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AD2S100 датащи(PDF) 1 Page - Analog Devices |
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AD2S100 датащи(HTML) 1 Page - Analog Devices |
1 / 12 page One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD2S100 FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The AD2S100 performs the vector rotation of three-phase 120 degree or two-phase 90 degree sine and cosine signals by trans- ferring these inputs into a new reference frame which is controlled by the digital input angle φ. Two transforms are included in the AD2S100. The first is the Clarke transform which computes the sine and cosine orthogonal components of a three-phase input. These signals represent real and imaginary components which then form the input to the Park transform. The Park transform relates the angle of the input signals to a reference frame controlled by the digital input port. The digital input port is a 12-bit parallel binary representation. If the input signals are represented by Vds and Vqs, respectively, where Vds and Vqs are the real and imaginary components, then the transformation can be described as follows: Vds' = Vds Cos φ – Vqs Sinφ Vqs' = Vds Sin φ + Vqs Cosφ Where Vds' and Vqs' are the output of the Park transform and Sin φ, and Cosφ are the values internally derived by the AD2S100 from the binary digital data. The input section of the device can be configured to accept either three-phase inputs, two-phase inputs of a three-phase system, or two 90 degree input signals. The homopolar output detects the imbalance of a three-phase input only. Under nor- mal conditions, this output will be zero. The digital input section will accept a resolution of up to 12 bits (AD2S100). An input data strobe signal is required to synchro- nize the position data and load this information into the device counters. A busy output is provided to identify the conversion status of the AD2S100. The busy period represents the conver- sion time of the vector rotation. Two analog output formats are available. A two-phase rotated output facilitates multiple rotation blocks. Three phase format signals are available for use with a PWM inverter. PRODUCT HIGHLIGHTS Hardware Peripheral for Standard Microcontrollers and DSP Systems The AD2S100 removes the time consuming cartesian transfor- mations from digital processors and benchmarks a speed im- provement of 30:1 on standard 20 MHz processors. AD2S100 transformation time = 2 µs (typ). Field Oriented Control of AC and DC Brushless Motors The AD2S100 accommodates all the necessary functions to provide a hardware solution for ac vector control of induction motors and dc brushless motors. Three-Phase Imbalance Detection The AD2S100 can be used to sense overcurrent situations or imbalances in a three-phase system via the homopolar output. Resolver-to-Digital Converter Interface The AD2S100 provides general purpose interface for position sensors used in the application of dc brushless and ac induction motor control. Ia Ib Ic Vds Vqs SECTOR MULTIPLIER SINE AND COSINE MULTIPLIER INPUT DATA STROBE HOMOPOLAR OUTPUT HOMOPOLAR REFERENCE +5V GND –5V φ POSITION PARALLEL DATA 12 BITS Cos ( θ + 120° + φ ) Cos ( θ + 240° + φ) Va Vb Vc 30-20 Sin θ Cos θ Cos θ Sin θ Cos θ + φ CONV1 CONV2 DECODE BUSY Vds' Vqs' Sin θ + φ SECTOR MULTIPLIER SINE AND COSINE MULTIPLIER Ia + Ib + Ic 3 2 φ-3φ Cos ( θ + 120°) Cos ( θ + 240°) AC Vector Processor FEATURES Complete Vector Coordinate Transformation on Silicon Mixed Signal Data Acquisition Three-Phase 120 and Orthogonal 90 Signal Transformation Three-Phase Balance Diagnostic–Homopolar Output APPLICATIONS AC Induction and DC Permanent Magnet Motor Control HVAC, Pump, Fan Control Material Handling Robotics Spindle Drives Gyroscopes Dryers Washing Machines Electric Cars Actuator Three-Phase Power Measurement Digital-to-Resolver & Synchro Conversion |
Аналогичный номер детали - AD2S100_15 |
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Аналогичное описание - AD2S100_15 |
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