SU250286A1 - VENTILATED ELECTRIC MOTOR WITH BRUSHLESS EXCITATION SYSTEM - Google Patents

Description

Valve electric motors with a brushless anstema driven, containing a rotating transformer and a rectifying semiconductor unit in the rotor, and valve control C are given by signals from the rotor position sensor.

However, in such engines, the presence of separately mounted rotor position sensors leads to a COMPOSITION COMPOSITION,

reduce its hope.

The proposed electric motor differs from the known ones there that, in order to simplify the co1H Structures by combining the rotor position sensor with the excitation device, the T1 transformator is implemented with the ePODEfactual multiphase winding, phase cords, and the fuzzes that are applied to the tempered by the multiphasic excitation winding, phase coils AC stitches are placed on separate rods of the magnetic circuit and with a secondary winding located on an annular rotating magnetic core that forms the core There is an irregular gap, and as the output of the position sensor, additional windings (tra) are used, which are connected with fixed phase coils.

electric motor; in fig. 2 is a schematic diagram of an excitation transformer 1.

The electric motor consists of a synchronous motor 1, an excitation transformer 2

and a semiconductor rectifier 3 (in the drawing, the frequency converter and the number of phases of the power circuit are not shown). The synchronous motor has a winding 4 and an excitation winding 5 on the rotor. The field winding is pulled from the transformer via a semi-conductor rectifier 3 located on the rotor.

The excitation transformer consists of a fixed part of the stepper section of the magnetic cores 6-8, on which the primary windings 9- connected in parallel are located, and the movable part of the magnetic circuit 12 with the winding 13.

The movable part of Transformer Magnitogue 12, like AND semiconductor rectifier M1, is attached to the rotor of the C41 synchronous motor and rotates 1c together with and to them. The transformer, in general, can be mounted inside the motor core, which is preferable, or on the outer part of it. The stationary part of the transformer control strip consists of three rods that are offset 1 by 120 ° from each other. Parallel magnetic cores can be

The number of capacitors required (the number of sensors is positive and h, and 1 slots are 1polar at the synchro engine (Fig. 2 shows a diagram for one pair of poles). of the non-adjustable part of the magnetic circuit, which turns these rods and their location in their windings into other sensors of the rotor position. The design of the magnetic conductor, which determines the change in the air gap, This is a signal received from the signal. For each coil of the transformer, the output windings 14-16 of the rotor position sensor are connected.

Traction excitation p-mat works in the following way |

When IB is turned on, the primary winding of the transformer runs on an alternating excitation current, which creates a small-sided flow in the mapping pipeline. The alternating current induced in the secondary winding of the transformer through the rectifier 3 feeds the excitation winding 5 of the synchronous motor. The rotor of the transformer, which occupies some arbitrary position, provides for “airspace” air gaps under various magnet rods, for example, under a rod with a winding 9, the largest air gap. This leads to the fact that the magnetic conductivity of this section of the smallcircuit and the inductance of the winding turn out to be the smallest | M | I, and the current passing through the winding is greatest compared to other winding branches. By registering the sensor located outside the motor windings 14–16 of the sensor, the difference of current passing through the windings 9–11, one can clearly judge the position of the rotor relative to each of the rods. When the rotor rotates, the region with the largest air gap moves alternately under each of the rods. The character of the signal change when the rotor is moved, as in conventional throttle sensors with non-temporal air gap, is determined by the shape of the air gap change and can be selected depending on distance and az number.

In order to eliminate the ripple of the excitation current from a change in the magnetic conductivity of the transformer magnetic circuit, the change in air gap H is produced strictly 5 in series and in such a way that is equivalent to the conductivity of the entire magnetic core of the transformer as the rotor rotates. This requirement is easily fulfilled, for example, at the constant evolution of the air gap between the movable and fixed parts of the magnetic conductor and the identity of the 1К01Н structure of the Bicex rods. The constancy of the equivalent air gap can be obtained, for example, at an angle

5 notches in the rotor, equal to the distance between two adjacent parallel sections of the magnet-irood, i.e. 120 °.

The deception of the magnetic conductivity of individual y4a.CTKOiB. Transformer small-wire pipelines should also be provided by other means, for example, by magnetically shielding portions of the moving part of the small-wire line or by mechanically adjusting them.

Subject invention

Valve ElectroneIgatel with a brushless excitation system containing a rotating transformer and an actuator

0 semiconductor unit on the rotor, and with valve control signals of the rotor position sensor, characterized in that, in order to simplify the design by combining the rotor position sensor with the brushless excitation device, a transformer (Completed with a stationary multifaceted primary winding, whose phase coils, connected in parallel, connected respectively to the beginning. and ends to the terminals

0 of the alternating current source. And placed on separate rods of the magnetic conductor, and with a secondary winding located on an annular rotating magnetic core, forming an uneven gap with the rods,

5a, additional windings connected to stationary phase coils are used as output circuits of the rotor position sensor.

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