CZ2012312A3 - Compact power unit - Google Patents

Compact power unit Download PDF

Info

Publication number
CZ2012312A3
CZ2012312A3 CZ20120312A CZ2012312A CZ2012312A3 CZ 2012312 A3 CZ2012312 A3 CZ 2012312A3 CZ 20120312 A CZ20120312 A CZ 20120312A CZ 2012312 A CZ2012312 A CZ 2012312A CZ 2012312 A3 CZ2012312 A3 CZ 2012312A3
Authority
CZ
Czechia
Prior art keywords
drive unit
electric motors
switched
compact
rotors
Prior art date
Application number
CZ20120312A
Other languages
Czech (cs)
Other versions
CZ303973B6 (en
Inventor
Plesinger@Filip
Behávka@Miroslav
Original Assignee
Evektor, Spol. S R. O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Evektor, Spol. S R. O. filed Critical Evektor, Spol. S R. O.
Priority to CZ20120312A priority Critical patent/CZ2012312A3/en
Publication of CZ2012312A3 publication Critical patent/CZ2012312A3/en
Publication of CZ303973B6 publication Critical patent/CZ303973B6/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12Machines characterised by the modularity of some components

Abstract

The compact drive unit comprises a set of switched two-pole reluctance electric motors (1) whose rotors (2) are coupled to each other to drive the output unit of the drive unit and the stator (4) is rotated at regular angular intervals to compensate for the torque variations of the drive unit and the processor for switching control of reluctant electric motors (1).

Description

Technical field

The invention relates to a compact drive unit comprising a set of switched reluctance electric motors.

BACKGROUND OF THE INVENTION

Vehicles or machines of any kind may be driven by an electric motor powered by electrical energy stored both in the form of accumulation and directly, i.e., indirectly, provided from the electricity grid. In the case of autonomous vehicles or machines powered by stored electrical energy, high demands are placed on the low weight and compactness of the components used.

In order to allow practical use of the electric motor, it is necessary to achieve the highest possible performance parameters per unit of weight and at the same time to achieve the maximum possible radius of the vehicle per cycle of electric energy storage in relevant repositories such as accumulators, capacitors, storage units, fuel cells and the like. .

An essential prerequisite for the maximum possible use of the layout of the built-up space is the minimization of the dimensional parameters of the used components of the electric drive. Due to the need to achieve the maximum possible power parameters of the electric vehicle or machine drive per unit weight, it is necessary to reduce the weight of the used electric drive components to the minimum possible level, while maintaining sufficient robustness of the components. These aspects affect the reliability and durability of the powertrain, which must at the same time show a high degree of safety meeting the requirements of legislation and relevant standards.

3 · 5. 201Z

The installation possibilities of electric propulsion are often largely limited by the spatial arrangement of individual vehicle or machine subgroups that are reserved for the primary purpose of use of the vehicle or machine. For the above reasons, there is a reduction in the capacity of the electric energy storage and thus the radius of the electric vehicle or machine is reduced.

In the case of autonomous vehicles or machines in which the electric motor is powered from accumulator cells, both the space and weight requirements of current accumulators are currently very high and therefore the vehicle or machine needs to be designed in such a way that sufficient battery cells are created built-up area. The weight constraints of individual vehicle categories and their radius of action, taking into account the arrangement of other vehicle or machine subgroups, are the main decisive factors. Minimizing the individual components, both in terms of weight and size, allows the use of batteries with a higher capacity and thus positively affects the radius of action of the vehicle, respectively. autonomy of the machine.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks of the prior art are largely eliminated by the compact drive unit according to the invention, which is characterized in that the compact drive unit comprises a system of switched two-pole reluctance electric motors whose rotors are coupled to each other to drive the output unit of the drive unit. spacing to compensate for power unit torque fluctuations, and a processor to control the switching of individual reluctance electric motors. Possible irregularities in the geometrical arrangement of the compact drive unit containing a set of switched two-pole reluctance electric motors can be corrected using the parameters in the processor control program.

/3,5.20+^

In a preferred embodiment of the invention, the axes of rotation of the rotors are parallel to one another.

In a further preferred embodiment of the invention, the output unit of the drive unit comprises a driven shaft of the drive unit for transmitting torque from switched two-pole reluctance electric motors.

In another preferred embodiment of the invention, the output device of the compact drive unit for transmitting the torque from the switched two-pole reluctance electric motors comprises either a toothed gear and / or a chain gear and / or a toothed belt gear.

a drive unit shaft coupled to an electric vehicle drive shaft for driving an electric vehicle drive wheel.

In a particularly preferred embodiment of the invention, the compact drive unit comprises n switched two-pole reluctance electric motors in which rotors or stators are rotated with respect to each other at angular intervals of 180 ° / n, where n is a natural number in the range of 2 to 8. for example, three switched two-pole reluctance electric motors in which rotors or stators are rotated at 60 ° to each other or four switched two-pole reluctance electric motors in which rotors or stators are rotated at 45 ° to each other.

It is also advantageous if the stators of the switched bipolar reluctance electric motors are made of sheet metal with a thickness exceeding 2 mm or more preferably 4 mm or even more preferably the stators of the switched bipolar reluctance electric motors are made of a single piece of magnetic material.

In another preferred embodiment of the invention, at least two rotors share a common shaft.

In yet another preferred embodiment of the invention, the switched two-pole reluctance electric motors are arranged side by side and their rotors are provided with gear wheels, of which the adjacent ones engage with each other.

I t t <

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the accompanying drawings, in which: FIG. 3 shows schematically another exemplary embodiment of a compact drive unit with the coupling method shown in FIG. 4 shows a variant of FIG. 3 with a central gear with internal toothing, FIG. 5 is schematically illustrated 6 shows a schematic illustration of another embodiment of a compact drive unit with a stator plate common to all stators, and FIG. 7 is a cross-sectional view of a compact drive unit according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 schematically shows a first exemplary embodiment of a compact drive unit. This compact drive unit comprises a system of three switched two-pole reluctance electric motors 1, whose rotors 2 are coupled to one another in a drive (not shown) for driving the output device of the drive unit. The output device of the compact drive unit can be a drive shaft 6 of the drive unit at the same time serving either as a drive shaft of a vehicle transmission or a gearbox or as a drive shaft of a vehicle drive wheel. In other cases, the output device of the compact drive unit may be either directly the drive wheel of the vehicle or the central propeller body 9 or propeller. The propeller 9 can either be used to propel a flying vehicle ^ or be a part of a wind turbine> Β3β93 (/3:5-.-201

In this case the set of switched two-pole reluctance motors will work as electric power generator. The propeller can either serve to drive a water moving vehicle or be part of a hydroelectric power plant, in which case the set of switched two-pole reluctance motors will operate as an electric power generator. The stators 4 are provided with phase windings 5 and are arranged parallel to each other and the rotors 2 are set at regular angular intervals of 60 [deg.] To compensate for fluctuations in the torque of the drive unit. Possible irregularities in the geometrical arrangement of the compact drive unit containing the set of switched two-pole reluctance electric motors 1 can be corrected by means of the parameters of the controller of a not represented processor.

FIG. 2 schematically shows a second exemplary embodiment of a compact drive unit which differs from the first embodiment in that the rotors 2 are arranged parallel to one another and the stators 4 are set at regular angular intervals of 60 ° to compensate for the torque variation of the drive units.

FIG. 3 schematically illustrates another exemplary embodiment of a compact drive unit with the coupling method shown. The drive unit is provided with an output device which comprises a driven shaft 6 of the drive unit for transmitting the torque from the switched two-pole reluctance electric motors 1. The rotors 2 are provided with a toothed wheel 7 which, by its toothing, fits into the toothing of the sun gear 8, which is fixedly connected to the driven shaft 6 of the drive unit. The gears 7 form, with the external toothed central gear 8, a gear which transmits the torque from the individual switched two-pole reluctance electric motors 1 to the driven shaft 6 of the drive unit.

FIG. 4 schematically shows another exemplary embodiment of a compact drive unit with the coupling method shown. In contrast to &lt; 093 &gt;

6i Γ of the previous embodiment, the gears 7 fit into the internal gearing of the sun gear 8, which is rigidly connected to the drive shaft 6 of the drive unit. The gears 7 form, with the internal toothed central gear 8, a gear which transmits the torque from the individual switched two-pole reluctance electric motors 1 to the driven shaft 6 of the drive unit.

