JP2007049862A - Electric machine with built-in magnetic pole position sensor, electric machine device, and on-vehicle electric machine system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine device which can reduce the output errors of a magnetic pole position sensor due to the effects of the magnetic leakage flux generated by winding, to suppress the generation of the pulsasion torque of the rotary electric machine under the influence of the output error. <P>SOLUTION: The rotary electric machine device is provided with a sensor output correction circuit 15, which corrects the output information of the magnetic pole position sensor 11 built in an permanent magnet rotary electric machine 1. The device corrects the output informaiton of the magnetic pole position sensor 11, corresponding to the sensor output correction information for correcting the output information of the magnetic pole position sensor 11, and removes all the error or much of the errors caused by the effects of the magnetic leakage flux generated by a stator winding 5 from the output information of the magnetic pole position sensor 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric machine having a built-in magnetic pole position sensor inside an apparatus, an electric machine device using the electric machine, and an in-vehicle electric system equipped with the electric machine device.

  As an electric machine incorporating a magnetic pole position sensor inside the device, for example, there is a permanent magnet rotating electric machine disclosed in Patent Document 1. In the permanent magnet rotating electrical machine disclosed in Patent Document 1, a magnetic pole position sensor for detecting the magnetic pole position of the rotor is built in the magnetic pole of the stator, and the magnetic flux of the permanent magnet that forms the magnetic pole of the rotor is detected. Yes. Thereby, in the permanent magnet rotating electrical machine disclosed in Patent Document 1, the rotating electrical machine is downsized and the work of positioning the magnetic pole position sensor after the magnetic pole position sensor is attached is omitted.

JP 2004-153924 A

  Many in-vehicle auxiliary machines that are driven by a hydraulic mechanism using an engine as a power source are mounted on automobiles. On the other hand, automobiles are required to improve fuel efficiency by reducing engine load and to improve environmental resistance by reducing engine exhaust gas. For this reason, recently, so-called electrification, in which an electric machine such as a rotating electric machine or a linear motor is used as a drive source for an in-vehicle auxiliary machine, has been accelerated. In addition, the electrification allows the energy consumed by driving the in-vehicle auxiliary equipment to be only the power consumption during the operation of the in-vehicle auxiliary equipment, and from the energy consumption of the hydraulic mechanism that must ensure a predetermined hydraulic pressure at all times. Can also be reduced.

  As a drive electric machine for an in-vehicle auxiliary machine, a DC motor that is small and light and advantageous in terms of price, as represented by an actuator such as an electric power steering device and a throttle valve, is mainly used. Recently, however, permanent magnet brushless motors and linear motors, which have the effect of making small and light weight, high efficiency, and maintenance-free by developing high-performance magnets such as neodymium magnets, are used as electric machines for driving on-vehicle auxiliaries. There are also many.

  When controlling the driving of an electric machine using a permanent magnet, information on the movable magnetic pole position is required as input information. For this reason, a magnetic pole position sensor for detecting the magnetic pole position of the mover is attached to an electric machine using a permanent magnet. The attachment position of the magnetic pole position sensor is often the end of the rotating shaft of the electric machine, but it may be built in the electric machine as in the background art.

  In the electric machine in which the magnetic pole position sensor is attached to the end of the movable shaft, a part of the electric machine in the axial direction is occupied by the attachment of the magnetic pole position sensor. For this reason, in an electric machine in which the axial length and output torque are determined, when the magnetic pole position sensor is attached to the end of the movable shaft, the axial dimension of the iron core necessary for outputting torque is the magnetic pole position. Limited by sensor mounting. In particular, in a flat electric machine having a larger dimension in the radial direction than in the axial direction, there is a limit in outputting a predetermined torque with the dimension in the predetermined axial direction due to the limitation in the axial dimension of the iron core. As a solution to this, it is conceivable that the interval between the iron core portion and the magnetic pole position sensor is narrowed, and the magnetic pole position sensor is arranged near the winding end protruding from the axial end of the iron core. However, if the magnetic pole position sensor is arranged near the end of the winding, the magnetic pole position sensor is affected by the leakage magnetic flux generated by the winding, and an error occurs in the sensor output. This output error appears as pulsation torque of the electric machine.

  The influence of the leakage magnetic flux produced by the winding is also the same in an electric machine that incorporates a magnetic pole position sensor in the iron core. For this reason, in the background art, a slot for accommodating the magnetic pole position sensor is formed on the surface of the stator salient pole facing the mover, and magnetic barriers are formed on both sides in the circumferential direction of the slot. However, as in the background art, when a notch such as a slot is formed on the surface of the stator salient pole that faces the mover, high-cycle magnetic fluctuations occur in the magnetic circuit, and the magnetic pole position sensor influences the magnetic fluctuations. receive. Moreover, since the iron core portion has the same shape in the axial direction, when the magnetic pole position sensor is arranged in the iron core portion as in the background art, the ratio of the non-torque generating portion in the iron core portion is particularly large in an electric machine that is long in the axial direction. The generated torque decreases.

  The present invention provides an electromechanical device capable of reducing an output error of a magnetic pole position sensor due to an influence of a leakage magnetic flux generated by a winding and suppressing generation of a pulsating torque of the electric machine due to the influence of the output error.

  Here, the present invention includes sensor output information correction means for correcting the output information of the magnetic pole position sensor built in the electric machine, and the magnetic pole position according to the sensor output correction information for correcting the output information of the magnetic pole position sensor. The sensor output information is corrected.

  As described above, according to the present invention for correcting the output information of the magnetic pole position sensor, all or most of the error due to the influence of the leakage magnetic flux generated by the winding can be removed from the output information of the magnetic pole position sensor. As a result, according to the present invention, information on the movable magnetic pole position is obtained from the sensor correction output information from which all or most of the error due to the influence of the leakage magnetic flux generated by the winding has been removed, and is supplied to the electric machine. The current can be controlled. Therefore, according to the present invention, it is possible to reduce the output error of the magnetic pole position sensor due to the influence of the leakage magnetic flux generated by the winding, and to suppress the generation of the pulsating torque of the electric machine due to the influence of the output error.

  In addition, the present invention provides an electric machine that can reduce magnetic fluctuation caused by the built-in magnetic pole position sensor mounting structure and can suppress a decrease in output accuracy of the magnetic pole position sensor due to the influence of the magnetic fluctuation. .

  In the present invention, at least one sensor mounting salient pole for mounting a magnetic pole position sensor is provided on an iron core having a plurality of magnetic path salient poles, and the mover at the center of the magnetic pole at the tip of the sensor mounting salient pole The sensor mounting salient pole is formed such that the facing distance is larger than the facing distance between the magnetic path salient pole and the mover at the center of the magnetic pole. A magnetic pole position sensor is arranged in the gap between the magnetic pole position sensor and the magnetic pole position sensor is fixed to the protruding end of the sensor mounting salient pole.

