Motor

专利摘要:
PURPOSE: A motor is provided to measure the speed of the shaft and control rotation of the shaft in an accurate manner without being influenced by the change of the magnetic field caused due to the ripple of DC power. CONSTITUTION: A motor comprises a cylindrical casing(1); a stator(2); a rotor(3) which rotates when A/C power is applied to the stator; a shaft(4) mounted to the rotor; a braking unit(5) for braking the shaft when D/C power is applied to the braking unit; a permanent magnet(61) fixed to the shaft; a generator(62) for generating current when the permanent magnet rotates; and a control unit(9) for controlling D/C power being supplied to the braking unit, by measuring voltage of the generator. The shaft is made of a non-magnetic material.
公开号:KR20030028894A
申请号:KR1020010061183
申请日:2001-10-04
公开日:2003-04-11
发明作者:심재덕
申请人:(주)우진써보；
IPC主号:

专利说明:

Motor
[8] The present invention relates to a motor, and more particularly, to a speed control motor that measures the rotational speed of the motor to control the motor to maintain an accurate rotational speed.
[9] The speed control motor according to the prior art includes a stator supplied with A / C power, a rotor rotated when power is supplied to the stator, a shaft penetrated and fixed to the rotor, and a speed measuring means for measuring the rotational speed of the shaft. And a braking means for braking the shaft, and a controller for controlling the power applied to the braking means according to the rotational speed of the shaft measured by the speed measuring means, the rotational speed of the shaft measured by the speed measuring unit. According to the control the power supplied to the braking means so that the shaft can be rotated at a constant speed.
[10] However, since the shaft of the prior art motor is formed of a magnetic material such as iron, when a pulsation occurs in the D / C supplied to the braking means, the change of the magnetic field is transmitted to the speed measuring means through the shaft made of the magnetic material. As a result, an error occurs in the rotational speed of the shaft measured by the speed measuring means, so that there is a problem in that the rotational speed of the shaft cannot be accurately controlled.
[11] The present invention has been made to solve the above problems of the prior art, in the motor for measuring the rotational speed of the motor in accordance with the rotation of the permanent magnet attached to the shaft of the motor to control the rotational speed, installed in the motor It is an object of the present invention to provide a motor capable of precisely controlling the rotational speed of the motor without being affected by the magnetic field change caused by the D / C pulsation by forming the shaft with a nonmagnetic material.
[1] 1 is a cross-sectional view of a motor according to the present invention.
[2] <Description of the symbols for the main parts of the drawings>
[3] 1: casing 2: stator
[4] 3: rotor 4: shaft
[5] 5 braking means 6 speed measuring means
[6] 7: A / C power 8: D / C converter
[7] 9: control unit
[12] The present invention for realizing the above technical problem is a stator, a rotor that is rotated when A / C power is supplied to the stator, a shaft built in the rotor, braking means for braking the shaft when D / C power is supplied; In the motor comprising a permanent magnet fixed to the shaft, a generator for generating a current when the permanent magnet is rotated, and a control unit for measuring the voltage of the generator to control the D / C supplied to the braking means, The shaft is characterized in that formed of a nonmagnetic material.
[13] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[14] As shown in FIG. 1, the present invention provides a cylindrical casing 1, a stator 2 installed inside the casing 1, a rotor 3 rotatably installed inside the stator 2, A shaft 4 arranged in the rotor 3 so as to be rotatable to the casing, a braking means 5 for braking the shaft 4, and a speed measuring means provided at one side of the casing 1; 6) and an A / C power supply 7 connected to the stator 2.
[15] On the other hand, the braking means (5) includes a rotating body (53) fixed to the shaft (4), a braking plate (52) provided to be movable toward the rotating body (53), and the A / C power supply (7). ) Is composed of an electromagnet 51 for braking the shaft 4 by receiving the D / C through the D / C converter 8 and moving the brake plate 52 to the left to contact the rotating body. do.
[16] In addition, the speed measuring means 6 is a permanent magnet 61 installed at one end of the shaft 4, the generator is installed on the outer periphery of the permanent magnet 61 generates a current when the permanent magnet 61 is rotated And a control unit 9 for sensing the voltage of the generator 62 to measure the rotational speed of the shaft 4 and then controlling the power applied to the electromagnet 51 of the braking means according to the rotational speed. ), The shaft 4 is formed of a nonmagnetic material such as stainless steel.
[17] Therefore, when the switch 7a is turned ON and the A / C power supply 7 is applied to the stator 2, the rotor 3 and the shaft 4 are rotated. Even when a pulsation occurs in the D / C applied to the electromagnet 51 through the / C converter 8, since the shaft 4 is formed of a nonmagnetic material, the change of the magnetic field due to the pulsation causes the velocity measuring means ( 6) is not transmitted to the speed measuring means 6 is precisely measured the rotational speed of the shaft (4) without being affected by the pulsation generated in the D / C, the control unit 9 of the motor There is an effect that can accurately control the rotational speed of the shaft (4).
[18] In the motor according to the present invention, since the shaft is formed of a nonmagnetic material, even when a pulsation occurs in the D / C supplied to the braking means of the motor, the magnetic field change due to the pulsation is not transmitted to the speed measuring means of the motor through the shaft. No, there is an effect that can accurately control the rotation of the shaft by measuring the speed of the shaft accurately.

权利要求:
Claims (1)
[1" claim-type="Currently amended] A stator, a rotor rotated when A / C power is supplied to the stator, a shaft built in the rotor, braking means for braking the shaft when D / C power is supplied, a permanent magnet fixed to the shaft, and In the motor consisting of a generator for generating a current when the permanent magnet is rotated, and a control unit for controlling the D / C supplied to the braking means by measuring the voltage of the generator, the shaft is characterized in that the non-magnetic material motor.

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同族专利:

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2001-10-04|Application filed by (주)우진써보

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2001-10-04|Priority to KR1020010061183A

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2003-04-11|Publication of KR20030028894A

优先权:

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申请号 | 申请日 | 专利标题

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KR1020010061183A|KR20030028894A|2001-10-04|2001-10-04|Motor|