Synchrocontrols allow a friendly party to pilot a transformer by remote control. In the synchro mode, the threewire input is converted to two voltage signals in a scotttee transformer arrangement. The synchro pair measures and compares two angular displacements and its output voltage are approximately linear with an angular difference of the axis of both the shafts. Sel487e transformer differential relay threephase transformer protection, automation, and control system major features and benefits the sel487e transformer differential relay provides threephase differential protection for transformer applications with up to five threephase restraint current inputs.
Control transformers a control transformer is just what its name impliesa control synchro device accurately governing some type of power amplifying device used for moving heavy equipment. The transmitter, or synchro generator, consists of a rotor with a single winding and a stator with three windings placed 120 degrees apart. Sae as 2070825b 2017 synchro, control transformer, type 16ctb4b. A transformer having its secondary winding on a rotor.
All standard synchros are labeled with such a code. An amplidyne is an electromechanical amplifier invented prior to world war ii by ernst alexanderson. Synchro and resolver engineering handbook moog, inc. With brtec which inherently includes an absolute position resolving positiondependentflux high frequency rotating transformer pdf hft completely replacing the low frequency cascaded multiphase slipring assembly electric machine example of figure 1, the cascaded electric machine of figure 1 with the power of one electric machine. The first point to be noticed is that the ac excitation is fed only to the input device. Here the term rotating transformer means the primary to secondary coupling can be changed by physically changing the. Explain the theory and operation of a control transformer. Find the desired subject in the the table of contents, then enter that page number into your reader to go directl\r \rthis file is also searchable. The protection controls ss3cp transformer is a component for protectofier flame safety burner management system. In simpler terms, a torque synchro system is a system in which the transmitted signal does the usable work. The reference winding is located in the rotor of the resolver, the sin and cos. Synchros are often used for measuring the angle of a rotating machine such as an antenna platform.
The second hscdx14 module is a cos output control transformer and is, transformer input 16 a. A variation of the synchro transmitter is the control transformer. Linear variable differential transformer sensors are used for manufacturing dimension inspection, weighing equipment, feedback for hydraulic cylinders, force control measurement, bore hole depth, height measurement for. Decade synchro resolver standards combine the functions of a decade synchro standard and a decade resolver standard into a single unit. Selsyn synchro motors ac motors electronics textbook. The synchroresolver conversion handbookis designed as a practical reference source. The system includes a small, temperature control panel housing a 24v control transformer and timeclock.
Traditionally a control transformer ct, an electro mechanical device, would be fed by the output of a control transmitter cx, thus forming a synchroresolver. For calibrationgrade accuracy up to 2 arc seconds, a synchroresolver bridge and phase angle voltmeter pav are required. Transformer ss3cp, plugin type provides low voltage for flamepak circuit and power source for e and uv terminals. The purpose or this publication is to provide to all naval activities necessary information and operational characteristics of navy synchros. The voltage generates by the rotor of control transformer is equal to the cosine of the angle between the rotors of the transmitter and the controller. A resolver control transmitter has one primary winding, the reference winding, and two secondary windings, the sin and cos windings. Synchro and resolver conversion, geoffrey boyes, analog devices, 1980. Explain how the cx and cdx differ from the tx and tdx. Transformer protection and control ret630 product guide. All about synchros, resolvers, and data acquisition.
The pcisynchrotm output channels are complete pci to synchro and resolver output converters used for selftest, simulation, and control in military and industrial applications. A synchro system is formed by interconnection of the devices called the synchro transmitter and the synchro control transformer. They simultaneously accept a 3 wire synchro input 0 and a digital angle input 0, and provide an ouput which is the sine of the difference between these two input angles a sin wt sin 00 wt is. Synchro application guide precision motion control. Ddc is a leader in high reliability transformer, magnetic and cable assembly solutions for the aerospace, defense, and space industries, with beta transformer and north hills brands offering field proven magnetics solutions for the most demanding environments, including extreme temperature, shock, vibration, dust, fluid, and radiation. Coby used a set of controls built into a column in the autobot base. For calibrationgrade accuracy up to 2 arc seconds, a synchro resolver bridge and phase angle voltmeter pav are required. S3, a set of carrierfrequency signals of the type produced by a. The output is taken from the rotor of a similar device, called the control transformer, ct, as a voltage signal. United states navy synchros description and operation. The current of the same and magnitude flow through the transmitter and control transformer of the synchros. Accepts, at its 3wire stator terminals s1, s2, and. Control transformer the ct consists of a threephase, yconnected stator and a singlephase drum cylindrical rotor.
