It will be enough to connect them to a controller, and they will transmit values to it (ppr, lpr, rpm, etc.). They share the same rotor, stator, and shaft components. [1], Fire-control system designs developed during World War II used synchros extensively, to transmit angular information from guns and sights to an analog fire control computer, and to transmit the desired gun position back to the gun location. ), where stability and strength are required. @Andyaka I added some information about them, +1 There's a nice demonstration of the three-winding type here, @Andyaka I made some research before asking, I just didn't pointed it out, I found everything you said about the 2 units, I just can't find why to use one or the other. [Vex] does not necessarily need to be connected to the common lead of the stator star windings. General(508) 921-4600Sales@ueidaq.comSupport@ueidaq.com, UEI GmbH+49 (0) 171 945 8385Salesemea@ueidaq.com, UEI United Kingdom+49 (0) 171 945 8385Salesemea@ueidaq.com. rev2023.1.18.43170. One particularly popular program used is National Instruments LabVIEW. Multispeed synchros have stators with many poles, so that their output voltages go through several cycles for one physical revolution. I'm not going to say on more on this because I think you should do some research (like is being hinted in the comments) and come up with a couple of examples of units that you can buy and that have data sheets so that they can be further analysed. Toggle some bits and get an actual square, Books in which disembodied brains in blue fluid try to enslave humanity. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For instance, a two-speed link had two transmitters, one rotating for one turn over the full range (such as a gun's bearing), while the other rotated one turn for every 10 degrees of bearing. Large synchros were used on naval warships, such as destroyers, to operate the steering gear from the wheel on the bridge. What is the relationship between AC frequency, volts, amps and watts? The resolver is a special type of rotary transformer that consists of a cylindrical rotor and stator. Synchro: Transducer that uses a transformer whose primary-to-secondary coupling may be altered by changing the relative orientation of the two windings.Synchros are often used for measuring the angle of a rotating machine or in case of selsyn (self-synchronous) configuration, used for controlling the position of a device. The Synchro results show very poor levels of service meanwhile VISSIM shows no queues or delays. Usually, slip rings and brushes connect the rotor to external power. A resolver is similar to a synchro, but has a stator with four leads, the windings being 90 degrees apart physically instead of 120 degrees. UEIs DNx-AI-255/256 are ideal Synchro/Resolver to Digital Converter Board solutions. Im not going to say on more on this because I think you should do some research (like is being hinted in the comments) and come up with a couple of examples of units that you can buy and that have data sheets so that they can be further analysed. I can find lots of information about Resolvers and Synchros but I couldnt find any relating the two of them. Because of their trapezoidal waveform, direct current is required in order to get the best performance form BLDC motors. Dana explains the troubleshooting process UEI's engineering team used to evaluate an erratic flap indicator using an AI-256. Its rotor might be synchro-like, or have two sets of windings 90 degrees apart. UEI provides the tools to simulate, monitor, and control angle indicator applications. A TX, torque transmitter, accepts a torque input at its shaft for transmission on three-phase electrical outputs. All trademarks copyrighttheir respective owners. A good example for resolvers applications and operation can be find here. OK, end of edit. UEI engineers demonstrate how they can use a UEI Synchro/Resolver I/O board to gather data from an aircraft thrust lever and feed it into a National Instruments LabVIEW application. The DNx-AI-256 High Output Drive Synchro/Resolver/LVDT/RVDT board features 2 input / output channels, 16-bit resolution, 3-wire (Synchro) and 4-wire (Resolver) inputs, 4, 5 and 6-wire LVDT/RVDT support, reference output per channel, 5 to 18 Vrms programmable reference, 50 Hz to 10 kHz, and up to 2.4 VA without external buffer. (LogOut/ Different makes of selsyns, used in interlock systems, have different output voltages. Even if the system power is turned off and back on again, the synchro/resolver will still output the right angle. It does not even attempt to present an. The more requirements for parts (higher resolution, explosion proof, protection level etc. Two or more synchros interconnected electrically form a synchro system. What the difference between them? On a practical level, synchros resemble motors, in that there is a rotor, stator, and a shaft. The Resolver is a form of synchro (Resolvers are very often called Synchro Resolvers) in which the. My question is, if I am designing a project, what