FIG. 5 schematically shows another exemplary embodiment of a compact drive unit in which torque is transmitted directly to the drive unit without the use of a drive shaft 6 of the drive unit. In this way a direct drive of eg a wheel, a propeller or a water screw can be achieved. In the exemplary embodiment shown in FIG. 5, the sun gear 8 is directly and rigidly connected to the driven unit, which is the propeller 9.

FIG. 6 shows schematically another embodiment of a compact drive unit, consisting of three switched two-pole reluctance electric motors 1, the rotors 2 of which are coupled to each other by a gearwheel 7 of the rotors 2, which fit with the toothing of the sun gear 8. is rigidly connected to the drive shaft 6 of the drive unit. The stator plate is common to all three stators 4.

Fig. 7 is a schematic cross-sectional view of another exemplary embodiment of a compact drive unit. In this figure it can be seen how the rotors 2 of the drive unit are offset at regular angular intervals with respect to each other at angular intervals of 45 °. Possible irregularities in the geometrical arrangement of the compact drive unit containing the set of switched two-pole reluctance electric motors 1 can be corrected by means of the parameters of the controller of a not represented processor.

For the proper function of the exemplary embodiments of a compact drive unit comprising a set of switched two-pole reluctance electric motors 1, it is necessary to assemble a control chain of this assembly. This control chain contains a encoder system, eg rotary encoder 2, voltage encoder, / 03093 / • S7S-20I2 / tt l

current sensors, temperature sensors, etc. This control chain is connected to a control unit containing a processor with a control program and low-current electronic circuits. Furthermore, the control chain comprises power electronics circuits connected to the phase windings 5 of the stators 4.

In operation of the compact drive unit, by means of a rotation sensor (not shown) of one of the rotors 2 of the compact drive unit, due to the interconnection of these rotors 2, instantaneous rotations of all coupled rotors 2 to stators 4 are defined. electronic circuits for connecting the phase windings 5 of those rotors 2, which at the moment are suitably rotated relative to the pole pieces 10 of the two-pole reluctance electric motors 1, to the terminals of the power supply. Weak-current electronic circuits process these signals by allowing power electronics circuits to pass through the power supply to the phase windings 5 of the respective two-pole reluctance electric motors 1. At the moment of current passage through the phase windings 5 of the stator 4 one or more bipolar reluctance motors 1 With respect to the pole pieces 10 of the stators 4, the poles of these rotors 2 are attracted to the pole pieces 10 of the stators 4 due to the action of electromagnetic forces and thereby rotate the rotors 2. This happens until the control program For further information on the current state of the electrical quantities in the compact drive unit, evaluate the need to switch off the current flow through the respective phase windings 5 of the stator / stators 4. Current passing through the phase windings 5 stato The stator 4 must terminate at the latest when the poles of the rotor 2 and stator 4 pass by. If current were not lost in the phase windings 5 of the stators 4, the force effect on the rotating rotors 2 would be reversed and the reluctance motors would be braked or stopped.

Mil

5

The supply voltage is thus connected to the individual phase winding of the stators 4 in such a way that the rotors 2 always rotate to the following pole pieces of the stators 4. In the position in which the rotor 2 is adjacent to the pole piece 10 of the stator 4, no torque is generated. however, since the rotors 2 of the individual switched two-pole reluctance electric motors 1 are set at regular angular intervals, e.g. 45 °, to compensate for fluctuations in the torque of the drive unit, the torque exerts another rotor 2 which is angularly rotated relative to one another. Since all the rotors 2 of one compact drive unit are coupled to one another, the rotor receives it

2, which previously abutted to the pole piece 10 of the stator 4, successively into a position that allows the generation of a torque in the desired sense of rotation. Thus, the output device begins to rotate and remains at the speed by the alternating and partially simultaneous action of the individual switched two-pole reluctance electric motors 1. Whenever one switched two-pole reluctance electric motor 1 reaches a position in which no torque is generated in its rotor 2, torque in some of the other switched two-pole reluctance electric motors 1 of the power unit. This results in an approximately equalization of the torque curve at the output device of the drive unit and the drive unit exhibits approximately uniform speed and power.

