Reverse position-sensorless control method for outdoor fan
An outdoor fan and control method technology, which is applied to heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve the problem of inability to realize the control of fan upwind start-up, and achieve the effect of realizing headwind start-up control.
Active Publication Date: 2015-07-15
SICHUAN CHANGHONG ELECTRIC CO LTD
View PDF4 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the prior art cannot realize the headwind start control when the fan is in reverse operation
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
[0020] The technical solution adopted by the present invention to solve its technical problems is: the single-chip microcomputer MCU obtains the phase electric value between the three-phase electromotive force U / V / W of the motor and its center point N, and further according to the phase voltage of the three-phase electromotive force U / V / W Get the motor speed f by value r and its position θ. Such as figure 1 As shown, when the motor speed f r Less than the reverse drag start frequency f d , it needs to go through the running state from the reverse without position sensor, the control frequency increases from the current frequency to the starting frequency of reverse dragging, and then according to figure 2 The schematic diagram of the control structure shown in the figure controls the operation of the motor step by step, and finally achieves the purpose of forward sensorless operation.
[0021] Under the condition of reverse position sensorless operation, the MCU detects t...
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 relates to a reverse position-sensorless control technology for an outdoor fan provided with a permanent magnetic synchronous direct-current motor, aims to solve a problem of incapability of realizing upwind start control of a fan in a reverse position-sensorless state, and provides a reverse position-sensorless control method for the outdoor fan. The reverse position-sensorless control method comprises the following steps: detecting current running frequency of the motor under a reverse position-sensorless running condition and controlling the motor to run at a frequency from the current running frequency to starting frequency of reverse drag; when reaching the starting frequency of reverse drag by the motor, obtaining a d shaft current command value and a q shaft current command value of the motor through maximum torque control, and entering a reverse drag control state; within reverse drag running time, enabling the running frequency of the motor to gradually change from the starting frequency of reverse drag to a stop state, and realizing reverse drag; controlling the motor to run at a target frequency of positive drag from the stop state, and switching to position-sensorless control after position-sensorless transition time. The reverse position-sensorless control method is suitable for air conditioners.
Description
technical field [0001] The invention relates to an air conditioner control technology, in particular to a permanent magnet synchronous DC motor outdoor fan reverse reverse position sensorless control technology. Background technique [0002] At present, the outdoor fans of air conditioners are generally controlled by tapped motors, which have the disadvantages of low efficiency and non-continuous control of the speed. The industry has begun to use permanent magnet synchronous DC brushless motors as driving components for outdoor fans of air conditioners. [0003] However, when the outdoor unit receives the start-up command from the indoor unit, the outdoor fan motor may be rotating in the forward or reverse direction before the air conditioner is started due to sea wind and other reasons, especially when the outdoor fan is in the reverse running state. , it is necessary to timely control the outdoor fan against the wind, control the outdoor fan motor to the forward rotation ...
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 Applications(China)
IPC IPC(8): H02P6/22F24F11/00
CPCF24F11/70
Inventor 陈跃刘启武涂小平高向军王声纲朱绯赵鹏飞
Owner SICHUAN CHANGHONG ELECTRIC CO LTD