Electromagnetic braking linear motor system and its control method

A technology of linear motor and electromagnetic brake, which is applied in the direction of motor generator control, AC motor control, control system, etc., can solve the problems of rail temperature rise, etc., to reduce the length of the end, reduce the volume and weight, and reduce the output Effect of Current and Loss

Active Publication Date: 2017-01-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the eddy currents in the train braking system in the existing rail transit field generate a large amount of heat and cause the temperature of the rail to rise, the present invention proposes an electromagnetic braking linear motor system and its control method

Method used

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  • Electromagnetic braking linear motor system and its control method

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specific Embodiment approach 1

[0024] Specific implementation mode one: see figure 2 This embodiment will be described. The electromagnetic braking linear motor system described in this embodiment includes a linear motor and an inverter. The system also includes a multi-phase exciting capacitor bank and a plurality of inductors. The linear motor is a flat linear induction motor. The induction motor includes a primary and a secondary, the primary includes a primary iron core and a primary winding, the side of the primary iron core facing the air gap has a slot perpendicular to the relative movement direction of the primary and the secondary, and the primary winding is embedded in the slot, the The primary winding is an annular multi-phase symmetrical winding, the output end of the annular multi-phase symmetrical winding is connected to the inverter, and a set of multi-phase exciting capacitor banks is connected in parallel to the output end of the annular multi-phase symmetrical winding; An inductor is con...

specific Embodiment approach 2

[0028] Specific implementation mode two: see figure 2 This embodiment will be described. The difference between this embodiment and the electromagnetic braking linear motor system described in Embodiment 1 is that this embodiment adds a plurality of inductors, and an inductor is connected in series between the output end of each phase winding in the primary winding and the inverter.

[0029] see figure 2 As shown, it is a structural schematic diagram of an electromagnetic braking linear motor system described in this embodiment. This structure is composed of a linear motor, an exciting capacitor bank, an energy absorbing resistor bank and an inverter. The linear motor includes a primary and Secondary, the primary is mainly composed of a primary iron core and a primary winding; the primary iron core is in the shape of a flat plate, and slots are made perpendicular to the direction of motion on the side of the primary iron core facing the air gap, and a set of annular multi-p...

specific Embodiment approach 3

[0031] Specific implementation mode three: see figure 1This embodiment will be described. The electromagnetic braking linear motor system described in this embodiment includes a linear motor and an inverter. The system also includes a multi-phase excitation capacitor bank. The linear motor is a flat linear induction motor, and the linear induction motor includes a primary and secondary, the primary includes a primary core and a primary winding, the primary winding is composed of two sets of ring-shaped multi-phase symmetrical windings, and the primary core is slotted on the side facing the air gap perpendicular to the relative movement direction of the primary and secondary A primary winding is embedded in the slot, one set of annular multi-phase symmetrical windings in the primary winding is connected to the multi-phase excitation capacitor bank, and the other set of annular multi-phase symmetrical windings is connected to the inverter.

[0032] The main difference between t...

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Abstract

An electromagnetic braking linear motor system and a control method thereof. The invention relates to an electromagnetic braking linear motor system and a control method thereof, belonging to the field of motors. The primary iron core of the linear motor in the system is in the shape of a flat plate, and the output end of the primary winding is connected in parallel with a group of multiphase energy absorbing resistors, or the primary winding adopts two sets of multiphase windings, and one of the sets of multiphase windings is connected in parallel with multiphase energy absorbing resistors. One set of resistors, the other set is connected to the inverter. The control method is as follows: when the relative speed between the mover and the stator of the linear motor is medium or high speed, control the frequency and phase of the output current of the inverter so that the linear motor works in the power generation braking mode; When the speed is low, controlling the frequency and phase of the inverter output current makes the linear motor work in reverse braking mode. The invention is applicable to the train braking system in the field of rail transit, and is also applicable to the braking system of linear drive devices such as power machinery testing, lifting devices, and amusement facilities.

Description

technical field [0001] The invention relates to an electromagnetic brake linear motor system and a control method thereof, belonging to the field of motors. Background technique [0002] The high-speed train involves two key issues of train driving and braking. Among them, the braking of high-speed trains should be given enough attention. The basic idea of ​​high-speed train braking is the same as that of train braking at conventional speeds, that is, to consume the kinetic energy of train motion to slow down or stop the train. Because the kinetic energy of high-speed trains is much greater than that of ordinary trains, and the coefficient of adhesion between the wheels and rails under high speed and the friction coefficient between brake shoes and moving wheels are greatly reduced, high-speed trains must adopt a new braking system. According to the analysis of existing data, the braking of high-speed trains adopts the combined braking system of regenerative braking, eddy c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/025H02K11/00H02P25/06H02P3/20H02K11/20H02K11/33H02P25/062
CPCH02P3/20H02P25/06H02P3/18H02P25/064H02P25/062
Inventor 寇宝泉陈宇声尹相睿谢逸轩
Owner HARBIN INST OF TECH
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