The described arrangement of several switched two-pole reluctance electric motors 1, generally arranged in parallel with the axis of rotation of the driven axle, allows the maximum utilization of torque at minimum installation dimensions of the electric drive. At the same time, the installation of the individual switched two-pole reluctance electric motors 1 allows for spatial variability, as illustrated by the preferred embodiments of the invention. Switching two-pole reluctance electric motors 1 are characterized by simplicity, minimal production costs and maximum efficiency of torque development. It is a suitable mechanical interconnection between them

MM

ft ft t t i · | | | | | | | | | | | | | | | | M »» »<<· <

t l

It is possible to obtain an almost balanced torque flow at the end of the electric drive chain, for example on the drive wheels of the vehicle.

Said electric drive configurations can be used not only as a motor vehicle of a motor whose torque is distributed to individual axles or individual wheels using a differential, but also as a direct drive of individual wheels. Each semi-axle of a motor vehicle can be fitted with its compact drive unit, while the amount of torque on each semi-axle can be controlled electronically to optimize vehicle operation. Advantageously, the disk of the individual drive wheel of the vehicle can also be driven directly by a system of switched two-pole reluctance motors by means of internal toothing, without further intermediate members.

Another advantage of the described solution is the reduced noise compared to other types of electric motors, which is given by the use of smaller simple reluctance electric motors that are not permanently loaded but only impacted. In this way, the noise from deformations of the electric motor structure is replaced by mechanical noise of the gears, which is easier to eliminate.

Industrial applicability

The compact powertrain can be used to drive electric vehicles or other machines, especially where internal combustion engines are unsuitable due to the generation of harmful emissions or explosive environments. It can also be used for hybrid vehicle drives.

Reluctance motors have the ability to operate in generator operation, i.e. all of the preferred arrangements mentioned can also be used as electric power generators.

Claims (11)

  1. Patent claims
    Compact drive unit, characterized in that it comprises a set of switched two-pole reluctance electric motors (1), whose rotors (2) are coupled to each other for driving the output unit of the drive unit and rotated at regular angular intervals to compensate for fluctuations torque of the drive unit, and a processor for controlling the switching of the individual reluctance electric motors (1).
  2. Compact drive unit according to claim 1, characterized in that the axes of rotation of the rotors (2) are parallel to one another.
  3. Compact drive unit according to claim 1, characterized in that the output unit of the drive unit comprises a drive shaft (6) of the drive unit for transmitting torque from the switched two-pole reluctance electric motors (1).
  4. Compact drive unit according to claim 1, characterized in that the output unit of the drive unit comprises a gear train for transmitting the torque from the switched two-pole reluctance electric motors (1).
  5. A compact drive unit according to claim 1, characterized in that the output unit of the drive unit comprises a chain transmission and / or a toothed belt transmission for transmitting the torque from the switched two-pole reluctance electric motors (1).
  6. Compact drive unit according to claim 1, characterized in that the drive shaft (6) of the drive unit is coupled to the drive shaft of an electric or hybrid vehicle for driving the drive wheel of an electric or hybrid vehicle.
    03093 * <t
  7. Compact drive unit according to claim 1, characterized in that it comprises n of switched two-pole reluctance electric motors (1) in which the rotors (2) or stators (4) are rotated with respect to each other at angular intervals of 180 ° / n, where n is a natural number ranging from 2 to 8.
  8. Compact drive unit according to claim 1, characterized in that the stators (4) of the switched two-pole reluctance electric motors (1) are made of sheets with a thickness exceeding 2 or preferably 4 mm.
  9. A compact drive unit according to claim 1, characterized in that the stators (4) of the switched two-pole reluctance electric motors (1) are made of a single piece of magnetic material.
  10. Compact drive unit according to claim 3, characterized in that at least two rotors (2) share a common shaft (6).
  11. Compact drive unit according to claims 4 or 5, characterized in that the switched two-pole reluctance electric motors (1) are arranged side by side and their rotors (2) are provided with gear wheels (7), of which the adjacent ones are together in shot.
CZ20120312A 2012-05-11 2012-05-11 Compact power unit CZ2012312A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CZ20120312A CZ2012312A3 (en) 2012-05-11 2012-05-11 Compact power unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20120312A CZ2012312A3 (en) 2012-05-11 2012-05-11 Compact power unit
PCT/CZ2013/000061 WO2013167096A2 (en) 2012-05-11 2013-05-09 Compact driving unit