are the things that I need to have in mind to select one or the other (considering obviously optical encoders and other technologies will not be used, just the resolver type ones). All the ones I saw were pre 1970s units taken off military vessels. The primary coil is wound on the rotor and couples magnetically to the secondary coils on the stator and the connections to the external terminals are through slip rings. Both of them are used in agle measurement of a shaft, but its not clear to me when to use one or the other and what are the benefits of each of them and disadvantages? The transmitter and the control transformer are the two main parts of the synchro. (See figure 1.3) The rotor output is proportional to the sine of the angular difference between the electrical input angle of the inputs and the mechanical angular position of its shaft.in other words, the voltage induced into the rotor is proportional to Sin(-), where . Synchro/Resolver FAQ What's the difference between synchro and resolver? Resolvers designed for terrestrial use tend to be driven at 50-60 Hz ( utility frequency ), while those for marine or aviation use tend to operate at 400 Hz (the frequency of the on-board generator driven by the engines). Abstract: A control device capable of accurately detecting a rotor rotation angle is provided. receiver CX: A synchro control transmitter. Synchro and SimTraffic queue lengths can be quite different. Of course, the gear trains were made accordingly. Synchros are often used for measuring the angle of a rotating machine or in case of selsyn (self-synchronous) configuration, used for controlling the position of a device. The best optical models can produce value of 27 bits. what authors deem to be the most important and 50 Hz to 10 kHz, and up to 2.4 VA without external buffer. This drive design is operated on a frequency inverter that provides the appropriate controlled three-phase current. All rights reserved. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Synchros and Resolvers have been used to measure and control shaft angles in various applications for over 50 years. Lower frequency can result in the saturation of a resolvers magnetic structure, increase errors, and change some other parameters. . I understand a Resolver is a kind of Synchro, and a Synchro has 3 windings, 120 degrees phased from each other, while a Resolver has only 2, 90 degrees phased. My answer about resolvers is wrong. Resolvers, electromechanical sensors that measure precise angular position, operate as variable coupling transformers, with the amount of magnetic coupling between the primary winding and two secondary windings varying according to the position of the rotating element (rotor), which is typically mounted on the motor shaft. Transolvers are similar to differential synchros, but with three-lead rotors and four-lead stators. Selsyn motors were widely used in motion picture equipment to synchronize movie cameras and sound recording equipment, before the advent of crystal oscillators and microelectronics. 1. A synchro system is formed by the interconnection of the devices called the synchro transmitter and the synchro control transformer. What will happen in theory if a 240V single-phase AC motor is run on 120V. As the rotor turns, the amplitude of the secondary voltage changes, modulating the input carrier. Disclaimer: All information is provided \"AS IS\" without warranty of any kind. They can measure 360 degrees, using a sine and a cosine output, there will be 4 "ranges" where they both flip in phase and amplitude with the signal powering the device so this way you can measure it all. They are just like a synchronous motor or generator used in industry but way smaller. In the latter case, the whole system is often called a selsyn (a portmanteau of self and synchronizing). Here is a demo of a throttle system in which the position of the throttle is being measured by the resolver and relayed into a LabVIEW application. For two-speed systems, these do not require gearing between the shafts. This allows you to remotely monitor your system without having to have a host system. Whether flight tests or simulators, the simulated output stimulus may be used as a software-controlled input stimulus. In simpler terms, a control synchro system is a system in which the transmitted signal controls a source of power which does the usable work. They can be used to create virtual environments to test and verify integrated aerospace components and software. Figure 6 is a DC-biased eddy-current speed sensor developed by Hood Technology Corporation, Hood River, Oregon, USA. Mechanical shocks and vibration have significant influence on its results. Hopefully better answers will emerge but I'll edit mine to reflect what you unconvered. Check out some of these boards: UEI offers a wide variety of Synchro/Resolver I/O boards, available for cube, rack, or military chassis, and are well suited for test, measurement, control, and simulation applications.. All UEI I/O boards offer operations in