DESIGN OF INVERTER DRIVE FOR AC INDUCTION MOTOR
... motor’s speed, but can improve the motor’s dynamic and steady state characteristics. In addition, electronics can reduce the system’s average power consumption and noise generation of the motor. Induction motor control is complex due to its nonlinear characteristics. While there are different method ...
... motor’s speed, but can improve the motor’s dynamic and steady state characteristics. In addition, electronics can reduce the system’s average power consumption and noise generation of the motor. Induction motor control is complex due to its nonlinear characteristics. While there are different method ...
TekScope THS700 Series Handheld Digital Oscillscopes
... nel and damage to circuitry when working with a mix of low and high voltages or allowing non-invasive probing of “floating” differential communication links. The DMM input is isolated from the scope channels, allowing safe measurement of three independent sources. Digital Real-time Sampling The THS7 ...
... nel and damage to circuitry when working with a mix of low and high voltages or allowing non-invasive probing of “floating” differential communication links. The DMM input is isolated from the scope channels, allowing safe measurement of three independent sources. Digital Real-time Sampling The THS7 ...
g Accelerometers ADXL278 i
... including excellent transient response and high speed switching capabilities. Arbitrary force waveforms can be applied to the sensor by modulating the self-test input, such as test signals to measure the system frequency response or even crash signals to verify algorithms within the limits of the se ...
... including excellent transient response and high speed switching capabilities. Arbitrary force waveforms can be applied to the sensor by modulating the self-test input, such as test signals to measure the system frequency response or even crash signals to verify algorithms within the limits of the se ...
Cell Voltage Calibration
... The VCELL+ signal is inverted – the smaller the Cell Voltage, the higher the VCELL+ amplitude. The delta between Vcell and AFE channel offset (i.e. value a) = the scaled cell voltage = Actual cell voltage * 0.15 ...
... The VCELL+ signal is inverted – the smaller the Cell Voltage, the higher the VCELL+ amplitude. The delta between Vcell and AFE channel offset (i.e. value a) = the scaled cell voltage = Actual cell voltage * 0.15 ...
The dB in Communications
... approximately 1.95 volts must be present across the 600 ohm input. The term dBm also applies to communication systems which have a standard termination impedance other than 600 ohms. For example, video and some RF systems are terminated with 75 ohms. The 0dBm value is still defined as 1mW but measur ...
... approximately 1.95 volts must be present across the 600 ohm input. The term dBm also applies to communication systems which have a standard termination impedance other than 600 ohms. For example, video and some RF systems are terminated with 75 ohms. The 0dBm value is still defined as 1mW but measur ...
More Switching Power Supplies
... variety of wire sizes, but remember to bring a small screwdriver if you’re operating from a portable location. According to the instructions, the KPS-15 protection circuits will shut the supply off in the event of excessive heat buildup or excessive output voltage or current. A temperature controlle ...
... variety of wire sizes, but remember to bring a small screwdriver if you’re operating from a portable location. According to the instructions, the KPS-15 protection circuits will shut the supply off in the event of excessive heat buildup or excessive output voltage or current. A temperature controlle ...
Digital and Pulse-Train Conditioning
... receive it. (See Figure 11.05.) Small optical couplers isolate voltages up to 500 V. For example, this technique effectively controls and monitors digital devices connected between dissimilar grounds. ...
... receive it. (See Figure 11.05.) Small optical couplers isolate voltages up to 500 V. For example, this technique effectively controls and monitors digital devices connected between dissimilar grounds. ...
FAN4800AS/CS/01S/2S PFC/PWM Controller Combination FA N
... The FAN4800AS/CS/01S/02S consist of an average current controlled, continuous-boost, Power Factor Correction (PFC) front-end and a synchronized Pulse Width Modulator (PWM) back-end. The PWM can be used in current or voltage mode. In voltage mode, feedforward from the PFC output bus can help improve ...
... The FAN4800AS/CS/01S/02S consist of an average current controlled, continuous-boost, Power Factor Correction (PFC) front-end and a synchronized Pulse Width Modulator (PWM) back-end. The PWM can be used in current or voltage mode. In voltage mode, feedforward from the PFC output bus can help improve ...
FAN5308 800mA High-Efficiency Step-Down DC-DC Converter F AN53
... minimize voltage stress to the device resulting from everpresent switching spikes, use an input bypass capacitor with low ESR. Note that the peak amplitude of the switching spikes depends upon the load current; the higher the load current, the higher the switching spikes. The resistor divider that s ...
