Switch type power amplification device and method for simulating current transformation control

Abstract

The invention relates to the technical field of power electronics, and discloses a switch type power amplification device and a method for simulating current transformation control. The switch type power amplification device comprises a simulation-side current transformation circuit, a direct-current bus circuit and a power-side current transformation circuit which are sequentially connected with one another. The simulation-side current transformation circuit comprises an input filter, parallel filter inductors and three-phase two-level parallel arms which are sequentially connected with one another; the input filter is of an LC structure, capacitors are arranged on a side where the parallel filter inductors are arranged, 3n arms are connected with one another on direct-current sides in parallel to form each three-phase two-level parallel arm, each phase of each three-phase two-level parallel arm is provided with the n corresponding arms, and the n is larger than or equal to 2; filter inductors are serially connected with a middle point of each arm, and LCL type filters can be jointly equivalently formed by the filter inductors and the input filter after the filter inductors are subjected to phase separation and are connected with one another in parallel; switches in the three-phase two-level parallel arms are power electronic full-control type devices. The switch type power amplification device and the method have the advantages that the control bandwidth of the switch type power amplification device can be increased, the dynamic response time can be shortened, the adaptability to measured motor control driving devices with different technical characteristics can be improved, and the switch type power amplification device and the method are high in practicality.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a switch-type power amplifier and an analog converter control method. Background technique [0002] A motor is a device that uses an electromagnetic field as a medium to convert mechanical energy and electrical energy. According to the direction of energy conversion, it is divided into two working modes: electric motor (that is, converting electrical energy into mechanical energy) and generator (that is, converting mechanical energy into electrical energy). According to the different forms of mechanical motion, it can be divided into rotary motor and linear motor. This article involves It is a rotating electrical machine, and the electrical machines mentioned later are also rotating electrical machines. [0003] The working characteristics of the motor are not only related to its body parameters and process, but also mainly determined by the control drive device. Diff...

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Problems solved by technology

However, there are the following problems: 1) There are certain safety hazards in the high-speed rotating mechanical parts of the motor stand; 2) It is difficult to test extreme working conditions and various fault conditions; 3) The motor control characteristics of the simulated mechanical load are very demanding; 4) It is difficult to flexibly change the type and parameters of the test motor

[0007] Although the "PHIL" test scheme for motor control drives has many advantages in theory, in practice, its accuracy and effectiveness are largely limited by the performance of the power amplifier

The power amplification device in the "PHIL" test scheme involved in the prior art has small control bandwidth, long dynamic response time, poor adaptability to the tested motor control drive device, and cannot adapt to the test motor control drive device with different technical characteristics. , resulting in less practical

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