JP2020089039A5

JP2020089039A5 -

Info

Publication number: JP2020089039A5
Application number: JP2018219546A
Authority: JP
Filing date: 2018-11-22
Publication date: 2022-01-04

Claims

An embedded permanent magnet type rotary electric machine including a rotor including a rotor core and a stator.
The rotor core is
Magnet insertion holes that are longer in the circumferential direction than in the radial direction in each magnetic pole,
The magnet stoppers on the inner peripheral sides of both ends of the magnet insertion hole,
The gap on the outer peripheral side of the magnet stop and
The bridge portion on the outer peripheral side of the gap and
The q-axis core between the adjacent magnet insertion holes and
A rectangular magnet accommodating portion between the magnet stoppers at both ends of the magnet insertion hole,
The umbrella-shaped core on the outer peripheral side of the magnet accommodating portion and
The first connection between the umbrella-shaped core and the bridge, and
Includes a second connection between the q-axis core and the bridge.
The outer peripheral portion of the rotor core sandwiched between two virtual q-axis straight lines passing through both ends of the minimum width Wq in the q-axis vertical direction of the q-axis core has a radius substantially equal to the rotor radius centered on the rotation axis. On the circle,
The outer contour of the core of the umbrella-shaped core, the first connection portion, and the bridge portion is formed by an arc.
The width Wb of the bridge portion is smaller than the radial length Tmg / 2 of the magnet accommodating portion.
The radial thickness Hc of the magnetic pole center of the umbrella-shaped core is 0.5 to 1.0 times the radial thickness Hcm of the virtual arc when the central angle of the arc is expanded until it reaches the magnetic pole pitch end. In range,
The central angle of Wq is in the range of 0.4 to 0.9 times π / (3 * number of poles).
The Wq is in the range of 1.15 to 2.5 times that of the Hc.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1.
A first system winding connected to a first drive circuit containing one or more three-phase inverters, and
An embedded permanent magnet rotary machine that further comprises a second system winding connected to a second drive circuit that includes one or more three-phase inverters.

The embedded permanent magnet type rotary electric machine according to claim 1.
The rotor core has a shape symmetrical with respect to the magnetic pole center line and has a shape.
The number of poles the embedded permanent magnet type rotating electric machine, eight poles, 10 poles, is whether 12-pole or 14-pole have deviation,
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1 or 2.
The outer circumference of the rotor core is a perfect circle.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1 or 2.
The outer contour of the core of the umbrella-shaped core, the first connection portion, and the bridge portion is formed by an arc, and the radius of the arc is less than the radius of the rotor.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1 or 2.
A groove is provided on the outer periphery of the center of the magnetic pole, and a groove is provided.
The umbrella-like core excluding the groove, the first connecting portion, the core outer peripheral profile of the bridge portion is Ru is formed in a circular arc,
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1 or 2.
The Hc is in the range of 0.55 to 0.9 times the Hcm.
The central angle of Wq is in the range of 0.5 to 0.75 times π / (3 * number of poles).
The Wq is in the range of 1.2 to 2.1 times the Hc.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 2.
The first system winding and the second system winding are distributed around the stator core and are arranged separately on the inner peripheral side and the outer peripheral side of the stator core.
The current phase difference between the first system winding and the second system winding is in the range of 24 ° to 36 °.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1.
The first system winding connected to the first inverter,
The second system winding connected to the second inverter,
The third system winding connected to the third inverter,
Further includes a fourth system winding connected to a fourth inverter,
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 1 or 2.
Let Tb be the thickness of the electrical steel sheet forming the laminated core.
Hc-Wb + Tb / 2 is in the range of 0.5 to 0.8 times the above-mentioned Hcm, and is in the range of 0.5 to 0.8 times.
The Wq is in the range of 0.4 to 0.9 times the π * rotor radius / (3 * number of poles).
The Wq is in the range of 1.2 to 2.5 times that of Hc-Wb + Tb / 2.
An embedded permanent magnet type rotary electric machine that is characterized by this.

The embedded permanent magnet type rotary electric machine according to claim 10.
The central angle of the length Wmg on the outer peripheral side of the magnet accommodating portion is in the range of 7/8 to 1 times 4π / (3 * number of poles).
Central angle distance We between the outer peripheral side end point and the q-axis core outer circumferential portion of the magnet housing section is a π / (3 * number of poles) of 0.5 times or more,
The bridge portion has a substantially constant width Wb and has a substantially constant width Wb.
The central angle of the length of the bridge portion is (π / 6 * number of poles) * 0.6 or more.
The Wb is less than or equal to the Tb.
An embedded permanent magnet type rotary electric machine that is characterized by this .

An electric auxiliary machine system for an automobile, comprising the embedded permanent magnet type rotary electric machine according to claim 1 or 2, wherein electric power steering or electric braking is performed by using the embedded permanent magnet type rotary electric machine.