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#Fpga synchro resolver update#
#Fpga synchro resolver full#
#Fpga synchro resolver software#
#Fpga synchro resolver series#
#Fpga synchro resolver simulator#

One 0.001° Synchro/Resolver Measurement and one 0.

Product will be available in limited quantities and may be ordered until December 11th, 2020. An End of Life Letter can be found, below under the Documents Tab. As a result, we have found it necessary to categorize these cards as End of Life. Over the past several years, NAI has worked hard to manage component issues, but has now encountered multiple component obsolescence issues which cannot be managed long term.

#Fpga synchro resolver series#

Typical applications include synchro or resolver alignment, gyro testing, fire control system testing, and servo system alignment.Īugust 2020: North Atlantic Industries has been manufacturing the 5388 Series Synchro/ Resolver VXI Card for 25+ years.

#Fpga synchro resolver simulator#

The desired reference signal carrier frequency is 1250 times lower (8 kHz).The 5388 is a multifunctional instrument that combines a Synchro/Resolver Simulator and Angle Position Indicator on a single C-size VXI card. Synchro and Resolver Engineering Handbook Contents Page Section 1.0 Introduction 1-1 Section 2.0 Synchros and Resolvers 2-1 2.1 Theory of Operation and Classic Applications 2-1 2.1.1 Transmitter 2-1 2.1.2 Receiver 2-1 2.1.3 Differential 2-2 2.1.4 Control Transformer 2-2 2.1.5 Transolver and Differential Resolver 2-3 2.1.

#Fpga synchro resolver update#

This bit-stream is generated inside of an FPGA with an update rate of 10 MHz. A mechanical input such as a shaft Synchros & Resolvers Read. In function, the synchro is an electromechanical transducer. 6: Simple 12 bit ΔΣ digital-to-analog converter Synchros As a circuit element, the synchro is essentially a variable-coupling transformer the magnitude of the magnetic coupling between the primary and secondary, and hence the magnitude of the output voltage, varies according to the position of the rotatable element. The modulator generates from the 12 bit low sample rate input data an over sampled 1 bit wide bit-stream.įig. Fig. 6 shows a block diagram of a digital to analog modulator using simple digital circuits. Generating an ideal sine reference signal with a ΔΣ modulator does not need many resources. Frequency dependent damping and phase lag will not vary within the production.

#Fpga synchro resolver full#

Digital filters offer full repeatability. The new ΔΣ tracking RDC concept is moving as much as possible into the digital domain.

reference signal phase lag due to the analog filters.

sin/cos system gain mismatch compensation.

no phase lag due to the Luenberger observer.

low additional PCB-space (analog signal conditioning).

low additional cost due to available sampling ADC channels and CPU resources.

#Fpga synchro resolver software#

The advantages of a sampling ADC / software RDC with a Luenberger observer are: The noise can be reduced by lowering the tracking loop bandwidth (= filtering) which reduces also the distortion responsiveness of the servo loop. The resolution limitations are resulting in high bandwidth systems with well audible noise.

precision of the digital signal processing.

The resolution depends only on the resolver-to-digital conversion: Getting more than 8 arc minutes (~ 11.5 bit) accuracy from a Resolver is not the standard. The accuracy depends mainly on the specified Resolver performance. Ĭompared with a high resolution (sin/cos) encoder, this configuration has still two major limitations: The Kollmorgen Servostar product line is operating the Resolver with an 8 kHz carrier frequency. 2: Electrical representation of a resolver In servo drive applications this frequency is very often linked to the power stage switching frequency and the servo loop update rate.įig. Most Resolver data sheets are recommending a carrier frequency of 5 to 10 kHz. Regarding to long cables and the mechanical Resolver construction the carrier frequency is limited. To achieve low delay times with the conversion system a relatively high frequency is helpful. The carrier frequency f C is always a compromise. The transformation ratios are amplitude modulated by the sine and cosine of the angle of the rotor relative to the stator, θ.ĭue to the transformation principle an ac excitation or reference signal is necessary: An ac excitation signal applied to the primary (rotor, ref) is inductively coupled to the two secondary (stator, sin and cosine). An equivalent electrical representation and diagram of typical output signal formats are shown in fig. 2. The Resolver is an electromagnetic, rotational device that detects angular displacement. Also, most modern controllers derive velocity feedback from the position sensor. Resolvers are commonly used motor position sensing devices, fig. 1. High performance servo drives are still a fast growing market segment.