  Thus, according to the present invention for fixing the magnetic pole position sensor, it is possible to fix the magnetic pole position sensor to the sensor mounting salient pole without providing the sensor mounting salient pole with a notch that causes magnetic fluctuation in the magnetic circuit. . As a result, according to the present invention, it is possible to suppress high-frequency magnetic fluctuations that occur in the magnetic circuit due to the notches, and to suppress magnetic fluctuations from the magnetic circuit to the magnetic pole position sensor. Therefore, according to the present invention, it is possible to reduce magnetic fluctuation caused by the built-in magnetic pole position sensor mounting structure, and to suppress a decrease in output accuracy of the magnetic pole position sensor due to the influence of the magnetic fluctuation.

  Furthermore, the present invention provides an electric machine that can reduce magnetic fluctuations caused by the built-in magnetic pole position sensor mounting structure and suppress the generation of pulsating torque due to the influence of the magnetic fluctuations.

  Here, in the present invention, at least one sensor mounting salient pole for mounting a magnetic pole position sensor is provided on an iron core having a plurality of magnetic path salient poles, and magnetism generated by magnetic balance between the sensor mounting salient pole and the mover. The fluctuation is characterized in that a means for generating a magnetic fluctuation of an antiphase component is applied to the magnetic path salient pole.

  As described above, according to the present invention that generates a magnetic fluctuation having a component opposite to the magnetic fluctuation caused by the magnetic balance between the sensor mounting salient pole and the rotor, the cogging torque generated by providing the sensor mounting salient pole, that is, Cogging torque having the same number of amplitudes as the number of movable magnetic poles per movable can be reduced. Therefore, according to the present invention, it is possible to reduce the magnetic fluctuation caused by the built-in magnetic pole position sensor mounting structure, and to suppress the generation of pulsating torque due to the influence of the magnetic fluctuation.

  Furthermore, the present invention provides the above-mentioned electric machine device or an in-vehicle electric system equipped with the electric machine.

  As an in-vehicle electric system, there are an electric brake device, an electric power steering device, an electronic control throttle device, an electromagnetic suspension device, a vehicle drive device, and the like.

  According to the present invention described above, the output error of the magnetic pole position sensor due to the influence of the leakage magnetic flux generated by the winding can be reduced, and the generation of pulsation torque of the electric machine due to the influence of the output error can be suppressed. Therefore, even when the magnetic pole position sensor is built in the electric machine, it is possible to perform drive control of the electric machine with an accurate magnetic pole position. Therefore, according to the present invention, a small and high-performance electromechanical device can be provided.

  Further, according to the present invention, it is possible to reduce the magnetic fluctuation caused by the built-in magnetic pole position sensor mounting structure, and to suppress the decrease in the output accuracy of the magnetic pole position sensor due to the influence of the magnetic fluctuation. Highly accurate information can be supplied to the control device as output information of the magnetic pole position sensor used for drive control of the machine. Therefore, according to the present invention, an electric machine suitable for the built-in magnetic pole position sensor can be provided.

  In addition, according to the present invention, the magnetic fluctuation caused by the built-in magnetic pole position sensor mounting structure can be reduced, and the generation of pulsating torque due to the influence of the magnetic fluctuation can be suppressed. Even if it is built in the machine, it is possible to suppress the deterioration of the characteristics of the electric machine. Therefore, according to the present invention, a high-performance electric machine incorporating a magnetic pole position sensor can be provided.

  Furthermore, according to this invention, the said vehicle machine system which mounts the said electric machine apparatus or the said electric machine can be provided.

  Embodiments of the present invention will be described with reference to the drawings.

  In the following embodiments, an electric brake device that requires high-precision control will be described as an example of an in-vehicle electric machine system using the electromechanical device of the present invention. The electric brake device transmits an electric force generated by a rotating electric machine that uses an in-vehicle battery constituting an in-vehicle power source as a power source to a wheel as a braking force.

  In addition, the configuration of the electromechanical device described below includes an electric power steering device that transmits an electric force generated by a rotating electric machine that uses an in-vehicle battery that constitutes an in-vehicle power source as a power source to a wheel, and an in-vehicle power source that constitutes the in-vehicle power source. An electronically controlled throttle device that controls the amount of air supplied to the engine, which is an internal combustion engine, by driving electric power generated by a rotating electrical machine that uses a battery as a power source. The damper is composed of a linear motor that generates electric power, the suspension device that attenuates the expansion and contraction of the spring that supports the vehicle body while absorbing the shock received by the vehicle body, and the electric power generated by the rotating electrical machine that uses the vehicle battery that constitutes the vehicle power supply. The present invention can also be applied to an in-vehicle electric system such as a vehicle drive device that transmits a vehicle driving force to wheels.

  The configuration of the electromechanical device described below can also be applied to an electrical system for industrial equipment installed in a factory or the like, or an electrical system for household equipment such as an air conditioner or a washing machine.

  A first embodiment of the present invention will be described with reference to FIGS.

  First, the configuration of the permanent magnet rotating electric machine according to the present embodiment will be described with reference to FIGS.

  The permanent magnet rotating electrical machine 1 according to the present embodiment is an electric machine having a built-in magnetic pole position sensor for detecting a rotating magnetic pole position, and is based on a magnetic action between the stator 2 that generates a rotating magnetic field and the stator 2. A rotor 3 is disposed on the inner peripheral side of the stator 2 so as to be rotated through a gap so as to be opposed to the stator 2.

  The stator 2 includes a stator core 4 that forms a magnetic path on the fixed side, and a stator winding 5 that generates a magnetic flux when energized.

  The stator core 4 projects from the inner surface of the yoke portion 41 to the inner side surface of the yoke portion 41 and protrudes radially inward from the inner peripheral surface of the yoke portion 41 (or core back portion). A plurality of stator salient poles 42 and 44 (or teeth portions) extending in the axial direction along the axis. The stator salient poles 42 are arranged at equal intervals in the circumferential direction along the inner peripheral surface of the yoke portion 41. A stator salient pole 44 is disposed between one stator salient pole 42 adjacent in the circumferential direction (between U1 + stator salient pole 42 and W3 + stator salient pole 42). In this embodiment, as is clear from the phase symbols (U, V, W) attached to the stator salient poles 42, three stator salient poles 42 are continuously arranged in the circumferential direction for each phase. Thus, stator salient pole groups of each phase are formed, and the stator salient pole groups are arranged in the circumferential direction in the order of the U phase, the V phase, and the W phase. According to such an arrangement, phase windings can be continuously wound around the corresponding stator salient poles 42 for each phase, and the number of phase winding connections at the coil end portion of the stator winding 5 can be reduced. . The numbers given next to the phase symbols indicate the number of stator salient poles 42 belonging to each phase, and the positive / negative symbols (+, −) given next to the numbers are wound around the stator salient poles 42. The direction of the electric current which flows into the arranged phase winding is shown.