Publications (2)

Publication Number Publication Date
CZ2012312A3 true CZ2012312A3 (en) 2013-07-24
CZ303973B6 CZ303973B6 (en) 2013-07-24

Family

ID=48700227

Family Applications (1)

Application Number Title Priority Date Filing Date
CZ20120312A CZ2012312A3 (en) 2012-05-11 2012-05-11 Compact power unit

Country Status (2)

Country Link
CZ (1) CZ2012312A3 (en)
WO (1) WO2013167096A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104709464B (en) * 2015-03-12 2017-03-22 江苏艾锐泰克无人飞行器科技有限公司 Multi-rotor unmanned aerial vehicle
WO2016165759A1 (en) * 2015-04-15 2016-10-20 Abb Technology Ag Rotating electric machine
GB201520766D0 (en) * 2015-11-24 2016-01-06 Camcon Auto Ltd Stator assembly

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5886856A (en) * 1981-11-18 1983-05-24 Ishikawajima Harima Heavy Ind Co Ltd Polyphase type variable reluctance stepping motor
US4975608A (en) * 1988-05-23 1990-12-04 Harold Aspden Switched reluctance motor with full accommutation
US5729071A (en) * 1995-01-31 1998-03-17 Steiner; Robert E. Low cost multi-pole motor constructions and methods of manufacture
US5463914A (en) * 1994-02-02 1995-11-07 Tyan; Li Yng Multi-function energy saving power transmission mechanism
WO2003065546A2 (en) * 2002-01-30 2003-08-07 Michael Frederick Johnson Electric motor drive assembly and its use in a hybridvehicle
US7011275B2 (en) * 2002-08-07 2006-03-14 Redfern Daniel J Internal spur gear drive
US20040227423A1 (en) * 2003-05-16 2004-11-18 Cunningham Sydney A. Multiple shafts multiple discs armature electric motor
US20080030108A1 (en) * 2006-08-07 2008-02-07 Kollmorgen Corporation Hybrid stepper motor having magnetic enhancement and heat dissipating housing
US8232700B2 (en) * 2008-12-19 2012-07-31 Pratt & Whitney Canada Corp. Multi-rotor electric machine
CA2773362A1 (en) * 2009-08-14 2011-02-17 Convergent Power, Inc. Pulsed multi-rotor constant air gap motor cluster

Also Published As

Publication number Publication date
WO2013167096A2 (en) 2013-11-14
WO2013167096A3 (en) 2014-11-06
CZ303973B6 (en) 2013-07-24

Similar Documents

Publication Publication Date Title
US10014812B2 (en) Variable torque motor/generator/transmission
US10350984B2 (en) Induction motor-permanent magnet generator tandem configuration starter-generator for hybrid vehicles
ES2555411T3 (en) Variable Magnetic Gears
US7395143B2 (en) Transmission system with a continuously variable transmission ratio
US8350442B2 (en) Power plant
JP5563738B2 (en) 3-end shaft differential transmission
KR20090130874A (en) Fluid powered generator
US9276453B2 (en) Electrical system and method for sustaining an external load
CN101764491B (en) Megawatt grade brushless slip ring double-fed wind generator/motor and control method thereof
US4636707A (en) Power generating equipment
US20150188400A1 (en) Magnetic Flywheel Induction Engine-Motor-Generator
US10038349B2 (en) Multi-phase modular coil element for electric motor and generator
US20130264828A1 (en) Rotational kinetic energy conversion system
CN202918118U (en) Planetary motor
CN103378711B (en) Dual mechanical port magnetic conductance harmonic type electromagnetic gear composite permanent magnet motor
US7023103B2 (en) Apparatus for generating an electrical energy
US20090322098A1 (en) Integrated combustion and electric hybrid engines and methods of making and use thereof
CN202180738U (en) Automobile hybrid power system
EP2109210A2 (en) Uninterrupted battery operated generator system
US20170149303A1 (en) Digitally controlled motor device with storage
PH12015500081B1 (en) A dual-structured electric drive and power system for hybrid vehicles
KR20120051599A (en) Flywheel energy storage system
WO2010009431A3 (en) Power generation system including multiple motors/generators
JP5220196B2 (en) Power equipment
US8742641B2 (en) Concentric motor power generation and drive system