Open-Loop Torque Boost and Simple Slip Frequency Compensation
... voltage and keeping the magnitude of the stator flux constant. The simple slip frequency compensation, based on an estimation of the air-gap power and a linear torquespeed approximation, is also introduced. This method reduces the steady-state speed error to almost zero. The nameplate data and only ...
... voltage and keeping the magnitude of the stator flux constant. The simple slip frequency compensation, based on an estimation of the air-gap power and a linear torquespeed approximation, is also introduced. This method reduces the steady-state speed error to almost zero. The nameplate data and only ...
Capacitor Start and Capacitor Start/Capacitor
... voltage sensing information which can be used to extract speed data from the voltage across the motor start (auxiliary) winding. By comparing this start (auxiliary) winding RPM-sensitive voltage to the main AC input voltage (which serves as a reference voltage), the switch determines when the start ...
... voltage sensing information which can be used to extract speed data from the voltage across the motor start (auxiliary) winding. By comparing this start (auxiliary) winding RPM-sensitive voltage to the main AC input voltage (which serves as a reference voltage), the switch determines when the start ...
constant temperature anemometer with duty
... PSPICE model and two configurations were simulated: constant temperature and constant power. It has been reported that CTA anemometers improve significantly the time response in comparing with constant power mode [3]. Figure 4 shows the time response of the CTA and Figure 5 shows the time response o ...
... PSPICE model and two configurations were simulated: constant temperature and constant power. It has been reported that CTA anemometers improve significantly the time response in comparing with constant power mode [3]. Figure 4 shows the time response of the CTA and Figure 5 shows the time response o ...
AE User Port (based on C3): Pin Descriptions
... Analog Input The set point and DC bias signal from the user (pins 5 and 7) are a 0 V to 10 V scaled analog signals. Digital Outputs The status signals provided by the generator (pins 12, 14, 22 and 24) are opto-coupled with NPN transistor outputs. The collector and emitter of each transistor are pro ...
... Analog Input The set point and DC bias signal from the user (pins 5 and 7) are a 0 V to 10 V scaled analog signals. Digital Outputs The status signals provided by the generator (pins 12, 14, 22 and 24) are opto-coupled with NPN transistor outputs. The collector and emitter of each transistor are pro ...
Model 563H Data Sheet
... Calibration: 3-position switch: Plus Shunt CAL, Minus Shunt CAL, and Operate. ...
... Calibration: 3-position switch: Plus Shunt CAL, Minus Shunt CAL, and Operate. ...
10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Features
... When all the ports are configured as logic inputs or outputs (all output registers set to value 0x00 or 0x01) or LED off (output register set to value 0xFF), the MAX6966/MAX6967 operate at their lowest supply current, called standby mode. When PWM intensity control is used (one or more output regist ...
... When all the ports are configured as logic inputs or outputs (all output registers set to value 0x00 or 0x01) or LED off (output register set to value 0xFF), the MAX6966/MAX6967 operate at their lowest supply current, called standby mode. When PWM intensity control is used (one or more output regist ...
Chaos rules! Chapter 20
... thresholds. If it is always true that |V n + 2 − V n + 1| < |V n + 1 − V n | then the doublings become more and more closely spaced as we increase the voltage. When this is the case it becomes possible to pass through an infinite number of doublings while V b remains finite. This is called a Cascade ...
... thresholds. If it is always true that |V n + 2 − V n + 1| < |V n + 1 − V n | then the doublings become more and more closely spaced as we increase the voltage. When this is the case it becomes possible to pass through an infinite number of doublings while V b remains finite. This is called a Cascade ...
psd_Feb2013 - Indico
... control (hardware and software). • The readout would be done in another way (DRS, TRB3…) • The resources and manpower are needed. • In present FEE one needs to repair two sections in one outer modules (short circuit during intervention), to repair one adder in central module (result of power cut at ...
... control (hardware and software). • The readout would be done in another way (DRS, TRB3…) • The resources and manpower are needed. • In present FEE one needs to repair two sections in one outer modules (short circuit during intervention), to repair one adder in central module (result of power cut at ...
Considerations for the Application of Thyristor Controlled Series
... In distribution systems, reactive power compensation is typically provided by shunt-connected components, such as SVC and STATCOM devices. Fixed series capacitors are clearly the most economical solution, but their optimal location is not easy to determine, when many loads are connected to the distr ...
... In distribution systems, reactive power compensation is typically provided by shunt-connected components, such as SVC and STATCOM devices. Fixed series capacitors are clearly the most economical solution, but their optimal location is not easy to determine, when many loads are connected to the distr ...
Diodes and Bridge Rectifiers - Electrical and Computer Engineering
... Overview: The purpose of this experiment is to introduce diode rectifier circuits used in DC power supplies. Almost all electronic systems require at least one DC power supply that converts AC line voltage (most often 120VAC @ 60 Hz) to DC voltage (typically 5 to 20 VDC). To accomplish this, diodes ...
... Overview: The purpose of this experiment is to introduce diode rectifier circuits used in DC power supplies. Almost all electronic systems require at least one DC power supply that converts AC line voltage (most often 120VAC @ 60 Hz) to DC voltage (typically 5 to 20 VDC). To accomplish this, diodes ...
1.1 Introduction
... chosen resistance and capacitance values, and how these values were chosen. (15 pts) ...
... chosen resistance and capacitance values, and how these values were chosen. (15 pts) ...
isscc 2012 / session 18 / innovative circuits in
... transistors with reasonable channel lengths (≥2µm) have a cut-off frequency below 13.56MHz, the base carrier frequency of HF communication, present technologies on foil do not yet allow to extract the circuit clock as a fraction of the base carrier. We solve this by introducing an original uplink (r ...
... transistors with reasonable channel lengths (≥2µm) have a cut-off frequency below 13.56MHz, the base carrier frequency of HF communication, present technologies on foil do not yet allow to extract the circuit clock as a fraction of the base carrier. We solve this by introducing an original uplink (r ...
MAX9737 Mono 7W Class D Amplifier General Description Features
... Note 1: Thermal performance of this device is highly dependent on PCB layout. See the Applications Information section for more detail. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on ...
... Note 1: Thermal performance of this device is highly dependent on PCB layout. See the Applications Information section for more detail. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on ...
Midterm 1 - University of California, Berkeley
... Increase Wn, or decrease Wp/Wn ratio. This also decreases VM. ...
... Increase Wn, or decrease Wp/Wn ratio. This also decreases VM. ...
MAX5075 Push-Pull FET Driver with Integrated Oscillator and Clock Output General Description
... The MAX5075 is a +4.5V to +15V push-pull, current-fed topology driver subsystem with an integrated oscillator for use in 48V module power supplies. The MAX5075 features a programmable, accurate integrated oscillator with a synchronizing clock output that can be used to synchronize an external PWM st ...
... The MAX5075 is a +4.5V to +15V push-pull, current-fed topology driver subsystem with an integrated oscillator for use in 48V module power supplies. The MAX5075 features a programmable, accurate integrated oscillator with a synchronizing clock output that can be used to synchronize an external PWM st ...
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.