SU391682A1 - ELECTRIC MOTOR - Google Patents

Description

The invention relates to electric motors with an integrated friction electromagnetic clutch and brake.

A motor with an integrated electromagnetic friction clutch and brakes containing electromagnetic systems with excitation winding / MI separately for the clutch and brake, two axially spring-loaded bark, one of which is mounted on the driven shaft with only axial displacement, is known.

The purpose of the invention is to provide automatic maintenance of a given speed of rotation of the electric motor and the driven shaft when the magnitude of the moment of resistance of the load is changed.

This is achieved by the fact that a brake disc fixed to the driven shaft is mounted between the said crusts, the other crust is spring-loaded relative to the motor housing, and the field windings are connected in series and included in the power supply target of the engine.

The drawing shows a longitudinal section of a part of the engine from the side of the built-in electromagnetic friction clutch and brake.

A sequential excitation motor having a bore 1 mounted in the stator housing 2 contains an electromagnetic friction coupling clutch and a brake connected to the driven shaft 3. The electromagnetic friction clutch has an excitation system consisting of the magnetic field 4, the winding 5 of the excitation and the core 6 which is rigidly fixed on the shaft 7 of the electric motor, for example, a key 8 and a nut 9, as well as the core 10. The anchor 10 is mounted on the driven shaft 3 L is spring-loaded in the axial direction

a spring 11 fixed with the help of a stop nut 12. The electromagnetic friction brake has a BOOSTER excitation system consisting of a magnetic circuit 13, an excitation winding 14 and a pinch 15. The electromagnetic brake is installed in the housing so that the core 15 goes to the side of the position of the electromagnetic clutch 10 .

The anchor 15 has holes for the studs 16 and is provided with pushers 17 with a disc 18 at the ends. A spring 19 is installed between the housing 2 and the disk 18, which allows the pushers 15 to move in the axial direction. On the shaft 3 there is a rigidly mounted brake disc 20, provided on one side with pins 21 entering the holes in the bit 2. The driven shaft 5 is mounted in the housing 2 with the support 22 and 23. The windings 5 and 14 of the excitation are connected in series and included in the circuit power supply of the electric motor, and the ampere blinks of the winding 14 are taken less than the amlervics of the winding 5.

The proposed electric motor works as follows.

When the engine is connected to the source of power, the full current of the engine passes through the windings 5 and 14 of the excitation, as a result, the core 15 is attracted to the magnetic conductor 13, the spring 19 is compressed and disengaged and the engine is pulled to the core 6, contracted the spring 11 to provides the transmission of torque from the shaft 7 to the shaft 3.

When decreasing the magnitude of the braking torque of the load, the speed of the engine starts to increase, and the current consumption decreases. A decrease in current causes a weakening of the magnetic flux holding the bark 10 and 15. As the current decreases to the set value, the spring 19 begins to move the cork 15 in the direction of the brake disc 20, which leads to the appearance of friction forces between the bark 15 and the brake disk 20. Braking A disk 20 with a bark 15 increases the moment of resistance to the shaft 5 and thereby reduces the speed of rotation of the shaft 3 and the core /, which in turn causes an increase in the current of the core, and the cortex 15 is again attracted to the magnetic circuit 13.

Periodic podtarmazh disk 20 spit 15 provides automatic maintenance of the speed of rotation of the core within the specified limits. When the engine is disconnected from the source, the de-energization of the excitation windings 5 and 14 and movement of

under the action of the springs 11 and 19 of the scraps 10 and 15 in the direction of the brake disc 20. As a result, the I cork 15 provides automatic braking of the output shaft of the electric motor, and the movement of the stick 10 causes an automatic deactivation of the clutch.

Pre Dmet from the straps

An electric motor with a built-in electromagnetic clutch and a brake containing electromagnetic systems with excitation windings separately for the clutch and brake contained in the motor housing, two axially spring-loaded cores, one of which is mounted on the driven shaft with the possibility of only axial movement, characterized in that in order to ensure the automatic maintenance of a given speed of rotation of the core

when the magnitude of the moment of resistance of the load is changed by the electric motor and the driven shaft, a brake disk fixed to the driven shaft is mounted between the indicated bits, the other crust is spring-loaded

relative to the motor housing, and the field windings are connected in series and connected to the motor power supply circuit.

/ 8 P / 4 15 20 11

. IS 10/9

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