Selection and Modeling of PMBLDC Motor for Torque Ripple
... The parameter of 500 W BLDC motor is represented by Table I and its back-EMF is shown in Fig. 4. The back-EMF is obtained by experiment and inductances of each phase are measured by digital LCR meter. The 500WBLDC motor is simulated by the Mat lab with the parameters of that is not only the BLDC mot ...
... The parameter of 500 W BLDC motor is represented by Table I and its back-EMF is shown in Fig. 4. The back-EMF is obtained by experiment and inductances of each phase are measured by digital LCR meter. The 500WBLDC motor is simulated by the Mat lab with the parameters of that is not only the BLDC mot ...
A METHOD TO DETERMINE THE RELATIVE LOCATION OF
... When a motor starts, inrush current which is 5~10 times of rational current is absorbed into the motor and it lasts until the motor reaches steady state. The occurrence of inrush current makes the motor as a energy sink. Therefore the voltage drops and voltage sag happens. The waveform at PCC during ...
... When a motor starts, inrush current which is 5~10 times of rational current is absorbed into the motor and it lasts until the motor reaches steady state. The occurrence of inrush current makes the motor as a energy sink. Therefore the voltage drops and voltage sag happens. The waveform at PCC during ...
Section 3: Switching Regulators
... Also, like switchmode power conversion, linear power conversion and charge pump technology offer both regulators and controllers. So within the field of power conversion, the terms “regulator” and “controller” can have wide meaning. The most basic switcher topologies require only one transistor whic ...
... Also, like switchmode power conversion, linear power conversion and charge pump technology offer both regulators and controllers. So within the field of power conversion, the terms “regulator” and “controller” can have wide meaning. The most basic switcher topologies require only one transistor whic ...
Evaluates: MAX14591 MAX14591 Evaluation Kit General Description Quick Start
... The MAX14591 EV kit is a fully assembled and tested circuit board that demonstrates the functionality of the MAX14591 high-speed, open-drain capable logic-level translator in both the 8-bump WLP and 8-pin TDFN packages. The EV kit features enables direct evaluation of the device by multiple jumper-s ...
... The MAX14591 EV kit is a fully assembled and tested circuit board that demonstrates the functionality of the MAX14591 high-speed, open-drain capable logic-level translator in both the 8-bump WLP and 8-pin TDFN packages. The EV kit features enables direct evaluation of the device by multiple jumper-s ...
Variable Frequency Drives for conveyor starting
... The VFD has the capability to perform active load sharing between multiple motors on the same conveyor. Generally this load sharing system works as follows: One VFD assumes the function of the master, and the others function as followers. The master VFD sends its actual speed to the follower, which ...
... The VFD has the capability to perform active load sharing between multiple motors on the same conveyor. Generally this load sharing system works as follows: One VFD assumes the function of the master, and the others function as followers. The master VFD sends its actual speed to the follower, which ...
analysis of pmsg based wind energy conversion system operating
... torsional oscillations caused by drive-train characteristics. The grid-side control is utilized to satisfy the active and reactive current (power) requirements defined in the grid codes, and at the same time mitigates the current distortions even with unsymmetrical grid fault. During grid faults, th ...
... torsional oscillations caused by drive-train characteristics. The grid-side control is utilized to satisfy the active and reactive current (power) requirements defined in the grid codes, and at the same time mitigates the current distortions even with unsymmetrical grid fault. During grid faults, th ...
electronic components - Crompton Instruments
... transistor is primarily used as an current amplifier. When a small current signal is applied to the base terminal, it is amplified in the collector circuit. This current amplification is referred to as HFE or beta and equals Ic/Ib. As with all semiconductors, breakdown voltage is a design limitation ...
... transistor is primarily used as an current amplifier. When a small current signal is applied to the base terminal, it is amplified in the collector circuit. This current amplification is referred to as HFE or beta and equals Ic/Ib. As with all semiconductors, breakdown voltage is a design limitation ...
FAN3268 2A Low-Voltage PMOS-NMOS Bridge Driver FAN3268 —2A Low-Voltage PMOS-NMOS Bridge Driver Features
... Theta_JA (ΘJA): Thermal resistance between junction and ambient, dependent on the PCB design, heat sinking, and airflow. The value given is for natural convection with no heatsink using a 2S2P board, as specified in JEDEC standards JESD51-2, JESD51-5, and JESD51-7, as appropriate. Psi_JB (ΨJB): Ther ...
... Theta_JA (ΘJA): Thermal resistance between junction and ambient, dependent on the PCB design, heat sinking, and airflow. The value given is for natural convection with no heatsink using a 2S2P board, as specified in JEDEC standards JESD51-2, JESD51-5, and JESD51-7, as appropriate. Psi_JB (ΨJB): Ther ...
MAX5302 Low-Power, 12-Bit Voltage-Output DAC with Serial Interface __________________General Description
... bits (C2, C1, C0), followed by the 12+1 data bits D11...D0, S0 (Figure 4). Set the sub-bit (S0) to zero. The 3-bit control code determines the register to be updated and the configuration when exiting shutdown. Figures 5 and 6 show the serial-interface timing requirements. The chip-select (CS) pin m ...
