Permanent magnet motor cycle lag compensation and three-phase energized six-beat control device and method
A permanent magnet motor and hysteresis compensation technology, which is applied in motor control, motor generator control, AC motor control, etc., can solve problems such as limited load capacity and no error-proof mechanism for switch Hall, and achieve low misjudgment rate and anti-corrosion Good shaking effect and high reliability
Inactive Publication Date: 2021-03-16
HEBEI UNIV OF TECH
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Problems solved by technology
Using Hall position sensors to drive permanent magnet synchronous motors is a control technology that can ensure the operating performance of the motors and can effectively reduce the cost of the control system. The Hall position sensor of the existing Hall position sensor-based control device consists of three switches. However, because the working environment of the motor is sometimes very harsh, humidity, temperature and electromagnetic interference can affect the performance of the switch Hall, and the switch Hall itself does not have its own error-proof mechanism; its existing control method uses two Phase energized six-beat control, only keeps two phases energized on the motor stator, the load capacity is limited, and the traditional motor control generally adopts current closed-loop PI control, and the control cycle is generally PWM cycle, but such control actually has a certain lag sex
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[0075] In this embodiment, the permanent magnet motor cycle lag compensation and three-phase energized six-beat control device and method, the specific implementation steps are as follows
[0076] 1) Obtain the phase angle θ required for Park transformation and inverse Park transformation s . Install two sets of motor Hall position sensors at intervals of 120 degrees so that each Hall limit signal is determined by two Hall position sensors to prevent signal jitter. 100, 110, 010, 011, 001, and 101 of the Hall code correspond to 0 degrees, 60 degrees, 120 degrees, 180 degrees, 240 degrees, and 300 degrees of the electrical angle of the motor respectively. So θ s 0 degrees or 60 degrees or 120 degrees or 180 degrees or 240 degrees or 300 degrees.
[0077] 2) The three-phase current i a i b and i c After Park transformation, the current i in the rotating coordinate system is obtained α and i β , i 0 is a zero vector. The calculation method is as follows
[0078]
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The invention discloses a permanent magnet motor cycle lag compensation and three-phase electrification six-beat control device and a permanent magnet motor cycle lag compensation and three-phase electrification six-beat control method. The device comprises an IGBT inverter bridge, a current sensor, a permanent manet synchronous motor, a controller, a power battery pack and an anti-shake motor Hall position sensor. The anti-shake Hall position sensor in the device combines two groups of Hall position sensors with six paths of Schmidt trigger inverters, and thus, reliability of the sensors is improved. In the control method, firstly, the conventional vector modulation method is improved, a new vector modulation method is obtained, and computation burden of a microcontroller is reduced; secondly, motor stator current prediction compensation control is used, a problem of lagging of current in the motor control is solved, and finally, in combination with the anti-shake Hall position sensors, a six-beat control strategy is provided, thus, a bridge arm of each phase is electrified in each cycle, loading capacity of the motor is increased, and relative to vector control, switching loss ofa power device is reduced.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a permanent magnet motor period lag compensation and three-phase energized six-beat control device and method Background technique [0002] In a high-performance permanent magnet synchronous motor control system, in order to adjust the rotor speed and position, it is generally necessary to install a position sensor at the motor rotor shaft end for closed-loop control of the speed and position. Commonly used high-precision position sensors include photoelectric encoders and resolvers, but these sensors will bring many problems in practical applications, such as complex hardware structure, increased system cost, increased interface and cables leading to reduced system reliability, and the introduction of electromagnetic interference, etc. . Low-resolution position sensors are mainly switching Hall position sensors. Using Hall position sensors to drive permanent magnet synch...
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IPC IPC(8): H02P21/22H02P25/022H02P27/08
CPCH02P25/022H02P27/08H02P2205/01H02P21/22
Inventor李练兵李铎季亮李政宇王佳孙坤贾志旺赵思锋唐英伟王志强张秀云马立法
OwnerHEBEI UNIV OF TECH