Reference speed
... This is enough to overcome average air drag and other losses at highway speeds. Another consideration is that the output voltage of the FC system is always low when compared with the common DC bus voltage. This calls for an intermediate DC-to-DC power converter which is capable of transferring the e ...
... This is enough to overcome average air drag and other losses at highway speeds. Another consideration is that the output voltage of the FC system is always low when compared with the common DC bus voltage. This calls for an intermediate DC-to-DC power converter which is capable of transferring the e ...
Full Text - ARPN Journals
... The ZPEC is done using MGL as the main operational element. The air flow energy (ZPE) when enters the MGL, a magnetic oscillatory field is created. When the pick-up motor is started by the pick-up motor battery, this oscillatory motion is transformed into rotational energy by MGL. The shaft coupling ...
... The ZPEC is done using MGL as the main operational element. The air flow energy (ZPE) when enters the MGL, a magnetic oscillatory field is created. When the pick-up motor is started by the pick-up motor battery, this oscillatory motion is transformed into rotational energy by MGL. The shaft coupling ...
High-precision Power Measurement of SiC Inverters
... Inverters generate PWM-modulated output that includes the switching frequency and its harmonic components. Consequently, power measurement must be performed over a wider band than when measuring DC or commercial frequency power. Let’s study the band that is needed in order to measure power at the sw ...
... Inverters generate PWM-modulated output that includes the switching frequency and its harmonic components. Consequently, power measurement must be performed over a wider band than when measuring DC or commercial frequency power. Let’s study the band that is needed in order to measure power at the sw ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... temperatures or in intense temperature variations. Also a high starting torque can be achieved without large inrush currents and the torque produced is independent of current direction. Therefore SRM is promising as an easy-to-manufacture, low priced, variable speed motor due to its very simple stru ...
... temperatures or in intense temperature variations. Also a high starting torque can be achieved without large inrush currents and the torque produced is independent of current direction. Therefore SRM is promising as an easy-to-manufacture, low priced, variable speed motor due to its very simple stru ...
Variable Speed Drives: Introducing Energy Saving
... A VSD works by converting the incoming electrical supply of fixed frequency into a variable frequency output. This variation in frequency allows the drive to control the way in which the motor operates — a low frequency for a slow speed, and a higher frequency for a faster speed. The output can also ...
... A VSD works by converting the incoming electrical supply of fixed frequency into a variable frequency output. This variation in frequency allows the drive to control the way in which the motor operates — a low frequency for a slow speed, and a higher frequency for a faster speed. The output can also ...
performance improvement of a photovoltaic generator powered dc
... There is a unique point on the PV voltage-current (I-V) and voltage-power (V-P) characteristic curves as shown in figures (2) and (3) respectively, called the maximum power point (MPP), at which the array produces maximum output power for each G. In general, when the load is direct-coupled, the oper ...
... There is a unique point on the PV voltage-current (I-V) and voltage-power (V-P) characteristic curves as shown in figures (2) and (3) respectively, called the maximum power point (MPP), at which the array produces maximum output power for each G. In general, when the load is direct-coupled, the oper ...
PC Based Wireless Control Of Toy Car
... direction. 3. The Driver- This portion is required to bring about a proper interfacing between the microcontroller and the dc motors. It steps up the output signal from the microcontroller to a fairly large level for driving the motors. Control signals from the microcontroller energise or de-energis ...
... direction. 3. The Driver- This portion is required to bring about a proper interfacing between the microcontroller and the dc motors. It steps up the output signal from the microcontroller to a fairly large level for driving the motors. Control signals from the microcontroller energise or de-energis ...
Document
... as well as reliability of the electric drive including its power electronics, electric motor etc. • The current generation Hi Voltage PWM (pulse width modulated) drives operating at high altitude have higher levels of electrical and mechanical stress compared with those encountered in the past. • Ai ...
... as well as reliability of the electric drive including its power electronics, electric motor etc. • The current generation Hi Voltage PWM (pulse width modulated) drives operating at high altitude have higher levels of electrical and mechanical stress compared with those encountered in the past. • Ai ...
Servo Motor Kontrolü Servo Motors
... the next stage which is mainly the packaging stage. So in order to achieve this conveyor belts are used with servo motors so that the bottle moves precisely to the desired location and stops so that the liquid can be poured into it and then it is guided to the next stage. This process continues unti ...
