Speed Control of PMBLDC Motor Using PFC Cuk Converter
... mains is designed to drive a permanent magnet brushless DC motor (PMBLDCM). The cuk converter power switch is driven with the aid of single stage power factor correction (PFC) converter control. The closed loop operation of sliding mode controller (SMC) is designed within the power factor correction ...
... mains is designed to drive a permanent magnet brushless DC motor (PMBLDCM). The cuk converter power switch is driven with the aid of single stage power factor correction (PFC) converter control. The closed loop operation of sliding mode controller (SMC) is designed within the power factor correction ...
A. Power from wind turbine
... by harmonic mitigation. The three-phase boost type PWM rectifier has the capability of to work as an ideal PFC, with very low THD at any operation point. Hence, it is investigated in this work. The converter topology has six two-quadrant controlled switches each one implemented by an IGBT associated ...
... by harmonic mitigation. The three-phase boost type PWM rectifier has the capability of to work as an ideal PFC, with very low THD at any operation point. Hence, it is investigated in this work. The converter topology has six two-quadrant controlled switches each one implemented by an IGBT associated ...
Electrolytic Capacitor-Based Data Backup Power Solution for a 12V
... maintaining 12V to the load. When Q1 is in the off state, the body diode of this transistor effectively isolates the load from the input lines. The PFO flag identifies the fault and signals the host computer to disconnect the noncritical loads and supply circuitry. Here it is assumed that the critic ...
... maintaining 12V to the load. When Q1 is in the off state, the body diode of this transistor effectively isolates the load from the input lines. The PFO flag identifies the fault and signals the host computer to disconnect the noncritical loads and supply circuitry. Here it is assumed that the critic ...
MDS-065APS24 B Datasheet
... required for the output to reach 95% of its set value, after the input voltage is removed. ■ Graph illustrating the Start-up Time, Rise Time, and Hold-up Time ...
... required for the output to reach 95% of its set value, after the input voltage is removed. ■ Graph illustrating the Start-up Time, Rise Time, and Hold-up Time ...
Exams98
... b) Re-sketch the circuit of “a” showing how you would convert the circuit to operate as a half wave controlled three phase rectifier. ...
... b) Re-sketch the circuit of “a” showing how you would convert the circuit to operate as a half wave controlled three phase rectifier. ...
Looking for
... Self-contained SMPS solutions and rich peripherals of dsPIC® Digital Power devices enable the engineer to design solutions that do not require much in the way of external support chips. So when using the dsPIC DSC SMPS solution, developers can obtain a 20% reduction in component count over other sol ...
... Self-contained SMPS solutions and rich peripherals of dsPIC® Digital Power devices enable the engineer to design solutions that do not require much in the way of external support chips. So when using the dsPIC DSC SMPS solution, developers can obtain a 20% reduction in component count over other sol ...
Digital Oscilloscope
... the Y deflection of the spot varies continuously as it is swept continuously in the Xdirection at a constant rate fixed by the timebase. However, in the case of a digital scope the voltage is only measured at discrete time intervals. For this scope the record length (i.e. the number of data points) ...
... the Y deflection of the spot varies continuously as it is swept continuously in the Xdirection at a constant rate fixed by the timebase. However, in the case of a digital scope the voltage is only measured at discrete time intervals. For this scope the record length (i.e. the number of data points) ...
lecture1429901112
... The RF input to be analyzed is applied to the input attenuator. After attenuating, the signal is fed to low pass filter. The low pass filter suppresses high frequency components and allows low frequency components to pass through it. The output of the low pass filter is given to the mixer, where th ...
... The RF input to be analyzed is applied to the input attenuator. After attenuating, the signal is fed to low pass filter. The low pass filter suppresses high frequency components and allows low frequency components to pass through it. The output of the low pass filter is given to the mixer, where th ...
Optimal Switching in a Three-Level Inverter: an
... extensively in the literature and are usually based on off-line algorithms and the use of lookup tables. The well known Selective Harmonic Elimination (SHE) method [11] reduces the THD by removing low-order harmonics. The SHE method requires the solution of a set of nonlinear equations. Therefore, S ...
... extensively in the literature and are usually based on off-line algorithms and the use of lookup tables. The well known Selective Harmonic Elimination (SHE) method [11] reduces the THD by removing low-order harmonics. The SHE method requires the solution of a set of nonlinear equations. Therefore, S ...
The ”digital” ADC
... The analog “problems” have been pushed to the encoding of the analog state as an FM coded variable. There are several ways to do this, but in the end, the quality of this encoding determines the overall performance. The most crucial parameter is the noise performance. Also linearity is important, bu ...
... The analog “problems” have been pushed to the encoding of the analog state as an FM coded variable. There are several ways to do this, but in the end, the quality of this encoding determines the overall performance. The most crucial parameter is the noise performance. Also linearity is important, bu ...
TR41.1.1-05-08-004-HP-Ring-Voltage
... of the Telecommunications Industry Association (TIA) in accordance with the provisions of Sections 6.4.1-6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of which provisions are hereby incorporated by ...
... of the Telecommunications Industry Association (TIA) in accordance with the provisions of Sections 6.4.1-6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of which provisions are hereby incorporated by ...
