Novel integrated alternating current servo techogenerator set

Abstract

The invention discloses a novel integrated alternating current servo techogenerator set. The novel integrated alternating current servo techogenerator set comprises a rotating shaft, a copper sleeve, an inner stator iron core, permanent magnet steel, a Hall element, an unslotted rotor, a magnetism isolating pillowcase, an outer stator iron core, an exciting winding, a chassis, an end cover and a matched bearing. The rotating shaft penetrates through the unslotted rotor, a center hole of the copper sleeve and the bearing and is fixed by virtue of the end cover and the chassis; the inner stator iron core is fixed with the end cover by virtue of the copper sleeve, the permanent magnet steel and the Hall element are embedded into a groove of the inner stator iron core; the outer stator iron core is fixed with the chassis, and the exciting winding is embedded into a winding slot of the outer stator iron core; an unslotted rotor cup body is arranged in a gap between the inner stator iron core and the outer stator iron core; the unslotted rotor comprises an iron core, an inner-layer short circuit winding and an outer-layer short circuit winding; and the iron core is divided into an inner layer and an outer layer by the magnetism isolating pillowcase. The novel alternating current servo techogenerator set has the advantages that the motor and a speed detector share the same rotor, structure is compact, volume is small, operation is stable, an electrical signal corresponding to angular velocity of the set can be directly output, linear error is small, and no residual voltage is produced.

Description

technical field [0001] The invention relates to an AC servo speed measuring unit, and more specifically relates to a novel integrated AC servo speed measuring unit. Background technique [0002] The servo motor, also known as the executive motor, is used as an actuator in the automatic control system to convert the input voltage signal into the angular displacement or angular velocity output of the rotating shaft. Servo motors can be divided into DC servo motors and AC servo motors according to the nature of the power supply. Among them, the instantaneous rotational angular velocity information is an important parameter of the servo motor. Through the measurement of the rotational angular velocity, the monitoring of the operating state of the servo motor can be realized, and the servo motor can be controlled according to the production requirements. [0003] At present, AC servo tachometer units are often used. The manufacturing process is generally that the servo motor and...

AI Technical Summary

Problems solved by technology

[0003] At present, AC servo tachometer units are often used. The manufacturing process is generally that the servo motor and the tachometer share the same shaft, but the stator and rotor windings (or the cup body of the cup-shaped rotor) are of two-stage structure. Therefore, the overall shape of the tachometer unit Most of them are slender and large in size, and the manufacturing cost of the unit is relatively high

In addition, the tachometer generator used in the unit is an AC tachometer generator, and there are nonlinear errors in the output characteristics during operation. The main reason is the pulsating magnetic field generated when the rotor rotates, and the leakage reactance of the cup-shaped rotor. In addition, due to The two-phase stator windings of the AC asynchronous tachogenerator are not completely vertical, or the air gap is uneven, the magnetic circuit is asymmetrical, or the wall thickness of the hollow cup rotor is uneven, and the material of the cup rotor is uneven, which will cause certain The residual voltage of

Images