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BUL416T
BUL416T

... VCE = 1600 V VCE = 1600 V ...
MODEL 2681 Voltage Band Monitor
MODEL 2681 Voltage Band Monitor

... coated liberally with a good quality silicone grease, such as Dow Corning DC-4 or DC-4X. Insert the unit into the socket and wipe off excess grease around the base. This will prevent the entrance of moisture and other contaminates into the base and socket areas. ...
a CMOS Complete DDS AD9831
a CMOS Complete DDS AD9831

... The AD9831 is tested with a capacitive load of 50 pF. The part can be operated with higher capacitive loads, but the magnitude of the analog output will be attenuated. For example, a 5 MHz output signal will be attenuated by 3 dB when the load capacitance equals 85 pF. Specifications subject to chan ...
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... read off voltage (make ohmmeter) ...
Analog signal chain design considerations
Analog signal chain design considerations

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KA319 Dual Comparator Features Description

... The KA319 is a dual high speed voltage comparator designed to operate from a single +5V supply up to ±15V dual supplies. Open collector of the output stage makes the KA319 compatible with RTL, DTL and TTL as well as capable of driving lamps and relays at currents up to 25mA. Typical response time of ...
Neptune 200KW-650KW Load Bank Product Brochure
Neptune 200KW-650KW Load Bank Product Brochure

... External or internal from load bus. Control circuits at 120V via transformer. The cooling fan operates at 3-phase line voltage. Load control circuits and fan motor control operate at 120V. Control circuits are fused. Control circuit fuses are 100,000 A.I.C., 600V rated. External, 480/240V, supply fo ...
Vehicle Power Plant and Transmission Characteristics
Vehicle Power Plant and Transmission Characteristics

... increases. The magnitude of torque at a given slip also increases with increase in slip with the exception of unity slip (starting condition). fs=10Hz fs=30Hz fs=50Hz ...
High-performance differential VCO based on armstrong oscillator
High-performance differential VCO based on armstrong oscillator

... consumption. Large transistors may also suffer from the degradation in noise performance at gigahertz frequencies because the transistor current gain begins to decrease. The output is taken from the emitter resistors and fed to a buffer stage. The use of emitter degeneration resistors enhances the p ...
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... The Optimal Voltage Regulator Placement module is centered on robust algorithms and used-defined criteria to provide users with results that are both trust-worthy and operationally acceptable. Customization of the reports is possible to allow: ...
The Micro Magician robot controller is the perfect choice
The Micro Magician robot controller is the perfect choice

... Reverse polarity protection rated at 6A for protecting servos and motor driver IC Reverse polarity protection rated at 3A for logic and other 3.3V devices Built in USB using the CP2102 interface IC Built in dual FET "H" bridge with current limiting, motor stall detection and electronic braking Built ...
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LABORATORY OF ANALOG SIGNAL PROCESSING AND DIGITIZING

Modern Drive Technology
Modern Drive Technology

... controllable speed ranges from about 5 times base speed down to zero speed. The constant horsepower range is about 3.5 times the base speed. Smooth stopping and highly efficient operation may be attained by using a vector control. A standard vector control with dynamic brake (D.B) resistor may be us ...
M2 : DC Machines
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... servomotors. Large DC machines are used in industry. A wide variety of volt-ampere or torquespeed characteristics can be obtained from various connections of the field windings. The DC machine is extensively used as a motor in industry. Its speed can be controlled over a wide range with relative eas ...
FSGM0565RB Green-Mode Fairchild Power Switch (FPS™)  FSGM
FSGM0565RB Green-Mode Fairchild Power Switch (FPS™) FSGM

... power SenseFET until the fault condition is eliminated. Because these protection circuits are fully integrated into the IC without external components, the reliability is improved without increasing cost. ...
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... drift performance by about 0.5µV/°C for each millivolt of adjusted offset. Note that the trim (Figure 1) is similar to operational amplifiers such as LF156 and OP-16. The OPA606 can replace most other amplifiers by leaving the external null circuit unconnected. ...
ADF7023 - Analog Devices
ADF7023 - Analog Devices

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... - only one/single path is connected between each Distribution and substation is called radial Distribution system. - Fault occurs either on feeder or a distributor, all the consumers connected to that distributor will get affected. ...
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Bidirectional Rotation of an Induction Motor with A Remote

Low Power Consumption Digital Signal Processor: Hi-Perion
Low Power Consumption Digital Signal Processor: Hi-Perion

... is shown in Figure 1. It consists of a DSP core and peripheral circuits. The basic architecture is an improved Harvard architecture, which is a very simple structure for minimizing power consumption. This DSP has an instruction word length and data word length of 16 bits. The instruction set has bee ...
97043
97043

uniblock ubsf
uniblock ubsf

... Frequency conversion ... with UNIBLOCK UBSF technology. Many industrial applications as well as naval power systems require a power supply with a frequency of 60Hz. As this cannot be provided by the utilities, converters are employed which, on one hand, provide the necessary voltage and frequency, ...
ANLPS300: How to Power GSM/GPRS/EDGE/3G/HSPA M2M Modems General Description
ANLPS300: How to Power GSM/GPRS/EDGE/3G/HSPA M2M Modems General Description

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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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