Direct Torque and Flux Control.pdf
... estimation is usually based on the integration of the motor phase voltages. Due to the inevitable errors in the voltage measurement and stator resistance estimate the integrals tend to become erroneous at low speed. Thus it is not possible to control the motor if the output frequency of the variable ...
... estimation is usually based on the integration of the motor phase voltages. Due to the inevitable errors in the voltage measurement and stator resistance estimate the integrals tend to become erroneous at low speed. Thus it is not possible to control the motor if the output frequency of the variable ...
Advances in Data Reduction Techniques
... Another method for reducing the amount of data storage is by classification according to standard set of definitions. Standards such as IEEE Std 1159 and EN60150 allow a series of waveforms that meet the detailed criteria to be grouped together and saved as a single entity. For example, IEEE Std 11 ...
... Another method for reducing the amount of data storage is by classification according to standard set of definitions. Standards such as IEEE Std 1159 and EN60150 allow a series of waveforms that meet the detailed criteria to be grouped together and saved as a single entity. For example, IEEE Std 11 ...
DAC-ADC CW-1 - WordPress.com
... (DAC0800, DAC0808 are exact pin to pin equivalents.) The 1408 is an 8 bit R/2R ladder type D/A converter compatible with TTL and CMOS logic. It is designed to use where the output current is linear product of an eight bit digital word. The IC 1408 consists of a reference current amplifier, an R/2R l ...
... (DAC0800, DAC0808 are exact pin to pin equivalents.) The 1408 is an 8 bit R/2R ladder type D/A converter compatible with TTL and CMOS logic. It is designed to use where the output current is linear product of an eight bit digital word. The IC 1408 consists of a reference current amplifier, an R/2R l ...
Logic signal voltage levels
... Logic signal voltage levels Logic gate circuits are designed to input and output only two types of signals: "high" (1) and "low" (0), as represented by a variable voltage: full power supply voltage for a "high" state and zero voltage for a "low" state. In a perfect world, all logic circuit signals w ...
... Logic signal voltage levels Logic gate circuits are designed to input and output only two types of signals: "high" (1) and "low" (0), as represented by a variable voltage: full power supply voltage for a "high" state and zero voltage for a "low" state. In a perfect world, all logic circuit signals w ...
FAN6921ML Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller
... Detecting the valley voltage signal of drain voltage of the PWM switch to achieve the valley voltage switching and minimize the switching loss on the PWM switch. Providing output over-voltage protection. A voltage comparator is built-in to the DET pin. The DET pin detects the flat voltage throug ...
... Detecting the valley voltage signal of drain voltage of the PWM switch to achieve the valley voltage switching and minimize the switching loss on the PWM switch. Providing output over-voltage protection. A voltage comparator is built-in to the DET pin. The DET pin detects the flat voltage throug ...
LCL Filter Design for Grid-connected NPC Inverters
... grid impedances along such harmonic orders at the connection point; keeping in mind that a limit of 0.2% for harmonic voltage components between 2000 and 9000 Hz may not be surpassed. Since the frequency band from 2000 Hz to 9000 Hz was considered as being important to the characterization of freque ...
... grid impedances along such harmonic orders at the connection point; keeping in mind that a limit of 0.2% for harmonic voltage components between 2000 and 9000 Hz may not be surpassed. Since the frequency band from 2000 Hz to 9000 Hz was considered as being important to the characterization of freque ...
DAC1218 DAC1219 12-Bit Binary Multiplying D/A Converter (Rev. A)
... Note 3: This 500 mW specification applies for all packages. The low intrinsic power dissipation of this part (and the fact that there is no way to significantly modify the power dissipation) removes concern for heat sinking. Note 4: Both IOUT1 and IOUT2 must go to ground or the virtual ground of an ...
... Note 3: This 500 mW specification applies for all packages. The low intrinsic power dissipation of this part (and the fact that there is no way to significantly modify the power dissipation) removes concern for heat sinking. Note 4: Both IOUT1 and IOUT2 must go to ground or the virtual ground of an ...
TAP 126- 2: Measuring the charge on a capacitor
... Analysing the results Plot the readings for charge against voltage on common axes for the three capacitors. Do the shapes of your graphs support the idea that the charge stored varies in proportion to the voltage applied? Explain your reasoning. Calculate the gradient of each graph. The value obtain ...
... Analysing the results Plot the readings for charge against voltage on common axes for the three capacitors. Do the shapes of your graphs support the idea that the charge stored varies in proportion to the voltage applied? Explain your reasoning. Calculate the gradient of each graph. The value obtain ...
DP26806815
... usually the result of switching a load or energizing a capacitor bank. Incorrect tap settings on transformers can also result in over voltages. Under voltages are the result of events which are the reverse of events that cause over voltages switching in a load or switching of a capacitor bank. c. Su ...
... usually the result of switching a load or energizing a capacitor bank. Incorrect tap settings on transformers can also result in over voltages. Under voltages are the result of events which are the reverse of events that cause over voltages switching in a load or switching of a capacitor bank. c. Su ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... power exchange between the D-STATCOM and the Power system, such that the AC voltages at the bus bar can be regulated to improve the voltage profile of the power system, which is primary duty of the D-STATCOM. However a secondary damping function can be added in to the D-STATCOM for enhancing power s ...
