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Motor and its speed control method

A speed control and motor technology, applied in the direction of single motor speed/torque control, control system, motor control, etc., can solve problems such as inconsistent linearity, increased motor cost and difficulty, fan motor speed adjustment, etc.

Active Publication Date: 2019-10-25
SUNON ELECTRONICS (BEIHAI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, as the duty cycle (DUTY CYCLE) of the control signal (such as PWM signal) increases, the ideal rotational speed curve C1 of the motor presents a linear trend, but the actual rotational speed curve C2 of the motor presents a nonlinear curve, and the actual rotational speed curve C2 and The linear shape of the ideal speed curve C1 is inconsistent, so that the speed of the fan motor cannot be adjusted directly using the duty cycle, and an additional speed signal compensation circuit is required to fine-tune the speed, which will increase the cost and difficulty of motor control

Method used

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  • Motor and its speed control method

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Embodiment Construction

[0035] In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings:

[0036] The directional terms described throughout the present disclosure, such as front, rear, left, right, top (top), bottom (bottom), inner, outer, side, etc., mainly refer to the directions of the drawings, and each directional term is only used for The embodiments are used to assist the description and understanding of the present invention, but are not intended to limit the present invention.

[0037] see figure 2 As shown, it is a schematic circuit diagram of an embodiment of the motor system of the present invention. The system embodiment may include a motor 1 and a control unit 2, and the control unit 2 is electrically connected to the motor 1 for outputting a s...

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Abstract

The invention relates to a motor and a method of controlling the rotation speed of the same, and aims to solve the problem that the rotation speed of a conventional motor is non-linear. The method can be applied to a control unit. The control unit is used to adjust the rotation speed of a motor. The method comprises the following steps: generating a logic signal by comparing the voltage value of a reference signal and the voltage value of an oscillation signal by the control unit so as to control the rotation speed of the motor; wherein the voltage value of the reference signal is generated by converting the work period of a pulse-width modulation signal, the waveform of the oscillation signal comprises a charging period and a discharging period, the time of the discharging period is longer than the time of the charging period, and the problem is solved by the abovementioned method.

Description

technical field [0001] The present invention relates to a motor and its control method; in particular, to a motor and its rotational speed control method. Background technique [0002] Existing motors can convert electrical energy into power output, which can be used as a power source for devices such as fans. Taking a fan as an example, the motor drives the fan blades to generate airflow, which can be used for air circulation or heat dissipation. [0003] Taking the existing fan motor as an example, a general fan driver (fan driver ASIC) outputs a control signal to the coil of the motor, and cooperates with an induction component (such as a Hall component) to sense the state parameters of the motor operation, and then the rotor of the motor can be driven. Rotate to output torque. [0004] see figure 1 As shown, it is a schematic diagram of the comparison between the actual speed curve and the ideal speed curve of the existing motor. Among them, with the increase of the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/00H02P6/08
CPCH02P6/08H02P29/00H02P2205/07
Inventor 洪银树郭俊谷
Owner SUNON ELECTRONICS (BEIHAI) CO LTD
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