P83566
... If this appliance is required to produce a distinctive three-pulse Temporal Pattern Fire Alarm Evacuation Signal (for total evacuation) in accordance with NFPA 72, the appliance must be used with a fire alarm control unit that can generate the temporal pattern signal. Refer to manufacturer’s install ...
... If this appliance is required to produce a distinctive three-pulse Temporal Pattern Fire Alarm Evacuation Signal (for total evacuation) in accordance with NFPA 72, the appliance must be used with a fire alarm control unit that can generate the temporal pattern signal. Refer to manufacturer’s install ...
Designing a Three Phase Inverter for a Permanent Magnet Synchronous Motor
... devices a central control unit is used which runs a self developed software. This controller is also called main control unit (MCU). The separate electrical systems in the car communicate by using a CAN bus. The CAN bus was specifically created to guarantee stable communication in automotive environ ...
... devices a central control unit is used which runs a self developed software. This controller is also called main control unit (MCU). The separate electrical systems in the car communicate by using a CAN bus. The CAN bus was specifically created to guarantee stable communication in automotive environ ...
Temperature coefficient of resistance basics
... Temperature coefficient of resistance basics The reason behind the temperature coefficient of resistance within a conductor can be reasoned intuitively. The resistance of a material has a dependence upon a number of phenomena. One of these is the number of collisions that occur between the charge ca ...
... Temperature coefficient of resistance basics The reason behind the temperature coefficient of resistance within a conductor can be reasoned intuitively. The resistance of a material has a dependence upon a number of phenomena. One of these is the number of collisions that occur between the charge ca ...
A Reconfigurable Low-Noise Dynamic Comparator with Offset
... CMOS process with 1.2V supply and the chip photo is shown in Fig 8. The area of clock generator and calibration logic, and comparator are 970μm2 and 360μm2, respectively. In the testing bench, the measurement of the input noise sigma was obtained by counting the bit error rate of the comparator outp ...
... CMOS process with 1.2V supply and the chip photo is shown in Fig 8. The area of clock generator and calibration logic, and comparator are 970μm2 and 360μm2, respectively. In the testing bench, the measurement of the input noise sigma was obtained by counting the bit error rate of the comparator outp ...
SQUIDs- Superconducting Quantum Interference Devices
... of the voltage modulation and sets the external flux at (2n + 1)Φ0 /4 (n = 0, 1, 2, ...), so that the flux-to-voltage transfer coefficient |∂V /∂Φ| is maximizes, which we denote as VΦ . In this way the SQUID will produce a maximum output voltage signal δV = VΦ δΦ in response to a small flux signal δ ...
... of the voltage modulation and sets the external flux at (2n + 1)Φ0 /4 (n = 0, 1, 2, ...), so that the flux-to-voltage transfer coefficient |∂V /∂Φ| is maximizes, which we denote as VΦ . In this way the SQUID will produce a maximum output voltage signal δV = VΦ δΦ in response to a small flux signal δ ...
AN EFFICIENT BRAKING ALGORITHM FOR INTERIOR
... number of rotor pole pairs, ωe = pωr is rotor electrical speed and Te is electromagnetic torque. Power generated during braking can be defined with ...
... number of rotor pole pairs, ωe = pωr is rotor electrical speed and Te is electromagnetic torque. Power generated during braking can be defined with ...
Unit G482 - Electrons, waves and photons
... change as the temperature of the thermistor increases to 80 °C. ...
... change as the temperature of the thermistor increases to 80 °C. ...
Create smarter, more effi cient white goods An industry-leading portfolio of cost-effective,
... For white goods, we take a family approach, offering the widest selection of ARM7 and ARM9 microcontrollers. That means you’ll always find the right core, the right memory size, and the right mix of peripherals for your application. The LPC family provides an added level of flexibility, too, since yo ...
... For white goods, we take a family approach, offering the widest selection of ARM7 and ARM9 microcontrollers. That means you’ll always find the right core, the right memory size, and the right mix of peripherals for your application. The LPC family provides an added level of flexibility, too, since yo ...
A novel direct torque control (DTC) method
... has been developed. The torque and flux references are Tm*=0.2 N.m, and λs*0.06wb. The sampling period is fixed at 50 µs. The parameters of the simulated motor are given in table 3. Figs. 5 and 6 show simulation results for SPIM-60-1n and SPIM-60-2n respectively. The figures depict, the quadratur ...
... has been developed. The torque and flux references are Tm*=0.2 N.m, and λs*0.06wb. The sampling period is fixed at 50 µs. The parameters of the simulated motor are given in table 3. Figs. 5 and 6 show simulation results for SPIM-60-1n and SPIM-60-2n respectively. The figures depict, the quadratur ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.