VFDs: Do`s and Don`ts - PNWS-AWWA
... thrust bearings need this minimum speed to operate properly When starting/stopping the time from 0 hz to 30 hz has to be no more than 1 second – if longer a shorter motor life can be expected If the installation allows for it, coasting to stop rather than a ramp stop is preferred ...
... thrust bearings need this minimum speed to operate properly When starting/stopping the time from 0 hz to 30 hz has to be no more than 1 second – if longer a shorter motor life can be expected If the installation allows for it, coasting to stop rather than a ramp stop is preferred ...
Frequency Switching Speed in Microwave Signal
... generate a few more, let’s take our signal generator apart and see what contributes, and why. First we should define what we mean by “frequency switching speed.” For the purposes of this article we will define it as the time it takes to move the output frequency of a synthesizer from frequency A to ...
... generate a few more, let’s take our signal generator apart and see what contributes, and why. First we should define what we mean by “frequency switching speed.” For the purposes of this article we will define it as the time it takes to move the output frequency of a synthesizer from frequency A to ...
AC Magnitude and Phase
... of the CH-1 and CH-2 waveforms. Determine the time difference Δt between the waves. Indicate which channel arrives at the reference point first--this channel is said to "lead". Record these values on the data sheet. 10. The measure function displays the wave periods. Record the period on the data sh ...
... of the CH-1 and CH-2 waveforms. Determine the time difference Δt between the waves. Indicate which channel arrives at the reference point first--this channel is said to "lead". Record these values on the data sheet. 10. The measure function displays the wave periods. Record the period on the data sh ...
Power Control in AC Circuits Using an AC Chopper
... AC-to-AC converters have a wide range use in the industry. Applications such as light dimmers, AC motor controllers, heat controllers, uninterruptable power supplies are some examples for AC-AC converters. There are many different types of AC converters but basically, they produce an output voltage ...
... AC-to-AC converters have a wide range use in the industry. Applications such as light dimmers, AC motor controllers, heat controllers, uninterruptable power supplies are some examples for AC-AC converters. There are many different types of AC converters but basically, they produce an output voltage ...
D2400 GPRS Manual
... Maximum 13.9V, minimum 13.5V Output ripple Less than 0.25V peak to peak at full rated output Maximum output current at full load D1551 – 1A, D1553 – 3A, D1555 – 5A Battery charging current and voltage 300mA maximum at 13.7V float charge voltage Minimum standby output voltage 9.6V Maximum Po ...
... Maximum 13.9V, minimum 13.5V Output ripple Less than 0.25V peak to peak at full rated output Maximum output current at full load D1551 – 1A, D1553 – 3A, D1555 – 5A Battery charging current and voltage 300mA maximum at 13.7V float charge voltage Minimum standby output voltage 9.6V Maximum Po ...
DC current transducer DK-B420 B IPN = 150 .. 400 A
... ●● Power supplies DC power or auxiliary loads measurement ●● Electric heating elements Faster response than temperature sensors. ...
... ●● Power supplies DC power or auxiliary loads measurement ●● Electric heating elements Faster response than temperature sensors. ...
oscillators and multivbrators
... Bistable Multivibrators using 555 IC Trainer 12V DC Power supply Different value capacitors & resistors ...
... Bistable Multivibrators using 555 IC Trainer 12V DC Power supply Different value capacitors & resistors ...
The United Kingdom Amateur Radio (Foundation) Licence
... Lesson 3 – Technical Basics This means that the frequency of that particular wave was 1Hz – Hertz (Hz) referring to the frequency. On older radios, the frequency dial may be measured as c/s (cycles per second), this relates to cycles per second, which was used prior to the introduction of the Hz as ...
... Lesson 3 – Technical Basics This means that the frequency of that particular wave was 1Hz – Hertz (Hz) referring to the frequency. On older radios, the frequency dial may be measured as c/s (cycles per second), this relates to cycles per second, which was used prior to the introduction of the Hz as ...
ISL705XRHEVAL1Z User Guide
... The middle position has the ISL705BRH installed and is set-up as a 5V window detector. The VDD monitors for UV and the PFI for OV via the R5, R6 divider. The PFO output is inverted and connected to the manual reset input (MR) via U4. Hence, a reset signal is generated when 4.64V < VDD > 5.38V. Witho ...