  Further, the stator core 4 is formed by stacking a plurality of plate-shaped molding members formed by punching a plate-shaped magnetic member (silicon steel plate) in the axial direction, and a core piece corresponding to the yoke portion 41. And the core piece corresponding to the stator salient poles 42 and 44, or the core piece corresponding to the yoke 41 and the core piece corresponding to the stator salient poles 42 and 44 are separately (divided). It is formed by one of the core methods to be manufactured. In the former core system, a plurality of plate-shaped molded members in which an iron core plate portion corresponding to the yoke portion 41 and iron core plate portions corresponding to the stator salient poles 42 and 44 are integrated into a plate-like magnetic member. The stator core 4 is manufactured by punching in the axial direction and laminating a plurality of the plate-shaped molded members thus manufactured. In the latter core system, a plurality of plate-shaped molded members corresponding to the yoke portion 41 and a plurality of plate-shaped molded members corresponding to the stator salient poles 42 and 44 are separately provided, and the plate-shaped magnetic member is pivoted. Produced by punching in the direction, each of the produced plate-shaped molded members is laminated to produce a core piece corresponding to the yoke portion 41 and a core piece corresponding to the stator salient poles 42 and 44, respectively. Thereafter, the core piece corresponding to the stator salient poles 42 and 44 is coupled to the core piece corresponding to the yoke portion 41 to manufacture the stator core 4.

  Each of the plurality of stator salient poles 42 is intensively wound with a corresponding phase winding of the stator winding 5 via an insulating member (winding bobbin not shown). This concentrated winding is a winding method in which a plurality of winding conductors are wound around the four side surfaces of the core piece of the stator salient pole 42. The stator winding 5 is not wound around the stator salient poles 44 of the stator core 4. By arranging the stator salient poles 42 and 44 in the circumferential direction, a phase wound around the stator salient pole 42 is provided between the stator salient poles 42 adjacent to each other in the circumferential direction and between the stator salient poles 42 to 44. A slot 43 is formed to accommodate the linear portion of the winding. Coil end portions connecting the two linear portions of the phase winding protrude outward in the axial direction from both axial ends of the stator core 4. In this embodiment, a star connection method is used in which each phase winding of the stator winding 5 is connected in a Y shape. However, a delta connection in which each phase winding of the stator winding 5 is connected in a Δ shape. May be adopted.

  The rotor 3 includes a rotor core 7 that forms a magnetic path on the rotation side, a permanent magnet 6 that forms a rotating magnetic pole, and a shaft 8 that forms a rotating shaft.

  The stator core 7 is formed by laminating a plurality of plate-shaped molded members formed by punching a plate-shaped magnetic member (silicon steel plate) in the axial direction, and is press-fitted into the outer periphery of the shaft 8. It is a cylindrical thing fitted on the outer peripheral surface. The permanent magnet 6 has a substantially semi-cylindrical shape extending in the axial direction along the outer peripheral surface of the stator core 7 and having N and S magnetic poles formed in the radial direction. The outer peripheral surface of the rotor core 7 Are arranged at equal intervals in the circumferential direction, and are fixed on the outer peripheral surface of the rotor core 7 using an adhesive. The polarities of the permanent magnets 6 adjacent to each other in the circumferential direction are opposite to each other. The permanent magnet 6 is a rare earth magnet that contributes most to miniaturization and high efficiency of the rotating electrical machine. The radial shaft side magnetic pole of the permanent magnet 6 is an arc concentric with the outer periphery of the rotor core 7. The radial stator side magnetic pole of the permanent magnet 6 is non-concentric with the arc of the radial shaft side magnetic pole, and has a circular arc such that the magnetic pole center protrudes toward the gap. Thus, according to the magnet shape in which the radial thickness of the magnet increases from the circumferential end of the magnet toward the circumferential central portion of the magnet, and the circumferential central portion of the magnet projects to the most gap side, The magnetic flux density distribution on the air gap surface of the permanent magnet 6 can be made sinusoidal. The shaft 8 is provided on the central axis of the rotor core 7, and the inner peripheral side of the rotor core 7 is fitted onto the outer peripheral surface by press-fitting or the like. And is supported rotatably by bearings 10 disposed at both ends in the axial direction.

  Although not shown, a pressing member for pressing the plurality of permanent magnets 6 from the outer peripheral side is provided on the outer peripheral side. This member is an annular member made of metal (for example, stainless steel) provided to prevent the permanent magnet 6 from scattering from the rotor core 7 due to the centrifugal force of the rotor 3.

  The stator 2 is held inside the bracket 9 by sandwiching both axial ends on the outer peripheral side of the stator core 4 from both sides in the axial direction by brackets 9 constituting the housing. The bracket 9 is an annular member that is open at one end in the axial direction and closed at the other end. The shaft 8 is rotatably supported by a bearing 10 fixed to the closing surface of the bracket 9. Thereby, the rotor 3 is held rotatably from the stator 2. Further, the shaft 8 protrudes further outward in the axial direction than the bearing 10 and can be connected to other devices.

  In this embodiment, the permanent magnet rotating electrical machine 1 having nine stator salient poles 42 and ten permanent magnets 6 and so-called 10 poles 9 slots has been described as an example. The permanent magnet rotating electrical machine 1 has the same number of magnetic poles-slots as 10 poles and 9 slots, has 10 poles and 12 slots, has the same ratio of magnetic poles and slots as 10 poles and 12 slots, and has 8 poles and 9 slots. You may use the thing of the same number of magnetic poles-slots as 8 poles and 9 slots.

  The opposing surface (gap surface) of the protruding end of the stator salient pole 44 to the rotor 3 is located closer to the yoke part 41 than the opposing surface (gap surface) of the protruding end of the stator salient pole 42 to the rotor 3. Yes. Thus, the gap dimension between the inner peripheral surface of the protruding end of the stator salient pole 44 and the outer peripheral surface of the rotor 3 is between the inner peripheral surface of the protruding end of the stator salient pole 42 and the outer peripheral surface of the rotor 3. It is larger than the void size. In the gap between the inner peripheral surface of the protruding end of the stator salient pole 44 and the outer peripheral surface of the rotor 3, three magnetic pole position sensors 11 for detecting the position of the rotating magnetic pole of the rotor 3 are respectively provided. Are arranged in parallel in the circumferential direction so as to have a phase difference of 120 degrees (electrical angle) and in the order of U phase Hu, V phase Hv, and W phase Hw in the counterclockwise direction. The magnetic pole position sensor 11 is a magnetic sensing element such as a Hall element, and is mounted on the inner peripheral surface of the stator salient pole 44 so as to ensure accuracy by a fixing method such as adhesion. Here, the reason why there are three magnetic pole position sensors 11 (Hu, Hv, Hw) is because the permanent magnet rotating electrical machine 1 is a three-phase AC synchronous machine.

  Note that the outer peripheral surface of the rotor 3 is a peripheral surface formed by connecting portions of the permanent magnet 6 that protrudes most to the stator 2 side.

  The magnetic pole position sensor 11 outputs a sinusoidal signal when the magnetic flux of the permanent magnet 6 is linked. In the present embodiment, as described above, the permanent magnet 6 has a semi-cylindrical shape, so that the output of the magnetic pole position sensor 11 is a clean (no distortion) sine wave corresponding to the position of the rotor 3. The position of the rotating magnetic pole of the rotor 3 can be detected by taking the sine wave signal output from the magnetic pole position sensor 11 through, for example, an analog / digital (A / D) converter provided in the microprocessor.

