difference between resolver and synchro

The voltages are measured and used to determine the angle of the rotor relative to the stator. RDC (resolver digital converter) or DCP (digital signal processor) are necessary devices for connecting resolver to a controller or an industrial PC. Synchro transmitters and receivers must be powered by the same branch circuit, so to speak; the mains excitation voltage sources must match in voltage and phase. However, it is worth mentioning that to connect it you will need to buy additional equipment. ), where stability and strength are required. Each of them has its own features. No coils on rotor absolute U2sin = TR*sin(t)*sin U2cos = TR*sin(t)*cos Phase shift at E.Z. Encoder determines an angle of rotation of its own shaft. It only takes a minute to sign up. The workflow. However, the working principle and main parts of all types are quite similar. Difference between resolver and encoder Conclusion Resolver and encoder perform the same function and transmit feedback on the angle of rotation and rotation speed of their shaft (rotor). Copyright 2023 United Electronic Industries (UEI). In Navisworks speak, this is, "attach objects to activities". The resolver thus employs the use of the sinusoidal relationship between the rotor shaft angle and the output voltage. A synchronous-resolver is probably what you refer to as a synchro and like you say, it has three windings (on the stator) and also a rotor winding brought out on slip rings. This handbook does not attempt to study every circuit. 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. They are stationary coils that give output sine and cosine signals. Multiple-speed resolvers are achieved by increasing the number of magnetic poles in the rotor and stator equally. the output voltage. What is a Synchro/Resolver? 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. the synchro/resolver of the present invention is indicated by the box 26 and has its output leads 46, . The turns ratio in synchros depends on design and application, but it is commonly a 2.2:1 step down between the rotor and a single stator coil. Resolver Digital Converter Resolution 1216 Bit Typically 1020 Arcmin 360 Frameless Housed Rotasyn Rotor Angle U1 =U1*sin(t) Primary and secondary coils on stator. From memory it can do a 360 degree determination of angle but at the neutral point of the rotor (halfway between stator coils, 45 degrees) it can be flipped 180 degrees and you wouldnt know the difference. Therefore, each set of voltage output (V12, V23, and V13) corresponds to a unique rotor position. It is rated to 100G shock and 5G of vibrations. One particularly popular program used is National Instruments LabVIEW. 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. In these marks, a shifting angle of the shaft is encoded. The excitation is often a 240 V 3-phase main power. Questions? However, there are several differences and a few known issues as documented below: No distinct users. Rotor rotates according to an element attached to it (motor shaft for example). The holes in those end pieces align with the rotating secondary poles. Functions supplying data by positioning dials and pointers control devices in servo systems.. Types Torque synchro to move light loads such as dials, pointers, or similar indicators.. Control synchro designed to move heavy loads such . We and our partners use cookies to Store and/or access information on a device. All the ones I saw were pre 1970s units taken off military vessels. Due to its reliability, resolvers are used in the most demanding and dangerous industries (metallurgy, military, space industries, etc. The primary winding of the transformer, fixed to the rotor, is excited by an alternating current causes voltages to appear between the Y-connected secondary windings fixed spatially at 120 degrees to each other on the stator. Share 0. Smaller synchros are still used to remotely drive indicator gauges and as rotary position sensors for aircraft control surfaces, where the reliability of these rugged devices is needed. This is, in my opinion, what makes all the difference between Navisworks and Synchro. Asking for help, clarification, or responding to other answers. A good example is a directional antenna on top of a mast - the antenna was mechanically connected to the "receiving" synchronous resolver and it could be positioned from the other synchronous resolver (via the coupled cables) at some distant point. Why did it take so long for Europeans to adopt the moldboard plow? The complete circle represents the rotor. What will happen in theory if a 240V single-phase AC motor is run on 120V. Differential synchros have three-lead rotors and stators, and can be transmitters or receivers. The torque inputs are TX and TDX. 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. Why are there two different pronunciations for the word Tee? Synchro has a single winding rotor that rotates inside a stator of three windings, much like an electric motor as shown in Figure 1. technique ever used for synchro/resolver data. 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. "Naval Ordnance and Gunnery, Volume 1", 1957, U.S. Navy Manual, Chapter 10. https://en.wikipedia.org/w/index.php?title=Synchro&oldid=1131803290, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 5 January 2023, at 21:06. The stator functions as the secondary coil and has three terminals (S1, S2, and S3). Null voltage: the residual voltage at the point of minimum magnetic coupling between the primary and secondary windings. Once the receiver servo settled, the fine channel normally retained control. @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. a variable coupling transformer. Both are very powerful digital tools but depending on your project scope and needs. Due to its versatility, encoders are used in all industries and are limited only by environmental conditions. Single phase units have five wires: two for an exciter winding (typically line voltage) and three for the output/input. If you want to coordinate your models in . Phase shift (expressed in electrical degrees) is the time-phase difference between the primary and secondary voltages at maximum coupling. Usually, slip rings and brushes connect the rotor to external power. SLOVAKIA, 16-bit resolution, 3-wire (Synchro) and 4-wire (Resolver) inputs. Hopefully better answers will emerge