Synchronous machine provided with an angular position sensor

• US 10,312,774 B2
• Filed: 02/24/2015
• Issued: 06/04/2019
• Est. Priority Date: 02/24/2014
• Status: Active Grant

• Current Assignee: Lohr Electromecanique
• Original Assignee: Lohr Electromecanique
• Inventors: Dumas, Pierre
• Primary Examiner(s): Mullins, Burton S
• Application Number:
  US15/119,949
• Publication Number:
  US 20170063204A1
• Time in Patent Office: 1,561 Days
• Field of Search: 310 68, 310162, 310DIG 3B, 310 67 R, 310112, 180 6551, 32420725
• CPC Class Codes: G01D 5/2013 by a movable ferromagnetic element, e.g. a core G01D5/2033 takes precedence
• CPC Class Codes: H02K 1/26 Rotor cores with slots for windings
• CPC Class Codes: H02K 1/27 Rotor cores with permanent magnets
• CPC Class Codes: H02K 11/215 Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 29/08 using magnetic effect devices, e.g. Hall-plates, magneto-resistors H02K29/12 takes precedence
• CPC Class Codes: H02P 27/08 with pulse width modulation

Abstract

The invention relates to a synchronous machine (1) including a stator (2) and a rotor (3). Said machine is provided with at least one sensor (1a) of the angular position of the rotor (3) and is characterized in that the stator (2) includes a winding provided such as to be supplied with polyphase current by an electronic power device. The rotor (3), which includes permanent magnets (4), is provided such as to rotate about the stator (2). The angular position sensor (1a) extends away from the rotor (3) and is in alignment with the latter at the permanent magnets (4). The angular position sensor (1a) includes at least two sensors (6) for measuring magnetic induction and are provided for detecting variation in the axial magnetic field of the rotor (3) in the form of voltage, and the angular position sensor (1a) moreover includes at least one electronic unit provided for receiving the voltages of the magnetic induction measurement sensors (6) such as to absolutely deduce therefrom the angular position of the rotor (3) and send corresponding information, in real time, to the electronic power device.

Claims

1. A synchronous machine comprising a stator and a rotor, the machine being equipped with at least one angular position sensor module of the rotor, wherein:

the stator has a winding designed to be supplied with multi-phase AC current by an electronic power device,

the rotor comprises components that generate magnetic induction and designed to move in rotation when power is supplied to the stator,

the angular position sensor module comprises at least one pair of two magnetic induction measurement sensors to detect the variation of the axial magnetic field generated by the components that generate magnetic induction while supplying a voltage, the said sensors of the module or of each module being at an angular deviation of 90 electrical degrees,

the magnetic induction measurement sensors, integral with the stator, extend at an axial end of rotor, opposite and immediately next to the axial edges of the components that generate the magnetic induction, wherein the magnetic induction measurement sensors are attached and set out on at least one removable support of the stator so as to extend along a line whose curve substantially matches the curve of the succession of axial edges of the components that generate the magnetic induction, and

the angular position sensor module comprising at least one electronic unit to receive output voltages supplied by the magnetic induction measurement sensors, to determine an absolute angular position of the rotor and to transmit the determined absolute angular position to the electronic power device in real time.

2. The synchronous machine according to claim 1, wherein the rotor extends around the stator.

3. The synchronous machine according to claim 1, comprising at the least two angular position sensor modules.

4. The synchronous machine according to claim 1 wherein the at least one removable support comprises two removable supports each provided with five magnetic induction measurement sensors, including the at least one pair of two magnetic induction measurement sensors.

5. The synchronous machine according to claim 1 wherein the removable support comprises at least one electronic circuit of the electronic unit.

6. The synchronous machine according to claim 1, wherein the removable support comprises a temperature sensor.

7. The synchronous machine according to claim 1, wherein the magnetic induction measurement sensors comprise Hall effect sensors.

8. The synchronous machine according to claim 1, wherein the magnetic induction measurement sensors comprise magnetoresistance sensors.

9. The synchronous machine according to claim 1, wherein the electronic power device includes a converter configured to drive the said synchronous machine by pulse width modulation.

10. The synchronous machine according to claim 1, wherein the components that generate the magnetic induction comprise permanent magnets.

11. The synchronous machine according to claim 1, wherein the synchronous machine is implemented as a wheel-motor of a vehicle.

12. The synchronous machine according to claim 1, wherein the at least one pair of two magnetic induction measurement sensors comprises a first pair of magnetic induction measurement sensors and a second pair of magnetic induction measurement sensors, wherein a magnetic induction measurement sensor of the first pair is at an angular deviation of 90 electrical degrees to a nearby magnetic induction measurement sensor of the first pair, and wherein a magnetic induction measurement sensor of the second pair is at an angular deviation of 90 electrical degrees to a nearby magnetic induction measurement sensor of the first pair.