Lecture-2:Definition and Terminologies - Dr. Imtiaz Hussain
... • The AMPLITUDE of a sine wave is the maximum vertical distance reached, in either direction from the centre line of the wave. • As a sine wave is symmetrical about its centre line, the amplitude of the wave is half the peak to peak value. ...
... • The AMPLITUDE of a sine wave is the maximum vertical distance reached, in either direction from the centre line of the wave. • As a sine wave is symmetrical about its centre line, the amplitude of the wave is half the peak to peak value. ...
DMS-20PC-4/5/6-DCM - Murata Power Solutions
... connect a negative voltage across the rear terminals and the meters are fully operational! Negative-input DCM’s can be easily combined with positive-reading DMS-20PC-DCM’s for monitoring dual-polarity power supplies. Three versions are available: one for –4.50 to –19.99Vdc (0.01V resolution), one fo ...
... connect a negative voltage across the rear terminals and the meters are fully operational! Negative-input DCM’s can be easily combined with positive-reading DMS-20PC-DCM’s for monitoring dual-polarity power supplies. Three versions are available: one for –4.50 to –19.99Vdc (0.01V resolution), one fo ...
Electricity Distribution
... Step-up transformers are mainly used in power transmission to increase voltage to reduce energy loss. Some household appliances (such as older style CRT TVs) also increase voltages using step-up transformers. Step-down transformers are used in electricity substations to reduce the voltage to 230 V f ...
... Step-up transformers are mainly used in power transmission to increase voltage to reduce energy loss. Some household appliances (such as older style CRT TVs) also increase voltages using step-up transformers. Step-down transformers are used in electricity substations to reduce the voltage to 230 V f ...
document
... The Analog Front-End will be composed of at least four input lines from the mechanical probe. A minimum signal level for each of these lines is expected to be 100uV. The circuit begins with all probe amplification lines powered on. The clocking for the modulator blocks is set to achieve a modulation ...
... The Analog Front-End will be composed of at least four input lines from the mechanical probe. A minimum signal level for each of these lines is expected to be 100uV. The circuit begins with all probe amplification lines powered on. The clocking for the modulator blocks is set to achieve a modulation ...
Lesson 11
... interval where Rs = 1/Ts is the sampling rate (samples /sec). A standard sampling rate for speech signal, band limited to 3.4 kHz, is 8 Kilo-samples per second (Ts = 125μ sec), thus, obeying Nyquist’s sampling theorem. We assume instantaneous sampling for our discussion. The encoder in Fig 3.11.1 ge ...
... interval where Rs = 1/Ts is the sampling rate (samples /sec). A standard sampling rate for speech signal, band limited to 3.4 kHz, is 8 Kilo-samples per second (Ts = 125μ sec), thus, obeying Nyquist’s sampling theorem. We assume instantaneous sampling for our discussion. The encoder in Fig 3.11.1 ge ...
Experiment 9
... The speed of a DC Motor is directly proportional to the line voltage applied to it. Given a fixed DC source, VS, and a Power MOSFET to act as a switch, it is possible to control the average voltage applied to the motor using a technique called Pulse-Width Modulation (PWM). In the circuit shown in Fi ...
... The speed of a DC Motor is directly proportional to the line voltage applied to it. Given a fixed DC source, VS, and a Power MOSFET to act as a switch, it is possible to control the average voltage applied to the motor using a technique called Pulse-Width Modulation (PWM). In the circuit shown in Fi ...
Liebert PSA - AP09DPG-PSAV1
... Performance Power Protection for PCs and Office Equipment 500VA650VA1kVA1.5kVA ...
... Performance Power Protection for PCs and Office Equipment 500VA650VA1kVA1.5kVA ...
Data Sheet
... Inhibit Voltage (MT1–MT2 Voltage above which device will not trigger.) (IF = Rated IFT) Leakage in Inhibited State (IF = Rated IFT, Rated VDRM, Off State) Isolation Voltage (f = 60 Hz, t = 1 sec) ...
... Inhibit Voltage (MT1–MT2 Voltage above which device will not trigger.) (IF = Rated IFT) Leakage in Inhibited State (IF = Rated IFT, Rated VDRM, Off State) Isolation Voltage (f = 60 Hz, t = 1 sec) ...
Energy and Power
... circuitry that maintains the output voltage and current to the values that you set. There are some changes in the voltage from the wall ...
... circuitry that maintains the output voltage and current to the values that you set. There are some changes in the voltage from the wall ...
The Schmitt Trigger
... the output negative when the input passes upward through a positive reference voltage. It then uses negative feedback to prevent switching back to the other state until the input passes through a lower threshold voltage, thus stabilizing the switching against rapid triggering by noise as it passes t ...
... the output negative when the input passes upward through a positive reference voltage. It then uses negative feedback to prevent switching back to the other state until the input passes through a lower threshold voltage, thus stabilizing the switching against rapid triggering by noise as it passes t ...
Liebert® PSA
... The Liebert PSA is an economical, environmentally-friendly line-interactive UPS that offers full- featured power protection for small office computers and electronic equipment. Liebert Multilink software automatically powers down your computer in the event of an extended power outage. It also has fu ...
... The Liebert PSA is an economical, environmentally-friendly line-interactive UPS that offers full- featured power protection for small office computers and electronic equipment. Liebert Multilink software automatically powers down your computer in the event of an extended power outage. It also has fu ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.