A method for fast and stable speed of three-phase brushless DC motor
A technology of brushing DC motor and motor speed, applied in the direction of single motor speed/torque control, electronic commutator, starting device, etc. Reduce the effect of speed overshoot vibration
Active Publication Date: 2021-07-13
SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
With the progress of society and the development of science and technology, the requirements for the control performance of brushless DC motors are getting higher and higher. In the control of brushless DC motors, the most common method is the PI control method. Although the traditional PI control method can basically meet the control effect , but it is difficult to achieve the expected goal in systems with load changes and high speed and high precision requirements
To meet the requirements of high speed and high precision, it is often necessary to increase the dimension of control, making the algorithm complex and sacrificing the real-time performance of control
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0083] The contents of the above-described invention are only a description of the quick adjustment method of brushless DC motor, and is described in detail in the case where the embodiment is described in detail in the case where it is described in detail.
[0084] The controller is selected as the C8051F580 single chip as the control chip implemented by this algorithm. The clock is 48MHz, and the PWM duty cycle output is completed by the PAC module, and the duty cycle resolution is 1 / 2048.
[0085] 1. Motor speed detection
[0086] Through the Hall sensor detecting the position signal of the motor, the controller records the same positional signal of the same position signal in the same position, and the number N is used by the number N n to indicate the rotational speed. During the traditional motor speed measurement, it is necessary to follow the formula: Rotary = 60 × CLK / (P × N), where CLK is a sampling pulse frequency, set to 23.4 kHz, and select the motor pole logar P = ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for quickly stabilizing the speed of a three-phase brushless DC motor, which comprises the following steps: Step 1, motor speed detection; Step 2, calculating the difference between the target speed and the measured speed; Step 3, calculating the proportional coefficient K p Affects the duty cycle D p ; Step 4, calculate the differential coefficient K d Affects the duty cycle D d ; Step 5, when the set conditions are met, calculate the integral coefficient K i Affects the duty cycle D I ; Step 6, according to the rotational speed difference, use the coefficients k1 and k2 for smoothing the duty cycle, and calculate the final duty cycle D. The fast and stable speed method of the present invention is applied to the DC brushless motor control system, which can meet the motor regulation requirements of high speed, high precision and fast response, and at the same time reduce problems such as overshooting and vibration of the motor speed caused by load changes.
Description
Technical field [0001] The present invention relates to a rapid speed of a three-phase brushless DC motor, which belongs to the technical field of motor. Background technique [0002] Brushless DC motor has the characteristics of high power density, small size, good speed, and simple structure, so wide application in motor control. With the development of social progress and technology, the control performance requirements for brushless DC motor are also increasing, and in the control of brushless DC motor, the most common PI control method, the traditional PI control method can basically meet the control effect However, it is difficult to achieve expected goals for load changes and high-speed, high-precision requirements. To meet high speed, high-precision requirements, often need to increase control dimensions, making algorithms complex and sacrificed the real-time performance. Inventive content [0003] It is an object of the present invention to propose a three-phase brushle...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/17H02P6/20H02P6/06
CPCH02P6/06H02P6/20H02P6/17
Inventor 傅旭东李军福卢灿仇晨光高慧
Owner SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP