An electric vehicle, a brushless DC motor and its drive control system
A brushed DC motor and drive control technology, applied in the direction of motor control, DC motor speed/torque control, control system, etc., can solve problems such as loss of control of electric vehicles, traffic safety accidents, etc. The effect of avoiding the loss of control of electric vehicles
Active Publication Date: 2016-01-20
广东高标智能科技股份有限公司
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Problems solved by technology
[0005] The purpose of the embodiments of the present invention is to provide a drive control system for a brushless DC motor, which aims to solve the problem in the prior art that when the three-phase brushless DC motor is in a phase-out state, it is easy to cause the application of the three-phase brushless DC motor Electric vehicles out of control, causing traffic safety accidents
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0021] In order to solve the problems existing in the prior art, the drive control system of the brushless DC motor provided by the embodiment of the present invention switches to the fault operation mode after detecting any phase winding fault, and the control unit controls the power switch in the drive unit to perform corresponding actions , so that during the energization period of the faulty winding under normal working conditions, the non-faulty winding is used to replace the faulty winding for energization.
[0022] figure 2 It is the principle of the drive control system of the brushless D...
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The invention belongs to the technical field of motor driving, and provides an electric vehicle, a brushless direct-current motor and a driving control system thereof. The driving control system comprises a driving unit which is formed by a power switch and further comprises a fault detecting unit and a control unit, wherein the fault detecting unit is used for detecting line currents of each phase winding in a motor winding of the brushless direct-current motor and sending a fault signal when any phase winding has no line currents in a preset time period, the control unit is used for controlling the power switch in the driving unit to execute corresponding action after the fault signal sent by the fault detecting unit is received to enable the motor winding to work under the fault working condition. The fault working condition refers to the fact that the fault winding in the motor winding in a power-on period under a normal working condition is replaced by a non-fault winding in the motor winding to be powered on, the power-on non-fault winding is used for dragging magnetic steel to rotate continually, therefore, the brushless direct-current motor is guaranteed to be capable of running safely under a phase loss state, and the occurrence of accidents is avoided.
Description
technical field [0001] The invention belongs to the technical field of motor drive, and in particular relates to an electric vehicle, a brushless DC motor and a drive control system thereof. Background technique [0002] Electric vehicles are locomotives driven by electricity, including electric bicycles, electric motorcycles, electric tricycles / four-wheelers, etc. At present, general-purpose electric vehicles use three-phase brushless DC motors, including three-phase stator windings, rotor magnets, and drive control systems. The drive control system uses a power switch to control whether the winding is energized or not, and to control the direction of the current in the winding, thereby driving the rotor magnet to rotate. [0003] Figure 1A to Figure 1F Taking a pair of rotor magnets and stator windings in a star connection as an example, the relationship between the motor windings and the rotor magnets of a three-phase brushless DC motor provided by the prior art under n...
Claims
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IPC IPC(8): H02P7/00H02P29/028
Inventor 陈清付柏松温瑭玮
Owner 广东高标智能科技股份有限公司