  In the present embodiment, the case where three (Hu, Hv, Hw) magnetic pole position sensors 11 are arranged at intervals of 120 degrees (electrical angle) has been described as an example. The arrangement interval of the magnetic pole position sensors 11 may be 60 degrees (electrical angle). In this case, for example, the output waveform of the V-phase Hv magnetic pole position sensor 11 is a sine waveform having the same phase as that in the case of 120 degree (electrical angle) spacing, and the U-phase Hu and W-phase Hw magnetic pole position sensors. The output waveform of 11 is a sinusoidal waveform having an inverted phase (multiplied by −) whose phase is inverted from that of the case of the 120 degree (electrical angle) interval. Further, the magnetic pole position of the rotor 3 can be detected basically even when the two magnetic pole position sensors 11 are arranged at an interval of 90 degrees (electrical angle).

  Next, the configuration of the permanent magnet rotating electrical machine apparatus of this embodiment (the electric drive system including the control device of the permanent magnet rotating electrical machine 1) will be described with reference to FIG.

  The permanent magnet rotating electrical machine apparatus (actuator) of the present embodiment includes a permanent magnet rotating electrical machine 1 that generates an electric force for driving a driven body, a DC power source 12 that constitutes a driving power source of the permanent magnet rotating electrical machine 1, And a control device for controlling driving by controlling electric power supplied to the permanent magnet rotating electrical machine 1.

  The permanent magnet rotating electrical machine 1 is configured as described above. The DC power supply 12 can supply DC power, and corresponds to a power storage device that can charge and discharge DC power, such as an automobile. The control device is an inverter device, which converts DC power supplied from the DC power supply 12 into predetermined AC power and supplies the AC power to the stator winding 5 of the permanent magnet rotating electrical machine 1.

  The inverter device includes a power system inverter circuit 14 (power conversion circuit) electrically connected between the DC power supply 12 and the stator winding 5, and a control circuit for controlling the operation of the inverter circuit 14. Yes.

  The inverter circuit 14 is a bridge circuit composed of switching semiconductor elements (for example, MOS-FET: metal oxide semiconductor field effect transistor, IGBT: insulated gate bipolar transistor). The bridge circuit is configured such that series circuits called arms are electrically connected in parallel for the number of phases of the permanent magnet rotating electrical machine 1 (three in this embodiment because there are three phases). Each arm is configured by electrically connecting an upper arm switching semiconductor element and a lower arm switching semiconductor element in series. The high-potential side circuit end of each arm is electrically connected to the positive side of the DC power supply 2 and the low-potential side circuit end is electrically connected to the negative side of the DC power supply 2 and grounded. The midpoint of each arm (between the switching semiconductor element on the upper arm side and the switching semiconductor element on the lower arm side) is electrically connected to the corresponding phase winding of the stator winding 5.

  A smoothing capacitor 20 is electrically connected in parallel between the inverter circuit 14 and the DC power source 2. A current sensor 13 is provided between the inverter circuit 14 and the stator winding 5. The current sensor 13 is composed of a current transformer or the like, and detects an alternating current flowing in each phase.

  The control circuit controls the operation (on / off) of the switching semiconductor element of the inverter circuit 14 based on input information. As input information, a required torque (current command signal Is) for the permanent magnet rotating electrical machine 1 and a magnetic pole position θ of the rotor 3 of the permanent magnet rotating electrical machine 1 are input. The required torque (current command signal Is) is output from the upper control circuit in accordance with the required amount required for the driven body (for example, in an automobile, the acceleration / deceleration amount (accelerator operation amount) required for the vehicle from the driver). Command information. The magnetic pole position θ is detection information obtained from the output of the magnetic pole position sensor 11.

  The output signals output from the three magnetic pole position sensors 11 together with the output signal output from the current sensor 13 (a three-phase current detection signal supplied to the stator winding 5) and an A / D converter (not shown) ) To the sensor output correction circuit 15. The sensor output correction circuit 15 generates sensor output correction information based on the sensor output information obtained from the output signal of the current sensor 13, and is obtained from the output signal of the magnetic pole position sensor 11 based on the sensor output correction information. Correct the sensor output information. A specific method for correcting the sensor output information in the sensor output correction circuit 15 will be described later.

  Here, the output signals output from the magnetic pole position sensor 11 and the current sensor 13 include a high-frequency component by pulse width modulation (PWM: pulse wide modulation). In order to improve the magnetic pole position detection accuracy of the rotor 3, it is necessary to remove the high frequency component. Therefore, in this embodiment, a filter circuit (not shown) is provided on the input side of the sensor output correction circuit 15 to remove the high frequency component.

  The corrected sensor output information is input from the sensor output correction circuit 15 to the three-phase / two-phase conversion circuit 16 as sensor correction output information. The three-phase / two-phase conversion circuit 16 converts the sensor correction output information from the three-phase value to the two-phase value, and calculates and outputs the magnetic pole position information θ of the rotor 3 based on this conversion.

  The magnetic pole position information θ output from the three-phase / two-phase conversion circuit 16 is input to the conversion circuit 18. Further, the required torque (current command signal Is) output from the host control circuit is input to the conversion circuit 18. The conversion circuit 18 uses the current command value obtained from the current command signal Is in phase with the induced voltage of each phase of the stator winding 5 based on the magnetic pole position information θ output from the three-phase two-phase conversion circuit 16. Are converted into current command values Isu, Isv, Isw for each phase corresponding to the sine wave output of the current or the phase shifted sine wave output. The current command values Isu, Isv, Isw of each phase output from the conversion circuit 18 are input to the current control system (ACR) 17 of the corresponding phase. Further, output signals Ifu, Ifv, Ifw output from the current sensor 13 of the corresponding phase are input to the current control system (ACR) 17 of each phase. The current control system (ACR) 17 of each phase includes the current value of each phase obtained from the output signals Ifu, Ifv, Ifw of the current sensor 13 of the corresponding phase and the current command values Isu, Isv, Isw of the corresponding phase. Based on the above, a drive signal for driving the switching semiconductor element of the arm of the corresponding phase is output.

  The drive signal output from the current control system (ACR) 17 of each phase is input to the control terminal of the switching semiconductor element that constitutes the arm of the corresponding phase. Thus, each switching semiconductor element is turned on / off, and the DC power supplied from the DC power source 12 is converted into AC power and supplied to the corresponding phase winding of the stator winding 5.

  In the inverter device of the present embodiment, the combined vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 is made to be orthogonal to the direction of the magnetic flux or magnetic field generated by the permanent magnet 6, or phase-shifted (fixed). The combined vector of the armature magnetomotive force generated by the current flowing through the child winding 5 advances through the stator winding 5 so as to advance 90 degrees (electrical angle) or more with respect to the direction of the magnetic flux or magnetic field generated by the permanent magnet 6. Current (phase current flowing through each phase winding) is always formed. Thereby, in the permanent-magnet-rotary electric machine apparatus of a present Example, the characteristic equivalent to a direct current machine can be acquired using the non-commutator (brushless) permanent-magnet-rotary electric machine 1. FIG. It should be noted that the stator winding 5 has a combined vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 so as to advance 90 degrees (electrical angle) or more with respect to the direction of the magnetic flux or magnetic field generated by the permanent magnet 6. Control that always forms a current flowing in each phase (phase current flowing in each phase winding) is called field weakening control.

