JP2627717B2 - High speed electric drive wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric drive wheel having a low-speed and high-torque motor structure in which the wheel itself is formed as a rotor of an electric motor, particularly a high rotational speed for a vehicle requiring a high rotational speed wheel. Type electric drive wheels.

[0002]

2. Description of the Related Art Conventionally, an electric drive vehicle has many demands due to advantages such as low noise and no exhaust, but has a problem in acceleration at start, that is, low instantaneous torque, and hence rapid startability. Accordingly, the present applicant has previously invented and succeeded in an electric drive type vehicle having a structure in which magnets are mounted on wheels made of non-magnetic material at equal circumferential intervals, and several electromagnets are arranged in a non-rotating vehicle body. However, under the condition of high rotation speed, the number of rotating magnets passing through one electromagnet per hour increases, so that the current switching time to the electromagnet is shortened. In particular, the self-inductance generated at the moment of turning on and off the current. Then, the time constant of the electromagnet circuit becomes a problem.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a non-rotating side electromagnet and a corresponding rotating side magnet in a double row (two rows or three rows, etc.) arc shape (in the case of an electromagnet) or a circle. The current switching time can be extended by circumferentially disposing the magnets per row to reduce the number of magnets per row, thereby reducing the self-induced electromotive force as described below.

[0004]

An example of the output torque of the electrically driven wheels, the specification of the electromagnet and the magnet, the control, the acceleration, the structure, and the like (including the calculation formula) has already been filed by the same applicant as the present applicant. 88960, Japanese Patent Application No. 3-3525
45, the details are omitted. The operation of the high rotational speed type electric drive wheel of the present invention will be described. As an example, as shown in FIGS. 1 and 2, magnets of the rotating wheel are arranged in two or three rows in a circumferential shape, and the corresponding electromagnets The number of magnets per row is 1 in a single row if the output torque is equivalent to that in a single row by using two or three rows.
Since the current can be reduced to about 1/2 or 1/3, the rise time dt of the current can be increased per electromagnet at the same rotation speed as a single row, and the self-induced electromotive force V in the following equation can be reduced. Can be. (Start-up time), that is, self-induced electromotive force Vm equivalent to a single row
If it is allowed up to ax, it is twice the single row, 3 Thus, the efficiency can be increased, the rotation fluctuation can be reduced, and stable rotation can be obtained. Of course, the electromagnet is designed optimally including other conditions in order to reduce the self-inductance L, the time constant, and the like, and the self-induced electromotive force is suppressed low by using the rotating wheel according to the configuration of the present invention. High rotation speed was made possible.

[0005]

As is apparent from the above description, the electric drive wheel according to the present invention is as shown in FIGS. The second row is placed where the angle is added, and the total number is the same as that of a single row. Therefore, even at a low rotation speed, the rotation fluctuation is small and the rotation is stable. Since the number is small, the self-induced electromotive force per electromagnet can be kept low and a high rotational speed can be achieved, which not only solves the problem of the rapid startability of the conventional electric drive vehicle but also reduces the low rotational speed range. It can be said that it is possible to design a vehicle having stable rotation from a high speed range to a high speed range.

[Brief description of the drawings]

FIG. 1 is a side view of the periphery of a rotating wheel 1 showing a radius γ ₁ of the rotating wheel.
10 magnets 3 on the circumference of the circle, central angle β ₁ = 2π / 10r
ad. In equal intervals, ten magnet 3 on the circumference of radius gamma _2, central angle beta ₁ rad. Arms 7 equally mounted and integrally mounted on a non-rotating shaft 6 fixed to the vehicle body 2 coaxially with the rotating wheel 1
Of the electromagnet 4 on the radii γ ₁ , γ ₂ of the center angle β ₂ = 2π / 8
rad. Equidistantly in respective first row second column to the beta _1/2, beta
_2/2 increments shifting and deploy a flowchart showing a phase relationship between the magnet and the electromagnet.

FIG. 2 is a layout diagram showing an example of a first to third row relationship in a case where magnets 3 are arranged in three rows around a rotating wheel 1;

[3] shows the installation relationship and structure of the electromagnet of the magnet 3 and electromagnet 4 and the magnetic sensor 5 in a sectional view along the circumference of radius gamma ₁ near the wheel and the car body top.

FIG. 4 is a sectional view in a radial direction taken along arrows Z to Z in FIG. 3;

FIG. 5 is a cross-sectional view of a wheel having a structure in which a planetary gear transmission 21, a slip clutch 22 such as a torque converter, and a clutch 23 are integrated and built in an electrically driven wheel in a radial direction.

6 is a development view based on FIG. 3, showing magnets 3-1 and 3-
3, 3-5 (total number is 10 up to 3-19) and 3-2, 3
-4 (the total number is 10 to 3-20) and electromagnets 4-1 and 4
-3 and 4-2, 4-4 (only four are shown), magnetic sensors 5-1 to 5-4, semiconductor 8 for current switching, and timer 1
1, the semiconductor switch 9 and the battery 10 are shown, and the relationship of the sequential operation is shown. 8 to 11 may operate two rows sequentially in one set.

[Explanation of symbols]

1 ... rotating wheel 2 ... car body part 3 (3-1 to 3-20) ... magnet 4 (4-1 to 4) 4-4) Electromagnet 5 (5-1 to 5-4) Magnetic sensor 6 Non-rotating shaft 7 Non-rotating shaft 7 … Arm (non-rotating) 8… Current switch semiconductor 9… Semiconductor switch 10… Semiconductor switch 10 ………………………… Battery 11: Timer 21: Planetary gear transmission 22: Slip clutch, such as Colton 23: ………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Splines

Claims (1)

(57) [Claims] 1. A plurality of electromagnets integrally arranged in a non-rotating part of a car in a double row in an arc shape or a circumferential shape, and on both sides or one side at positions corresponding to the electromagnets, and minute A rotating wheel composed of a non-magnetic material in which a plurality of magnets are equidistantly mounted on the circumference so as to be in contact with each other while maintaining a gap, and a magnetic sensor that senses the magnetic poles and positions of the rotating magnets and activates a current switching semiconductor. A high-rotation speed electric drive wheel for controlling the rotation speed of the wheel by switching the polarity of the current to generate a driving force by converting the magnetic pole of the electromagnet and controlling the intermittent time and the amount of electricity of the current. .