Figure 124 shows a phantom view of a typical ct and its schematic symbols. Further, the ied incorporates a synchrocheck function to ensure that the voltage, phase angle and frequency on either side of an open circuit breaker satisfy the conditions for safe interconnection of two networks. Sae2070825b2017synchro, control transformer, type 16ctb4b customer service. As a circuit element, the synchro is essentially a variablecoupling transformer. Synchro and resolver conversion, 1980 education analog. The construction of synchro control transformer is similar to that of synchro transmitter except the shape of rotor. Because of the circulating current, the flux is established between the air gap flux of the control transformer. Fundamentals and advancements in generator synchronizing. An integral part of these control systems is the synchro control transformer.
The flux axis of the control transformer and the transmitter is aligned in the same position. The output of the transmitter is given to stator winding of the control transformer which is shown in the above figure. Synchro control transformer the functioning of a synchro control transformer was described earlier in this chapter. Due to their transformer coupled inputs, commonmode effects are minimized. Control transformer an overview sciencedirect topics. These instruments can read the synchro signal directly in degrees. The synchro pair measures and compares two angular displacements and its output voltage is approximately linear with angular difference of the axis of both the shafts. Kearfott 05088cr41095031 singer synchro resolver control.
High accuracy control transformer vel gain e sin demod d error processor vel t, high z within 100 ns, data valid within 150 ns. A synchro also known as selsyn and by other brand names is, in effect, a transformer whose primarytosecondary coupling may be varied by physically changing the relative orientation of the two windings. After conversion, the voltage comparator operates in the same manner as in the resolver mode. A synchro designated 16ctb4b is the first modification of a 400hz control transformer with a rotatable stator and a diameter of between 1. Fundamentals and advancements in generator synchronizing systems. It is believed that it will be most useful to the technicians on shipboard and in. Digital to synchroresolver conversion analog devices. Control synchro system operation a control synchro system consisting of a control transmitter and a control transformer is illustrated in figure 125. Synchrosym is a patented integrated electric machine circuit and control architecture that provides the only practical electric machine system with brushless real time emulation control brtec. In such a system, accuracy on the order of one degree is attainable. This gives design engineers a unique opportunity to improve availability and reliability, and enhances. The synchro compares the actual load position with the ordered position.
Scottt transformer rh out rl out amplifier or transformer optional ds or dr output scaling rh, synchro on board oscillator option with 1. The pci card is populated by industry standard digital to synchro andor digital to resolver converters, cts or cdxs mixed as specified for the application. It consists of an electric motor driving a dc generator. List the basic components that compose a control synchro system. Its control layout is notably similar to the canyon racer xl arcade game fiction cybertron cartoon. This feature of the control transformer minimizes the changes in the rotor impedance with the rotation of the shaft. It was prepared by the staff of memory devices, a division of analog devices in the uk where the products were initially manufactured during the 1970s. This book is an excellent treatment of synchros, resolvers, and resolvertodigital conversion with applications. A nulling type instrument used with a phase angle voltmeter to directly and accurately measure the electrical output of a synchro or resolver. Instrumentation and control module 5 position indicators. The panel could be located in a mechanical room for convenient but restricted access to keep people from tampering with the timeclock, for instance.
