SU1339790A1 - Single-phase thyratron motor - Google Patents

Abstract

The invention relates to single-phase AC motors with a contactless switch and is designed to work in automation circuitry, telemechanics and devices that require a high range of rotational speed control, the ability to work in explosive environments, in vacuum, in devices that do not allow interference with radio reception. The purpose of the invention is the development of energy indicators. The magnetic excitation system of a rotating transformer is asymmetric, and the number of pairs of excitation poles of a contactless direct current motor is the same as that of a rotating transformer. 3 il. S (L co oo co; o o

Description

The invention relates to single-phase AC electric motors with a contactless switch and can be used in automation schemes, telemechanics, which require increased reliability, a wide range of speed control, ability to work in explosive environments, in vacuum, in devices that do not allow interference radio reception.

The purpose of the invention is to reduce the energy performance of an electric motor.

FIG. 1 shows the design of a single-phase valve motor; in fig. 2 is a circuit diagram of an electric motor; in FIG. 3 - graphs of voltages, currents and electromagnetic moment of the engine in the faction of the angle of rotation of the rotor.

The valve motor consists of a rotating transformer (VT),

Rem VT, disk 8 with a thyristor switch, a core of 10 EMPs installed in engine bearing shields.

The VT in the engine is intended for the contactless transfer of electromagnetic energy to the engine meter, matching the supply voltage C with the maximum allowable voltage Uj, and, for the EMI core, converting the angle of rotation of the rotor f to a voltage proportional to this angle.

The envelope EMF F removed from the winding 4 of the BT box repeats the shape of the field in the gap and is shown in FIG. 3 (the form of the EMF Br1 is given for the case of changing the field in the 5 gap by the sine law) In the interval, the angle is almost zero.

In the thyristor control winding 6 of the semiconductor switch 14 located in the same grooves as the operating winding 4 kor W, the emf is induced to control 10

semiconductor thyristor commutation - 2 ° lazy 1y, y, repeating emf 1g

torus and non-contact electromechanical converter (EMF). The rotating transformer (fig. 1) consists of a stator. 1 and rotor 2 selected from electrical steel sheets. On the stator of the VT, a single-phase winding 3 is connected, which is connected to a single-phase AC network with a voltage and a frequency of 1, creating one pair of poles of an alternating magnetic field. Winding 3 can be performed} 1epa centered on clearly expressed magnetic poles or distributed across the stator slots and occupies the useful stator volume within.

In the rotor slots, the secondary working windings 4 and 5 of the BT core and the windings 6 and 7 of the thyristor control of the semiconductor switch are located. The pitch of the windings of the core is equal to or less than the diametral with respect to the magnetic excitation system of the VT. In the general case, the number of windings can be w, the secondary working windings 4 and 5 of the core are closed to thyristors operating in key mode (Fig. 2). The control windings 6 and 7 are connected via diodes to the thyristor control circuits. A semiconductor thyristor switch consisting of thyristors and diodes is mounted on a disk 8 fixed on the motor shaft 9.

The EMF consists of a core 10 and a bipolar stator 11. The package EMF core is made up of electrical steel sheets. A winding of 12 boxes of EMF, laid in the slots of the core and having a diametrical pitch, is connected to the working windings 4 and 5 of the BT box. The number of windings of the core EMF is half the number of secondary working windings of the core BT.

At the poles of the EMF stator there are excitation windings 13, which create one pair of poles of a constant magnetic field. Shaft 9 with ko25

thirty

35

(Fig. 3), which through diode 15 is applied to the thyristor control transition 14.

When the values of EMF 24 and (2b, the last opens and passes half voltaic for opening the thyristor 14, rectified voltage UM. The thyristor 14 closes when the EMF 1 passes through zero. The opening of the thyristor 14 occurs at EMF values Em and, respectively, the voltage U,., close to zero

The thyristor 14 transmits a certain number of unipolar DC pulses, which depends on the rotational speed of the rotor of the valve motor and the frequency f., Of the supply network.

In this case, a half-wave rectified current Izi flows through the winding of the EMF core, and in the first approximation follows the shape of the voltage curve Uj.,.

When current interacts with a constant magnetic flux 0 (Fig. 3), the excitation of a contactless DC motor produces an electromagnetic torque of a valve motor that operates within a rotor angle of 0-180 °.

Within the rotor rotation angle of 180- 360 °, a half-wave rectified current flows in the reverse direction across the winding of 12 core EMF. The current I is due to the action of the emf removed from the secondary winding of the 5 core box VT when the semiconductor switch is open thyristor 16, due to the voltage on the controlled winding 7 of the valve motor, which through diode 17 is applied to the thyristor control transition 16.

Thus, a unidirectional electromagnetic moment acts within a complete revolution on a valve motor rotor.

45

55

Rem VT, disk 8 with a thyristor switch, a core of 10 EMPs installed in engine bearing shields.

