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A single-phase sine wave DC brushless motor speed curve control circuit

A brushless DC motor and speed curve technology, which is applied in the direction of single-phase motor control, single motor speed/torque control, etc., to achieve the effects of suppressing jitter, stabilizing the speed regulation value, and flexible use

Active Publication Date: 2019-11-19
CROSSCHIP MICROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the current development trend of more and more demands on industrial control technology and more and more complex functions, the simple PWM speed regulation based on the proportional control relationship can no longer meet the needs of users well.

Method used

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  • A single-phase sine wave DC brushless motor speed curve control circuit
  • A single-phase sine wave DC brushless motor speed curve control circuit
  • A single-phase sine wave DC brushless motor speed curve control circuit

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Embodiment Construction

[0025] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0026] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0027] This application provides a single-phase sine wave DC brushless motor speed curve control circuit. The speed regulation signal filtering burr circuit filt...

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Abstract

The invention discloses a single-phase sine wave DC brushless motor speed curve control circuit, wherein the circuit comprises: a speed regulation signal filter burr circuit, a speed regulation mode configuration circuit, a speed regulation curve circuit, a selector, a speed regulation anti-shake circuit. The speed regulation output of the single-phase sine wave is realized by changing the duty cycle of the input PWM and the slope of the speed curve to meet different business requirements.

Description

technical field [0001] The invention relates to the field of motor control circuits, in particular to a speed curve control circuit of a single-phase sine wave DC brushless motor. Background technique [0002] The traditional single-phase DC brushless motor adjusts the motor speed by controlling the change of the duty cycle of the PWM signal, that is, after the output speed representing the full rate is compared with the PWM signal with a certain duty cycle, the adjusted output speed is obtained, such as figure 2 shown. [0003] The traditional motor speed control method is described by an equivalent mathematical model. The X-axis is the duty cycle of the PWM signal, and the Y-axis is a proportional function of the output speed, such as image 3 . [0004] It can be seen that in the traditional PWM speed regulation mode, the motor speed and the PWM duty cycle are in a purely proportional relationship, and the normalized proportional coefficient is fixed at 1 (100% of the P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02P6/26
CPCH02P6/08H02P6/26
Inventor 贺杰彭卓陈忠志赵翔
Owner CROSSCHIP MICROSYST