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Digital single-cycle control method for multiplexed-output magnetic bearing switch power amplifier

A single-cycle control, multi-channel output technology, applied in the direction of output power conversion devices, bearings, shafts and bearings, can solve the problems of the application of multi-arm switching power amplifiers, such as no relevant literature, to save DSP chip resources , simple implementation, and the effect of reducing performance and cost requirements

Active Publication Date: 2014-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In recent years, scholars have conducted in-depth research on the theoretical application of single-cycle control, but there is no relevant literature on the application of multi-arm switching power amplifiers.

Method used

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  • Digital single-cycle control method for multiplexed-output magnetic bearing switch power amplifier
  • Digital single-cycle control method for multiplexed-output magnetic bearing switch power amplifier
  • Digital single-cycle control method for multiplexed-output magnetic bearing switch power amplifier

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Embodiment Construction

[0021] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] This specific implementation mode takes the six-arm five-way output magnetic bearing switching power amplifier as an example, as figure 1 The schematic diagram of the system structure of this embodiment is shown, and the system includes a six-arm five-way output switching power amplifier main power circuit and a DSP controller. The main power circuit contains 12 switching tubes S n1 , S n2 , S a1 , S a2 , S b1 , S b2 , S c1 , S c2 , S d1 , S d2 , S e1 , S e2 and 12 diodes D n1 、D n2 、D a1 、D a2 、D b1 、D b2 、D c1 、D c2 、D d1 、D d2 、D e1 、D e2 Constitute 6 half-bridge arms, the 6 half-bridge arms are 5 load bridge arms A, B, C, D, E and 1 common bridge arm N, five inductive loads L a , L b , L c , L d , L e It is connected to the common bridge arm N through the neutral line. The DSP controller includes an A...

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Abstract

The invention discloses a digital single-cycle control method for a multiplexed-output magnetic bearing switch power amplifier. According to the method, the duty ratio of a public bridge arm power device is fixed, only bus voltages, N paths of inductive currents and N paths of given current signals need to be sampled, and the PWM control signals of the power devices of N loaded bridge arms can be obtained through a digital controller in a computing mode. According to the digital single-cycle control method, a public bridge arm does not need to be controlled independently, the digital control structure of the switch power amplifier can be effectively simplifier, few DSP chip resources are occupied, the real-time computing capacity is improved, the changes of the currents with different polarities of N paths of output currents can be met at the same time, the complete decoupling control over the N paths of output currents is achieved, control precision is high, dynamic responses are good, arithmetic speed is high, implementation is simple, and high economic value and practical value are achieved.

Description

technical field [0001] The invention belongs to the field of power amplifiers, and in particular relates to a digital single-cycle control method for multi-channel output magnetic bearing switch power amplifiers. Background technique [0002] The switching power amplifier system applied to the five-degree-of-freedom magnetic suspension bearing system generally requires five independent switching power amplifiers. The complexity, bulkiness and high cost of its control system have become the key factors restricting the development of magnetic suspension bearings. The six-arm five-way output switching power amplifier circuit topology is used as the main circuit of the five-degree-of-freedom magnetic suspension bearing switching power amplifier. Compared with the power amplifier, only 3 / 5 of the switch tube can realize the control of the five degrees of freedom, and the cost can be reduced. [0003] The existing six-arm five-output switching power amplifier control methods, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02N15/00F16C32/04
Inventor 刘程子邓智泉李克翔周杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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