The VT in the engine is intended for the contactless transfer of electromagnetic energy to the engine meter, matching the supply voltage C with the maximum allowable voltage Uj, and, for the EMI core, converting the angle of rotation of the rotor f to a voltage proportional to this angle.

The envelope EMF F removed from the winding 4 of the BT box repeats the shape of the field in the gap and is shown in FIG. 3 (the form of the EMF Br1 is given for the case of changing the field in the gap according to the sine law). In the interval, the angle is almost zero.

In the thyristor control winding 6 of the semiconductor switch 14 located in the same grooves as the operating winding 4 of the VT core, an emf of control is induced

Sloppy 1y, y, repeating form EMF 1g

° Laziness 1y, y, repeating form EMF 1g

five

0

five

(Fig. 3), which through diode 15 is applied to the thyristor control transition 14.

When the values of EMF 24 and (2b, the last opens and passes half voltaic for opening the thyristor 14, rectified voltage UM. The thyristor 14 closes when the EMF 1 passes through zero. The opening of the thyristor 14 occurs at EMF values Em and, accordingly, the voltage U,., close to zero.

The thyristor 14 transmits a certain number of unipolar DC pulses, which depends on the rotational speed of the rotor of the valve motor and the frequency f.

In this case, a half-wave rectified current Izi flows through the winding of the EMF core, and in the first approximation follows the shape of the voltage curve Uj.,.

When current interacts with a constant magnetic flux 0 (Fig. 3), the excitation of a contactless DC motor produces an electromagnetic torque of a valve motor that operates within a rotor angle of 0-180 °.

Within the rotor rotation angle of 180- 360 °, a half-wave rectified current flows in the reverse direction across the winding of 12 core EMF. The current I is due to the action of the emf removed from the secondary winding of 5 kor W with the thyristor 16 of the semiconductor switch open, due to the voltage on the controlled winding 7 of the valve motor, which through diode 17 is applied to the thyristor control junction 16.

Thus, a unidirectional electromagnetic moment acts within a complete revolution on a valve motor rotor.

five

five

core, power sensor transformer serving for supplying electrical energy to the winding core and located with axial displacement relative to the electromechanical transducer, including the stator, on which the single-phase primary winding is located, and the rotor, which is mechanically connected to the rotor of the electromechanical transducer, on the rotor

If the electromagnetic moment M (Fig. 3) is greater than the moment of resistance on the shaft, the rotor of the valve motor comes into rotation.

The design of the valve motor allows increasing the energy performance and extending the rotational frequency control range due to the opening of the thyristors 14 and 16 of the semiconductor switch being made in a shielded Q transformer with a 2p coil voltage range of the secondary winding connected

and Ui5 and U, respectively, while maintaining through control valves to the corneal length of packs of the impulse winding of an electromechanical conversion current in the windings of the EMI core of the picker, and the secondary control windings also simplify the design of the VT due to the ki laid in the same grooves that and power reduction of the number of its poles of the exciter-15 windings, and connected to the control and downside valves and gates, characterized in that

In order to improve the energy performance of the invention, the rotating transformer is made with p pairs of poles, poles on which

Single-phase valve electric motor-20 is the primary winding, the body is shifted, containing an electromechanical 2p- in each pair at an angle of less than 360 / 2p el. a pole converter, including in hail, the secondary winding coils will perform a stator, on which the source is located with a step smaller than 180 el. hail, and the magnetodirectional magnetizing force, the filament axes of the coils are shifted by the angle and the rotor, on which the winding is located, 180 el. hail.

core, power sensor transformer serving for supplying electrical energy to the winding core and located with axial displacement relative to the electromechanical transducer, including the stator, on which the single-phase primary winding is located, and the rotor, which is mechanically connected to the rotor of the electromechanical transducer, on the rotor

transformer disintegrated 2p coils power secondary winding connected

1

and

e

FIG. g

h I about

25

25 o

Claims (1)

Claim A single-phase valve motor containing an electromechanical 2-pole converter, including a stator on which a source of unidirectional magnetizing force is located, and a rotor on which the armature winding is located, a power transformer sensor used to supply electrical energy to the armature winding and located with axial displacement relative to an electromechanical converter comprising a stator on which a single-phase primary winding is located, and a rotor that is mechanically connected with the rotor of the electromechanical converter, on the rotor of the transformer there are 2r coils of the power secondary winding, each connected via controlled valves to the anchor winding of the electromechanical converter, and secondary control windings laid in the same grooves as the power 5 windings, and connected to the control circuits of the valves, characterized in that, in order to increase energy performance, the rotating transformer is made with p pairs of poles, the poles on which q the primary winding is located are displaced in each doy pair at an angle less than 360 / 2p el. hail, coils of the secondary windings are made in increments of less than 180 el. hail., and the magnetic axis of the coils are offset by an angle of 180 el. hail. FIG. 2