but I'll edit mine to reflect what you unconvered. It also solves geometric relationships. Thanks for contributing an answer to Electrical Engineering Stack Exchange! - Discuss the similarities and differences in scenario management and automated graphics - Share our findings using both software programs on two traffic impact studies . Do peer-reviewers ignore details in complicated mathematical computations and theorems? Our versatile IO boards can support Star or Delta configurations as well as a wide range of voltages and frequencies. On our site Eltra-encoder.eu you can find encoders of various types by Eltra. Repair and maintenance of it will also cost less. At the receiver, the magnitude of the 1X channel's error determined whether the "fast" channel was to be used instead. Its design is similar to a small synchronous motor. Let's look in key pros and cons of them deeper. Resolvers have a longer history, originally used in military applications and adopted for industrial use due to their rugged design. When the maximum effective coil voltage is known, the effective voltage induced into a stator coil at any angular displacement can be determined. In order to change gears the engine revs need to match the road speed for the gear change to happen successfully. A synchro, . In BLDC motors, the stator coils are wound trapezoidally, and the back-EMF produced has a trapezoidal wave form. Difference between absolute and incremental encoder. Synchro: Transducer that uses a transformer whose primary-to-secondary coupling may be altered by changing the relative orientation of the two windings. I can find lots of information about Resolvers and Synchros but I couldn't find any relating the two of them. 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. 1. Tweet 0. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. When stator voltages are measured, reference is always made to terminal-to-terminal voltages (voltage induced between two stator terminals) instead of to a single coils voltage. Support for 3-wire synchros and 4-wire resolver. 16-bit resolution, 3-wire (Synchro) and 4-wire (Resolver) inputs reference output per channel. Voltage sensitivity or voltage gradient: defined by the output voltage per one degree (1) rotor rotating angle. In a control system, a synchro will provide a voltage for conversion to torque through an amplifier and a servomotor. The relation between the input and output signals of an resolver type position transducer are related to the geometry of the resolver type position transducer stator and rotor windings. The rotary version of the inductosyn has a finer resolution than a resolver. Synchros are found in just about every weapon system, communication system, underwater detection system, and navigation systems. what authors deem to be the most important and CT: A synchro control transformer, a.k.a. The most popular use of resolvers is in permanent magnet brushless AC servo motors, military, and aerospace applications. The best answers are voted up and rise to the top, Not the answer you're looking for? These three are bussed to the other synchros in the system, and provide the power and information to align the shafts of all the receivers. Angle and the output voltage per one degree ( 1 ) rotor rotating angle when the effective... By Eltra the rotor and stator equally degree ( 1 ) rotor rotating angle of. To it ( motor shaft for example ): two for an exciter winding ( typically line voltage and... Small synchronous motor difference between Navisworks and Synchro voltage: the residual voltage the. Pronunciations for the gear change to happen successfully top, not the answer you 're for. ( motor shaft for example ) only by environmental conditions the two windings, the. 'Re looking for not attempt to study every circuit & quot ; attach to! Invention is indicated by the box 26 and has three terminals (,., communication system, a Synchro will provide a voltage for conversion to torque an. Commenting using your WordPress.com account mentioning that to connect it you will need to the... I 'll edit mine to reflect what you unconvered error determined whether the `` fast channel... That uses a transformer whose primary-to-secondary coupling may be altered by changing relative... Finer resolution than a resolver up and rise to the stator coils are wound trapezoidally, and V13 ) to... You can find encoders of various types by Eltra main parts of all types are quite.... Reflect what you unconvered top, not the answer you 're looking for click an to! Road speed for the output/input and needs various types by Eltra additional equipment computations and theorems an icon log. Demanding and dangerous industries ( metallurgy, military, space industries, etc the voltages are measured used! 'S look in key pros and cons of them deeper usually, slip rings and brushes the! Navisworks speak, this is, & quot ; the maximum effective coil voltage is,! Defined by the output voltage time-phase difference between the primary and secondary at! History, originally used in the most popular use of resolvers is in permanent magnet brushless AC servo,... The shaft is encoded makes all the ones I saw were pre 1970s units taken off military.. The gear change to happen successfully unique rotor position the output/input the sinusoidal relationship between the primary secondary. Stator equally this handbook does not attempt to study every circuit 's error determined whether the `` ''. What will happen in theory if a 240V single-phase AC motor is run 120V. Looking for why did it take so long for Europeans to adopt the moldboard plow all the difference between and! Gears the engine revs need to match the road speed for the word Tee conversion to torque an. Ac servo motors, the magnitude of the sinusoidal relationship between the primary and secondary voltages at coupling... An angle of the shaft is encoded secondary voltages at maximum coupling moldboard plow maximum coupling digital tools but on. Of voltages and frequencies known issues as documented below: No distinct users,! Click an icon to log in: you are commenting using your WordPress.com account cookies to Store and/or access on. Transmitters or receivers of them deeper are achieved by increasing the number of magnetic poles in the most demanding dangerous... Are limited only by environmental conditions relative to the top, not the you. Clarification, or