  Therefore, in the permanent magnet rotating electrical machine apparatus of the present embodiment, the combined vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 is orthogonal to the direction of the magnetic flux or magnetic field generated by the permanent magnet 6. If the current flowing through the stator winding 5 (phase current flowing through each phase winding) is controlled based on the magnetic pole position of the rotor 3, the maximum torque can be continuously output from the permanent magnet rotating electrical machine 1. When field-weakening control is required, the resultant vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 is advanced 90 degrees (electrical angle) or more with respect to the direction of the magnetic flux or magnetic field generated by the permanent magnet 6. The current flowing through the stator winding 5 (phase current flowing through each phase winding) may be controlled based on the magnetic pole position of the rotor 3.

  Further, in the permanent magnet rotating electrical machine 1 of the present embodiment, the waveform of the voltage induced in each phase winding of the stator winding 5 becomes a sine wave. This is because the shape of the permanent magnet 6 in the permanent magnet rotating electrical machine 1 is a kamaboko shape as shown in the figure, and phase windings wound around the stator salient poles 42 of the same phase, for example, U1 +, U2-, U3 + This is because the phase windings wound around the respective stator salient poles 42 are configured so as to be mutually in positional relative to the permanent magnet 6 or out of phase with each other. For this reason, in the inverter device of the present embodiment, a sine wave current corresponding to the magnetic pole position of the rotor 3 is applied to each phase winding of the stator winding 5 by 180 degrees (electrical angle) with respect to the sine wave induced voltage. Energized. Therefore, in the permanent magnet rotating electrical machine apparatus according to the present embodiment, fluctuations in the output torque of the permanent magnet rotating electrical machine 1 can be kept small.

  In addition, the rotating electrical machine apparatus of the present embodiment that uses the 180-degree energization method for inverter control of the permanent magnet rotating electrical machine 1 has the following advantages over the rotating electrical machine apparatus that uses the 120-degree energization type inverter control.

  (1) When the permanent magnet rotating electrical machine 1 is used for positioning of the driven body, torque pulsation that occurs when the permanent magnet rotating electrical machine 1 is switched in phase can be suppressed.

  (2) It is possible to prevent the inverter control from becoming unstable due to the torque constant of the permanent magnet rotating electrical machine 1 changing depending on the magnetic pole position of the rotor 3.

  (3) By 180-degree section energization, inverter loss can be reduced and the operating efficiency of the permanent magnet rotating electrical machine 1 can be improved.

  (4) Since the 60-degree section can be identified, the minimum resolution can be improved. Therefore, when the output of the magnetic pole position sensor 11 is used for position control of the driven body by the permanent magnet rotating electrical machine 1 (for example, a rotation-linear motion conversion device is attached to the output end of the permanent magnet rotating electrical machine 1, When the output of the magnetic pole position sensor 11 is used as a signal for detecting the position of the driven body when the driven body is moved directly by converting the rotational force of the motor to the direct power) The positioning accuracy of the driving body can be improved.

  Further, in the rotating electrical machine apparatus of the present embodiment, since the Hall element or Hall IC that is a magnetic sensing element is used as the magnetic pole position sensor 11, the magnetic pole position is simple and inexpensive with respect to the magnetic pole position sensor such as a resolver. Can be detected.

  Further, in the rotating electrical machine apparatus of this embodiment, since the Hall element is attached to the stator core 4, the phase adjustment work between the induced voltage and the output of the Hall element or Hall IC is unnecessary, and the magnetic pole position sensor 11 is attached. Can work easily.

  Next, output correction of the magnetic pole position sensor 11 of the present embodiment will be described with reference to FIGS.

  FIG. 2 shows a circuit configuration of the sensor output correction circuit 15 of the present embodiment.

  The sensor output correction circuit 15 is constituted by a microcomputer (hereinafter referred to as “microcomputer”). The microcomputer constituting the sensor output correction circuit 15 may be provided separately from the microcomputer constituting the control circuit of the inverter device. Further, the sensor output correction circuit 15 may be constituted by a microcomputer constituting the control circuit of the inverter device. The latter is preferred for cost reduction.

  Output signals (analog signals) output from the magnetic pole position sensor 11 and the current sensor 13 are input to the sensor output correction circuit 15. Output signals of the magnetic pole position sensor 11 and the current sensor 13 are converted into digital signals by an A / D converter (not shown). Thereby, sensor output information θo (waveform data) of the magnetic pole position sensor 11 and sensor output information Io (waveform data) of the current sensor 13 can be obtained. The sensor output information θo of the magnetic pole position sensor 11 is input to the sensor output information correction unit 50. The sensor output information Io of the current sensor 13 is input to the sensor output correction information correction unit 51. The sensor output correction information correction unit 51 receives the sensor output correction basic information θab stored in the storage unit 52 in advance. The sensor output correction information correction unit 51 corrects the sensor output correction basic information θab according to the sensor output information Io of the current sensor 13. The sensor output correction basic information θab corrected by the sensor output correction information correction unit 51 is input to the sensor output information correction unit 50 as sensor output correction information θa. The sensor output information correction unit 50 corrects the sensor output information θo of the magnetic pole position sensor 11 based on the sensor output correction information θa, and the corrected sensor output information θo of the magnetic pole position sensor 11 is set to 3 as sensor correction output information θao. Output to the phase-to-phase conversion circuit 16. As described above, the three-phase / two-phase conversion circuit 16 calculates the magnetic pole position information θ from the sensor correction output information θao and outputs it to the conversion circuit 18.

  FIG. 3A shows an output waveform for one cycle of the electrical angle of the magnetic pole position sensor 11 in a state where no current is applied to the stator winding 5 without load. In the figure, the vertical axis represents the magnetic flux density (T), and the horizontal axis represents the electrical angle (degree) for one cycle.

  Here, each waveform shows the following waveform.

Waveform W _u1 : Output waveform of the U-phase Hu magnetic pole position sensor 11 Waveform W _v1 : Output waveform of the V-phase Hv magnetic pole position sensor 11 Waveform W _w1 : Output waveform of the W-phase Hw magnetic pole position sensor 11 Waveform W _d1: waveform W _u1, W _v1, W _w1 two orthogonal output waveform waveforms of the d-axis direction when converted to the axis W _q1: waveform W _u1, W _v1, q axis when converting the W _w1 to two orthogonal axes As is apparent from the figure, the magnetic pole position sensor 11 of each phase outputs a sinusoidal waveform of the same amplitude having a phase of 120 degrees in electrical angle between adjacent phases.

  FIG. 3B shows an output waveform corresponding to one cycle of the electrical angle of the magnetic pole position sensor 11 in a state where the stator winding 5 is energized with a load, and a stator current influencing component included in the output waveform of the magnetic pole position sensor 11. The waveform for one electrical angle cycle and the output waveform for one electrical angle cycle after correction of the magnetic pole position sensor 11 are shown. In the figure, the vertical axis represents the magnetic flux density (T), and the horizontal axis represents the electrical angle (degree) for one cycle. The left vertical axis corresponds to the output waveform of the magnetic pole position sensor 11 and the output waveform after correction of the magnetic pole position sensor 11. The right vertical axis corresponds to the waveform of the stator current influence component included in the output waveform of the magnetic pole position sensor 11. The digit on the right vertical axis is smaller than the digit on the left vertical axis and is one digit different.

