RU131251U1 - FAN-REACTIVE ELECTRIC MOTOR - Google Patents

Abstract

A ventilating electric motor comprising a housing, inside of which front and rear stud assemblies are located, a stator, a rotor rigidly fixed to the shaft, and a rotor position sensor, characterized in that the rotor position sensor is made in the form of an optical interrupter mounted on the shaft, and control board located under the back cover.

Description

The utility model relates to the field of electrical engineering, specifically to the valve-reactive electric motor of the separator, for example, the brand "SCM-80" manufactured by JSC "Motor-Sich".

The closest known to the applicants is a universal collector motor type DS-0.02 manufactured by Dnepropetrovsk Aggregate Plant CJSC (www.aodaz.com.ua).

The specified engine contains a housing, front and rear bearing units, a rotor rigidly mounted on the shaft, a stator integrated in the housing. A collector is fixed on the rear of the shaft, along which brushes are fixed in the brush holder.

The front and rear bearing assemblies comprise a front bearing shield and a bearing, as well as a rear bearing shield and a bearing, respectively.

This electric motor is selected as the prototype of the claimed utility model.

The prototype and the claimed utility model have the following common features:

- housing;

- front bearing unit;

- rear bearing assembly;

- stator;

- shaft;

- a rotor rigidly fixed to the shaft;

- rotor position sensor (in the prototype it is a collector with a brush assembly).

The following drawbacks are inherent in DC-0.02 type electric motors:

- the presence of a brush-collector assembly, which impairs reliability and requires special maintenance;

- the engine does not provide a smooth start and acceleration of the separator rotor.

The utility model is based on the task of creating the design of a valve-jet electric motor, in which by otherwise performing the rotor position sensor, to simplify the design of the electric motor and increase work efficiency due to smooth start-up with constant acceleration without jerking, stabilized engine speed in case of changes in the voltage of the supply network within 180-240 V and the possibility of operation at other values of the voltage and frequency of the power supply, for example, 110 V, 60 Hz

The problem is solved by the design of a valve-reactive electric motor containing a housing, inside which there are front and rear bearing units, a stator, a rotor rigidly mounted on the shaft, and a rotor position sensor, in that the mouth era position sensor is made in the form of an optical interrupter, fixed on the shaft and control board located under the rear cover.

Valve-jet motor shown in the drawing, where:

figure 1 is a side view in section;

figure 2 is a front view, section DD.

The valve-reactive electric motor comprises a housing 1, inside of which a ferromagnetic stator 2 is fixed, on which a coil winding 3 and permanent (parking) magnets 4 are located.

Inside the ferromagnetic stator 2 is a rotor 5, rigidly mounted on the shaft 6. The rotor 5 has a clearly pole structure with pole projections 7.

The air gap between the ferromagnetic stator 2 and the rotor 5 is provided by the front bearing assembly 8 with bearing 9 and the rear bearing assembly 10 with bearing 11.

An optical interrupter 12 is mounted on the shaft 6, behind the rear bearing assembly 10. Under the rear cover 13 of the housing 1 there is an integrated control board 14. In addition, on the shaft 6, behind the front bearing assembly 8, a fan 15 is fixed.

Power is supplied to the terminals 16 of the electric motor.

The principle of operation of an electric motor is based on the property of ferromagnetic materials to orient themselves in an external magnetic field so that the penetrating magnetic flux takes its maximum value. Which corresponds to the agreed position of the pole projections 7 of the rotor 5 and the stator 2 of the electric motor.

The valve-electric motor works in this way.

At the initial time, one of the pairs of pole protrusions of the rotor 5, for example, 7 is opposite the permanent magnets 4, thereby providing the initial position of the rotor 5 relative to the stator 2.

At the next point in time, when power is supplied to the coil winding 3 through a transistor switch located on the control board 14, the pole projections 7 of the rotor 5 tend to occupy a coordinated position with the pole protrusions of the stator 2 under the action of magnetic forces of attraction. This creates a tangential force Ft, which drives rotor 5 counterclockwise.

When the pole ledges 7 of the rotor 5 approach to an agreed position, the supply voltage is disconnected using the transistor commutator of the coil windings 3, while the rotor 5 will continue to move inertia in the same direction. Further, as soon as the next pair of pole protrusions 7 of rotor 5 occupies an inconsistent position with respect to the pole protrusions of stator 2, again the power is supplied from the transistor switch to the coil winding 3 and this pair of poles of rotor 5 tends to take an agreed position with the pole ones under the influence of magnetic forces protrusions of the stator 2, continuing the movement of the rotor 5 counterclockwise under the influence of the tangential force Ft, etc.

The sequence of supply, power and its shutdown to the coil winding 3 is determined by the position sensor of the rotor 5 behind the optical chopper 12 of the optical channel, while providing unidirectional rotation of the rotor 5 of the electric motor (counterclockwise). When the signal for movement is turned off, the power supply to the coil winding 3 is stopped and the rotor 5 stops.

Claims (1)

A valve-reactive electric motor comprising a housing inside which front and rear stud assemblies are located, a stator, a rotor rigidly fixed to the shaft, and a rotor position sensor, characterized in that the rotor position sensor is made in the form of an optical interrupter mounted on the shaft, and control board located under the back cover.

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