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Innovative Electrical Machines

Electrical machines have a wide range of applications. The variability in their sizes, flexibility of use and high efficiency confers several advantages for their use in vehicles, generation of renewable energy e.g wind power generators, aircrafts, automations, domestic appliances etc.

The Electrical Machinery Equipment Industry wants to make India the country of choice for the production of electrical equipments and has a set target of USD 100 billion. To achieve the target, the Electrical Machinery equipment industry of India is focusing on Research & Development; lowering of custom duties on a range of equipments; setting up of the Electrical Equipment Skill Development Council (EESDC);  the establishment of electrical equipment industry clusters; the enhancement of product-testing infrastructure in the country; an increase of shares in the export market and financial support.

Indian manufacturers are becoming more competitive with respect to their product designs, manufacturing and testing facilities. The market-oriented reforms and huge demand for power generation and transmission will increase the demand for electrical machinery in future.

With a large pool of available human resources, adequate workforce, increasing scope of direct exports to neighbouring countries, Indian Electrical Machinery Equipment Industry is a favourable investment destination. Moreover, delicensing of electrical machinery industry by the government has facilitated the entry of major global players in India.

Factors fueling to the growth of Electrical Machinery Industry:

  • Capacity creation in sectors such as infrastructure, power, mining, oil and gas, refinery, steel, automotive and consumer durables.
  • Significant Business opportunities due to nuclear capacity expansion.
  • Rapid increase in infrastructure investment and industrial production.

The research works in the industry are aimed at developing innovations that widen the applications of electrical machines and improve their efficiency. The recent patents filed in the Electrical machinery industry in India are:

201717024825

Title: ELECTRIC MACHINE STATOR WITH LIQUID COOLED TEETH

Assignee: PRIPPELL TECHNOLOGIES LLC

Publication Date: 13 Aug 2017

Abstract:

A system for cooling the teeth of an electric machine stator. The stator includes a stator core that may be formed of a plurality of laminations. Each lamination has a plurality of back iron apertures a plurality of tooth tip apertures and a plurality of elongated apertures. When the laminations are assembled to form the stator core the back iron apertures align to form back iron inlet channels and back iron outlet channels and the tooth tip apertures align to form tooth tip cooling channels. The elongated apertures are L shaped and connect the back iron inlet channels and back iron outlet channels to the tooth tip channels. Cooling fluid may flow for example axially through a back iron inlet channel azimuthally and radially inward through an elongated aperture to a tooth tip axially along a tooth tip channel and to a back iron outlet channel through another elongated aperture.

2). 201737019753

Title: ELECTRICAL ROTATING MACHINE WITH ONE SIDED COOLING AND METHOD FOR ONE SIDED COOLING

Assignee: SIEMENS AKTIENGESELLSCHAFT

Publication Date: 15 Sep 2017

Abstract:

The invention relates to an electrical rotating machine comprising a stator (1) a rotor (8) and a turbomachine (7) which is provided to cool the electrical rotating machine on the one side wherein the stator (1) comprises a laminated stator core (2) a front stator winding head (5a) and a rear stator winding head (5b) wherein the rotor (8) comprises a rear rotor winding head (6b). In order to improve cooling during the one sided ventilation in particular with respect to the prior art with regard to a uniform temperature distribution it is suggested that the laminated stator core (2) comprise channels (9a 9b) extending in the axial direction which are provided to cool the rear stator winding head (5b) with a second cooling air flow (14) generated by the turbomachine (7) wherein at least one first channel (9a) is provided to guide a second cooling air flow (14) generated by the turbomachine (7) through the laminated stator core (2) to the rear stator winding head (5b) wherein an air guide (4) which is fastened to the laminated stator core (2) on the side of the rear stator winding head (5b) is provided to bypass the second cooling air flow (14) via the rear stator winding head (5b) wherein at least one second channel (9b) is provided to guide the second cooling air flow (14) back from the rear stator winding head (5b) through the laminated stator core (2) wherein at least two radial slits (11) arranged in the axial direction which are arranged radially between the channels (9a 9b) running in the axial direction and an air gap (3) between the laminated stator core (2) and the rotor (8) and are connected to each other are provided to cool the laminated stator core (2) in particular the stator windings and/or the rear rotor winding head (6b) wherein the axial distance between the radial slits (11) to the side of laminated stator core (2) which faces away from the turbomachine (7) is reduced and is provided to compensate for a temperature gradient caused by one sided cooling.

3). 201717015346

Title: ELECTRICAL MACHINES WITH SMC CORES

Assignee: GKN SINTER METALS ENGINEERING GMBH

Publication Date: 13 Oct 2017

Abstract:

An electrical machine is disclosed. The electrical machine has a first part and a second part the first part moveable relative to the second part. One of the first part and the second part has a plurality of cores for current carrying windings. Each core is of soft magnetic composite material (SMC) and is shaped to be no wider at its ends than along its length

4). 201717002556

Title: ELECTRICAL MACHINE

Assignee: LIMANSKIY Valentin Grigoryevich

Publication Date: 9 June 2017

Abstract:

The invention described herein belongs to the category of electric motors and power generators and may be used, in particular, to generate electric and mechanical energy. The objective of the invention described herein is to expand the area of application, to reduce costs and to increase the specific power and efficiency of the electric machines. This electric machine comprises a rotor and a stator with winding coils and a control device. Stator winding coils are made as a system of radial and/or tangential coils connected in series and/or back-to-back; each coil has its own electric terminals. The control device can connect its electric contacts to the terminals of the corresponding stator winding coils in order to provide a chain control of electric current supply to the corresponding stator coils and thus to create, at each point in time, a pre-determined stator magnetic field in the electric machine, whether a rotating or a reciprocating one, depending on the spatial position and the magnetic condition of the rotor that performs rotating or reciprocating motions. The invention can be applied in the power industry, the transport industry, mechanical engineering, the construction industry, astronautics, and other fields of technology.

5). 201627034515

Title: ELECTRIC MACHINE

Assignee: FEAAM GMBH

Publication Date: 28 Oct 2016

Abstract:

Disclosed is an electric machine comprising a stator (1) and a rotor (21) that is mounted so as to be movable in relation to the stator the stator being provided with a plurality of slots (2) for receiving a stator winding. Exactly one conductor portion (3) of the stator winding is inserted into each slot. The conductor portions (3) are mutually short circuited in a short circuiting means on a first side (5) of the stator and are made as a single piece with said short circuiting means. On a second side (6) of the stator the conductor portions (3) are each connected to a terminal of a power supply unit (8) supplying adequate phase currents.

6). 201637027428

Title: ELECTRICAL MACHINE HAVING A FRAME AND SLEEVE

Assignee: SIEMENS AKTIENGESELLSCHAFT

Publication Date: 4 Nov 2016

Abstract:

The invention relates to an electrical machine (1) comprising a rotor (4) which is rotatably mounted around a rotation axis (5) extending in the axial direction (3) in bearing devices (16 17) a stator (7) having two axial ends an air gap between rotor and stator an interior chamber (10) encompassing the stator (7) and rotor (4) a sleeve (11) encompassing a first part (111) which encloses the interior chamber (10) a frame (12) having a first (123) and a second (121) longitudinal support (123) a first (122) and a second (124) cross support and a dividing device (2) on the frame (12). The stator (7) comprises a fastening device (15) for connection to the frame (12) and the dividing device (2) can make the interior chamber accessible from the outside in a plane parallel to the frame (12). The invention further relates to a collection to a frame (12) to a sleeve (11) or to a service or production method of such an electrical machine (1).

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