Measuring the Exact Length of a Rubidium Atomic Vapor Cell
... Tuning the temperature generally gives widest range, as diode lasers will continue operating at about a 60K range centered on room temperature, down to 0° C (and beyond) and up to around 55° C; the (approximately linear) slope is about ⅓ nm/°C, with wavelength decreasing as temperature does. Howeve ...
... Tuning the temperature generally gives widest range, as diode lasers will continue operating at about a 60K range centered on room temperature, down to 0° C (and beyond) and up to around 55° C; the (approximately linear) slope is about ⅓ nm/°C, with wavelength decreasing as temperature does. Howeve ...
OKL2-T/20-W12 Series
... Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. ...
... Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. ...
Chapter 4: Introduction to DC Machine
... instead of AC current, a device must be used to change the AC voltage produced in the armature windings into DC voltage. This job is performed by the commutator. The commutator is constructed from a copper ring split into segments with insulating material between the segments (See next page). Brushe ...
... instead of AC current, a device must be used to change the AC voltage produced in the armature windings into DC voltage. This job is performed by the commutator. The commutator is constructed from a copper ring split into segments with insulating material between the segments (See next page). Brushe ...
AMPROBE_Beha-Amprobe catalog 2014
... Two of the most famous brands in the US and Germany have now joined forces to become an even stronger brand and are committed to provide the best quality tools and support for the customer. Beha-Amprobe offers wide range of cost-effective, innovative test equipment specifically designed to make the ...
... Two of the most famous brands in the US and Germany have now joined forces to become an even stronger brand and are committed to provide the best quality tools and support for the customer. Beha-Amprobe offers wide range of cost-effective, innovative test equipment specifically designed to make the ...
RHRP8120 8 A, 1200 V, Hyperfast Diode Features
... Peak Repetitive Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VRRM Working Peak Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VRWM DC Blocking Voltage . . . . . . . . . . . . . . ...
... Peak Repetitive Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VRRM Working Peak Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VRWM DC Blocking Voltage . . . . . . . . . . . . . . ...
Document
... 15. What are the reasons for variation of voltage due to increase of load in the system 16. Most of the Power transformers are of Y connected, why not ∆ connected 17. We know that Voltage is directly proportional to frequency, but sometimes voltage decreases but not the frequencies why? 18. In case ...
... 15. What are the reasons for variation of voltage due to increase of load in the system 16. Most of the Power transformers are of Y connected, why not ∆ connected 17. We know that Voltage is directly proportional to frequency, but sometimes voltage decreases but not the frequencies why? 18. In case ...
DC Machine - Portal UniMAP
... instead of AC current, a device must be used to change the AC voltage produced in the armature windings into DC voltage. This job is performed by the commutator. The commutator is constructed from a copper ring split into segments with insulating material between the segments (See next page). Brushe ...
... instead of AC current, a device must be used to change the AC voltage produced in the armature windings into DC voltage. This job is performed by the commutator. The commutator is constructed from a copper ring split into segments with insulating material between the segments (See next page). Brushe ...
PDF: 1.21MB
... The maximum supply voltage for IGBT turning off safely in case of an SC fault. The power chip might be damaged if supply voltage exceeds this rating. (7) Tc position Tc (case temperature) is defined as the temperature just underneath the specified power chip. Please mount a thermocouple on the heat ...
... The maximum supply voltage for IGBT turning off safely in case of an SC fault. The power chip might be damaged if supply voltage exceeds this rating. (7) Tc position Tc (case temperature) is defined as the temperature just underneath the specified power chip. Please mount a thermocouple on the heat ...
1.1 Short Questions
... Electric current is flowing in a metallic conductor when the conductor is heated up; cold water is poured over half the conductor. What could be the effect on the temperature of the other half of the conductor? Emf is not always grater than terminal p.d, justified.(HSEB2058) Is it possible that ther ...
... Electric current is flowing in a metallic conductor when the conductor is heated up; cold water is poured over half the conductor. What could be the effect on the temperature of the other half of the conductor? Emf is not always grater than terminal p.d, justified.(HSEB2058) Is it possible that ther ...
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.