SU705609A1 - Method of controlling rectifier controlled repulsion motor - Google Patents

Description

(54) METHOD OF CONTROL OF REPULSION VENTILATION MOTOR

The invention relates to electrical engineering and can be used in a traction drive and in another adjustable drive.

Known repulsion motors (WFD) with a single-phase primary winding and a multi-phase open and closed secondary winding are known, the outputs of which are switched using valves controlled by a rotor position sensor (1)

Methods are also known for controlling a WFD with a single-phase short-circuited rotor by supplying main control pulses to a pair of valves connecting the diametrically opposite terminals of the core winding to a source, or AC or DC power supply 2.

However, the known method of controlling a valve repulsion engine has a number of significant drawbacks.

1. Natural switching of the commutator valves in the three-phase stator winding circuit is possible only up to the rotation frequency Hzr f. At the same time, the engine has a low power coefficient and poor utilization of active materials.

2. When artificially switching, the WFD, as a revision machine, will have the best energy performance and the use of active materials in the area of synchronous rotation frequency f | ft, corresponding to its circular rotating field. With frequent rotations below synchronous efficiency and engine power factor is lowered, especially in the start-up area.

3.VRD has electromechanical characteristics of the series type and cannot be switched to regenerative braking.

The aim of the invention is to eliminate the disadvantages of the known method of controlling a repulsion motor.

To achieve this goal it is necessary

5 control the pairs of counter-parallel gates of the switch so that they are connected to the power source (Four winding bar terminals, displaced in space relative to each other at an angle of 90 e. Deg.

The best use of the active materials of the engine can be ensured if the control pulses of the valve are mutually perpendicular to the winding axis.

The cores will be out of phase in time at an adjustable angle depending on engine operation. In this case, the engine torque will be maximized.

The drawing shows a diagram illustrating the proposed method for controlling the WFD.

The repulsive valve motor contains a single-phase short-circuited (secondary) winding of the first rotor, a multi-phase (primary) winding 2 of the stator, controlled valves 3–10, connected to four winding core (stator) 2, shifted in space relative to each other by an angle of 90 el. hail (in the drawing, for simplicity, only four pairs of opposing valves are shown), frequency and phase setpoint generator 11, rotor position sensor 12, control system 3 ..-; .L ;; When voltage is applied to the control system 13 and to valves 3-J-6 and 7-S, a two-phase alternating voltage is applied to the winding 2 of the motor stator.: ;; .- .-- -

The valves 3-6 form the magnetic axis of the electric power transformations from the primary winding 2 to the secondary I and 6 curtains | 1 simultaneously with the valves 7-10 by the sensor 12 when the magnetic axis of the rotor is close to the position of the transformation axis.

The valves 7-10, in turn, form a magnetic axis of excitation of the axis, perpendicular to the transformation axis. The resulting flow along the transformation axis of the windings 2 and I induces a transfumator voltage and current in the latter. The magnetic flux of the excitation of the winding 2, interacting with the current of the winding I, creates a torque. In the winding 2, the excitation flow is induced by the driving voltage EMF, balancing the transformer EMF .;

Regulation of the frequency of rotation of the WFD at a constant voltage nHtaH H yuzmdzhno as a change in the frequency of the power supply unit 11-, and a change in the value of 1 | and 1 of the excitation current by the valves 7-10. In addition, the engine speed may

by adjusting the magnitude of the DC voltage with a controlled rectifier. By simultaneously adjusting the voltage and frequency of the power supply, it is possible to ensure optimum values of the efficiency and power factor of the engine. The reverse of the motor is carried out by changing the phase alternation of the winding 2 by a frequency and phase setting unit 11. The number of gates of the switch of the WFD can be reduced with an odd number of phases of the closed stator winding 2.,

The WFD can be used primarily as a traction motor of electric rolling stock of direct and alternating current, as well as in all other areas of the controlled electric drive.

Compared to a frequency-controlled three-phase short-circuited asynchronous motor, the WFD should have greater overload capacity and flexibility in controlling the rotational speed.

Claims (2)

Invention Formula A control method for a repulsive motor with a single-phase short-circuited rotor and a stator with a multi-sectional winding core consists of supplying control signals to two pairs of anti-parallel-connected valves connecting the terminals of the power supply to diametrically opposed winding terminals , due to the fact that, in order to improve the energy performance and the expansion of the field of application, simultaneously with the supply of the relevant control signals, control signals are sent ly on two pairs of valves connected to the terminals of the winding of the cores, shifted by 90 el. hail. ;. Information sources, taken into account during the examination I. Patent of Germany No. 1257956, cl. 21d2 41, 1968. 2. Patent of Germany No. 1 241 904, cl. 21 d 41, 1967., - ..