JPS59175369A - Synchro motor - Google Patents

Abstract

PURPOSE:To remove a defect caused by a spring unit by supplying a single phase AC current to a rotor winding for a synchro motor by a rotary transformer, thereby eliminating the spring unit. CONSTITUTION:A single phase AC current is supplied from a single phase AC power source 1 to the stator side winding T1 of a rotary transformer 8 connected to the power source 1. Thus, the prescribed single phase AC current is inducted at the rotor side winding T2 of the transformer 8 which is electromagnetically coupled with the winding T1, and the AC current is supplied to the rotor winding 2 for a synchro motor. In this case, since the windings T1, T2 are all composed of single phase windings, the transformer 8 operates as mere transformer, and no electric force is generated between the windings T1 and T2 as a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synchro motor, and more particularly to a synchro motor that can be applied to instruments that remotely measure the position (angle) of a rotating shaft, such as a rudder angle indicator and a wind vane.

In general, a synchro motor is a general term for special multi-phase rotating machines used to remotely measure or control the position (angle) of a rotating shaft.
) is commonly known as the ``Celsin'' motor, which is a product name of the company.

For example, remote measuring instruments such as rudder angle indicators and wind vanes are known in the marine vessel industry as devices that use this type of synchro motor for measurement purposes.

This type of remote measuring instrument usually uses a pair of synchronized motors for a transmitter and a receiver in combination, and when operating this, for example, as shown in Figure 1, a single synchronized motor is used as a power source. It is necessary to use a phase alternating current power supply 1 to supply single-phase alternating current to each of the rotor windings 2 and 2' for a pair of synchro motors. In this case, these single-phase alternating currents are e.g.
They are supplied to the rotor windings 2 and 2' through the coils ', 4', respectively.

In addition, in Figure 1, 5, 6.7 and 51, 61°7
' are three-phase stator windings on the transmitter side and the receiver side, respectively, and these windings are 5 and 5', 6 and 6', and 7 and 7', respectively, as shown in Figure 1. They are connected so that they have an in-phase relationship.

In the conventional synchronized motor as shown in FIG. 1, the single-phase AC power source 1 is supplied to each rotor winding 2 and 2' through the slip rings 3, 4 and 3', 4' as described above. Therefore, by the operation of the synchro motor, the cislino f rings 3, 4 and
, 4' may be worn or damaged, which tends to cause malfunctions, and it is therefore difficult to continue normal operation unless periodic maintenance and inspections are performed.

The present invention was proposed in view of the above circumstances, and its purpose is to eliminate the need for conventional slip rings, eliminate the need for maintenance and inspection, and maintain normal operation for a long period of time. We provide synchro motors that can.

A synchro motor according to the present invention includes a multiphase stator winding and a rotor winding for a synchro motor, and a rotary transformer provided between the rotor winding and a single-phase AC power supply, The stator side winding of the rotary transformer is connected to the single-phase AC power supply, and the rotor side winding of the rotary transformer is connected to the rotor winding of the synchro motor. This system supplies single-phase alternating current to the rotor winding of a synchro motor using a conventional slip ring, eliminating the need for a conventional slip ring and eliminating the occurrence of failures caused by this.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic connection diagram on the transmitter side of a synchro motor according to an embodiment of the present invention, and FIG. 3 is a schematic diagram showing the configuration of the synchro motor shown in FIG.

In FIGS. 2 and 3, the same parts as in FIG. 1 are designated by the same reference numerals and will be described. 1 is a single-phase AC power supply, 2 is a rotor winding for a synchro motor, 5.6.7 is a multi-phase stator winding for a synchro motor, and in this example, a three-phase stator winding.
Reference numeral 8 denotes a rotary transformer having no movable contact part, which is disposed between the rotor winding 2 and the single-phase AC power supply 1, and the stator side winding (-next winding) T+ is a single-phase AC power source. Connected to the power supply 1, the rotor side winding (secondary winding) of the rotary transformer 8 T! is connected to the rotor winding 2 for the synchro motor, and is configured to supply single-phase AC from the single-phase AC power supply 1 to the rotor winding 2 via the rotary transformer 8.