The synchro resolver conversion handbookis designed as a practical reference source. The ss3cp transformer is a component for protectofier flame safety burner management system. The fan is started using a relay rather than interlocking the fan motors power wiring. The transmitter equations show that no where over the entire 360 rotation of the rotor will the same set of stator voltages appear. Synchro systems were first used in the control systems of the panama canal to transmit lock gate and valve stem positions, along with water levels to the control desks. The rotor of the control transformer is made cylindrical so that the air gap is practically uniform. Apis automatically compensate for phase shift, noise, and distortion. It discusses the theory of operation of data converter products synchro, resolver, and linear variable differential transformer lvdt, performance parameters, and design factors for typical applications. Mar 25, 2017 synchro position transducer working principle we know that syncro is an inductive device which works on the principle of rotating transformer. A synchro system is formed by the interconnection of the devices called the synchro transmitter and the synchro control transformer.
Some pdf files are protected by digital rights management. Explain the operation of a control synchro system and how it is used to control a servo system. The constructional features, electrical circuit and a schematic symbol of control transformer are shown in the below figure. Electrical output from rotor proportional to the sine of the angle between. Electric input to stator from cx or cdx, mechanical input to rotor. In power plants with more than a single generator or installations with multiple synchronizing breakers, complicated synchronizing circuits with many contacts are required to switch the voltage transformer vt and control signals between the operator controls and the highvoltage equipment.
A resolver is a rotary transformer where the magnitude of the energy through the resolver windings varies sinusoidally as the shaft rotates. Highreliability position control for rugged applications. Synchro and resolver conversion handbook abridged chapters 1 and 2 only north atlantic industries, inc. Apply 115volt, 60cycle ac power from a local source to control stator terminals s1 and s3. When hot shot was temporarily blinded while driving on a hazardous space bridge, red alert ordered coby hansen to take over via synchrocontrol. The most common use of dscs and drcs is for driving synchro or resolver control transformers. A control transformer is a high impedance version of the torque receiver with the rotor winding aligned at 90 degrees from that of a tr. These devices are incorporated into synchro systems for automatic control rod positioning in some reactor facilities. The stator windings of the cx are connected to the stator windings of the ct and both synchros are shown on 0 notice, that at 0. Find synchro control transformer related suppliers, manufacturers, products and specifications on globalspec a trusted source of synchro control transformer information. Its rotor is wound with more turns than a transmitter or receiver to make it more sensitive at detecting a null as it is rotated, typically, by a servo system. Synchro position transducer working principle we know that syncro is an inductive device which works on the principle of rotating transformer.
Ovgu1 page iv of 96 foreword to 2nd edition these reproduced chapters are as relevant today as they were when initially published 20. A sin output with choice of synchro, resoiver, or, control transformer module as follows. Carefully rotate the control transformer to obtain minimum voltmeter indication. Here the term rotating transformer means the primary to secondary coupling can be changed by physically changing the relative orientation of the winding.
Pci synchro series computer conversions corporation. Due to their transformercoupled inputs, commonmode effects are minimized. The rotor of the synchro control transformer is turned by the response shaft, which is geared to the load and so indicates what the position of the load actually is. In normal usage, the stator is the primary element.
In its general physical construction, it is much like an electric motor. It has three equally spaced stator windings like a tx. Protection and control for for every step you take abb provides a full range of terminals combined with systemwide backup functionality to allow tremendous flexibility in designing the required protection, control and monitoring systems. The synchro signal amplifier is actually a synchro. Synchro and resolver white paper jd technologies, llc. The amplidyne is used in industry in high power servo and control systems, to amplify low power control. For a synchro operating at 400 hz working into an open circuit, the output voltage will always lead the input voltage by a few degrees 8 to 20 for small sizes. In a control system, a synchro will provide a voltage for conversion to torque through an amplifier and a servomotor. Synchro transmitter and receiver pantech solutions. The constructional features, electrical circuit and. The signal to be amplified is applied to the generators field winding, and its output voltage is an amplified copy of the field current. The ct consists of a threephase, yconnected stator and a single phase. Sae as 2070825b2017 synchro, control transformer, type.
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