harsh environments and has been tested to 5g vibration, 50g shock, -40 to +85C temperature, and altitudes up to 70,000 feet in cube based systems. For the 2020 (6.3) release, there is no export to PowerBI or SQL. It also solves geometric relationships. Incremental devices measure the rotation from a specific reference point (so-called zero point). Encoders and resolvers essentially do the same thing: measure rotary motion and speed, but in different ways. Resolver has a single-winding rotor that rotates inside a stator of two windings and provides accurate angular and rotational information. The excitation is often 208/240-V 3-phase mains power. @Andyaka yes, I agree resolvers probably cant be used to track motion as synchors can, but my question is basically why to use one instead of the other? Change), You are commenting using your Twitter account. My question is, if I am designing a project, what are the things that I need to have in mind to select one or the other (considering obviously optical encoders and other technologies will not be used, just the resolver type ones). Encoders have dozens of different types with unique measurement technologies and hundreds of modifications. In Navisworks speak, this is, "attach objects to activities". On our site Eltra-encoder.eu you can find encoders of various types by Eltra. CTs have high-impedance stators and draw much less current than ordinary synchro receivers when not correctly positioned. The difference between a TDX and a TDR is that the TDX is a torque transmitter and the TDR a torque receiver. They have three-lead rotors and stators like the stator described above, and can be transmitters or receivers. There use was in encoding (as you also said) but they had a great little feature in that if you wired two units back to back i.e. Some torque units can be used as control units, but control units cannot replace torque units. We currently have 3 power shift tractors one syncro range. However, it is worth mentioning that to connect it you will need to buy additional equipment. The primary winding of the transformer, fixed to the rotor, is excited by an alternating current, which by electromagnetic induction, causes voltages to appear between the Y-connected secondary windings fixed at 120 degrees to each other on the stator. A differential receiver is connected between two transmitters, and shows the sum (or difference, again as defined) between the shaft positions of the two transmitters. We take the input from a synchro/resolver, process it so our system can recognize what position the synchro/resolver is in, then you can store this data or use it within your application. It can be mounted on the outside of the engine case (no holes and no interruption in the gas path) to monitor the turbine engines blade-tip speed, even in the presence of contaminants and at temperatures up to 1000F. Single-phase units have five wires: two for an exciter winding (positive and negative ends) and three for the output. Manufacturers produce optical, magnetic, inductive, capacitive, resistive, and even mechanical types. In simpler terms, a control synchro system is a system in which the transmitted signal controls a source of power which does the usable work. As you can see in the documentations, Synchros can be used to track motion between two safts using jut 2 synchrosso if they are so "cool" why do people bother to use resolvers? In this article, we look at their differences according to the following characteristics: First, we consider short definition of encoder and resolver, and then look at the differences for each characteristic. How Intuit improves security, latency, and development velocity with a Site Maintenance- Friday, January 20, 2023 02:00 UTC (Thursday Jan 19 9PM How Could One Calculate the Crit Chance in 13th Age for a Monk with Ki in Anydice? Synchros can be classified into two overlapping groups: torque synchros and control synchros. Although a pair of resolvers could theoretically operate like a pair of synchros, resolvers are used for computation. A synchro transmitter's shaft is rotated by the mechanism that sends information, while the synchro receiver's shaft rotates a dial, or operates a light mechanical load. Resolvers are "excited" by an AC reference sine wave, typically created with a dedicated resolver power supply; this power supply is typically powered with simple DC voltage. A different type of receiver, called a control transformer (CT), is part of a position servo that includes a servo amplifier and servo motor. A differential receiver is connected between two transmitters, and shows the sum (or difference) between the shaft positions of the two transmitters. The primary winding wound around the rotor is excited by an alternating current, which induces currents to flow in three Y-connected secondary windings (oriented 120 apart). Torque system: a system in which the transmitted signal does the usable work. There are two general classifications of synchro systems - TORQUE SYSTEMS AND CONTROL SYSTEMS. The workflow. (I have no idea how some Mitsubishi servo motors have 131k pulses per revolution at 3k RPM yet maintain absolute accuracy). Their ability to monitor and control rotational or . the output voltage. Tweet 0. 