... power exchange between the D-STATCOM and the Power system, such that the AC voltages at the bus bar can be regulated to improve the voltage profile of the power system, which is primary duty of the D-STATCOM. However a secondary damping function can be added in to the D-STATCOM for enhancing power s ...
TAP 126- 2: Measuring the charge on a capacitor
... Analysing the results Plot the readings for charge against voltage on common axes for the three capacitors. Do the shapes of your graphs support the idea that the charge stored varies in proportion to the voltage applied? Explain your reasoning. Calculate the gradient of each graph. The value obtain ...
... Analysing the results Plot the readings for charge against voltage on common axes for the three capacitors. Do the shapes of your graphs support the idea that the charge stored varies in proportion to the voltage applied? Explain your reasoning. Calculate the gradient of each graph. The value obtain ...
A DC18-91 XMT 400.qxd
... control. Great for applications that require a finer amperage control. Includes 28 ft (8.5 m) control cord. Extension Cords for Remote Controls and 24 VAC Wire Feeders #122 973 25 ft (7.6 m) #122 974 50 ft (15.2 m) #122 975 75 ft (22.8 m) ...
... control. Great for applications that require a finer amperage control. Includes 28 ft (8.5 m) control cord. Extension Cords for Remote Controls and 24 VAC Wire Feeders #122 973 25 ft (7.6 m) #122 974 50 ft (15.2 m) #122 975 75 ft (22.8 m) ...
EE 42/100 Lecture 19: AC Power
... A typical scenario might involve an AC generator at 18kV, a step-up to 345 kV for long range transmission, and then a step down to 45kV and then 4800V for commercial customers. ...
... A typical scenario might involve an AC generator at 18kV, a step-up to 345 kV for long range transmission, and then a step down to 45kV and then 4800V for commercial customers. ...
ZXTN25060BZ 60V, SOT89, NPN medium power transistor Summary Description
... Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices. The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent of damage can vary from immediat ...
... Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices. The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent of damage can vary from immediat ...
Low Current/High Resistance Measurements
... resistor is significantly smaller than the resistance of the DUT and the currents to be measured are not very small (not much lower than microamp level [10 –6A]), shunt ammeters work fine. ...
... resistor is significantly smaller than the resistance of the DUT and the currents to be measured are not very small (not much lower than microamp level [10 –6A]), shunt ammeters work fine. ...
Complete Paper
... power factor close to unity, higher speed and better efficiency. The motor operated with higher current harmonic distortion with low loads but lower current harmonic distortion at high loads. There for it is very good to operate the motor at high load up to 85% of its full load. Keywords: Designing ...
... power factor close to unity, higher speed and better efficiency. The motor operated with higher current harmonic distortion with low loads but lower current harmonic distortion at high loads. There for it is very good to operate the motor at high load up to 85% of its full load. Keywords: Designing ...
Stray Voltage - Pacific Gas and Electric Company
... Have you ever been shocked near a swimming pool when you touched a metal fixture, or even in your home, when you touched the showerhead fixture? And for dairy farmers, have you noticed a reduction in milk production? These may all be symptoms of stray voltage. What is Stray Voltage? Stray voltage is ...
... Have you ever been shocked near a swimming pool when you touched a metal fixture, or even in your home, when you touched the showerhead fixture? And for dairy farmers, have you noticed a reduction in milk production? These may all be symptoms of stray voltage. What is Stray Voltage? Stray voltage is ...
TIP120/TIP121/TIP122 NPN Epitaxial Darlington Transistor T IP
... SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: ...
... SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: ...
LF411 Low Offset Low Drift JFET Input Operational Amplifier
... Note 2: For operating at elevated temperature, these devices must be derated based on a thermal resistance of ijA. Note 3: These devices are available in both the commercial temperature range 0§ C s TA s 70§ C and the military temperature range b 55§ C s TA s 125§ C. The temperature range is designa ...
... Note 2: For operating at elevated temperature, these devices must be derated based on a thermal resistance of ijA. Note 3: These devices are available in both the commercial temperature range 0§ C s TA s 70§ C and the military temperature range b 55§ C s TA s 125§ C. The temperature range is designa ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... inverter and the execution time is greatly reduced. The dc-link neutral-point potential control algorithms are implemented more easily. And the proposed method can be applied to the multi-level inverters above three and five level. Keywords- Multilevel inverter, three level inverter, five level inve ...
... inverter and the execution time is greatly reduced. The dc-link neutral-point potential control algorithms are implemented more easily. And the proposed method can be applied to the multi-level inverters above three and five level. Keywords- Multilevel inverter, three level inverter, five level inve ...
An Autonomous Industrial Load Carrying Vehicle
... which emphasizes the importance of interaction between the robot and operator to facilitate situational awareness. Similar to the PdaDriver system, Keskinpala et al. [18] describe a PDA-based touch-screen interface for mobile robot control through which the user teleoperates a ground robot. In addit ...
... which emphasizes the importance of interaction between the robot and operator to facilitate situational awareness. Similar to the PdaDriver system, Keskinpala et al. [18] describe a PDA-based touch-screen interface for mobile robot control through which the user teleoperates a ground robot. In addit ...
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.