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11451 to 11500 of 13417 results  Page: << Previous 50 Results 220 221 222 223 224 225 226 227 228 229 [230] 231 232 233 234 235 236 237 238 239 240 >> Next 50 Results
Freight Forwarding Services (47 suppliers)
Freight Handling Systems (3 suppliers)
Freight Lifts (7 suppliers)
Freight Management (16 suppliers)
Freight Movement (7 suppliers)
Freight Saver Lockstep Ladders (1 supplier)
Freight Saver Spring Tilt and Roll Ladders (2 suppliers)
Freight Services (19 suppliers)
Freight Warehousing Services (16 suppliers)
Freight Weigh Systems (2 suppliers)
French Castle Stone (1 supplier)
French Drain Repair (2 suppliers)
French Drain Systems (9 suppliers)
French Oil Rubber Presses (1 supplier)
French Rail Patio Doors (9 suppliers)
French Sliders (1 supplier)
French Style Jacket Gaskets (1 supplier)
French Vinyl Patio Doors (2 suppliers)
Freon Compressors (2 suppliers)
Freon Gas Filters (1 supplier)
Freon Gas Sensors (1 supplier)
Frequency & Pulse Conditioners (1 supplier)
Frequency Agile Waveform Generator (1 supplier)
Frequency Analyzers (8 suppliers)
Frequency Blind Mate Connectors (1 supplier)
Frequency Calibrators (1 supplier)
Frequency Changers (5 suppliers)
Frequency Channels (1 supplier)
Frequency Conditioners (1 supplier)
Frequency Control Devices (23 suppliers)
Frequency Control Instruments (6 suppliers)
Frequency Control Relays (2 suppliers)
Frequency Control Rotary Screw Air Compressors (1 supplier)
Frequency Controlled Distribution Amplifier (1 supplier)
Frequency Controlled Geared Motors (1 supplier)
Frequency Controlled Motor Starter (1 supplier)
Frequency Converter for AC Compressor Units (2 suppliers)
Frequency Converters (106 suppliers)
Frequency changer or frequency converter is an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency. These devices are built out of electromechanical components such as motor-generator sets or rotary converters. They usually consist of a rectifier stage, which is then inverted to produce AC of the desired frequency. The inverter may use thyristors or IGBTs. A battery is also added to the DC circuitry to improve the converter's ride-through of brief outages in the input power. Frequency changers vary in power-handling capability from a few watts to megawatts. They are used to control the speed and torque of the AC motors. In this application, the most typical frequency converter topology is the three-phase two-level voltage source inverter. The phase voltages are controlled using the power semiconductor switches and pulse width modulation (PWM). These converters are typically used to control the speed of pumps and fans. Frequency converter also refers to a much-lower-powered circuit that converts radio frequency signals at one frequency to another frequency. The circuit usually consists of a local oscillator and frequency mixer.
Frequency Counter Instrument Driver (1 supplier)
Frequency Counter Test Equipment (2 suppliers)
Frequency Counters (21 suppliers)
Frequency counter is a measuring instrument which measures frequency range, sensitivity and resolution. The present-day frequency counters are usually of the multi-function type and they can perform the following measurements: frequency, period, ratio of frequencies, totalizing, scaling and time interval. In addition, frequency counters can also be designed to be compatible with the IEEE or IEC interface bus, to enable their operation in automated test and measurement systems. Frequency measurement is performed by totalizing the number of input cycles for a precisely known time period, so that the resulting total count is proportional to the unknown input frequency. The logic circuits internal to the counter position the decimal point automatically or under manual control, so that the display is directly the input frequency. The time reference is usually derived from a precision, high-stability quartz crystal oscillator internal to the counter. Using this basic technique and the ICs available now, it is possible to carry out frequency measurement up to 1000 MHz.
Frequency Discriminators (4 suppliers)
Frequency Dividers (4 suppliers)
Frequency Doubler Systems (1 supplier)
Frequency Drive Pressurization Units (2 suppliers)
Frequency Dry Type Transformers (1 supplier)
Frequency Filter Inductors (1 supplier)
Frequency Hopping Multiplexer (1 supplier)
Frequency Input Alarm Trips (1 supplier)
Frequency Input Discrete Controller Transmitter (1 supplier)
11451 to 11500 of 13417 results  Page: << Previous 50 Results 220 221 222 223 224 225 226 227 228 229 [230] 231 232 233 234 235 236 237 238 239 240 >> Next 50 Results
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