A kind of breaking type end short circuit protection method of permanent magnet synchronous motor
A permanent magnet synchronous motor, synchronous motor technology, applied in emergency protection circuit devices, electrical components and other directions, can solve problems such as damage to components in the controller, and achieve the effect of avoiding excessive impact torque
Active Publication Date: 2020-05-29
ZHEJIANG LEAPMOTOR TECH CO LTD
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The technical problem to be solved by the present invention is: the current short-circuit protection method of permanent magnet synchronous motor is likely to cause the technical problem of damage to the components in the controller
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
[0020] A kind of breaking type terminal short-circuit protection method of permanent magnet synchronous motor, such as figure 1 As shown, it is a schematic structural diagram of the short-circuit protection method of Embodiment 1. This embodiment includes a bus voltage filter 200, a voltage slope detector 500, a voltage threshold determiner 300, and an end short-circuit action actuator 400. The bus voltage filter 200 and The synchronous motor 600 is connected to the inverter DC bus 100, and the bus voltage filter 200 filters the voltage of the inverter DC bus 100, and the filtered DC bus voltage values are respectively transmitted to the voltage rise detector and the voltage threshold judger 300 The voltage rise detector detects the rising slope of the DC bus voltage. When the rising slope exceeds the set threshold, the end short-circuit action actuator 400 is triggered to work; the voltage threshold determiner 300 detects whether the DC bus voltage exceeds the set threshold....
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 the technical field of synchronous motor fault treatment, in particular to a breaking end short circuit protection method for a permanent magnet synchronous motor, comprisinga bus voltage filter, a voltage slope detector, a voltage threshold determiner and an end short circuit acting actuator, wherein the bus voltage filter filters DC bus voltages of an inverter, the DC bus voltage values after the filtering are respectively transmitted to a voltage raising detector and the voltage threshold determiner; and when the DC bus voltage values exceed a set threshold, the end short circuit acting actuator is triggered to work. The invention has the substantial effect of always keeping the short-circuit current not exceeding the upper limit threshold during the process ofquick stop of short-circuit disposition of the synchronous motor through the alternate action of the short-circuit actuator and the open-circuit actuator, thereby protecting controller elements of the synchronous motor, and avoiding the problem of excessive impact torque at the moment of short circuit at the same time.
Description
technical field [0001] The invention relates to the technical field of fault handling of synchronous motors, in particular to an on-off end short circuit protection method for permanent magnet synchronous motors. Background technique [0002] Due to its many advantages in design, manufacture and control, permanent magnet synchronous motors are widely used in various industrial production and life occasions. In addition, my country is rich in rare earth resources, and the application market of permanent magnet synchronous motors is particularly large in my country. Permanent magnet synchronous motors can be divided into surface mount type and built-in type according to the similarities and differences of AC-D axis inductance. Because the built-in permanent magnet synchronous motor (IPMSM) can have a wide speed range under the condition of field weakening, it is widely used. If the failure of the permanent magnet synchronous motor reaches a certain level (such as overcurrent,...
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): H02H7/085
Inventor 非凡刘灿林罗斌
Owner ZHEJIANG LEAPMOTOR TECH CO LTD