AN4704, 3-phase Sensorless BLDC Motor Control Kit with the S12
... electrical degrees after the point where a BEMF zero-crossing arises. The BEMF zero-crossing happens at a position of 30 electrical degrees after the point of the last commutation event. Let us assume that the motor is spinning at a constant velocity; in this case, the motor needs the same amount of ...
... electrical degrees after the point where a BEMF zero-crossing arises. The BEMF zero-crossing happens at a position of 30 electrical degrees after the point of the last commutation event. Let us assume that the motor is spinning at a constant velocity; in this case, the motor needs the same amount of ...
DN276 - LTC1564: A Digitally Tuned Antialiasing / Reconstruction Filter Simplifies High Performance DSP Design
... is only 33µVRMS (typical) at a 20kHz corner frequency and unity gain, which is 100dB below the rail-to-rail maximum signal level for ±5V supplies. The output-referred noise rises only slightly at higher gain settings. At the maximum 24dB (16V/V) gain setting, the same 20kHz response just quoted has ...
... is only 33µVRMS (typical) at a 20kHz corner frequency and unity gain, which is 100dB below the rail-to-rail maximum signal level for ±5V supplies. The output-referred noise rises only slightly at higher gain settings. At the maximum 24dB (16V/V) gain setting, the same 20kHz response just quoted has ...
Switching Ripple Characteristics of Space Vector PWM Schemes for
... with an odd number of phases, for the sinusoidal PWM and sinusoidal PWM with the nth harmonic injection. The analyses and findings of [12] have fully verified the results of [11] for the particular (five-phase) case. The most important conclusion of [12] is that the total flux HDF can only be obtain ...
... with an odd number of phases, for the sinusoidal PWM and sinusoidal PWM with the nth harmonic injection. The analyses and findings of [12] have fully verified the results of [11] for the particular (five-phase) case. The most important conclusion of [12] is that the total flux HDF can only be obtain ...
Как известно, основными техническими параметрами
... efficiency of air cleaning in a wide range of fragment sizes (η, %) ...
... efficiency of air cleaning in a wide range of fragment sizes (η, %) ...
Power Panel for SDN
... The Power Panel for SDN is a SDN bus distribution component used to add 10 isolated motor ports and two isolated device ports to an SDN bus segment. The isolated motor ports support up to 240 feet of power and data wiring to individual low voltage intelligent motors. The in-wall or on-wall mountable ...
... The Power Panel for SDN is a SDN bus distribution component used to add 10 isolated motor ports and two isolated device ports to an SDN bus segment. The isolated motor ports support up to 240 feet of power and data wiring to individual low voltage intelligent motors. The in-wall or on-wall mountable ...
PCS-9575 Static Frequency Converter
... The most common startup mode of large pumped storage power plants is static frequency conversion startup. The frequency conversion speed governing system features soft startup performance, small disturbance to grid, smooth increase in speed, high automation and high reliability. One set of frequency ...
... The most common startup mode of large pumped storage power plants is static frequency conversion startup. The frequency conversion speed governing system features soft startup performance, small disturbance to grid, smooth increase in speed, high automation and high reliability. One set of frequency ...
... external storage. The PV generator is properly derated to deliver a reduced power output than its maximum possible value and hence making its output dispatchable/controllable. The derated amount of power is kept aside and is used as reserve to supply the transients whenever required. In addition, th ...
Operational Amplifiers
... 0.001 V * ∞ = ∞ V 0.0001 V * ∞ = ∞ V 0.00001 V * ∞ = ∞ V 0.000001 V * ∞ = ∞ V 0.0000001 V * ∞ = ∞ V and so on. But an infinite voltage on the output would be terribly dangerous, and unusable! ...
... 0.001 V * ∞ = ∞ V 0.0001 V * ∞ = ∞ V 0.00001 V * ∞ = ∞ V 0.000001 V * ∞ = ∞ V 0.0000001 V * ∞ = ∞ V and so on. But an infinite voltage on the output would be terribly dangerous, and unusable! ...
MODEL 257 3-Phase Monitor
... When properly adjusted, the Model 257 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an electromechanical relay. When correct voltage and phase rotation are applied, the ...
... When properly adjusted, the Model 257 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an electromechanical relay. When correct voltage and phase rotation are applied, the ...
4.6 sOLAR POWER PLANT COMPONENT SPECIFICATION
... eliminates the need of separate UPS system. The inverter adopts the latest Sine modulation technology and uses IGBT’s as switching elements. ...
... eliminates the need of separate UPS system. The inverter adopts the latest Sine modulation technology and uses IGBT’s as switching elements. ...
EE1000 Project 2 Photo
... It is recommended that the photoresistors be separated by 4-5 inches at least so that pitch control and volume control do not interfere with each other. Note also that the behavior of the Theremin depends on the lighting of the room. If there are one or two overhead lights, the photoresistors will b ...
... It is recommended that the photoresistors be separated by 4-5 inches at least so that pitch control and volume control do not interfere with each other. Note also that the behavior of the Theremin depends on the lighting of the room. If there are one or two overhead lights, the photoresistors will b ...
Guide Specification for Ashley-Edison OSES Single Phase AC
... This specification covers the electrical aspects for an Outdoor AC Voltage Stabiliser / Converter that shall provide automatically stabilized and regulated power to sensitive electrical and electronic equipment. The Stabiliser should be based on the Servo Electronic design principle comprising a tra ...
... This specification covers the electrical aspects for an Outdoor AC Voltage Stabiliser / Converter that shall provide automatically stabilized and regulated power to sensitive electrical and electronic equipment. The Stabiliser should be based on the Servo Electronic design principle comprising a tra ...
MAX1761 Small, Dual, High-Efficiency Buck Controller for Notebooks General Description
... supplies in PC board area critical applications, such as notebook computers and smart phones. Maxim’s proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides “instant-on” response to load transients while maintaining ...
... supplies in PC board area critical applications, such as notebook computers and smart phones. Maxim’s proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides “instant-on” response to load transients while maintaining ...
TheAffordableCompactServoSolution
... Using easy motion program language, the MR-J2-C-S100 can be programmed with up to 60 easy steps. Built-in positioning Positioning can be carried out simply by selecting the appropriate programming number in the amplifier (8 programs). Position, speed, acceleration/ deceleration time and miscellaneou ...
... Using easy motion program language, the MR-J2-C-S100 can be programmed with up to 60 easy steps. Built-in positioning Positioning can be carried out simply by selecting the appropriate programming number in the amplifier (8 programs). Position, speed, acceleration/ deceleration time and miscellaneou ...
Effect of harmonics on current ratings and voltage drop
... The a.c. resistance ratios given in Table 1 can be used to derive derating factors, Cf, for cables carrying harmonic currents. Multiplying the 50 Hz conductor resistance by the appropriate factor, Cr, from the above table will give the resistance at that frequency. If Cr x Rf is substituted for Rh i ...
... The a.c. resistance ratios given in Table 1 can be used to derive derating factors, Cf, for cables carrying harmonic currents. Multiplying the 50 Hz conductor resistance by the appropriate factor, Cr, from the above table will give the resistance at that frequency. If Cr x Rf is substituted for Rh i ...
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.