Signal-strength display to an FM
... Add a signal-strength display to an FM-receiver IC The Philips (www.semiconductors.philips.com) TDA7000 integrates a Tmonaural FM-radio receiver from the antenna connection to the audio out-put. External components include one tunable LC circuit for the local oscillator,a few capacitors,two resistor ...
... Add a signal-strength display to an FM-receiver IC The Philips (www.semiconductors.philips.com) TDA7000 integrates a Tmonaural FM-radio receiver from the antenna connection to the audio out-put. External components include one tunable LC circuit for the local oscillator,a few capacitors,two resistor ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
... are becoming more popular due to their advantages. A detailed survey of various PWM algorithms is given in [1]. Three-level voltage-fed PWM inverters are recently gaining popularity for multi-megawatt industrial drive applications [2]. In recent years, the space vector PWM (SVPWM) algorithm is attra ...
... are becoming more popular due to their advantages. A detailed survey of various PWM algorithms is given in [1]. Three-level voltage-fed PWM inverters are recently gaining popularity for multi-megawatt industrial drive applications [2]. In recent years, the space vector PWM (SVPWM) algorithm is attra ...
Evaluates: MAX1927/MAX1928 MAX1927/MAX1928 Evaluation Kit General Description Features
... assembled and tested surface-mount circuit board demonstrating the MAX1927/MAX1928 pulse-width modulated (PWM) step-down converters. The EV kit comes assembled with a MAX1928EUB18, which steps down a 2.6V to 5.5V input to a 1.8V output capable of sourcing 800mA. This EV kit can also be used to evalu ...
... assembled and tested surface-mount circuit board demonstrating the MAX1927/MAX1928 pulse-width modulated (PWM) step-down converters. The EV kit comes assembled with a MAX1928EUB18, which steps down a 2.6V to 5.5V input to a 1.8V output capable of sourcing 800mA. This EV kit can also be used to evalu ...
dU/dt output Filters for 3
... − max. lenght of motor cable: 40m − the power dissipation of the filter depends upon the switching frequency of the inverter, the lengh of the motor cable and the voltage. The given values refer to 20m cable and 4kHz switching frequency. For other conditions check the application range table and ...
... − max. lenght of motor cable: 40m − the power dissipation of the filter depends upon the switching frequency of the inverter, the lengh of the motor cable and the voltage. The given values refer to 20m cable and 4kHz switching frequency. For other conditions check the application range table and ...
95MET-2
... (b) Explain how the setting of an electrical overload protection device is determined? 4. Autotransformer starters or compensators are sometimes used with polyphase induction motors to _____________ ...
... (b) Explain how the setting of an electrical overload protection device is determined? 4. Autotransformer starters or compensators are sometimes used with polyphase induction motors to _____________ ...
Test Procedure for the NCP4894 Evaluation Board
... The NCP4894 requires a differential signal to drive the audio amplifier. This is done using a waveform generator with a differential output signal. Set a sinewave differential signal on the input connector (J2). The middle point is connected to ground while INM and INP signals are in opposite phases ...
... The NCP4894 requires a differential signal to drive the audio amplifier. This is done using a waveform generator with a differential output signal. Set a sinewave differential signal on the input connector (J2). The middle point is connected to ground while INM and INP signals are in opposite phases ...
SG2525A SG3525A
... Holding Pin 10 high for a longer duration, however, will ultimately discharge this external capacitor, recycling slow turn-on upon release. Pin 10 should not be left floating as noise pickup could conceivably interrupt normal operation. ...
... Holding Pin 10 high for a longer duration, however, will ultimately discharge this external capacitor, recycling slow turn-on upon release. Pin 10 should not be left floating as noise pickup could conceivably interrupt normal operation. ...
Analog Modulation
... 4.10 Analog Modulation Analog modulation is a signal changing in level and frequency on a continual basis. This occurs when a microphone or telephone is used with sound waves being converted into electrical signals. ...
... 4.10 Analog Modulation Analog modulation is a signal changing in level and frequency on a continual basis. This occurs when a microphone or telephone is used with sound waves being converted into electrical signals. ...
Theorie examen GEA januari 2016 Prof Melkebeek
... CSI with SM (smooth rotor): Derive an equivalent scheme. Draw the phasor diagram and derive the characteristics. Draw an reduced scheme using the characteristics. How is the control of the angle done practically? (gamma influences I_m). Extra: Draw the torquespeed characteristic. (linear). Dis ...
... CSI with SM (smooth rotor): Derive an equivalent scheme. Draw the phasor diagram and derive the characteristics. Draw an reduced scheme using the characteristics. How is the control of the angle done practically? (gamma influences I_m). Extra: Draw the torquespeed characteristic. (linear). Dis ...
Advance Matlab - Ascent Softech
... In Electrical circuit, show the voltages across, the currents through and the power absorbed or delivered by each device.Input and Output waveforms of op-amp based circuit.Show voltages in RLC circuit. ...
... In Electrical circuit, show the voltages across, the currents through and the power absorbed or delivered by each device.Input and Output waveforms of op-amp based circuit.Show voltages in RLC circuit. ...
Pulse Width Modulation (PWM)
... of a PWM motor signal should be 20 kHz or more to ensure that the motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armatur ...
... of a PWM motor signal should be 20 kHz or more to ensure that the motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armatur ...
FOUR-QUADRANT CHOPPER DRIVE
... Moreover, the system is provided with Soft start facility i.e., starting the motor without allowing the armature current to exceed the full load current. The Hardware of this system includes uncontrolled rectifier using diodes, chopper using IGBT’S, control keys, speed adjust potentiometer and other ...
... Moreover, the system is provided with Soft start facility i.e., starting the motor without allowing the armature current to exceed the full load current. The Hardware of this system includes uncontrolled rectifier using diodes, chopper using IGBT’S, control keys, speed adjust potentiometer and other ...
DC-DC Converter for Charging Electric Vehicle
... Industry Requirements ◦ Standardized receptacles and battery/circuitry layout ...
... Industry Requirements ◦ Standardized receptacles and battery/circuitry layout ...
ELEC 5705 RF Systems Design: Assignment #3
... The points in the file are spaced by 1e-9seconds. Thus a time variable corresponding to this file can be constructed by the commands: ...
... The points in the file are spaced by 1e-9seconds. Thus a time variable corresponding to this file can be constructed by the commands: ...
Week22_revised_Motor_Control_PWM
... of a PWM motor signal should be 20 kHz or more to ensure that the motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armatur ...
... of a PWM motor signal should be 20 kHz or more to ensure that the motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armatur ...
BDTIC www.BDTIC.com/infineon Frequency modulation techniques 2011 February
... The frequency is pulled (between FSK_low and FSK_high) values due to this additional (switched ) capacitor ...
... The frequency is pulled (between FSK_low and FSK_high) values due to this additional (switched ) capacitor ...
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.