The rotor axis makes an angle θ r concerning the stator windings S 2. The figure below shows the rotor position of the synchro transmitter. Let V s1, V s2, V s3 be the voltages generated in the stator windings S 1, S 2, and S 3 respectively. The voltage is induced in the stator winding. The flux linked in the stator winding is equal to the cosine of the angle between the rotor and stator. The voltage is induced in the stator winding because of the mutual induction between the rotor and stator flux. The voltage applied to the rotor induces the magnetizing current and an alternating flux along its axis. The constructional feature of the synchros is shown in the figure below.Ĭonsider the voltage is applied to the rotor of the transmitter as shown in the figure above. The AC voltage is applied to the rotor with the help of slip rings. The rotor of the synchros is a dumbbell in shape, and a concentric coil is wound on it. The coils of the stator windings are connected in star.
The AC voltage is applied to the rotor of the transmitter and it is expressed as The axis of the stator winding is kept 120º apart from each other. The stator is slotted for housing the three phase windings. The stator of the synchros is made of steel for reducing the iron losses. Synchros Transmitter – Their construction is similar to the three phase alternator. The detail explanation of synchros transmitter and receiver is given below. The synchro always works with these two parts. The controls synchros is used for error detection in positional control systems. The control type Synchro is used for driving the large loads. This type of synchros has small output torque, and hence they are used for running the very light load like a pointer. All the ones I saw were pre 1970s units taken off military vessels.The synchro system is of two types. To be honest I don't know if the synchronous resolver is still being made so this may be a problem. 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. 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 wouldn't know the difference. Now here's 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 don't believe it can be used in the above example.ĮDIT - this section is incorrect but I've left it in so that I can be justifiably ridiculed and tormented by my error. The accuracy appeared to be phenomenal and that's not a surprise given the cost of them. 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. 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. 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.
#Synchro resolver dap generator#
They are just like a synchronous motor or generator used in industry but way smaller. I can tell you about synchronous resolvers because I was trained on them in my apprenticeship.Ī 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.
0 kommentar(er)
