A motor control method and a fire-fighting low-frequency inspector
A motor control and controller technology, applied in the direction of AC motor control, motor generator/starter, starter of a single multi-phase induction motor, etc., can solve the problem of low frequency load capacity reduction, motor torque reduction, and difficulty in motor starting. and other problems, to achieve the effect of stable motor speed
Active Publication Date: 2022-07-12
FOSHAN UNIVERSITY
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The AC impedance of the motor is greatly reduced, and the torque of the motor is also reduced with the decrease of the frequency, which reduces the low-frequency load capacity and makes it difficult to start the motor. Therefore, it is necessary to adopt a low-frequency voltage compensation strategy
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
[0033] Example 1, reference figure 1 and figure 2 , the motor frequency increase process is that the frequency gradually rises from a certain value to a certain stable value, and the motor speed fluctuation often occurs in the process of gradual increase. To this end, the present invention provides a motor control method, which includes: raising the asynchronous motor from an initial frequency value to a target frequency value in a step form; the step form includes: each step increment decreases as time increases, and each step increment decreases with time. The time a step lasts decreases with time.
[0034] Lifting in the form of steps uses frequency and time as a rectangular coordinate system, where the abscissa is time, the ordinate is frequency, the unit of time is s, and the unit of frequency is Hz. In the control of the whole asynchronous motor, the frequency and time form a step form, and the relationship between the frequency and time is as follows figure 2 shown...
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 control method and a fire-fighting low-frequency inspector. The motor control method includes: raising an asynchronous motor from an initial frequency value to a target frequency value in a step form; the step form includes: each step increment increases with time decreases with the increase of , and the time that each step maintains decreases with the increase of time. The fire-fighting low-frequency inspection device includes: a controller, a frequency converter, an asynchronous motor and a water pump, the asynchronous motor is connected to the water pump, the frequency converter is connected to the asynchronous motor, and the controller controls the frequency converter to perform: in the form of steps The asynchronous motor is raised from the initial frequency value to the target frequency value; the step form includes: each step increment decreases with the increase of time, and the time maintained by each step decreases with the increase of time. Through the step-shaped lifting rule, the motor speed can be more stable during the rising process. The invention is mainly used in the technical field of motor control.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a motor control method and a fire-fighting low-frequency inspection device. Background technique [0002] Fire inspection is divided into manual inspection and automatic inspection, and automatic inspection is divided into power frequency inspection and low frequency inspection. Manual inspection refers to the regular manual inspection and maintenance of fire-fighting equipment by staff, and the recording and inspection of fire-fighting facilities. Automatic inspection devices can be divided into power frequency and low frequency inspection devices. Power frequency automatic inspection means that the fire pump is periodically driven at rated frequency and rated speed to stop automatically after running for a period of time. Because the power frequency inspection device consumes a lot of electric energy, the operating cost is high, and in order to prevent overpressure from ...
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): H02P1/30H02P27/04
CPCH02P1/30H02P27/047Y02P80/10
Inventor 李欣郑伟佳郑浩邓敏黄润权
Owner FOSHAN UNIVERSITY