... bits (C2, C1, C0), followed by the 12+1 data bits D11...D0, S0 (Figure 4). Set the sub-bit (S0) to zero. The 3-bit control code determines the register to be updated and the configuration when exiting shutdown. Figures 5 and 6 show the serial-interface timing requirements. The chip-select (CS) pin m ...
MAX9248/MAX9250 27-Bit, 2.5MHz to 42MHz DC-Balanced LVDS Deserializers General Description
... The MAX9248/MAX9250 pair with the MAX9247 serializer to form a complete digital video transmission system. For operating frequencies less than 35MHz, the MAX9248/ MAX9250 can also pair with the MAX9217 serializer. The MAX9248 features spread-spectrum capability, allowing output data and clock to spr ...
... The MAX9248/MAX9250 pair with the MAX9247 serializer to form a complete digital video transmission system. For operating frequencies less than 35MHz, the MAX9248/ MAX9250 can also pair with the MAX9217 serializer. The MAX9248 features spread-spectrum capability, allowing output data and clock to spr ...
ELE 427 Homework #1 Fall `07
... 5. Consider two systems for measuring angular position. The first is a 1,000-line optical encoder with a single decoding counter, and the second is a 1K potentiometer connected to a voltmeter that displays to the nearest millivolt. For this problem, you may assume that the potentiometer does not hav ...
... 5. Consider two systems for measuring angular position. The first is a 1,000-line optical encoder with a single decoding counter, and the second is a 1K potentiometer connected to a voltmeter that displays to the nearest millivolt. For this problem, you may assume that the potentiometer does not hav ...
General Description Benefits and Features
... applies typically to an output voltage less than 1.8V, so zero frequency from the ESR is needed to increase the phase margin at the crossover frequency. The recommended relationship between ESR and total output capacitance values are shown in Table 1. When a low-ESR type capacitor is used with a cer ...
... applies typically to an output voltage less than 1.8V, so zero frequency from the ESR is needed to increase the phase margin at the crossover frequency. The recommended relationship between ESR and total output capacitance values are shown in Table 1. When a low-ESR type capacitor is used with a cer ...
Bluetooth Enabled Coffee Machine
... degrees of total movement • Servo’s run on proportional control – this means the motors speed proportional to the difference in the servo’s position from its desired position. So it will move at a slower rate if it is closer to the desired position. This is a very efficient model. • There are two ty ...
... degrees of total movement • Servo’s run on proportional control – this means the motors speed proportional to the difference in the servo’s position from its desired position. So it will move at a slower rate if it is closer to the desired position. This is a very efficient model. • There are two ty ...
Lecture 16
... – Cannot distribute power on the board simply by using the printed circuit wires and connecting them to the power/ground pins of the chip directly. – Off chip power distribution must employ methods that reduce the effects of line and pin inductance. To insure reliable circuit operation: dI L = VDD d ...
... – Cannot distribute power on the board simply by using the printed circuit wires and connecting them to the power/ground pins of the chip directly. – Off chip power distribution must employ methods that reduce the effects of line and pin inductance. To insure reliable circuit operation: dI L = VDD d ...
General Signal Conditioning Guide
... C3 = input capacitance of the voltage amplifier or readout instrument in pF According to the law of electrostatics (Equations 1 and 2), sensing elements with a low capacitance will have a high voltage sensitivity. This explains why low-capacitance quartz sensors are used predominantly in voltage sys ...
... C3 = input capacitance of the voltage amplifier or readout instrument in pF According to the law of electrostatics (Equations 1 and 2), sensing elements with a low capacitance will have a high voltage sensitivity. This explains why low-capacitance quartz sensors are used predominantly in voltage sys ...
oscillator - Vidyarthiplus
... The different types of feedback are: 1. Positive feedback, 2. Negative feedback. 3) Draw the block diagram of a feedback system. 4) (a) What is meant by positive feedback? (Or) Define direct feedback. (Or) Define Regenerative feedback. If feedback signal applied is in phase with the input signal and ...
... The different types of feedback are: 1. Positive feedback, 2. Negative feedback. 3) Draw the block diagram of a feedback system. 4) (a) What is meant by positive feedback? (Or) Define direct feedback. (Or) Define Regenerative feedback. If feedback signal applied is in phase with the input signal and ...
Ultra Low Power VLSI Design: A Review
... potential across the source & drain) even if the gate voltage is in the off position. This current is called sub threshold current and used to be insignificant. However, as devices have become smaller and smaller and operating voltages have not scaled down with technology scaling (due to problems sc ...
... potential across the source & drain) even if the gate voltage is in the off position. This current is called sub threshold current and used to be insignificant. However, as devices have become smaller and smaller and operating voltages have not scaled down with technology scaling (due to problems sc ...
TL97x Output Rail-To-Rail Very-Low-Noise
... The output voltage of an operational amplifier is limited by its internal circuitry to some level below the supply rails. For this amplifier, the output voltage must be within ±12 V. 9.1.2.2 Supply and Input Voltage For correct operation of the amplifier, neither input must be higher than the recomm ...
... The output voltage of an operational amplifier is limited by its internal circuitry to some level below the supply rails. For this amplifier, the output voltage must be within ±12 V. 9.1.2.2 Supply and Input Voltage For correct operation of the amplifier, neither input must be higher than the recomm ...
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.