  In this embodiment, in order to investigate the influence of the energization of the stator winding 5 on the magnetic pole position sensor 11, the magnetic pole position sensor 11 when the same current is passed through the stator winding 5 with the permanent magnet 6 removed. The output waveform is obtained by finite element analysis.

  Here, each waveform shows the following waveform.

Waveform W _u2 : Output waveform of U-phase Hu magnetic pole position sensor 11 Waveform W _v2 : Output waveform of V-phase Hv magnetic pole position sensor 11 Waveform W _w2 : Output waveform of W-phase Hw magnetic pole position sensor 11 Waveform W _u3: waveform W _u2 waveform waveform W _v3 showing the stator current influence component contained: waveform W _v2 waveform waveform showing the stator current influence component contained in W _w3: the stator current influence component contained in the waveform W _w2 waveform waveform W _u4 shown: waveform W _u2 output waveform a waveform after correction to remove the waveform W _u3 minutes from W _v4: output waveform waveform after correction to remove the waveform W _v3 minutes from the waveform W _v2 W _w4: from the waveform W _w2 The corrected output waveform after removing the waveform W _w3 The linearity of the magnetic flux is maintained in a so-called surface magnet type rotating electrical machine in which the permanent magnet is on the outer peripheral surface of the rotor. Therefore, the output waveform of the magnetic pole position sensor 11 to remove the influence of the current supplied to the stator coil 5, an output waveform W _u2, W _v2, W _w2 of load of the magnetic pole position sensor 11, an output waveform W _u2 , W _v2 , W _w2 included in the stator current influence component waveforms W _u3 , W _v3 , W _w3 are corrected waveforms W _u4 , W _v4 , W _w4 . Thereby, since the output waveform of the magnetic pole position sensor 11 in a substantially no-load state can be output, the detection accuracy of the magnetic pole position sensor 11 can be improved.

  FIG. 3C shows, in waveform, an error for one electrical angle cycle between the calculated angle and the actual angle when the output waveform of the magnetic pole position sensor 11 is corrected and when it is not corrected. In the figure, the vertical axis represents the angle error (degree), and the horizontal axis represents the electrical angle (degree) for one cycle.

  Here, each waveform shows the following waveform.

Waveform W ₁ : Waveform indicating an error when the output waveform of the magnetic pole position sensor 11 is corrected Waveform W ₂ : Waveform indicating an error when the output waveform of the magnetic pole position sensor 11 is not corrected An average error is obtained when no load is applied. In some cases, it was 0.56 degrees (electrical angle), but in the case where no correction was made at the time of load, it was 0.97 degrees (electrical angle). On the other hand, the error was 0.57 degrees (electrical angle) when corrected during loading. As is clear from these results, in this embodiment, the detection accuracy of the magnetic pole position sensor 11 can be improved.

  From the above, in the present embodiment, the stator current influence component information for one electrical angle cycle included in the output waveform of the magnetic pole position sensor 11 when an arbitrary current is passed through the stator winding 5 is the sensor output correction basis. It is stored in the storage unit 52 as information θab. In the present embodiment, the sensor output correction information correction unit 51 corrects the stored stator current affecting component information based on the output information of the current sensor 13, and the corrected stator current affecting component information is detected by the sensor. The output correction information θa is output to the sensor output information correction unit 50. That is, a ratio (for example, 0.5) of the output information (for example, 50 A) of the current sensor 13 to the stator current information (for example, 100 A) when the stator current-influencing component information is obtained is multiplied by the stator current-influencing component information. Stator current affecting component information is corrected and output. In this embodiment, the sensor output information correction unit 50 corrects the sensor output information θo of the magnetic pole position sensor 11 based on the corrected stator current influence component information, and outputs this as sensor correction output information θao. is doing.

  The error having a cycle of two cycles in the electrical angle at no load occurs because the gap length of the stator salient pole 44 with respect to the rotor core 7 is larger than the gap length of the stator salient pole 42 with respect to the rotor core 7. This is considered to be caused by magnetic fluctuation (resulting in cogging torque).

  Even in such a case, the detection accuracy of the magnetic pole position sensor 11 is further improved by storing the information on the influence component by the stator salient pole 44 in the sensor output correction circuit 15 and appropriately correcting the output information of the magnetic pole position sensor 11. Can be made.

  According to the present embodiment described above, since the sensor output correction circuit 15 for correcting the output information of the magnetic pole position sensor 11 is provided, all or an error amount due to the influence of the leakage magnetic flux generated by the stator winding 5 is provided. Many can be removed from the output information of the magnetic pole position sensor 11. Thereby, according to the present embodiment, the magnetic pole position information θ is obtained from the sensor correction output information θao from which all or most of the error due to the influence of the leakage magnetic flux generated by the stator winding 5 is removed, and the permanent magnet The current supplied to the rotating electrical machine 1 can be controlled. Therefore, according to the present embodiment, the output error of the magnetic pole position sensor 11 due to the influence of the leakage magnetic flux generated by the stator winding 5 is reduced, and the generation of the pulsating torque of the permanent magnet rotating electrical machine 1 due to the influence of the output error is suppressed. be able to. Therefore, according to the present embodiment, even when the magnetic pole position sensor 11 is disposed in the vicinity of the stator winding 5 because of its small size, the drive control of the permanent magnet rotating electrical machine 1 by the accurate magnetic pole position can be performed. A small and high performance rotating electrical machine can be provided.

Further, according to the present embodiment, the opposing distance from the rotor core 7 at the magnetic pole center at the tip of the stator salient pole 44 is greater than the opposing distance from the rotor core 7 at the magnetic pole center at the tip of the stator salient pole 42. The stator salient pole 44 is formed so as to be larger, and the magnetic pole position sensor 11 is disposed in the gap between the rotor iron core 7 and the opposite side of the stator salient pole 44 facing the rotor iron core 7. Since the position sensor 11 is fixed to the protruding end of the stator salient pole 44, the magnetic pole position sensor 11 is not subjected to machining such as notches or grooves that cause magnetic fluctuations in the magnetic circuit. It can be fixed to the pole 44. As a result, according to the present embodiment, high-cycle magnetic fluctuations that occur in the magnetic circuit due to the processing of the stator salient poles 44 can be suppressed, and magnetic fluctuations from the magnetic circuit to the magnetic pole position sensor 11 can be suppressed. . Therefore, according to the present embodiment, it is possible to reduce the magnetic fluctuation caused by the mounting structure of the built-in magnetic pole position sensor 11, and to suppress the decrease in output accuracy of the magnetic pole position sensor 11 due to the influence of the magnetic fluctuation. . Therefore, according to the present embodiment, highly accurate output information can be supplied to the inverter device as the output information of the magnetic pole position sensor 11 used for drive control of the permanent magnet rotating electrical machine 1, which is suitable for the built-in magnetic pole position sensor 11. A permanent magnet rotating electrical machine 1 can be provided.

  Further, according to the present embodiment, as described above, since the notch or the groove that causes the magnetic fluctuation in the magnetic circuit is not processed on the stator salient pole 44, no torque is generated in the position sensor arrangement portion. The proportion of the portion is small, and the torque generated by the rotating electrical machine can be increased as compared with the case where the stator salient pole 44 is processed. The above configuration is particularly suitable for a rotating electric machine having the same iron core shape in the axial direction and long in the axial direction.

