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G201 STEP MOTOR DRIVE
G201 STEP MOTOR DRIVE

... The power supply voltage must be between 24 VDC and 80 VDC. The maximum power supply current required is 67% of the motor’s rated phase current. An unregulated power supply may be used as long as the voltage stays between the limits; keep the ripple voltage to 10% or less for best results. The drive ...
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... speakers. Engine sound simulation system is equipped with RC PLUS, a software platform for product configuration, video playing and changing engine sound. This software provides better application services to users but does not constitute a part that must be included in ESS product sales. Except the ...
EL DIABLO 100 Owners Manual
EL DIABLO 100 Owners Manual

... in conjunction with the Hot channel Gain Control. With a little experimentation, it will be easy to hear that driving the gain control in the maximum position is not as critical as on other amps. Articulate high gain splendor can be achieved without cranking the gain to 10. This switch should be in ...
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nti-power_quality_at.. - IDEAL INDUSTRIES, INC.

... system in the interior of a structure that extends from a final overload protective device to a plug receptacle or a load such as a lighting fixture, motor, or heater ...
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... strategy. For example, if at least two loads, one switch and one occupancy sensor are connected to the DLM local network, the system operates load A as Automatic ON, Automatic OFF and load B as Manual-On, Automatic-Off. See DLM device Quick Start Guides to determine how each device affects the PNG o ...
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Type EUA 3-Phase Sequence and Phase Loss Current and Voltage

... sequence/phase loss (closed circuit) • Measures when all 3 phases are present and have the correct phase sequence • Measures on own power supply • Knob-adjustable level setting • Output: Up to 3 x 5 A SPDT relay • For mounting on DIN-rail in accordance with ...
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... and a primary conductive path which can be elongated “track” or lumped “coil”. The main function of the power converter is to supply a constant high frequency AC current (normally a 10-100kHz current with a sinusoidal waveform) along the track loop, this part often referred to as the track power sup ...
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... The MAX8664 dual-output PWM controller is a low-cost solution for dual power-supply systems. It provides two individual outputs that operate 180° out-of-phase to minimize input capacitance requirements. Built-in drivers are capable of driving external MOSFETs to deliver up to 25A of current from eac ...
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... Input voltage range is single phase 85-265VAC(47-63Hz). Take care not to apply input voltage which is out specified range nor should a DC input voltage be applied as this would result into power supply damage. For cases where conformance to various safeties required, described as 100-240VAC (50-60Hz ...
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2015 General Question Pool

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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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