SU736285A1 - Power-diode electric motor - Google Patents

Description

The invention relates to electrical engineering. A valve electric motor is known in which each section of the core winding is connected to a power source using a push-pull magnet-transistor switch containing two transistors and one transformer 1. . This key is controlled by periodically saturating the rotation of the rotating permanent magnet Drossel, the winding of which is connected in parallel to one of the transformer windings. The disadvantage of such an electric motor is its complexity and high cost, which is caused by the need to have double the number of transistors, and the low reliability of this electric motor is caused by the poor start of the key. Also known is a valve electric motor containing a synchronous machine, at least one section, the main winding of which is connected to a power source using a transistor switch with a control circuit and according to series-connected primary windings of two transformers, the secondary windings of which are connected in antiphase between the winding of the master oscillator HHoro voltage and control circuit of the transistor switch. The transistor keys are controlled by signals from the sensitive elements of the rotor position sensor with a variable value of the electrical parameter of the sensitive element 2. Such an electric motor is closest to the invention in its technical essence and the achieved result. The motor provides proportional load current control to the switch transistors over the entire load change range. The control of the transistor from the rotor position sensors requires additional power, which reduces the energy performance of the electric motor and, in addition, this electric motor is rather complicated. An additional source of alternating voltage and rectifying devices are required to power the sensing elements of the sensor, for example, the inductor chokes.

The purpose of the invention is to simplify the valve motor and increase its energy performance.

This is achieved by the fact that in a valve motor containing a synchronous machine, at least one section of the core winding of which is connected to a power source using a magnetotransistor key containing a triode and two current transformers, the primary windings of which are connected in series and the secondary windings in antiphase are included between the secondary winding of the matching current transformer of the master alternating voltage generator and the control circuit of the magnetotransistor switch, sensitive element The sensors of the rotor position is connected in parallel the series-connected secondary winding of the matching transformer and oscillator TdKa secondary windings of transformers.

The triode of the magnetotransistor key can be made composite of at least two transistors with separate collector circuits, and the collector circuit of the additional transistor is connected to the power source through a separate core section

FIG. 1 shows schematically a single-section valve motor with a magnetotransistor switch made according to a mid-point control circuit; in fig. 2 - the same, fid with a magnetotransistor key, made according to a bridge control circuit; in fig. 3 - the same, but with a magnetotransistor key, made according to the circuit of the triode.

The valve motor comprises a synchronous machine 1 with a rotating inductor, for example, a permanent magnet 2, the core 3 of whose core winding is connected to the power source 4 by means of a transistor switch 5 with a control circuit 6 and according to serially connected primary windings 7 and 8 of two transistors 9 and 10, the secondary windings 11 to 12 which in antiphase are connected between the winding 13 of the master oscillator 14 of the alternating voltage and the control circuit 6 of the transistor switch 5. The gate electric motor also contains a sensor across the rotor comes to life with a sensitive element with a variable value of an electrical parameter, for example, a saturation throttle 15, the winding 16 of which is connected in parallel to the serially connected winding 13 of the master oscillator 14 and the secondary windings 11 and 12 of transformers 9 and 10. a field of a permanent magnet 17 mounted on the shaft of a synchronous machine. Chain

control transistor switch with a midpoint (see Fig. 1 and 3) contains diodes 18 and 19.

In FIG. 3, the transistor switch is made according to the composite triode scheme - from two transistors 20 and 21 with separate collector circuits connected to the power supply 4 using separate sections 3 and 22 of the core winding, one directly, and the other through the primary windings 7 and 8 transformers 9 and 10. The primary windings 7 and 8 of transformers 9 and 10 can be installed in the circuit of section 22 of the core winding. Resistors 23 and 24 are needed for recording transistors.

Periodically, as a function of the angle of rotation of the rotor, the switching on and off of the sections of the main winding of a valve electric motor is carried out as follows.

In the position when the permanent magnet 17 of the rotor position sensor does not saturate the choke 15, section 3 (as in Fig. 3 and section 22) is connected to source 5 of power. The large inductive resistance of the winding of 16 droplets 15 has practically no effect on the operation of the magnetic transistor switch. A current proportional to the current in section 3 of the core winding of the synchronous machine 1 flows through the base circuit of transistor switch 5. The idle current flows through the winding 16 before it reaches 15, because its winding data is selected from the voltage unsaturated to the winding 16.

If the permanent magnet 17 of the rotor position sensor saturates the choke 15, then the inductive resistance of the winding 16 becomes almost zero. The resistance of the winding 16 is disproportionately less than the equivalent input resistance in

control circuit of the transistor switch 5. The control circuit of the transistor switch 5 turns out to be shunted by a winding of 16 degrees 15. Transistor switch 5 starts to lock.

The current in the circuit of its collector and the primary windings 7 and 8 of transformers 9 and 10 decreases. Since there is a positive feedback between windings 7 and 8 and 11 and 12 of transformers 9 and 10, the current in the circuit of windings 11 and 12 is proportional. The process is avalanche-like. At the end of the process, transistor switch 5 is completely locked by resistor 23 (and in Fig. 3 and

resistors 24). In the circuit of the windings 11, 12,16 and 13 flows the no-load current of the windings 11 and 12 of the transformers 9 and 10, which can be chosen as small as desired. Section 3 (in FIG. 3 and

section 22) winding core valve

Claims (1)

Claim 1. A valve motor containing a synchronous machine, at least one section of the anchor winding of which is connected to a power source using a magnetotransistor switch containing a triode and two