Laminated bus bar type electromechanical servo driver

Abstract

The invention relates to a laminated bus bar type electromechanical servo driver, which comprises a power device, a socket, a laminated bus bar, a snubber capacitor, a power board and a Hall current sensor. The power device is provided with a bus end and a three-phase end; the socket is fixedly arranged on the outside of the servo driver; the laminated bus bar is provided with a strip-shaped structure, the cross section of the laminated bus bar is shaped like an L, the two sides of the L respectively correspond to a first connecting part and a second connecting part of the laminated bus bar, the first connecting part is connected with the socket, and the second connecting part is connected with the bus end of the power device; the snubber capacitor is arranged at the corner of the L of the laminated bus bar, the snubber capacitor comprises a capacitor terminal, and the capacitor terminal is connected with the bus end of the power device; the Hall current sensor is arranged in the servo driver, and is located at the inner end of the three-phase end of the power device, the Hall current sensor is provided with a sensor cabling hole, and a three-phase cable runs through the sensor cabling hole, and is connected with the three-phase end.

Description

Technical field [0001] The invention relates to a servo driver in an electromechanical servo system for an aircraft, in particular to a laminated busbar type electromechanical servo driver for an aircraft. Background technique [0002] The electromechanical servo system for aircraft mainly includes four parts: servo power supply, servo control driver, servo motor and servo mechanism, among which the servo driver is used to drive the servo motor. At present, servo drives generally use a three-phase full-bridge main circuit to drive the motor, and the three-phase full-bridge circuit is implemented by a power device IPM or IGBT module. [0003] At present, the internal bus connection mode of the servo drive is flexible connection, that is, the flexible wire is drawn from the bus end of the power device and welded to the corresponding solder cup of the socket on the drive housing; this kind of bus connection has two problems, one is to increase Because the stray inductance in the main...

AI Technical Summary

Problems solved by technology

[0003] At present, the internal busbar connection method of the servo drive is flexible wire connection, that is, the flexible wire drawn from the busbar end of the power device is welded to the corresponding solder cup of the socket on the drive housing; there are two problems in this busbar connection method, one is to increase The stray inductance in the main circuit is eliminated. Since the peak voltage generated when the power device is turned off is proportional to the stray inductance, it will cause a large safety hazard in the system; secondly, it will cause complex and unreliable assembly, especially in When the number of busbar terminals of power devices is large

[0004] At present, there is no special absorption circuit designed on the three-phase full-bridge circuit, but the film capacitor on the DC side is used to realize the filter function of the power supply, and the effect is not as good as that of the absorption capacitor.

[0005] The three-phase current detection link usually uses a threaded Hall current sensor when the current is large, and the threaded Hall current sensor is arranged at a certain distance outside the three-phase end of the power device on the power board to provide cable turning. Radius space, so as to ensure that the cable can be normally connected to the three-phase terminal through the wire lug after passing through the threaded Hall current sensor, but this layout takes up a large horizontal space of the driver and increases the volume and weight of the housing

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