one and two quadrant choppers
... DC/DC converters allow a DC/DC static conversion of the electrical power through which only the magnitude of the DC voltage is modified. For this reason these converters can be also named DC voltage regulators or DC voltage variators. Most of the DC/DC converters operate in switch-mode using the PWM ...
... DC/DC converters allow a DC/DC static conversion of the electrical power through which only the magnitude of the DC voltage is modified. For this reason these converters can be also named DC voltage regulators or DC voltage variators. Most of the DC/DC converters operate in switch-mode using the PWM ...
Using an Oscilloscope 5EM
... a) Obtain a thin horizontal line on the screen. Make it just bright enough to see clearly. b) Connect the low voltage supply unit to the input and adjust the controls to give one complete “cycle” of a sine curve on the screen. c) Using the “time cm-1” (or “time.div-1”) calibration, find the time for ...
... a) Obtain a thin horizontal line on the screen. Make it just bright enough to see clearly. b) Connect the low voltage supply unit to the input and adjust the controls to give one complete “cycle” of a sine curve on the screen. c) Using the “time cm-1” (or “time.div-1”) calibration, find the time for ...
experiment - UniMAP Portal
... The most interesting features of the three-phase synchronous motor are its ability to operate at exactly the same speed as the rotating magnetic field, the capability of running at unity power factor, and to be able to supply reactive power to an ac power source. As seen in previous lab, an asynchro ...
... The most interesting features of the three-phase synchronous motor are its ability to operate at exactly the same speed as the rotating magnetic field, the capability of running at unity power factor, and to be able to supply reactive power to an ac power source. As seen in previous lab, an asynchro ...
Decibel notes
... One common use of dB’s in electronics is to compare different levels of power (Watts). For example the power output to power input ratio of an amplifier (Power Gain). The relationship between dB and Watts is: dB = 10 Log10 Watts. To determine the power ‘Gain’ of an amplifier, the ratio of power out ...
... One common use of dB’s in electronics is to compare different levels of power (Watts). For example the power output to power input ratio of an amplifier (Power Gain). The relationship between dB and Watts is: dB = 10 Log10 Watts. To determine the power ‘Gain’ of an amplifier, the ratio of power out ...
N - ZARM
... The analog to digital converter unit is based on a 13bit ADC MCP3301 with SPI serial interface from Microchip. It has 100 ksps conversion rate at 5V. The reference voltage has been set by an adjustable voltage regulator IC TL317 according to position sensor measurement of 200 millimeters establishes ...
... The analog to digital converter unit is based on a 13bit ADC MCP3301 with SPI serial interface from Microchip. It has 100 ksps conversion rate at 5V. The reference voltage has been set by an adjustable voltage regulator IC TL317 according to position sensor measurement of 200 millimeters establishes ...
Week22_revised_Motor_Control_PWM
... Since the motor is at full voltage during the ON pulse, the motor runs at full torque during the ON pulse. A 25% duty cycle reduces the power applied to the motor close to 25%, yet the speed may not be reduced to 25% of the maximum speed. A PWM signal is at a fixed frequency. A very low PWM fr ...
... Since the motor is at full voltage during the ON pulse, the motor runs at full torque during the ON pulse. A 25% duty cycle reduces the power applied to the motor close to 25%, yet the speed may not be reduced to 25% of the maximum speed. A PWM signal is at a fixed frequency. A very low PWM fr ...
Article
... However, the extensive use of power electronics based equipment and non-linear loads at PCC generate harmonic currents, which may deteriorate the quality of power [3]-[5]. The widespread increase of non-linear loads nowadays, significant amounts of harmonic currents are being injected into power sys ...
... However, the extensive use of power electronics based equipment and non-linear loads at PCC generate harmonic currents, which may deteriorate the quality of power [3]-[5]. The widespread increase of non-linear loads nowadays, significant amounts of harmonic currents are being injected into power sys ...
Model: HPCW-640 D5-6
... number of hours per year, between stated maintenance intervals. The permissible average power output during a 24 hours period shall not exceed 80% of the prime power. 10% overload available for governing purposes only. Standby Power (ISO 3046 Fuel Stop power): Power available for use at variable loa ...
... number of hours per year, between stated maintenance intervals. The permissible average power output during a 24 hours period shall not exceed 80% of the prime power. 10% overload available for governing purposes only. Standby Power (ISO 3046 Fuel Stop power): Power available for use at variable loa ...
