JPS59165941A - Inverter drive rotary electric machine - Google Patents

Abstract

PURPOSE:To efficiently dissipate heat generated in a main circuit of an inverter by mounting the inverter on the outer frame of a rotary electric machine, and using a cooling heat sink as the outer frame of the machine. CONSTITUTION:A converter section 9 as a main heat generator of an inverter 2 and a main element of an inverter section 10 are mounted on the outer frame 12 of a squirrel-cage motor 1. The motor 1 and the main elements 9, 10 of the inverter 2 are cooled by the frame 12. Further, since the frame 12 is cooled by a cooling outer fan 14 which is mounted on a rotational shaft of the motor 1, the elements 9, 10 of the inverter 2 are efficiently cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Utilization of the invention] The present invention relates to a rotating electric machine driven by an inverter.

rPrior art] An inverter is an electric variable speed motor (
Compared to standard cage forming motors (such as eddy current joint motors, tortoise pressure control motors, etc.), the dimensions are very large and the structure is complex, making maintenance and inspection difficult.Also, due to slip control, efficiency at low speeds is low. Additionally, among rotating electric machines, there is an increasing demand for simple and inexpensive FX that has a single structure and can be used to efficiently change speeds as is.

FIG. 1 is a diagram showing a conventional example of a method of changing the speed of a cage-shaped electric car using an inverter, in which a car-forming motive 1 and a commercial power supply are connected to a device that generates a variable voltage and a variable frequency to change the speed of the car-forming motive, that is, an inverter 2. A terminal block 3 provided inside the inverter 2 and a terminal block 4 provided on the outer frame of the car forming motive device 1 are connected by a connecting cable 5.

On the other hand, the commercial power source is connected to a terminal block B provided inside the inverter 2 through a connection couple 6.

That is, commercial power is supplied via the cable 5.6 through the inverter 2 to the car forming motor 1 so that a variable voltage and variable frequency can be applied to the car forming motor 1 to arbitrarily change the speed.

On the other hand, FIG. 2 shows a conventional example of an inverter that controls the car forming motive to a desired speed. As shown in Figure 2, the inverter consists of a main circuit 7 and a main control circuit 8. Converter section 9 that constitutes the main circuit in this inverter
The heat generated in the main elements of the inverter Hi+)+1 is large, and cooling of these main elements 9 and 10 is particularly difficult. Poster color.

Since the conventional bottle-carved, cage-shaped drive unit 1 and the inverter 2 are separated, the cable arrangement process is large, and the inverter 2 is connected to the cooling heat sink 11 and the connection terminal block 6. In addition to the large number of parts and large dimensions, the price is high.
It had the disadvantage that it required a mounting space that would make the inverter 2 miserable.

``Object of the Invention'' The present invention has been made in view of the above-mentioned conventional problems, and its object is to construct an inverter-driven rotary machine that improves the cooling effect as described above. .

[Summary of the Invention] In other words, in the present invention, an inverter is attached to the outer frame of the rotating machine, and serves as a cooling heat sink and the outer frame of the rotating machine.
Heat generated in the main circuit of the inverter is effectively dissipated.

``Example of the invention'' Next, an example of the implementation of the present invention will be explained with reference to FIG. Same as before.

The present invention is characterized in that the cooling heat sink 11 of the inverter 2 and the outer frame 12 of the force/row forming machine are used to cool the cage forming machine 1 and the inverter 2 as one unit.

That is, the converter section 9 as the main heat generating section of the inverter 2, the main elements of the inverter section 10, etc.
The outer fan 14 for cooling is attached to the outer frame 12 of the machine 1, and the outer frame 12 cools the car forming machine 1 and the main elements 9,100 of the inverter. Since the nuclear outer frame 12 is cooled by this, the main elements 9 and 10 of the impark 2 can be cooled with good dynamic strain.

Further, the wire for supplying power from the inverter 2 to the squirrel-cage city engine 1 is connected by a short lead signal 12 from the inverter 2.

If the evaporation part of the heat vibrator 2 [] is identified as the high-temperature part of the inverter 2, and the pseudo-condenser b is placed in the ventilation path of the external cooling fan 1A, the cooling efficiency of the inverter will be further increased.

〔Effect of the invention〕

As a result, the converter noise of the conventional inverter 2 and the cooling effect of the main elements of the inverter section are improved.

[Brief explanation of drawings]

Fig. 1 is a conventional example of a converting furnace method using an inverter as a motive for forming a cage, and Fig. 21 is a perspective fat side view showing the structure of a conventional inverter. He is a prisoner.

Claims (1)

[Claims] 1. Attaching heat-generating parts of an inverter to the outer frame of a rotating electric machine,
An inverter and a drive rotation shaft, characterized in that a cooling fan is attached to the rotating shaft of the rotary electric machine, the cooling fan being sent to the direction where the heat-generating parts of the rotary electric machine and the inverter are located. 2. Self-driven rotation of the inverter as set forth in claim 1, characterized in that a heat pipe evaporation section is fixed to the outer frame of the inverter, and a pseudo-condensation section is located in the ventilation passage of the cooling fan. Nariso.