A Vector Oriented Control Method for Maximum Torque-Current Ratio Voltage of Permanent Magnet Synchronous Motor
A technology of permanent magnet synchronous motor and maximum torque current, applied in vector control system, motor generator control, electronic commutation motor control, etc. Other questions
Inactive Publication Date: 2020-12-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
The proposed VVDC method can effectively solve the existing problems in the existing SVPWM algorithm, such as complex coordinate transformation, cumbersome sector judgment operations, and redundant duty cycle calculations.
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[0023] The invention provides a maximum torque current ratio voltage vector directional control method of a permanent magnet synchronous motor, and the system for realizing the method is shown in the appendix figure 1 , the rotor position detection module is used to detect the rotor position in real time, and send the output value θ to the coordinate transformation module and the angular velocity calculation module; the angular velocity calculation module sends the output value ω to the speed feedback module; the speed feedback module sends the angular velocity given value ω ref The difference between ω and ω is passed through the speed feedback PI controller, and the output i q * to the current feedback module; the voltage feedback module outputs d, q axis current compensation value i dcom i qcom , and output to the current feedback module; phase current i a i b i c After the Clarke transformation module and the Park transformation module, the output value i d i q sent...
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The invention discloses a permanent magnet synchronous motor maximum torque current ratio voltage vector directional control method. The implementation system of the method includes nine parts: a voltage source inverter bridge, a permanent magnet synchronous motor, a rotor position detection module, a coordinate transformation module, an angular velocity calculation module, a speed feedback module, a current feedback module, a voltage feedback module and a VVDC module. The voltage feedback module is used for realizing the maximum torque current ratio control strategy. The VVDC module comprisesa voltage vector calculation module, a voltage vector sector judgment module, a duty ratio calculation module, a modulation wave generator, a triangular carrier generator and a PWM generator. The maximum torque current ratio voltage vector directional control method does not need to perform Park inverse coordinate transformation and can effectively solve the problems of complex coordinate transformation, complicated sector judgment operation and redundant duty cycle calculation existing in the present SVPWM algorithm and provides a simple and effective control method for the implementation ofthe maximum torque current ratio control strategy of the permanent magnet synchronous motor.
Description
technical field [0001] The invention relates to a maximum torque current ratio voltage vector directional control method of a permanent magnet synchronous motor, which belongs to the field of motor control. Background technique [0002] Permanent magnet synchronous motor (PMSM, permanent magnet synchronous motor) has the characteristics of simple structure, high power density and high efficiency. In recent years, many scholars have studied its control methods. [0003] The existing technology usually adopts space voltage vector pulse width modulation (SVPWM, space vector pulse width modulation) to control PMSM, but the existing SVPWM algorithm needs to carry out three complex coordinate transformations (Park transformation, Clarke transformation and Park inverse transformation), and in There are problems such as cumbersome calculation and redundant calculation in the process of voltage vector sector judgment and duty cycle calculation. "SVPWM Algorithm Based on Modulation F...
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Patent Timeline
Login to View More IPC IPC(8): H02P21/00H02P21/14H02P21/18H02P21/20H02P21/22
CPCH02P21/0003H02P21/14H02P21/18H02P21/20H02P21/22
Inventor 宋强赵嗣芳李易庭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY