Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
  • H02K11/21—Devices for sensing speed or position, or actuated thereby
  • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
  • H02K11/38—Control circuits or drive circuits associated with geared commutator motors of the worm-and-wheel type
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
  • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
  • H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
  • H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel

Definitions

• the present invention relates to a geared motor device and a gear motor connector.
• the motors or geared motors to which the invention applies are associated with a control system using parameters of speed and / or position of the motor. These parameters are supplied to the control system by a Hall effect sensor associated with a magnet which is adapted to deliver to the sensor a magnetic field depending on the speed and / or the position of the motor shaft.
• the invention provides a motor reduction device comprising an electric motor driving a rotating motor shaft, a magnet on the motor shaft, a Hall effect sensor in the vicinity of the magnet.
• a gap less than or equal to 4 mm separates the sensor from the magnet.
• the difference between the sensor and the magnet is 2 mm.
• the sensor is supported by a connector for transmitting electrical power to the electric motor.
• the connector is removable.
• the connector includes a printed circuit board defining a plane, the sensor being offset from the plane.
• the invention also relates to a gearmotor connector comprising a printed circuit board defining a plane and a Hall effect sensor, the sensor being offset from the plane.
• the Hall effect sensor is in a connector guide hole.
• the connector further comprises electrical power contacts.
• the invention proposes, in one embodiment, to approach a Hall effect sensor in the vicinity of a magnet, seat of a magnetic field linked to operating parameters of the engine.
• the Hall effect sensor is at a distance such that the sensor is able to pick up the magnetic field without the use of an intermediate member between the magnet and the sensor.
• FIG. 1 shows a motor-reduction device 9 comprising a geared motor 10 to which a connector 12 is connected.
• the geared motor 10 comprises an electric motor 11 driving in rotation a reduction gear 13 via a motor shaft 15.
• the motor 11 comprises a stator 17 forming a casing in which are housed permanent magnets (not shown), and supporting by by means of a bearing 18, one end 15a of the drive shaft 15 of a rotor 19.
• the latter comprises, in known manner, windings wound around stacked sheets.
• a collector 20 is electrically connected to the rotor 19 and receives via brushes 21 the supply current from the motor 11 transmitted to said motor 11 at the level of supply terminals 22.
• the geared motor 10 furthermore comprises a casing 23 rigidly fixed to the stator 17 and supporting, via a second bearing assembly, not shown, the second end of the motor shaft 15.
• the section of motor shaft 15 located on the side of this second shaft end is configured in threaded rod forming an endless screw, which drives a reducer 13.
• the motor-reduction device 10 also comprises a magnet 24 on the motor shaft 15.
• the magnet 24 is fixed on the motor shaft 15 so as to follow the motor shaft movements.
• the magnetic field generated by the magnet 24 is then characteristic of the movements of the shaft and of the electric motor 11.
• the magnet 24 is thus driven in rotation at the speed of rotation of the shaft 15.
• the magnet 24 is a magnetic ring on the motor shaft 15.
• the polarization of the magnet 24 is transverse to the longitudinal axis of the shaft 15.
• a sensor 14 is arranged in the motor-reduction device 10 so as to detect the magnetic field of the magnet 24 which is significant for the speed and / or the position of the shaft 15.
• the sensor 14 thus provides information on the operation of the motor shaft 15.
• the sensor 14 is arranged in the vicinity of the magnet 24 in the sense that the sensor 14 is arranged near the magnet 24 so that the sensor 14 detects the magnetic field of the magnet 24 without use intermediate organ. The closer the sensor 14 is to the magnet 24, the better the detection of the magnetic field by the sensor.
• the proximity between the sensor 14 and the magnet 24 allows the sensor 14 to detect the magnetic field at its source where the field is intense in order to increase the useful flux which crosses the sensor and decrease the field losses due to leaks.
• the advantage is to be able to use a Hall effect sensor of lower sensitivity or a weaker magnet.
• Another advantage is to avoid the use of an organ such as a magnetic flux concentrator which makes the manufacture of the reduction motorbike device more complex.
• Figures 2 and 3 show the detection of the magnetic field of the magnet 24 by the sensor 14.
• Figure 2 shows the magnet 24 with two North and South poles with lines of the magnetic field 42 extending from one pole to the other. The field lines 42 are picked up by the sensor 14 placed in the vicinity of the magnet 24.
• FIG. 3 shows a magnet 24 with two North poles and two South poles with lines of the magnetic field 42 extending from one North pole to a South Pole. The field lines 42 are picked up by the sensor 14 placed in the vicinity of the magnet 24.
• a gap of at most 4 mm separates the sensor 14 from the magnet 24.
• a 20 G sensor can be used for a 4-pole ring.
• the distance between the sensor 14 and the magnet 24 is 2 mm.
• the number of poles can be increased to 6, thus obtaining greater accuracy in the measurement of the position.
• a bipolar ring can be accepted for correct operation because the weak magnetic field does not allow the field to be transmitted magnetic to the sensor.
• the sensor 14 can be fixed for example on the casing 23, on the supply causses 22 or even on the collector 20 depending on the location of the magnet 24 along the axis of the motor shaft 15.
• the advantage is to be able to climb the Hall effect sensor 14 as soon as the gearmotor device 9 is mounted or not, as required, on the same standard gearmotor device.
• the Hall effect sensor 14 is supported by the connector 12 for transmitting the electrical power to the electric motor 11.
• the casing 23 has a passage 25 near the power terminals 22 so as to receive the connector 12 with a guide hole 41 inside which is the sensor 14.
• the connector 12 may include a printed circuit board 26 of an electric motor control device 11.
• the printed circuit is capable of delivering a current supplying the motor 11.
• the current delivered by the electronic circuit passes through electrical contacts 32 of power of "lyre" type, that is to say contacts of which one end is constituted by an elastic clamp with two portions of symmetrical contacts curved inwards.
• the connector 12 is removable.
• the connector 12 is held in position by the releasable coupling members of the conventional type, not shown.
• the advantage is that the connector 12 can be replaced by another connector comprising a different control electronics.
• the advantage is also that the sensor 14 does not have to be mounted in the casing 23 of the geared motor. It is also not necessary to provide for the connections of the sensor during the manufacture of the motor reduction device, which simplifies its manufacture. Supporting the sensor by the removable power transmission connector enables sensor faults to be remedied or the sensor type to be changed by removing the connector.
• Such a removable support also makes it possible to simply adjust or readjust the position of the sensor on the connector so that the detection of the magnetic field by the sensor is optimized, whereas this is more difficult if the sensor is permanently in the gearmotor.
• the sensor 14 can be mounted on the printed circuit board 26. This makes it possible to fix on the card 26 the processing electronics (not shown) for the detection of the magnetic field by the sensor 14.
• the card 26 printed circuit board defines a plane P, the sensor 14 being offset relative to the plane P. This allows the sensor 14 to be fixed on the card 26 and to be in the vicinity of the magnet 24.
• the sensor 14 is for example provided with long connection tabs referenced 35 in FIG. 1. The length of the tabs is chosen as a function of the spacing between the plane P and the magnet 24. For example, the tabs 35 have a length of 30 mm.
• the invention also relates to such a connector 12.
• the connector 12 comprises a housing 36 on which the releasable hooking members (not shown) are mounted.
• the housing 36 contains the printed circuit board 26, the electrical power contacts 32 and the sensor 14 to Hall effect.
• the housing 36 is for example obtained by molding.
• the connection between the housing 36 and the outline of the opening 25 is sealed so as to keep the interior of the geared motor 10 sealed; moreover, the seal between the interior of the housing 36 and the interior of the geared motor 10 is preferably also retained.
• the sensor 14 is advantageously in the guide hole 41 inside the housing 36 to ensure the seal between the housing 36 and the geared motor 10.
• the detection of the magnetic field by the sensor 14 is carried out through the housing 36.
• the housing 36 protects the sensor 14.
• the distance between the sensor 14 and the magnet 24 is chosen so as to allow the sensor 14 to be housed in the housing 36, and to approach the housing 36 of the magnet 24 taking into account manufacturing tolerances of the magnet 24 and the shaft 15 and without contact occurring between the housing 36 and the magnet 24.
• the connector according to the invention makes a single gearmotor configuration adaptable to various applications.
• the standardization of the gearmotor is offset by the possible diversification of the connector by modifying the electronics of the printed circuit board and the type of Hall effect sensor. This makes it possible to make the manufacturing reduction motor device simpler and less expensive.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=29414973

Family Applications (1)

Country Status (9)

Families Citing this family (21)

Family Cites Families (25)

• 2002
  • 2002-05-22 FR FR0206213A patent/FR2840123B1/fr not_active Expired - Fee Related
• 2003
  • 2003-05-20 US US10/762,587 patent/US7141904B2/en not_active Expired - Fee Related
  • 2003-05-20 EP EP03752840A patent/EP1509987A2/fr not_active Withdrawn
  • 2003-05-20 BR BR0304885-3A patent/BR0304885A/pt not_active IP Right Cessation
  • 2003-05-20 WO PCT/FR2003/001521 patent/WO2003098780A2/fr not_active Application Discontinuation
  • 2003-05-20 MX MXPA04000632A patent/MXPA04000632A/es unknown
  • 2003-05-20 AU AU2003258767A patent/AU2003258767A1/en not_active Abandoned
  • 2003-05-20 CN CNB038007088A patent/CN1298096C/zh not_active Expired - Fee Related
  • 2003-05-20 KR KR10-2004-7000871A patent/KR20040103893A/ko not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events