A Redundant Fault Tolerant Control Method and Application of Position Sensorless Low-speed Start of Switched Reluctance Motor
A switched reluctance motor, redundant fault-tolerant technology, applied in the direction of single motor speed/torque control, electronically commutated motor control, control system, etc., can solve the serious coupling between algorithm and motor control, high controller requirements, and large resources and other problems, to achieve good application prospects, accurate initial positioning and continuous estimation of ultra-low speed position, and enhance the effect of reliability
Active Publication Date: 2020-05-08
NANJING UNIV OF INFORMATION SCI & TECH
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However, the position sensorless algorithm is usually limited by complex algorithms such as complex mathematical models, intelligent algorithms, and observers. It has very high requirements for the controller, occupies a large amount of control resources, and has serious coupling between the algorithm and the motor control. At present, the position sensorless technology Still a hot and difficult issue for switched reluctance motors
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[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] The present invention designs a redundant fault-tolerant control method for switching reluctance motor without position sensor at low speed, such as figure 1 As shown, in practical applications, including non-conducting phase high-frequency signal injection and response current peak suppression method, pulse injection area inductance estimation method, injection chopping area closing method, position estimation area determination method, static starting and low-speed continuous position estimation method, and a position estimation method with fault tolerance when running at medium and low speeds after starting.
[0028] Among them, in order to avoid the problem that the phase inductance saturation nonlinearity is strong due to the large current in the conduction region at the start-up stage, a non-conduction phase...
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The invention relates to a sensorless low-speed starting redundancy fault-tolerant control method of a switched reluctance motor and an application thereof, which realize accurate initial positioningand continuous estimation of an ultra-low-speed position, as well as redundancy and fault-tolerant control during low-speed operation. At that same time, the detection redundancy of winding current information needed by sensorless control is further improved by adopting a switched reluctance motor winding combination mode and a dual-channel power control mode, so that the redundancy and fault tolerance of the sensorless position estimation are improved, and the reliability of a switched reluctance motor driving system is enhanced. The method is suitable for special application occasions such as aerospace starter generators, electric fuel pumps, new energy vehicle drive motors, high-end equipment spindle motors, electric tool drive motors and so on, which require extremely high reliability,severe working environments and frequent large torque start and stop.
Description
technical field [0001] The invention relates to a position sensorless low-speed starting redundant fault-tolerant control method and application of a switched reluctance motor, belonging to the technical field of motor detection. Background technique [0002] The position signal is the basic condition for the high-performance control of the switched reluctance motor. The traditional position sensor is limited by environmental factors such as temperature and oil pollution, and usually cannot operate normally in harsh working environments such as low temperature and high temperature. The position sensorless technology is a way to estimate the rotor position by using the electromagnetic characteristics of the switched reluctance motor. This method can realize the estimation of the rotor position or the direct acquisition of the drive signal without increasing the hardware conditions, thereby replacing the traditional sensor. Ideally, no position sensor can reduce the cost and v...
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IPC IPC(8): H02P6/08H02P6/20
CPCH02P6/085H02P6/20
Inventor 蔡骏陆琳娜向程刘泽远赵兴强
Owner NANJING UNIV OF INFORMATION SCI & TECH