RU12633U1 - VENT MOTOR - Google Patents

Abstract

A valve motor containing a rotor, a stator with an armature winding, sections of which are connected to the outputs of a bridge semiconductor switch, including transistors, the control electrodes of which are connected to the outputs of the rotor position sensors, and a diode bridge connected to the transistor, characterized in that the stator is made with a variable the radius of the inner bore on each pole arc.

Description

6. IPC HO2K29 / 02

Valve motor

The utility model relates to the field of electrical engineering, and can be used, for example, in regulated and unregulated power electric drive systems.

Known valve wire according to the patent of the Russian Federation No. 107 5901 MKI NO2K29 / 06, which contains a rotor, a stator with an armature winding, sections of which are connected to the output of a bridge semiconductor switch, including transistors, control eleurrodes of which are connected to the outputs of the rotor position sensor, as well as a diode bridge and power transistor.

The disadvantage of this technical solution is the complex scheme of starting the electric motor in the desired direction of rotation, which reduces its reliability.

The purpose of the utility model is to increase the reliability of the design, due to the simplification of motor control at the time of start-up.

To achieve this goal in an engine containing a rotor, a stator with armature windings, sections of which are connected to the output of a bridge semiconductor switch, including transistors, the control electrodes of which are connected to the outputs of the rotor position sensors, as well as a transistor connected to a diode bridge, a new feature is additionally introduced namely, the stator is made with a variable radius of the internal bore on each pole arc.

The implementation of the stator with a variable radius of the internal bore on each pole arc of the stator, due to the resulting magnetic asymmetry

allows you to set the desired direction of rotation, which simplifies the control of the motor at the time of start-up and increases its reliability.

Figure 1 presents the functional diagram of the electric motor.

Figure 2 presents the sheet of the stator package.

On Fig.3 presents a diagram of the core semiconductor switch.

Figure 4 presents the power source.

The valve electric motor comprises a working rotor (1) with permanent magnets with rare-earth elements of opposite directions, made in the form of segments attached to the shaft and rigidly fixed by retaining rings of non-magnetic material; the laden stator (2) is made with a variable radius of the internal bore on the cahadi pole arc of the stator (Fig. 2) to create magnetic asymmetry, the stator (2) has t-phase windings of the armature (3), the sections of which are connected to the outputs of the bridge semiconductor switch (4) ), which is intended for switching the operating current in the armature winding (3) of the stator (2). The switch (4) has two arms, each of which includes two SWT transistors (5), which are the executive elements of the bridge semiconductor switch (4) and are designed to change the direction of the current in the winding of the armature (2) of the stator (3). The control electrodes of the IGBT transistors (5) of the bridge semiconductor switch (4) are connected to the outputs of the rotor position sensor 6, which is designed to provide control signals to the control system depending on the position of the rotor. The rotor position sensor (6), designed to issue control signals to the control system, depending on

position (6) of the rotor (1). The position sensor (6) of the rotor (1) is made in the form of a motionlessly mounted clip based on Hall sensors and interact with the permanent magnet of the rotor (1). A transistor (7) operating in the pulse width modulation (PWM) mode as a function of the load of the valve motor and a diode bridge (8) is included in the shoulder circuit of the bridge semiconductor switch (6).

To power control elektrogrodov (5) IGBT transistors and

Sensing elements of the position sensor (6) of the rotor (1) a low-voltage power supply 9 is installed.

The power source (9) is assembled according to a bridge circuit with external excitation and consists of a master oscillator (10), a pulse shaper (11). The load of the pulse shaper is a transformer (12) with galvanically isolated t-outputs 13 (U1, U2, ... U5) made on RC 14 filters.

The control electrodes of the IGBT transistors and the inputs of the position sensors (6) of the rotor (1) are powered from the common conclusions of the galvanically isolated outputs 13 (U1, U2, ... U5) of the power source (9). And at the input of the switch, through the diode bridge (8), a network voltage of 50 Hz is supplied.

Depending on the position of the rotor (1), the control voltage from the output of the position sensors (6) of the rotor (1) is supplied to the gates of the IGBT transistors (5) of any of the diagonals of the bridge semiconductor switch (4). The control voltage is supplied to the control electrodes of the transistors (5) in such a way that the negative terminal U1, U2, ... U5 of each galvanically isolated power source (9) is common to the rotor position sensor (6) and the emitter of the corresponding transistor (5).

The electric motor works as follows: from the output of RC 14, voltage is supplied to the position sensors (6) of the rotor (1) and to one of the arms of the transistor etching electrodes (5) of the bridge semiconductor switch (4). At the same time, voltage is applied to the input of the semiconductor switch (4) through the diode bridge (8), preparing the power circuit of the stator winding (3) (2). If there is a signal from the position sensor (6) of the rotor (1), IGBT transistors (5) are opened, which are included in one of the arms of the semiconductor switch (4). Mains voltage through the diode bridge (8), through open transistors (5) on the winding section (3) of the stator (2), according to the 1st, Fya rotor starts to rotate.

Starting torque, due to the fact that the stator is made with a variable radius of the bore, is directed towards decreasing the air gap between the rotor (1) and the stator (2). The rotation of the engine occurs in a given direction. When the permanent rotor magnet (1) approaches the next stator pole (2) according to the signals of the rotor position sensor (6), the current I of the armature section of the armature winding (3) of the stator (2) is switched so that

Mer) - (- Фя) the moment of rotation does not change its sign.

When the refusal current exceeds the specified value, the engine current limiting system is activated, consisting of a transistor (7) and a PWM, while the effective voltage value in the diagonal of the semiconductor switch (4) decreases and, therefore, the effective current flowing through the armature winding (3) of the motor decreases , the engine torque decreases and as a result, the engine carries less load.

Claims (1)

A valve motor containing a rotor, a stator with an armature winding, sections of which are connected to the outputs of a bridge semiconductor switch, including transistors, the control electrodes of which are connected to the outputs of the rotor position sensors, and a diode bridge connected to the transistor, characterized in that the stator is made with a variable the radius of the inner bore on each pole arc.