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Electric excitation doubly salient pole motor excitation fault-tolerant power generation system and its control method

A technology of electric excitation double salient poles and motor excitation, which is applied in the direction of controlling generators, control systems, and generators through magnetic field changes, and can solve the problem that three-phase full-bridge converters cannot be applied to switched reluctance generators.

Active Publication Date: 2017-05-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Electrically excited doubly salient motors do not have asymmetrical half-bridge converters, while three-phase full-bridge converters cannot be applied to switched reluctance generators

Method used

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  • Electric excitation doubly salient pole motor excitation fault-tolerant power generation system and its control method
  • Electric excitation doubly salient pole motor excitation fault-tolerant power generation system and its control method
  • Electric excitation doubly salient pole motor excitation fault-tolerant power generation system and its control method

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Embodiment

[0036] θ1 and θ2 represent the turn-on angle and turn-off angle of the winding, respectively, θ1<θ2.

[0037] figure 2 The three-phase current schematic diagram of the fault-tolerant power generation control method of the present invention is shown. In the fault-tolerant operation mode, the self-inductance of the A-phase winding is in the rising stage when the electrical angle of the motor is [0°, 120°), and the winding self-inductance of the A-phase winding is in the rising stage when the motor electrical angle is [120°, 240°). The winding self-inductance of the winding is in the rising stage and in the falling stage. If it is assumed that the current from left to right is positive, when the electrical angle of the motor is θ1 and θ1∈[0°, 120°), a forward current is passed to phase A to gradually increase the current of this phase. When the electrical angle of the motor is θ2[120 °, 240°), the first power switch tube T1 and the eighth power switch tube T8 are controlled to...

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Abstract

The invention provides an excitation fault fault-tolerant power generation system of a double-salient electro-magnetic motor and a control method of the system. According to the control method, when the system detects an excitation fault, an excitation circuit is disconnected and a fault-tolerant mode is switched to for operation, and in the fault-tolerant operation mode, a fault-tolerant power generation function of the excitation fault of the motor is achieved through a novel six-beat power generation control strategy that positive-direction exciting current and negative-direction exciting current are led to each phase of a three-phase four-arm convertor. The control method of the system makes full use of the three-phase four-arm convertor of the double-salient electro-magnetic motor, enables the motor to continue to generate power under the conditions of faults, is suitable for brake feedback motors, starter generators and other multi-quadrant operation double-salient electro-magnetic motors in the aerospace industry, automobile industry and other industries.

Description

technical field [0001] The invention relates to an electric excitation double salient pole motor excitation fault-tolerant power generation system and a control method thereof, belonging to the technical field of special motor fault tolerance. Background technique [0002] Electric excitation double salient pole motor is a new type of motor composed of position sensor, power electronic power converter, excitation power circuit, controller and motor body with salient pole stator and rotor structure. The main function of the excitation power circuit of the electric excitation doubly salient pole motor is to convert the DC excitation power into the DC input current of the motor excitation winding. The controller controls the duty cycle of the corresponding power tube and adjusts the excitation current to realize the control of the motor torque. Aging, damp, heat, corrosion, foreign matter intrusion, impact of external force, etc. may cause damage to the excitation winding of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/30
CPCH02P9/006H02P9/305
Inventor 史立伟周波赵星魏佳丹胡豆豆甘志伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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