EE 340 – Fall 2007 Homework-1 (80 points) Solve following
... A remarkable method to balance a circuit: A resistive load with R = 0.242 Ω is connected between phases a-b of a 440V, 3-phase, positive sequence supply. Let Vab = 440 ∟0o V, Vbc = 440 ∟-120o V, Vca = 440 ∟+120o V Calculate the load currents and line currents. Repeat these calculations when a capaci ...
... A remarkable method to balance a circuit: A resistive load with R = 0.242 Ω is connected between phases a-b of a 440V, 3-phase, positive sequence supply. Let Vab = 440 ∟0o V, Vbc = 440 ∟-120o V, Vca = 440 ∟+120o V Calculate the load currents and line currents. Repeat these calculations when a capaci ...
Lecture Notes EEE 360
... • The direct current (dc) machine can be used as a motor or as a generator. • DC Machine is most often used for a motor. • The major advantages of dc machines are the easy speed and torque regulation. • However, their application is limited to mills, mines and trains. As examples, trolleys and under ...
... • The direct current (dc) machine can be used as a motor or as a generator. • DC Machine is most often used for a motor. • The major advantages of dc machines are the easy speed and torque regulation. • However, their application is limited to mills, mines and trains. As examples, trolleys and under ...
Part 2
... Power Hub • Purpose: – Regulate input voltage into the circuit – Allows for flexible power supplies that can be used for your robot (input 7V – 36V; output 5V) – Most ICs and electronic components use 5V ...
... Power Hub • Purpose: – Regulate input voltage into the circuit – Allows for flexible power supplies that can be used for your robot (input 7V – 36V; output 5V) – Most ICs and electronic components use 5V ...
Voltage Transducer LV 25
... For the electronic measurement of voltages : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high voltage) and the secondary circuit (electronic circuit). ...
... For the electronic measurement of voltages : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high voltage) and the secondary circuit (electronic circuit). ...
Submerge Scooters Background and History Motor types Lithium
... Lithium iron Phosphate cells offer the best cycle life but are almost double the size and weight of other types of lithium batteries, making them unsuited to reducing scooter size and weight. Ultimately Iron Phosphates are only marginally better than Nickel Metal Hydride batteries in reducing scoot ...
... Lithium iron Phosphate cells offer the best cycle life but are almost double the size and weight of other types of lithium batteries, making them unsuited to reducing scooter size and weight. Ultimately Iron Phosphates are only marginally better than Nickel Metal Hydride batteries in reducing scoot ...
Brushed DC Motor Fundamentals
... The frequency of the PWM waveform is an important consideration. Too low a frequency will result in a noisy motor at low speeds and sluggish response to changes in duty cycle. Too high a frequency lessens the efficiency of the system due to switching losses in the switching devices. A good rule of t ...
... The frequency of the PWM waveform is an important consideration. Too low a frequency will result in a noisy motor at low speeds and sluggish response to changes in duty cycle. Too high a frequency lessens the efficiency of the system due to switching losses in the switching devices. A good rule of t ...
S13 Review (s14review13)
... parameters are unsaturated values. Unless otherwise noted, I will use per unit values in this class. Only the saturation needs to be accounted for to complete the model The test to determine these parameters consists of synchronizing a generator to the system and adjusting the generator to produce n ...
... parameters are unsaturated values. Unless otherwise noted, I will use per unit values in this class. Only the saturation needs to be accounted for to complete the model The test to determine these parameters consists of synchronizing a generator to the system and adjusting the generator to produce n ...
Introduction to BLDC Motor Control - Renesas e
... DC Motor Bridge The DC motor needs four transistors to operate the DC motor The combination of transistor is called an H-Bridge, due to the obvious shape Transistors are switched diagonally to allow DC current to flow in the motor in either direction The transistors can be Pulse Width Modul ...
... DC Motor Bridge The DC motor needs four transistors to operate the DC motor The combination of transistor is called an H-Bridge, due to the obvious shape Transistors are switched diagonally to allow DC current to flow in the motor in either direction The transistors can be Pulse Width Modul ...
File
... • I need to track a 12VDC battery voltage on an analog pin on a microcontroller. I am trying to see what the current level the battery is. The microcontroller has a maximum rated input of 5VDC. How can I go from 48VDC to 5VDC so I don’t blow up the microcontroller? – Voltage Divider: a simple way to ...
... • I need to track a 12VDC battery voltage on an analog pin on a microcontroller. I am trying to see what the current level the battery is. The microcontroller has a maximum rated input of 5VDC. How can I go from 48VDC to 5VDC so I don’t blow up the microcontroller? – Voltage Divider: a simple way to ...
A Prototype Of Solar Powered Car
... • 4 Batteries each of 4V & 1.5A, connected in series. • 2 Solar Panel each of 8.86V & 0.35A are connected in series. • Speed is approximate 1km/hr . • 2 Motor each of 60rpm and 12V. • 2 DPDT swtich • 4 relay each of 12V • Charging time max 4-5hrs depending on light and heat intensity of weather. • D ...