  In the present embodiment, the case where the magnetic pole position sensor 11 is arranged on the gap surface of the stator salient pole 44 and magnetic leakage of the permanent magnet 6 is detected has been described as an example. The magnetic leakage of the permanent magnet 6 may be detected at the end of the permanent magnet 6 in the axial direction, and the same effect as when the magnetic pole position sensor 11 is arranged on the gap surface of the stator salient pole 44 is obtained. Can do.

  Next, the configuration of an electric brake system to which the rotating electrical machine apparatus of the present embodiment is applied will be described with reference to FIG.

  An automobile equipped with the electric brake system (hereinafter referred to as “EB system”) of the present embodiment transmits the driving force output from the engine which is an internal combustion engine to the left and right via the transmission T / M and the differential mechanism DEF. This is a front-wheel drive vehicle that transmits to the front-wheel drive shaft, rotationally drives the front wheels, and drives the vehicle. The EB system of this embodiment is provided with left and right front wheels.

  In this embodiment, the case where the EB system is installed on the front wheel will be described as an example. The installation location of the EB system may be a rear wheel or front and rear wheels.

  In an automobile, the axle 102 is supported by an arm 101. A disc rotor 103 is provided on the axle 102. On both sides of the disk rotor 103, brake pads 107 supported so as to be movable in the axial direction are provided. The brake pad 107 is provided so as to sandwich the rotating surface of the disc rotor 103 from both sides. The braking force is generated when the brake pad 107 presses the rotating surface of the disk rotor 103 from both sides.

  The brake pad 107 operates with the rotational torque of the permanent magnet rotating electrical machine 1. The rotational torque of the permanent magnet rotating electrical machine 1 is transmitted to the power conversion mechanism (rotation-linear motion conversion mechanism) 105 via the rotating electrical machine rotating unit 110 including the permanent magnet 6 and converted into direct power. The direct power is given as a propulsive force to the piston 108 movably supported by the support mechanisms 109 and 111. The piston 108 operates the brake pad 107 with a given driving force, and presses the rotating surface of the disk rotor 103 from both sides.

  The permanent magnet rotating electrical machine 1 is disposed inside a caliper main body 104 that constitutes a braking force generator (caliper) that is movably supported by a support. A caliper claw 106 extending from the caliper main body 104 is provided at one end of the caliper main body 104 so as to straddle the brake pad 107.

  The permanent magnet rotating electrical machine 1 is controlled by a control device (not shown). The EB system uses a vehicle-mounted battery as a power source. The control device is an inverter device, and based on the torque command from the brake control device, the DC power supplied from the in-vehicle battery is changed to multiphase AC power so that the output torque of the permanent magnet rotating electrical machine 1 becomes the target torque. It is converted and supplied to the permanent magnet rotating electrical machine 1. The brake control device receives signals such as the amount of depression of the brake pedal and the driving state of the vehicle, calculates the required braking force of each front wheel from this input signal, and uses the calculated required braking force as the permanent magnet rotating electric machine. Is converted to a torque command value of 1 and output to the inverter device.

  According to the present embodiment, since the small and high performance rotating electrical machine apparatus including the permanent magnet rotating electrical machine 1 having the built-in magnetic pole position sensor and the sensor output correction circuit is applied to the EB system, the EB system is reduced in size and weight. High accuracy and high response.

  Further, the EB system can be made smaller and lighter than a brake system using a conventional hydraulic mechanism, so that a decrease in riding comfort due to an increase in unsprung load of the vehicle can be suppressed. It can also contribute to improvement.

  In the above description, the case where the rotating electrical machine apparatus of the present embodiment is applied to the EB system has been described as an example. The rotating electrical machine apparatus of the present embodiment can also be applied as an actuator for driving a clutch of an automatic manual transmission that changes the rotational force of a power device such as an engine, and can provide a small, lightweight, and highly accurate automatic manual transmission system. Furthermore, if a 180-degree energization method is adopted as the control method of the rotating electrical machine apparatus of the present embodiment, further miniaturization, light weight and high accuracy can be realized.

  A second embodiment of the present invention will be described with reference to FIG.

  FIG. 7 shows the configuration of the permanent magnet rotating electric machine of this embodiment. The same parts as those in FIG. 4 are denoted by the same reference numerals, and the description thereof is omitted.

  Between the 9 poles of the stator salient pole 42 around which the stator winding 5 is wound and the 8 poles of the rotating magnetic pole formed by the permanent magnet 6 under the influence, the cogging torque which is the least common multiple thereof is provided. That is, a cogging torque of 72 cycles per rotation is generated. The cogging torque decreases as the number of cycles increases. Therefore, the cogging torque generated in the relationship between the stator salient pole 42 and the permanent magnet 6 under the influence is small. However, the least common multiple is 10 between one pole of the stator salient pole 44 around which the stator winding 5 is not wound and ten poles of the rotating magnetic pole constituted by the permanent magnet 6, that is, ten cycles per one rotation. A large cogging torque (the same number of cycles as the number of rotating magnetic poles) is generated. For this reason, the total cogging torque of the permanent magnet rotating electrical machine 1 is increased.

  Therefore, in this embodiment, a cogging torque having a phase component opposite to that of the cogging torque component having the number of pole cycles of the permanent magnet 6 per rotation generated between the stator salient poles 44 and the permanent magnet 6 is fixed. A cogging torque generated between the stator salient pole 42 and the permanent magnet 6 under the influence thereof and generated between the stator salient pole 44 and the permanent magnet 6 and having the number of pole cycles of the permanent magnet 6 per rotation. The total cogging torque of the permanent magnet rotating electrical machine 1 is reduced by canceling out the cogging torque component by the cogging torque of the reverse phase component.

  Specifically, the surface (gap surface) facing the rotor 3 at the tip of the V2-stator salient pole 42 is more than the surface (gap surface) facing the rotor 3 at the tip of the other stator salient pole 42. The gap dimension between the inner peripheral surface of the protruding end of the V2-stator salient pole 42 and the outer peripheral surface of the rotor 3 is set so that the inner diameter of the other stator salient poles 42 It is made larger than the space | gap dimension between a surrounding surface and the outer peripheral surface of the rotor 3. FIG. As a result, in this embodiment, it is possible to generate a magnetic fluctuation that generates a cogging torque of a reverse phase component, and the pole of the permanent magnet 6 per rotation generated between the stator salient pole 44 and the permanent magnet 6. The cogging torque component having several cycles can be reduced, and the total cogging torque of the permanent magnet rotating electrical machine 1 can be reduced.

  Therefore, according to the present embodiment, the magnetic fluctuation caused by the mounting structure of the built-in magnetic pole position sensor 11 can be reduced, and the generation of pulsating torque due to the influence of the magnetic fluctuation can be suppressed. Even if 11 is built in the permanent magnet rotating electrical machine 1, it is possible to suppress deterioration of the characteristics of the permanent magnet rotating electrical machine 1. Therefore, according to the present embodiment, it is possible to provide a high-performance permanent magnet rotating electrical machine 1 incorporating the magnetic pole position sensor 11.