... The middle position has the ISL705BRH installed and is set-up as a 5V window detector. The VDD monitors for UV and the PFI for OV via the R5, R6 divider. The PFO output is inverted and connected to the manual reset input (MR) via U4. Hence, a reset signal is generated when 4.64V < VDD > 5.38V. Witho ...
Three-phase to Single-phase Cyclo-converters
... converters are needed, whereas earlier, six thyristors are used for each bridge converter, needing a total of 12 devices. This means that the cost is much lower, as also the control circuit in this Version 2 EE IIT, Kharagpur 7 ...
... converters are needed, whereas earlier, six thyristors are used for each bridge converter, needing a total of 12 devices. This means that the cost is much lower, as also the control circuit in this Version 2 EE IIT, Kharagpur 7 ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... supply. The most widely used PWM technique used for Voltage Source inverter is carrier based sinusoidal pulse width modulation in which we compare two signals, sinusoidal wave and triangular wave with relational operator. A fixed dc input voltage is given to the inverter and controlled output voltag ...
... supply. The most widely used PWM technique used for Voltage Source inverter is carrier based sinusoidal pulse width modulation in which we compare two signals, sinusoidal wave and triangular wave with relational operator. A fixed dc input voltage is given to the inverter and controlled output voltag ...
Wind Energy Unit EEE www.edibon.com Technical Teaching Equipment
... The aerogenerator incidence angle can be modified to simulate different weather conditions and it's possible to set different blade configurations (aerogenerator with 6, 3 or 2 blades). This unit allows to change the angle of every blade, as each one embeds its own calibrated protractor. The blades ...
... The aerogenerator incidence angle can be modified to simulate different weather conditions and it's possible to set different blade configurations (aerogenerator with 6, 3 or 2 blades). This unit allows to change the angle of every blade, as each one embeds its own calibrated protractor. The blades ...
Arduino
... Capacitor ◦ Stores Electrical Energy ◦ Units in Farads (capacitance) ◦ Like a battery, but electrical instead of chemical ...
... Capacitor ◦ Stores Electrical Energy ◦ Units in Farads (capacitance) ◦ Like a battery, but electrical instead of chemical ...
Solar Power DC
... •Solar cell current depends on area and light intensity. As an effect its important to control current in an application. •This can be done either by limiting current to a certain value or controlling power circuit to operate in most efficient manner. •This is accomplished by keeping I/p voltage to ...
... •Solar cell current depends on area and light intensity. As an effect its important to control current in an application. •This can be done either by limiting current to a certain value or controlling power circuit to operate in most efficient manner. •This is accomplished by keeping I/p voltage to ...
OM2324102416
... Recently, the demand for dc/dc converters with high voltage gain has increased. The energy shortage and the atmosphere pollution have led to more researches on the renewable and green energy sources such as the solar arrays and the fuel cells. Moreover, the power systems based on battery sources and ...
... Recently, the demand for dc/dc converters with high voltage gain has increased. The energy shortage and the atmosphere pollution have led to more researches on the renewable and green energy sources such as the solar arrays and the fuel cells. Moreover, the power systems based on battery sources and ...
BT31482484
... later for mask preparation during fabrication process. So layout is a heart of all over the circuit design because it transfers the circuit into real world. After the layout design we check it for certain rules known as DRC (Design Rule Check) and LVS (Layout versus Schematic) check. When our layout ...
... later for mask preparation during fabrication process. So layout is a heart of all over the circuit design because it transfers the circuit into real world. After the layout design we check it for certain rules known as DRC (Design Rule Check) and LVS (Layout versus Schematic) check. When our layout ...
DIY Kit189. 120 Second Vioce Recorder Module
... The ISD1700 series of chips offer a wide range of message durations, ranging from 30 seconds up to 240 seconds depending on the chip. The sampling frequency of each chip can also be adjusted from 4 kHz to 12 kHz with an external resistor, giving greater flexibility in duration versus recording quali ...
... The ISD1700 series of chips offer a wide range of message durations, ranging from 30 seconds up to 240 seconds depending on the chip. The sampling frequency of each chip can also be adjusted from 4 kHz to 12 kHz with an external resistor, giving greater flexibility in duration versus recording quali ...
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.