... • 4 Batteries each of 4V & 1.5A, connected in series. • 2 Solar Panel each of 8.86V & 0.35A are connected in series. • Speed is approximate 1km/hr . • 2 Motor each of 60rpm and 12V. • 2 DPDT swtich • 4 relay each of 12V • Charging time max 4-5hrs depending on light and heat intensity of weather. • D ...
Electric Fan Motor Characteristics and Benefits
... permanent magnets and coiled wire, as in a standard DC motor, simply with the rotor and stator reversed. The use of a permanent magnet in the EC motor requires commutation, like in the traditional brushed DC motor. Instead of the brushed commutators of the tradition DC motor, an EC motor uses Hall E ...
... permanent magnets and coiled wire, as in a standard DC motor, simply with the rotor and stator reversed. The use of a permanent magnet in the EC motor requires commutation, like in the traditional brushed DC motor. Instead of the brushed commutators of the tradition DC motor, an EC motor uses Hall E ...
Variable Speed Zebra
... The SETTING STEP switch operates in the same way, but it’s choices are: OFF - h1 - h2 - c1 - c2 - FA - H1 - H2 - C1 - C2 - OFF. Selecting the capital letter for H or C will simultaneously make the FAN line active. Alternately, stopping on a choice that has a small h or c will send signals only down ...
... The SETTING STEP switch operates in the same way, but it’s choices are: OFF - h1 - h2 - c1 - c2 - FA - H1 - H2 - C1 - C2 - OFF. Selecting the capital letter for H or C will simultaneously make the FAN line active. Alternately, stopping on a choice that has a small h or c will send signals only down ...
Wireless Speed and Direction Control of Dc Motor by Using
... applied in various new industrial application that required higher performance, reliable ,easy control as well as economical purpose. In most of the application sinusoidal Pulse Width Modulation have been used. For direction control of dc motor we can simply change the input terminal of dc motor the ...
... applied in various new industrial application that required higher performance, reliable ,easy control as well as economical purpose. In most of the application sinusoidal Pulse Width Modulation have been used. For direction control of dc motor we can simply change the input terminal of dc motor the ...
Motor Interfacing with the Handy Board
... stepper, in order for current to flow in opposite directions in each phase (i.e., independent stator winding), the polarity of the voltage applied to the winding must reverse (hence the name, bipolar). In a unipolar stepper, each phase has a center tap, so if current is supplied at the center tap, i ...
... stepper, in order for current to flow in opposite directions in each phase (i.e., independent stator winding), the polarity of the voltage applied to the winding must reverse (hence the name, bipolar). In a unipolar stepper, each phase has a center tap, so if current is supplied at the center tap, i ...
P1000 Mechanical Specification Submittal
... Bipolar Transistors), with a carrier frequency range of 1 kHz to 15 kHz, permits quiet motor operation. This drive has one control logic board and keypad for all horsepower ratings. Printed circuit boards employ surface mount technology, providing both high reliability, and small physical size of th ...
... Bipolar Transistors), with a carrier frequency range of 1 kHz to 15 kHz, permits quiet motor operation. This drive has one control logic board and keypad for all horsepower ratings. Printed circuit boards employ surface mount technology, providing both high reliability, and small physical size of th ...
Motor Trouble-Shooting Chart
... out freely. Make sure that the switch is not loose on the shaft. Inspect contacts and connections on the stationary switch. Replace switch if the contacts are burned or pitted. ...
... out freely. Make sure that the switch is not loose on the shaft. Inspect contacts and connections on the stationary switch. Replace switch if the contacts are burned or pitted. ...
AN885
... motor control used (phase angle or chopper). For example, a vacuum cleaner operating in phase angle mode at reduced speed (i.e. conduction phase angle at around 90°), produces a very high level of even harmonics (Figure 5.). The harmonics do not represent real or active power, but nevertheless they ...
... motor control used (phase angle or chopper). For example, a vacuum cleaner operating in phase angle mode at reduced speed (i.e. conduction phase angle at around 90°), produces a very high level of even harmonics (Figure 5.). The harmonics do not represent real or active power, but nevertheless they ...
Professional Affiliations
... sizing and delegate tasks to various project teams. Successfully rectified anti fuse FPGA issues. Implemented low cost ProASIC chip. Specify test plans and procedures to qualify passive, active and EMI filters used in power electronic applications. Developed a/c dynamometer based torque validation t ...
... sizing and delegate tasks to various project teams. Successfully rectified anti fuse FPGA issues. Implemented low cost ProASIC chip. Specify test plans and procedures to qualify passive, active and EMI filters used in power electronic applications. Developed a/c dynamometer based torque validation t ...
Electric Efficient Motor
... In applications that require flow or pressure, particularly in systems with high friction loss, the most ‘energy effective’ technique is often variable speed control. This is because the consumed power is proportional with n3, n being the number of revolutions. ...
... In applications that require flow or pressure, particularly in systems with high friction loss, the most ‘energy effective’ technique is often variable speed control. This is because the consumed power is proportional with n3, n being the number of revolutions. ...
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