Fast three-vector model predictive control method based on hybrid power supply type open-winding permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and model predictive control, which is applied in motor generator control, electronically commutated motor control, motor control, etc., and can solve problems such as increasing algorithm complexity and large torque ripple

CN110299882AActive Publication Date: 2019-10-01ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-10-01

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Abstract

The invention discloses a fast three-vector model predictive control method based on a hybrid power supply type open-winding permanent magnet synchronous motor. According to the method, three different control constraints of capacitor voltage balance, stator flux linkage amplitude and electromagnetic torque are unified, a next beat system voltage reference value is predicted according to the collected three-phase current and DC capacitor voltage, two inverters are allocated, then a voltage vector combination with a smallest error of the voltage reference value and a duty ratio are obtained byusing a fast three-vector method, a corresponding switching signal is used as a driving signal of the double inverters, and therefore, the control of the hybrid power supply type open-winding permanent magnet synchronous motor is achieved. According to the method, by unifying the three different control constraints into a single voltage control constraint, two weighting factors are eliminated, thedifficulty of implementing the model predictive control is effectively reduced, an optimal voltage vector combination and duty ratio are selected by a quick three-vector method, the complexity of analgorithm is effectively reduced, and the steady state control performance of a system is improved.
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Description

technical field

[0001] The invention belongs to the technical field of motor control, and in particular relates to a fast three-vector model predictive control method based on a hybrid power supply type open-winding permanent magnet synchronous motor. Background technique

[0002] In recent years, due to the advantages of high power factor, simple structure, flexible control and reliable operation, permanent magnet synchronous motors have been widely used in military industry, aerospace, electric vehicles, national economy, industrial and agricultural production and other fields. However, as the power level of the above-mentioned applications continues to increase, a single power electronic converter drive system can no longer meet the performance requirements. For this reason, the open-winding permanent magnet synchronous motor system powered by a new type of double-inverter with double-terminal power supply has attracted extensive attention from scholars and industries at ...

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Embodiment Construction

[0068] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0069] Such as figure 1 As shown, the hybrid power supply type open-winding permanent magnet synchronous motor system of the present invention includes: open-winding permanent magnet synchronous motor 1, main inverter 2, auxiliary inverter 3, three-phase stator current sensor 4-1, main inverter DC source voltage sensor 4-2, auxiliary inverter DC capacitor voltage sensor 4-3, rotor photoelectric encoder 4-4, state observer 4-5 and system control module 12. The system control module 12 takes the output voltage of the dual inverters as the control object, and unifies the three control constraints of the auxiliary inverter DC capacitor voltage balance control, open-winding permanent magnet synchronous motor 1 stator flux linkage amplitude and electromagnetic ...