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Geen diatitel
Geen diatitel

VCO-3500S 数据资料DataSheet下载
VCO-3500S 数据资料DataSheet下载

... Caution! ESD sensitive device. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional op ...
DN182 - The LT1167: Single Resistor Sets the Gain of the Best Instrumentation Amplifier
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MAX17499/MAX17500 Current-Mode PWM Controllers with Programmable Switching Frequency General Description
MAX17499/MAX17500 Current-Mode PWM Controllers with Programmable Switching Frequency General Description

... The MAX17499/MAX17500 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX17499 is well suited for low input voltage (9.5V DC to 24V DC) power supplies. The MAX17500 is well suited for universal ...
Document
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Lab 10 - Rose
Lab 10 - Rose

... DM-100A as a separately-excited generator. Make sure that the armature circuit of the generator has no load connected to it. Use the 6A dc power supply for one of the field supplies. Note that the entire test is done at the rated speed of 1800 RPM. ...
The_Pulse_of_the_Silent_Thriller
The_Pulse_of_the_Silent_Thriller

... Another possibility is a variant of the original global busbar monitoring system. Here, instead of adding the two half-circuit voltages and subtracting from them the two scaled reference magnet voltages, we just subtract one of the half-circuit voltages from the other. An overheating splice on one s ...
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Linear Integrated Circuits

... transducers. The output of transducer has to be amplified So that it can drive the indicator or display system. This function is performed by an instrumentation amplifier ...


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... convenient way to evaluate and integrate a complete high-efficiency non-synchronous buck converter design. No additional components are required, other than dc supplies for the input voltage and enable pin. The board can also be connected to an external clock source to synchronize the switching freq ...
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... A block diagram of the control circuitty for the IGBT pulse generator is shown in Figure 3. A "NIM"input signal is converted to a CMOS pulse, that activates Timer 1.The output of this timer controls the beginning and the duration of the Ql and Q2 conducting periods, and limits the maximum rise time ...
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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.
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