Voltage-regulating and energy-saving controller for asynchronous motor
An asynchronous motor and controller technology, applied in AC motor control, motor vibration suppression control, control system and other directions, can solve problems such as motor current and speed oscillation, and achieve the effect of avoiding oscillation, simple circuit structure, and easy implementation and operation.
Inactive Publication Date: 2010-03-17
STATE GRID YANCHENG POWER SUPPLY
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Experimental research shows that when using this voltage regulation method to perform light-load soft start and voltage regulation and energy-saving control of the motor, the phenomenon of motor current and speed oscillation is easy to occur
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 Construction
[0011] Connect the wires according to the mark on the present invention, the power supply of the controller and the fault detection circuit 8 provide power for the present invention after electrification. Before the thyristor is turned on, the three-phase power supply forms a loop through the RC absorption loops in the current synchronous signal detection circuits 2, 4, and 6. At this time, the signals output by the current synchronous signal detection circuits 2, 4, and 6 are zero-crossing signals of the three-phase voltage. This signal is used to judge the phase sequence of the power supply. The control chip 9 judges the circuit measured by the power supply voltage synchronous signal detection circuit 7 according to the measured signal to be phase A, takes the phase A voltage synchronous signal as a reference, and sends A, The trigger pulses of the power thyristors 10, 11, 12 in the B and C three-phase circuits make the motor energized, once there is current flowing through ...
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 utility model relates to a voltage-regulating and energy-saving controller for an asynchronous motor, which is suitable for a variable frequency transmission system in industrial and agriculturalproduction. Mostly, an energy-saving start controller for a generally known asynchronous motor outputs a trigger pulse of a thyristor based on a zero-crossing point of voltage signals of a power supply, and regulates the terminal voltage of the motor to achieve the aim of saving energy. An experimental research indicates that a phenomenon of concussion of the current and the rotating speed of themotor occurs easily when the light load soft start and the voltage-regulating and energy-saving control are performed on the motor in a voltage regulating mode. The voltage-regulating and energy-saving controller comprises a trigger pulse drive circuit, a current synchronization signal detection circuit, a supply voltage synchronization signal detection circuit, a controller power supply, a failure detection circuit, a control chip and a power thyristor, and has the advantages that the concussion phenomenon in a voltage regulating process of voltage synchronization signal is avoided, and the whole circuit has simple structure and is easy to implement and operation by adopting voltage-regulating and energy-saving control signal as a power factor.
Description
technical field [0001] The invention relates to an asynchronous motor voltage regulating energy-saving controller, which is suitable for frequency conversion transmission systems in industrial and agricultural production. It belongs to the field of electrician and motor. Background technique [0002] The known energy-saving starting controllers for asynchronous motors mostly output the trigger pulse of the thyristor based on the zero-crossing point of the voltage signal of the power supply, and adjust the terminal voltage of the motor to achieve the purpose of energy saving. Experimental research shows that when using this voltage regulation method to perform light-load soft start and voltage regulation and energy-saving control of the motor, the phenomenon of motor current and speed oscillation is easy to occur. Thereby, people urgently hope to have a kind of energy-saving controller that can overcome above-mentioned defect come out. Contents of the invention [0003] I...
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 IPC IPC(8): H02P27/02H02P23/04
Inventor 赵阳程明陈军徐浩曹瑞武郝培华王玉彬
Owner STATE GRID YANCHENG POWER SUPPLY