TECNEL Teaching Unit for the Study of Power Electronics (Converters:DC/AC+AC/DC+DC/DC+AC/AC)
... Motors: - EMT15. DC Permanent magnets motor. - EMT17. Three-phase motor of squirrel cage with “Y” connection. ...
... Motors: - EMT15. DC Permanent magnets motor. - EMT17. Three-phase motor of squirrel cage with “Y” connection. ...
pdf version - Efficient Power Conversion
... Class-D audio systems, satellites, automotive lighting, wireless power transmitters, AC-DC and DC-DC power supplies, to name just a few. The designers of the earliest applications were driven to GaN based on the faster speeds that could be achieved when switching power. Faster switching can translat ...
... Class-D audio systems, satellites, automotive lighting, wireless power transmitters, AC-DC and DC-DC power supplies, to name just a few. The designers of the earliest applications were driven to GaN based on the faster speeds that could be achieved when switching power. Faster switching can translat ...
Structures of the Energy flow system
... cobalt-ferrite composite would be strategically placed on the steering column. As a driver turned the wheel, the magnetization of the cobalt-ferrite ring would change in proportion to the amount of force applied by the driver. The change would be detected by a nearby field sensor that would interpre ...
... cobalt-ferrite composite would be strategically placed on the steering column. As a driver turned the wheel, the magnetization of the cobalt-ferrite ring would change in proportion to the amount of force applied by the driver. The change would be detected by a nearby field sensor that would interpre ...
PDF
... standard) (see 9.8, NEMA standards) Contactor hold-in (average of 60–70%b those in use) Solid-state control devices 90%c Noticeable light flicker 3% change (a)- Typical for NEMA design B motors only. Value may be higher (or lower) depending on actual motor and load characteristics. (b)-Value may be ...
... standard) (see 9.8, NEMA standards) Contactor hold-in (average of 60–70%b those in use) Solid-state control devices 90%c Noticeable light flicker 3% change (a)- Typical for NEMA design B motors only. Value may be higher (or lower) depending on actual motor and load characteristics. (b)-Value may be ...
Department of Electrical and Computer Engineering Power Systems Name:__________________________________
... d) In the power system shown in Fig. 4, two 30 kV generators are connected to a 400 kV transmission line through a 30/400 kV transformer. Impedances of the generators and the transformer are given in pu based on their own ratings. Find the fault level (short circuit ...
... d) In the power system shown in Fig. 4, two 30 kV generators are connected to a 400 kV transmission line through a 30/400 kV transformer. Impedances of the generators and the transformer are given in pu based on their own ratings. Find the fault level (short circuit ...
Test Procedure for NCP1031 POE Evaluation Board
... 1. Switch the electronic load on and set to zero load; switch all of the digital meters on (assuming they are wired properly for voltage and current sensing); turn the oscilloscope on with sensing in AC mode and 50 mV per division vertical and a sweep rate of 5 uS per division. Connect the scope pro ...
... 1. Switch the electronic load on and set to zero load; switch all of the digital meters on (assuming they are wired properly for voltage and current sensing); turn the oscilloscope on with sensing in AC mode and 50 mV per division vertical and a sweep rate of 5 uS per division. Connect the scope pro ...
Pre-lab4 Problems
... (e) Draw Bode plots (log-log; use the voltage gain instead of ‘dB’ for the y-axes for this time) for the open loop gain and the closed loop gains from 2b, 2c, 2d above on the same graph. What is the exponential rise-time for square waves in each case (see page 4.5)? Make a table of your results. ...
... (e) Draw Bode plots (log-log; use the voltage gain instead of ‘dB’ for the y-axes for this time) for the open loop gain and the closed loop gains from 2b, 2c, 2d above on the same graph. What is the exponential rise-time for square waves in each case (see page 4.5)? Make a table of your results. ...
5. Executive Summary The Automated Antenna Controller (AAC) is
... was chosen for its features and capabilities over other microcontroller offered by our customer, MFJ, Inc. The ADC is used to calculate the forward and reflected power from the representative voltages received from the directional coupler small signal output. After a full wave rectifier along with D ...
... was chosen for its features and capabilities over other microcontroller offered by our customer, MFJ, Inc. The ADC is used to calculate the forward and reflected power from the representative voltages received from the directional coupler small signal output. After a full wave rectifier along with D ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.