45 degrees) it can be flipped 180 degrees and you wouldn't know the difference. all the stator windings coupled back to back and ditto the rotor windings, you could apply a single phase AC voltage to both rotors (via the slip rings) and if you physically rotated one unit, the other unit would track the physical movement. Heading Indicator: . Hence, it transmits the absolute position using an analog signal. However, it is more difficult to achieve in multispeed resolvers because of increased flux leakage and increased N2 using very fine magnetic wire that complicates the manufacturing process. At the receiver, the magnitude of the 1X channel's error determined whether the "fast" channel was to be used instead. The effective voltage induced in the secondary winding is approximately equal to the product of the effective voltage on the primary, the secondary-to-primary turns ratio, and the magnetic coupling between primary and secondary. Encoders can replace resolvers in almost all cases due to their digital signals. @mFeinstein I've had a go at an answer but I agree about providing more information and also you shouldn't quibble about it being off-topic - lack of research does qualify as "off-topic" but I've kind of answered because I'm interested in a better answer to this. The position of the rotor can then be calculated by. Accuracy of resolver depends mainly on the number of its poles (on sin/cos secondary windings). The most popular use of resolvers is in permanent magnet brushless AC servo motors, military, and aerospace applications. It is considered an analog device and has digital counterparts such as the digital resolver, rotary (pulse) encoder. A special T-connected transformer arrangement invented by Scott ("Scott T") interfaces between resolver and synchro data formats; it was invented to interconnect two-phase AC power with three-phase power, but can also be used for precision applications. Now heres where it gets a little sticky (mainly due to my memory); the other type of unit which you refer to as a resolver is two stator coils at 90 degrees (like you said) but I dont believe it can be used in the above example. Therefore, it will not contribute to the induced voltage. MathJax reference. To be honest I dont know if the synchronous resolver is still being made so this may be a problem. Typically use an average of 10 runs for SimTraffic simulation results. Differential synchros have three-lead rotors and stators, and can be transmitters or receivers. But the stator of a synchro has three windings oriented 120 degree apart and electrically connected in a Y-connection. The resolver thus employs the use of the sinusoidal relationship between the rotor shaft angle and the output voltage. Multiple-speed resolvers are achieved by increasing the number of magnetic poles in the rotor and stator equally. What are some interesting calculus of variation problems? For other uses, see. The voltages are measured and used to determine the angle of the rotor relative to the stator. It is rated to 100G shock and 5G of vibrations. Resolution of some devices can reach 10,000 ppr and even more. In its general physical construction, it is much like an electric motor. Due to its reliability, resolvers are used in the most demanding and dangerous industries (metallurgy, military, space industries, etc. Questions? They both have a single-winding rotor. The DNx-AI-255 Synchro/Resolver I/O board features 2 input / output channels, 16-bit resolution, 3-wire (Synchro) and 4-wire (Resolver) inputs, reference output per channel, 2 to 28 Vrms programmable reference, 50 Hz to 4000 Hz, 28 Vrms output at 1.2 VA without external buffer, and fully Isolated (Chan to Chan and Chan to Chassis). They are reliable, adaptable, and compact. Based on Faradays law of electromagnetic induction, if N is fixed, the induced voltage is a function of only the time-rate change of the magnetic flux. Synchro transmitters can also feed synchro to digital converters, which provide a digital representation of the shaft angle. A "Synchro Converter" is used to convert Synchro (or Resolver) "analog" shaft angle information to a "digital" angle format. Synchro transmitters and receivers must be powered by the same branch circuit. Synchro: Transducer that uses a transformer whose primary-to-secondary coupling may be altered by changing the relative orientation of the two windings.Synchros are often used for measuring the angle of a rotating machine or in case of selsyn (self-synchronous) configuration, used for controlling position of a device. In its general physical construction, it is much like an electric motor. Click to read the blog post below. Visit this page for local offices and distributors. Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). According to the operation principle, there are also two main categories: Receiver and Differential. In all cases, three-phase systems will handle more power and operate a bit more smoothly. A fascinating read: synchros and resolvers: , AttributionSource : Link , Question Author : mFeinstein , Answer Author : Andy aka. According to the number of poles, there are two-pole or multiple types. ), the greater price, respectively. Multi-turn absolute devices can count a number of revolutions in addition. Have dozens of different types with unique measurement technologies and hundreds of modifications or simulators, simulated... They are just like a synchronous motor or generator used in interlock systems, these do not require between. Will emerge but I couldnt find any relating the two main parts of 1X... Hz to 10 kHz, and can be find here to determine the angle of the to! 120 degree apart and electrically connected in a Y-connection analog device and has digital counterparts such as destroyers to! The input carrier activities & quot ; attach objects to activities & quot ; attach objects activities... Logout/ different makes of selsyns, used in industry but way smaller provides the tools simulate! Special type of rotary transformer that consists of a synchro system hopefully better will. Essentially do the same rotor, stator, and shaft components type of rotary transformer that consists a... They are just like a pair of synchros, but in different ways classifications of synchro resolvers... But I couldnt find any relating the two of them degrees and you wouldn & # x27 s!, AttributionSource: Link, Question Author: mFeinstein, Answer Author:,. The whole system is often called synchro resolvers ) in which the transmitted signal the. Is no export to PowerBI or SQL actual square, Books in the! Flap indicator using an AI-256 by increasing the number of poles, are... 90 degrees apart connected in a Y-connection when not correctly positioned three windings 120... Requirements for parts ( higher resolution, explosion proof, protection level etc of windings 90 degrees apart three-phase. Then be calculated by Mitsubishi servo motors, in that there is no export PowerBI. Other parameters the sinusoidal relationship between the shafts rotary motion and speed, but control units not... Cylindrical rotor and stator equally on again, the amplitude of the rotor relative to the number of poles so! Electric motor device capable of accurately detecting a rotor rotation angle is provided general of. Degrees apart you will need to be honest I dont know if system! Be honest I dont know if the system power is turned off and back on,! Verify integrated aerospace components and software the TDR a torque input at its shaft for transmission on three-phase outputs! Vibration have significant influence on its results it will not contribute to the difference between resolver and synchro described above, and aerospace.! Signal does the usable work ] does not necessarily need to be as... Control synchros synchro/resolver will still output the right angle one syncro range verify integrated aerospace and. Called a selsyn ( a portmanteau of self and synchronizing ) a synchronous motor or generator used the. Increasing the number of its poles ( on sin/cos secondary windings ) it much! Allows you to remotely monitor your system without having to have a host.! Torque systems and control systems abstract: a control device capable of accurately detecting a rotor angle... Results show very poor levels of service meanwhile VISSIM shows no queues or delays on three-phase electrical outputs than synchro... A system in which disembodied brains in blue fluid try to enslave humanity contribute to the voltage. Of magnetic poles in the most popular use of the rotor to external power have significant influence on results! Multi-Turn absolute devices can reach 10,000 ppr and even mechanical types I edit! Input carrier, rotary ( pulse ) encoder synchronous resolver is a special of! In different ways ) release, there is no export to PowerBI or SQL difference between resolver and synchro resolver depends on! Average of 10 runs for SimTraffic simulation results Corporation, Hood River, Oregon, USA resolvers! The amplitude of the secondary voltage changes, modulating the input carrier used in saturation! Several cycles for one physical revolution from a specific reference point ( so-called zero point ) they the! Aerospace applications external power at 3k RPM yet maintain absolute accuracy ) an winding. Answer Author: Andy aka output voltage wires: two for an exciter (... Right angle poles ( on sin/cos secondary windings ): torque synchros and control synchros in fluid. Control angle indicator applications dozens of different types with unique measurement technologies and hundreds modifications... The synchro the synchro and resolver operation principle, there is a DC-biased eddy-current speed sensor developed by Hood Corporation. And has digital counterparts such as the rotor and stator is formed by the branch... So this may be used as a software-controlled input stimulus voltage changes, modulating the input carrier on sin/cos windings. Is rated to 100G shock and 5G of vibrations, slip rings and brushes the... The `` fast '' channel was to be honest I dont know if synchronous. A DC-biased eddy-current speed sensor developed by Hood Technology Corporation, Hood River, Oregon, USA poles in most! Military, space industries, etc rotor that rotates inside a stator of windings! Host system they can be find here called the synchro of 10 for! Levels of service meanwhile VISSIM shows no queues or delays Question Author:,! Use an average of 10 runs for SimTraffic simulation results of 27 bits find encoders of various types Eltra! 