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Dynamo-electric machines and control and operating system for the same

a technology of dynamo-electric machines and operating systems, which is applied in the direction of dynamo-electric machines, electrical apparatus, control systems, etc., can solve the problems of affecting the operation of the commutator, causing disastrous sparking at the brush contact, and wearing at the receding edges of the commutator segments and at the trailing brush tips,

Inactive Publication Date: 2002-06-13
BLUM DIETER W
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This "short-circuited current", as it is called, can under some circumstances produce disastrous sparking at the brush contact.
If the commutation is not properly accomplished, this results in a. high voltage spike, which can cause sparking.
The effect of sparking is to cause wearing at the receding edges of the commutator segments and at the trailing brush tips.
Another method is to use commutating poles, which makes brush shifting unnecessary, since the proper commutating flux is brought to the short-circuited coil.
Thus, if the current reaches too high a level, it will burn out the motor.
However, since the rotational speed is very slow, and since power output equals force times distance, even though the torque is very high, the effective work done is rather low.
However, the wasted energy is extraordinarily high and this is being dissipated in rheostat.
Further there are practical constraints on the design of electric motors such as a maximum voltage levels imposed by certain design constraints, etc.

Method used

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  • Dynamo-electric machines and control and operating system for the same
  • Dynamo-electric machines and control and operating system for the same
  • Dynamo-electric machines and control and operating system for the same

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second embodiment

[0188] The switching arrangement of the present invention is disclosed in FIG. 17. Since there is, an even number of inductive armature coils, there will be more than one coil segment which is being switched at a given time. The voltage spike for each of these coil. segments will be opposite to one another. These two voltage spikes can thus be directed simultaneously into the power buses so that these effectively would balance each other without power loss.

[0189] In FIG. 17 there are shown eight separate switches designated A through G. There are eight coils, and each of the numbers 1 through 16 represent individual coil segments. The coil segments are diametrically opposite to one another. Thus, the segments 1 and 9 make up one coil, the segments 2-10 make up another coil segment, etc.

[0190] To describe the operation of the arrangement shown in FIG. 17, at anyone time one of switch assemblies (such as shown at 92 in the prior embodiment) has the positive switch made conductive, whi...

third embodiment

[0191] FIG. 18 shows the present invention, where the a stator of the motor 60a comprising two north poles and two south poles, and there are eighteen coils. The switching between the coils is accomplished in generally the same manner as illustrated in FIG. 17. The embodiment of FIG. 18 is shown to illustrate that the present invention can be embodied in a motor where there are multiple north and south poles.

[0192] FIG. 19 shows a fourth embodiment of the present invention. In this embodiment, there are six coils designated C-1b through C-6b. As in the first embodiment, there are switch assemblies 92, each having positive and negative switches 94 and 95. However, the individual coils C-lb through C6b are not connected to one another in series.

[0193] Rather, each end of each coil are connected to an individually related switch assembly 92.

[0194] Thus, in the operation of the embodiment of FIG. 19, each coil is made conductive by turning on the positive switch 94 of one of its related...

fifth embodiment

[0195] FIG. 20 shows the present invention where the concept of the present invention is adapted to a design related to a synchronous motor. In a synchronous motor, the flux field is developed through an AC current so that the flux field travels a circumferential path around the stationary outer member (the "stator").

[0196] In a conventional synchronous motor, the rotor positioned within the stator often simply has permanent magnets with the poles of the magnet being positioned adjacent to the rotating flux field so that the rotational movement of the flux field interacts with the poles of the rotor poles to 'ca use the rotor to rotate synchronously with the field traveling: around the circumference of the stator.

[0197] To incorporate the present invention in the basic design of a synchronous motor, the rotor, instead, of being provided as permanent magnets, is provided' with an armature made in accordance with the present invention having' the. switching and control assembly of the...

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Abstract

The dynamo-electric machine comprising a field member creating a flux field extending between magnetic pole portions. There is an armature assembly rotated in the machine comprising a core and a plurality of induction coils. There are switches mounted in the armature assembly so as to be rotatable therewith, and the switches are arranged to cause the current to flow selectively through the coils. By properly controlling the switches to control direction and timing of the current, the current flow in the coils can be optimized to accomplish desired power transfer.

Description

[0001] This application is a continuation of Ser. No. 09 / 561,352 filed Apr. 28, 2000, which is a continuation of Ser. No. 09 / 015,375 filed Jan. 29, 1998 (now U.S. Pat. No. 6,222,331, and claims priority benefit of U.S. Provisional Ser. No. 60 / 036,444 filed Jan. 29, 1997.[0002] a) Field of the Invention[0003] The present invention relates generally to electrical machines (which include both motors and generators), and more particularly to a system (apparatus and method) for providing power to the machine components and a control and operating system for the same. More particularly, this relates to such a machine and system which does not use brush commutation, and which provides optimized performance of the machine, and also enables the overall design of the machine itself to be improved for better performance.[0004] One of the more common electrical machines used for various industrial applications is the conventional commutator controlled DC motor having a stator with at least one ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02K21/28H02K23/00H02K23/04H02K29/00H02K29/06H02P23/00
CPCH02K21/28H02K29/06H02K23/04H02K23/00
Inventor BLUM, DIETER W.
Owner BLUM DIETER W