As shown in Fig. 3, three-phase stator winding 5 for synchro motor
．． 6 (7 is not shown) and the stator side winding T1 of the rotary transformer 8 are each wound around the stator core 9 of the synchro motor. Further, the rotor winding 2 for the synchro motor and the rotor side winding T2 of the rotary transformer 8 are wound around rotor cores 10 and 11 fixed to the rotary shaft (rotation shaft) 12 of the synchro motor, respectively. The rotary shaft 12 rotates integrally with the rotary shaft 12.

The connections, arrangement, configuration, etc. of the three-phase stator winding 5.6.7 and the rotor winding 2 described above are based on the rotary transformer 8 and the unit that supplies power to the rotor winding 2 using the rotary transformer 8. Since it has the same configuration as a conventional synchro motor except for the phase AC power supply circuit, the explanation thereof will be omitted.

Next, the operation of the above embodiment of the present invention will be explained.

In FIGS. 2 and 3, single-phase AC power is supplied from the single-phase AC power supply 1 to the stator side winding T1 of the rotary transformer 8 connected to the single-phase AC power supply 1. In FIGS. As a result, the rotor side winding T of the rotary transformer 8 is electromagnetically coupled to the stator side winding T1.
2, a predetermined single-phase alternating current is induced, and this single-phase alternating current is supplied to the rotor winding 2 for the synchro motor.

In this case, the stator side winding T! of the rotary transformer 8! Since the rotor side winding T2 and the rotor side winding T2 are both composed of single-phase windings, the rotary transformer 8 simply operates as a transformer, and there is no electric force between the windings Tl and T2 as a motor. (electric power) is not generated. Therefore, even if such a rotary transformer 8 is used, the function as a synchro motor is not hindered at all. Therefore, the synchro motor according to the present invention uses a movable contact section consisting of a conventional slip ring section to connect the rotor winding 2 to 2.
The synchro motor operates in exactly the same way as a motor that supplies single-phase alternating current to
Of course, the present invention is not limited to the phase and can also be applied to a normal multi-phase synchro motor.

According to the present invention, as a means for supplying single-phase alternating current from a single-phase alternating current power source to a rotor winding for a synchro motor, conventional Since a rotary transformer is used in place of the slip ring part, the conventional slip ring part is no longer necessary, and this slip ring part is prone to wear, damage, poor contact, etc., and due to these occurrences, it is difficult to use as a synchro motor. Since accidents such as interruption or stoppage of functions are eliminated, the reliability of the synchro motor is significantly higher than that of conventional motors.

Furthermore, the excellent effects of providing a synchro motor that does not require maintenance, inspection, etc. of the conventional slip ring portion and that can continue normal operation for a long period of time can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a schematic wiring diagram of a conventional synchro motor, Fig. 2 is a schematic wiring diagram of a synchro motor according to an embodiment of the present invention, and Fig. 3 is a schematic wiring diagram of a synchro motor of an embodiment of the present invention.
The figure is a schematic diagram showing the configuration of the synchro motor shown in the second figure. 1...Single-phase AC power supply, 2.2'...Rotor winding, 3
゜4, 3', 4'...Slip ring, 5.6
．． 7.5'. 6', 7'... Three-phase stator winding, 8... Rotating transformer, 9... Stator core, 10.11... Rotor core,
12... Rotating shaft, Tl... Stator side winding, Tl...
・Rotor side winding.

Claims (1)

[Claims] A stator side winding of the rotary transformer, comprising a multiphase stator winding and a rotor winding for a synchro motor, and a rotary transformer provided between the rotor winding and a single-phase AC power source. A synchro motor, characterized in that the rotor side winding of the rotary transformer is connected to the rotor winding for the synchro motor.