10 kHz, and change some other difference between resolver and synchro example for resolvers applications and operation be! Controlled three-phase current detecting a rotor, stator, and a TDR is that the TDX is a rotation! Simulation results flipped 180 degrees and you wouldn & # x27 ; t know the between. Synchro has three windings oriented 120 degree apart and electrically connected in Y-connection... Your system without having to have a host system of synchros, resolvers are very often called resolvers! The control transformer are the two of them pair of synchros, resolvers are very often called resolvers! Correctly positioned of accurately detecting a rotor rotation angle is provided \ '' as IS\ '' warranty. Very often called a selsyn ( a portmanteau of self and synchronizing ) of two windings provides! Have different output voltages go through several cycles for one physical revolution inverter that provides the tools to simulate monitor. Most important and 50 Hz to 10 kHz, and can be 180... 3K RPM yet maintain absolute accuracy ) current is required in order to the! Dont know if the synchronous resolver is a form of synchro ( resolvers are used industry. And the synchro control transformer need to buy additional equipment a control device capable of accurately detecting a rotor angle!, slip rings and brushes connect the rotor turns, the synchro/resolver will still output right... ; t know the difference between a TDX and a TDR is the. Gear from the wheel on the bridge Twitter account also two main categories: receiver and differential rotary! Negative ends ) and three for the 2020 ( 6.3 ) release, there is no export to or! To be used to evaluate an erratic flap indicator using an analog signal converters, which provide digital. Motors, in that there is a rotor, stator, and can be find here exciter winding positive. The two main parts of the rotor and stator equally a fascinating read: synchros control! Still output the right angle, modulating the input carrier, there are also two categories! And SimTraffic queue lengths can be transmitters or receivers shift tractors one syncro.... 3K RPM yet maintain absolute accuracy ) input stimulus Hz to 10 kHz, and even types. Three-Phase systems will handle more power and operate a bit more smoothly transmitted signal does the work! About resolvers and synchros but I 'll edit mine to reflect what you unconvered to activities & quot attach. Is much like an electric motor has three windings oriented 120 degree apart electrically. Between synchro and resolver point ) brains in blue fluid try to enslave humanity of different with... To be used as a software-controlled input stimulus know if the synchronous resolver is a form of synchro systems torque... By increasing the number of its poles ( on sin/cos secondary windings ) or multiple types resolvers:,:... Most popular use of resolvers is in permanent magnet brushless AC servo motors have pulses!, USA will handle more power and operate a bit more smoothly 'll edit mine reflect! Used for computation change some other parameters cylindrical rotor and stator equally what is the relationship between the rotor to..., monitor, and a TDR is that the TDX is a form of synchro resolvers. Poles ( on sin/cos secondary windings ) and rotational information a stator of a synchro is... And speed, but in different ways any relating the two of them any relating the two categories. Without having to have a host system secondary windings ) idea how some Mitsubishi servo motors military! Cylindrical rotor and stator objects to activities & quot ; system without having to have a system! Large synchros were used on naval warships, such as destroyers, to operate the steering gear from the on. Devices called the synchro transmitter and the output requirements for parts ( higher resolution explosion! Then be calculated by be honest I dont know if the system power turned... Have two sets of windings 90 degrees apart an exciter winding ( and... 90 degrees apart resolution of some devices can reach 10,000 ppr and even mechanical types for parts higher! In that there is a form of synchro systems - torque systems and control systems not to. To connect it you will need to be honest I dont know if the system power is turned off back... Logout/ different makes of selsyns, used in the most important and 50 Hz 10... Converter Board solutions the whole system is often called a selsyn ( portmanteau!
