JPS6245494Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ultra-slim submersible motor using a non-commutator motor, and its purpose is to improve the wiring structure of motor lead wires.

A submersible motor that uses a non-commutator motor can easily achieve high-speed rotation of 6,000 to 10,000 rpm, which is difficult to achieve with an induction motor, and therefore the connected submersible pump can obtain high pressure and high water volume even if the impeller is small. This makes it possible to manufacture pumps with a narrow outer diameter.

On the other hand, commutatorless motors require a dedicated drive circuit due to their configuration, and the drive circuit must be integrated with the motor.
The most rational design for constructing an ultra-slim submersible motor is when the motor section and pump section are arranged in this order.

However, the drawback of this method lies in the handling of the lead wires. In other words, power is supplied from the ground power source to the motor section via a cable, and the cable and motor lead wire are connected at the top of the motor section.
In general, when an induction motor is used, the power is emitted from the upper part of the stator coil end, but since a commutatorless motor is a system in which the power is directly supplied to the drive circuit, when arranged in the above configuration, the motor lead The wire must leave the drive circuit and pass through or outside the motor section to its connection with the cable provided on the top of the motor section.

If the outer diameter of the motor is large, or if there is a large difference between the outer diameter of the motor and the inner diameter of the well, holes or recesses can be provided inside and outside the motor part for the motor lead wires to pass through. When it comes to ultra-slim submersible pumps, due to physical, electrical, and magnetic constraints,
It becomes impossible to provide holes and recesses as described above inside and outside the motor section.

The present invention overcomes the above-mentioned problems and makes it possible to manufacture an ultra-slim submersible motor using a non-commutator motor in which a drive circuit is integrated.

An embodiment of the present invention will be described below with reference to the accompanying drawings. In Fig. 1, 1 is a pump section, 2 is a motor section, and 3 is a drive circuit section, which are installed coaxially and lead from a motor coil 5 wound around a stator 4 to the drive circuit section 3. A line 6a is wired. On the other hand, the lead wire 6b for obtaining power to the drive circuit section 3 comes from the drive circuit section 3 and is connected to the slot 9 of the stator 4 as shown in the cross-sectional view of FIG.
It passes through the stator 4 and is connected to the power supply cable 8 at the upper end plate 7 of the motor section 2 .

By arranging the motors as described above, it is possible to effectively utilize the limited space of the ultra-slim motor for wiring.

At this time, the lead wire 6b passing through the stator may be a single core if the amount of winding is large as shown in the cross section of the stator in FIG. 2, but if the amount of winding is relatively small,
As shown in Fig. 3, if a parallel wire 6c made of two or more wires arranged in one piece or a ribbon wire 6d made of a plurality of single wires heat-pressed in parallel is used, the coil 5 will protrude from the slot 9 toward the inner diameter side. 10 wedges to prevent
It will also play the role of Furthermore, if a flexible printed cable 6e with insulation on both sides as shown in FIG. 4 is used for the lead wire, in addition to ordinary stranded wire, it will not only be effective as the wedge 10 described above, but also have the advantage of being thin and wide. It can also be used to double as the status slot insulation 11.

As is clear from the above description, according to the present invention, a space for passing the lead wire through can be obtained without reducing the magnetic path of the stator, and manufacturing of an ultra-slim submersible electric motor can be extremely simplified.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an ultra-slim submersible electric motor according to one embodiment of the present invention, Fig. 2 is a sectional view of the motor section of the same submersible electric motor, and Figs. 3 and 4 are sectional views of another embodiment of the present invention. It is a sectional view for explanation. 2... Motor section, 3... Drive circuit section, 4... Stator, 6b to 6e... Motor lead wire, 9...
Slot.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a submersible electric motor in which a pump part, a motor part consisting of a non-commutator motor for driving this pump part, and its drive circuit part are sequentially coaxially arranged and combined into one, the drive circuit An ultra-slim submersible electric motor characterized in that a motor lead wire connected to the motor is passed through the status slot of the motor and pulled out to the top, and connected to a power supply cable introduced from the pump side. 2. The motor lead wire is a ribbon wire made into a flat shape by thermo-compression bonding of a plurality of insulators, or
The ultra-slim submersible electric motor according to claim 1, which is a registered utility model, characterized in that it is constituted by a parallel electric wire formed by integrally forming a plurality of core wires into a flat shape. 3. The ultra-slim submersible electric motor according to claim 1, wherein the motor lead wire is made of a flexible printed cable.