SU448556A1 - Contactless DC motor - Google Patents

Description

This invention relates to an electric motor.

Known contactless electric d.c. comprising three phase-anchor coil connected to the output of the semiconductor switch, controlled by signals odnofaznoi winding position sensor rotor through trigger generator and fazorasschepitel and the magnetic rotor with the number of pole pairs p and the non-sinusoidal distribution of the induction in the gap, for example, with the content of the third harmonic.

The disadvantage of such electric motors is the complexity of the design due to the presence of an additional stator magnetic circuit and sensor rotor.

The purpose of the invention is to eliminate this drawback.

The goal is achieved by the fact that the single-phase winding of the rotor position sensor is performed with the number of pole pairs 3) e and is placed on a common magnetic core with a core winding.

The drawing shows a structural diagram of an electric motor.

The three-phase root winding I of the electric motor is connected to the output of the semiconductor switch 2, controlled by signals from the single-phase winding 3 of the rotor sensor through the starting generator 4 and the phase splitter 5. The electric motor contains a magnetic rotor 6 with a number of pole pairs (in this case 1) and a non-sinusoidal induction in the gap, for example, with the content of the third harmonic. The start-up generator 4 contains the time specifying a chain of resistor 7 and capacitor "and a terminating resistor 9, through which the winding 3 of the rotor position sensor 3 located on the common magnetic conductor with the main winding I is connected.

When the supply voltage is applied, the starting generator 4 starts to operate at the frequency required for the motor to enter synchronism. The frequency of the starting generator pulses is selected using the RC elements 7 and 8. The phase splitter 5 forms a three-phase alternating voltage from a single-phase alternating voltage that controls the switch ,,. ";" .. When the rotary rotator i is rotated into one factory winding 3, with the number of pairs of poles A third-harmonic emf is given, the signal of which synchronizes the clock to that of the starting generator 4. In the further process of acceleration and operation in the nominal mode occurs similarly to a conventional non-contact DC motor.

; The reinforcement of the third hermonic floor in the aaisope air can be made by creating an uneven air gap. | Under the poles of a magnet. Or by performing; a composite magnet. Uneven.; Dimensional air gap under the poles

003 is due to the removal of the active material of these poles.

in the form of various cuts. T Composite magnet can be made of two or more magnets, for example, six pole

sprockets and bipolar cylindrical riic magnet.

: PREVIOUS INVENTIONS

A contactless DC motor containing a three-phase main winding, a sub-switch; connection to the semiconductor output

a switch controlled by signals from a single-phase winding of a rotor position sensor through a starting generator and a phase splitter, and a magnetic poToip with a number of pole pairs. providing a non-sinusoidal distribution of induction in the gap, for example, containing the third

harmonics from and to the fact that, in order to simplify the design of the engine, the single-phase winding of the rotor position sensor

made with the number of pairs of poles 3 and placed on a common magnetic conductor with the core winding.