  In this embodiment, the cogging torque of the antiphase component is generated by one stator salient pole 42. However, the cogging torque of the antiphase component may be generated by balancing with the plurality of stator salient poles 42. I do not care.

  In the present embodiment, the case where the cogging torque of the antiphase component is generated by the stator salient pole 42 has been described as an example. As a method of reducing the cogging torque generated between the stator salient pole 44 and the permanent magnet 6 and having the number of poles of the permanent magnet 6 per rotation, the width of the magnetic pole of the stator salient pole 44 (adjacent fixed The cogging torque may be reduced by appropriately adjusting the width between the portions closest to the child salient poles 42).

  In the above two embodiments, the case where the magnetic pole position sensor 11 is attached to the stator 2 having the stator salient pole 44 around which the stator winding 5 is not wound has been described as an example. The magnetic pole position sensor 11 may be arranged on the stator 2 having only the stator salient pole 42 having the line 5. In this case, the magnetic pole position sensor 11 may be disposed between the stator salient poles 42 or may be disposed in a gap between the projecting ends of the stator salient poles 42 and the rotor 3. In the case where the magnetic pole position sensor 11 is disposed in the gap between the protruding end of the stator salient pole 42 and the rotor 3, the magnetic pole position sensor is used in order to minimize the decrease in torque of the permanent magnet rotating electrical machine 1. The gap between the projecting end of the stator salient pole 42 and the rotor 3 may be increased only in the axial section where 11 is disposed.

  Further, in the above two embodiments, the explanation has been given by taking the inner rotation type permanent magnet rotating electric machine as an example. An abduction type may be used as the permanent magnet rotating electric machine.

  Further, in the above two embodiments, concentrated winding has been described as an example of the winding method of the stator winding. The winding method of the stator winding may be distributed winding.

  Furthermore, in the above two embodiments, the magnetic pole position sensor constituted by the Hall element or Hall IC has been described as an example. Other magnetoresistive elements may be used as the magnetic pole position sensor. Even in such a case, the effects described in the above two embodiments can be achieved.

The circuit block diagram which shows the structure of the rotary electric machine apparatus which is 1st Example of this invention. The block diagram which shows the structure of the sensor output correction circuit of FIG. The wave form diagram which shows the operation | movement principle of the rotary electric machine apparatus of FIG. Sectional drawing which shows the structure of the permanent magnet rotary electric machine which comprises the rotary electric machine apparatus of FIG. Sectional drawing which shows the structure of the permanent magnet rotary electric machine which comprises the rotary electric machine apparatus of FIG. The fragmentary sectional view which shows the structure of the electric brake device carrying the rotary electric machine apparatus of FIG. Sectional drawing which shows the structure of the permanent magnet rotary electric machine which comprises the rotary electric machine apparatus which is 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Permanent magnet rotary electric machine, 2 ... Stator, 3 ... Rotor, 4 ... Stator iron core, 5 ... Stator winding, 6 ... Permanent magnet, 11 ... Magnetic pole position sensor, 15 ... Sensor output correction circuit, 42, 44: Stator salient pole.

Claims (8)

An electric machine with a built-in sensor for detecting the position of the movable magnetic pole;
A control device for controlling the drive of the electric machine;
Sensor output information correction means for correcting the output information output from the sensor,
The sensor output information correction unit corrects the output information of the sensor in accordance with sensor output correction information for correcting the output information of the sensor, and uses the corrected output information as sensor correction output information to the control device. Output
The control device obtains information on the movable magnetic pole position from the sensor correction output information and controls a current supplied to the electric machine. The electromechanical device according to claim 1,
The sensor output correction information includes information on the influence of the supply current included in the output information output from the sensor during load operation of the electric machine when supplying an arbitrary current, and information on the current supplied to the electric machine. An electromechanical device generated based on the above. A stator whose magnetic path is constituted by an iron core with windings;
A mover having a plurality of magnetic poles composed of a plurality of permanent magnets;
A sensor for detecting the position of the magnetic pole,
The iron core is
A plurality of magnetic path salient poles that the winding is wound to form the magnetic path;
And at least one sensor mounting salient pole provided for mounting the sensor,
The plurality of magnetic path salient poles and the sensor mounting salient pole have a projecting shape toward the mover,
The sensor mounting salient pole is formed such that the distance between the magnetic pole salient pole and the mover is larger than the distance between the magnetic path salient pole and the movable element.
The sensor is disposed in a space between the movable element facing the movable element at a protruding end of the sensor mounting salient pole and fixed to the protruding end of the sensor mounting salient pole. Electric machine with built-in position sensor. In the electric machine with a built-in magnetic pole position sensor according to claim 3,
The magnetic path salient pole is provided with means for generating a magnetic fluctuation having a component opposite to the magnetic fluctuation caused by the magnetic balance between the sensor mounting salient pole and the mover. Electric machine with built-in position sensor. In the electric machine with a built-in magnetic pole position sensor according to claim 4,
The magnetic fluctuation generating means is configured such that, of the plurality of magnetic path salient poles, the opposing distance to the movable element at the pole center portion of the salient end of at least one magnetic path salient pole is the pole of the salient end of another magnetic path salient pole. An electric machine with a built-in magnetic pole position sensor, which is applied to the magnetic path salient pole by forming the magnetic path salient pole so as to be larger than the opposing distance to the movable element in the central portion. A stator whose magnetic path is constituted by an iron core with windings;
A mover having a plurality of magnetic poles composed of a plurality of permanent magnets;
A sensor for detecting the position of the magnetic pole,
The iron core is
A plurality of magnetic path salient poles that the winding is wound to form the magnetic path;
And at least one sensor mounting salient pole provided for mounting the sensor,
The magnetic path salient pole is provided with means for generating a magnetic fluctuation having a component opposite to the magnetic fluctuation caused by the magnetic balance between the sensor mounting salient pole and the mover. Electric machine with built-in position sensor. The electric machine with a built-in magnetic pole position sensor according to claim 6,
The magnetic fluctuation generating means is configured such that, of the plurality of magnetic path salient poles, the opposing distance to the movable element at the pole center portion of the salient end of at least one magnetic path salient pole is the pole of the salient end of another magnetic path salient pole. An electric machine with a built-in magnetic pole position sensor, which is applied to the magnetic path salient pole by forming the magnetic path salient pole so as to be larger than the opposing distance to the movable element in the central portion. In an in-vehicle electric system that generates electric power for driving a vehicle or driving an in-vehicle electric device using electric power of an in-vehicle power source,
An electric machine that generates the electric force and includes a sensor for detecting the position of the movable magnetic pole;
A control device for controlling the drive of the electric machine;
Sensor output information correction means for correcting the output information output from the sensor,
The sensor output information correction unit corrects the output information of the sensor in accordance with sensor output correction information for correcting the output information of the sensor, and uses the corrected output information as sensor correction output information to the control device. Output
The controller is
A power conversion device that converts power supplied from a vehicle-mounted power source into predetermined power and supplies the electric machine,
An in-vehicle electric machine system that obtains information on the movable magnetic pole position from the sensor correction output information and controls a current supplied to the electric machine.

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