Unlock instant, AI-driven research and patent intelligence for your innovation.
Motor speed control method for hybrid electric vehicle
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A hybrid vehicle, speed control technology, applied in the direction of a single motor speed/torque control, electric vehicles, motors, etc., can solve the problems of inaccurate measurement, amplification of measurement error, and difficulty in practical application.
Active Publication Date: 2012-06-27
CHERY AUTOMOBILE CO LTD
View PDF0 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] 1. As the sampling time increases, the measurement error will be gradually amplified after the differential operation;
[0007] 2. At low speed, due to inaccurate measurement and other reasons, this method is difficult to be practically applied;
[0008] 3. At high speed, if a low-pass filter is used to obtain stable speed control, there will be a phase delay
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] Embodiment one, such as figure 2 Shown: a motor speed control method in a hybrid electric vehicle, the motor control unit (MCU) receives the position signal detected by the motor rotor position sensor, performs analog-to-digital conversion (A / D conversion) and error compensation, and then passes the phase-locked loop technology , output the current speed and position of the rotor, combined with the provided reference speed, use the phase-locked loop feedback technology to control the motor to rotate at the specified speed, including the following steps:
[0028] A. Detect the current rotor position signal;
[0029] B. Calculate the current speed and position of the rotor;
[0030] C. Perform phase-locked loop control on the current speed and reference speed to generate speed signal output.
[0031] Wherein, step A includes the following sub-steps:
[0032] A1. The motor rotor position sensor outputs sine and cosine position analog signals;
[0033] A2. Input the po...
Embodiment 2
[0078] Embodiment two, such as Image 6 Shown is a flow chart of a typical embodiment of the present invention, comprising the following steps:
[0079] 1. The motor position sensor detects the current position signal of the motor rotor;
[0080] 2. The sensor outputs the detected position signal in the form of sine and cosine analog signals;
[0081] 3. In the MCU, the A / D channel of the DSP performs digital-to-analog conversion on the received sine and cosine position analog signals, and performs decoding and compensation;
[0082] 4. In the DSP, the position phase-locked loop control is performed on the compensated position signal;
[0083] 5. Closed-loop output current speed and position signal;
[0084] 6. When the MCU receives the speed message command sent by the HCU, it performs speed phase-locked loop control with the set reference speed and the actual measured current speed to maintain a stable speed output and make the motor run at the specified reference speed. ...
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 motor speed control method in a hybrid powered vehicle. A motor control unit receives position signals detected by a motor rotor position sensor, carries out analog-to-digital conversion and error compensation, calculates current speed and position of a rotor through a phase-lock loop technique, and combines provided reference speed to control a motor to rotate at a set speed by a phase-lock loop feedback technique. The method comprises the following steps: A, detecting the current position signals of the rotator; B, calculating the current speed and the position of the rotor; and C, controlling the current speed and the reference speed by a phase-lock loop to generate speed signal output. The motor speed control method is a typical digital phase-lock loop controlled speed output method; the current speed and the position signals of the rotor are calculated in the phase-lock loop, so as to reduce time delay of position calculation; and because a control algorithm of the phase-lock loop does not adopt differential or difference calculation, even at a high-speed sampling rate, influence of noise on speed is remarkably reduced.
Description
technical field [0001] The invention relates to a method for controlling the rotor speed of a motor, in particular to a method for controlling the speed of the motor by using a phase-locked loop when a permanent magnet synchronous motor is used as an ISG motor of a hybrid electric vehicle. Background technique [0002] With the continuous development of hybrid electric vehicle technology, hybrid electric vehicles powered by gasoline-electric hybrids have gradually been recognized, and the market prospect is very huge. As the key equipment of the hybrid electric motor, the precise speed control of it can not only improve the efficiency of the motor, but also maximize the system efficiency of the entire power system. Permanent magnet synchronous motors, especially permanent magnet synchronous motors with embedded permanent magnets, have the advantages of efficient and adjustable speed operation, so they are more and more widely used in various fields including hybrid power sys...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More