Motor starting method, and starting and synchronous operation method of motors powered by different power supplies
A technology of motor starting and power supply, applied in the direction of motor starters, motor generators/starters, control generators, etc., can solve problems such as unit failure, shaft torque generation, and unit failure to operate normally, and achieve accurate control , the effective effect of the method
Pending Publication Date: 2021-12-24
XIAN SHAANGU POWER
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The present invention solves the problem that when two motors powered by different power sources jointly drive the same load, the existing power supply unit master cannot meet the synchronous control requirements. Due to the differences in grid parameters such as the voltage and frequency of the two power sources, shaft torque will be generated. To solve the technical problems that cause the unit to malfunction and make the unit unable to operate normally, provide a motor starting method, a method of starting and synchronously operating motors powered by different power sources
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
[0039] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings. Apparently, the described embodiments do not limit the present invention.
[0040] For the same load 5 driven by the first motor 1 and the second motor 2 powered by different power grids, for the reliable and stable operation of the system, the two motors must have the same speed during operation, and the total output power must reach the load 5 driven by the load 5. required power. The first motor 1 and the second motor 2 should run coaxially. In the case of ensuring the same speed, it is necessary to control the torque output of the two motors and do a good job of power control. If the two motors are out of sync, the motor output and shaft system torsional vibration, etc., and even cause mechanical failure.
[0041] The invention provides a method for synchronous control and power d...
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 belongs to a motor starting and operating method, and aims to solve the problems that when two motors needing different power supplies to supply power jointly drive the same load at present, an existing power supply unit cannot meet the synchronous control requirement, shaft torque is generated due to the difference of power grid parameters such as voltage and frequency of the two power supplies, unit faults are caused and units cannot operate normally. According to the motor starting method and the starting and synchronous operation method for the motors powered by the different power sources, during starting, a first motor running at power frequency is started firstly, and then a second motor running under the control of a variable-frequency torque loop is started. The second motor is started through rotating speed closed-loop control and stator current closed-loop control, after the rotating speed of the second motor is synchronous with the rotating speed of the first motor, the synchronous clutch switches the second motor and the first motor to be coaxially operated, rotating speed loop control of starting of the second motor is cut off, and a torque loop vector control mode is adopted.
Description
technical field [0001] The invention belongs to a method for starting and running a motor, and in particular relates to a starting method for a motor and a method for starting and synchronously running a motor powered by different power sources. Background technique [0002] At present, there are two main types of power supply units: electric drive system and frequency conversion speed regulation system. Electric drive systems generally include motors, frequency converters, and switch cabinets. Among them, the motor is the key equipment in the unit drive system, providing power for the entire unit. Its reliable start and safe and stable operation are the foundation for the normal operation of the entire system. , is essential to ensure the safety and reliability of the unit. For some units operating under variable working conditions, a frequency conversion speed regulation system composed of a frequency converter and a switch cabinet can be used to realize the change of pro...
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): H02P21/34H02P27/08H02P1/58H02P5/46H02P5/50
CPCH02P21/34H02P27/08H02P1/58H02P5/46H02P5/50
Inventor 李宏安刘金平陈党民贾亚妮陈余平王航李勇孙鸿声田渭蓉周宁王小军强科
Owner XIAN SHAANGU POWER