Controller of single-phase direct-current permanent magnet brushless motor, control method and motor power system

Abstract

The invention discloses a controller and a control method of a single-phase direct-current permanent magnet brushless motor used by a near space airship motor power system. The controller comprises aposition signal acquisition module, a pulse duty ratio calculation module, a pulse switching module and a pulse output module. The position signal acquisition module is connected with the pulse switching module, the pulse output module is connected with the pulse duty ratio calculation module and the pulse switching module, the pulse output module comprises two timers, the two timers respectivelygenerate two paths of pulse square waves, and the duty ratio of the pulse square waves output by the timers is adjusted according to the pulse duty ratio; and the pulse switching module is used for determining whether to switch the pulse output state or not according to the rotor position information and the current pulse output state. The processor judges the position of the motor rotor by inputting the level signals of the level of the output port so as to control the starting and running of the motor.

Description

technical field [0001] The invention relates to a power propulsion motor controller, in particular to a controller for a single-phase DC permanent magnet brushless motor. Background technique [0002] At present, under the guidance of the development of science and technology and the direction of the national energy conservation and emission reduction strategy, permanent magnet motor power systems are widely used in manufacturing fields such as electric vehicles, high-speed rail, adjacent space and aviation. The power system mainly includes drive controllers and brushless motors. There are two parts of permanent magnet motor, among which, brushless permanent magnet motor mainly includes brushless permanent magnet synchronous motor, brushless permanent magnet DC motor and brushless permanent magnet DC single-phase motor, etc., while the control function and performance of the drive controller are in To a large extent, it determines the power economy, stability, braking, safet...

AI Technical Summary

Problems solved by technology

The single-phase DC motor has no position sensor. Because the motor has a starting and running dead point, the starting control performance is poor, which makes it difficult to develop a single-phase DC motor controller.

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