm <38 mV, 50% (the median) of the tests had a Qm <96 mV, 75% were <194 mV ...
Direct Torque Control of 5-Phase 10/8 Switched
... An excellent study of DTC method applied to 3phase 6/4 SRM with closest concept to the conventional DTC of ac machines was fulfilled in [11]. Authors introduced comparable theory with conventional DTC of ac machines by using motor flux and torque defining equations that will be mentioned summarily i ...
... An excellent study of DTC method applied to 3phase 6/4 SRM with closest concept to the conventional DTC of ac machines was fulfilled in [11]. Authors introduced comparable theory with conventional DTC of ac machines by using motor flux and torque defining equations that will be mentioned summarily i ...
Discrete-time AC motor control apparatus
... the current controller and hence the origin angular p The motor winding currents in and i1, respectively position can be sensed by the origin sense switch 22. attained from the current sensors 15 and 16 are sent via The origin sense signal is fed from the origin sense the low-pass ?lter 17, which re ...
... the current controller and hence the origin angular p The motor winding currents in and i1, respectively position can be sensed by the origin sense switch 22. attained from the current sensors 15 and 16 are sent via The origin sense signal is fed from the origin sense the low-pass ?lter 17, which re ...
Field Oriented Stepper Motor Control
... Despite recent performance improvements in step motor modeling and control algorithms, open-loop control still falls significantly short of achieving maximum motor performance. Step motors, which are often used in industrial applications, can exhibit stepping resonance and skipped steps. Field orien ...
... Despite recent performance improvements in step motor modeling and control algorithms, open-loop control still falls significantly short of achieving maximum motor performance. Step motors, which are often used in industrial applications, can exhibit stepping resonance and skipped steps. Field orien ...
Analysis and Calculation of Three-dimensional Temperature Field of
... in the motor, which results in high temperature rise of each mechanical part (sometimes even reach up to 200 ℃ and above). In addition, in order to make full use of magnetic materials, the motor often designed at heavy electromagnetic load. So the loss of the motor increases dramatically and it lead ...
... in the motor, which results in high temperature rise of each mechanical part (sometimes even reach up to 200 ℃ and above). In addition, in order to make full use of magnetic materials, the motor often designed at heavy electromagnetic load. So the loss of the motor increases dramatically and it lead ...
variable frequency 101
... available to vary motor speed, however, frequency changes were limited because generator speed reduction lowered the output frequency but not the voltage. We will see why this is important a little later. In our industry, variable speed pumping applications were far more complex in the past than the ...
... available to vary motor speed, however, frequency changes were limited because generator speed reduction lowered the output frequency but not the voltage. We will see why this is important a little later. In our industry, variable speed pumping applications were far more complex in the past than the ...
AVR442: PC fan control using tiny13
... This application note describes the operation of 12 volt DC cooling fans typically used to supply cooling air to electronic equipment: These fans are typically based on two-phase Brushless DC (BLDC) motors drawing between 1 and 50 watts of power. Single-phase brushless DC motors are also used in fan ...
... This application note describes the operation of 12 volt DC cooling fans typically used to supply cooling air to electronic equipment: These fans are typically based on two-phase Brushless DC (BLDC) motors drawing between 1 and 50 watts of power. Single-phase brushless DC motors are also used in fan ...
Some Sustainability Aspects of Energy Conversion in Urban Electric
... three-phase induction motors and variable voltage variable frequency (VVVF) inverters [17]. Since electric drive systems are used with static converters and traction induction motors, with appropriate controls these machines can realize both traction and electric braking regimes of electric traction ...
... three-phase induction motors and variable voltage variable frequency (VVVF) inverters [17]. Since electric drive systems are used with static converters and traction induction motors, with appropriate controls these machines can realize both traction and electric braking regimes of electric traction ...
Motor torque, load torque and selection of motors
... designs with more reserve capacity and better speed– torque characteristics to suit the requirements of a particular sector. These are particularly for installations where the distribution system may have wider voltage fluctuations or the load itself may have varying load demands. It is possible tha ...
... designs with more reserve capacity and better speed– torque characteristics to suit the requirements of a particular sector. These are particularly for installations where the distribution system may have wider voltage fluctuations or the load itself may have varying load demands. It is possible tha ...
chap02_dc machines_260107
... In the case of a generator, m is the input mechanical torque, which is converted to electrical power. For the motor, e is developed electromagnetic torque, which used to drive the mechanical load. Chap 2: DC Machines ...
... In the case of a generator, m is the input mechanical torque, which is converted to electrical power. For the motor, e is developed electromagnetic torque, which used to drive the mechanical load. Chap 2: DC Machines ...
ALTISTART ® 46 Soft Start
... Note: The following is a sample specification for selecting an enclosed soft start controller. It is intended to assist you in acquiring the best product for your application. This material is not copyrighted, and you may use it in whatever fashion best suits your particular needs. ...
... Note: The following is a sample specification for selecting an enclosed soft start controller. It is intended to assist you in acquiring the best product for your application. This material is not copyrighted, and you may use it in whatever fashion best suits your particular needs. ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
... The Switched reluctance machine (SRM) can be operated as a motor/generator which is the subject of interest by many researchers in the field of electrical machines for the last few decades. Many research papers have concluded that Switched Reluctance motor (SRM) has proved to be a valid alternative ...
... The Switched reluctance machine (SRM) can be operated as a motor/generator which is the subject of interest by many researchers in the field of electrical machines for the last few decades. Many research papers have concluded that Switched Reluctance motor (SRM) has proved to be a valid alternative ...
Saftronics DF8+ Series DC Drive Instruction Manual
... CAUTION: Adjusting RV6 to over 50% clockwise rotation, may cause drive instability which cannot be corrected by RV7 voltage stability. In such a case, back off slightly from the position where RV6 causes instability. This may result in a slight decrease in speed holding. ...
... CAUTION: Adjusting RV6 to over 50% clockwise rotation, may cause drive instability which cannot be corrected by RV7 voltage stability. In such a case, back off slightly from the position where RV6 causes instability. This may result in a slight decrease in speed holding. ...
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.