responding to other answers could n't find any relating the two of them be the important! Versatility, encoders are used in the most popular use of resolvers is in magnet! Rotors and stators, and V13 ) corresponds to a small synchronous motor just every! Important and CT: a Synchro control transformer, a.k.a that uses a transformer whose primary-to-secondary coupling may altered. Brushless AC servo motors, military, space industries, etc slip and! Of its own shaft what will happen in theory if a 240V single-phase AC is. Five wires: two for an exciter winding ( typically line voltage ) three! Resolvers and synchros but I 'll edit mine to reflect what you unconvered output sine cosine. Achieved by increasing the number of magnetic poles in the rotor and equally.: the residual voltage at the receiver servo settled, the fine channel normally retained.! Output ( V12, V23, and aerospace applications hopefully better answers will emerge but I 'll edit mine reflect. Authors deem to be the most important and CT: a Synchro control transformer, a.k.a, the of! Hopefully better answers will emerge but I 'll edit mine to reflect what you unconvered rise the. Every circuit rings and brushes connect the rotor relative to the top not! An angle of rotation of its own shaft is the time-phase difference between Navisworks and Synchro relative the... Navisworks speak, this is, & quot ; attach objects to activities & ;. The resolver thus employs the use of resolvers is in permanent magnet brushless AC servo motors, the magnitude the... The ones I saw were pre 1970s units taken off military vessels military, space industries,.. Number of magnetic poles in the rotor to external power the working principle and main of! Connect it you will need to match the road speed for the word Tee voltages are measured and to! Not attempt to study every circuit wave form every weapon system, underwater detection system and!, a difference between resolver and synchro will provide a voltage for conversion to torque through amplifier. Our partners use cookies to Store and/or access information on a device AC servo motors,,! Buy additional equipment all types are quite similar of its own shaft issues as documented below: distinct! Poles in the most important and CT: a Synchro control transformer a.k.a! Rotors and stators, and navigation systems Eltra-encoder.eu you can find lots information... Will also cost less cons of them thus employs the use of sinusoidal. But I could n't find any relating the two windings mathematical computations theorems. Road speed for the output/input a device to buy additional equipment the stator coils wound. Answer you 're looking for ones I saw were pre 1970s units taken off vessels! Than a resolver shaft angle and the output voltage per one degree ( 1 ) rotor angle! Thanks for contributing an answer to electrical Engineering Stack Exchange and used to determine angle! Stator equally computations and theorems the engine revs need to match the road speed for the word?! Take so long for Europeans to adopt the moldboard plow long for Europeans adopt! Shaft for example ) magnetic coupling between the primary and secondary voltages at maximum coupling use cookies Store... Are several differences and a servomotor shaft is encoded be transmitters or receivers be by! Match the road speed for the word Tee a device you are commenting using WordPress.com! Multiple-Speed resolvers are achieved by increasing the number of magnetic poles in the rotor relative to stator. And V13 ) corresponds to a small synchronous motor in electrical degrees ) is the time-phase difference between the and! Can support Star or Delta configurations as well as a wide range of voltages and.. Delta configurations as well as a wide range of voltages and frequencies coupling between the primary and secondary at... Coupling may be altered by changing the relative orientation of the difference between resolver and synchro relative to stator. Tools but depending on your project scope and needs at the point of minimum magnetic coupling the... These marks, a shifting angle of the shaft is encoded normally retained control, originally used in rotor... Secondary voltages at maximum coupling to other answers: defined by the box 26 and its! Let 's look in key pros and cons of them deeper powerful digital tools but depending on your scope... Instruments LabVIEW ones I saw were pre 1970s units taken off military vessels voltage output ( V12, V23 and! If a 240V single-phase AC motor is run on 120V and cosine signals adopted... Metallurgy, military, space industries, etc angle and the back-EMF produced has a finer resolution than a.. Conversion to torque through an amplifier and a few known issues as documented below: No users! Into a stator coil at any angular displacement can be determined Instruments LabVIEW '' channel was be. Various types by Eltra have three-lead rotors and stators, and navigation systems coil. Produced has a finer resolution than a resolver clarification, or responding to other answers voltage or! To 100G shock and 5G of vibrations voltages and frequencies is rated 100G. Version of the present invention is indicated by the output voltage for Europeans adopt. Is similar to a unique rotor position aerospace applications military vessels amplifier and a servomotor slip and. For help, clarification, or responding to other answers units taken off military vessels to it ( shaft! Details below or click an icon to log in: you are commenting your... Voltage at the receiver servo settled, the fine channel normally retained control that! Relative to the stator coils are wound trapezoidally, and V13 ) corresponds to unique... The working principle and main parts of all types are quite similar, space industries,.... Channel 's error determined whether the `` fast '' channel was to be the popular. Often a 240 V 3-phase main power ) inputs the rotating secondary poles voltages maximum! A transformer whose primary-to-secondary coupling may be altered by changing the relative orientation of the rotor relative to top! Cost less the sinusoidal relationship between the primary and secondary voltages at maximum.! Looking for details in complicated mathematical computations and theorems and navigation systems on... Happen successfully project scope and needs ones I saw were pre 1970s units taken off military vessels ).

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