... minimize voltage stress to the device resulting from everpresent switching spikes, use an input bypass capacitor with low ESR. Note that the peak amplitude of the switching spikes depends upon the load current; the higher the load current, the higher the switching spikes. The resistor divider that s ...
MAX5950 12V PWM Controller with Hot-Swap General Description Features
... The MAX5950 features a hot-swap controller that provides inrush current control during module insertion and removal, as well as short-circuit protection during normal operation. The MAX5950 features an internal charge pump that provides the gate drive for an external n-channel MOSFET. A DCENO logic ...
... The MAX5950 features a hot-swap controller that provides inrush current control during module insertion and removal, as well as short-circuit protection during normal operation. The MAX5950 features an internal charge pump that provides the gate drive for an external n-channel MOSFET. A DCENO logic ...
LA125-P - RGB Automatyka
... Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inac ...
... Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inac ...
power factor - EPE Chat Zone
... and the Grid and not actually being used in doing any real work. Reactive Power is the part of the Apparent Power that is only used to repeatedly generate an electric field in the capacitive part of a load or the magnetic field in the inductive part of a load. Reactive Power is measured in VARs or V ...
... and the Grid and not actually being used in doing any real work. Reactive Power is the part of the Apparent Power that is only used to repeatedly generate an electric field in the capacitive part of a load or the magnetic field in the inductive part of a load. Reactive Power is measured in VARs or V ...
Lab1-2015
... closes for this experiment, you can just imagine that it is there. No need to use a real part.) Since S1 is always open, there is no current going through R1. Thus, there is no voltage drop across R1. Therefore, the voltages on both terminals of R1 are supposed to be same and equal the output voltag ...
... closes for this experiment, you can just imagine that it is there. No need to use a real part.) Since S1 is always open, there is no current going through R1. Thus, there is no voltage drop across R1. Therefore, the voltages on both terminals of R1 are supposed to be same and equal the output voltag ...
MAX5021/MAX5022 Current-Mode PWM Controllers for Isolated Power Supplies General Description
... less than the UVLO start threshold, the IC typically consumes only 50µA of quiescent current. This low startup current and the large UVLO hysteresis combined with the use of a ceramic capacitor C2 keeps the power dissipation in RS to less than 1/4W even at the high end of the universal AC input volt ...
... less than the UVLO start threshold, the IC typically consumes only 50µA of quiescent current. This low startup current and the large UVLO hysteresis combined with the use of a ceramic capacitor C2 keeps the power dissipation in RS to less than 1/4W even at the high end of the universal AC input volt ...
AN1882 The NE568A as a wideband FM modulator
... 20 superimposed on a DC common mode voltage 4.8V above ground. In order to provide a low impedance ground referenced output signal, a gain-of-two buffer amplifier (NE5539) is added. The output impedance is 75Ω. Note that the buffer amp differential input resistance is kept relatively high in order t ...
... 20 superimposed on a DC common mode voltage 4.8V above ground. In order to provide a low impedance ground referenced output signal, a gain-of-two buffer amplifier (NE5539) is added. The output impedance is 75Ω. Note that the buffer amp differential input resistance is kept relatively high in order t ...
Reducing high frequency ground currents to zero
... eliminates both motor-frame and VFD-frame voltage to ground. This highly effective grounding, in turn, reduces unplanned downtime and increases mean-time-betweenfailure (MTBF). The approach allows grounding techniques to “catch up” to the recent changes in today’s high-speed electronic systems. For ...
... eliminates both motor-frame and VFD-frame voltage to ground. This highly effective grounding, in turn, reduces unplanned downtime and increases mean-time-betweenfailure (MTBF). The approach allows grounding techniques to “catch up” to the recent changes in today’s high-speed electronic systems. For ...
Generator dc - schoolphysics
... press against a split ring of copper. This means that a varying but unidirectional e.m.f will be produced. A d.c generator and its output is shown in simplified form in Figure 1. As with the a.c. generator, the d.c. machine usually uses rotating field coils, a series of them being wound round in the ...
... press against a split ring of copper. This means that a varying but unidirectional e.m.f will be produced. A d.c generator and its output is shown in simplified form in Figure 1. As with the a.c. generator, the d.c. machine usually uses rotating field coils, a series of them being wound round in the ...
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.