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Permanent-magnetic motor and elevator device

A motor, permanent magnet technology, used in electromechanical devices, synchronous motors with stationary armatures and rotating magnets, and electric components, etc., can solve the problem of reduced motor efficiency, increased vibration and noise, and increased meshing torque. problems, to achieve the effect of reducing torque ripple, reducing vibration and noise, and reducing meshing torque

Inactive Publication Date: 2005-04-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the meshing torque becomes larger, so the torque ripple increases, the efficiency of the motor decreases, and at the same time, the vibration and noise become larger, which is problematic

Method used

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  • Permanent-magnetic motor and elevator device
  • Permanent-magnetic motor and elevator device
  • Permanent-magnetic motor and elevator device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Refer below Figure 1 to Figure 8 A first embodiment of the present invention applied to a hoist for an elevator system will be described. first, image 3 The schematic structure of the elevator apparatus is shown. Should image 3 Among them, the car 12 and the counterweight loading part 13 are formed in the lifting passage 11 to move up and down along the first and second guide rails 14 and 15, respectively. The bottom of described car 12 is fixedly equipped with 2 moving pulleys 16.

[0033] A winch 17 is arranged on the upper part of the weight loading part 13, and a counterweight 18 is installed on the lower part. The hoist 17 is housed in a box 13 a provided on the upper portion of the counterweight loading unit 13 .

[0034] On the other hand, an intermediate pulley 19 is arranged near the top of the lifting passage 11, and a cable 20 is hung on the intermediate pulley 19. One end of the cable 20 is fixed near the top of the guide rail 14, and the other end i...

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PUM

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Abstract

The motor 23 of a hoist is equipped with a rotor core 33 having incorporated therein permanent magnets 37 for forming magnetic poles. The inner peripheral surface of each magnetic pole of the rotor core 33 is convex so that a gap between it and a stator core 26 is smaller in the vicinity of the center of the magnetic pole and larger in the peripheral opposite ends. More specifically, of the inner peripheral surface of each magnetic pole, the central portion is a planar portion 33a and the peripheral opposite ends are arcuate surface portions 33b. As a result, the magnetic flux distribution between the rotor core 33 and the stator core 26 approximates closely to a sine wave form, reducing the cogging torque.

Description

technical field [0001] The present invention relates to a permanent magnet motor, specifically, to a permanent magnet motor suitable for being assembled into a hoist of an elevator device and an elevator device using the permanent magnet motor. Background technique [0002] Figure 14 An example of a conventional permanent magnet motor is shown. The motor is, for example, a 3-phase 20-pole brushless motor, which is rotatably arranged on the stator 1 ( Figure 14 Only the stator core 2 is shown, and the rotor 3 on the outer peripheral portion of the stator coil is omitted, and the plate-shaped permanent magnet 6 is inserted into the through-hole 5 provided at each magnetic pole forming part of the rotor core 4 to form. Each permanent magnet 6 is magnetized in the radial direction so that S poles and N poles are at alternating positions in the circumferential direction. [0003] In this case, the size of the gap between the rotor core 4 and the stator core 2 is fixed along th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K21/22H02K29/03
CPCH02K1/2786H02K21/22H02K29/03H02K1/2791
Inventor 串平孝信永田正人后藤真也
Owner KK TOSHIBA