... the next stage which is mainly the packaging stage. So in order to achieve this conveyor belts are used with servo motors so that the bottle moves precisely to the desired location and stops so that the liquid can be poured into it and then it is guided to the next stage. This process continues unti ...
datasheet XtraDrive
... With the internal set speed selected: switches the internal speed settings. Alarm reset: releases the servo alarm state. Control power supply input for sequence signals: users must provide the +24 V power supply. Allowable voltage fluctuation range: 11 to 25 V Initial data request signal when using ...
... With the internal set speed selected: switches the internal speed settings. Alarm reset: releases the servo alarm state. Control power supply input for sequence signals: users must provide the +24 V power supply. Allowable voltage fluctuation range: 11 to 25 V Initial data request signal when using ...
Course 1 Laboratory
... Assuming that you have done everything correctly you should see a reading of about 2 m V on the meter with the standard resistor in circuit; that is, with the switch (figure 5) in position “a”; what is the current in the solenoid? Now switch the meter from the standard resistor to the search coil. O ...
... Assuming that you have done everything correctly you should see a reading of about 2 m V on the meter with the standard resistor in circuit; that is, with the switch (figure 5) in position “a”; what is the current in the solenoid? Now switch the meter from the standard resistor to the search coil. O ...
Power Factor improved by Variable Speed AC Drives
... The use of Variable speed AC Drives (VSD) to control motor speed has the advantage of clearly improving the power factor and thus reducing losses in the supply cables and transformers. It also avoids the cost of investment in power-factor-correction equipment. This article explains the reason for th ...
... The use of Variable speed AC Drives (VSD) to control motor speed has the advantage of clearly improving the power factor and thus reducing losses in the supply cables and transformers. It also avoids the cost of investment in power-factor-correction equipment. This article explains the reason for th ...
Traction Permanent Magnet Synchronous Motor Torque Control with
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
AVR449: Sinusoidal driving of 3-phase
... rotor and load creates a mechanical low pass filter. Choosing the PWM switching frequency sufficiently high, there will be no noticeable jitter in the rotor speed. Secondly, the currents fed through the windings of even a small motor can be in the range of several amperes. Forcing this current throu ...
... rotor and load creates a mechanical low pass filter. Choosing the PWM switching frequency sufficiently high, there will be no noticeable jitter in the rotor speed. Secondly, the currents fed through the windings of even a small motor can be in the range of several amperes. Forcing this current throu ...
2. Flux Weakening of PMSM
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
Investigation of DC Motors for Electric and Hybrid Electric Motor
... IVT was also conducted. These tests revealed that field weakening appears to be a viable low-cost speed-control method. Testing of these motors, coupled with an IVT revealed that the output of a differential or planetary gear set can be controlled by varying the speed of the inputs. Combining this i ...
... IVT was also conducted. These tests revealed that field weakening appears to be a viable low-cost speed-control method. Testing of these motors, coupled with an IVT revealed that the output of a differential or planetary gear set can be controlled by varying the speed of the inputs. Combining this i ...
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 ...
24-DC Generators Part 2
... • Smaller resistances increase the rate of build-up • If the resistance is too large (greater than the “critical resistance”) then voltage build-up does not occur • See Figure 5.24 for an example ...
... • Smaller resistances increase the rate of build-up • If the resistance is too large (greater than the “critical resistance”) then voltage build-up does not occur • See Figure 5.24 for an example ...
Analysis and Calculation of Three-dimensional Temperature Field of
... converter switching device, the input voltage of traction motor cannot be further boosted. Moreover, the experience indicates that when the electrical insulation system is strengthened by one level, the output power of motor will correspondingly increase by 10% to 15%. So it’s advisable to boost the ...
... converter switching device, the input voltage of traction motor cannot be further boosted. Moreover, the experience indicates that when the electrical insulation system is strengthened by one level, the output power of motor will correspondingly increase by 10% to 15%. So it’s advisable to boost the ...
Manuals Basic Electrical Engineering BE-104
... pole core. When direct current is passed through the field winding, it magnetizes the poles which produce the require flux. The field coils of all the poles are connected in series in such a way that when current flows through them, the adjacent poles attain opposite polarity. ...
... pole core. When direct current is passed through the field winding, it magnetizes the poles which produce the require flux. The field coils of all the poles are connected in series in such a way that when current flows through them, the adjacent poles attain opposite polarity. ...
Brushed DC electric motor
A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electric power to driving mechanical energy,and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field. Depending on the connections of the field to the power supply, the speed and torque characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills. Since the brushes wear down and require replacement, brushless DC motors using power electronic devices have displaced brushed motors from many applications